Infusion device

Abstract

An infusion device for dispensing fluid at a predetermined flow rate includes an elastic bladder, a pressure regulator, and a flow restrictor. The elastic bladder includes a bladder volume portion anda bladder outlet, and the elastic bladder stores fluid in the bladder volume portion and dispenses fluid through the outlet at a bladder pressure. The pressure regulator is in fluid communication with the outlet of the elastic bladder. The pressure regulator includes a fluid inlet and a fluid outlet. The fluid inlet is coupled to the bladder outlet to receive fluid from the bladder. The flow restrictor is in fluid communication with the fluid outlet. The flow restrictor and the pressure regulator cooperate to discharge fluid from the flow restrictor at a predetermined flow rate.

Description

technical field [0001] The present disclosure generally relates to infusion devices, and more particularly, to a compact mobile flexible sachet infusion pump for administering pharmaceutically active substances. Flexible bladder infusion pumps may include elastomeric bladder infusion pumps and flexible bladder infusion pumps having external means for applying pressure to the bladder (eg, platen pumps, piston pumps, etc.). Background technique [0002] In one embodiment of an ambulatory flexible bladder infusion pump, the elastomeric infusion pump delivers a predetermined volume of solution to a patient at a low fluid flow rate for a preselected period of time. Known elastomeric infusion pumps comprise an elastomeric bladder for solution storage, which is also used as a source of pressure for fluid movement, and a flow restrictor connected in sequence to limit the volume of the solution infused to the patient. flow rate. In some embodiments, the desired solution flow rate i...

AI Technical Summary

Problems solved by technology

Failure to meet release criteria may result in the rejection of the entire batch

[0006] Additionally, if the height of the flexible bladder varies relative to the outlet (typically at the inlet of the patient's catheter), a compact flexible bladder infusion pump will exhibit varying pressures at the outlet of the infusion tubing, resulting in varying flow rate

For example, raising the bladder relative to the outlet results in additional pressure at the outlet, and the flow rate may increase if the restrictor is also close to the outlet

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