Needle guard
First Claim
Patent Images
1. An IV catheter assembly comprising:
- a catheter hub comprising a hollow body having a proximal end and a distal end, the hollow body defining an interior space;
a catheter having a proximal end and a distal end, the proximal end of the catheter coupled to the proximal end of the catheter hub;
a needle having a needle shaft and a distal tip, the needle moveable between a ready position and a retracted position, in the ready position the distal tip of the needle extending distally from the distal end of the catheter, in the retracted position the distal tip of the needle residing in a position proximal to the proximal end of the catheter, the needle shaft having a change in profile; and
a needle guard comprising first and second arms that extend distally from a base having an aperture formed therein, the needle guard slideably mounted on the needle shaft with the needle shaft passing through the aperture formed in the base, the aperture sized so that a portion of the base circumscribing the aperture engages with the change in profile of the needle shaft to limit a proximal movement of the needle with respect to the needle guard, each of the first and second arms comprising a resilient material and having a proximal section, a mid-section and a distal section, the first and second arms extending from different positions of the base and intersecting one another along their mid-sections so that the distal sections of the first and second arms reside and are urged against opposite sides of the needle shaft when the needle is in the ready position, the needle guard further comprising an elongate member having a through passage extending between a proximal end and a distal end of the elongate member, the elongate member extending distally from a position at or near the base and slideable alongside the needle shaft as the needle is moved between the ready position and the retracted position, the elongate member having a length such that substantially coincident with the change in profile engaging the portion of the base circumscribing the aperture in the base the entirety of the distal tip of the needle is positioned to reside within the through passage of the elongate member and the distal section of at least one of the first and second arms disengages with the needle shaft and moves radially inward to completely cover the distal end of the elongate member, the elongate member being sufficiently rigid to restrict longitudinal movement of the needle with respect to the needle guard when the distal section of at least one of the first and second arms completely covers the distal end of the elongate member.
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Accused Products
Abstract
A needle guard assembly having a resilient arm extending from a base situated to slide along the shaft of a needle. In one implementation the needle guard has an elongate containment member that rides with the resilient arm and is co-operable with the resilient arm to effectuate a covering of the entire distal tip of the needle upon the needle being refracted into the needle guard.
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Citations
58 Claims
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1. An IV catheter assembly comprising:
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a catheter hub comprising a hollow body having a proximal end and a distal end, the hollow body defining an interior space; a catheter having a proximal end and a distal end, the proximal end of the catheter coupled to the proximal end of the catheter hub; a needle having a needle shaft and a distal tip, the needle moveable between a ready position and a retracted position, in the ready position the distal tip of the needle extending distally from the distal end of the catheter, in the retracted position the distal tip of the needle residing in a position proximal to the proximal end of the catheter, the needle shaft having a change in profile; and a needle guard comprising first and second arms that extend distally from a base having an aperture formed therein, the needle guard slideably mounted on the needle shaft with the needle shaft passing through the aperture formed in the base, the aperture sized so that a portion of the base circumscribing the aperture engages with the change in profile of the needle shaft to limit a proximal movement of the needle with respect to the needle guard, each of the first and second arms comprising a resilient material and having a proximal section, a mid-section and a distal section, the first and second arms extending from different positions of the base and intersecting one another along their mid-sections so that the distal sections of the first and second arms reside and are urged against opposite sides of the needle shaft when the needle is in the ready position, the needle guard further comprising an elongate member having a through passage extending between a proximal end and a distal end of the elongate member, the elongate member extending distally from a position at or near the base and slideable alongside the needle shaft as the needle is moved between the ready position and the retracted position, the elongate member having a length such that substantially coincident with the change in profile engaging the portion of the base circumscribing the aperture in the base the entirety of the distal tip of the needle is positioned to reside within the through passage of the elongate member and the distal section of at least one of the first and second arms disengages with the needle shaft and moves radially inward to completely cover the distal end of the elongate member, the elongate member being sufficiently rigid to restrict longitudinal movement of the needle with respect to the needle guard when the distal section of at least one of the first and second arms completely covers the distal end of the elongate member. - 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. An IV catheter assembly comprising:
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a catheter hub comprising a hollow body having a proximal end and a distal end, the hollow body defining an interior space; a catheter having a proximal end and a distal end, the proximal end of the catheter coupled to the proximal end of the catheter hub; a needle having a needle shaft and a distal tip, the needle moveable between a ready position and a retracted position, in the ready position the distal tip of the needle extending distally from the distal end of the catheter, in the retracted position the distal tip of the needle residing in a position proximal to the proximal end of the catheter, the needle shaft having a change in profile; and a needle guard comprising an arm that extends distally from a base having an aperture formed therein, the needle guard slideably mounted on the needle shaft with the needle shaft passing through the aperture formed in the base, the aperture sized so that a portion of the base circumscribing the aperture engages with the change in profile of the needle shaft to limit a proximal movement of the needle with respect to the needle guard, the arm comprising a resilient material and having a proximal section, a midsection and a distal section, the distal section of the arm resides and is urged against a side of the needle shaft when the needle is in the ready position, the needle guard further comprising an elongate member having a through passage extending between a proximal end and a distal end of the elongate member, the elongate member extending distally from a position at or near the base and slideable alongside the needle shaft as the needle is moved between the ready position and the retracted position, the elongate member having a length such that substantially coincident with the change in profile engaging the portion of the base circumscribing the aperture in the base the entirety of the distal tip of the needle is positioned to reside within the through passage of the elongate member and the distal section of the arm disengage with the needle shaft to move radially inward to completely cover the distal end of the elongate member, the elongate member being sufficiently rigid to restrict longitudinal movement of the needle with respect to the needle guard when the distal section of the arm completely covers the distal end of the elongate member. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. An IV catheter assembly comprising:
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a catheter hub comprising a hollow body having a proximal end and a distal end, the hollow body defining an interior space; a catheter having a proximal end and a distal end, the proximal end of the catheter coupled to the proximal end of the catheter hub; a needle having a needle shaft and a distal tip, the needle moveable between a ready position and a retracted position, in the ready position the distal tip of the needle extending distally from the distal end of the catheter, in the retracted position the distal tip of the needle residing in a position proximal to the proximal end of the catheter, the needle shaft having a change in profile; and a needle guard comprising first and second arms that extend distally from a base having an aperture formed therein, the needle guard slideably mounted on the needle shaft with the needle shaft passing through the aperture formed in the base, the aperture sized so that a portion of the base circumscribing the aperture engages with the change in profile of the needle shaft to limit a proximal movement of the needle with respect to the needle guard, each of the first and second arms comprising a resilient material and having a proximal section, a mid-section and a distal section, the first and second arms extending from different positions of the base and intersecting one another along their mid-sections so that the distal sections of the first and second arms reside and are urged against opposite sides of the needle shaft when the needle is in the ready position, the needle guard further comprising an elongate member having a through passage extending between a proximal end and a distal end of the elongate member, the elongate member extending distally from a position at or near the base and slideable alongside the needle shaft as the needle is moved between the ready position and the retracted position, the elongate member having a length such that substantially coincident with the change in profile engaging the portion of the base circumscribing the aperture in the base the entirety of the distal tip of the needle is positioned to reside within the through passage of the elongate member and the distal section of at least one of the first and second arms disengages with the needle shaft and moves radially inward to cover the distal end of the elongate member, the elongate member being sufficiently rigid to restrict longitudinal movement of the needle with respect to the needle guard when the distal section of at least one of the first and second arms covers the distal end of the elongate member, wherein the distal section of the first arm comprises a first wall segment having a distal end, the first wall segment and mid-section of the first arm disposed at different angular orientations with respect to the needle, the first wall segment angled inwardly toward the needle, the distal section of the second arm comprises a second wall segment having a distal end, the second wall segment and mid-section of the second arm disposed at different angular orientations with respect to the needle, the second wall segment angled inwardly toward the needle, the distal ends of the first and second wall segments urged against opposite sides of the needle shaft when the needle is in the ready position, the distal end of the first wall segment configured to disengage with the needle substantially coincident with the change in profile engaging the portion of the base circumscribing the aperture in the base so that the first wall segment fully covers the distal end of the elongate member, the distal end of the second wall segment configured to disengage with the needle substantially coincident with the change in profile engaging the portion of the base circumscribing the aperture in the base to be positioned distal to and overlapping with the first wall segment. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. An IV catheter assembly comprising:
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a catheter hub comprising a hollow body having a proximal end and a distal end, the hollow body defining an interior space; a catheter having a proximal end and a distal end, the proximal end of the catheter coupled to the proximal end of the catheter hub; a needle having a needle shaft and a distal tip, the needle moveable between a ready position and a retracted position, in the ready position the distal tip of the needle extending distally from the distal end of the catheter, in the retracted position the distal tip of the needle residing in a position proximal to the proximal end of the catheter, the needle shaft having a change in profile; and a needle guard comprising an arm that extends distally from a base having an aperture formed therein, the needle guard slideably mounted on the needle shaft with the needle shaft passing through the aperture formed in the base, the aperture sized so that a portion of the base circumscribing the aperture engages with the change in profile of the needle shaft to limit a proximal movement of the needle with respect to the needle guard, the arm comprising a resilient material and having a proximal section, a midsection and a distal section, the distal section of the arm resides and is urged against a side of the needle shaft when the needle is in the ready position, the needle guard further comprising an elongate member having a through passage extending between a proximal end and a distal end of the elongate member, the elongate member extending distally from a position at or near the base and slideable alongside the needle shaft as the needle is moved between the ready position and the retracted position, the elongate member having a length such that substantially coincident with the change in profile engaging the portion of the base circumscribing the aperture in the base the entirety of the distal tip of the needle is positioned to reside within the through passage of the elongate member and the distal section of the arm disengage with the needle shaft to move radially inward to cover the distal end of the elongate member, the elongate member being sufficiently rigid to restrict longitudinal movement of the needle with respect to the needle guard when the distal section of the arm covers the distal end of the elongate member, wherein the distal section of the arm comprises a wall segment having a distal end, the wall segment and mid-section of the arm disposed at different angular orientations with respect to the needle, the wall segment angled inwardly toward the needle, the distal end of the wall segment urged against a side of the needle shaft when the needle is in the ready position, the distal end of the wall segment configured to disengage with the needle substantially coincident with the change in profile engaging the portion of the base circumscribing the aperture in the base so that the wall segment fully covers the distal end of the elongate member. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58)
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Specification