US 12,011,567 B2
Flex-stroke infusion pump
Boaz Eitan, Hofit (IL); Ram Shtoltz, Tel-Aviv (IL); Amir Rasowsky, Yakir (IL); Gidi Pesach, Kfar Vitkin (IL); and Nir Ovadia, Netanya (IL)
Assigned to EITAN MEDICAL LTD., Netanya (IL)
Appl. No. 16/967,952
Filed by EITAN MEDICAL LTD., Netanya (IL)
PCT Filed Apr. 9, 2018, PCT No. PCT/IL2018/050409
§ 371(c)(1), (2) Date Aug. 6, 2020,
PCT Pub. No. WO2019/155453, PCT Pub. Date Aug. 15, 2019.
Claims priority of provisional application 62/629,038, filed on Feb. 11, 2018.
Prior Publication US 2021/0001036 A1, Jan. 7, 2021
Int. Cl. A61M 5/145 (2006.01); A61M 5/142 (2006.01); A61M 5/168 (2006.01)
CPC A61M 5/1452 (2013.01) [A61M 5/16881 (2013.01); A61M 2005/14208 (2013.01); A61M 2205/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An infusion pump comprising:
a plunger;
a proximal valve located proximally to said plunger;
a distal valve located distally to said plunger; and
a controller configured to control an infusion fluid delivery to a subject and an infusion fluid intake from a reservoir,
wherein controlling the infusion fluid intake comprises:
closing said distal valve,
opening said proximal valve,
moving said plunger to an upper squeezing position, in which said plunger is configured to partially squeeze an infusion tube disposed within the infusion pump to facilitate intake of fluid into the infusion tube; and
providing a wait period, following the infusion fluid intake, during which said plunger remains at said upper squeezing position, thereby providing time for recovery of the infusion tube such that the infusion tube engages with the plunger;
wherein controlling the infusion fluid delivery comprises:
closing said proximal valve and opening said distal valve, while said plunger is at the upper squeezing position, and
lowering said plunger from the upper squeezing position to a lower squeezing position,
wherein at both the upper squeezing position and the lower squeezing position, said plunger is configured to squeeze a section of the infusion tube, such that opposite sides of an inner surface of said section do not contact one another, and
wherein the controller is configured to set a duration of the wait period as a function of a maximum no-flow time between the infusion fluid intake and the infusion fluid delivery.