Locking assembly for medical device

Abstract

A medical device assembly may include a stylet having a distal stylet body and a proximal stylet hub, a cannula having a distal cannula body and a proximal cannula hub, and a lock for securing the stylet to the cannula, wherein the lock includes at least one abutment on at least one of the stylet hub and the cannula hub for restricting relative movement between the stylet hub and the cannula hub.

1 - 20 . (canceled) 
     
     
         21 . A medical device assembly, comprising:
 a stylet having a stylet body and a stylet hub, wherein the stylet hub includes two clasp arms, and wherein each clasp arm includes an anchor; and   a cannula having a cannula body and a cannula hub, wherein the cannula hub includes a locking protrusion;   wherein a proximal surface of each anchor of the clasp arms is in contact with the locking protrusion in a locked configuration of the stylet and the cannula, to restrict withdrawal of one of the stylet hub or the cannula hub from the other of the stylet hub or the cannula hub.   
     
     
         22 . The medical device assembly of  claim 21 , wherein the proximal surface of each anchor of the clasp arms is not in contact with the locking protrusion in an unlocked configuration of the stylet and the cannula. 
     
     
         23 . The medical device assembly of  claim 21 , wherein each clasp arm is coupled to a hinge. 
     
     
         24 . The medical device assembly of  claim 21 , wherein each clasp arm includes a curvature at a proximal portion of the clasp arm. 
     
     
         25 . The medical device assembly of  claim 24 , wherein each clasp arm is biased in a radially inward direction towards a central longitudinal axis of the stylet. 
     
     
         26 . The medical device assembly of  claim 21 , wherein the clasp arms are distal most portions of the stylet hub. 
     
     
         27 . The medical device assembly of  claim 21 , wherein each clasp arm includes gripping ridges on a proximal end portion of the clasp arm. 
     
     
         28 . The medical device assembly of  claim 21 , wherein a proximal end portion of each clasp arm extends proximally beyond a top surface of a cylindrical portion of the stylet hub. 
     
     
         29 . The medical device assembly of  claim 21 , wherein a proximal portion of the cannula hub is within the stylet hub when the medical device assembly is in the locked configuration. 
     
     
         30 . The medical device assembly of  claim 21 , wherein the cannula hub includes ridges. 
     
     
         31 . The medical device assembly of  claim 21 , wherein each clasp arm includes a recess. 
     
     
         32 . The medical device assembly of  claim 31 , wherein the recesses are configured to receive the locking protrusion. 
     
     
         33 . The medical device assembly of  claim 31 , wherein the recesses are proximal to the anchors. 
     
     
         34 . A medical device assembly, comprising:
 a stylet having a stylet body and a stylet hub, wherein the stylet hub includes two clasp arms, and wherein each clasp arm includes an anchor; and   a cannula having a cannula body and a cannula hub, wherein the cannula hub includes a locking protrusion;   wherein a proximal surface of each anchor of the clasp arms is in contact with a distally facing surface of the locking protrusion in a locked configuration of the stylet and the cannula, to restrict withdrawal of one of the stylet hub or the cannula hub from the other of the stylet hub or the cannula hub; and   wherein an application of pressure to proximal end portions of the clasp arms transitions the stylet and the cannula from the locked configuration to an unlocked configuration in which one of the stylet hub or cannula hub is releasable from the other of the stylet hub or the cannula hub.   
     
     
         35 . The medical device assembly of  claim 34 , wherein a distal portion of the stylet hub includes a curvature to facilitate an insertion of the locking portion within the stylet hub. 
     
     
         36 . The medical device assembly of  claim 34 , wherein the clasp arms are on opposite sides of the stylet hub. 
     
     
         37 . A medical device assembly, comprising:
 a stylet having a stylet body and a stylet hub, wherein the stylet hub includes two clasp arms and a hinge coupled to each clasp arm, and wherein each clasp arm includes an anchor; and   a cannula having a cannula body and a cannula hub, wherein the cannula hub includes a locking protrusion;   wherein the anchors are in contact with the locking protrusion in a locked configuration to restrict withdrawal of one of the stylet hub or the cannula hub from the other of the stylet hub or the cannula hub; and   wherein the clasp arms are distal most portions of the stylet hub.   
     
     
         38 . The medical device assembly of  claim 37 , wherein each clasp arm includes a recess configured to receive the locking protrusion when the medical device assembly is in the locked configuration. 
     
     
         39 . The medical device assembly of  claim 37 , wherein the clasp arms are on opposite sides of the stylet hub. 
     
     
         40 . The medical device assembly of  claim 37 , wherein each clasp arm is biased in a radially inward direction towards a central longitudinal axis of the stylet.