Cover for tissue penetrating device with integrated magnets and magnetic shielding

Patent metadata

Field	Value
Publication number	US-10249424-B2
Application number	US-201816040991-A
Country	US
Kind code	B2
Filing date	Jul 20, 2018
Priority date	Aug 30, 2016
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

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 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. A cover for magnetizing a tissue-penetrating medical device comprising:
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 exterior surface of 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 exterior surface of the sleeve with the spray-coated magnetic shield.

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

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

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

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

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

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

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

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

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

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

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

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

16. The cover 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

• H05K9/0075

  Magnetic shielding materials · CPC title

• A61B34/20

  Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis · 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

• A61B50/3001

  for sharps · CPC title

• A61M2205/0272

  Electro-active or magneto-active materials · CPC title