IP Library › Granted Patent US 12,376,881
Granted Patent B2
US 12,376,881 · App. 17/956,106 · Granted Aug 5, 2025

Safety shields for elongated instruments and related systems and methods

Inventors: Jay Muse (Salt Lake City, UT); Ryan S. VanDyke (Layton, UT)
Assignee: Piper Access, LLC
A61B17/3496A61B17/1617A61B17/3472A61B17/3476A61B17/3494A61B2017/00398A61B2017/00477A61B2017/00876A61B17/1633A61B2017/347A61B2090/0801
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Quick Facts
Patent No.
US 12,376,881
App. No.
17/956,106
Granted
Aug 5, 2025
Kind
B2
Abstract

A system can include an elongated instrument that is positioned within a cannula portion of a cannula assembly. The system can include a shield that is coupled with both the elongated instrument and the cannula assembly when in an unlocked state. The shield can permit proximal movement of the elongated instrument relative thereto when in the unlocked state. The shield can automatically transition to a locked state to attach to a distal end of the elongated instrument to restrict access to a distal tip of the elongated instrument.

Claims (51)

1. A system comprising:

a cannula assembly comprising:

a cannula hub; and

a cannula attached to the cannula hub, the cannula being configured for introduction into a mammalian body and defining a lumen;

an elongated instrument comprising a distal tip and a recess that is proximally spaced from the distal tip, the elongated instrument being positioned within the lumen of the cannula; and

a shield coupled with each of the cannula hub and the elongated instrument while in an unlocked state, the shield comprising:

a collar at a distal end of the shield that defines an opening through which the elongated instrument extends while the shield is in the unlocked state; and

an arm that comprises a distal end connected to the collar and a proximal portion, the proximal portion being maintained in a laterally deflected state by the elongated instrument such that the arm engages the cannula hub when the shield is in the unlocked state,

wherein the shield is configured to:

remain in the unlocked state while permitting proximal movement of the elongated instrument relative to the shield as the elongated instrument is retracted from the lumen of the cannula; and

transition from the unlocked state to a locked state when the recess of the elongated instrument is moved proximally to a position at which the proximal portion of the arm automatically moves laterally to enter the recess and the arm thereby disengages from the cannula hub.

2. The system of claim 1 , wherein the arm is resilient such that an internal bias is present when the arm is in the laterally deflected state, and wherein the arm naturally moves inward due to the internal bias when the shield transitions from the unlocked stated to the locked state.

3. The system of claim 1 , wherein the arm further comprises a connection interface that is proximal to the collar and distal to the proximal portion, and wherein the arm engages the cannula hub via the connection interface when the shield is in the unlocked state.

4. The system of claim 3 , wherein the connection interface of the arm comprises an outwardly directed protrusion.

5. The system of claim 4 , wherein the coupling cannula hub comprises a groove that interfaces with the outwardly directed protrusion to maintain the shield coupled with the cannula hub when the shield is in the unlocked state.

6. The system of claim 1 , wherein the proximal portion of the arm comprises a lateral extension.

7. The system of claim 6 , wherein the lateral extension defines an opening through which the elongated instrument passes.

8. The system of claim 7 , wherein the opening of the lateral extension fully encompasses the elongated instrument.

9. The system of claim 1 , wherein:

the elongated instrument comprises a contact surface;

the recess of the elongated instrument is laterally recessed relative to the contact surface;

the proximal portion of the arm comprises a contact region that translates along the contact surface of the elongated instrument as the elongated instrument is retracted from the lumen of the cannula to maintain the shield in the unlocked state; and

at least a portion of the contact region of the arm enters into the recess of the elongated instrument to restrict translational movement of the shield relative to the elongated instrument as the shield transitions to the locked state.

10. A system comprising:

a cannula assembly comprising:

a cannula hub that comprises a lumen and a proximal end; and

a cannula attached to the cannula hub, the cannula being configured for introduction into a mammalian body and defining a lumen;

an elongated instrument comprising a distal tip and a recess that is proximally spaced from the distal tip, the elongated instrument being positioned within the lumen of the cannula; and

a shield comprising an arm that is configured to transition the shield from an unlocked state to a locked state as the elongated instrument is moved proximally relative to the shield,

wherein when the shield is in the unlocked state, a first portion of the arm is positioned within the lumen of the cannula hub and engages the cannula hub to couple the shield with the cannula hub and a second portion of the arm is positioned proximally beyond the proximal end of the cannula hub and contacts an outer surface of the elongated instrument, and

wherein when the shield transitions to the locked state, the second portion of the arm moves laterally inwardly into the recess of the elongated instrument and the first portion of the arm disengages from the cannula hub to decouple the shield from the cannula hub.

11. The system of claim 10 , wherein the arm is resilient such that an internal bias is present when the shield is in the unlocked state, and wherein the arm naturally moves laterally inwardly due to the internal bias when the shield transitions from the unlocked stated to the locked state.

12. The system of claim 10 , wherein the arm comprises a connection interface positioned within the lumen of the cannula hub when the shield is in the unlocked state, and wherein the arm engages the cannula hub via the connection interface when the shield is in the unlocked state.

13. The system of claim 12 , wherein the connection interface of the arm comprises an outwardly directed protrusion.

14. The system of claim 13 , wherein the cannula hub comprises a groove that interfaces with the outwardly directed protrusion to maintain the shield coupled with the cannula hub when the shield is in the unlocked state.

15. The system of claim 10 , wherein the second portion of the arm comprises a lateral extension.

16. The system of claim 15 , wherein the lateral extension defines an opening through which the elongated instrument passes.

17. The system of claim 16 , wherein the opening of the lateral extension fully encompasses the elongated instrument.

18. The system of claim 10 , wherein the shield comprises a collar connected to a distal end of the arm, the shield defining an opening through which the elongated instrument extends when the shield is in the unlocked state.

19. A system comprising:

a cannula assembly comprising:

a cannula hub; and

a cannula attached to the cannula hub, the cannula being configured for introduction into a mammalian body and defining a lumen;

an elongated instrument comprising a distal tip and a recess that is proximally spaced from the distal tip, the elongated instrument being positioned within the lumen of the cannula; and

a shield coupled with each of the cannula hub and the elongated instrument while in an unlocked state, the shield comprising:

a collar at a distal end of the shield that defines an opening through which the elongated instrument extends while the shield is in the unlocked state; and

an arm that comprises a distal end connected to the collar and a proximal end that is maintained in a deflected orientation by the elongated instrument

when the shield is in the unlocked state,

wherein the shield is configured to automatically transition from the unlocked state to a locked state as the elongated instrument is retracted from the lumen of the cannula to a position at which the proximal end of the arm moves away from the deflected orientation and enters the recess of the elongated instrument, and

wherein, when the shield is in the locked state, the distal tip of the elongated instrument is positioned within the shield and the opening of the collar remains open.

20. The system of claim 19 , wherein a portion of the arm that is proximal to the collar and distal to the proximal end of the arm engages the cannula hub when the proximal end of the arm is maintained in the deflected orientation and disengages from the cannula hub when the proximal end of the arm moves away from the deflected orientation.

Continuity (4)
Continuation 15914964 · Mar 7, 2018
Provisional Application 62525663 · Jun 27, 2017
Provisional Application 62600857 · Mar 7, 2017
Related Publication 20230026800A1 · Jan 26, 2023
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