79 results on '"Schultz, Timothy J."'
Search Results
52. Hospital nurse staffing models and patient and staff-related outcomes
- Author
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Butler, Michelle, primary, Collins, Rita, additional, Drennan, Jonathan, additional, Halligan, Phil, additional, O'Mathúna, Dónal P, additional, Schultz, Timothy J, additional, Sheridan, Ann, additional, and Vilis, Eileen, additional
- Published
- 2011
- Full Text
- View/download PDF
53. Mapping the limits of safety reporting systems in health care —what lessons can we actually learn?
- Author
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Thomas, Matthew J W, primary, Schultz, Timothy J, additional, Hannaford, Natalie, additional, and Runciman, William B, additional
- Published
- 2011
- Full Text
- View/download PDF
54. Energetics of bluetongue lizards (Tiliqua scincoides) in a seasonal tropical environment
- Author
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Christian, Keith A., Webb, Jonathan K., Schultz, Timothy J., Christian, Keith A., Webb, Jonathan K., and Schultz, Timothy J.
- Abstract
We studied the physiological ecology of bluetongue lizards (Tiliqua scincoides) on the Adelaide River floodplain in tropical Australia to determine the seasonal patterns of energy expenditure and to determine the mechanisms by which seasonal differences were achieved. Field metabolic rates (FMR) were significantly lower in the dry season (37.6 kJ kg -1 day -1; n=9) than in the wet (127.3 kJ kg -1 day -1; n=7). Water flux was also lower in the dry season (6.8 ml kg -1 day -1; n=9) than in the wet (39.4 ml kg -1 day -1; n=7). Measurements of body temperatures ( T b) and movements of free-ranging animals, and standard metabolic rate (SMR) of recently caught animals, allowed a detailed analysis of energy budgets for wet and dry seasons. In the dry, bluetongue lizards expended 90 kJ kg -1 day -1 less energy than in the wet season. Unlike some other lizards of the wet-dry tropics, SMR did not differ between seasons. About 5% of the seasonal difference in FMR was due to lower night time T b during the dry season, and about 7% was due to lower diurnal T b. The remaining 88% of the decrease in energy expended in the dry season was due to a substantial decrease in other costs that may include reproduction, growth, digestion and activity. If we assume the animals fed daily and the costs of digestion are taken into account, the estimates are: 14% of the savings result from lower T b at night, 20% from lower T b in the day, and 66% result from decreased activity. It is therefore apparent that, unlike some agamid and varanid lizards that use a combination of behavioural and physiological mechanisms to conserve energy when food and water are limited, bluetongue lizards primarily use behavioural mechanisms to achieve a dramatic reduction in energy expenditure in the dry season.
- Published
- 2003
55. Mapping the Alzheimer's Disease Clinical Trial Space
- Author
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Schultz, Timothy J., additional
- Full Text
- View/download PDF
56. Oxygen transfer during aerobic exercise in a varanid lizard Varanus mertensi is limited by the circulation
- Author
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Frappell, P., Schultz, Timothy J., Christian, Keith A., Frappell, P., Schultz, Timothy J., and Christian, Keith A.
- Abstract
Oxygen transfer during sustained maximal exercise while locomoting on a treadmill at 0.33 m s(-1) was examined in a varanid lizard Varanus mertensi at 35degreesC. The rate of oxygen consumption ((V)over dot (O 2)) increased with locomotion from 3.49+/-0.75 (mean+/-S.D.) to 14.0+/-4.0 ml O-2 kg(-1) min(-1). Ventilation (V-E) increased, aided by increases in both tidal volume and frequency, in direct proportion to (V)over dot(O 2). The air convection requirement ((V)over dot(E)/(V)over dot(O 2)=27) was therefore maintained, together with arterial Pa-CO 2 and Pa-O 2. The alveolar-arterial P-O 2 difference (PA(O 2)-Pa-O 2) also remained unchanged during exercise from its value at rest, which was approximately 20 mmHg. Pulmonary diffusion for carbon monoxide (0.116+/-0.027 ml kg(-1) min(-1) mmHg(-1)) was double the value previously reported in V. exanthematicus and remained unchanged with exercise. Furthermore, exercise was associated with an increase in the arterial-venous O-2 content difference (Ca-O2-Cv(O 2)), which was assisted by a marked Bohr shift in the hemoglobin saturation curve and further unloading of venous O-2. During exercise the increase in cardiac output ((Q)over dot(tot)) did not match the increase in (V)over dot(O2) such that the blood convection requirement ((Q)over dot(tot)/(V)over dot (O 2)) decreased from the pre-exercise value of approximately 35 to 16 during exercise. Together, the results suggest that ventilation and O-2 transfer across the lung are adequate to meet the aerobic needs of V. mertensi during exercise, but the decrease in the blood convection requirement in the presence of a large arterial-venous O-2 content difference suggests that a limit in the transport of O-2 is imposed by the circulation.
- Published
- 2002
57. The respiratory system in varanid lizards: determinants of O2 transfer
- Author
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Frappell, P. B., Schultz, Timothy J., Christian, Keith A., Frappell, P. B., Schultz, Timothy J., and Christian, Keith A.
- Abstract
Varanids in general exhibit greater aerobic capacities than other lizards. In a similar approach to the extensive investigations undertaken in mammals, the respiratory system in varanids is examined in terms of oxygen transfer from the air to the blood during rest and sustained locomotory activity. The parameters controlling the transfer Of O-2 through the various steps of the respiratory system are appropriate to meet the maximum demands for oxygen with one possible exception, circulatory convection. Ventilatory convection is maintained during maximal aerobic locomotion ensuring adequate pulmonary ventilation and the protection of alveolar P-O2, Little evidence exists to indicate a mechanically imposed constraint to breathe and the possibility of a gular pump acting to assist ventilation, as a general feature of varanids remains to be determined. Alterations in the relative contributions of the ventilation-perfusion ratio, pulmonary diffusion, diffusion equilibrium and right-left shunts preserved the alveolar-arterial P-O2 difference, ensuring that arterial oxygenation was maintained. In those species where increases in cardiac output were limited, maximum O-2 transfer was achieved through increased extraction of oxygen at the tissues. Overall, the interrelationship of adjacent steps in the respiratory system ensures that one step cannot become limiting. Compensatory changes occur in various parameters to offset those parameters that are 'limited'. The high aerobic activity of varanid lizards would not be achievable without a compensated circulatory convection.
- Published
- 2002
58. Hospital nurse staffing models and patient and staff-related outcomes
- Author
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Butler, Michelle, primary, Collins, Rita, additional, Drennan, Jonathan, additional, Halligan, Phil, additional, O'Mathúna, Dónal P, additional, Schultz, Timothy J, additional, Sheridan, Ann, additional, and Vilis, Eileen, additional
- Published
- 2008
- Full Text
- View/download PDF
59. Energetic consequences of metabolic depression in tropical and temperate-zone lizards
- Author
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Christian, Keith A., Bedford, Gavin S., Schultz, Timothy J., Christian, Keith A., Bedford, Gavin S., and Schultz, Timothy J.
- Abstract
One response of ectothermic animals to periods of inactivity is inverse acclimation, or metabolic depression, which results in the conservation of energy. Most studies of metabolic depression and acclimation have involved temperate-zone species, and the information from tropical species has been largely restricted to laboratory studies that failed to demonstrate thermal acclimation of metabolism. Recently, metabolic depression has been shown in several species of reptiles from the wet-dry tropics of northern Australia during the dry season. We review existing data on the energy budgets of temperate and tropical species during periods of inactivity and make calculations of energy saved due to metabolic depression across a range of temperatures. Because tropical species experience relatively high temperatures during periods of inactivity, they have a greater potential for energy savings, any enhancement of their metabolic depression is disproportionately advantageous with respect to energy savings, and in some species metabolic depression is probably essential for survival. Thus, we would expect metabolic depression to be well developed in some tropical reptiles. The lack of thermal acclimation in laboratory studies indicates that environmental parameters other than temperature (such as food or water) may initiate metabolic depression in tropical species. Higher temperatures, however, magnify the energy savings accomplished by metabolic depression.
- Published
- 1999
60. Physiological ecology of a tropical dragon, Lophognathus temporalis
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Christian, Keith A., Bedford, Gavin S., Green, Brian, Griffiths, Anthony D., Newgrain, K., Schultz, Timothy J., Christian, Keith A., Bedford, Gavin S., Green, Brian, Griffiths, Anthony D., Newgrain, K., and Schultz, Timothy J.
- Abstract
Lophognathus temporalis is an arboreal lizard from the wet–dry tropics of Australia. During the wet season the field metabolic rate (FMR) of the lizards was 209 kJ kg-1 d-1, but during the dry season FMR was only 62 kJ kg-1 d-1. Similarly, water flux decreased from 73.6 mL kg-1 d-1 in the wet season to 18.5 mL kg-1 d-1 in the dry season. Body temperatures (Tb) were significantly lower in the dry season, and operative temperatures, calculated by incorporating microclimatic data with characteristics of the lizards, indicated that the seasonal shift was due to changes in thermoregulatory behaviour rather than limitations of the thermal environment. By combining field measurements of Tb and FMR with laboratory measurements of standard metabolic rate over a range of Tb, we were able to subdivide the FMR into its components and to determine which factors contributed to the seasonal reduction in energy expenditure. During the dry season, lizards used 147 kJ kg-1 d-1 less energy than during the wet season, and 24% of this decrease was estimated to be due to the passive effects of lower nighttime Tb, 14% was due to the active selection of lower daytime Tb, 27% was due to the physiological shift to lower standard metabolic rates, and 35% was due to reduced activity in the dry season. Although the population size remained relatively constant (107 lizards ha-1 during the wet season and 125 lizards ha-1 during the dry season), the population structure changed, reflecting the seasonal patterns of recruitment and mortality. The number of lizards active at any one time was much lower in the dry season, reflecting the lower levels of activity in this season. The energy expenditure of the population of L. temporalis was 612 kJ ha-1 d-1 during the wet season and 113 kJ ha-1 d-1 during the dry season.
- Published
- 1999
61. Energetics and water flux of the marbled velvet gecko (Oedura marmorata) in tropical and temperate habitats
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Christian, Keith A., Bedford, Gavin S., Green, Brian, Schultz, Timothy J., Newgrain, K., Christian, Keith A., Bedford, Gavin S., Green, Brian, Schultz, Timothy J., and Newgrain, K.
- Abstract
The gecko Oedura marmorata was studied in two different climatic zones: the arid zone of central Australia and in the wet-dry tropics of northern Australia. Doubly labelled water was used to measure field metabolic rate (FMR) and water flux rates of animals in the field during the temperate seasons of spring, summer and winter, and during the tropical wet and dry seasons. FMRs were highest in the tropical wet season and lowest in the temperate winter. The geckos in central Australia expended less energy than predicted for a similarly sized iguanid lizard, but geckos from the tropics expended about the same amount of energy as predicted for an iguanid. Water flux rates of geckos from the arid zone were extremely low in all seasons compared to other reptiles, and although water flux was higher in tropical geckos, the rates were low compared to other tropical reptiles. The standard metabolic rates (SMRs) of geckos were similar between the two regions and among the seasons. Geckos selected higher body temperatures (T bs) in a laboratory thermal gradient in the summer (33.5°C) and wet (33.8°C) seasons compared to the winter (31.7°C) and dry (31.4°C) seasons. The mean T bs selected in the laboratory thermal gradient by geckos from the two regions were not different at a given time of year. The energy expended during each season was partitioned into components of resting metabolism, T b and activity. Most of the energy expended by geckos from central Australia could be attributed to the effects of temperature on resting lizards in all three seasons, but the energy expended by tropical geckos includes a substantial component due to activity during both seasons. This study revealed variability in patterns of ecological energetics between populations of closely related geckos, differences which cannot be entirely attributed to seasonal or temperature effects.
- Published
- 1998
62. Energetics of bluetongue lizards ( Tiliqua scincoides ) in a seasonal tropical environment
- Author
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Christian, Keith A., primary, Webb, Jonathan K., additional, and Schultz, Timothy J., additional
- Published
- 2003
- Full Text
- View/download PDF
63. The respiratory system in varanid lizards: determinants of O2 transfer
- Author
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Frappell, Peter B, primary, Schultz, Timothy J, additional, and Christian, Keith A, additional
- Published
- 2002
- Full Text
- View/download PDF
64. Knowledge translation in health care: a concept analysis.
- Author
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khoddam, Homeira, Mehrdad, Neda, Peyrovi, Hamid, Kitson, Alison L., Schultz, Timothy J., and Athlin, Asa Muntlin
- Subjects
MEDICAL literature ,HEALTH practitioners ,THEMATIC analysis - Abstract
Background: Although knowledge translation is one of the most widely used concepts in health and medical literature, there is a sense of ambiguity and confusion over its definition. The aim of this paper is to clarify the characteristics of KT. This will assist the theoretical development of it and shape its implementation into the health care system Methods: Walker and Avant's framework was used to analyze the concept and the related literature published between 2000 and 2010 was reviewed. A total of 112 papers were analyzed. Results: Review of the literature showed that "KT is a process" and "implementing refined knowledge into a participatory context through a set of challenging activities" are the characteristics of KT. Moreover, to occur successfully, KT needs some necessary antecedents like an integrated source of knowledge, a receptive context, and preparedness. The main consequence of successful process is a change in four fields of healthcare, i.e. quality of patient care, professional practice, health system, and community. In addition, this study revealed some empirical referents which are helpful to evaluate the process. Conclusion: By aiming to portray a clear picture of KT, we highlighted its attributes, antecedents, consequences and empirical referents. Identifying the characteristics of this concept may resolve the existing ambiguities in its definition and boundaries thereby facilitate distinction from similar concepts. In addition, these findings can be used as a knowledge infrastructure for developing the KT-related models, theories, or tools. [ABSTRACT FROM AUTHOR]
- Published
- 2014
65. Energetic consequences of metabolic depression in tropical and temperate-zone lizards
- Author
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Christian, Keith A., primary, Bedford, Gavin S., additional, and Schultz, Timothy J., additional
- Published
- 1999
- Full Text
- View/download PDF
66. MAXIMUM LIKELIHOOD IMAGING.
- Author
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Schultz, Timothy J.
- Subjects
IMAGING systems ,IMAGE reconstruction ,IMAGE processing ,INFORMATION processing ,TECHNOLOGY ,SCIENCE - Abstract
Imaging science is a rich and vital area of science and technology in which information-theoretic methods can be and have been applied with great benefit. Maximum-likelihood methods can be applied to a variety of problems in image restoration and synthesis, and their application to the restoration problem for incoherent imaging has been discussed in great detail in this article. [ABSTRACT FROM AUTHOR]
- Published
- 1999
67. The respiratory system in varanid lizards: determinants of O2 transfer
- Author
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Frappell, Peter B., Schultz, Timothy J., and Christian, Keith A.
- Subjects
- *
RESPIRATORY organs , *REPTILES , *AEROBIC exercises - Abstract
Varanids in general exhibit greater aerobic capacities than other lizards. In a similar approach to the extensive investigations undertaken in mammals, the respiratory system in varanids is examined in terms of oxygen transfer from the air to the blood during rest and sustained locomotory activity. The parameters controlling the transfer of O2 through the various steps of the respiratory system are appropriate to meet the maximum demands for oxygen with one possible exception, circulatory convection. Ventilatory convection is maintained during maximal aerobic locomotion ensuring adequate pulmonary ventilation and the protection of alveolar PO2. Little evidence exists to indicate a mechanically imposed constraint to breathe and the possibility of a gular pump acting to assist ventilation, as a general feature of varanids remains to be determined. Alterations in the relative contributions of the ventilation–perfusion ratio, pulmonary diffusion, diffusion equilibrium and right–left shunts preserved the alveolar–arterial PO2 difference, ensuring that arterial oxygenation was maintained. In those species where increases in cardiac output were limited, maximum O2 transfer was achieved through increased extraction of oxygen at the tissues. Overall, the interrelationship of adjacent steps in the respiratory system ensures that one step cannot become limiting. Compensatory changes occur in various parameters to offset those parameters that are ‘limited’. The high aerobic activity of varanid lizards would not be achievable without a compensated circulatory convection. [Copyright &y& Elsevier]
- Published
- 2002
- Full Text
- View/download PDF
68. Nurse staffing models in medical‐surgical units of acute care settings: A cross‐sectional study.
- Author
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Assaye, Ashagre Molla, Wiechula, Richard, Schultz, Timothy J., and Feo, Rebecca
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CENSUS ,CHI-squared test ,CRITICAL care medicine ,FISHER exact test ,HOSPITAL wards ,PROPRIETARY hospitals ,WORKING hours ,MATHEMATICAL models ,MEDICAL cooperation ,PUBLIC hospitals ,QUESTIONNAIRES ,RESEARCH ,RESEARCH funding ,SELF-evaluation ,SHIFT systems ,PILOT projects ,THEORY ,CROSS-sectional method ,NURSE-patient ratio ,DATA analysis software ,DESCRIPTIVE statistics ,HOSPITAL nursing staff - Abstract
Background: Nurse staffing models have been developed across different countries to address nursing shortages and improve quality of nursing care. However, there is no published study that describes nurse staffing models in Ethiopian hospitals. Aims: To describe the existing staffing models for nursing practice in acute care units of two hospitals (one public and one private) in Ethiopia. Methods: A cross‐sectional study was conducted from July to December 2018. A self‐administered questionnaire was used to collect data such as shift patterns, hours worked, and number of patients cared for per shift. Unit‐level data on nurse staffing were collected using a checklist developed specifically for this study. Results: Fifty‐nine percent (59.9%) of participants reported that they worked six or seven days per week. On average, they worked 50 hours per week and 12% working over 60 hours per week. The number of patients they provided care for during their last shift ranged from four to 45 with an average of 13 patients. Conclusion: This study demonstrates that nurses working in acute care settings in Ethiopia are typically working more than 40 hours per week and caring for many patients per shift, which has the potential to impact patient safety. SUMMARY STATEMENT: What is already known about this topic? Nurse staffing is a critical factor affecting patient safety and nurse workforce outcomes.There are different staffing models in which staff are assigned to give care for patients in different healthcare settings but much of the research is from high‐income countries. What this paper adds? This paper describes nurse staffing in acute care settings in Ethiopia, a low‐income country. The number of patients for whom nurses provide care per shift, and the number of hours nurses provide care per week, is very high compared with other settings.Nurses work very long hours, often more than 50 hours per week.Many nurses routinely work six or seven days per week and on average nurses care for 13 patients per shift The implication of this paper: Hospital managers should ensure that working more than 40 hours or more than five days per week should not be routine.Hospital policy that addresses the maximum number of patients who receive care by one nurse is necessary.The findings of this study support the consideration of mandated nurse‐to‐patient ratios in Ethiopia. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
69. Diagnostic test accuracy of self-reported screening instruments in identifying frailty in community-dwelling older people: A systematic review
- Author
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Ambagtsheer, Rachel, Thompson, Mark, Archibald, Mandy, Mavourneen Casey, and Schultz, Timothy J.
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111702 Aged Health Care ,FOS: Health sciences ,3. Good health - Abstract
AIM: Against a backdrop of ageing populations worldwide, it has become increasingly important to identify frailty screening instruments suitable for community settings. Self-reported and/or administered instruments may offer significant simplicity and efficiency advantages over clinician-administered instruments but their comparative diagnostic test accuracy has yet to be systematically examined. The aim of this systematic review was to determine the diagnostic test accuracy of self-reported and/or self-administered frailty screening instruments against two widely accepted frailty reference standards (the Frailty Phenotype and the Frailty Index) within community-dwelling older adult populations. METHODS: We conducted a systematic search of the Embase, CINAHL, MEDLINE, PubMed, Web of Science, PEDro, PsycINFO, ProQuest Dissertations, Open Grey and GreyLit databases up to April 2017 (with an updated search conducted over MayJuly 2018) to identify studies reporting comparison of self-reported and/or selfadministered frailty screening instruments against an appropriate reference standard, with a minimum sensitivity threshold of 80% and specificity threshold of 60%. RESULTS: We identified 24 studies that met our selection criteria. Four self-reported screening instruments across three studies met minimum sensitivity and specificity thresholds. However, in most cases, study design considerations limited the reliability and generalisability of the results. Additionally, metaanalysis was not conducted because no more than three studies were available for any of the unique combinations of index tests and reference standards. CONCLUSIONS: Although our study has demonstrated that a number of self-reported frailty screening instruments reported sensitivity and specificity within a desirable range for community application, additional diagnostic test accuracy studies are needed.
70. Diagnostic test accuracy of self-reported screening instruments in identifying frailty in community-dwelling older people: A systematic review
- Author
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Ambagtsheer, Rachel, Thompson, Mark, Archibald, Mandy, Mavourneen Casey, and Schultz, Timothy J.
- Subjects
111702 Aged Health Care ,FOS: Health sciences ,3. Good health - Abstract
AIM: Against a backdrop of ageing populations worldwide, it has become increasingly important to identify frailty screening instruments suitable for community settings. Self-reported and/or administered instruments may offer significant simplicity and efficiency advantages over clinician-administered instruments but their comparative diagnostic test accuracy has yet to be systematically examined. The aim of this systematic review was to determine the diagnostic test accuracy of self-reported and/or self-administered frailty screening instruments against two widely accepted frailty reference standards (the Frailty Phenotype and the Frailty Index) within community-dwelling older adult populations. METHODS: We conducted a systematic search of the Embase, CINAHL, MEDLINE, PubMed, Web of Science, PEDro, PsycINFO, ProQuest Dissertations, Open Grey and GreyLit databases up to April 2017 (with an updated search conducted over MayJuly 2018) to identify studies reporting comparison of self-reported and/or selfadministered frailty screening instruments against an appropriate reference standard, with a minimum sensitivity threshold of 80% and specificity threshold of 60%. RESULTS: We identified 24 studies that met our selection criteria. Four self-reported screening instruments across three studies met minimum sensitivity and specificity thresholds. However, in most cases, study design considerations limited the reliability and generalisability of the results. Additionally, metaanalysis was not conducted because no more than three studies were available for any of the unique combinations of index tests and reference standards. CONCLUSIONS: Although our study has demonstrated that a number of self-reported frailty screening instruments reported sensitivity and specificity within a desirable range for community application, additional diagnostic test accuracy studies are needed.
71. Morphological, functional and neurological outcomes of craniectomy versus cranial vault remodeling for isolated nonsyndromic synostosis of the sagittal suture: a systematic review
- Author
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Peter J. Anderson, Tim Schultz, May Thwin, Thwin, May, Schultz, Timothy J, and Anderson, Peter J
- Subjects
Male ,medicine.medical_specialty ,Population ,Craniosynostosis ,Craniosynostoses ,Postoperative Complications ,cranial vault remodeling ,craniectomy ,Cranial vault ,medicine ,Humans ,Postoperative Period ,education ,General Nursing ,education.field_of_study ,Cephalic index ,business.industry ,Skull ,sagittal synostosis ,Scaphocephaly ,Infant ,General Medicine ,Cranial Sutures ,Synostosis ,Plastic Surgery Procedures ,medicine.disease ,Surgery ,craniosynostosis ,Sagittal suture ,medicine.anatomical_structure ,Treatment Outcome ,suturectomy ,Child, Preschool ,Female ,calvarial remodeling ,business ,Tomography, X-Ray Computed ,Craniotomy - Abstract
Craniosynostosis is a condition characterized by the premature closure of one or more of the cranial vault sutures. It can occur alone or in association with other congenital defects and may be part of a syndrome. The sagittal suture is most commonly affected, comprising 40-60% of cases. Premature fusion of the sagittal suture can cause scaphocephaly due to compensatory anterior-posterior growth of the skull. This is morphologically considered as a narrow elongated skull with a decreased cephalic index, and is diagnosed clinically and/or radiologically. Both the indications for surgery and the techniques used have varied with time and location. Surgical techniques have evolved, from limited craniectomy to calvarial remodeling. In recent times a return to craniectomy methods has occurred with the more recent introduction of endoscopic methods.The objectives of this review were to identify and synthesize the best available evidence on the morphological, functional and neurological outcomes of craniectomy compared to cranial vault remodeling.This review considered studies of infants with primary isolated sagittal synostosis operated on or before the mean age of 24 months. The intervention of interest was local craniectomy and this was compared to cranial vault remodeling. Morphological (primary), functional and neurological (secondary) outcomes were included. Mortality, complications and aesthetic outcome were included as tertiary outcomes.A comprehensive search was undertaken across major databases. The retrieved studies were assessed by two independent reviewers for methodological validity prior to inclusion. Data was then extracted and, where possible, pooled in statistical meta-analysis. For descriptive studies, where statistical pooling was not possible, the findings are presented in narrative form.Search and retrieval: Based on critical appraisal, 27 studies were considered to be suitable for this review. These studies were all descriptive in nature. Meta-analysis was only possible for the primary morphological outcome (post-operative cephalic index).Morphological (cephalic index):At one year follow-up, post-operatively remodeling offers an advantage over craniectomy (Z = 4.16, P0.0001)Morphological:Improvements of the cephalic index to varying degrees were seen in patients receiving either procedure and there is not enough evidence to suggest that either treatment group had greater improvement over the other.Functional and neurological:Although their global scores may be comparable to an age-matched population, patients with sagittal synostosis who have undergone a surgical repair of any type may have discrepancies in specific domains and may be at risk of developing learning disorders. There is insufficient primary research with inter-procedure comparisons of preoperative and postoperative cognitive and neurological outcomes.Tertiary outcomes:There is not enough evidence to comment on mortality or postoperative infection in either treatment group. Patients undergoing cranial vault remodeling have a higher rate of transfusion compared to those undergoing craniectomy; however, it is likely that this difference relates to elective transfusion based on hospital-specific protocols. It remains unknown whether there is an inherently higher need for transfusion in patients undergoing remodeling procedures. Delaying surgery however may increase the risk of raised intracranial pressure (ICP) and its associated complications. Whilst there is no evidence for raised ICP post-craniectomy, a few studies have shown raised ICP in patients post-remodeling. There is not enough evidence to establish a relationship between both procedures and raised ICP. Aesthetic outcome appears to be "better" in patients who undergo remodeling; however, there is little rigorous evidence to support this hypothesis.Conclusions were drawn from both the meta-analysis and the narrative results.When comparing the mean change in cephalic index one year after surgery, remodeling was shown to be superior to limited craniectomy in patients with isolated synostosis of the sagittal suture. However both procedures were seen to give improvements at short, medium and longer term time points. Improvements in cephalic index may be sustained, deteriorate or improve over time; based on the current data neither procedure offers a clear long-term advantage over the other. Longer follow-up is required to compare outcomes at different time points.Patients who have surgery (any type) for isolated sagittal synostosis may have deficiencies in different subdomains at later school-age testing, whilst maintaining an age-appropriate global intelligence quotient (IQ) and school performance. There is no evidence to suggest that surgery of either type imparts any benefit in terms of functional or neurological outcomes.There is no evidence to suggest that surgery of either type imparts any benefit in terms of functional or neurological outcomes. While school performance and general IQ may be comparable to age-matched controls, patients with sagittal synostosis who have undergone surgical repair of any type may be at risk of deficiencies in sub-areas of testing and be at risk of learning disorders.There is insufficient evidence regarding mortality, infection, postoperative ICP and aesthetic outcome. While transfusion rates were greater in the remodeling group, this may be due to higher rates of elective transfusion.The inconclusive findings indicate an ongoing need for higher quality primary research comparing the morphological and functional outcomes of craniectomy and cranial vault remodeling in primary sagittal synostosis. Outcomes should be measured in both the short and long term.
- Published
- 2015
72. The prevention and reduction of weight loss in an acute tertiary care setting: protocol for a pragmatic stepped wedge randomised cluster trial (the PRoWL project)
- Author
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Leslye Long, Alison Kitson, Rick Wiechula, Stijn Soenen, Ian Chapman, Alison Shanks, Tim Schultz, Kitson, Alison L, Schultz, Timothy J, Long, Leslye, Shanks, Alison, Wiechula, Rick, Chapman, Ian, and Soenen, Stijn
- Subjects
evidence implementation ,Red tray ,nutritional decline ,Health administration ,law.invention ,Tertiary Care Centers ,Study Protocol ,Randomized controlled trial ,Clinical Protocols ,nursing ,law ,Weight loss ,Acute care ,Health care ,Outcome Assessment, Health Care ,South Australia ,Evidence implementation ,Cluster Analysis ,nutritional screening ,Nutritional screening ,Nutritional support ,Nutritional decline ,Nursing research ,Health Policy ,medicine.symptom ,medicine.medical_specialty ,knowledge translation ,red tray ,oral nutritional supplement ,nutritional support ,Oral nutritional supplement ,Nursing ,malnutrition ,Knowledge translation ,Feeding assistance ,Weight Loss ,medicine ,Humans ,Intensive care medicine ,Preventive healthcare ,business.industry ,MUST ,Malnutrition ,medicine.disease ,Stepped wedge ,stepped wedge ,feeding assistance ,Preventive Medicine ,business - Abstract
Background Malnutrition, with accompanying weight loss, is an unnecessary risk in hospitalised persons and often remains poorly recognised and managed. The study aims to evaluate a hospital-wide multifaceted intervention co-facilitated by clinical nurses and dietitians addressing the nutritional care of patients, particularly those at risk of malnutrition. Using the best available evidence on reducing and preventing unplanned weight loss, the intervention (introducing universal nutritional screening; the provision of oral nutritional supplements; and providing red trays and additional support for patients in need of feeding) will be introduced by local ward teams in a phased way in a large tertiary acute care hospital. Methods/Design A pragmatic stepped wedge randomised cluster trial with repeated cross section design will be conducted. The unit of randomisation is the ward, with allocation by a random numbers table. Four groups of wards (n = 6 for three groups, n = 7 for one group) will be randomly allocated to each intervention time point over the trial. Two trained local facilitators (a nurse and dietitian for each group) will introduce the intervention. The primary outcome measure is change in patient’s body weight, secondary patient outcomes are: length of stay, all-cause mortality, discharge destinations, readmission rates and ED presentations. Patient outcomes will be measured on one ward per group, with 20 patients measured per ward per time period by an unblinded researcher. Including baseline, measurements will be conducted at five time periods. Staff perspectives on the context of care will be measured with the Alberta Context Tool. Discussion Unplanned and unwanted weight loss in hospital is common. Despite the evidence and growing concern about hospital nutrition there are very few evaluations of system-wide nutritional implementation programs. This project will test the implementation of a nutritional intervention across one hospital system using a staged approach, which will allow sequential rolling out of facilitation and project support. This project is one of the first evidence implementation projects to use the stepped wedge design in acute care and we will therefore be testing the appropriateness of the stepped wedge design to evaluate such interventions. Trial registration ACTRN12611000020987
- Published
- 2013
73. Failures in transition: learning from incidents relating to clinical handover in acute care
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Natalie Hannaford, Tim Schultz, Matthew J. W. Thomas, William B. Runciman, Thomas, Matthew JW, Schultz, Timothy J, Hannaford, Natalie, and Runciman, William B
- Subjects
medicine.medical_specialty ,Critical Care ,research-quantitative ,incident classification systems ,adverse event ,Near miss ,Clinical handover ,Patient safety ,Documentation ,Acute care ,South Australia ,near misses ,patient safety ,Humans ,Medicine ,Risk management ,Quality of Health Care ,Risk Management ,Medical Errors ,business.industry ,Health Policy ,Patient Handoff ,Public Health, Environmental and Occupational Health ,acute ,medicine.disease ,error ,Handover ,Organizational Case Studies ,error reporting ,Patient Safety ,Medical emergency ,business - Abstract
The appropriate handover of patients, whereby responsibility and accountability of care is transferred between healthcare providers, is a critical component of quality healthcare delivery. This paper examines data from recent incidents relating to clinical handover in acute care settings, in order to provide a basis for the design and implementation of preventive and corrective strategies. A sample of incidents (n = 459) relating to clinical handover was extracted from an Australian health service's incident reporting system using a manual search function. Incident narratives were subjected to classification according to the system safety and quality concepts of failure type, error type, and failure detection mechanism. The most prevalent failure types associated with clinical handover were those relating to the transfer of patients without adequate handover 28.8% (n = 132), omissions of critical information about the patient's condition 19.2% (n = 88), and omissions of critical information about the patient's care plan during the handover process 14.2% (n = 65). The most prevalent failure detection mechanisms were those of expectation mismatch 35.7% (n = 174), clinical mismatch 26.9% (n = 127), and mismatch with other documentation 24.0% (n = 117). The findings suggest the need for a structured approach to handover with a recording of standardized sets of information to ensure that critical components are not omitted. Limitations of existing reporting processes are also highlighted. Refereed/Peer-reviewed
- Published
- 2013
74. Asthma self management education with either regular healthcare professional review or written action plans or both in adults
- Author
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Kristin Carson-Chahhoud, Ahad Ali, Malcolm P Brinn, Christopher Barton, Tim Schultz, Kelsey J Sharrad, Zoe Kopsaftis, Brian J. Smith, E. Haydn Walters, Roy, Anil, Schultz, Timothy J, Carson, Kristin V, Smith, Brian J, Powell, Heather, Wilson, Amanda, and Walters, E Haydn
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Medical education ,medicine.medical_specialty ,Self-management ,Health professionals ,business.industry ,asthma ,medicine.disease ,respiratory conditions ,self management ,Action (philosophy) ,Family medicine ,medicine ,Pharmacology (medical) ,business ,Asthma - Abstract
This is a protocol for a Cochrane Review (intervention). The objectives are as follows: To evaluate the effectiveness of asthma self management education, self monitoring and either: (1) regular review by a health care provider, or (2) use of a written action plan, or (3) both on patient outcomes. The specific questions addressed are: 1. Do asthma self management education, self monitoring and either regular review by a healthcare provider or use of a written action plan, or both, lead to improved outcomes in asthma? 2. What are the characteristics of those programmes that lead to measurable changes in health outcomes?
- Published
- 2011
75. Mapping the limits of safety reporting systems in health care - what lessons can we actually learn?
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Thomas, Matthew J W, Schultz, Timothy J, Hannaford, Natalie, and Runciman, William B
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safety management ,health care ,medical error - Abstract
Objectives: To assess the utility of Australian health care incident reporting systems and determine the depth of information available within a typical system. Design and setting: Incidents relating to patient misidentification occurring between 2004 and 2008 were selected from a sample extracted from a number of Australian health services' incident reporting systems using a manual search function. Main outcome measures: Incident type, aetiology (error type) and recovery (errordetection mechanism). Analyses were performed to determine category saturation. Results: All 487 selected incidents could be classified according to incident type. The most prevalent incident type was medication being administered to the wrong patient (25.7%, 125), followed by incidents where a procedure was performed on the wrong patient (15.2%, 74) and incidents where an order for pathology or medical imaging was mislabelled (7.0%, 34). Category saturation was achieved quickly, with about half the total number of incident types identified in the first 13.5% of the incidents. All 43 incident types were classified within 76.2% of the dataset. Fifty-two incident reports (10.7%) included sufficient information to classify specific incident aetiology, and 288 reports (59.1%) had sufficient detailed information to classify a specific incident recovery mechanism. Conclusions: Incident reporting systems enable the classification of the surface features of an incident and identify common incident types. However, current systems provide little useful information on the underlying aetiology or incident recovery functions. Our study highlights several limitations of incident reporting systems, and provides guidance MJA 2011; 194: 635-639 for improving the use of such systems in quality and safety improvement. Refereed/Peer-reviewed
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- 2011
76. Teams communicating through STEPPS
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Robert J. Adams, Christy J Pirone, Saravana Kumar, Tim Schultz, Karen Stead, Conrad A Wareham, Sue Tiver, Stead, Karen, Kumar, Saravana, Schultz, Timothy J, Tiver, Sue, Pirone, Christy J, Adams, Robert J, and Wareham, Conrad A
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Program evaluation ,Hospitals, Psychiatric ,safety ,Evidence-based practice ,Inservice Training ,Attitude of Health Personnel ,media_common.quotation_subject ,education ,Patient safety ,Nursing ,Patient-Centered Care ,Health care ,Medicine ,Humans ,Structured communication ,media_common ,Quality of Health Care ,Patient Care Team ,Teamwork ,business.industry ,communication ,Communication ,Australia ,General Medicine ,Mental health ,health care ,culture ,quality ,Evidence-Based Practice ,Models, Organizational ,Clinical Competence ,Safety ,teamwork ,business ,Seclusion ,Program Evaluation - Abstract
nor has it been introduced into a mental health care environment. We report here on a case study of the implementation of Team- STEPPS at an inpatient mental health facility in South Australia. We sought to determine whether the training intervention changed staff attitudes and behaviours and had an impact on patient care. Our aim was to evaluate the effectiveness of the intervention with measures developed to address three outcome constructs: observed team behav- iours; attitudes and opinions; and clinical performance and outcomes. 5 ABSTRACT Objective: To evaluate the effectiveness of the implementation of a TeamSTEPPS (Team Strategies and Tools to Enhance Performance and Patient Safety) program at an Australian mental health facility. Design, setting and participants: TeamSTEPPS is an evidence-based teamwork training system developed in the United States. Five health care sites in South Australia implemented TeamSTEPPS using a train-the-trainer model over an 8-month intervention period commencing January 2008 and concluding September 2008. A team of senior clinical staff was formed at each site to drive the improvement process. Independent researchers used direct observation and questionnaire surveys to evaluate the effectiveness of the implementation in three outcome areas: observed team behaviours; staff attitudes and opinions; and clinical performance and outcome. The results reported here focus on one site, an inpatient mental health facility. Main outcome measures: Team knowledge, skills and attitudes; patient safety culture; incident reporting rates; seclusion rates; observation for the frequency of use of TeamSTEPPS tools. Results: Outcomes included restructuring of multidisciplinary meetings and the introduction of structured communication tools. The evaluation of patient safety culture and of staff knowledge, skills and attitudes (KSA) to teamwork and communication indicated a significant improvement in two dimensions of patient safety culture (frequency of event reporting, and organisational learning) and a 6.8% increase in the total KSA score. Clinical outcomes included reduced rates of seclusion. Conclusion: TeamSTEPPS implementation had a substantial impact on patient safety culture, teamwork and communication at an Australian mental health facility. It encouraged a culture of learning from patient safety incidents and making
- Published
- 2009
77. Patient experiences and outcomes in a South Australian stand-alone Hospital in the Home program.
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Schultz TJ, Oster C, Pincombe A, Partington A, Taylor A, Gray J, Murray A, McInnes J, Ryan C, and Karnon J
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ObjectivesThis study aimed to compare clinical outcomes for patients admitted to Hospital in the Home (HITH) and traditional (bricks-and-mortar) hospitals and explore patient and carer experiences.MethodsA mixed methods approach including triangulation of quantitative and qualitative data was used. Quantitative outcomes were compared using augmented inverse propensity weighting to adjust for differences in patient characteristics between groups. Qualitative data was collected by focus groups and interviews and analysed using reflexive thematic analysis. The study took place in metropolitan Adelaide and one adjacent regional health network in 2020-22. Participants were patients discharged from either hospital setting with 1 of 22 eligible diagnoses. Hospital administrative data informed a comparison of outcomes that included mortality, rate of emergency department re-presentations and re-admissions, length of stay and incidence of complications.ResultsPatients treated in HITH were less unwell than traditional hospital patients. There were no safety or quality concerns identified in the clinical outcomes. Of 2095 HITH patients, the in-patient mortality rate was 0.2%, and 2.3% experienced a return to a bricks-and-mortar hospital during the HITH admission. For HITH patients, the mortality rate after 30days was lower (-1.3%, 95% CI -2 to -0.5, P=0.002), as were re-presentations in 28days (-7.2%, 95% CI -9.5 to -5, P<0.0001), re-admissions in 28days (-4.9%, 95% CI -6.7 to -3.2, P<0.001) and complications (-0.6%, 95% CI -0.8 to -0.5, P<0.001). Interviews of 35 patients and six carers found that HITH was highly accepted and preferred by patients. HITH was perceived to free up resources for other, more acutely unwell patients.ConclusionsHITH was preferred by patients and at least as effective in delivering quality health care as a traditional hospital, although the potential for unobserved confounding must be acknowledged.
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- 2024
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78. Issues and complexities in safety culture assessment in healthcare.
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Ellis LA, Falkland E, Hibbert P, Wiig S, Ree E, Schultz TJ, Pirone C, and Braithwaite J
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- Humans, Delivery of Health Care, Surveys and Questionnaires, Organizational Culture, Safety Management
- Abstract
The concept of safety culture in healthcare-a culture that enables staff and patients to be free from harm-is characterized by complexity, multifacetedness, and indefinability. Over the years, disparate and unclear definitions have resulted in a proliferation of measurement tools, with lack of consensus on how safety culture can be best measured and improved. A growing challenge is also achieving sufficient response rates, due to "survey fatigue," with the need for survey optimisation never being more acute. In this paper, we discuss key challenges and complexities in safety culture assessment relating to definition, tools, dimensionality and response rates. The aim is to prompt critical reflection on these issues and point to possible solutions and areas for future research., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Ellis, Falkland, Hibbert, Wiig, Ree, Schultz, Pirone and Braithwaite.)
- Published
- 2023
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79. Patient safety problems from healthcare information technology in medical imaging.
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Schultz TJ, Hannaford N, and Mandel C
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Health information technology (HIT) systems have been deployed extensively by healthcare organizations and promoted as a panacea to many of the challenges faced by medical imaging departments, particularly with respect to workflow, efficiency and diagnostic accuracy. This report describes how inadequate planning, integration, training and testing of HIT can impact on patient safety and result in patient harm.
- Published
- 2015
- Full Text
- View/download PDF
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