Puncture needle assembly
First Claim
1. A puncture needle assembly, comprising:
- (a) a hollow, open-ended stylet through which liquid may pass, the stylet being beveled at a distal end to form a point on one side of the stylet, said stylet having a stylet hub assembly fixed about a proximal end of the stylet, the stylet hub assembly including a body portion and a stabilizer fin extending outwardly from the body portion to the stylet hub assembly, the fin extending in a plane defined by the longitudinal axis of the stylet and the point of the beveled end of the stylet, the fin extending radially from a side of the stylet that is opposite the side on which the stylet point is located, and(b) a needle cannula disposed exteriorly on the stylet for slidably receiving the stylet, the needle cannula including a sleeve portion with a distal end, and terminating at a proximal end thereof in a cannula hub having a body portion and including a pair of wings extending outwardly from the cannula body portion, the wings having flexible hinge areas adjacent the cannula body portion that allow the wings to fold towards each other about the cannula axis, the body portion of the cannula hub including means for interacting with the stylet hub for releasably interlocking the cannula hub and the stylet hub in a locked position to prevent rotation of the stylet within the needle cannula, in which locked position the beveled distal end of the stylet extends outside the distal end of the needle cannula and the stabilizer fin is disposed between the cannula wings and positioned substantially equidistant from the hinge areas of the cannula wings so that the stylet fin can be gripped between the cannula wings when folded towards each other substantially symmetrically with respect to said plane.
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Accused Products
Abstract
A puncture needle assembly includes a hollow, open-ended stylet with a beveled distal end and an outwardly extending stabilizer fin located at the proximal end of the stylet in line with the beveled end of the stylet. A needle cannula is disposed exteriorly on the stylet for slidably receiving the stylet. The needle cannula releasably interlocks with the stylet, and includes a pair of wings that fold towards each other for gripping the stabilizer fin of the stylet in the interlocked position, with the proximal end of the stylet spaced away from the wing fold portions to facilitate visibility of blood passing from a blood vessel through the stylet out an opening in the proximal end thereof.
165 Citations
16 Claims
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1. A puncture needle assembly, comprising:
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(a) a hollow, open-ended stylet through which liquid may pass, the stylet being beveled at a distal end to form a point on one side of the stylet, said stylet having a stylet hub assembly fixed about a proximal end of the stylet, the stylet hub assembly including a body portion and a stabilizer fin extending outwardly from the body portion to the stylet hub assembly, the fin extending in a plane defined by the longitudinal axis of the stylet and the point of the beveled end of the stylet, the fin extending radially from a side of the stylet that is opposite the side on which the stylet point is located, and (b) a needle cannula disposed exteriorly on the stylet for slidably receiving the stylet, the needle cannula including a sleeve portion with a distal end, and terminating at a proximal end thereof in a cannula hub having a body portion and including a pair of wings extending outwardly from the cannula body portion, the wings having flexible hinge areas adjacent the cannula body portion that allow the wings to fold towards each other about the cannula axis, the body portion of the cannula hub including means for interacting with the stylet hub for releasably interlocking the cannula hub and the stylet hub in a locked position to prevent rotation of the stylet within the needle cannula, in which locked position the beveled distal end of the stylet extends outside the distal end of the needle cannula and the stabilizer fin is disposed between the cannula wings and positioned substantially equidistant from the hinge areas of the cannula wings so that the stylet fin can be gripped between the cannula wings when folded towards each other substantially symmetrically with respect to said plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A puncture needle assembly, comprising:
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(a) a hollow, open-ended stylet through which liquid may pass, the stylet being beveled at a distal end to form a point on one side of the stylet, said stylet having a stylet hub assembly fixed about a proximal end of the stylet, the stylet hub assembly including a body portion and a stabilizer fin extending outwardly from the body portion to the stylet hub assembly, the fin extending in a plane defined by the longitudinal axis of the stylet and the point of the beveled end of the stylet, the fin extending radially from a side of the stylet that is opposite the side on which the stylet point is located, and (b) a needle cannula disposed exteriorly on the stylet for slidably receiving the stylet, the needle cannula including a sleeve portion with a distal end, and terminating at a proximal end thereof in a cannula hub having a body portion and including a pair of wings extending outwardly from the cannula body portion, each wing being connected by a corresponding hinge to the cannula body portion on opposite sides thereof and perpendicularly thereto in a plane extending through the cannula axis, which hinges allow the wings to fold toward each other about the cannula axis, the body portion of the cannula hub including means for interacting with the stylet hub for releasably interlocking the cannula hub and the stylet hub in a locked position to prevent rotation of the stylet within the needle cannula, in which locked position the beveled distal end of the stylet extends outside the distal end of the needle cannula and the stabilizer fin is disposed between the cannula wings and positioned sustantially equidistant from the hinges of the cannula wings so that the stylet fin can be gripped between the cannula wings when folded toward each other substantially symmetrically with respect to said plane.
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Specification