Cover for tissue penetrating device with integrated magnets and magnetic shielding

Patent metadata

Field	Value
Publication number	US-11062833-B2
Application number	US-201916275817-A
Country	US
Kind code	B2
Filing date	Feb 14, 2019
Priority date	Aug 30, 2016
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

A cover for magnetizing a shaft of a tissue-penetrating medical device is disclosed including a sleeve member having a hollow body to form a protective closure over the shaft of the tissue-penetrating medical device. The proximal end of the hollow body provides a receiving space for receiving the shaft of the tissue-penetrating medical device. One or more magnet is disposed on the sleeve member. A magnetic shield composed of one or more shielding materials associated with the cover that minimizes any effects to the clinical environment from magnetic fields generated within the cover. Medical devices, assemblies and methods of magnetizing the shaft of a tissue-penetrating medical device using the cover are also disclosed.

First claim

What is claimed is:

1. An assembly comprising:
a tissue-penetrating medical device having a distal tip, a housing, and a shaft mounted to
the housing by a hub, the hub including a hub magnet; and
a cover for magnetizing the tissue-penetrating medical device, the cover including a sleeve member having a hollow body with an exterior surface, an interior surface, a proximal end, and a distal end to form a protective closure over a shaft of a tissue-penetrating medical device having a longitudinal axis, the proximal end of the hollow body providing a receiving space for receiving at least a shaft of the tissue-penetrating medical device; one or more magnets disposed along the sleeve member effective to magnetize the shaft; and a magnetic shield composed of one or more shielding materials spray-coated onto the sleeve member, a first face of the one or more magnets being exposed to the receiving space and an opposite face of the one of one or more magnets being exposed to the magnetic shield.

2. The assembly of claim 1 , wherein the receiving space permits movement of the shaft of the tissue-penetrating medical device in the receiving space in a direction parallel to the longitudinal axis of the tissue-penetrating medical device.

3. The assembly of claim 1 , wherein the receiving space permits movement of the shaft of the tissue-penetrating medical device into and out of the receiving space.

4. The assembly of claim 1 , wherein two or more magnets are disposed along the interior surface of sleeve member.

5. The assembly of claim 1 , wherein the one or more shielding material is a highly conductive material.

6. The assembly of claim 5 , wherein the one or more shielding material comprises copper.

7. The assembly of claim 1 , wherein the one or more shielding material has a high magnetic permeability.

8. The assembly of claim 7 , wherein the one or more shielding material comprises an alloy of nickel and iron metals.

9. The assembly of claim 8 , wherein the one or more shielding material includes a ferromagnetic metal coating.

10. The assembly of claim 1 , wherein the one or more shielding material includes a highly conductive material and includes a ferromagnetic metal coating.

11. The assembly of claim 10 , wherein the highly conductive material comprises copper.

12. The assembly of claim 1 , wherein the one or more shielding material is spray-coated onto an exterior surface of the cover.

13. The assembly of claim 1 , wherein the one or more shielding material is spray-coated onto an interior surface of the cover.

14. The assembly of claim 1 , wherein the tissue-penetrating medical device is a needle assembly, a stylet, catheter, introducer needle, scalpel or guidewire.

15. The assembly of claim 1 , wherein the one or more magnets comprises a fixed permanent magnet.

16. The assembly of claim 1 , wherein the hub magnet comprises a fixed permanent magnet.

17. The assembly of claim 1 , wherein the shielding material may be insert-molded into the cover.

18. The assembly of claim 1 , wherein the shaft of the tissue-penetrating medical device comprises a magnetizable metallic material.

19. The assembly of claim 1 , wherein the shielding material is spray-coated to a thickness of 1/1000th of an inch to 1 inch.

Assignees

• Becton Dickinson Co

Inventors

• Ma Yiping
• Burkholz Jonathan Karl
• Harding Weston F
• Isaacson S Ray
• O'Bryan Jeffrey C

Classifications

• A61M2205/0272

  Electro-active or magneto-active materials · CPC title

• A61M25/0612 Primary

  Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders · CPC title

• A61M25/0127

  Magnetic means; Magnetic markers · CPC title

• A61M5/427

  Locating point where body is to be pierced, e.g. vein location means using ultrasonic waves, injection site templates · CPC title

• A61M5/3202 Primary

  Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001) · CPC title