Table 2.
Measurement values for flap perfusion monitoring of not revised flaps
| Tissue depth | Timepoint of measurement | ||||
|---|---|---|---|---|---|
| 0 h | 12 h | 24 h | 36 h | 48 h | |
| RFFF (n = 24) | |||||
| Blood flow (AU) | |||||
| 2 mm | 39.5 (25.0) | 34.5 (41.0) | 32.0 (23.0) | 44.0 (29.0) | 51.5 (45.0) |
| 8 mm | 147.0 (76.0) | 144.5 (79.0) | 133.0 (91.0) | 176.0 (100.0) | 185.5 (89.0) |
| 3 mm | 184.0 (121.0) | 156.0 (113.0) | 171.0 (98.0) | 181.0 (64.0) | 203.5 (74.0) |
| Hemoglobin concentration (AU) | |||||
| 2 mm | 72.0 (24.0) | 66.5 (19.0) | 62.0 (27.0) | 60.5 (15.0) | 59.5 (19.0) |
| 8 mm | 41.5 (16.0) | 42.0 (12.0) | 39.0 (13.0) | 41.0 (10.0) | 41.5 (10.0) |
| 3 mm | 93.0 (7.0) | 90.0 (12.0) | 86.0 (11.0) | 82.5 (11.0) | 85.0 (12.0) |
| Hemoglobin oxygen saturation (%) | |||||
| 2 mm | 80.0 (14.0) | 70.0 (24.0) | 59.0 (19.0) | 63.0 (13.0) | 63.5 (13.0) |
| 8 mm | 82.0 (16.0) | 58.5 (29.0) | 56.0 (34.0) | 70.0 (36.0) | 73.0 (31.0) |
| 3 mm | 84.0 (13.0) | 69.5 (13.0) | 72.0 (23.0) | 68.5 (13.0) | 66.5 (19.0) |
| ALTF (n = 2) | |||||
| Blood flow (AU) | |||||
| 2 mm | 12.5 (–) | 9.5 (–) | 10.5 (–) | 7.5 (–) | 38.5 (–) |
| 8 mm | 104.5 (–) | 87.0 (–) | 77.5 (–) | 115.5 (–) | 222.5 (–) |
| 3 mm | 79.5 (–) | 80.5 (–) | 95.0 (–) | 91.0 (–) | 144.0 (–) |
| Hemoglobin concentration (AU) | |||||
| 2 mm | 60.0 (–) | 42.5 (–) | 47.0 (–) | 44.0 (–) | 57.0 (–) |
| 8 mm | 30.0 (–) | 29.5 (–) | 32.5 (–) | 32.0 (–) | 34.0 (–) |
| 3 mm | 80.5 (–) | 74.0 (–) | 76.0 (–) | 74.5 (–) | 78.0 (–) |
| Hemoglobin oxygen saturation (%) | |||||
| 2 mm | 54.0 (–) | 22.0 (–) | 32.0 (–) | 31.5 (–) | 43.0 (–) |
| 8 mm | 39.0 (–) | 28.5 (–) | 36.5 (–) | 36.5 (–) | 40.5 (–) |
| 3 mm | 66.5 (–) | 50.5 (–) | 39.5 (–) | 39.5 (–) | 70.5 (–) |
Perfusion measurement values are indicated as median (with interquartile range) for each measurement time point (0 h postoperatively, 12 h postoperatively, 24 h postoperatively, 36 h postoperatively, 48 h postoperatively) separately for 2-mm, 8-mm and 3-mm tissue depth and RFFF and ALTF for not revised flaps
AU arbitrary units