Inflation/deflation syringe with threaded plunger
First Claim
1. A device for inflating the balloon of a balloon catheter comprising:
- a longitudinally-extending housing defining a fluid-receiving reservoir and having a proximal and a distal end,means for connecting the housing to the catheter so that the reservoir is in fluid communication with the balloon of the catheter;
a piston movable within the reservoir to eject fluid from the reservoir into the catheter;
a plunger attached to the proximal end of the piston, the plunger having a threaded portion;
threaded means for engaging the threaded portion of the plunger, said means moveable between an engaged and a disengaged position;
an arm having a proximal and distal end and extending longitudinally with respect to the housing, said arm rotatably attached to the housing at its distal end and attached to the threaded means at the proximal end, so that movement of the proximal end of the arm moves the threaded means between an engaged and a disengaged position; and
a biasing means for biasing the threaded means into engaged position.
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Accused Products
Abstract
An inflation device is disclosed for inflation of a balloon of a balloon catheter. A housing defines a fluid-receiving reservoir in fluid communication with the balloon and an interior space for completely receiving a pressure gauge which accesses the fluid for measurement of the pressure within the system.
The reservoir has a piston and threaded plunger extending from a proximal opening in the reservoir. The threaded plunger is selectively engaged by a biased rotatable arm on the housing. The piston and plunger are part of a syringe received within the reservoir, and the housing defines an aperture for visual readout of the level of liquid in the reservoir.
The pressure gauge contains a Bourdon tube and further contains a gauge fluid in communication with the tube. The means for isolating the inflation fluid from the gauge is an expandable bladder disposed in the neck between the gauge and the inflation fluid so that the bladder expands upon increased fluid pressure within the closed system to create a pressure readout.
The housing defines an aperture for visual readout of a timer in the form of an LCD display with a frontally-illuminated screen. The timer has a manual activation lever and the housing includes an aperture allowing manual activation of the lever.
128 Citations
9 Claims
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1. A device for inflating the balloon of a balloon catheter comprising:
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a longitudinally-extending housing defining a fluid-receiving reservoir and having a proximal and a distal end, means for connecting the housing to the catheter so that the reservoir is in fluid communication with the balloon of the catheter; a piston movable within the reservoir to eject fluid from the reservoir into the catheter; a plunger attached to the proximal end of the piston, the plunger having a threaded portion; threaded means for engaging the threaded portion of the plunger, said means moveable between an engaged and a disengaged position; an arm having a proximal and distal end and extending longitudinally with respect to the housing, said arm rotatably attached to the housing at its distal end and attached to the threaded means at the proximal end, so that movement of the proximal end of the arm moves the threaded means between an engaged and a disengaged position; and a biasing means for biasing the threaded means into engaged position. - View Dependent Claims (2, 3, 4, 5)
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6. A device for inflating the balloon of a balloon catheter comprising:
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a housing defining a fluid-receiving reservoir; means for connecting the housing to the catheter so that the reservoir is in fluid communication with the balloon of the catheter; a piston movable within the reservoir to eject fluid from the reservoir into the catheter; a plunger attached to the proximal end of the piston, the plunger defining buttress threads; threaded means for engaging the plunger, said means having buttress threads complementary to the buttress threads of the plunger and movable between an engaged and a disengaged position; means for moving the threaded means between an engaged and a disengaged position; wherein the means for moving the threaded portion is an arm rotatably attached to the housing at its distal end, the arm attached to the threaded means at its proximal end and adapted for transverse movement with respect to the plunger so that movement of the arm engages or disengages the threaded means; and a biasing means for biasing the arm into engaged position. - View Dependent Claims (9)
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- 7. A device according to claim 7 and wherein the housing contains a pressure gauge for measuring the fluid pressure in the catheter.
Specification