Canadian Journal of Surgery最新文献

Background: The status of the regional lymph node basin is of prognostic importance in patients with melanoma, making the performance of sentinel lymph node biopsies (SLNBs) a key component of patient care management, particularly with the advent of immunotherapy for adjuvant treatment. The primary goal of our study was to assess the false-negative rate of SLNBs among patients with melanoma.

Methods: We conducted a retrospective review of patients with melanoma undergoing SLNB by a single surgeon between Jan. 1, 2005, and Dec. 31, 2020. We extracted and cross-referenced patient demographic and pathologic information.

Results: During the study period, 501 patients underwent an SLNB. Of these, 97 (19.4%) patients had pathologically positive sentinel lymph nodes and 404 (80.6%) patients had negative results. The latter were subject to further review; 84 (20.8%) patients subsequently developed recurrence, with 25 (6.2%) recurrences within the primary nodal basin. Isolated regional recurrence occurred in 11 (2.7%) patients and conjunction with a false-negative rate was 10.2%. Unadjusted recurrence rates were similar across each lymph node basin, including the axilla (2.7%), groin (3.6%), and neck (1.4%).

Conclusion: The false-negative SLNB rate was 10.2% for isolated regional recurrences. These findings need to be considered in the era of using adjuvant systemic therapy for patients with melanoma.

Background: Prolonged packing of anorectal abscess cavities with internal dressings after incision and drainage is frequently used, but the efficacy of this practice remains controversial. Some studies highlight its use in hemostasis and preventing fistula and abscess recurrence, whereas others describe its economic burden and increase in pain. In this systematic review, we examine current evidence on the impact of packing after incision and drainage for anorectal abscesses.

Methods: The medical librarian conducted a comprehensive literature search on January 5, 2023. We conducted the meta-analysis using RevMan 5.4.1 software with a Mantel-Haenszel random-effects model.

Results: We identified 3 randomized controlled trials, comprising 490 patients. Of those, 241 patients (49%) received postoperative packing; most patients were male (n = 158, 65.6%), with a median age of 40.5 years and a follow-up of 6 months. Meta-analysis showed that prolonged wound packing was associated with delayed wound healing and increased pain, but no difference in abscess recurrence or fistula formation.

Conclusion: In this systematic review of current evidence highlighting the impact of packing after incision and drainage for anorectal abscesses, we found that the practice is not associated with significant differences in abscess recurrence and fistula formation, but is associated with increased postoperative pain and delayed wound healing.

Background: Use of extended pharmacologic thromboprophylaxis after major abdominopelvic cancer surgery should depend on best-available scientific evidence and patients' informed preferences. We developed a risk-stratified patient decision aid to facilitate shared decision-making and sought to evaluate its effect on decision-making quality regarding use of extended thromboprophylaxis.

Methods: We enrolled patients undergoing major abdominopelvic cancer surgery at an academic tertiary care centre in this pre-post study. We evaluated change in decisional conflict, readiness to decide, decision-making confidence, and change in patient knowledge. Participants were provided the appropriate risk-stratified decision aid (according to their Caprini score) in either the preoperative or postoperative setting. A sample size calculation determined that we required 17 patients to demonstrate whether the decision aid meaningfully reduced decisional conflict. We used the Wilcoxon matched-pairs signed ranks test for interval scaled measures.

Results: We included 17 participants. The decision aid significantly reduced decisional conflict (median decisional conflict score 2.37 [range 1.00-3.81] v. 1.3 [range 1.00-3.25], p < 0.01). With the decision aid, participants had high confidence (median 86.4 [range 15.91-100]) and felt highly prepared to make a decision (median 90 [range 55-100]). Median knowledge scores increased from 50% (range 0%-100%) to 75% (range 25%-100%).

Conclusion: Our risk-stratified, evidence-based decision aid on extended thromboprophylaxis after major abdominopelvic surgery significantly improved decision-making quality. Further research is needed to evaluate the usability and feasibility of this decision aid in the perioperative setting.

Background: The aim of our work was to examine differences between trauma patients in rural and urban areas who presented to a tertiary trauma centre in the province of Saskatchewan, Canada.

Methods: We identified a historical cohort of all level 1 trauma activations presenting to Royal University Hospital (RUH) from April 1, 2020, to March 31, 2022. We divided the cohort into 2 groups (urban and rural), according to the trauma location. The primary outcome of interest was 30-day mortality. Secondary outcomes of interest were hospital length of stay, readmission to hospital within 30 days of discharge, and complication rate.

Results: Trauma patients in rural areas were younger (34.1 v. 37 yr; p = 0.002) and more likely to be male (80.3% v. 74.4%; p = 0.040), with higher Injury Severity Scores (12.3 v. 8.3; p < 0.0001). Trauma patients in urban areas were more likely to sustain penetrating trauma (42.5% v. 28.5%; p < 0.0001). We saw no differences in morbidity and mortality between the 2 groups, but the rural trauma group had longer median lengths of stay (5 v. 3 d; p < 0.0007).

Conclusion: Although we identified key differences in patient demographics, injury type, and injury severity, outcomes were largely similar between the urban and rural trauma groups. This finding contradicts comparable studies within Canada and the United States, a difference that may be attributable to the lack of inclusion of prehospital mortality in the rural trauma group. The longer length of stay in trauma patients from rural areas may be attributed to disposition challenges for patients who live remotely.

SummaryCentralized referral systems have been successfully implemented to shorten and equalize surgical wait times; however, ongoing expenses make sustaining these projects challenging. We trialed a low-cost centralized booking project for hernia surgery in a community hospital from July to November 2019. Eligible patients (i.e., those with visible or palpable inguinal or umbilical hernias who were agreeable to an open mesh repair) were booked with the first available surgeon after initial consultation. Centrally booked patients with either inguinal or umbilical hernias waited a mean of 82 (standard deviation [SD] 32) and 80 (SD 66) days, respectively, while those who did not use the centralized system waited 137 (SD 89) and 181 (SD 92) days, respectively. Centralized booking increased operating room utilization as a larger pool of patients was available to call when last-minute cancellation occurred; centralized booking also effectively equalized wait-lists among 6 surgeons. Selective centralized booking is a promising concept that led to more efficient utilization of available operating room time with a significant decrease in wait times; this system could potentially improve access for all patients awaiting general surgery without requiring additional funding.

Background: Patients who require emergency general surgery (EGS) are at a substantially higher risk for perioperative morbidity and mortality than patients undergoing elective general surgery. The acute care surgery (ACS) model has been shown to improve EGS patient outcomes and cost-effectiveness. A recent systematic review has shown extensive heterogeneity in the structure of ACS models worldwide. The objective of this study was to describe the current landscape of ACS models in academic centres across Canada.

Methods: We sent an online questionnaire to the 18 academic centres in Canada. The lead ACS physicians from each institution completed the questionnaire, describing the structure of their ACS models.

Results: In total, 16 institutions responded, all of which reported having ACS models, with a total of 29 ACS services described. All services had resident coverage. Of the 29, 18 (62%) had dedicated allied health care staff. The staff surgeon was free from elective duties while covering ACS in 17/29 (59%) services. More than half (15/29; 52%) of the services described protected ACS operating room time, but only 7/15 (47%) had a dedicated ACS room all 5 weekdays. Four of 29 services (14%) had no protected ACS operating room time. Only 1/16 (6%) institutions reported a mandate to conduct ACS research, while 12/16 (75%) found ACS research difficult, owing to lack of resources.

Conclusion: We saw large variations in the structure of ACS models in academic centres in Canada. The components of ACS models that are most important to patient outcomes remain poorly defined. Future research will focus on defining the necessary cornerstones of ACS models.