Table 3 Resistances to flow for the spinal needles and time constants calculated for P = 12 cmH2O (From data of the reference paper [15])
Needle type | R (cm s/ml) | τ (s) |
|---|---|---|
Sprotte 24G Atraumatic | 2413.41 | 142.9 |
Spinocan 22G Quincke | 1421.05 | 66.7 |
BD 22G Quincke | 1064.04 | 55.6 |
BD 22G Whitacre | 907.56 | 38.5 |
Sprotte 22G Atraumatic | 667.7 | 25 |