Closed system catheter with guide wire
First Claim
1. A closed catheter system for the introduction and placement of a flexible catheter in the lumen of a blood vessel and using the advancement of a wire into said lumen to guide the flexible catheter as said catheter is advanced and positioned in said lumen, said closed catheter system including:
- (a) a hollow needle of a determined length and having a sharpened entering end and an exit end;
(b) a hub axially secured and mounted to said needle and positioned at a selected distance from the sharpened end of said needle, this hub having a skirt portion providing an interior cavity which is open to the rear thereof, this hub having a contoured forward end;
(c) a flexible catheter formed with a through bore and slideable on and along the outer diameter of the needle, said catheter having an entering end sized to be easily inserted with the needle into the lumen of the vessel and with the other end of said flexible catheter attached to a hub adapted to be removably mounted on the contoured forward end of the needle hub;
(d) a centering plug within the needle hub with means for retaining said centering plug within the interior cavity of the needle hub, this centering plug having a through guideway positioned and terminating so the exit end of said guideway is substantially in alignment with the bore of the needle;
(e) a wire positioned and sized so as to be slide fit in the bore of the needle, said wire disposed to be advanced by manipulation to and through said guideway and bore of the needle, and as the wire is advanced and exits the sharpened entering end of the needle, this wire is caused to follow the lumen path of the blood vessel, and(f) a lay-flat tube enclosure providing an envelope having a distal end sealed to at least partially encapsulate and restrain this distal end of the wire, this enclosure attached at its other end to the guide assembly and providing therewith a sealed enclosure of the wire.
1 Assignment
0 Petitions
Accused Products
Abstract
A catheter system is provided for the introduction and placement of a flexible catheter into the lumen of an artery or vein. A guide wire is provided and is kept in a sterile condition within a flexible bag-like enclosure attached to the hub of a needle. The needle is hollow and is sharpened in the usual manner and is secured in a hub to provide a needle assembly. This hub is provided with a skirt and extends through this hub and into flow communication with a "flashback" chamber. In one embodiment, the needle is connected to a tubular member having a transverse hole near its interior end, and in another embodiment the needle'"'"'s inner end is in flow communication with a channel or annular groove in a centering plug. In every embodiment, there is a centering plug which provides a guideway for the guide wire which is positioned in this guideway to prevent fluid flow. The guide wire is manipulated forwardly by grasping the wire through the bag-like enclosure and advanced forwardly by "feel" and into the lumen after penetration has been made as indicated by the "flashback." The catheter is separated from the needle hub and advanced along the guide wire until placement is achieved, after which the needle, guide wire and bag are withdrawn from the patient and discarded.
152 Citations
27 Claims
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1. A closed catheter system for the introduction and placement of a flexible catheter in the lumen of a blood vessel and using the advancement of a wire into said lumen to guide the flexible catheter as said catheter is advanced and positioned in said lumen, said closed catheter system including:
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(a) a hollow needle of a determined length and having a sharpened entering end and an exit end; (b) a hub axially secured and mounted to said needle and positioned at a selected distance from the sharpened end of said needle, this hub having a skirt portion providing an interior cavity which is open to the rear thereof, this hub having a contoured forward end; (c) a flexible catheter formed with a through bore and slideable on and along the outer diameter of the needle, said catheter having an entering end sized to be easily inserted with the needle into the lumen of the vessel and with the other end of said flexible catheter attached to a hub adapted to be removably mounted on the contoured forward end of the needle hub; (d) a centering plug within the needle hub with means for retaining said centering plug within the interior cavity of the needle hub, this centering plug having a through guideway positioned and terminating so the exit end of said guideway is substantially in alignment with the bore of the needle; (e) a wire positioned and sized so as to be slide fit in the bore of the needle, said wire disposed to be advanced by manipulation to and through said guideway and bore of the needle, and as the wire is advanced and exits the sharpened entering end of the needle, this wire is caused to follow the lumen path of the blood vessel, and (f) a lay-flat tube enclosure providing an envelope having a distal end sealed to at least partially encapsulate and restrain this distal end of the wire, this enclosure attached at its other end to the guide assembly and providing therewith a sealed enclosure of the wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for constructing a closed catheter system adapted for placing a flexible catheter into the lumen of vessel and using the advancement of a guide wire into said lumen to guide the flexible catheter as it is advanced and positioned in said lumen, said construction method including the steps of:
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(a) supplying a hollow needle of a determined length and having a sharpened entering and an exit end; (b) securing axially a needle hub to said needle and positioning said hub at a selected distance from the sharpened end, and forming said hub with a forward contoured end and having a skirt portion providing an interior cavity which is open to the rear thereof; (c) providing a flashback indicating means at or near the exit end of the needle and in flow communication with said needle so as to indicate an initial penetration of a wall of said blood vessel; (d) forming a flexible catheter with a through bore and slideable on and along the outer diameter of the needle, said catheter having an entering end sized to be easily inserted with the sharpened end of the needle into the lumen of the vessel, and fixedly securing the other end of the flexible catheter in a hub member which is formed so as to be mounted on the contoured forward end of the needle hub; (e) providing, forming and positioning a centering plug so that its forward end is retained within the skirt portion of the needle hub and forming in said centering plug a through guideway and positioning and terminating said guideway so that said guideway is substantially in alignment with the bore of the needle and proximate to the exit end of said needle; (f) providing a guide wire of a selected length and having a blunted entering end sized to be a slide fit in the bore of the needle and advancing this wire by manipulation to and through the bore of the needle, and as this wire is advanced it exits the sharpened end of the needle and, with further advancement, the practitioner causes the advancing wire to follow the lumen path of the blood vessel, and (g) providing and securing to the open rear end of the needle hub a flexible enclosure from lay-flat tubing, this tubing of a determined length and at least partially encapsulating the guide wire and restraining the distal end of said guide wire at or near the unsecured end of the tubing and sealing this unsecured end of the tubing. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A closed catheter system and device for the introduction and placement of a flexible catheter in the lumen of a blood vessel and using the advancement of an enclosed wire into said lumen to guide the flexible catheter as said catheter is advanced and positioned in said lumen, this device retaining the "feel" properties of an Intravenous Catheter without attached guide wire during initial penetration, said closed catheter system including
(a) a conventional Intravenous Catheter (I.V.) characterized as having: -
(a-1) a hollow needle of a determined length and having a sharpened entering end and an exit end; (a-2) a hub axially secured and mounted to said needle and positioned at a selected distance from the sharpened end of said needle, this hub having a skirt portion providing an interior cavity which is open to the rear thereof, this hub having a contoured forward end; (a-3) a flexible catheter formed with a through bore and slideable on and along the outer diameter of the needle, said catheter having an entering end sized to be easily inserted with the needle into the lumen of the vessel and with the other end of said flexible catheter attached to a hub adapted to be removably mounted on the contoured forward end of the needle hub; (b) a centering plug contiguous to the needle hub with means for retaining said centering plug within the interior cavity of the needle hub, this centering plug having a through guideway positioned and terminating so the exit end of said guideway is substantially in alignment with the bore of the needle; (c) a flexible wire positioned and sized so as to be a slide fit in the guideway of the centering plug and bore of the needle of the conventional Intravenous Catheter, said wire disposed to be advanced by manipulation to and through said guideway in the centering plug and the bore of the needle and, as the wire is advanced, a blunt (non-sharp) entering end exits the sharpened end of the needle, this advancing wire caused to follow the path of the lumen of the blood vessel, and (d) a flexible enclosure from lay-flat tubing and having one end attached to the open rear end of the needle hub, this tubing at least partially encapsulating the guide wire, to achieve a closed system, said flexible enclosure and enclosed wire maintaining a balanced catheter when center of gravity is within the confines of the conventional Intravenous Catheter to be able to "feel" the wire as it is advanced.
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Specification