Time (min) | Leakage | Shape | Flow (ml/min) | Self-estimation | |
---|---|---|---|---|---|
5 Points | < 8 | None | Cobra head | > 200 | Easy |
4 Points | 8–12 | Oozing | 151–200 | Relatively easy | |
3 Points | 12–16 | 1 Point leakage | Stenosis | 101–150 | Moderate |
2 Points | 16–20 | 2 Points leakage | 51–100 | Relatively difficult | |
1 Point | 20 < | Dehiscence | Occlusion | < 50 | Difficult |
− 1 Point | Issues with the shunt tube | ||||
− 2 Points | Issues with the needle or thread |