Table 2.
Postoperative analgesics use based on when the plain TAP block was administered
| Variables | Overall (N = 262) |
Preoperative TAP (n = 240) |
Postoperative TAP (n = 22) |
P-value |
|---|---|---|---|---|
| PCA use, no. (%) | 213 (81.3) | 200 (83.3) | 13 (59.1) | 0.012 |
| PCA type | 0.003 | |||
| Morphine | 172 (65.6) | 165 (68.8) | 7 (31.8) | |
| Hydromorphone | 31 (11.8) | 26 (10.8) | 5 (22.7) | |
| Morphine + hydromorphone | 10 (3.8) | 9 (3.8) | 1 (4.5) | |
| PCA amount, MME, mean (SD) | ||||
| Morphine | 27.40 (57.37) | 27.09 (51.87) | 30.77 (101.32) | 0.019 |
| PCA duration, hours, mean (SD) | 33.97 (64.30) | 34.66 (66.22) | 26.36 (37.48) | 0.263 |
| IV opioid use, no. (%) | 54 (20.6) | 46 (19.2) | 8 (36.4) | 0.102 |
| IV opioid amount, mg, mean (SD) | 1.80 (10.39) | 1.38 (9.07) | 6.42 (19.50) | 0.051 |
| Oral opioid amount, MME, mean (SD) | 93.94 (153.61) | 87.71 (117.82) | 161.93 (360.53) | 0.743 |
| Discharge opioid, MME, mean (SD) | 123.52 (123.01) | 128.09 (126.78) | 73.64 (48.03) | 0.005 |
| Prescription muscle relaxants on discharge, no. (%) | 108 (41.4) | 97 (40.6) | 11 (50.0) | 0.528 |
| Opioid use on first postoperative follow-up, no. (%) | 19 (7.3) | 18 (7.5) | 1 (4.5) | 0.99 |
| Opioid refill request at first postoperative follow up, no. (%) | 3 (1.1) | 2 (0.8) | 1 (4.5) | 0.605 |
IV intravenous, PCA patient-controlled analgesia, SD standard deviation, TAP transversus abdominis plane, MME morphine milligram equivalent