Canadian Journal of Anesthesia-Journal Canadien D Anesthesie最新文献

Purpose: This Continuing Professional Development module aims to help the general anesthesiologist recognize common pitfalls in ambulatory pediatric adenotonsillectomy and perform appropriate risk stratification, analgesic management, and disposition planning.

Principal findings: Pediatric adenotonsillectomy is a widely performed procedure. An updated approach to preoperative risk assessment of commonly associated comorbidities allows the practitioner to anticipate and plan for adverse events. Risks include obstructive sleep apnea, airway hyperresponsiveness, asthma, recent upper respiratory tract infections, obesity, and young age. Risk-modifying interventions consist of delaying surgery, preoperative bronchodilator therapy, recognizing the limitations of volatile agents, and referral of high-risk patients to specialized pediatric centres. Appropriate selection of intraoperative and postoperative analgesia can optimize patient comfort, avoid readmission, and limit adverse events such as postoperative hemorrhage or respiratory depression.

Conclusions: Ambulatory pediatric adenotonsillectomy is a common surgical procedure, performed both in the community as well as tertiary care pediatric centres. To optimize outcomes in this heterogenous patient population, anesthesiologists must risk stratify and anticipate perioperative respiratory adverse events.

Overview: The Guidelines to the Practice of Anesthesia-Revised Edition 2025 (the Guidelines) were prepared by the Canadian Anesthesiologists' Society (CAS), which reserves the right to determine the publication and distribution of the Guidelines. The Guidelines are subject to revision and updated versions are published annually. The Guidelines supersede all previously published versions of this document. Although the CAS encourages Canadian anesthesiologists to adhere to its practice guidelines to ensure high-quality patient care, the CAS cannot guarantee any specific patient outcome. Anesthesiologists should exercise their own professional judgement in determining the proper course of action for any patient's circumstances. The CAS assumes no responsibility or liability for any error or omission arising from the use of any information contained in its Guidelines to the Practice of Anesthesia.

Purpose: The management of pain following cancer-related surgeries involves the use of opioid analgesics. Nevertheless, there is little evidence characterizing the utility and prescription patterns of opioids after these procedures. Our primary aim was to identify patients from three types of cancer surgery who were overprescribed with opioids. The secondary aim was to determine the potential predictors of overprescribing in the same period.

Methods: We conducted the study at a single cancer referral hospital. Opioid-naïve patients with breast, gynecologic, or head and neck cancer were studied. Patients were considered opioid-naïve if they had a history of opioid use ≤ 30 mg oral morphine equivalent daily dose for less than seven days in the preceding three months before surgery. We recruited eligible participants by convenience sampling on the wards until at least 102 patients were included in the final analysis. After discharge, we followed up on the participants on day 7 via telephone using a structured proforma including questions to identify the last date and amount of opioid dose taken. The equivalent days of opioid use were calculated by their 24-hr use before discharge and the number of doses prescribed for discharge. Our primary outcome was the prevalence of overprescribing in the three surgical specialties defined as the number of patients taking less than 50% of discharge opioids within the first seven days after discharge. We examined the predictors on incidents of overprescribing using multivariable Poisson regression as the secondary outcome.

Results: We recruited 119 patients, and 107 patients were included in the final analysis. There were 59/107 (55%) patients found to be overprescribed with opioids. At discharge, they exhibited lower mean numerical rating scale pain scores, lower mean pain severity scores, higher equivalent days of opioids prescribed, and not used opioids in the last 24 hr before discharge. The incidence of overprescribing was 2.4 times greater for patients prescribed with opioids without 24-hr opioid use (relative risk [RR], 2.38; 95% confidence interval [CI], 1.30 to 4.35; P = 0.005). Similarly, the incidence of overprescribing was 1.7 times greater for patients who had opioids 24 hr before discharge and were supplied with opioids for five equivalent days or more at the time of discharge (RR, 1.67; 95% CI, 1.09 to 2.56; P = 0.02).

Conclusion: Our study shows that the majority of recruited patients undergoing breast, gynecologic, or head and neck cancer surgery were overprescribed opioids. Individualized assessments on patients' 24-hr opioid requirements before discharge and supplying for less than five days are important considerations to reduce overprescribing in opioid-naïve patients after cancer surgery.

Purpose: Gender disparities in academia are a growing concern, impacting various disciplines, including health care. We aimed to investigate gender-based differences in academic performance, leadership roles, and academic distinction within anesthesiology and critical care medicine.

Source: We conducted electronic searches for relevant articles published in PubMed, CENTRAL, Scopus, Web of Science, Embase, Education Resources Information Center, PsychINFO, and ProQuest from database inception until 23 June 2024. Three researchers conducted blinded assessments using predefined inclusion and exclusion criteria, with discrepancies resolved through discussion. We reported descriptive statistics for quantitative data from the included research articles.

Principal findings: Our initial screening identified 37,311 studies, 71 of which met the specified inclusion criteria and were therefore evaluated. Analysis of academic publishing trends revealed a gradual increase in the proportion of women as coauthors, first authors (in anesthesiology, the increase ranged from 7% to 17%, and in critical care medicine the increase was 4%), last authors, and corresponding authors. Despite these improvements, women remain underrepresented on the editorial boards of top journals. Although an increase in the representation of women as abstract presenters at conferences was noted, gender disparities persist in senior authorship roles.

Conclusion: Gender disparities are evident in academic leadership positions within anesthesiology and critical care medicine, with few women holding editor-in-chief positions and underrepresentation of women on editorial boards. We observed similar gaps in departmental and scientific society leadership roles. The distribution of awards, prizes, and grants remains skewed, indicating persistent gender imbalances in academic distinction. While progress has been made in certain areas, substantial gaps persist in scholarly publishing, leadership, and academic distinction.

Study registration: PROSPERO ( CRD42022377524 ); first submitted 20 November 2022.

Purpose: Intraoperative hypoglycemia is presumed to be rare, but generalizable multicentre incidence and risk factor data for adult patients are lacking. We used a multicentre registry to characterize adults with intraoperative hypoglycemia and hypothesized that intraoperative insulin administration would be associated with hypoglycemia.

Methods: We conducted a cross-sectional retrospective multicentre cohort study. We searched the Multicenter Perioperative Outcomes Group registry to identify adult patients with intraoperative hypoglycemia (glucose < 3.3 mmol·L^-1 [< 60 mg·dL^-1]) from 1 January 2015 to 31 December 2019. We evaluated characteristics of patients with intraoperative glucose measurements and with intraoperative hypoglycemia.

Results: Of 516,045 patients with intraoperative glucose measurements, 3,900 (0.76%) had intraoperative hypoglycemia. Diabetes mellitus and chronic kidney disease were more common in the cohort with intraoperative hypoglycemia. The odds of intraoperative hypoglycemia were higher for the youngest age category (18-30 yr) compared with the odds for every age category above 40 yr (odds ratio [OR], 1.57-3.18; P < 0.001), and were higher for underweight or normal weight patients compared with patients with obesity (OR, 1.48-2.53; P < 0.001). Parenteral nutrition was associated with lower odds of hypoglycemia (OR, 0.23; 95% confidence interval [CI], 0.11 to 0.47; P < 0.001). Intraoperative insulin use was not associated with hypoglycemia (OR, 0.996; 95% CI, 0.91 to 1.09; P = 0.93).

Conclusion: In this large cross-sectional retrospective multicentre cohort study, intraoperative hypoglycemia was a rare event. Intraoperative insulin use was not associated with hypoglycemia.

Purpose: Safe perioperative management of patients undergoing transcatheter aortic valve implantation (TAVI) is crucial. Remimazolam is a newly developed short-acting benzodiazepine. We hypothesized that combining remimazolam and flumazenil would reduce emergence time compared with sevoflurane in patients undergoing general anesthesia for TAVI.

Methods: We conducted a prospective, randomized, parallel-design, open-label, single-centre clinical trial between June 2022 and August 2023 at Kagoshima University Hospital. We allocated patients randomly to either the remimazolam/flumazenil group or the sevoflurane group. Patients in the remimazolam group received iv remimazolam whereas patients in the sevoflurane group received sevoflurane for general anesthesia maintenance. Patients in both groups received a remifentanil infusion throughout the TAVI procedure (0.2 μg·kg^-1·min^-1 iv). Remimazolam and sevoflurane were adjusted to maintain a Bispectral Index™ (Covidien/Medtronic, Minneapolis, MN, USA) of 40-60. In the remimazolam group, flumazenil (0.2 mg iv) was administered immediately after remimazolam discontinuation. The primary outcome was time to extubation. Secondary outcomes included intraoperative variables (hemodynamic variables and vasopressor dose), rate of intra- and postoperative complications, and recovery of muscle strength.

Results: Overall, 60 patients were enrolled, and data from 56 were included. The median [interquartile range] time to extubation was significantly shorter in the remimazolam group than in the sevoflurane group (6.5 [5.1-8.1] min vs 14.2 [10.9-15.9] min; difference in medians, -6.9 min; 95% confidence interval, -8.7 to -5.0; P < 0.001). Statistically significant differences were observed in the perfusion index (P = 0.03) and regional cerebral oxygen saturation (P = 0.03) between the groups. No significant differences between the two groups were seen in other secondary outcomes.

Conclusions: Compared with sevoflurane, a combination of remimazolam and flumazenil significantly reduced the time to extubation in patients undergoing general anesthesia for TAVI. Therefore, remimazolam may be a suitable choice for general anesthesia in patients undergoing TAVI.

Study registration: UMIN.ac.jp ( UMIN000047892 ); first posted 30 May 2022.

Purpose: During the COVID-19 pandemic, neighbourhoods with high material deprivation and high proportions of racialized Canadians were disproportionately affected by COVID-19. Many of these neighbourhoods were served by community hospitals. We sought to compare the burden of COVID-19 care in community and academic intensive care units (ICUs) in Ontario, Canada.

Methods: We included all adult patients admitted to Ontario ICUs with COVID-19 between 1 March 2020 and 31 July 2021 in a retrospective cohort study. We compared patient volumes, demographics, interventions, and outcomes between community hospital corporations (CHCs) and academic hospital corporations (AHCs).

Results: During the first three waves of the pandemic, 9,651 adult ICU admissions for COVID-19 were reported across 72 hospital corporations in Ontario: 6,902 (71.5%) in CHCs and 2,749 (28.5%) in AHCs. Days of ICU care per baseline ICU bed were highest in large CHCs (> 10 baseline ICU beds) relative to AHCs and small CHCs (median [interquartile range], 73.7 [53.8-110.6] vs 42.2 [32.7-71.8] vs 21.4 [7.2-40.3]; Kruskal-Wallis test, P < 0.001). Among direct ICU admissions, CHC patients had greater severity of illness whereas among transfer ICU admissions, AHC patients were more severely ill. In a multivariable logistic regression model, mortality was similar among patients with index admission to a CHC or AHC; however, patients with index admission to an AHC were more likely to receive extracorporeal membrane oxygenation (adjusted odds ratio, 6.16; 95% confidence interval, 4.72 to 8.11).

Conclusion: During the pandemic, Ontario's large CHCs provided significantly more days of ICU COVID-19 care per baseline ICU bed compared with AHCs and small CHCs. Equipping large CHCs to handle ICU surges during future emerging disease outbreaks should be a priority for pandemic preparedness.