| 摘要 |
Disclosed is an infusion pump device comprising a peristaltic pump means, wherein the tubing (36) comprises first to fourth zones directly joining each other in downstream direction, the first zone being the most upstream zone is provided so that an engagement element (22, 26) comes into engagement with the tubing (36) during movement along the first zone, the second and third zones are provided so that an engagement element (22, 26) remains in engagement with the tubing (36) during movement along the second and third zones, the fourth zone being the most downstream zone is provided so that an engagement element (22, 26) is disengaged from the tubing (36) during movement along the fourth zone, the length of each of the zones is shorter than the distance between the two neighboring engagement elements (22, 26), the sum of the lengths of the second and third zones is equal to the distance between the two neighboring engagement elements (22, 26), and the cross-section of the second zone is larger than the cross-section of the third zone by an amount leading to an increase of volume which is at least equal to an increase of volume displaced in the fourth zone resulting from the disengagement of an engagement element (22, 26) from the tubing (36). |
