Bi-directional flow catheter with retractable trocar/valve structure
First Claim
1. A bi-directional flow catheter comprisingan elongate primary tube having open rearward and forward ends, a side opening in one side thereof, and duct means located rearwardly of said side opening for enabling communication with the interior of the primary tube, anda trocar/valve member disposed in and slidable longitudinally within said primary tube between an insert position and a flow position, said member comprisingan elongate body, one end of which is tapered, said tapered end protruding from the open forward end of the primary tube when the trocar/valve member is in the insert position to facilitate puncture of tissue into which the catheter is inserted,occluding means for preventing communication between the open forward end of the primary tube and said side opening,first passage defining means for enabling communication between said side opening and said duct means when the trocar/valve member is in the flow position, andsecond passage defining means for enabling communication between the open forward end of the primary tube and a point located at the rearward end of said primary tube.
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Accused Products
Abstract
A bi-directional flow catheter for insertion into the body of a patient for the simultaneous introduction into and withdrawal therefrom of fluid. The catheter includes a primary tube having open distal and proximal ends, and a pair of branching tubes, each of which branch from a different side of the primary tube. The primary tube also has an opening in one side thereof to allow introduction of fluid. An elongate trocar/valve member is disposed in the primary tube and is movable longitudinally therein between an insert position and a flow position. One end of the trocar/valve member tapers to a cutting edge which protrudes from the opening in the distal end of the primary tube when the member is in the insert position. The trocar/valve member is formed to prevent communication between the side opening and the opening in the distal end of the primary tube, and to cover the passageways between the primary tube and respective ones of the branching tubes when the member is in the insert position. When the member is in the flow position, the cutting end thereof is withdrawn from the distal opening and communication is allowed between the side opening and one of the branching tubes and between the distal opening and the other of the branching tubes to thereby allow simultaneous introduction of fluid into and withdrawal of fluid from the body of a patient.
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Citations
11 Claims
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1. A bi-directional flow catheter comprising
an elongate primary tube having open rearward and forward ends, a side opening in one side thereof, and duct means located rearwardly of said side opening for enabling communication with the interior of the primary tube, and a trocar/valve member disposed in and slidable longitudinally within said primary tube between an insert position and a flow position, said member comprising an elongate body, one end of which is tapered, said tapered end protruding from the open forward end of the primary tube when the trocar/valve member is in the insert position to facilitate puncture of tissue into which the catheter is inserted, occluding means for preventing communication between the open forward end of the primary tube and said side opening, first passage defining means for enabling communication between said side opening and said duct means when the trocar/valve member is in the flow position, and second passage defining means for enabling communication between the open forward end of the primary tube and a point located at the rearward end of said primary tube.
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6. A bi-directional flow catheter comprising
(a) an elongate primary tube having open distal and proximal ends and an opening in one side thereof, (b) a first tube branching from said one side of the primary tube at a location between said side opening and the proximal end of the primary tube to enable communication with the interior of the primary tube, (c) a second tube branching from the other side of said primary tube to communicate with the interior thereof, and (d) a trocar/valve member disposed in and slidable longitudinally within said primary tube between an insert position and a flow position, said trocar/valve member having an elongate body with a tapered tip at one end thereof, a first enlarged portion formed on one side of the body for preventing communication between the open distal end of the primary tube and said opening, a second enlarged portion formed on said one side of the body and spaced from the first enlarged portion to form a valley therebetween, and a third enlarged portion formed on the other side of the body, (e) said trocar/valve member being positioned, when in the insert position, so that the tapered end of the member protrudes through the open distal end of said primary tube, the second enlarged portion is positioned adjacent said first branching tube to prevent communication between said side opening and the first branching tube, and the third enlarged portion is positioned adjacent said second branching tube to prevent communication between the open distal end of the primary tube and the second branching tube, and (f) said trocar/valve member being positioned, when in the flow position, so that the tapered end of the member is retracted from the distal opening in the primary tube, the valley in said body extends between said side opening and the first branching tube to enable communication therebetween, and the third enlarged portion is withdrawn away from said second branching tube to enable communication between the distal opening of the primary tube and the second branching tube.
Specification