Fig. 4

Influence of dispensing rate on time extension ratio for peristaltic finger smart pumps. The polyvinyl chloride (PVC) and polybutadiene (PB) infusion sets are stretched to 3 cm and attached to the infusion pumps; dispensing rates are set at 50–200 mL/h. The times required to completely dispense the solution, for all combinations of infusion sets and pumps, were not significantly longer than the input times (N.S., not significant; analysis of variance; mean ± SD, n = 5). The comparison of PVC to PB infusion sets was performed using a paired t-test (*P < 0.01). The results of the Tukey-Kramer multiple comparisons are shown in Table 3