Table 2.
Comparison of source of RPDA to the thumb with other studies
| No. | Source of RPDA | Studies, sample size | ||
|---|---|---|---|---|
| Earley [7], n=20 | Ikeda et al. [12], n=220 | Present study, n=55 | ||
| 1 | FPMA | 18 (90.0) | 167 (75.9) | 45 (81.8) |
| 2 | UA | 0 | - | 5 (9.1) |
| 3 | SPA | 0 | 41 (18.6) | 7 (12.7) |
| 4 | SPBRA | 2 (10.0) | - | 5 (9.1) |
| 5 | FDMA | 0 | 10 (4.5) | 0 |
| 6 | MA | 0 | - | 1 (1.8) |
| 7 | Absent | 0 | 2 (0.9) | 2 (3.6) |
| Total RPDA | 20 | 220 | 65 | |
Values are presented as number (%). More than one RPDA was observed in 35 hands where in addition to RPDA from the FPMA significant RPDA to the thumb came from one of the other superficial palmar arterial system. RPDA, radial palmar digital artery; FPMA, first palmar metacarpal artery; UA, ulnar artery; SPA, superficial palmar arch; SPBRA, superficial palmar branch of radial artery; FDMA, first dorsal metacarpal artery; MA, median artery.