30 results on '"Turmel N"'
Search Results
2. Aqua: A new questionnaire assessing anticholinergic side effects in neurogenic population (Aqua: Anticholinergic side effects questionnaire)
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Turmel, N., Hentzen, C., Tan, E., Haddad, R., Chesnel, C., Le Breton, F., and Amarenco, G.
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- 2022
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3. Adherence to transanal irrigation in older adults: first-year assessment
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Chesnel, C., Hentzen, C., Haddad, R., Charlanes, A., Le Breton, F., Turmel, N., and Amarenco, G.
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- 2021
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4. Comparison of clinical and paraclinical characteristics of patients with urge, mixed, and passive fecal incontinence: a systematic literature review
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Desprez, Charlotte, Turmel, N., Chesnel, C., Mistry, P., Tamiatto, M., Haddad, R., Le Breton, F., Leroi, A-M., Hentzen, C., and Amarenco, G.
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- 2021
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5. How to dress up in Neuro-urology department?
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Chesnel, C., Charlanes, A., Turmel, N., Miget, G., Le Breton, F., Tan, E., Hentzen, C., and Amarenco, G.
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- 2020
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6. Comparison of clinical and paraclinical characteristics of patients with urge, mixed, and passive fecal incontinence: a systematic literature review.
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Desprez, Charlotte, Turmel, N., Chesnel, C., Mistry, P., Tamiatto, M., Haddad, R., Le Breton, F., Leroi, A-M., Hentzen, C., and Amarenco, G.
- Abstract
Purpose: Two subgroups of fecal incontinence (FI) are described in literature and used in clinical practice. However, the pertinence of this classification of FI is still unknown as there are no clear established guidelines. To a better understanding, we performed a systematic review to characterize the different types of FI (active, passive, or mixed) on the basis of clinical presentation and complementary explorations.This systematic literature review was performed in reference to recommendations for systematic review using PRISMA guidelines without date restriction, until May 2020. This systematic review was performed without temporal limitation using MEDLINE-PubMed, Cochrane Library, and Google Scholar databases.Six hundred nine unique citations were identified from all the databases combined. Of those, 21 studies met the inclusion criteria, with 8 retrospective observational studies and 13 prospective observational studies. There was a lack of homogeneity in definitions of passive and urge (active) FI among studies. Prevalence of passive and urge FI was respectively of 4.0–5.0 and 15.0–35.0%. Clinical characteristics, physical examination, and endoanal imaging were not evaluated in most studies. In anorectal manometry, maximal squeeze pressure was higher in passive FI subgroup in most studies and results regarding maximal resting pressure remain discordant. There seemed to be no difference regarding first sensation volume and maximal tolerable volume among subgroups. A few studies evaluated pudendal terminal nerve motor latency with no difference among subgroups.There is a lack of well-conducted prospective studies comparing the different subtypes of FI with validated definitions in both clinical and paraclinical examinations.Methods: Two subgroups of fecal incontinence (FI) are described in literature and used in clinical practice. However, the pertinence of this classification of FI is still unknown as there are no clear established guidelines. To a better understanding, we performed a systematic review to characterize the different types of FI (active, passive, or mixed) on the basis of clinical presentation and complementary explorations.This systematic literature review was performed in reference to recommendations for systematic review using PRISMA guidelines without date restriction, until May 2020. This systematic review was performed without temporal limitation using MEDLINE-PubMed, Cochrane Library, and Google Scholar databases.Six hundred nine unique citations were identified from all the databases combined. Of those, 21 studies met the inclusion criteria, with 8 retrospective observational studies and 13 prospective observational studies. There was a lack of homogeneity in definitions of passive and urge (active) FI among studies. Prevalence of passive and urge FI was respectively of 4.0–5.0 and 15.0–35.0%. Clinical characteristics, physical examination, and endoanal imaging were not evaluated in most studies. In anorectal manometry, maximal squeeze pressure was higher in passive FI subgroup in most studies and results regarding maximal resting pressure remain discordant. There seemed to be no difference regarding first sensation volume and maximal tolerable volume among subgroups. A few studies evaluated pudendal terminal nerve motor latency with no difference among subgroups.There is a lack of well-conducted prospective studies comparing the different subtypes of FI with validated definitions in both clinical and paraclinical examinations.Results: Two subgroups of fecal incontinence (FI) are described in literature and used in clinical practice. However, the pertinence of this classification of FI is still unknown as there are no clear established guidelines. To a better understanding, we performed a systematic review to characterize the different types of FI (active, passive, or mixed) on the basis of clinical presentation and complementary explorations.This systematic literature review was performed in reference to recommendations for systematic review using PRISMA guidelines without date restriction, until May 2020. This systematic review was performed without temporal limitation using MEDLINE-PubMed, Cochrane Library, and Google Scholar databases.Six hundred nine unique citations were identified from all the databases combined. Of those, 21 studies met the inclusion criteria, with 8 retrospective observational studies and 13 prospective observational studies. There was a lack of homogeneity in definitions of passive and urge (active) FI among studies. Prevalence of passive and urge FI was respectively of 4.0–5.0 and 15.0–35.0%. Clinical characteristics, physical examination, and endoanal imaging were not evaluated in most studies. In anorectal manometry, maximal squeeze pressure was higher in passive FI subgroup in most studies and results regarding maximal resting pressure remain discordant. There seemed to be no difference regarding first sensation volume and maximal tolerable volume among subgroups. A few studies evaluated pudendal terminal nerve motor latency with no difference among subgroups.There is a lack of well-conducted prospective studies comparing the different subtypes of FI with validated definitions in both clinical and paraclinical examinations.Conclusion: Two subgroups of fecal incontinence (FI) are described in literature and used in clinical practice. However, the pertinence of this classification of FI is still unknown as there are no clear established guidelines. To a better understanding, we performed a systematic review to characterize the different types of FI (active, passive, or mixed) on the basis of clinical presentation and complementary explorations.This systematic literature review was performed in reference to recommendations for systematic review using PRISMA guidelines without date restriction, until May 2020. This systematic review was performed without temporal limitation using MEDLINE-PubMed, Cochrane Library, and Google Scholar databases.Six hundred nine unique citations were identified from all the databases combined. Of those, 21 studies met the inclusion criteria, with 8 retrospective observational studies and 13 prospective observational studies. There was a lack of homogeneity in definitions of passive and urge (active) FI among studies. Prevalence of passive and urge FI was respectively of 4.0–5.0 and 15.0–35.0%. Clinical characteristics, physical examination, and endoanal imaging were not evaluated in most studies. In anorectal manometry, maximal squeeze pressure was higher in passive FI subgroup in most studies and results regarding maximal resting pressure remain discordant. There seemed to be no difference regarding first sensation volume and maximal tolerable volume among subgroups. A few studies evaluated pudendal terminal nerve motor latency with no difference among subgroups.There is a lack of well-conducted prospective studies comparing the different subtypes of FI with validated definitions in both clinical and paraclinical examinations. [ABSTRACT FROM AUTHOR]
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- 2020
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7. Impact of financial incentives introduced during the COVID-19 pandemic on nursing staff: a mixed-method protocol.
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Beaulieu M, Viens D, Gilbert-Ouimet M, Rossignol S, Gagnon MP, Turmel N, Racine S, Cameron M, Roy N, Bernier L, Gravel C, and Turcotte S
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- Humans, Quebec, Nursing Staff economics, Personnel Turnover, Pandemics, Research Design, Qualitative Research, Focus Groups, COVID-19 epidemiology, Motivation, SARS-CoV-2
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Introduction: The COVID-19 pandemic has had a major impact on nursing staff, resulting in alarming turnover rates. As part of the Quebec (Canada) government's response to the pandemic, nurses have been offered exceptional financial incentives. Considering the cost of these measures, the current article presents the research protocol of a study aiming to explore the impact of financial incentives on full-time equivalent, and retention rates among the nursing staff in two healthcare settings in Quebec., Methods and Analysis: A sequential mixed design (QUANT→QUAL) will be used. The quantitative phase will involve a quantitative descriptive analysis and the qualitative phase will consist of a qualitative descriptive study. Administrative data (working hours, employment status and retention rate) will be analysed over a 4.5-year follow-up (from 1 January 2019 to 30 June 2023) to explore the impact of the financial incentives. Focus groups will explore nurses' views on financial incentives. The results will inform the development of future interventions to mitigate attrition problems among nurses and ultimately improve access to and the continuity of public health services., Ethics and Dissemination: The study has been approved by ethics committees of the participating healthcare settings (Comité d'éthique de la recherche sectorial en santé des populations et première ligne du CIUSSS de la Capitale-Nationale; Comité d'éthique de la recherche du CISSS de Chaudière-Appalaches). The results will be disseminated mainly in scientific publications and at academic conferences in addition to presentations tailored to various non-academic audiences., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2024
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8. Fecal Incontinence Subtype Assessment (FI-SA): Validation of a new tool to distinguish among subtypes of fecal incontinence.
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Julienne A, Gourcerol G, Amarenco G, Turmel N, Leroi AM, and Desprez C
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- Humans, Reproducibility of Results, Surveys and Questionnaires, Fecal Incontinence diagnosis
- Abstract
Purpose: Three subtypes of fecal incontinence (FI) are described in the literature: urge, mixed and passive FI, but the relevance of this classification remains unknown. To our knowledge, no questionnaire has been validated in a general population of patients with FI to classify patients between the different subtypes of FI. The aim of the present study was to validate the Fecal Incontinence Subtype Assessment (FI-SA) questionnaire in a general population of patients with FI., Methods: All consecutive patients referred to our unit for physiological investigations of anorectal function in case of FI were included. A feasibility study was done to assess the acceptability, understanding, and the reproducibility of the FI-SA questionnaire. Its performance to correctly classify patients between subtypes of FI was evaluated in both a feasibility study and in a validation study, using clinical interview as gold standard., Results: The FI-SA questionnaire was found to be well accepted and easily understood by patients. Moreover, it was filled rapidly by patients, with a good reproducibility with an intra-class correlation coefficient of 0.97 and 0.87 for questions 1 and 2. Lastly, the accuracy of the FI-SA questionnaire to predict subtypes of FI was 93.3 % in the feasibility study (n = 30) and 81.1 % in the validation study (n = 100), in comparison with clinical interview as gold standard., Conclusion: The FI-SA questionnaire could be used in the future to help standardize the methodology used among studies to evaluate the classification of patients in different subtypes of FI and ultimately to guide therapeutics., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023. Published by Elsevier Masson SAS.)
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- 2024
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9. The Neurogenic Bowel Dysfunction score (NBD) is not suitable for patients with multiple sclerosis.
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Miget G, Tan E, Pericolini M, Chesnel C, Haddad R, Turmel N, Amarenco G, and Hentzen C
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- Humans, Female, Middle Aged, Retrospective Studies, Surveys and Questionnaires, Neurogenic Bowel diagnosis, Neurogenic Bowel etiology, Neurogenic Bowel therapy, Multiple Sclerosis complications, Multiple Sclerosis diagnosis, Spinal Cord Injuries complications, Spinal Cord Injuries diagnosis
- Abstract
Study Design: Retrospective cohort study., Objective: Bowel and anorectal dysfunctions are common in patients with multiple sclerosis (pwMS). The use of validated questionnaires is recommended in the initial assessment and patient's follow-up. The Neurogenic Bowel Dysfunction (NBD) score is the most used questionnaire but has been developed in spinal cord injured patients and has never been validated in other neurological diseases. We aimed to assess NBD's relevance in pwMS., Settings: Monocentric study in a tertiary neuro-urology department., Methods: A retrospective study in pwMS consulting for the first time in our department, that fulfilled the NBD questionnaire between 2010 and 2021 was performed. Qualitative and quantitative answers for each question were analyzed. Content validity and internal consistency were evaluated., Results: One hundred thirty-five pwMS (mean age 47.1, 58% of women) fulfilled the NBD questionnaire. Mean NBD score was 6.0 (SD 6.1) and 75% of patients had a score <9. Content validity analysis revealed 4 items not appropriate, 1 item with irrelevant calibration, and omission of some treatment widely used in pwMS. Internal consistency was appreciated with Cronbach's alpha = 0.48 IC 95% [0.31; 0.6]., Conclusion: NBD questionnaire lacks content validity and presents a weak internal consistency in pwMS. A specific questionnaire is therefore required in pwMS to optimize bowel management and follow-up., (© 2022. The Author(s), under exclusive licence to International Spinal Cord Society.)
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- 2022
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10. French version of the short form of the Neurogenic Bladder Symptom Score: Cross-cultural adaptation and validation.
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Berradja S, Turmel N, Hentzen C, Haddad R, Miget G, Grasland M, Chesnel C, Nadeau G, and Amarenco G
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Introduction: This study aimed to empirically validate a French version of the Neurogenic Bladder Symptoms Score-Short From (NBSS-SF), a psychometric multidimensional tool to assess lower urinary tract symptoms (LUTS) for patients with a neurological condition., Methods: One hundred and five participants with multiple sclerosis or spinal cord injury prospectively completed the questionnaire at baseline and 7-14 days later. The α coefficient of Cronbach (internal consistency) and the intraclass correlation coefficient (ICC) (test-retest reliability) were calculated., Results: The internal consistency for the overall questionnaire was high (Cronbach's α coefficients from 0.79), while coefficients for each subscale were variable (urinary incontinence 0.91; storage and voiding 0.69; consequences 0.25). For test-retest reliability, 88/105 (84%) patients filled and sent back their questionnaire 10 days (±3.6 days) after baseline version. ICC was 0.90 for the total score and was 0.73 for the urinary incontinence subdomain, 0.79 for storage and voiding, and 0.75 for consequences., Conclusions: The psychometric qualities of the French version of the NBSS-SF are well-supported, thus providing a valid tool to measure bladder symptoms across three different domains in patients with neurogenic bladder.
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- 2022
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11. Fecal incontinence subtype assessment (FI-SA): A new tool to distinguish among subtypes of fecal incontinence in a neurogenic population.
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Desprez C, Turmel N, Chesnel C, Sheikh Ismael S, Tamiatto M, Tan E, Haddad R, Le Breton F, Leroi AM, Hentzen C, and Amarenco G
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- Humans, Prospective Studies, Reproducibility of Results, Surveys and Questionnaires, Fecal Incontinence diagnosis
- Abstract
Introduction: Two subtypes of fecal incontinence (FI) are defined in the literature (urge and passive FI). The pertinence of this classification is unknown due to conflicting findings and heterogeneity of definitions. However, no questionnaire is available to clearly classify patients among subtypes. The objective of the present study was to develop and validate a new tool (Fecal incontinence subtype assessment, FI-SA) in order to better classify patients among the different subtypes of FI., Methods: A prospective monocentric study was conducted in consecutive patients with FI according to Rome IV criteria. To validate psychometric properties of the FI-SA questionnaire, a literature review and qualitative interviews were performed and discussed with an expert panel. A feasibility study was realized to assess acceptability and comprehension of items. The reproducibility was investigated in a validation study., Results: Comprehension and acceptability were excellent in 90% of patients in the feasibility study (n = 30). Validation study (n = 100) showed a good reproducibility with an intra-class correlation coefficient of 0.91 and 0.89 for questions 1 and 2. Time to fill the questionnaire was 40.0 s. 98.0% patients were classified among subtypes of FI: 34.0% passive FI, 32.0% urge FI and 32.0% mixed FI., Conclusion: FI-SA is the first questionnaire to classify patients among subtypes of FI with good psychometric characteristics and the first questionnaire introducing the concept of mixed FI. FI-SA could help to determine the pertinence of this classification of FI in the management of these patients., Competing Interests: Declaration of Competing Interests The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Masson SAS. All rights reserved.)
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- 2022
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12. Functional independence measure predicts the outcome of clean intermittent catheterization training in patients with multiple sclerosis.
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Haddad R, Turmel N, Lagnau P, Chesnel C, Le Breton F, Amarenco G, and Hentzen C
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- Female, Functional Status, Humans, Male, Middle Aged, Retrospective Studies, Disabled Persons, Intermittent Urethral Catheterization adverse effects, Multiple Sclerosis complications
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Background: Clean intermittent catheterization (CIC) is the reference treatment of urinary retention in people with multiple sclerosis (pwMS). Predicting which patients could use this treatment, based on their motor and cognitive abilities, is crucial., Objectives: To determine whether the Functional Independence Measure (FIM), used to assess degree of disability, can predict the outcome of CIC training in pwMS., Methods: All pwMS attending a tertiary neuro-urology department between 2011 and 2019 and eligible for CIC were included in this retrospective study. Level of disability was assessed with the FIM by an occupational therapist. Success for learning CIC, defined as the ability to perform at least 2 trials of the technique, was recorded at the end of the session by a continence nurse and a physiatrist. The association between the FIM and success for learning CIC was assessed by multivariable analysis., Results: We included 395 patients (mean [SD] age 49.8 [12.0] years; 70% women). More than half of patients had relapsing-remitting disease, and the Expanded Disability Status Scale score was≥6. Mean FIM total, motor and cognitive scores were 108.0 (14.2), 75.9 (12.3) and 32.1 (3.7), respectively (maximal scores: 126, 91 and 35). At the end of the session, 87% of patients were successful in learning CIC. After adjustment of potential confounding variables including age, sex, obesity and EDSS score, FIM total, motor and cognitive subscores were significantly associated with success (odds ratio [95% confidence interval] 1.06 [1.03-1.08], 1.05 [1.03-1.08], 1.21 [1.12-1.32], respectively)., Conclusions: FIM was an independent predictor of successful CIC training in pwMS. A 1-point increase in FIM was associated with 6% increased odds of successfully mastering the CIC technique. A widespread use of the FIM could help determine the different cognitive and/or motor objectives that need to be improved before CIC teaching., (Copyright © 2021. Published by Elsevier Masson SAS.)
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- 2022
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13. Upper urinary tract function of patients with multiple sclerosis.
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Piquet V, Turmel N, Chesnel C, Haddad R, Lebreton F, Amarenco G, and Hentzen C
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- Adult, Female, Humans, Infant, Middle Aged, Retrospective Studies, Urodynamics, Multiple Sclerosis complications, Multiple Sclerosis diagnostic imaging, Urinary Tract, Urinary Tract Infections diagnosis, Vesico-Ureteral Reflux
- Abstract
Background: Neurogenic lower urinary tract dysfunction (NLUTD) is frequent in multiple sclerosis (MS) and renal prognosis is a key point of bladder management., Objective: To assess upper urinary tract damage risk using voiding cystourethrography (VCUG) in patients with (PwMS) and NLUTD., Methods: We conducted a retrospective study between 2010 and 2020. Demographic data, urinary symptoms, urinary tract infection (UTI), renal ultrasounds findings, glomerular filtration rate (GFR), VCUG data, and urodynamic parameters were collected in PwMS with NLUTD., Results: Among 325 PwMS included, 67% were female, mean age was 51.6 ± 12.0 years, and mean EDSS 4.6 ± 1.8. VCUG showed vesicoureteral reflux (VUR) in 18 patients. A link was found between VUR and progressive MS course (p = 0.04), hydronephrosis (odds ratio [OR] = 17.44; 95% confidence interval [CI] = 3.46-87.87; p = 0.001), low GFR (p < 0.001), and detrusor overactivity (p = 0.04). No association with UTIs, EDSS, detrusor sphincter dyssynergia, were elicited. On multivariate analysis, alteration of GFR was independently related to the presence of VUR (OR = 0.95; 95% CI = 0.92-0.98)., Conclusions: VUR elicited on VCUG is associated with lower GFR and hydronephrosis. However, due to the low prevalence (5.5%) of this abnormality in PwMS, VCUG should be performed in selected cases and not in routinary practice., (© 2021 Wiley Periodicals LLC.)
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- 2022
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14. Prioritization of risk situations in neuro-urology: guidelines from Association Française d'Urologie (AFU), Association Francophone Internationale des Groupes d'Animation de la Paraplégie (A.F.I.G.A.P.), Groupe de Neuro-urologie de Langue Française (GENULF), Société Française de Médecine Physique et de Réadaptation (SOFMER) and Société Interdisciplinaire Francophone d'UroDynamique et de Pelvi-Périnéologie (SIFUD-PP).
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Hentzen C, Biardeau X, Turmel N, Haddad R, Bey E, Amarenco G, Denys P, Phé V, Perrouin-Verbe MA, Peyronnet B, and Joussain C
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- Clinical Protocols, Humans, Risk Assessment, Time Factors, Triage, Urinary Bladder, Neurogenic therapy, Neurology, Patient Selection, Urinary Bladder, Neurogenic diagnosis, Urinary Bladder, Neurogenic etiology, Urology
- Abstract
Purpose: The current health crisis has drastically impacted patient management in many fields, including neuro-urology, leading to a mandatory reorganization. The aim of this work was to establish guidelines regarding the prioritization and optimal timing of each step of neurogenic lower urinary tract dysfunction management., Methods: A steering committee included urologists and physical medicine and rehabilitation practitioners. Based on a literature review and their own expertise, they established a comprehensive risk-situation list and built a risk scale, allowing multiple other experts to score each clinical situation. New recommendations were generated using a Delphi process approach., Results: Forty-nine experts participated in the rating group. Among the 206 initial items, 163 were selected and divided into four domains, diagnosis and assessment, treatment, follow-up, and complications, and two sub-domains, general (applicable for all neurological conditions) and condition-specific [varying according to the neurological condition (spinal cord injury, multiple sclerosis, brain injury, Parkinsonism, dysraphism, lower motor neuron lesions)]. The resulted guidelines are expert opinions established by a panel of French-speaking specialists, which could limit the scalability of this work., Conclusions: The present multidisciplinary collaborative work generates recommendations which complement existing guidelines and help clinicians to reorganize their patients' list in the long term with a personalized medicine approach, in the context of health crisis or not., (© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
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- 2022
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15. Assessment of sacral spinal excitability using stimulus-response curves of the bulbocavernosus reflex.
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Miget G, Hentzen C, Turmel N, Chesnel C, Le Breton F, Ismael SS, Kerdraon J, and Amarenco G
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- Adult, Aged, Electric Stimulation methods, Feasibility Studies, Female, Humans, Male, Middle Aged, Nervous System Diseases diagnosis, Prospective Studies, Sacrum innervation, Urinary Bladder innervation, Urinary Bladder physiology, Nervous System Diseases physiopathology, Pudendal Nerve physiology, Reflex, Abnormal physiology, Sacrum physiology
- Abstract
Objective: To analyze and quantify sacral spinal excitability through bulbocavernosus reflex (BCR) stimulus-response curves., Methods: Thirty subjects with upper motor neuron lesions (UMN) and nine controls were included in this prospective, monocentric study. Sacral spinal excitability was assessed using stimulus-response curves of the BCR, modeled at different bladder filling volumes relative to the desire to void (as defined by the International Continence Society) during a cystometry. Variations in α (i.e. the slope of the stimulus-response curve) were considered as an indicator of the modulation of sacral spinal excitability., Results: In all subjects, α increased during bladder filling suggesting the modulation of spinal sacral excitability during the filling phase. This increase was over 30% in 96.7% of neurological subjects and 88.9% of controls. The increase was higher before the first sensation to void in the neurological population (163.15%), compared to controls, (29.91%), p < 0.001., Conclusions: We showed the possibility of using BCR stimulus-response curves to characterize sacral spinal response with an amplification of this response during bladder filling as well as a difference in this response amplification in patients with UMN in comparison with a control group., Significance: BCR, through stimulus-response curves, might be an indicator of pelvic-perineal exaggerated reflex response and possibly a tool for evaluating treatment effectiveness., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 International Federation of Clinical Neurophysiology. Published by Elsevier B.V. All rights reserved.)
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- 2021
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16. Are falls in people with multiple sclerosis related to the severity of urinary disorders?
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Hentzen C, Villaumé A, Turmel N, Chesnel C, Le Breton F, Haddad R, and Amarenco G
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- Cross-Sectional Studies, Female, Humans, Male, Middle Aged, Urinary Incontinence, Urge etiology, Accidental Falls, Multiple Sclerosis complications, Nocturia etiology, Urinary Bladder, Overactive etiology
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Background: Lower urinary tract symptoms (LUTSs), especially overactive bladder, are frequent in people with multiple sclerosis (PwMS). Urinary urgency and urge urinary incontinence could lead to precipitation and thus could increase the risk of falling in these individuals., Objective: We aimed to assess the association between severity of LUTSs and risk of falling in PwMS., Methods: PwMS with LUTSs were recruited in a neuro-urology department. Participants were asked about the number of falls in the past 3 months and their circumstances. Severity of LUTSs was assessed by the Urinary Symptoms Profile (USP) score, and individuals were classified as with or without urinary incontinence., Results: This cross-sectional study included 154 patients (69% women); the mean (SD) age was 50.1 (11.5) years and median EDSS was 5 (interquartile range 3-6). Overall, 20 (13%) patients reported one fall during the past 3 months, and 43 (28%) reported at least 2 falls. Only 9 (6%) patients reported a fall on the way to the toilet, 6 during a urinary urgency. No link was found between falls and urinary incontinence (P=0.71), type or severity of urinary symptoms (overactivity, voiding dysfunction or stress incontinence, P>0.05). Falls on the way to the bathroom was associated with high USP score related to overactive bladder (P=0.03) and severe nocturia (>2 nocturnal micturitions) (P<0.01). Falling at night was also associated with severe nocturia (P<0.001)., Conclusions: The severity of LUTSs and presence of urinary incontinence do not appear related to the risk of falling in PwMS and urinary disorders but rather to the specific risk of falling on the way to the bathroom. Severe nocturia increases the risk of falling at night. Further studies are needed to assess the impact of LUTS treatment on the risk of falling. ClinicalTrials.gov (NCT04338646)., (Copyright © 2020 Elsevier Masson SAS. All rights reserved.)
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- 2021
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17. Re: Urologic, neurologic, and general practice implications of the Time to be Ready to Void test.
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Hentzen C, Villaumé A, Turmel N, Miget G, Le Breton F, Chesnel C, and Amarenco G
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- Humans, General Practice, Urination
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- 2021
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18. Determinants and impact of the time to perform clean intermittent self-catheterization on patient adherence and quality of life: A prospective observational study.
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Leroux C, Turmel N, Chesnel C, Grasland M, Le Breton F, Amarenco G, and Hentzen C
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- Catheterization, Humans, Patient Compliance, Prospective Studies, Self Care, Urinary Catheterization, Intermittent Urethral Catheterization adverse effects, Quality of Life
- Abstract
Aims: To measure the time required to perform clean intermittent self-catheterization (CISC) in daily life and to assess its impact on adherence and quality of life., Methods: Patients performing CISC for more than 1 month were invited to participate. At home, patients were asked to complete a 1-day diary to assess the specific duration of the CISC (time from when the equipment and environment are brought together to perform CISC) and the next day to complete a second diary for the total duration of the CISC (starting when the patient intent to self-catheterize to the return to the initial activity, including the displacement, and gathering the required device). Adherence, difficulties with CISC, and quality of life were measured with validated questionnaires: Intermittent Catheterization Satisfaction Questionnaire, Intermittent Catheterization Difficulty Questionnaire, Intermittent Catheterization Adherence Scale, and SF Qualiveen Questionnaire., Results: Thirty-six patients agreed to participate but only 25 patients completed the entire protocol. The participants performed CISC for an average of 7 years. The median specific duration of CISC was 2 min and 23 s (ranging from 47'' to 11'50''). The median total duration of CISC was 3 min and 40 s (1'35''; 18'47''). No significant correlation was found between the duration of CISC and patient characteristics, adherence, difficulty to self-catheterize, or quality of life., Conclusion: The time to perform CISC was brief, and less than 2-3 min on average. The impact on adherence and quality of life should be assessed in a larger cohort., (© 2021 Wiley Periodicals LLC.)
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- 2021
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19. Efficiency and satisfaction with telephone consultation of follow-up patients in neuro-urology: Experience of the COVID-19 pandemic.
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Chesnel C, Hentzen C, Le Breton F, Turmel N, Tan E, Haddad R, and Amarenco G
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- Adult, Aged, Female, Follow-Up Studies, Humans, Male, Middle Aged, Pandemics, Telephone, COVID-19, Patient Satisfaction, Remote Consultation, Urology
- Abstract
Aim: The COVID-19 pandemic led to limit patients' visits to the neuro-urology department. Telemedicine was seen as a pragmatic solution to provide follow-up care. This study aimed to assess the efficiency and satisfaction of a telephone consultation in neuro-urology., Methods: During the pandemic, the scheduled medical visits were converted into telephone consultation. For each teleconsultation, the physician assessed the efficiency and the patient-rated global satisfaction of the teleconsultation. The physician and the patient assessed whether this teleconsultation replaced a physical visit., Results: About 358 neurologic patients were included in the study. The mean efficiency of the telephone consultation was 9.3/10 (±1.5). The mean global satisfaction was 9.0/10 (±1.3). The majority of the patients (52.4%) would prefer a physical consultation. 90.2% might convert some clinic visits to teleconsultations in the future. No agreement was found between the patient and the physician when they were asked if the teleconsultation replaced the physical consultation initially scheduled (weight kappa = 0.02; 95% confidence interval = [-0.06 to 0.11]). Cognitive impairment, difficulty to obtain relevant information, and lack of physical examination were unfavorable to the efficiency of the teleconsultation. Cognitive impairment, embarrassing nature of the teleconsultation, and preference for a physical consultation were unfavorable to satisfaction of the patient., Conclusion: Telemedicine in neuro-urology was associated with a high satisfaction of the patients and was described as efficient by the physicians. Despite this, the majority of the patients reported a preference for physical consultation. The COVID-19 pandemic might be an opportunity to refine our practices in neuro-urology and to develop telemedicine., (© 2021 Wiley Periodicals LLC.)
- Published
- 2021
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20. External Anal Sphincter Fatigability: An Electromyographic and Manometric Study in Patients With Anorectal Disorders.
- Author
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Grasland M, Turmel N, Pouyau C, Leroux C, Charlanes A, Chesnel C, Breton FL, Sheikh-Ismael S, Amarenco G, and Hentzen C
- Abstract
Background/aims: External anal sphincter (EAS) plays an important role in fecal and gas voluntary continence. Like every muscle, it can be affected by repeated efforts due to fatigability (physiological response) and/or fatigue (pathological response). No standardized fatiguing protocol and measure method to assess EAS fatigability has existed. The aim is to test a simple, standardized protocol for fatiguing and measuring EAS fatigability and fatigue to understand better the part of EAS fatigability in the pathophysiology of fecal incontinence., Methods: Patients with anorectal disorders evaluated with anorectal manometry were included. They had to perform 10 repetitions of maximum voluntary contraction (MVC) of 20 seconds. Measurement was made with an anorectal manometry catheter and a surface recording electromyography (EMG). The primary outcome was the difference in EMG root mean square between the first and the last MVC. Secondary outcomes were differences in other EMG and manometry parameters between the first and the last MVC. Difficulties and adverse effects were recorded., Results: Nineteen patients underwent the fatiguing protocol. All patients completed the entire protocol and no complications were found. No difficulty was declared by the examiner. A significant decrease in root mean square was found between the first and last MVC (0.01020 ± 0.00834 mV vs 0.00661 ± 0.00587 mV; P = 0.002), in maximum anal pressure area under the curve of continuous recordings of anal pressure and mean and total EMG power (P < 0.05)., Conclusions: This protocol is simple and minimally invasive to measure EAS fatigue and fatigability. We highlighted a fatigue of EAS in many patients with anorectal disorders.
- Published
- 2021
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21. Relationship between desire to void and bladder capacity and rectal sensory function in patients with multiple sclerosis and anorectal disorders.
- Author
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Pouyau C, Grasland M, Leroux C, Chesnel C, Turmel N, Sheikh Ismael S, Le Breton F, Amarenco G, and Hentzen C
- Subjects
- Adult, Aged, Anal Canal physiopathology, Constipation physiopathology, Female, Humans, Male, Manometry, Middle Aged, Rectum physiopathology, Sensation physiology, Urodynamics physiology, Defecation physiology, Fecal Incontinence physiopathology, Multiple Sclerosis physiopathology, Urinary Bladder physiopathology, Urination physiology
- Abstract
Aims: The primary aim of this study was to assess the relationship between a strong desire to void (SDV) and rectal sensory function in patients with multiple sclerosis (PwMS) and anorectal disorders. The secondary aim was to identify clinical, urodynamic or manometric factors associated with greater rectal sensory function impairment in this population., Methods: Thirty PwMS (mean age 49.2 ± 10.9 years) with anorectal disorders (constipation and/or fecal incontinence) participated in this observational study. Rectal sensory parameters during anorectal manometry were recorded at a strong desire to void and after urination (PV, post-void). The primary outcome was the desire to defecate volume. Secondary outcomes were first perception and maximum tolerated threshold volumes, presence and modulation of recto-anal inhibitory reflex., Results: The mean desire to defecate volume was 125 ± 59 mL at SDV and 104 ± 64 mL at PV (P < .001). The mean maximum tolerated volume was 167 ± 61 mL at SDV vs 141 ± 64 mL after urination (P = .01). The other parameters were not different between SVD and PV conditions. No predictive factors for greater impairment of rectal sensory function were identified., Conclusion: This study suggests a relationship between bladder sensation and thus bladder capacity, and rectal sensory function in PwMS and with anorectal disorders., (© 2020 Wiley Periodicals, Inc.)
- Published
- 2020
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22. Time to be Ready to Void: A new tool to assess the time needed to perform micturition for patients with multiple sclerosis.
- Author
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Hentzen C, Villaumé A, Turmel N, Miget G, Le Breton F, Chesnel C, and Amarenco G
- Subjects
- Adult, Aged, Female, Humans, Male, Middle Aged, Mobility Limitation, Multiple Sclerosis complications, Observer Variation, Orthopedic Equipment, Sensation, Time Factors, Time and Motion Studies, Urinary Bladder, Overactive etiology, Multiple Sclerosis physiopathology, Severity of Illness Index, Urinary Bladder, Overactive physiopathology, Urination
- Abstract
Background: Urgency urinary incontinence is one of the major disabling urinary symptoms in people with multiple sclerosis (PwMS). The warning time (time from first sensation of urgency to voiding or incontinence) only partially reflects the possibility of continence. Other factors such as mobility, difficulties in transfer or undressing can influence this time., Objectives: The aim was to create a specific test for PwMS to assess the global time required to be ready to perform micturition and to assess its reliability., Methods: The Time to be Ready to Void (TRV) was based on 2 timed steps: "mobility" stage, including standing up and walking 6m to the toilet, and the "settled" stage, starting as soon as the individual opens the toilet door until readiness for micturition. All participants performed the TRV twice. Reliability were assessed by the intraclass correlation coefficient (ICC) and convergent validity by Spearman correlation coefficient., Results: We included 71 PwMS (mean [SD] age 54.4 [11.7] years). Inter-rater reliability was excellent for the TRV mobility stage (ICC: 0.97), settled stage (ICC: 0.99) and total test (ICC: 0.99). Test-retest reliability was good for the mobility stage (ICC: 0.88) and total test (ICC: 0.81) and moderate for the settled stage (ICC: 0.67). Test-retest reliability assessed by a Likert-type scale was good for each stage (κ 0.75 and 0.88). The mobility stage was correlated with the scores for the Timed Up and Go test, 10-Meter Walk Test, and Tinetti Mobility Test (ρ=0.89; ρ=0.88; ρ=-0.67, respectively; P<0.0001) and the settled stage with scores for the Tinetti Mobility Test, Functional Independence Measure and Nine Hold Peg test (right) (ρ=-0.48; ρ=-0.36; ρ=0.31, respectively; P<0.01). Comprehension, acceptance and relevance were rated good by most participants (97%, 95% and 90%, respectively)., Conclusion: The TRV is a new tool to measure the global time needed to be ready to achieve micturition in PwMS. It seems useful in clinical practice for overactive bladder in addition to the classical warning time because it takes into account all the time needed to accomplish micturition (mobility, undressing, installation)., (Copyright © 2020 Elsevier Masson SAS. All rights reserved.)
- Published
- 2020
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23. Effect of a strong desire to void on walking speed in individuals with multiple sclerosis and urinary disorders.
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Hentzen C, Turmel N, Chesnel C, Charlanes A, Le Breton F, Sheikh Ismaël S, and Amarenco G
- Subjects
- Adult, Female, Gait Disorders, Neurologic etiology, Gait Disorders, Neurologic physiopathology, Humans, Lower Urinary Tract Symptoms drug therapy, Lower Urinary Tract Symptoms etiology, Lower Urinary Tract Symptoms physiopathology, Male, Middle Aged, Multiple Sclerosis complications, Multiple Sclerosis physiopathology, Severity of Illness Index, Time and Motion Studies, Urodynamics, Lower Urinary Tract Symptoms psychology, Multiple Sclerosis psychology, Urination, Volition, Walking Speed
- Abstract
Background: Lower urinary tract symptoms, especially overactive bladder, are frequent and disabling in individuals with multiple sclerosis (IwMS). An association with gait disorders is common, which could aggravate continence difficulties and affect quality of life. The association between the need to void and walking has never been studied in this population., Objective: The primary aim of this study was to assess the effect of a strong desire to void (SDV) on walking speed in IwMS and lower urinary tract symptoms. The secondary aim was to identify clinical or urodynamic factors associated with walking speed impairment at SDV in this population., Methods: We included IwMS with urinary disorders and Expanded Disability Status Scale score<7 in this observational study. Individuals underwent 3 10-m walk tests (10MWT) and one Timed Up and Go (TUG) test at SDV and at post-void (PV)., Results: Among the 72 IwMS included (mean [SD] age 50.6 [11.6] years; 46 [64%] females), the mean (SD) speed for 10MWT was 1.00 (0.31) m.s
-1 at SDV and 1.07 (0.30) m.s-1 at PV (P<0.0001). Time for TUG was also increased when individuals felt SDV: mean 11.53 (4.6) sec at SDV versus 10.77 (3.8) sec at PV (P=0.004). No predictors of greater impairment of walking speed at SDV were identified., Conclusion: This study suggests a clinical impact of bladder sensation on walking speed in IwMS and urinary disorders. None of the individual characteristics could predict greater decrease in gait velocity at SDV., (Copyright © 2020 Elsevier Masson SAS. All rights reserved.)- Published
- 2020
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24. What criteria affect a patient's choice of catheter for self-catheterization?
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Hentzen C, Turmel N, Chesnel C, Miget G, Le Breton F, Charlanes A, Tan E, and Amarenco G
- Subjects
- Adult, Aged, Female, Humans, Male, Middle Aged, Self Care, Surveys and Questionnaires, Intermittent Urethral Catheterization, Patient Preference, Self-Management, Urinary Catheters
- Abstract
Aim: The aim was to determine which criteria are most influential in guiding the patient's choice of catheter during clean intermittent self-catheterization (CISC) education., Methods: A questionnaire exploring five traits (catheter design, catheter length, the comfort of use, nurse's explanations, and how easy it was to carry and dispose of the catheter) was administered to all patients who succeeded in performing CISC. The patients had to report the criterion that most influenced their choice, and rate the importance of each criterion from 1 to 4 on a Likert scale (strongly disagree, somewhat disagree, somewhat agree, strongly agree). The study assessed the impact that age, sex, etiology, dependency, motor or sensory upper limb deficiency, and position required to perform CISC may have had on the importance of the different criteria., Results: Seventy-three patients were included (mean age, 50.9 ± 14.3 years). The most important criterion was the nurse's explanations (44%), followed by comfort of handling (32%), the discreet aspect of carrying the catheter (15%), and catheter length (7%). The esthetic aspect was not important for 34% of patients, whereas all the other criteria were important for at least 82% of patients. The comfort of handling was more often a priority for those with motor or sensory upper limb disorders (P < .01). The other characteristics of the patients did not impact the way they prioritized the criteria., Conclusion: These results highlight the importance of extensive training for nurses involved in CISC education, as their explanations have the greatest impact on the patient's choice of the catheter., (© 2019 Wiley Periodicals, Inc.)
- Published
- 2020
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25. Influence of the urine stream interruption exercise on micturition.
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Chesnel C, Charlanes A, Tan E, Turmel N, Breton FL, Ismael SS, Hentzen C, and Amarenco G
- Subjects
- Adult, Female, Humans, Middle Aged, Pelvic Floor physiology, Prospective Studies, Exercise Therapy adverse effects, Pelvic Floor Disorders rehabilitation, Urination
- Abstract
Objectives: To assess the effect of urine stream interruption exercise on micturition., Methods: This study was conducted prospectively in female patients without urinary disorders. Two uroflowmetries were performed: one during a usual micturition and one during an exercise of urine stream interruption. For the urine stream interruption exercise the subject was asked to begin the micturition, to stop it at 3 s, when the stream is interrupted, to start voiding again, then again stop it at 3 s and repeat this manoeuvre until the end of the micturition., Results: Twenty female patients (mean age 38.7 years old, SD 12.3) were included. Post void residual volume was higher after the urine stream interruption micturition (mean 36.7 mL, SD 46.6) than during standard micturition (mean 8.2 mL, SD 24.1) (P = 0.02). During normal voiding, the maximal flow rate was higher (26.9 mL/min vs 17.8 mL/min; P < 0.0001). There was no difference concerning neither the voiding volume nor the slope of ascending part of flow curve. During urine stream interruption micturition, the flow rate slope, the voiding volume and the maximal flow rate by voiding sequence were decreasing as the voiding sequences followed each other., Conclusions: Urine stream interruption increases the post-void residual volume and translates into less efficient micturition. Thus, it should not be used in current practice of pelvic floor muscles training., (© 2019 The Japanese Urological Association.)
- Published
- 2019
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26. Use of a specific questionnaire and perineal electromyography to assess neuropathic pain after radical retropubic prostatectomy.
- Author
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Turmel N, Ismael SS, Chesnel C, Charlanes A, Hentzen C, Le Breton F, and Amarenco G
- Abstract
Objective: Prostate cancer is the most frequent cancer in men and radical retropubic prostatectomy (RRP) is one of the first-line treatment. However, RRP has some side effects and can lead to chronic perineal pain. The objective of the study was to determine in patients suffering from perineal pain after RRP the possibility of a neurogenic damage by means of a specific questionnaire dedicated to track down neuropathic pain., Methods: Forty patients were explored by a specific and validated questionnaire, the Neuropathic Pain Symptom Inventory (NPSI). Patients were divided into two groups: Group A with an NSPI score ≥4 was considered as suffering from neuropathic pain, and Group B was considered as a control group without neuropathic pain (NSPI score <4). All patients had a perineal electrophysiological testing to confirm the possibility of a neurogenic damage., Results: Group A was composed by 13 men and Group B by 27 men, with mean age 72.45 years and mean duration of pain 2.7 years. In Group A, the most frequent symptoms were burning sensation, electrical shock and numbness. Location of the pain was global perineal area (8/13), anus (10/13), penis (5/13) and glans penis (2/13). Electromyography (EMG) findings confirmed the presence of denervation and neurogenic damages compared with controls ( p < 0.001)., Conclusion: One third of the patients consulting for chronic pain following RRP had probably a neuropathic lesion leading to a chronic perineal pain as suggested by an NSPI score ≥ 4 and EMG alterations., (© 2019 Editorial Office of Asian Journal of Urology. Production and hosting by Elsevier B.V.)
- Published
- 2019
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27. Lower urinary tract symptoms treatment constraints assessment (LUTS-TCA): a new tool for a global evaluation of neurogenic bladder treatments.
- Author
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Turmel N, Lévy P, Hentzen C, Chesnel C, Charlanes A, Sheikh-Ismael S, Amarenco G, and Manceau P
- Subjects
- Adult, Female, Humans, Lower Urinary Tract Symptoms complications, Male, Middle Aged, Prospective Studies, Urinary Bladder, Neurogenic complications, Lower Urinary Tract Symptoms therapy, Patient Compliance statistics & numerical data, Urinary Bladder, Neurogenic therapy
- Abstract
Objectives: To develop a new tool to assess constraints due to urinary treatments in neurological patients., Materials and Methods: A prospective, monocentric study has been conducted from January to May 2017. Out-patients (multiple sclerosis, spinal cord injury, Parkinson disease) were included in a referral center if they had LUTS treatment for at least 3 months. To validate psychometric properties, we conducted a literature review, qualitative interviews, and discussion with a panel of six experts. Comprehension, acceptation, and pertinence were tested by a pilot study. A validation study, designed to calculate content validity, internal consistency reliability, and test-retest reliability [intraclass correlation coefficient (ICC)] has been conducted. The primary outcome was good psychometric properties defined with Cronbach's α > 0.7 and ICC > 0.7., Results: Comprehension, acceptation, and pertinence were excellent. Validation study showed a perfect content validity (r2 = 1) and excellent internal consistency reliability (Cronbach' α = 0.90). Total score was between 0 (best score) to 66 (maximal constraints). Test-retest reliability calculated using ICC was 0.81. Time to fill questionnaire was 4 min 20 s. The final version was composed by 22 items., Conclusion: LUTS TCA is the first validated tool to assess constraints of urinary treatment and has excellent psychometric properties.
- Published
- 2019
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28. Lower Urinary Tract Symptoms in Elderly Population With Multiple Sclerosis.
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Chesnel C, Charlanes A, Hentzen C, Turmel N, Le Breton F, Ismael SS, and Amarenco G
- Abstract
Purpose: The aim of this study is to compare the clinical and urodynamic characteristics of urinary disorders in multiple sclerosis (MS) patients in a geriatric population with a nongeriatric population., Methods: This study was conducted retrospectively between 2010 and 2016. Each patient with MS aged 65 and older was matched with 2 patients with MS aged less than 65 in sex, form of MS, and Expended Disability Status Scale (EDSS). Demographic data, urinary symptoms, treatment, quality of life, repercussion of lower urinary tract symptoms on daily life activities and psychological state and urodynamic parameters were collected. Differences between the 2 populations were evaluated using Student test, chi-square, or Fischer tests., Results: Twenty-four patients with MS aged 65 and older (mean age, 69.8 years) were matched with 48 patients aged less than 65 years (mean age, 49.4 years). Maximum urethral closure pressure was lower in the elderly population than in the nongeriatric population (mean±standard deviation [SD]: 35.6±18.5 cm H
2 O vs. 78.2±52.3 cm H2 O, P<0.001). In the male population, there was no statistical difference in any other clinical or urodynamic endpoints. In the female population, voiding symptoms was more described in the nongeriatric population (Urinary Symptom Profile low stream: 3.4±3.5 vs. 1.7±2.4, P=0.04), geriatric population had less urinary treatment (P=0.05). LUTS had less impact on quality of life (Qualiveen: 1.4±1.0 vs. 2.1±0.9, P=0.02) on the geriatric population than in the nongeriatric of female MS patients., Conclusions: Geriatric population of MS has few differences of urinary disorders compared to a nongeriatric population with EDSS, sex, and MS form equal. However, the psychological impact of these urinary disorders is less important in female geriatric population.- Published
- 2018
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29. Urinary Disorders and Marfan Syndrome: A Series of 4 Cases.
- Author
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Hentzen C, Turmel N, Chesnel C, Le Breton F, Sheikh Ismael S, and Amarenco G
- Subjects
- Adolescent, Adult, Aortic Dissection complications, Aortic Dissection therapy, Aorta surgery, Female, Humans, Infant, Male, Marfan Syndrome therapy, Middle Aged, Quality of Life, Spinal Cord Injuries complications, Spinal Cord Injuries therapy, Spinal Nerve Roots pathology, Treatment Outcome, Urinary Bladder, Neurogenic physiopathology, Urinary Bladder, Overactive physiopathology, Urologic Diseases therapy, Marfan Syndrome complications, Urinary Bladder, Neurogenic complications, Urinary Bladder, Overactive complications, Urologic Diseases complications
- Abstract
Marfan syndrome is a genetic disease responsible for causing cardiovascular, eye and musculoskeletal damages. Urinary disorders are not common. We present 4 cases of chronic urinary tract symptoms, with 2 different pathophysiological processes. Three patients presented with spinal cord infarct following aortic dissection surgery. They were affected by an overactive bladder with detrusor overactivity and detrusor-sphincter dyssynergia. One patient complained of voiding dysfunction, possibly related to dural ectasia. Although a rare outcome, urinary disorders may appear in Marfan syndrome, by the occurrence of surgical complications in aortic surgery or possibility of sacral nerve root compression. If so, medical care is necessary to prevent uro-nephrological complications., (© 2017 S. Karger AG, Basel.)
- Published
- 2018
- Full Text
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30. Actions of intravenous magnesium on ventricular arrhythmias caused by acute myocardial infarction.
- Author
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Nattel S, Turmel N, Macleod R, and Solymoss BC
- Subjects
- Animals, Arrhythmias, Cardiac etiology, Coronary Disease complications, Dogs, Female, Heart Conduction System drug effects, Heart Conduction System physiopathology, Hypercalcemia complications, Magnesium blood, Magnesium Chloride administration & dosage, Male, Tachycardia drug therapy, Tachycardia etiology, Ventricular Function drug effects, Arrhythmias, Cardiac drug therapy, Magnesium pharmacology, Myocardial Infarction complications
- Abstract
Although the antiarrhythmic properties of magnesium are well recognized, its mechanisms of antiarrhythmic action are poorly understood. This study was designed to characterize the effects of magnesium on ventricular tachyarrhythmias related to acute myocardial infarction (MI) in dogs. When the circumflex coronary artery was occluded repeatedly for 10 min at 30-min intervals, ventricular fibrillation (VF) occurred in 30, 35 and 33% of dogs during occlusions 1, 2 and 3, respectively. Magnesium pretreatment reduced the incidence of VF to 14% during occlusion 3 (P less than .05 compared to occlusions without magnesium pretreatment). Neither the prevalence of ventricular ectopic complexes 24 h after MI nor arrhythmia inducibility 4 days after infarction were significantly altered by i.v. magnesium. Magnesium significantly attenuated the ST segment elevation (an index of ischemic injury) and ventricular conduction slowing caused by MI. Because magnesium has been reported to reverse the effects of hyperkalemia, we evaluated the role of this action by infusing potassium directly into a coronary artery (to mimic ischemia-induced hyperkalemia) and administered i.v. magnesium. Potassium infusion markedly slowed intraventricular conduction, an effect fully reversed by discontinuing potassium administration but unaffected by i.v. magnesium. We conclude that magnesium has antiarrhythmic actions only during the early phases of an experimental MI, and that these actions are associated with attenuation of indices of ischemic injury and conduction slowing. These properties of magnesium are similar to those of calcium antagonists, and suggest that magnesium's calcium antagonist properties may be important in its antiarrhythmic actions.
- Published
- 1991
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