Do anaesthetists believe their teaching is evidence-based?

BACKGROUND: Knowledge translation (KT) and evidence-based practice are widely referenced in clinical medicine, with parallel calls for clinical teaching to better reflect best educational practice. How clinical teachers use medical education theory and evidence is largely unknown. AIMS: To explore anaesthetists' attitudes to clinical teaching and medical education theory and evidence: whether they use it, what sources they access and attitudes to possible barriers to its use. METHODS: Data were collected from anaesthetists via on-line questionnaire. RESULTS: 364 anaesthetists (19% response rate) completed the questionnaire. Respondents preferentially approach colleagues and access short courses or workshops to improve their teaching. Twenty-eight percent reported consciously using medical education theory or evidence often or regularly, with 24% having never done so; 52% have never accessed any medical education article; and only 21% have read an article from a medical education journal. Lack of available time due to clinical commitments was the major barrier identified to greater use of medical education evidence and theory. CONCLUSION: A "knowledge-practice gap" does appear to exist in anaesthesia teaching in spite of the improved medical education evidence base. KT methodology may provide a guide to improving clinician engagement with medical education.

Predicting recovery and disability after surgery in patients with severe obesity: The role of the six-minute walk test.

The most appropriate method to predict postoperative outcomes in patients with severe obesity undergoing elective non-bariatric surgery is not known. We conducted a single-centre prospective cohort study in patients with a body mass index of at least 35 kg/m2 undergoing non-bariatric, non-cardiac surgery. Patients completed the six-minute walk test prior to surgery. Disability was measured before and six months after surgery using the World Health Organization disability assessment schedule. Primary outcome measures included quality of recovery at one month and significantly increased disability at six months after surgery. A total of 293 patients participated. The median body mass index was 41 kg/m2. Patients generally recovered well. Following surgery, 9% of patients experienced a poor quality of recovery and 7% developed a significant increase in disability. The proportion of patients free from clinically significant disability increased from 66% prior to surgery to 90% at six months after surgery. The distance walked in six minutes was weakly predictive of poor recovery at one month and significantly increased disability at six months; weight and body mass index were not. The area under the receiver operating characteristic curve was 0.65 (95% confidence intervals 0.51 to 0.78) for poor recovery and 0.64 (95% confidence intervals 0.51 to 0.77) for increased disability. A preoperative six-minute walk test distance of 308 m was the best cut-off value for predicting increased postoperative disability (sensitivity 0.68, specificity 0.63). The six-minute walk test was most discriminatory at shorter distances. This population of patients with severe obesity appeared to recover well and had few adverse outcomes. The degree of functional capacity was more important than the degree of obesity in predicting postoperative outcomes.

Preoperative assessment and prehabilitation in patients with obesity undergoing non-bariatric surgery: A systematic review.

STUDY OBJECTIVE: The optimal methods of preoperative assessment and prehabilitation specific to patients with obesity undergoing non-bariatric surgery have not been described. We investigated two questions: 1) which methods of preoperative assessment in patients with obesity are associated with improved patient management, and 2) which methods of prehabilitation in patients with obesity are associated with improved patient outcomes? DESIGN: Systematic review. SETTING: Preoperative assessment and optimisation, and postoperative outcomes. PATIENTS: Patients with obesity scheduled for surgery of any type. INTERVENTIONS: We searched six electronic databases for clinical studies addressing either preoperative assessment or preoperative optimisation. MEASUREMENTS: The primary outcome measure for the assessment review was any impact on preoperative disease diagnosis or progression, or postoperative complications. The primary outcome measure for the prehabilitation review was any postoperative change in disease or health status, or any medical or surgical complications. MAIN RESULTS: Twenty one papers were included in the assessment review (total of 5090 participants) and twenty five for prehabilitation (30,170 participants). Approximately two thirds of papers reported on bariatric surgery populations. In the assessment review, studies reported on either the preoperative detection of comorbidities or the prediction of postoperative complications. The only assessment tool with any suggestion of benefit was polysomnography. A range of methods of prehabilitation were found for question 2. Forty eight percent of papers reported improvement in some or all study outcomes. The most successful intervention was exercise, with 4 of 5 exercise-based trials showing improvement in either some or all postoperative outcomes. CONCLUSIONS: There is a limited body of work addressing preoperative assessment and prehabilitation specific to surgical patients with obesity, especially when undergoing non-bariatric surgery. Preoperative polysomnography was shown to improve both the diagnosis of obstructive sleep apnoea and the prediction of postoperative complications. Half of the prehabilitation studies showed evidence of benefit. From this review, we were unable to make strong recommendations as to best practice in patients with obesity presenting for non-bariatric surgery.

Surgical prehabilitation using mobile health coaching in patients with obesity: A pilot study.

Many patients spend months waiting for elective procedures, and many have significant modifiable risk factors that could contribute to an increased risk of perioperative morbidity and mortality. The minimal direct contact that usually occurs with healthcare professionals during this period represents a missed opportunity to improve patient health and surgical outcomes. Patients with obesity comprise a large proportion of the surgical workload but are under-represented in prehabilitation studies. Our study piloted a mobile phone based, multidisciplinary, prehabilitation programme for patients with obesity awaiting elective surgery. A total of 22 participants were recruited via the Wollongong Hospital pre-admissions clinic in New South Wales, Australia, and 18 completed the study. All received the study intervention of four text messages per week for six months. Questionnaires addressing the self-reported outcome measures were performed at the start and completion of the study. Forty percent of participants lost weight and 40% of smokers decreased their cigarette intake over the study. Sixty percent reported an overall improved health score. Over 80% of patients found the programme effective for themselves, and all recommended that it be made available to other patients. The cost was A$1.20 per patient per month. Our study showed improvement in some of the risk factors for perioperative morbidity and mortality. With improved methods to increase enrolment, our overall impression is that text message-based mobile health prehabilitation may be a feasible, cost-effective and worthwhile intervention for patients with obesity.

Impact of body mass index on utilization of selected hospital resources for four common surgical procedures.

BACKGROUND: Evidence about the impact of obesity on surgical resource consumption in the Australian setting is equivocal. Our objectives were to quantify the prevalence of obesity in four frequently performed surgical procedures and explore the association between body mass index (BMI) and hospital resource utilization including procedural duration, length of stay (LOS) and costs. METHODS: A retrospective cohort study of patients undergoing four surgical procedures at a tertiary referral centre in New South Wales, between 1 January 2016 and 31 December 2016, was conducted. The four surgical procedures were total hip replacement, laparoscopic appendectomy, laparoscopic cholecystectomy and hysteroscopy with dilatation and curettage. Surgical groups were stratified according to BMI category. RESULTS: A total of 699 patients were included in the study. The prevalence of obesity was significantly higher than local and national population estimates for all procedures except appendectomy. BMI was not associated with increased hospital resource utilization (procedural, anaesthetic or intensive care stay duration) in any of the four surgical procedures examined after controlling for age, gender and complexity. For other outcomes of hospital resource utilization (LOS and cost), the relationship was inconsistent across the four procedures examined. A high BMI was positively associated with higher LOS, medical costs and allied health costs in those who underwent an appendectomy, and critical care costs in those who underwent laparoscopic cholecystectomy. CONCLUSION: Obesity was common in patients undergoing four frequently performed surgical procedures. The relationship between BMI and hospital resource utilization appears to be complex and varies across the four procedures examined.