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Transversus abdominis plane block reduces morphine use and pain after kidney removal surgery in patientsNerve block cuts morphine use after kidney removal surgery

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Key Takeaway
TAP blocks significantly reduce morphine use and pain after nephrectomy while lowering GI side effects without delaying recovery.

This systematic review analyzed data from 639 patients undergoing nephrectomy to evaluate the impact of transversus abdominis plane blocks. The primary analysis focused on intravenous morphine equivalents required at 24 hours post-surgery. Results demonstrated a significant reduction in opioid consumption for the block group compared to controls, with a mean difference of -16.67 units.

Pain management outcomes were assessed at multiple time points throughout the 24-hour follow-up period. Resting pain scores showed statistically significant improvements at six, twelve, and twenty-four hours after the procedure. Active pain scores were also consistently lower in the intervention group across all measured intervals, indicating effective analgesia during movement.

Safety and recovery metrics revealed no prolongation in time to first analgesia or length of hospital stay. Furthermore, the incidence of postoperative gastrointestinal adverse reactions was notably reduced in patients receiving the block. These findings suggest that this regional anesthesia technique offers a safe and effective alternative for managing post-nephrectomy pain.

If you or someone you love is facing kidney removal surgery, here's some good news. A new analysis of past studies found that a simple nerve block given before the operation can significantly cut the amount of morphine needed afterward. Patients who got the block used about 16.67 mg less morphine in the first 24 hours compared to those who didn't. That's a meaningful reduction in a strong opioid.

The block, called a transversus abdominis plane block (TAPB), is an injection of numbing medicine into the abdominal wall. The analysis looked at data from 639 patients across several studies. Besides needing less morphine, patients who got the block also reported lower pain scores at rest and during movement at most time points over 24 hours. And they had fewer gastrointestinal side effects, like nausea and vomiting, which are common after surgery.

However, the block didn't speed up hospital discharge or delay the first time patients asked for pain relief. The results are promising, but the analysis combined data from different studies with varying methods, so the findings should be interpreted with caution. Still, for patients undergoing nephrectomy, TAPB appears to be a safe and effective way to manage pain and reduce opioid use.

What this means for you:
A nerve block before kidney removal reduces morphine use and pain for 24 hours.

Study Details

Study typeMeta analysis
EvidenceLevel 1
PublishedJun 2026
View Original Abstract ↓
To systematically evaluate the effect of transversus abdominis plane block (TAPB) on postoperative analgesia after nephrectomy. A computerised search was conducted to identify randomised controlled trials (RCTs) evaluating TAPB for postoperative analgesia after nephrectomy from database inception to 31 January 2026 in the Cochrane Library, PubMed, Embase, Web of Science, China Biomedical Literature Service, Wanfang Data, and the China National Knowledge Infrastructure. Two researchers independently screened the literature, extracted data, and assessed the risk of bias of the included studies. Meta-analysis was performed using Review Manager 5.4. The quality of evidence was graded using the GRADEpro system, and publication bias for endpoint indicator was assessed using Stata 17.0. Ten RCTs involving a total of 639 patients were included. The meta-analysis showed that, compared with the control group, the TAPB group demonstrated a significant reduction in intravenous morphine equivalents at 24-hour postoperative [MD = −16.67, 95% CI (−25.57, −7.77), p < 0.001]. Resting pain scores were significantly lower at 6-hour (p = 0.003), 12-hour (p < 0.001), and 24-hour (p = 0.020) postoperatively, although the difference at 2-hour (p = 0.160) and 4-hour (p = 0.100) was not statistically significant. Active pain scores were lower at 2-hour (p = 0.020), 4-hour (p < 0.001), 6-hour (p < 0.001), 12-hour (p = 0.002), and 24-hour (p < 0.001) postoperatively. TAPB did not prolong the time to first analgesia (p = 0.120) or postoperative hospital stay (p = 0.200), and it reduced the incidence of postoperative gastrointestinal adverse reactions (p < 0.001). Except for the absence of significant differences in resting pain scores at 2 and 4 hours postoperative, TAPB might reduce postoperative pain after nephrectomy, decreased postoperative opioid consumption, lowered postoperative pain scores, and reduced gastrointestinal adverse reactions.
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