Magnetic Shield For Medical Devices

Patent metadata

Field	Value
Publication number	US-2017326342-A1
Application number	US-201615154348-A
Country	US
Kind code	A1
Filing date	May 13, 2016
Priority date	May 13, 2016
Publication date	Nov 16, 2017
Grant date	—

Abstract

A medical device such as a needle subassembly is disclosed including a cover over a magnetized portion of a tissue-penetrating medical device having a shielding material associated with the cover that prevents the magnetized portion of the tissue-penetrating medical device from being de-magnetized when the cover is positioned to cover the tissue-penetrating medical device.

First claim

What is claimed is:

1 . A needle subassembly comprising:
a needle including a shaft having a magnetized portion; a cover sized to provide a protective closure over the magnetized portion of the shaft; and a shielding material associated with the cover that prevents the magnetized portion of the shaft from being de-magnetized when the cover is positioned to cover the shaft.

2 . The needle subassembly of claim 1 , wherein the shielding material is a highly conductive material.

3 . The needle subassembly of claim 2 , wherein the shielding material comprises copper.

4 . The needle subassembly of claim 1 , wherein the shielding material has a high magnetic permeability.

5 . The needle subassembly of claim 4 , wherein the shielding material comprises an alloy of nickel and iron metals.

6 . The needle subassembly of claim 4 , wherein the shielding material includes a ferromagnetic metal coating.

7 . The needle subassembly of claim 1 , wherein the shielding material includes a highly conductive material and includes a ferromagnetic metal coating.

8 . The needle subassembly of claim 7 , wherein the highly conductive material comprises copper.

9 . The needle subassembly of claim 1 , wherein the cover is selected from a needle cover, catheter packaging or a shipping container.

10 . The needle subassembly of claim 1 , wherein the shielding material is spray-coated onto an interior surface of the cover.

11 . The needle subassembly of claim 1 , wherein the shielding material is spray-coated onto an exterior surface of the cover.

12 . The needle subassembly of claim 1 , wherein the shielding material is spray-coated onto an interior surface and exterior surface of the cover.

13 . The needle subassembly of claim 1 , wherein the shielding material is insert-molded into the cover.

14 . The needle subassembly of claim 1 , wherein the cover is molded from a plastic having conductive additives.

15 . The needle subassembly of claim 1 , wherein the cover is molded from a plastic having magnetic additives.

16 . The needle subassembly of claim 1 , wherein the cover is made of a magnetic shielding material.

17 . The needle subassembly of claim 16 , wherein the shielding material is a highly conductive material.

18 . The needle subassembly of claim 17 , wherein the shielding material comprises copper.

19 . The needle subassembly of claim 16 , wherein the shielding material has a high magnetic permeability.

20 . The needle subassembly of claim 19 , wherein the shielding material comprises an alloy of nickel and iron metals.

21 . A medical device comprising:
a tissue-penetrating device having a magnetized portion; and a cover sized to provide a protective closure over the magnetized portion of the tissue-penetrating medical device, wherein the cover comprises a shielding material that prevents the magnetized portion of the tissue-penetrating medical device from being de-magnetized when the cover is positioned to cover the tissue-penetrating medical device.

22 . The medical device of claim 21 , wherein the shielding material is a highly conductive material.

23 . The medical device of claim 22 , wherein the highly conductive material comprises copper.

24 . The medical device of claim 21 , wherein the shielding material has a high magnetic permeability.

25 . The medical device of claim 24 , wherein the shielding material comprises an alloy of nickel and iron metals.

26 . The medical device of claim 21 , wherein the shielding material includes a ferromagnetic metal coating.

27 . The medical device of claim 21 , wherein the shielding material includes a highly conductive material and has a ferromagnetic metal coating.

28 . The medical device of claim 21 , wherein the shielding material is spray-coated onto a surface of the cover.

29 . The medical device of claim 28 , wherein the surface of the cover is an interior surface.

30 . The medical device of claim 28 , wherein the surface of the cover is an exterior surface.

31 . The medical device of claim 21 , wherein the shielding material is insert-molded into the cover.

32 . The medical device of claim 21 , wherein the tissue-penetrating device comprises an introducer needle having a length and a tip, and the cover is sized to cover the tip and the length of the introducer needle.

Assignees

• Becton Dickinson Co

Inventors

• Ma Yiping
• O'Bryan Jeffrey C
• Isaacson S Ray

Classifications

• A61M5/329

  characterised by features of the needle shaft · 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

• A61M5/1626

  Needle protectors therefor (in combination with syringes A61M5/3202; protectors for sharps A61B50/3001) · CPC title

• A61M25/065

  Guide needles · CPC title

• A61B2017/3413

  guided by ultrasound · CPC title