Single plunger inflation device for angioplasty catheter

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

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604 97, 604108, 604100, 128344, A61M 2900

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047239387

ABSTRACT:
An inflation/deflation device for an angioplasty balloon catheter which permits quick inflation to an approximate working pressure followed by a fine but slower adjustment to a final desired pressure. The device includes a housing containing a syringe of the type having a cylindrical chamber containing a piston. A specially designed plunger extends from the proximal end of the housing whereby the initial approxiate pressure can be achieved by the hand-squeezing of the plunger and a slight rotation of that plunger is used to maintain the plunger in a locked disposition. An internal shaft is disposed within the tubular plunger and its distal end is secured to the syringe's piston. The internal shaft includes a threaded segment on its exterior surface engaging a correspondingly threaded surface on the interior of the plunger such that rotation of the shaft relative to the plunger causes axial movement of the piston within the syringe.

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patent: 4439185 (1984-03-01), Lundquist
patent: 4439186 (1984-03-01), Kuhl
patent: 4583974 (1986-04-01), Kokernak
patent: 4655749 (1987-04-01), Fischione

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