113 results on '"Zipser, Carl M"'
Search Results
2. Cerebrospinal fluid pressure dynamics across the intra- and postoperative setting: Retrospective study of a spine surgery cohort
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Kheram, Najmeh, Boraschi, Andrea, Aguirre, José, Farshad, Mazda, Pfender, Nikolai, Curt, Armin, Schubert, Martin, Kurtcuoglu, Vartan, and Zipser, Carl M.
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- 2024
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3. A minimum data set-Core outcome set, core data elements, and core measurement set-For degenerative cervical myelopathy research (AO Spine RECODE DCM): A consensus study
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Davies, Benjamin M., Yang, Xiaoyu, Khan, Danyal Z., Mowforth, Oliver D., Touzet, Alvaro Y., Nouri, Aria, Harrop, James S., Aarabi, Bizhan, Rahimi-Movaghar, Vafa, Kurpad, Shekar N., Guest, James D., Tetreault, Lindsay, Kwon, Brian K., Boerger, Timothy F., Rodrigues-Pinto, Ricardo, Furlan, Julio C., Chen, Robert, Zipser, Carl M., Curt, Armin, Milligan, James, Kalsi-Rayn, Sukhivinder, Sarewitz, Ellen, Sadler, Iwan, Blizzard, Tammy, Treanor, Caroline, Anderson, David, Fallah, Nader, Hazenbiller, Olesja, Salzman, Carla, Zimmerman, Zachary, Wandycz, Anne M., Widdop, Shirley, Reeves, Margaret, Raine, Rye, Ryan, Sukvinder K., Malone, Ailish, Gharooni, Ali, Wilson, Jefferson R., Martin, Allan R., Fehlings, Michael G., McNair, Angus G. K., and Kotter, Mark R. N.
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Medical research -- Methods -- Standards -- Information management ,Medicine, Experimental -- Methods -- Standards -- Information management ,Spinal diseases -- Research ,Degeneration (Pathology) -- Research ,Company systems management ,Biological sciences - Abstract
Background Degenerative cervical myelopathy (DCM) is a progressive chronic spinal cord injury estimated to affect 1 in 50 adults. Without standardised guidance, clinical research studies have selected outcomes at their discretion, often underrepresenting the disease and limiting comparability between studies. Utilising a standard minimum data set formed via multi-stakeholder consensus can address these issues. This combines processes to define a core outcome set (COS)-a list of key outcomes-and core data elements (CDEs), a list of key sampling characteristics required to interpret the outcomes. Further 'how' these outcomes should be measured and/or reported is then defined in a core measurement set (CMS). This can include a recommendation of a standardised time point at which outcome data should be reported. This study defines a COS, CDE, and CMS for DCM research. Methods and findings A minimum data set was developed using a series of modified Delphi processes. Phase 1 involved the setup of an international DCM stakeholder group. Phase 2 involved the development of a longlist of outcomes, data elements, and formation into domains. Phase 3 prioritised the outcomes and CDEs using a two-stage Delphi process. Phase 4 determined the final DCM minimal data set using a consensus meeting. Using the COS, Phase 5 finalised definitions of the measurement construct for each outcome. In Phase 6, a systematic review of the literature was performed, to scope and define the psychometric properties of measurement tools. Phase 7 used a modified Delphi process to inform the short-listing of candidate measurement tools. The final measurement set was then formed through a consensus meeting (Phase 8). To support implementation, the data set was then integrated into template clinical research forms (CRFs) for use in future clinical trials (Phase 9). In total, 28 outcomes and 6 domains (Pain, Neurological Function, Life Impact, Radiology, Economic Impact, and Adverse Events) were entered into the final COS. Thirty two outcomes and 4 domains (Individual, Disease, Investigation, and Intervention) were entered into the final CDE. Finally, 4 outcome instruments (mJOA, NDI, SF-36v2, and SAVES2) were identified for the CMS, with a recommendation for trials evaluating outcomes after surgery, to include baseline measurement and at 6 months from surgery. Conclusions The AO Spine RECODE-DCM has produced a minimum data set for use in DCM clinical trials today. These are available at https://myelopathy.org/minimum-dataset/. While it is anticipated the CDE and COS have strong and durable relevance, it is acknowledged that new measurement tools, alongside an increasing transition to study patients not undergoing surgery, may necessitate updates and adaptation, particularly with respect to the CMS., Author(s): Benjamin M. Davies 1,2,*, Xiaoyu Yang 1, Danyal Z. Khan 3,4, Oliver D. Mowforth 1,2, Alvaro Y. Touzet 5, Aria Nouri 1,6, James S. Harrop 7, Bizhan Aarabi 8, [...]
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- 2024
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4. Neurophysiology and advanced dynamic assessments in degenerative cervical myelopathy
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Scheuren, Paulina S., primary, Zipser, Carl M., additional, Hupp, Markus, additional, Rosner, Jan, additional, Pfender, Nikolai, additional, Schubert, Martin, additional, Hubli, Michèle, additional, and Curt, Armin, additional
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- 2023
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5. List of contributors
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Ahrens, Jessica, primary, Alison, David, additional, Alvi, Mohammed Ali, additional, Araujo, Gabriela Landim, additional, Arnold, Paul M., additional, Atalay, Basar, additional, Brockie, Sydney, additional, Christopher, Susan R., additional, Curt, Armin, additional, David, Gergely, additional, Davies, Benjamin M., additional, Fehlings, Michael G., additional, Freund, Patrick, additional, Furlan, Julio C., additional, G. Fehlings, Michael, additional, Geng Li, Rui T, additional, Gengli, Tony, additional, Ghogawala, Zoher, additional, Gholamrezaei, Gita, additional, Guglielmi, Gina, additional, Hejrati, Nader, additional, Hong, James, additional, Hubli, Michèle, additional, Hupp, Markus, additional, Janevski, Joshua, additional, Johnson, Ryan M., additional, Kalsi-Ryan, Sukhvinder, additional, Karthikeyan, Vishu, additional, Kato, So, additional, Kotter, Mark R., additional, Lavé, Alexandre, additional, Loh, Eldon, additional, Malhotra, Armaan K., additional, Manoharan, Ragavan, additional, Martin, Allan R., additional, Milligan, James, additional, Moghaddamjou, Ali, additional, Molliqaj, Granit, additional, Nagoshi, Narihito, additional, Naik, Anant, additional, Nouri, Aria, additional, Patet, Gildas, additional, Pedro, Karlo M., additional, Pfender, Nikolai, additional, Poulin, Noah, additional, Raj, Aditya, additional, Rocos, Brett, additional, Rosner, Jan, additional, Sadat, Sarah, additional, Scheuren, Paulina S., additional, Schubert, Martin, additional, Seif, Maryam, additional, Shakil, Husain, additional, Sharma, Mihir, additional, Srikandarajah, Nisaharan, additional, Tessitore, Enrico, additional, Tetreault, Lindsay, additional, Vaccaro, Alexander, additional, Vidal, Pia M., additional, Wilson, Jamie R.F., additional, Wilson, Jefferson R., additional, Yanez Touzet, Alvaro, additional, and Zipser, Carl M., additional
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- 2023
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6. Discharge Destinations of Delirious Patients: Findings From a Prospective Cohort Study of 27,026 Patients From a Large Health Care System
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Zipser, Carl M., Spiller, Tobias R., Hildenbrand, Florian F., Seiler, Annina, Ernst, Jutta, von Känel, Roland, Inouye, Sharon K., and Boettger, Soenke
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- 2022
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7. Cell-based and stem-cell-based treatments for spinal cord injury: evidence from clinical trials
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Zipser, Carl M, Cragg, Jacquelyn J, Guest, James D, Fehlings, Michael G, Jutzeler, Catherine R, Anderson, Aileen J, and Curt, Armin
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- 2022
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8. Motor cortical excitability and paired-associative stimulation-induced plasticity in amnestic mild cognitive impairment and Alzheimer’s disease
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Meder, Adam, Liepelt-Scarfone, Inga, Sulzer, Patricia, Berg, Daniela, Laske, Christoph, Preische, Oliver, Desideri, Debora, Zipser, Carl M., Salvadore, Giacomo, Tatikola, Kanaka, Timmers, Maarten, and Ziemann, Ulf
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- 2021
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9. A Clinical Practice Guideline for the Management of Patients With Acute Spinal Cord Injury: Recommendations on Hemodynamic Management
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Kwon, Brian K., Tetreault, Lindsay A., Martin, Allan R., Arnold, Paul M., Marco, Rex A.W., Newcombe, Virginia F.J, Zipser, Carl M., McKenna, Stephen L., Korupolu, Radha, Neal, Chris J., Saigal, Rajiv, Glass, Nina E., Douglas, Sam, Ganau, Mario, Rahimi-Movaghar, Vafa, Harrop, James S., Aarabi, Bizhan, Wilson, Jefferson R., Evaniew, Nathan, Skelly, Andrea C., Fehlings, Michael G., Kwon, Brian K., Tetreault, Lindsay A., Martin, Allan R., Arnold, Paul M., Marco, Rex A.W., Newcombe, Virginia F.J, Zipser, Carl M., McKenna, Stephen L., Korupolu, Radha, Neal, Chris J., Saigal, Rajiv, Glass, Nina E., Douglas, Sam, Ganau, Mario, Rahimi-Movaghar, Vafa, Harrop, James S., Aarabi, Bizhan, Wilson, Jefferson R., Evaniew, Nathan, Skelly, Andrea C., and Fehlings, Michael G.
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STUDY DESIGN: Clinical practice guideline development following the GRADE process. OBJECTIVES: Hemodynamic management is one of the only available treatment options that likely improves neurologic outcomes in patients with acute traumatic spinal cord injury (SCI). Augmenting mean arterial pressure (MAP) aims to improve blood perfusion and oxygen delivery to the injured spinal cord in order to minimize secondary ischemic damage to neural tissue. The objective of this guideline was to update the 2013 AANS/CNS recommendations on the hemodynamic management of patients with acute traumatic SCI, acknowledging that much has been published in this area since its publication. Specifically, we sought to make recommendations on 1. The range of mean arterial pressure (MAP) to be maintained by identifying an upper and lower MAP limit; 2. The duration of such MAP augmentation; and 3. The choice of vasopressor. Additionally, we sought to make a recommendation on spinal cord perfusion pressure (SCPP) targets. METHODS: A multidisciplinary guideline development group (GDG) was formed that included health care professionals from a wide range of clinical specialities, patient advocates, and individuals living with SCI. The GDG reviewed the 2013 AANS/CNS guidelines and voted on whether each recommendation should be endorsed or updated. A systematic review of the literature, following PRISMA standards and registered in PROSPERO, was conducted to inform the guideline development process and address the following key questions: (i) what are the effects of goal-directed interventions to optimize spinal cord perfusion on extent of neurological recovery and rates of adverse events at any time point of follow-up? and (ii) what are the effects of particular monitoring techniques, perfusion ranges, pharmacological agents, and durations of treatment on extent of neurological recovery and rates of adverse events at any time point of follow-up? The GDG combined the information from this systematic
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- 2024
10. A Clinical Practice Guideline for Prevention, Diagnosis and Management of Intraoperative Spinal Cord Injury: Recommendations for Use of Intraoperative Neuromonitoring and for the Use of Preoperative and Intraoperative Protocols for Patients Undergoing Spine Surgery
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Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364, Alvi, Mohammed Ali; https://orcid.org/0000-0002-7131-079X, Evaniew, Nathan; https://orcid.org/0000-0003-1974-5224, Tetreault, Lindsay A, Martin, Allan R; https://orcid.org/0000-0002-9495-5654, McKenna, Stephen L; https://orcid.org/0000-0003-2030-8988, Rahimi-Movaghar, Vafa, Ha, Yoon, Kirshblum, Steven, Hejrati, Nader; https://orcid.org/0000-0001-8583-9849, Srikandarajah, Nisaharan; https://orcid.org/0000-0001-9578-508X, Quddusi, Ayesha, Moghaddamjou, Ali, Malvea, Anahita, Pinto, Ricardo Rodrigues; https://orcid.org/0000-0002-6903-348X, Marco, Rex A W; https://orcid.org/0000-0003-3393-1672, Newcombe, Virginia F J, Basu, Saumayajit, Strantzas, Samuel, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Douglas, Sam, Laufer, Ilya, Chou, Dean, Saigal, Rajiv, Arnold, Paul M; https://orcid.org/0000-0002-4622-7695, Hawryluk, Gregory W J, Skelly, Andrea C, Kwon, Brian K, Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364, Alvi, Mohammed Ali; https://orcid.org/0000-0002-7131-079X, Evaniew, Nathan; https://orcid.org/0000-0003-1974-5224, Tetreault, Lindsay A, Martin, Allan R; https://orcid.org/0000-0002-9495-5654, McKenna, Stephen L; https://orcid.org/0000-0003-2030-8988, Rahimi-Movaghar, Vafa, Ha, Yoon, Kirshblum, Steven, Hejrati, Nader; https://orcid.org/0000-0001-8583-9849, Srikandarajah, Nisaharan; https://orcid.org/0000-0001-9578-508X, Quddusi, Ayesha, Moghaddamjou, Ali, Malvea, Anahita, Pinto, Ricardo Rodrigues; https://orcid.org/0000-0002-6903-348X, Marco, Rex A W; https://orcid.org/0000-0003-3393-1672, Newcombe, Virginia F J, Basu, Saumayajit, Strantzas, Samuel, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Douglas, Sam, Laufer, Ilya, Chou, Dean, Saigal, Rajiv, Arnold, Paul M; https://orcid.org/0000-0002-4622-7695, Hawryluk, Gregory W J, Skelly, Andrea C, and Kwon, Brian K
- Abstract
STUDY DESIGN Development of a clinical practice guideline following the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) process. OBJECTIVE The objectives of this study were to develop guidelines that outline the utility of intraoperative neuromonitoring (IONM) to detect intraoperative spinal cord injury (ISCI) among patients undergoing spine surgery, to define a subset of patients undergoing spine surgery at higher risk for ISCI and to develop protocols to prevent, diagnose, and manage ISCI. METHODS All systematic reviews were performed according to PRISMA standards and registered on PROSPERO. A multidisciplinary, international Guidelines Development Group (GDG) reviewed and discussed the evidence using GRADE protocols. Consensus was defined by 80% agreement among GDG members. A systematic review and diagnostic test accuracy (DTA) meta-analysis was performed to synthesize pooled evidence on the diagnostic accuracy of IONM to detect ISCI among patients undergoing spinal surgery. The IONM modalities evaluated included somatosensory evoked potentials (SSEPs), motor evoked potentials (MEPs), electromyography (EMG), and multimodal neuromonitoring. Utilizing this knowledge and their clinical experience, the multidisciplinary GDG created recommendations for the use of IONM to identify ISCI in patients undergoing spine surgery. The evidence related to existing care pathways to manage ISCI was summarized and based on this a novel AO Spine-PRAXIS care pathway was created. RESULTS Our recommendations are as follows: (1) We recommend that intraoperative neurophysiological monitoring be employed for high risk patients undergoing spine surgery, and (2) We suggest that patients at "high risk" for ISCI during spine surgery be proactively identified, that after identification of such patients, multi-disciplinary team discussions be undertaken to manage patients, and that an intraoperative protocol including the use of IONM be implemented. A care pathway fo
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- 2024
11. An Update of a Clinical Practice Guideline for the Management of Patients With Acute Spinal Cord Injury: Recommendations on the Role and Timing of Decompressive Surgery
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Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364, Tetreault, Lindsay A, Hachem, Laureen; https://orcid.org/0000-0002-5886-9935, Evaniew, Nathan; https://orcid.org/0000-0003-1974-5224, Ganau, Mario, McKenna, Stephen L; https://orcid.org/0000-0003-2030-8988, Neal, Chris J; https://orcid.org/0000-0002-5072-6454, Nagoshi, Narihito; https://orcid.org/0000-0001-8267-5789, Rahimi-Movaghar, Vafa, Aarabi, Bizhan, Hofstetter, Christoph P, Wengel, Valerie Ter, Nakashima, Hiroaki; https://orcid.org/0000-0002-0039-9678, Martin, Allan R; https://orcid.org/0000-0002-9495-5654, Kirshblum, Steven, Rodrigues Pinto, Ricardo; https://orcid.org/0000-0002-6903-348X, Marco, Rex A W; https://orcid.org/0000-0003-3393-1672, Wilson, Jefferson R; https://orcid.org/0000-0001-5965-0305, Kahn, David E; https://orcid.org/0000-0002-9390-5938, Newcombe, Virginia F J, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Douglas, Sam, Kurpad, Shekar N, Lu, Yi; https://orcid.org/0000-0001-8180-8578, Saigal, Rajiv, Samadani, Uzma, Arnold, Paul M; https://orcid.org/0000-0002-4622-7695, Hawryluk, Gregory W J, Skelly, Andrea C, Kwon, Brian K, Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364, Tetreault, Lindsay A, Hachem, Laureen; https://orcid.org/0000-0002-5886-9935, Evaniew, Nathan; https://orcid.org/0000-0003-1974-5224, Ganau, Mario, McKenna, Stephen L; https://orcid.org/0000-0003-2030-8988, Neal, Chris J; https://orcid.org/0000-0002-5072-6454, Nagoshi, Narihito; https://orcid.org/0000-0001-8267-5789, Rahimi-Movaghar, Vafa, Aarabi, Bizhan, Hofstetter, Christoph P, Wengel, Valerie Ter, Nakashima, Hiroaki; https://orcid.org/0000-0002-0039-9678, Martin, Allan R; https://orcid.org/0000-0002-9495-5654, Kirshblum, Steven, Rodrigues Pinto, Ricardo; https://orcid.org/0000-0002-6903-348X, Marco, Rex A W; https://orcid.org/0000-0003-3393-1672, Wilson, Jefferson R; https://orcid.org/0000-0001-5965-0305, Kahn, David E; https://orcid.org/0000-0002-9390-5938, Newcombe, Virginia F J, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Douglas, Sam, Kurpad, Shekar N, Lu, Yi; https://orcid.org/0000-0001-8180-8578, Saigal, Rajiv, Samadani, Uzma, Arnold, Paul M; https://orcid.org/0000-0002-4622-7695, Hawryluk, Gregory W J, Skelly, Andrea C, and Kwon, Brian K
- Abstract
STUDY DESIGN Clinical practice guideline development. OBJECTIVES Acute spinal cord injury (SCI) can result in devastating motor, sensory, and autonomic impairment; loss of independence; and reduced quality of life. Preclinical evidence suggests that early decompression of the spinal cord may help to limit secondary injury, reduce damage to the neural tissue, and improve functional outcomes. Emerging evidence indicates that "early" surgical decompression completed within 24 hours of injury also improves neurological recovery in patients with acute SCI. The objective of this clinical practice guideline (CPG) is to update the 2017 recommendations on the timing of surgical decompression and to evaluate the evidence with respect to ultra-early surgery (in particular, but not limited to, <12 hours after acute SCI). METHODS A multidisciplinary, international, guideline development group (GDG) was formed that consisted of spine surgeons, neurologists, critical care specialists, emergency medicine doctors, physical medicine and rehabilitation professionals, as well as individuals living with SCI. A systematic review was conducted based on accepted methodological standards to evaluate the impact of early (within 24 hours of acute SCI) or ultra-early (in particular, but not limited to, within 12 hours of acute SCI) surgery on neurological recovery, functional outcomes, administrative outcomes, safety, and cost-effectiveness. The GRADE approach was used to rate the overall strength of evidence across studies for each primary outcome. Using the "evidence-to-recommendation" framework, recommendations were then developed that considered the balance of benefits and harms, financial impact, patient values, acceptability, and feasibility. The guideline was internally appraised using the Appraisal of Guidelines for Research and Evaluation (AGREE) II tool. RESULTS The GDG recommended that early surgery (≤24 hours after injury) be offered as the preferred option for adult patients with
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- 2024
12. A Clinical Practice Guideline for the Management of Patients With Acute Spinal Cord Injury: Recommendations on Hemodynamic Management
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Kwon, Brian K, Tetreault, Lindsay A, Martin, Allan R; https://orcid.org/0000-0002-9495-5654, Arnold, Paul M; https://orcid.org/0000-0002-4622-7695, Marco, Rex A W; https://orcid.org/0000-0003-3393-1672, Newcombe, Virginia F J, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, McKenna, Stephen L; https://orcid.org/0000-0003-2030-8988, Korupolu, Radha, Neal, Chris J; https://orcid.org/0000-0002-5072-6454, Saigal, Rajiv, Glass, Nina E; https://orcid.org/0000-0002-6821-4289, Douglas, Sam, Ganau, Mario, Rahimi-Movaghar, Vafa, Harrop, James S, Aarabi, Bizhan, Wilson, Jefferson R; https://orcid.org/0000-0001-5965-0305, Evaniew, Nathan; https://orcid.org/0000-0003-1974-5224, Skelly, Andrea C, Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364, Kwon, Brian K, Tetreault, Lindsay A, Martin, Allan R; https://orcid.org/0000-0002-9495-5654, Arnold, Paul M; https://orcid.org/0000-0002-4622-7695, Marco, Rex A W; https://orcid.org/0000-0003-3393-1672, Newcombe, Virginia F J, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, McKenna, Stephen L; https://orcid.org/0000-0003-2030-8988, Korupolu, Radha, Neal, Chris J; https://orcid.org/0000-0002-5072-6454, Saigal, Rajiv, Glass, Nina E; https://orcid.org/0000-0002-6821-4289, Douglas, Sam, Ganau, Mario, Rahimi-Movaghar, Vafa, Harrop, James S, Aarabi, Bizhan, Wilson, Jefferson R; https://orcid.org/0000-0001-5965-0305, Evaniew, Nathan; https://orcid.org/0000-0003-1974-5224, Skelly, Andrea C, and Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364
- Abstract
STUDY DESIGN Clinical practice guideline development following the GRADE process. OBJECTIVES Hemodynamic management is one of the only available treatment options that likely improves neurologic outcomes in patients with acute traumatic spinal cord injury (SCI). Augmenting mean arterial pressure (MAP) aims to improve blood perfusion and oxygen delivery to the injured spinal cord in order to minimize secondary ischemic damage to neural tissue. The objective of this guideline was to update the 2013 AANS/CNS recommendations on the hemodynamic management of patients with acute traumatic SCI, acknowledging that much has been published in this area since its publication. Specifically, we sought to make recommendations on 1. The range of mean arterial pressure (MAP) to be maintained by identifying an upper and lower MAP limit; 2. The duration of such MAP augmentation; and 3. The choice of vasopressor. Additionally, we sought to make a recommendation on spinal cord perfusion pressure (SCPP) targets. METHODS A multidisciplinary guideline development group (GDG) was formed that included health care professionals from a wide range of clinical specialities, patient advocates, and individuals living with SCI. The GDG reviewed the 2013 AANS/CNS guidelines and voted on whether each recommendation should be endorsed or updated. A systematic review of the literature, following PRISMA standards and registered in PROSPERO, was conducted to inform the guideline development process and address the following key questions: (i) what are the effects of goal-directed interventions to optimize spinal cord perfusion on extent of neurological recovery and rates of adverse events at any time point of follow-up? and (ii) what are the effects of particular monitoring techniques, perfusion ranges, pharmacological agents, and durations of treatment on extent of neurological recovery and rates of adverse events at any time point of follow-up? The GDG combined the information from this systematic rev
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- 2024
13. Potential thresholds of critically increased cardiac-related spinal cord motion in degenerative cervical myelopathy.
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Pfender, Nikolai, Jutzeler, Catherine R., Hubli, Michèle, Scheuren, Paulina S., Pfyffer, Dario, Zipser, Carl M., Rosner, Jan, Friedl, Susanne, Sutter, Reto, Spirig, José M., Betz, Michael, Schubert, Martin, Seif, Maryam, Freund, Patrick, Farshad, Mazda, Curt, Armin, and Hupp, Markus
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SPINAL cord ,SPINAL cord diseases ,PHASE contrast magnetic resonance imaging ,SPINAL stenosis ,RECEIVER operating characteristic curves ,MYELOGRAPHY - Abstract
Introduction: New diagnostic techniques are a substantial research focus in degenerative cervical myelopathy (DCM). This cross-sectional study determined the significance of cardiac-related spinal cord motion and the extent of spinal stenosis as indicators of mechanical strain on the cord. Methods: Eighty-four DCM patients underwent MRI/clinical assessments and were classified as MRI+ [T2-weighted (T2w) hyperintense lesion in MRI] or MRI-(no T2w-hyperintense lesion). Cord motion (displacement assessed by phasecontrast MRI) and spinal stenosis [adapted spinal canal occupation ratio (aSCOR)] were related to neurological (sensory/motor) and neurophysiological readouts [contact heat evoked potentials (CHEPs)] by receiver operating characteristic (ROC) analysis. Results: MRI+ patients (N = 31; 36.9%) were more impaired compared to MRI-patients (N = 53; 63.1%) based on the modified Japanese Orthopedic Association (mJOA) subscores for upper {MRI+ [median (Interquartile range)]: 4 (4-5); MRI-: 5 (5-5); p < 0.01} and lower extremity [MRI+: 6 (6-7); MRI-: 7 (6-7); p = 0.03] motor dysfunction and the monofilament score [MRI+: 21 (18-23); MRI-: 24 (22-24); p < 0.01]. Both patient groups showed similar extent of cord motion and stenosis. Only in the MRI-group displacement identified patients with pathologic assessments [trunk/lower extremity pin prick score (T/LEPP): AUC = 0.67, p = 0.03; CHEPs: AUC = 0.73, p = 0.01]. Cord motion thresholds: T/LEPP: 1.67 mm (sensitivity 84.6%, specificity 52.5%); CHEPs: 1.96 mm (sensitivity 83.3%, specificity 65.6%). The aSCOR failed to show any relation to the clinical assessments. Discussion: These findings affirm cord motion measurements as a promising additional biomarker to improve the clinical workup and to enable timely surgical treatment particularly in MRI-DCM patients. [ABSTRACT FROM AUTHOR]
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- 2024
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14. Short-interval and long-interval intracortical inhibition of TMS-evoked EEG potentials
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Premoli, Isabella, Király, Julia, Müller-Dahlhaus, Florian, Zipser, Carl M., Rossini, Pierre, Zrenner, Christoph, Ziemann, Ulf, and Belardinelli, Paolo
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- 2018
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15. Phenylalanine effects on brain function in adult phenylketonuria
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Pilotto, Andrea, Zipser, Carl M., Leks, Edytha, Haas, Dorothea, Gramer, Gwendolyn, Freisinger, Peter, Schaeffer, Eva, Liepelt-Scarfone, Inga, Brockmann, Kathrin, Maetzler, Walter, Schulte, Claudia, Deuschle, Christian, Hauser, Ann Kathrin, Hoffmann, Georg F., Scheffler, Klaus, van Spronsen, Francjan J., Padovani, Alessandro, Trefz, Friedrich, and Berg, Daniela
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- 2020
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16. Cerebrospinal Fluid Pressure Dynamics as a Bedside Test in Traumatic Spinal Cord Injury to Assess Surgical Spinal Cord Decompression: Safety, Feasibility, and Proof-of-Concept
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Kheram, Najmeh, Boraschi, Andrea, Pfender, Nikolai, Friedl, Susanne Gabriele, Rasenack, Maria, Fritz, Benjamin, Kurtcuoglu, Vartan, Schubert, Martin, Curt, Armin, Zipser, Carl M, and University of Zurich
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spine surgery ,cerebrospinal fluid pressure ,spinal cord compression ,610 Medicine & health ,10046 Balgrist University Hospital, Swiss Spinal Cord Injury Center ,craniospinal compliance ,General Medicine ,spinal cord injury ,10052 Institute of Physiology ,compression biomarker - Abstract
Background Sufficient and timely spinal cord decompression is a critical surgical objective for neurological recovery in spinal cord injury (SCI). Residual cord compression may be associated with disturbed cerebrospinal fluid pressure (CSFP) dynamics. Objectives This study aims to assess whether intrathecal CSFP dynamics in SCI following surgical decompression are feasible and safe, and to explore the diagnostic utility. Methods Prospective cohort study. Bedside lumbar CSFP dynamics and cervical MRI were obtained following surgical decompression in N = 9 with mostly cervical acute-subacute SCI and N = 2 patients with non-traumatic SCI. CSFP measurements included mean CSFP, cardiac-driven CSFP peak-to-valley amplitudes (CSFPp), Valsalva maneuver, and Queckenstedt’s test (firm pressure on jugular veins, QT). From QT, proxies for cerebrospinal fluid pulsatility curve were calculated (ie, relative pulse pressure coefficient; RPPC-Q). CSFP metrics were compared to spine-healthy patients. computer tomography (CT)-myelography was done in 3/8 simultaneous to CSFP measurements. Results Mean age was 45 ± 9 years (range 17-67; 3F), SCI was complete (AIS A, N = 5) or incomplete (AIS B-D, N = 6). No adverse events related to CSFP assessments. CSFP rise during QT was induced in all patients [range 9.6-26.6 mmHg]. However, CSFPp was reduced in 3/11 (0.1-0.3 mmHg), and in 3/11 RPPC-Q was abnormal (0.01-0.05). Valsalva response was reduced in 8/11 (2.6-23.4 mmHg). CSFP dynamics corresponded to CT-myelography. Conclusions Comprehensive bedside lumbar CSFP dynamics in SCI following decompression are safe, feasible, and can reveal distinct patterns of residual spinal cord compression. Longitudinal studies are required to define critical thresholds of impaired CSFP dynamics that may impact neurological recovery and requiring surgical revisions.
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- 2023
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17. Increased cranio-caudal spinal cord oscillations are the cardinal pathophysiological change in degenerative cervical myelopathy
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Pfender, Nikolai, primary, Rosner, Jan, additional, Zipser, Carl M., additional, Friedl, Susanne, additional, Schubert, Martin, additional, Sutter, Reto, additional, Klarhoefer, Markus, additional, Spirig, José M., additional, Betz, Michael, additional, Freund, Patrick, additional, Farshad, Mazda, additional, Curt, Armin, additional, and Hupp, Markus, additional
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- 2023
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18. Toward Shared Decision-Making in Degenerative Cervical Myelopathy: Protocol for a Mixed Methods Study
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Sangeorzan, Irina, primary, Antonacci, Grazia, additional, Martin, Anne, additional, Grodzinski, Ben, additional, Zipser, Carl M, additional, Murphy, Rory K J, additional, Andriopoulou, Panoraia, additional, Cook, Chad E, additional, Anderson, David B, additional, Guest, James, additional, Furlan, Julio C, additional, Kotter, Mark R N, additional, Boerger, Timothy F, additional, Sadler, Iwan, additional, Roberts, Elizabeth A, additional, Wood, Helen, additional, Fraser, Christine, additional, Fehlings, Michael G, additional, Kumar, Vishal, additional, Jung, Josephine, additional, Milligan, James, additional, Nouri, Aria, additional, Martin, Allan R, additional, Blizzard, Tammy, additional, Vialle, Luiz Roberto, additional, Tetreault, Lindsay, additional, Kalsi-Ryan, Sukhvinder, additional, MacDowall, Anna, additional, Martin-Moore, Esther, additional, Burwood, Martin, additional, Wood, Lianne, additional, Lalkhen, Abdul, additional, Ito, Manabu, additional, Wilson, Nicky, additional, Treanor, Caroline, additional, Dugan, Sheila, additional, and Davies, Benjamin M, additional
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- 2023
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19. An Update of a Clinical Practice Guideline for the Management of Patients With Acute Spinal Cord Injury: Recommendations on the Role and Timing of Decompressive Surgery
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Fehlings, Michael G., Kwon, Brian K., Evaniew, Nathan, Tetreault, Lindsay A., Fehlings, Michael G., Tetreault, Lindsay A., Hachem, Laureen, Evaniew, Nathan, Ganau, Mario, McKenna, Stephen L., Neal, Chris J., Nagoshi, Narihito, Rahimi-Movaghar, Vafa, Aarabi, Bizhan, Hofstetter, Christoph P., Wengel, Valerie ter, Nakashima, Hiroaki, Martin, Allan R., Kirshblum, Steven, Rodrigues Pinto, Ricardo, Marco, Rex A. W., Wilson, Jefferson R., Kahn, David E., Newcombe, Virginia F. J., Zipser, Carl M., Douglas, Sam, Kurpad, Shekar N., Lu, Yi, Saigal, Rajiv, Samadani, Uzma, Arnold, Paul M., Hawryluk, Gregory W. J., Skelly, Andrea C., and Kwon, Brian K.
- Abstract
Study Design Clinical practice guideline development.Objectives Acute spinal cord injury (SCI) can result in devastating motor, sensory, and autonomic impairment; loss of independence; and reduced quality of life. Preclinical evidence suggests that early decompression of the spinal cord may help to limit secondary injury, reduce damage to the neural tissue, and improve functional outcomes. Emerging evidence indicates that “early” surgical decompression completed within 24 hours of injury also improves neurological recovery in patients with acute SCI. The objective of this clinical practice guideline (CPG) is to update the 2017 recommendations on the timing of surgical decompression and to evaluate the evidence with respect to ultra-early surgery (in particular, but not limited to, <12 hours after acute SCI).Methods A multidisciplinary, international, guideline development group (GDG) was formed that consisted of spine surgeons, neurologists, critical care specialists, emergency medicine doctors, physical medicine and rehabilitation professionals, as well as individuals living with SCI. A systematic review was conducted based on accepted methodological standards to evaluate the impact of early (within 24 hours of acute SCI) or ultra-early (in particular, but not limited to, within 12 hours of acute SCI) surgery on neurological recovery, functional outcomes, administrative outcomes, safety, and cost-effectiveness. The GRADE approach was used to rate the overall strength of evidence across studies for each primary outcome. Using the “evidence-to-recommendation” framework, recommendations were then developed that considered the balance of benefits and harms, financial impact, patient values, acceptability, and feasibility. The guideline was internally appraised using the Appraisal of Guidelines for Research and Evaluation (AGREE) II tool.Results The GDG recommended that early surgery (≤24 hours after injury) be offered as the preferred option for adult patients with acute SCI regardless of level. This recommendation was based on moderate evidence suggesting that patients were 2 times more likely to recover by ≥ 2 ASIA Impairment Score (AIS) grades at 6 months (RR: 2.76, 95% CI 1.60 to 4.98) and 12 months (RR: 1.95, 95% CI 1.26 to 3.18) if they were decompressed within 24 hours compared to after 24 hours. Furthermore, patients undergoing early surgery improved by an additional 4.50 (95% 1.70 to 7.29) points on the ASIA Motor Score compared to patients undergoing surgery after 24 hours post-injury. The GDG also agreed that a recommendation for ultra-early surgery could not be made on the basis of the current evidence because of the small sample sizes, variable definitions of what constituted ultra-early in the literature, and the inconsistency of the evidence.Conclusions It is recommended that patients with an acute SCI, regardless of level, undergo surgery within 24 hours after injury when medically feasible. Future research is required to determine the differential effectiveness of early surgery in different subpopulations and the impact of ultra-early surgery on neurological recovery. Moreover, further work is required to define what constitutes effective spinal cord decompression and to individualize care. It is also recognized that a concerted international effort will be required to translate these recommendations into policy.
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- 2024
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20. A Clinical Practice Guideline for Prevention, Diagnosis and Management of Intraoperative Spinal Cord Injury: Recommendations for Use of Intraoperative Neuromonitoring and for the Use of Preoperative and Intraoperative Protocols for Patients Undergoing Spine Surgery
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Fehlings, Michael G., Kwon, Brian K., Evaniew, Nathan, Tetreault, Lindsay A., Fehlings, Michael G., Alvi, Mohammed Ali, Evaniew, Nathan, Tetreault, Lindsay A., Martin, Allan R., McKenna, Stephen L., Rahimi-Movaghar, Vafa, Ha, Yoon, Kirshblum, Steven, Hejrati, Nader, Srikandarajah, Nisaharan, Quddusi, Ayesha, Moghaddamjou, Ali, Malvea, Anahita, Pinto, Ricardo Rodrigues, Marco, Rex A. W., Newcombe, Virginia F. J., Basu, Saumayajit, Strantzas, Samuel, Zipser, Carl M., Douglas, Sam, Laufer, Ilya, Chou, Dean, Saigal, Rajiv, Arnold, Paul M., Hawryluk, Gregory W. J., Skelly, Andrea C., and Kwon, Brian K.
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Study Design Development of a clinical practice guideline following the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) process.Objective The objectives of this study were to develop guidelines that outline the utility of intraoperative neuromonitoring (IONM) to detect intraoperative spinal cord injury (ISCI) among patients undergoing spine surgery, to define a subset of patients undergoing spine surgery at higher risk for ISCI and to develop protocols to prevent, diagnose, and manage ISCI.Methods All systematic reviews were performed according to PRISMA standards and registered on PROSPERO. A multidisciplinary, international Guidelines Development Group (GDG) reviewed and discussed the evidence using GRADE protocols. Consensus was defined by 80% agreement among GDG members. A systematic review and diagnostic test accuracy (DTA) meta-analysis was performed to synthesize pooled evidence on the diagnostic accuracy of IONM to detect ISCI among patients undergoing spinal surgery. The IONM modalities evaluated included somatosensory evoked potentials (SSEPs), motor evoked potentials (MEPs), electromyography (EMG), and multimodal neuromonitoring. Utilizing this knowledge and their clinical experience, the multidisciplinary GDG created recommendations for the use of IONM to identify ISCI in patients undergoing spine surgery. The evidence related to existing care pathways to manage ISCI was summarized and based on this a novel AO Spine-PRAXIS care pathway was created.Results Our recommendations are as follows: (1) We recommend that intraoperative neurophysiological monitoring be employed for high risk patients undergoing spine surgery, and (2) We suggest that patients at “high risk” for ISCI during spine surgery be proactively identified, that after identification of such patients, multi-disciplinary team discussions be undertaken to manage patients, and that an intraoperative protocol including the use of IONM be implemented. A care pathway for the prevention, diagnosis, and management of ISCI has been developed by the GDG.Conclusion We anticipate that these guidelines will promote the use of IONM to detect and manage ISCI, and promote the use of preoperative and intraoperative checklists by surgeons and other team members for high risk patients undergoing spine surgery. We welcome teams to implement and evaluate the care pathway created by our GDG.
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- 2024
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21. A Clinical Practice Guideline for the Management of Patients With Acute Spinal Cord Injury: Recommendations on Hemodynamic Management
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Fehlings, Michael G., Kwon, Brian K., Evaniew, Nathan, Tetreault, Lindsay A., Kwon, Brian K., Tetreault, Lindsay A., Martin, Allan R., Arnold, Paul M., Marco, Rex A.W., Newcombe, Virginia F.J., Zipser, Carl M., McKenna, Stephen L., Korupolu, Radha, Neal, Chris J., Saigal, Rajiv, Glass, Nina E., Douglas, Sam, Ganau, Mario, Rahimi-Movaghar, Vafa, Harrop, James S., Aarabi, Bizhan, Wilson, Jefferson R., Evaniew, Nathan, Skelly, Andrea C., and Fehlings, Michael G.
- Abstract
Study Design Clinical practice guideline development following the GRADE process.Objectives Hemodynamic management is one of the only available treatment options that likely improves neurologic outcomes in patients with acute traumatic spinal cord injury (SCI). Augmenting mean arterial pressure (MAP) aims to improve blood perfusion and oxygen delivery to the injured spinal cord in order to minimize secondary ischemic damage to neural tissue. The objective of this guideline was to update the 2013 AANS/CNS recommendations on the hemodynamic management of patients with acute traumatic SCI, acknowledging that much has been published in this area since its publication. Specifically, we sought to make recommendations on 1. The range of mean arterial pressure (MAP) to be maintained by identifying an upper and lower MAP limit; 2. The duration of such MAP augmentation; and 3. The choice of vasopressor. Additionally, we sought to make a recommendation on spinal cord perfusion pressure (SCPP) targets.Methods A multidisciplinary guideline development group (GDG) was formed that included health care professionals from a wide range of clinical specialities, patient advocates, and individuals living with SCI. The GDG reviewed the 2013 AANS/CNS guidelines and voted on whether each recommendation should be endorsed or updated. A systematic review of the literature, following PRISMA standards and registered in PROSPERO, was conducted to inform the guideline development process and address the following key questions: (i) what are the effects of goal-directed interventions to optimize spinal cord perfusion on extent of neurological recovery and rates of adverse events at any time point of follow-up? and (ii) what are the effects of particular monitoring techniques, perfusion ranges, pharmacological agents, and durations of treatment on extent of neurological recovery and rates of adverse events at any time point of follow-up? The GDG combined the information from this systematic review with their clinical expertise in order to develop recommendations on a MAP target range (specifically an upper and lower limit to target), the optimal duration for MAP augmentation, and the use of vasopressors or inotropes. Using methods outlined by the GRADE working group, recommendations were formulated that considered the balance of benefits and harms, financial impact, acceptability, feasibility and patient preferences.Results The GDG suggested that MAP should be augmented to at least 75-80 mmHg as the “lower limit,” but not actively augmented beyond an “upper limit” of 90-95 mmHg in order to optimize spinal cord perfusion in acute traumatic SCI. The quality of the evidence around the “target MAP” was very low, and thus the strength of this recommendation is weak. For duration of hemodynamic management, the GDG “suggested” that MAP be augmented for a duration of 3-7 days. Again, the quality of the evidence around the duration of MAP support was very low, and thus the strength of this recommendation is also weak. The GDG felt that a recommendation on the choice of vasopressor or the use of SCPP targets was not warranted, given the dearth of available evidence.Conclusion We provide new recommendations for blood pressure management after acute SCI that acknowledge the limitations of the current evidence on the relationship between MAP and neurologic recovery. It was felt that the low quality of existing evidence and uncertainty around the relationship between MAP and neurologic recovery justified a greater range of MAP to target, and for a broader range of days post-injury than recommended in previous guidelines. While important knowledge gaps still remain regarding hemodynamic management, these recommendations represent current perspectives on the role of MAP augmentation for acute SCI.
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- 2024
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22. Toward Shared Decision-Making in Degenerative Cervical Myelopathy : Protocol for a Mixed Methods Study
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Sangeorzan, Irina, Antonacci, Grazia, Martin, Anne, Grodzinski, Ben, Zipser, Carl M., Murphy, Rory K. J., Andriopoulou, Panoraia, Cook, Chad E., Anderson, David B., Guest, James, Furlan, Julio C., Kotter, Mark R. N., Boerger, Timothy F., Sadler, Iwan, Roberts, Elizabeth A., Wood, Helen, Fraser, Christine, Fehlings, Michael G., Kumar, Vishal, Jung, Josephine, Milligan, James, Nouri, Aria, Martin, Allan R., Blizzard, Tammy, Vialle, Luiz Roberto, Tetreault, Lindsay, Kalsi-Ryan, Sukhvinder, MacDowall, Anna, Martin-Moore, Esther, Burwood, Martin, Wood, Lianne, Lalkhen, Abdul, Ito, Manabu, Wilson, Nicky, Treanor, Caroline, Dugan, Sheila, Davies, Benjamin M., Sangeorzan, Irina, Antonacci, Grazia, Martin, Anne, Grodzinski, Ben, Zipser, Carl M., Murphy, Rory K. J., Andriopoulou, Panoraia, Cook, Chad E., Anderson, David B., Guest, James, Furlan, Julio C., Kotter, Mark R. N., Boerger, Timothy F., Sadler, Iwan, Roberts, Elizabeth A., Wood, Helen, Fraser, Christine, Fehlings, Michael G., Kumar, Vishal, Jung, Josephine, Milligan, James, Nouri, Aria, Martin, Allan R., Blizzard, Tammy, Vialle, Luiz Roberto, Tetreault, Lindsay, Kalsi-Ryan, Sukhvinder, MacDowall, Anna, Martin-Moore, Esther, Burwood, Martin, Wood, Lianne, Lalkhen, Abdul, Ito, Manabu, Wilson, Nicky, Treanor, Caroline, Dugan, Sheila, and Davies, Benjamin M.
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Background: Health care decisions are a critical determinant in the evolution of chronic illness. In shared decision-making (SDM), patients and clinicians work collaboratively to reach evidence-based health decisions that align with individual circumstances, values, and preferences. This personalized approach to clinical care likely has substantial benefits in the oversight of degenerative cervical myelopathy (DCM), a type of nontraumatic spinal cord injury. Its chronicity, heterogeneous clinical presentation, complex management, and variable disease course engenders an imperative for a patient-centric approach that accounts for each patient's unique needs and priorities. Inadequate patient knowledge about the condition and an incomplete understanding of the critical decision points that arise during the course of care currently hinder the fruitful participation of health care providers and patients in SDM. This study protocol presents the rationale for deploying SDM for DCM and delineates the groundwork required to achieve this. Objective: The study's primary outcome is the development of a comprehensive checklist to be implemented upon diagnosis that provides patients with essential information necessary to support their informed decision-making. This is known as a core information set (CIS). The secondary outcome is the creation of a detailed process map that provides a diagrammatic representation of the global care workflows and cognitive processes involved in DCM care. Characterizing the critical decision points along a patient's journey will allow for an effective exploration of SDM tools for routine clinical practice to enhance patient-centered care and improve clinical outcomes. Methods: Both CISs and process maps are coproduced iteratively through a collaborative process involving the input and consensus of key stakeholders. This will be facilitated by Myelopathy.org, a global DCM charity, through its Research Objectives and Common Data Elements for Degener
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- 2023
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23. Intraoperative monitoring of Cerebrospinal Fluid Pressure Dynamics as a Biomarker for Spinal Cord Decompression
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Zipser, Carl M; https://orcid.org/0000-0002-4396-4796 and Zipser, Carl M; https://orcid.org/0000-0002-4396-4796
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- 2023
24. Toward Shared Decision-Making in Degenerative Cervical Myelopathy: Protocol for a Mixed Methods Study
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Sangeorzan, Irina; https://orcid.org/0000-0002-2170-2218, Antonacci, Grazia; https://orcid.org/0000-0001-7742-8003, Martin, Anne; https://orcid.org/0000-0003-4225-6998, Grodzinski, Ben; https://orcid.org/0000-0001-8839-4718, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Murphy, Rory K J; https://orcid.org/0000-0001-9634-1253, Andriopoulou, Panoraia; https://orcid.org/0000-0002-5745-6741, Cook, Chad E; https://orcid.org/0000-0001-8622-8361, Anderson, David B; https://orcid.org/0000-0001-7104-122X, Guest, James; https://orcid.org/0000-0003-0931-0286, Furlan, Julio C; https://orcid.org/0000-0002-2038-0018, Kotter, Mark R N; https://orcid.org/0000-0001-5145-7199, Boerger, Timothy F; https://orcid.org/0000-0003-1587-3704, Sadler, Iwan; https://orcid.org/0000-0002-8696-1122, Roberts, Elizabeth A; https://orcid.org/0000-0003-2738-4203, Wood, Helen; https://orcid.org/0000-0001-6976-4736, Fraser, Christine; https://orcid.org/0000-0001-9519-6170, Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364, Kumar, Vishal; https://orcid.org/0000-0002-6707-4560, Jung, Josephine; https://orcid.org/0000-0002-0056-440X, Milligan, James; https://orcid.org/0000-0003-3387-1614, Nouri, Aria; https://orcid.org/0000-0002-4965-3059, Martin, Allan R; https://orcid.org/0000-0002-9495-5654, Blizzard, Tammy; https://orcid.org/0000-0002-0335-9612, Vialle, Luiz Roberto; https://orcid.org/0000-0002-0638-4311, Tetreault, Lindsay; https://orcid.org/0000-0001-8435-4292, Kalsi-Ryan, Sukhvinder; https://orcid.org/0000-0003-2332-5986, MacDowall, Anna; https://orcid.org/0000-0002-9231-7608, Martin-Moore, Esther; https://orcid.org/0000-0002-6151-3040, Burwood, Martin; https://orcid.org/0000-0003-0339-1011, et al, Sangeorzan, Irina; https://orcid.org/0000-0002-2170-2218, Antonacci, Grazia; https://orcid.org/0000-0001-7742-8003, Martin, Anne; https://orcid.org/0000-0003-4225-6998, Grodzinski, Ben; https://orcid.org/0000-0001-8839-4718, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Murphy, Rory K J; https://orcid.org/0000-0001-9634-1253, Andriopoulou, Panoraia; https://orcid.org/0000-0002-5745-6741, Cook, Chad E; https://orcid.org/0000-0001-8622-8361, Anderson, David B; https://orcid.org/0000-0001-7104-122X, Guest, James; https://orcid.org/0000-0003-0931-0286, Furlan, Julio C; https://orcid.org/0000-0002-2038-0018, Kotter, Mark R N; https://orcid.org/0000-0001-5145-7199, Boerger, Timothy F; https://orcid.org/0000-0003-1587-3704, Sadler, Iwan; https://orcid.org/0000-0002-8696-1122, Roberts, Elizabeth A; https://orcid.org/0000-0003-2738-4203, Wood, Helen; https://orcid.org/0000-0001-6976-4736, Fraser, Christine; https://orcid.org/0000-0001-9519-6170, Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364, Kumar, Vishal; https://orcid.org/0000-0002-6707-4560, Jung, Josephine; https://orcid.org/0000-0002-0056-440X, Milligan, James; https://orcid.org/0000-0003-3387-1614, Nouri, Aria; https://orcid.org/0000-0002-4965-3059, Martin, Allan R; https://orcid.org/0000-0002-9495-5654, Blizzard, Tammy; https://orcid.org/0000-0002-0335-9612, Vialle, Luiz Roberto; https://orcid.org/0000-0002-0638-4311, Tetreault, Lindsay; https://orcid.org/0000-0001-8435-4292, Kalsi-Ryan, Sukhvinder; https://orcid.org/0000-0003-2332-5986, MacDowall, Anna; https://orcid.org/0000-0002-9231-7608, Martin-Moore, Esther; https://orcid.org/0000-0002-6151-3040, Burwood, Martin; https://orcid.org/0000-0003-0339-1011, and et al
- Abstract
BACKGROUND Health care decisions are a critical determinant in the evolution of chronic illness. In shared decision-making (SDM), patients and clinicians work collaboratively to reach evidence-based health decisions that align with individual circumstances, values, and preferences. This personalized approach to clinical care likely has substantial benefits in the oversight of degenerative cervical myelopathy (DCM), a type of nontraumatic spinal cord injury. Its chronicity, heterogeneous clinical presentation, complex management, and variable disease course engenders an imperative for a patient-centric approach that accounts for each patient's unique needs and priorities. Inadequate patient knowledge about the condition and an incomplete understanding of the critical decision points that arise during the course of care currently hinder the fruitful participation of health care providers and patients in SDM. This study protocol presents the rationale for deploying SDM for DCM and delineates the groundwork required to achieve this. OBJECTIVE The study's primary outcome is the development of a comprehensive checklist to be implemented upon diagnosis that provides patients with essential information necessary to support their informed decision-making. This is known as a core information set (CIS). The secondary outcome is the creation of a detailed process map that provides a diagrammatic representation of the global care workflows and cognitive processes involved in DCM care. Characterizing the critical decision points along a patient's journey will allow for an effective exploration of SDM tools for routine clinical practice to enhance patient-centered care and improve clinical outcomes. METHODS Both CISs and process maps are coproduced iteratively through a collaborative process involving the input and consensus of key stakeholders. This will be facilitated by Myelopathy.org, a global DCM charity, through its Research Objectives and Common Data Elements for Degenerati
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- 2023
25. Increased cranio-caudal spinal cord oscillations are the cardinal pathophysiological change in degenerative cervical myelopathy
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Pfender, Nikolai, Rosner, Jan, Zipser, Carl M, Friedl, Susanne, Schubert, Martin, Sutter, Reto, Klarhoefer, Markus, Spirig, José M, Betz, Michael, Freund, Patrick, Farshad, Mazda, Curt, Armin, Hupp, Markus, Pfender, Nikolai, Rosner, Jan, Zipser, Carl M, Friedl, Susanne, Schubert, Martin, Sutter, Reto, Klarhoefer, Markus, Spirig, José M, Betz, Michael, Freund, Patrick, Farshad, Mazda, Curt, Armin, and Hupp, Markus
- Abstract
INTRODUCTION Degenerative cervical myelopathy (DCM) is the most common cause of non-traumatic incomplete spinal cord injury, but its pathophysiology is poorly understood. As spinal cord compression observed in standard MRI often fails to explain a patient's status, new diagnostic techniques to assess DCM are one of the research priorities. Minor cardiac-related cranio-caudal oscillations of the cervical spinal cord are observed by phase-contrast MRI (PC-MRI) in healthy controls (HCs), while they become pathologically increased in patients suffering from degenerative cervical myelopathy. Whether transversal oscillations (i.e., anterior-posterior and right-left) also change in DCM patients is not known. METHODS We assessed spinal cord motion simultaneously in all three spatial directions (i.e., cranio-caudal, anterior-posterior, and right-left) using sagittal PC-MRI and compared physiological oscillations in 18 HCs to pathological changes in 72 DCM patients with spinal canal stenosis. The parameter of interest was the amplitude of the velocity signal (i.e., maximum positive to maximum negative peak) during the cardiac cycle. RESULTS Most patients suffered from mild DCM (mJOA score 16 (14-18) points), and the majority (68.1%) presented with multisegmental stenosis. The spinal canal was considerably constricted in DCM patients in all segments compared to HCs. Under physiological conditions in HCs, the cervical spinal cord oscillates in the cranio-caudal and anterior-posterior directions, while right-left motion was marginal [e.g., segment C5 amplitudes: cranio-caudal: 0.40 (0.27-0.48) cm/s; anterior-posterior: 0.18 (0.16-0.29) cm/s; right-left: 0.10 (0.08-0.13) cm/s]. Compared to HCs, DCM patients presented with considerably increased cranio-caudal oscillations due to the cardinal pathophysiologic change in non-stenotic [e.g., segment C5 amplitudes: 0.79 (0.49-1.32) cm/s] and stenotic segments [.g., segment C5 amplitudes: 0.99 (0.69-1.42) cm/s]). In contrast, right-left
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- 2023
26. Role of Frailty Status in Prediction of Clinical Outcomes of Traumatic Spinal Injury: A Systematic Review and Meta-Analysis.
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Rohollahi, Faramarz, Farahbakhsh, Farzin, Kankam, Samuel Berchi, Mohammadi, Mohammad, Mohammadi, Aynaz, Korkorian, Rojin, Hobabi, Sepehr, Moarrefdezfouli, Azin, Molavi, Shervin, Davies, Benjamin M., Zipser, Carl M., Laufer, Ilya, Harrop, James, Arnold, Paul M., Martin, Allan R., and Rahimi-Movaghar, Vafa
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- 2023
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27. Toward Shared Decision-Making in Degenerative Cervical Myelopathy: Protocol for a Mixed Methods Study (Preprint)
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Sangeorzan, Irina, primary, Antonacci, Grazia, additional, Martin, Anne, additional, Grodzinski, Ben, additional, Zipser, Carl M, additional, Murphy, Rory K J, additional, Andriopoulou, Panoraia, additional, Cook, Chad E, additional, Anderson, David B, additional, Guest, James, additional, Furlan, Julio C, additional, Kotter, Mark R N, additional, Boerger, Timothy F, additional, Sadler, Iwan, additional, Roberts, Elizabeth A, additional, Wood, Helen, additional, Fraser, Christine, additional, Fehlings, Michael G, additional, Kumar, Vishal, additional, Jung, Josephine, additional, Milligan, James, additional, Nouri, Aria, additional, Martin, Allan R, additional, Blizzard, Tammy, additional, Vialle, Luiz Roberto, additional, Tetreault, Lindsay, additional, Kalsi-Ryan, Sukhvinder, additional, MacDowall, Anna, additional, Martin-Moore, Esther, additional, Burwood, Martin, additional, Wood, Lianne, additional, Lalkhen, Abdul, additional, Ito, Manabu, additional, Wilson, Nicky, additional, Treanor, Caroline, additional, Dugan, Sheila, additional, and Davies, Benjamin M, additional
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- 2023
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28. Chapter 7 - Neurophysiology and advanced dynamic assessments in degenerative cervical myelopathy
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Scheuren, Paulina S., Zipser, Carl M., Hupp, Markus, Rosner, Jan, Pfender, Nikolai, Schubert, Martin, Hubli, Michèle, and Curt, Armin
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- 2023
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29. Sex-specific clinical characteristics and treatment responses in delirium management: findings from a prospective cohort study in elderly patients.
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Hildenbrand, Florian F., Boettger, Soenke, Spiller, Tobias, Schubert, Maria, Ernst, Jutta, von Känel, Roland, and Zipser, Carl M.
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- 2023
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30. Update zum Delir: Risikofaktoren, Management und Biomarker.
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Zipser, Carl M., von Känel, Roland, and Boettger, Soenke
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INTENSIVE care units , *COGNITION disorders , *DELIRIUM , *PALLIATIVE treatment , *UNIVERSITY hospitals - Abstract
A delirium can be encountered in almost all hospital sectors. The prevalence varies between 20 and 40 % in internal medicine and surgical wards and between 50 and 60 % in palliative care and intensive care units. A delirium is characterized by impaired attention, consciousness, and cognitive impairment with acute onset and fluctuating course. People with delirium have inferior clinical outcomes, including higher mortality and more need for long-term care after discharge. This article first reviews the clinical and pathophysiologic basis of delirium, followed by a detailed description of individual risk profiles based on a prospective, hospital-wide cohort study (Delir-Path) conducted at the University Hospital Zurich. We will then give a brief update on diagnosis and management of delirium and an outlook on how neurophysiology and blood biomarkers can complement delirium care in the future. [ABSTRACT FROM AUTHOR]
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- 2023
31. Cerebrospinal fluid pressure dynamics reveal signs of effective spinal canal narrowing in ambiguous spine conditions
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Kheram, Najmeh, Pfender, Nikolai, Boraschi, Andrea, Farshad, Mazda, Kurtcuoglu, Vartan, Curt, Armin, Schubert, Martin, Zipser, Carl M, University of Zurich, and Zipser, Carl M
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2728 Neurology (clinical) ,Neurology ,2808 Neurology ,610 Medicine & health ,10046 Balgrist University Hospital, Swiss Spinal Cord Injury Center ,Neurology (clinical) ,10052 Institute of Physiology - Published
- 2022
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32. Predisposing and precipitating risk factors for delirium in gastroenterology and hepatology: Subgroup analysis of 718 patients from a hospital-wide prospective cohort study
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Hildenbrand, Florian F., primary, Murray, Fritz R., additional, von Känel, Roland, additional, Deibel, Ansgar R., additional, Schreiner, Philipp, additional, Ernst, Jutta, additional, Zipser, Carl M., additional, and Böettger, Soenke, additional
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- 2022
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33. Increasing awareness of degenerative cervical myelopathy: a preventative cause of non-traumatic spinal cord injury
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Zipser, Carl M, Margetis, Konstantinos, Pedro, Karlo M, Curt, Armin, Fehlings, Michael, Sadler, Iwan, Tetreault, Lindsay, Davies, Benjamin M, AO Spine RECODE DCM Steering Committee, Members Of The Diagnostic Criteria Working Group, Zipser, Carl M [0000-0002-4396-4796], Fehlings, Michael [0000-0002-5722-6364], and Apollo - University of Cambridge Repository
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Cervical Vertebrae ,Humans ,musculoskeletal system ,Spinal Cord Diseases ,Spinal Cord Injuries - Abstract
Degenerative cervical myelopathy (DCM) is a common non-traumatic spinal cord disorder and characterized by progressive neurological impairment. Generally, it is still underdiagnosed and referral to spine specialists is often late, when patients already present with incomplete cervical spinal cord injury (SCI). To improve early diagnosis and accelerate referral, diagnostic criteria for DCM are required. Recently, AO Spine RECODE- DCM (REsearch Objectives and Common Data Elements for Degenerative Cervical Myelopathy) (aospine.org/recode), an international, interdisciplinary and interprofessional initiative, including patients with DCM, was funded with the aim to accelerate knowledge discovery that can change outcomes. In this perspective we advocate for the participation of SCI specialists in this process, where the expertise and perspective on this disorder and requirements for the diagnostic and therapeutic work up is well developed.
- Published
- 2021
34. Cerebrospinal fluid pressure dynamics reveal signs of effective spinal canal narrowing in ambiguous spine conditions
- Author
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Kheram, Najmeh, primary, Pfender, Nikolai, additional, Boraschi, Andrea, additional, Farshad, Mazda, additional, Kurtcuoglu, Vartan, additional, Curt, Armin, additional, Schubert, Martin, additional, and Zipser, Carl M., additional
- Published
- 2022
- Full Text
- View/download PDF
35. Predisposing and precipitating risk factors for delirium in gastroenterology and hepatology: Subgroup analysis of 718 patients from a hospital-wide prospective cohort study
- Author
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Hildenbrand, Florian F, Murray, Fritz R, von Känel, Roland, Deibel, Ansgar R, Schreiner, Philipp, Ernst, Jutta, Zipser, Carl M, Böettger, Soenke, Hildenbrand, Florian F, Murray, Fritz R, von Känel, Roland, Deibel, Ansgar R, Schreiner, Philipp, Ernst, Jutta, Zipser, Carl M, and Böettger, Soenke
- Abstract
BACKGROUND AND AIMS Delirium is the most common acute neuropsychiatric syndrome in hospitalized patients. Higher age and cognitive impairment are known predisposing risk factors in general hospital populations. However, the interrelation with precipitating gastrointestinal (GI) and hepato-pancreato-biliary (HPB) diseases remains to be determined. PATIENTS AND METHODS Prospective 1-year hospital-wide cohort study in 29'278 adults, subgroup analysis in 718 patients hospitalized with GI/HPB disease. Delirium based on routine admission screening and a DSM-5 based construct. Regression analyses used to evaluate clinical characteristics of delirious patients. RESULTS Delirium was detected in 24.8% (178/718). Age in delirious patients (median 62 years [IQR 21]) was not different to non-delirious (median 60 years [IQR 22]), p = 0.45). Dementia was the strongest predisposing factor for delirium (OR 66.16 [6.31-693.83], p < 0.001). Functional impairment, and at most, immobility increased odds for delirium (OR 7.78 [3.84-15.77], p < 0.001). Patients with delirium had higher in-hospital mortality rates (18%; OR 39.23 [11.85-129.93], p < 0.001). From GI and HPB conditions, cirrhosis predisposed to delirium (OR 2.11 [1.11-4.03], p = 0.023), while acute renal failure (OR 4.45 [1.61-12.26], p = 0.004) and liver disease (OR 2.22 [1.12-4.42], p = 0.023) were precipitators. Total costs were higher in patients with delirium (USD 30003 vs. 10977; p < 0.001). CONCLUSION Delirium in GI- and HPB-disease was not associated with higher age per se, but with cognitive and functional impairment. Delirium needs to be considered in younger adults with acute renal failure and/or liver disease. Clinicians should be aware about individual risk profiles, apply preventive and supportive strategies early, which may improve outcomes and lower costs.
- Published
- 2022
36. Proposing a Framework to Understand the Role of Imaging in Degenerative Cervical Myelopathy: Enhancement of MRI Protocols Needed for Accurate Diagnosis and Evaluation
- Author
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Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364, Margetis, Konstantinos, Curt, Armin, Betz, Michael, Sadler, Iwan, Tetreault, Lindsay, Davies, Benjamin M; https://orcid.org/0000-0003-0591-5069, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Fehlings, Michael G; https://orcid.org/0000-0002-5722-6364, Margetis, Konstantinos, Curt, Armin, Betz, Michael, Sadler, Iwan, Tetreault, Lindsay, and Davies, Benjamin M; https://orcid.org/0000-0003-0591-5069
- Published
- 2022
37. Discharge Destinations of Delirious Patients: Findings From a Prospective Cohort Study of 27,026 Patients From a Large Health Care System
- Author
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Zipser, Carl M, Spiller, Tobias R, Hildenbrand, Florian F, Seiler, Annina, Ernst, Jutta, von Känel, Roland, Inouye, Sharon K, Boettger, Soenke, Zipser, Carl M, Spiller, Tobias R, Hildenbrand, Florian F, Seiler, Annina, Ernst, Jutta, von Känel, Roland, Inouye, Sharon K, and Boettger, Soenke
- Abstract
Objectives Delirium is known to contribute to increased rates of institutionalization and mortality. The full extent of adverse outcomes, however, remains understudied. We aimed to systematically assess the discharge destinations and mortality risk in delirious patients in a large sample across all hospital services. Design Pragmatic prospective cohort study of consecutive admissions to a large health care system. Setting and Participants A total of 27,026 consecutive adults (>18 years old) with length of stay of at least 24 hours in a tertiary care center from January 1 to December 31, 2014. Methods Presence of delirium determined by routine delirium screening. Clinical characteristics, discharge destination, and mortality were collected. Calculation of odds ratios (ORs) with logistic regression with adjustment for age, sex, and Charlson comorbidity index (CCI). Results Delirium was detected in 19.7% of patients (5313 of 27,026), median age of delirious patients was 56 years (25–75 interquartile range = 37–70). The electronic health record (DSM-5-based) delirium algorithm correctly identified 93.3% of delirium diagnoses made by consultation-liaison psychiatrists. Across services, the odds of delirious patients returning home was significantly reduced [OR 0.12; confidence interval (CI) 0.10–0.13; P < .001]. Rather, these patients were transferred to acute rehabilitation (OR 4.15; CI 3.78–4.55; P < .001) or nursing homes (OR 4.12; CI 3.45–4.93; P < .001). Delirious patients had a significantly increased adjusted mortality risk (OR 30.0; CI 23.2–39.4; P < .001). Conclusions and Implications This study advances our understanding of the discharge destination across all services in adults admitted to a large hospital system. Delirium was associated with reduced odds of returning home, increased odds of discharge to a setting of higher dependency, and excess mortality independent of comorbidity, age, and sex. These findings emphasize the potentially devastating outcomes a
- Published
- 2022
38. Proposing a Framework to Understand the Role of Imaging in Degenerative Cervical Myelopathy: Enhancement of MRI Protocols Needed for Accurate Diagnosis and Evaluation
- Author
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Zipser, Carl M, Fehlings, Michael G, Margetis, Konstantinos, Curt, Armin, Betz, Michael, Sadler, Iwan, Tetreault, Lindsay, Davies, Benjamin M, University of Zurich, and Fehlings, Michael G
- Subjects
2732 Orthopedics and Sports Medicine ,2728 Neurology (clinical) ,610 Medicine & health ,10046 Balgrist University Hospital, Swiss Spinal Cord Injury Center - Published
- 2022
- Full Text
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39. Hospital‐wide evaluation of delirium incidence in adults under 65 years of age
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Zipser, Carl M, Seiler, Annina, Deuel, Jeremy, Ernst, Jutta, Hildenbrand, Florian, von Känel, Roland, Boettger, Soenke, University of Zurich, and Zipser, Carl M
- Subjects
2738 Psychiatry and Mental Health ,Psychiatry and Mental health ,10057 Klinik für Konsiliarpsychiatrie und Psychosomatik ,2728 Neurology (clinical) ,Neurology ,2808 Neurology ,General Neuroscience ,Clinical Neurology ,2800 General Neuroscience ,610 Medicine & health ,General Medicine - Published
- 2020
40. Intraoperative Monitoring of CSF Pressure in Patients with Degenerative Cervical Myelopathy (COMP-CORD Study): A Prospective Cohort Study
- Author
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Zipser, Carl M., primary, Pfender, Nikolai, additional, Kheram, Najmeh, additional, Boraschi, Andrea, additional, Aguirre, José, additional, Ulrich, Nils H., additional, Spirig, José Miguel, additional, Ansorge, Alexandre, additional, Betz, Michael, additional, Wanivenhaus, Florian, additional, Hupp, Markus, additional, Kurtcuoglu, Vartan, additional, Farshad, Mazda, additional, Curt, Armin, additional, and Schubert, Martin, additional
- Published
- 2022
- Full Text
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41. Development of a core measurement set for research in degenerative cervical myelopathy: a study protocol (AO Spine RECODE-DCM CMS)
- Author
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Davies, Benjamin M., primary, Touzet, Alvaro Yanez, additional, Mowforth, Oliver D., additional, Lee, Keng Siang, additional, Khan, Danyal, additional, Furlan, Julio C., additional, Fehlings, Michael G., additional, Harrop, James, additional, Zipser, Carl M., additional, Rodrigues-Pinto, Ricardo, additional, Milligan, James, additional, Sarewitz, Ellen, additional, Curt, Armin, additional, Rahimi-Movaghar, Vafa, additional, Aarabi, Bizhan, additional, Boerger, Timothy F., additional, Tetreault, Lindsay, additional, Chen, Robert, additional, Guest, James D., additional, Kalsi-Ryan, Sukhvinder, additional, Sadler, Iwan, additional, Widdop, Shirley, additional, McNair, Angus G. K., additional, and Kotter, Mark R. N., additional
- Published
- 2021
- Full Text
- View/download PDF
42. Proposing a Framework to Understand the Role of Imaging in Degenerative Cervical Myelopathy: Enhancement of MRI Protocols Needed for Accurate Diagnosis and Evaluation.
- Author
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Zipser, Carl M., Fehlings, Michael G., Margetis, Konstantinos, Curt, Armin, Betz, Michael, Sadler, Iwan, Tetreault, Lindsay, Davies, Benjamin M., and AO Spine RECODE DCM Steering Committee and Members of the Diagnostic Criteria Working Group
- Abstract
Degenerative cervical myelopathy (DCM) is the most common form of spinal cord impairment in adults. APPLICATION OF NEUROIMAGING FRAMEWORK IN DCM In DCM, cervical spine imaging, and in particular MRI, is essential for the diagnosis and is not optional, as spinal canal narrowing is a prerequisite for spinal cord compression. ADVANCED NEUROIMAGING: FROM SPINAL STENOSIS TO MEASURES OF SPINAL CORD DISTRESS To enhance the utility of cervical spine MRI, several advanced neuroimaging methods are in various stages of translation.[17] Their entry into clinical practice may adjust the role of MRI in the diagnosis of DCM, for example, to rule in a diagnosis of DCM. [Extracted from the article]
- Published
- 2022
- Full Text
- View/download PDF
43. Increasing awareness of degenerative cervical myelopathy: a preventative cause of non-traumatic spinal cord injury
- Author
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Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Margetis, Konstantinos, Pedro, Karlo M, Curt, Armin, Fehlings, Michael; https://orcid.org/0000-0002-5722-6364, Sadler, Iwan, Tetreault, Lindsay, Davies, Benjamin M, Zipser, Carl M; https://orcid.org/0000-0002-4396-4796, Margetis, Konstantinos, Pedro, Karlo M, Curt, Armin, Fehlings, Michael; https://orcid.org/0000-0002-5722-6364, Sadler, Iwan, Tetreault, Lindsay, and Davies, Benjamin M
- Abstract
Degenerative cervical myelopathy (DCM) is a common non-traumatic spinal cord disorder and characterized by progressive neurological impairment. Generally, it is still underdiagnosed and referral to spine specialists is often late, when patients already present with incomplete cervical spinal cord injury (SCI). To improve early diagnosis and accelerate referral, diagnostic criteria for DCM are required. Recently, AO Spine RECODE- DCM (REsearch Objectives and Common Data Elements for Degenerative Cervical Myelopathy) (aospine.org/recode), an international, interdisciplinary and interprofessional initiative, including patients with DCM, was funded with the aim to accelerate knowledge discovery that can change outcomes. In this perspective we advocate for the participation of SCI specialists in this process, where the expertise and perspective on this disorder and requirements for the diagnostic and therapeutic work up is well developed.
- Published
- 2021
44. Hospital‐wide evaluation of delirium incidence in adults under 65 years of age
- Author
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Zipser, Carl M., primary, Seiler, Annina, additional, Deuel, Jeremy, additional, Ernst, Jutta, additional, Hildenbrand, Florian, additional, Känel, Roland, additional, and Boettger, Soenke, additional
- Published
- 2020
- Full Text
- View/download PDF
45. Phenylalanine Effects on Brain Function in Adult Phenylketonuria.
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Pilotto, Andrea, Zipser, Carl M., Leks, Edytha, Haas, Dorothea, Gramer, Gwendolyn, Freisinger, Peter, Schaeffer, Eva, Liepelt-Scarfone, Inga, Brockmann, Kathrin, Maetzler, Walter, Schulte, Claudia, Deuschle, Christian, Hauser, Ann Kathrin, Hoffmann, Georg F., Scheffler, Klaus, van Spronsen, Francjan J., Padovani, Alessandro, Trefz, Friedrich, and Berg, Daniela
- Published
- 2021
- Full Text
- View/download PDF
46. Cortical Excitability and Interhemispheric Connectivity in Early Relapsing–Remitting Multiple Sclerosis Studied With TMS-EEG
- Author
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Zipser, Carl M., primary, Premoli, Isabella, additional, Belardinelli, Paolo, additional, Castellanos, Nazareth, additional, Rivolta, Davide, additional, Heidegger, Tonio, additional, Müller-Dahlhaus, Florian, additional, and Ziemann, Ulf, additional
- Published
- 2018
- Full Text
- View/download PDF
47. Increasing awareness of degenerative cervical myelopathy: a preventative cause of non-traumatic spinal cord injury
- Author
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Zipser, Carl M., Margetis, Konstantinos, Pedro, Karlo M., Curt, Armin, Fehlings, Michael, Sadler, Iwan, Tetreault, Lindsay, and Davies, Benjamin M.
- Abstract
Degenerative cervical myelopathy (DCM) is a common non-traumatic spinal cord disorder and characterized by progressive neurological impairment. Generally, it is still underdiagnosed and referral to spine specialists is often late, when patients already present with incomplete cervical spinal cord injury (SCI). To improve early diagnosis and accelerate referral, diagnostic criteria for DCM are required. Recently, AO Spine RECODE- DCM (REsearch Objectives and Common Data Elements for Degenerative Cervical Myelopathy) (aospine.org/recode), an international, interdisciplinary and interprofessional initiative, including patients with DCM, was funded with the aim to accelerate knowledge discovery that can change outcomes. In this perspective we advocate for the participation of SCI specialists in this process, where the expertise and perspective on this disorder and requirements for the diagnostic and therapeutic work up is well developed.
- Published
- 2021
- Full Text
- View/download PDF
48. Effects of the Selective α5-GABAAR Antagonist S44819 on Excitability in the Human Brain: A TMS–EMG and TMS–EEG Phase I Study
- Author
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Darmani, Ghazaleh, primary, Zipser, Carl M., additional, Böhmer, Gabriele M., additional, Deschet, Karine, additional, Müller-Dahlhaus, Florian, additional, Belardinelli, Paolo, additional, Schwab, Matthias, additional, and Ziemann, Ulf, additional
- Published
- 2016
- Full Text
- View/download PDF
49. Effects of the Selective α5-GABAAR Antagonist S44819 on Excitability in the Eluman Brain: A TMS-EMG and TMS-EEG Phase I Study.
- Author
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Darmani, Ghazaleh, Zipser, Carl M., Müller-Dahlhaus, Florian, Belardinelli, Paolo, Ziemann, Ulf, Böhmer, Gabriele M., Schwab, Matthias, and Deschet, Karine
- Subjects
- *
GABA receptors , *TRANSCRANIAL magnetic stimulation , *BRAIN research , *ELECTROMYOGRAPHY , *ELECTROENCEPHALOGRAPHY - Abstract
Alpha-5 gamma-aminobutyric acid type A receptors (α5-G ABAARs) are located extrasynaptically, regulate neuronal excitability through tonic inhibition, and are fundamentally important for processes such as plasticity and learning. For example, pharmacological blockade of α5-GABAAR in mice with ischemic stroke improved recovery of function by normalizing exaggerated perilesional α5-GABAAR-dependent tonic inhibition. S44819 is a novel competitive selective antagonist of the α5-GABAAR at the GABA-binding site. Pharmacological modulation of α5-GABAAR-mediated tonic inhibition has never been investigated in the human brain. Here, we used transcranial magnetic stimulation (TMS) to test the effects of a single oral dose of 50 and 100 mg of S44819 on electromyographic (EMG) and electroencephalographic (EEG) measures of cortical excitability in 18 healthy young adults in a randomized, double-blinded, placebo-controlled, crossover phase I study. A dose of 100 mg, but not 50 mg, of S44819 decreased active motor threshold, the intensity needed to produce a motor evoked potential of 0.5 mV, and the amplitude of the N45, a GABAAergic component of the TMS-evoked EEG response. The peak serum concentration of 100 mg S44819 correlated directly with the decrease in N45 amplitude. Short-interval intracortical inhibition, a TMS-EMG measure of synaptic GABAAergic inhibition, and other components of the TMS-evoked EEG response remained unaffected. These findings provide first time evidence that the specific α5-GABAAR antagonist S44819 reached human cortex to impose an increase in cortical excitability. These data warrant further development of S44819 in a human clinical trial to test its efficacy in enhancing recovery of function after ischemic stroke. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
50. Remote neurodegeneration in the lumbosacral cord one month after spinal cord injury: a cross-sectional MRI study.
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Büeler S, Anderson CE, Birkhäuser V, Freund P, Gross O, Kessler TM, Kündig CW, Leitner L, Mahnoor N, Mehnert U, Röthlisberger R, Stalder SA, van der Lely S, Zipser CM, David G, and Liechti MD
- Abstract
Objective: To characterize structural integrity of the lumbosacral enlargement and conus medullaris within one month after spinal cord injury (SCI)., Methods: Lumbosacral cord MRI data were acquired in patients with sudden onset (<7 days) SCI at the cervical or thoracic level approximately one month after injury and in healthy controls. Tissue integrity and loss were evaluated through diffusion tensor (DTI) and T2*-weighted imaging (cross-sectional area [CSA] measurements). Associations with the degree of neurological impairment were assessed using linear mixed-effects models., Results: Twenty-one patients with SCI showed lower white matter (WM) fractional anisotropy (FA) (≤-13.3%) and higher WM radial diffusivity (≤14.6%) compared to 27 healthy controls. Differences were most pronounced in the lateral columns of WM. CSA measurements revealed no group differences. For the lateral columns, lower FA values were associated with lower motor scores and lower amplitudes of motor evoked potentials. For the dorsal columns, lower FA values were associated with lower amplitudes of somatosensory evoked potentials from the lower extremities., Interpretation: One month after SCI, first signs of WM degeneration were apparent, without indication of tissue loss. The more pronounced differences observed in the lateral column could be attributed to anterograde degeneration of the motor tracts. The variability among DTI measurements remote from the lesion site can be partially explained by the degree of the SCI-induced neurological impairment. Together with previous studies, our findings indicate that impaired tissue integrity precedes tissue loss. The presented techniques have potential applications in monitoring the progression of various neurological diseases., (© 2025 The Author(s). Annals of Clinical and Translational Neurology published by Wiley Periodicals LLC on behalf of American Neurological Association.)
- Published
- 2025
- Full Text
- View/download PDF
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