Medical needle having a closed tip
First Claim
1. A needle, comprisinga tubular side wall defining an internal bore, the tubular side wall further defining a longitudinal axis;
- a concave end wall disposed at a distal end of the side wall, the end wall angled relative to the longitudinal axis;
a closed tip defined by a region that includes a distal-most interface of the end wall and the tubular side wall; and
a proximal point defined by a region that includes a proximal-most interface of the end wall and the tubular side wall;
wherein a distal opening is defined spaced from the closed tip and provides access to the internal bore;
wherein the end wall has a variable concavity profile, as viewed in sequential cross sections taken normal to the longitudinal axis; and
wherein the concavity of the end wall decreases as the end wall extends away from the closed tip, as viewed in sequential cross sections taken normal to the longitudinal axis, so that the end wall is comparatively more concave in proximity to the closed tip than it is in proximity to the proximal point.
0 Assignments
0 Petitions
Accused Products
Abstract
A needle is provided, having a closed tip configured to minimize tissue damage from penetration of the needle. The needle includes a tubular side wall defining an internal bore. The needle further includes an end wall angled relative to the needle'"'"'s longitudinal axis and disposed at the distal end of the needle. The needle defines a distal opening spaced from the closed tip, providing access to the internal bore to facilitate fluid transfer. Preferably, the needle is configured to create a crescent-shaped penetration mark. The number and positioning of openings can be varied across embodiments of the invention, while maintaining a closed tip. For example, in certain embodiments, the needle comprises two distal openings defined by the side wall. A distal opening can also be provided by the end wall singly or in combination with additional distal openings.
32 Citations
25 Claims
-
1. A needle, comprising
a tubular side wall defining an internal bore, the tubular side wall further defining a longitudinal axis; -
a concave end wall disposed at a distal end of the side wall, the end wall angled relative to the longitudinal axis; a closed tip defined by a region that includes a distal-most interface of the end wall and the tubular side wall; and a proximal point defined by a region that includes a proximal-most interface of the end wall and the tubular side wall; wherein a distal opening is defined spaced from the closed tip and provides access to the internal bore; wherein the end wall has a variable concavity profile, as viewed in sequential cross sections taken normal to the longitudinal axis; and wherein the concavity of the end wall decreases as the end wall extends away from the closed tip, as viewed in sequential cross sections taken normal to the longitudinal axis, so that the end wall is comparatively more concave in proximity to the closed tip than it is in proximity to the proximal point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A needle, comprising
a tubular side wall defining an internal bore, the tubular side wall further defining a longitudinal axis; -
a concave end wall disposed at a distal end of the side wall such that an interface of the side wall and the end wall defines a rim circumscribing the end wall, the end wall angled relative to the longitudinal axis; and a closed tip at the distal end, the closed tip including a distal-most portion of the interface of the end wall and the tubular side wall such that the closed tip is offset from the longitudinal axis; wherein a distal opening is defined spaced from the closed tip and provides access to the internal bore; wherein the end wall defines an end wall axis extending substantially orthogonally to the end wall; and wherein the rim circumscribing the end wall is arced convexly relative to a plane extending orthogonally to the end wall axis. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
-
21. A needle, comprising
a tubular side wall defining an internal bore, the tubular side wall further defining a longitudinal axis; -
a concave end wall disposed at a distal end of the side wall, the end wall angled relative to the longitudinal axis, the end wall having a variable concavity profile, as viewed in sequential cross sections taken normal to the longitudinal axis; a closed tip defined by a region that includes a distal-most interface of the end wall and the tubular side wall such that the closed tip is offset from the longitudinal axis, the closed tip having a rounded top profile and an acutely angled side profile; and a proximal point defined by a region that includes a proximal-most interface of the end wall and the tubular side wall; wherein a distal opening is defined by the side wall, spaced from the closed tip and in proximity to the end wall, providing access to the internal bore; wherein the concavity of the end wall decreases as the end wall extends away from the closed tip, as viewed in sequential cross sections taken normal to the longitudinal axis, so that the end wall is comparatively more concave in proximity to the closed tip than it is in proximity to the proximal point. - View Dependent Claims (22, 23, 24, 25)
-
Specification