Single-Shot Lumbar Erector Spinae Plane Block in Total Hip Replacement: A Randomized Clinical Trial.

BACKGROUND: Lumbar erector spinae plane block (ESPB) has been proposed to relieve pain after total hip replacement (THR), but high-quality evidence is scarce. METHODS: This double-blinded (patient and assessor) randomized clinical trial, performed in 2 tertiary centers in Hong Kong, recruited patients undergoing primary unilateral THR under general anesthesia (GA) who received either single-shot ESPB at L1 (treatment arm) or no block (control arm). Patients were followed up on the first day postoperatively. We hypothesized that compared to no block, a single-shot lumbar ESPB at L1 would reduce postoperative fentanyl use and postoperative pain scores. Primary outcomes were intravenous fentanyl use at 12 and 24 hours postoperatively, along with pain intensity in numeric rating scale (0-10) at rest and upon movement on the first day postoperatively. Per-protocol analysis was performed. Mann-Whitney U test was used to compare the outcomes between both groups, and median difference was derived from the Hodges-Lehmann estimator. RESULTS: Seventy-one patients were randomized (n = 36 in treatment arm, n = 35 in control arm). The median amount of fentanyl consumed at 12 hours postoperatively was 210 (quartiles, 140.5-363) µg for the ESPB group and 165 (quartiles, 77.5-330.5) µg for the control group, while at 24 hours postoperatively, it was 409 (quartiles, 221-636.5) µg for the former and 349 (quartiles, 114-626.5) µg for the latter. The median differences in fentanyl consumption 12 and 24 hours postoperatively were 39 µg (95% confidence interval [CI], -40 to 116; P = .463) and 41 µg, respectively (95% CI, -83.5 to 199.5; P = .474), which were statistically insignificant. The median pain score at rest was 3 for both the ESPB group (quartiles, 0-5) and the control group (quartiles, 0-4.5), while upon movement, it was 7 for both the former (quartiles, 6-8) and the latter (quartiles, 4.5-8.5). The median difference in pain scores between both groups was 0 at rest (95% CI, -1 to 1; P = .890) and upon movement (95% CI, -1 to 1; P = .509). CONCLUSIONS: This trial did not demonstrate that ESPB at L1 improved analgesia following THR.

Attitudes, knowledge, and actions with regard to organ donation among Hong Kong medical students.

OBJECTIVE: To study attitudes, knowledge, and actions of local medical students with regard to organ donation and self-perceived confidence and competence in approaching potential organ donors. DESIGN: Cross-sectional questionnaire survey. SETTING: Faculty of Medicine, The University of Hong Kong, Hong Kong. PARTICIPANTS: Medical students, years 1-5. MAIN OUTCOME MEASURES: Knowledge on various aspects of organ donation was assessed, and students' self-evaluated competence and confidence about counselling for organ donation was evaluated. Factors influencing attitudes and actions were determined. RESULTS: The response rate was 94% (655/694). A majority (85%) had a 'positive' attitude, but only a small proportion (23%) had signed the organ donation card. Inconvenience and lack of knowledge about organ donor registration, and concerns about premature termination of medical treatment accounted for such discrepancies. Socio-cultural factors such as the traditional Chinese belief in preservation of an intact body after death, unease discussing death-related issues, and family objections to organ donation were significantly associated with a 'negative' attitude. Knowledge and action increased with medical education yet only a small proportion of medical students felt competent and confident in counselling patients on organ donation. CONCLUSIONS: The medical curriculum should increase medical students' awareness of the organ shortage problem. The donor registration system should be made more convenient and public education is recommended to correct misconceptions.