Hydraulically actuated pump for long duration medicament administration

摘要

Presently disclosed is a hydraulic pump device and its use thereof, especially in a fluid delivery system. In one embodiment, the fluid delivery system is an inexpensive, single-use device for slow dosing medicament applications. The fluid delivery system may employ a spring-compressed bellows crank or other combination of simple mechanisms operating according to the well-known peristaltic principle to force a volume of ultrapure bio-inert hydraulic fluid through an aperture, thereby expanding one chamber of a two chamber hydraulic cylinder. The second, fluid storage chamber, containing the medicament, is emptied through a conventional orifice in response to the expansion of the pump chamber. The medicament may then flow through any suitable infusion set into a patient removeably attached thereto.

主权项

1. A fluid delivery device comprising:
a hydraulic housing having a piston configured to sealingly slide along an inner wall of the hydraulic housing and separate the hydraulic housing into a hydraulic pump chamber and a fluid reservoir, the hydraulic pump chamber having a viscous hydraulic fluid and configured to urge the piston along the inner wall to deliver a fluid in the fluid reservoir to a patient, a viscosity of the hydraulic fluid being at least about ISO VG 1000 or more; a first actuator; a first hydraulic reservoir chamber having the hydraulic fluid and coupled between the first actuator and the hydraulic pump chamber, the first actuator being configured to urge the hydraulic fluid in the first hydraulic reservoir chamber into the hydraulic pump chamber; a flow restrictor fluidly coupling the first hydraulic reservoir chamber and the hydraulic pump chamber; a second hydraulic reservoir chamber having the hydraulic fluid and fluidly coupled with the hydraulic pump chamber; and a second actuator configured to urge the hydraulic fluid from the second hydraulic reservoir chamber into the hydraulic pump chamber, independent of the first actuator.