| 摘要 |
PROBLEM TO BE SOLVED: To provide a peristaltic movement infusion pump capable of accurately detecting blockage of an infusion line and inclusion of air bubbles in an infusion tube without using plural sensors, in a simple constitution.SOLUTION: The peristaltic movement pump has closure points at plural positions inhibiting flow of liquid in an infusion tube 1. The peristaltic movement pump includes: capacity change means f4, 18 changing capacity of a closure area sandwiched between one closure point and the other closure point in response to a lapse of peristaltic movement for liquid feed; a load sensor 14 detecting pressure in the infusion tube 1 in the closure area; and air bubble detection means discriminating presence/absence of air bubbles included in the infusion tube 1 based on change of a change amount of pressure in the infusion tube 1 detected by the load sensor 14 with capacity change exerted by the capacity change means f4, 18.SELECTED DRAWING: Figure 1 |
