Spring clip safety IV catheter
First Claim
1. A safety IV catheter comprising:
- a) a needle having a needle shaft and a needle tip;
b) said needle shaft comprising a bulge;
c) a hollow tubular catheter having a proximal end;
d) said hollow tubular catheter is secured to the distal end of a catheter hub;
e) said catheter hub having a hub section, wherein a chamber is formed in said hub section, and having an inner wall comprising a groove or bump being formed in said inner wall;
f) a resilient spring clip needle guard located within said chamber being formed in said hub section of said catheter hub and comprising two curved protrusions or curved sections and two distal end walls;
g) said needle being received within said hollow tubular catheter when in a ready position, wherein said needle extends through said chamber, a passageway of said tubular catheter, and distally beyond said catheter hub and said hollow tubular catheter so that said needle tip extends beyond the tapered distal end of said hollow tubular catheter and said needle guard located within said hub chamber is adapted to automatically snap or pivot into a retracted position for blocking access to said distal needle tip and preventing further movement of said needle tip when said needle is in its retracted position;
h) said needle guard being urged outwardly such that said two curved sections or curved protrusions contact with said groove or bump of said inner wall of said catheter hub so that the needle guard is retained therein in the ready position;
i) said needle guard further comprising a proximal wall or proximal vertical arm having an opening adapted to let said shaft of needle freely pass through and axially move; and
j) wherein said bulge on said needle has a diameter greater than that of said opening of said proximal wall or proximal vertical arm so as to engage said opening during proximal movement of said needle.
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Accused Products
Abstract
A safety IV catheter includes a unitary, resilient needle guard received in a catheter hub. The needle guard includes a proximal arm or wall that includes an opening through which a needle passes for axial movement. When the needle is retracted from the catheter, it releases the force that had previously prevented movement of the needle guard within the catheter hub. This in turn causes the needle guard to snap into a position in which it is clamped onto the needle shaft and in which its distal wall blocks access to the needle tip. In this condition, the spring needle guard and needle can be removed from the catheter hub. A slot or crimp may be formed in the needle shaft that engages with the needle guard after the protected needle and needle guard are removed from the catheter hub, thereby to prevent removal of the protected needle from the needle guard.
115 Citations
29 Claims
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1. A safety IV catheter comprising:
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a) a needle having a needle shaft and a needle tip; b) said needle shaft comprising a bulge; c) a hollow tubular catheter having a proximal end; d) said hollow tubular catheter is secured to the distal end of a catheter hub; e) said catheter hub having a hub section, wherein a chamber is formed in said hub section, and having an inner wall comprising a groove or bump being formed in said inner wall; f) a resilient spring clip needle guard located within said chamber being formed in said hub section of said catheter hub and comprising two curved protrusions or curved sections and two distal end walls; g) said needle being received within said hollow tubular catheter when in a ready position, wherein said needle extends through said chamber, a passageway of said tubular catheter, and distally beyond said catheter hub and said hollow tubular catheter so that said needle tip extends beyond the tapered distal end of said hollow tubular catheter and said needle guard located within said hub chamber is adapted to automatically snap or pivot into a retracted position for blocking access to said distal needle tip and preventing further movement of said needle tip when said needle is in its retracted position; h) said needle guard being urged outwardly such that said two curved sections or curved protrusions contact with said groove or bump of said inner wall of said catheter hub so that the needle guard is retained therein in the ready position; i) said needle guard further comprising a proximal wall or proximal vertical arm having an opening adapted to let said shaft of needle freely pass through and axially move; and j) wherein said bulge on said needle has a diameter greater than that of said opening of said proximal wall or proximal vertical arm so as to engage said opening during proximal movement of said needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A safety IV catheter comprising:
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a hollow tubular catheter having a proximal end secured to a distal end of a catheter hub, said catheter hub having a hub section having an inner wall defining a chamber having a groove or a bump being formed on said inner wall; a needle having a needle shaft attached to a needle hub, a needle tip, and a bulge near the needle tip, said needle being received within said hollow tubular catheter in a ready position, wherein said needle extends through said chamber and distally beyond said catheter hub and said hollow tubular catheter so that said needle tip extends beyond a distal end of said hollow tubular catheter; a resilient spring clip needle guard disposed within said chamber and having said needle shaft passing therethrough, said resilient spring clip needle guard comprising an arm with an end wall urged by said needle shaft into contact with said groove or bump of said catheter hub so that the needle guard is retained therein in the ready position;
said resilient spring clip needle guard is adapted to automatically snap or pivot into a retracted position so that said needle tip is guarded from an inadvertent needle stick;wherein said resilient spring clip needle guard is released from said groove or bump when said needle shaft moves and said needle tip is located proximally of said end wall of said arm; wherein said resilient spring clip needle guard further comprises a proximal wall or proximal vertical arm having an opening having the needle shaft freely passing therethrough and wherein said bulge has a diameter greater than that of said opening of said proximal wall or proximal vertical arm to limit movement of said proximal wall or said proximal vertical arm of said resilient spring clip needle guard distally beyond said bulge. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A safety IV catheter comprising:
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a hollow tubular catheter having a proximal end secured to a distal end of a catheter hub, said catheter hub having a hub section having an inner wall defining a chamber having a reduced internal diameter section, which is smaller in internal diameter than a chamber section distally thereof and proximally thereof; a needle having a needle shaft attached to a needle hub, a needle tip, and a bulge proximal of the needle tip, said needle being received within said hollow tubular catheter and said needle tip extending distally beyond a distal end thereof in a ready position; a resilient spring clip needle guard comprising a plurality of arms disposed within said chamber and having said needle shaft passing through a rear wall having a proximally facing wall surface, a distally facing wall surface, and central opening formed through the proximally and distally facing wall surfaces, said plurality of arms, each with a curved protrusion and a distal wall, are urged into retaining contact with said protrusion in said chamber of said catheter hub and pivotable inwardly when moved proximally to clear said protrusion in said chamber; wherein the bulge on the needle has a larger cross-sectional dimension than the opening on the rear wall of the resilient spring clip needle guard to limit movement of the resilient spring clip needle guard distally off of the needle in the retracted position. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A safety IV catheter comprising:
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a catheter hub with a tubular catheter, a needle hub with a needle projecting through the tubular catheter, and a resilient spring clip needle guard with a proximal wall or a proximal vertical arm having a central opening formed through a proximally facing wall surface and a distally facing wall surface located inside a chamber defined by the catheter hub and having the needle projecting through the central opening; wherein said resilient spring clip needle guard comprises an arm comprising a bent section forming a curved protrusion and comprising an end wall at an end thereof biased outwardly such that said curved protrusion engage a groove or a protrusion formed in the chamber of the catheter hub to retain the resilient spring clip needle guard inside the chamber during retraction of the needle in a proximal direction away from the catheter hub, the protrusion defining a reduced internal diameter section, which is smaller in internal diameter than a chamber section distally thereof and proximally thereof and the groove defining an enlarged diameter section, which is larger in internal diameter than a chamber section distally thereof and proximally thereof; wherein a bulge on the needle proximal of a needle tip has a larger cross-sectional dimension than the central opening on the proximal wall or the proximal vertical arm of the resilient spring clip needle guard to limit movement of the resilient spring clip needle guard distally off of the needle. - View Dependent Claims (26, 27, 28, 29)
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Specification