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Cases with different compression degrees and the depth of blood vessels after compression.
| Case number | Compression degree (%) | Depth of PTSJ (mm) |
| Control | 0 | 15 |
| 1 | 10 | 13.5 |
| 2 | 20 | 12 |
| 3 | 30 | 10.5 |
| 4 | 40 | 9 |
| 5 | 50 | 7.5 |
| 6 | 60 | 6 |
| 7 | 70 | 4.5 |
| 8 | 80 | 3 |
| 9 | 90 | 1.5 |
PTSJ, prominent transverse-sigmoid sinus junction.
