Table 2 Skin necrosis outcome at first occurrence and at 30–40-day follow-up
Necrosis outcome | N control/N heated | Control | Heated |
|---|---|---|---|
Post-operative skin necrosis (n, %) | 66*/68** | ||
No | 43 (65%) | 50 (74%) | |
Yes | 23 (35%) | 18 (26%) | |
Depth of necrosis at first occurrence (n, %) | 62/64 | ||
A—none | 44 (71%) | 50 (78%) | |
B—colour change | 11 (18%) | 9 (14%) | |
C—partial thickness | 7 (11%) | 4 (6%) | |
D—full thickness | 0 (0%) | 1 (2%) | |
Area of necrosis at first occurrence | |||
Total area if necrosis present (mm2) | 18/14 | ||
Median (IQR) | 850.0 (100.0, 2700.0) | 700.0 (400.0, 1300.0) | |
By SKIN score | |||
Area of colour change (mm2) | 11/9 | ||
Median (IQR) | 300.0 (50.0, 1020.0) | 700.0 (600.0, 1300.0) | |
Area of partial thickness (mm2) | 7/4 | ||
Median (IQR) | 1500.0 (250.0, 3300.0) | 730.0 (355.0, 2050.0) | |
Area of full thickness (mm2) | 0/1 | ||
Median (IQR) | – | – | |
Total area for all patients (including area = 0 mm2 for none) | 61/64 | ||
Median (IQR) | 0.0 (0.0, 50.0) | 0.0 (0.0, 0.0) | |
Maximum depth of necrosis over 30–40-day follow-up (n, %) | 62/64 | ||
A—none | 44 (71%) | 50 (78%) | |
B—colour change | 10 (16%) | 9 (14%) | |
C—partial thickness | 6 (10%) | 3 (5%) | |
D—full thickness | 2 (3%) | 2 (3%) | |
Maximum area of necrosis over 30–40 day follow-up | |||
Total area if necrosis present (mm2) | 18/14 | ||
Median (IQR) | 850.0 (100.0, 2700.0) | 700.0 (400.0, 1300.0) | |
By SKIN score | |||
Area of colour change (mm2) | 11/9 | ||
Median (IQR) | 485.0 (50.0, 1020.0) | 700.0 (600.0, 1300.0) | |
Area of partial thickness (mm2) | 7/4 | ||
Median (IQR) | 1800.0 (250.0, 3300.0) | 1000.0 (250.0, 3100.0) | |
Area of full thickness (mm2) | 0/1 | ||
Median (IQR) | (−) | (−) | |
Total area for all patients (including area = 0 mm2 for none) | 61/64 | ||
Median (IQR) | 0.0 (0.0, 50.0) | 0.0 (0.0, 0.0) | |
Necrosis resolved/fully healed within 30–40-day follow-up (n, %) | 17/13 | ||
No | 8 (47%) | 7 (54%) | |
Yes | 9 (53%) | 6 (46%) | |