Background
The use of transversus abdominus plane (TAP) blocks have come into vogue in recent times, with the ambition to reduce post-operative pain following laparoscopic cholecystectomy. TAP block is commonly performed using an ultrasound-guided approach (US-TAP), with emerging data indicating that laparoscopic-guided (L-TAP) approach may also be useful.
Aim
To perform a systematic review and meta-analysis of randomised clinical trials (RCTs) comparing outcomes following US-TAP and L-TAP block in patients undergoing laparoscopic cholecystectomy.
Methods
A systematic review was performed in accordance with PRISMA guidelines. Meta-analysis was performed using Review Manager version 5.4.
Results
6 RCTs including 428 patients were included. Overall, 212 patients were randomised to US-TAP (49.5 %) and 216 to L-TAP (50.5 %) respectively. A non-significant difference was observed between groups for mean age, gender, mean body mass indices, and American Society of Anesthesiologists grades (all P > 0.050). At meta-analyses, a non-significant difference was observed for US-TAP and L-TAP with respect to 2-, 6-, 12-, 24-, and 48-h post-operative visual analogue scores. A non-significant difference was also observed in relation to intraoperative duration, breakthrough opioid consumption, and post-operative vomiting, at meta-analysis. Patients who underwent US-TAP had longer anesthetic administration times (mean difference: 6.38, 95 % confidence interval: 2.77–10.00, P < 0.001) compared to those randomised to undergo L-TAP.
Conclusion
L-TAP and US-TAP provided similar post-operative pain scores, intraoperative duration, breakthrough opioid consumption, and post-operative vomiting following laparoscopic cholecystectomy. However, the time taken to perform L-TAP was significantly shorter. Should expertise allow, L-TAP should be considered in patients undergoing laparoscopic cholecystectomy.
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