Table 1 Resistance to flow measurements
Type of needle | Measurement (M) | Total number of drops | Total weight of drops (mg) | Measurement time (s) | Flow rate (cmH2O) | R (cm.s/ml) | AVG + SD |
|---|---|---|---|---|---|---|---|
22G Pajunk Sprotte | M1 | 10 | 573.60 | 25.5 | 0.0225 | 667.5 | 667.9 ± 0.91 |
M2 | 10 | 574.20 | 25.6 | 0.0224 | 668.6 | ||
M3 | 10 | 590.80 | 26.3 | 0.0225 | 667.7 | ||
22G Braun Spinocan | M1 | 10 | 549.60 | 51.8 | 0.0106 | 1415.0 | 1411.3 ± 3.49 |
M2 | 10 | 539.50 | 50.7 | 0.0106 | 1410.8 | ||
M3 | 10 | 554.50 | 52.1 | 0.0107 | 1408.0 | ||
22G M. Schilling | M1 | 9 | 480.80 | 32.6 | 0.0147 | 1017.1 | 1028.7 ± 11.3 |
M2 | 9 | 508.60 | 34.9 | 0.0146 | 1029.3 | ||
M3 | 9 | 507.80 | 35.2 | 0.0144 | 1039.8 |