Table 2.
Distribution of the types of colorectal surgeries.
| First author, year | Type of surgery | TAP block, n | TAP block, % of 317 | Control, n | Control, % of 322 |
|---|---|---|---|---|---|
| Haruethaivijitchock et al. (20) | Right hemicolectomy | 10 | 3.2% | 11 | 3.4% |
| Left hemicolectomy | 7 | 2.2% | 4 | 1.2% | |
| Anterior resection | 5 | 1.6% | 7 | 2.2% | |
| Sigmoid resection | 0 | 0.0% | 2 | 0.6% | |
| Subtotal colectomy | 3 | 0.9% | 12 | 3.7% | |
| Xu et al. (21) | Right hemicolectomy | 23 | 7.3% | 21 | 6.5% |
| Left hemicolectomy | 10 | 3.2% | 8 | 2.5% | |
| Anterior resection | 16 | 5.0% | 20 | 6.2% | |
| Sigmoid resection | 11 | 3.5% | 11 | 3.4% | |
| Damadi et al. (22) | Anterior resection | 4 | 1.3% | 6 | 1.9% |
| Ileocolic/sigmoid resection (non-specified) | 30 | 9.5% | 25 | 7.8% | |
| Abdominal perineal resection | 3 | 0.9% | 0 | 0.0% | |
| Total abdominal colectomy | 2 | 0.6% | 0 | 0.0% | |
| Total proctocolectomy | 0 | 0.0% | 0 | 0.0% | |
| Colostomy reversal | 2 | 0.6% | 0 | 0.0% | |
| Oh et al. (23) | Colon (non-specified) | 11 | 3.5% | 18 | 5.6% |
| Rectum (non-specified) | 17 | 5.4% | 9 | 2.8% | |
| Smith et al. (24) | Right hemicolectomy | 29 | 9.1% | 34 | 10.6% |
| Left hemicolectomy | 3 | 0.9% | 5 | 1.6% | |
| Anterior resection | 33 | 10.4% | 35 | 10.9% | |
| Subtotal colectomy | 4 | 1.3% | 0 | 0.0% | |
| Keller et al. (25) | Resection rectopexy | 1 | 0.3% | 1 | 0.3% |
| Anterior resection | 3 | 0.9% | 8 | 2.5% | |
| Ileocolic/sigmoid resection (non-specified) | 32 | 10.1% | 27 | 8.4% | |
| Abdominal perineal resection | 1 | 0.3% | 1 | 0.3% | |
| Total abdominal colectomy | 3 | 0.9% | 1 | 0.3% | |
| Total proctocolectomy | 1 | 0.3% | 1 | 0.3% | |
| Walter et al. (26) | Right hemicolectomy | 14 | 4.4% | 14 | 4.3% |
| Left and rectal resection (non-specified) | 19 | 6.0% | 21 | 6.5% | |
| Bharti et al. (27) | Not mentioned | 20 | 6.3% | 20 | 6.2% |
| Total | 307 | 100% | 322 | 100% | |
| Types of operations sorted by the number of patients in descending order | Right hemicolectomy | 76 | 24.0% | 80 | 24.9% |
| Ileocolic/sigmoid resection (non-specified) | 62 | 19.6% | 52 | 16.2% | |
| Anterior resection | 61 | 19.2% | 76 | 23.7% | |
| Not mentioned | 20 | 6.3% | 20 | 6.2% | |
| Left hemicolectomy | 20 | 6.3% | 17 | 5.3% | |
| Left and rectal resection (non-specified) | 19 | 6.0% | 21 | 6.5% | |
| Rectum (non-specified) | 17 | 5.4% | 9 | 2.8% | |
| Colon (non-specified) | 11 | 3.5% | 18 | 5.6% | |
| Sigmoid resection | 11 | 3.5% | 13 | 4.0% | |
| Subtotal colectomy | 7 | 2.2% | 12 | 3.7% | |
| Total abdominal colectomy | 5 | 1.6% | 1 | 0.3% | |
| Abdominal perineal resection | 4 | 1.3% | 1 | 0.3% | |
| Colostomy reversal | 2 | 0.6% | 0 | 0.0% | |
| Total proctocolectomy | 1 | 0.3% | 1 | 0.3% | |
| Resection rectopexy | 1 | 0.3% | 1 | 0.3% |
Table 2 shows the distribution of types of colorectal surgery in RCTs in our meta-analysis. Right hemicolectomy, ileocolic/sigmoid resection (non-specified), and anterior resection are the three main types of surgery that were used together in 62.8 and 64.8% of patients in the TAP block and control groups, respectively.