Constant pressure variable flow pump

Details Constant pressure variable flow pump Constant pressure variable flow pump

A - Human Necessities

61

M

128/93

A61M 5/14 (2006.01) A61M 5/142 (2006.01) F16L 55/027 (2006.01) G05D 7/01 (2006.01) A61M 5/168 (2006.01)

Patent

CA 1308324

PC 7359 ABSTRACT A variable flow constant pressure implantable pump employs an in-line needle restrictor (12) having a variable insertion distance in a capillary (10). The degree of insertion determines the effective restriction within the capillary. The restrictor may be repositioned following implantation to vary the drug delivery rate by changing the effective restriction in the capillary. Various couplings may be used such that an auxiliary or bolus port (92) delivers infusate directly into the outlet catheter (24) so that medication from the main chamber (22) does not pass through the auxiliary chamber. A combination of double lumen catheters (106) and T-connectors (100) are employed to provide parallel infusion paths.

596420

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