Neuro decompression device

• US 6,106,558 A
• Filed: 09/15/1997
• Issued: 08/22/2000
• Est. Priority Date: 09/15/1997
• Status: Expired due to Term

• Current Assignee: Applied Medical Research
• Original Assignee: Applied Medical Research
• Inventors: Picha, George J.
• Primary Examiner(s): SNOW, BRUCE EDWARD
• Application Number:
  US08/929,917
• Time in Patent Office: 1,072 Days
• Field of Search: 623/8, 623/11.11, 623/17, 623/11, 623/66, 623/13, 606/76, 606/152, 606/23.74, 424/484, 424/486
• US Class Current: 623/23.74
• CPC Class Codes: A61B 17/70 Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2090/0816 for preventing adhesion
• CPC Class Codes: A61F 2/00 Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents as cosmetic articles, see the relevant subclasses, e.g. wigs, hair pieces, A41G3/00, A41G5/00; artificial nails A45D31/00; dental prostheses A61C13/00; materials for prostheses A61L27/00; artificial hearts A61M60/00; artificial kidneys A61M1/14
• CPC Class Codes: A61F 2/0077 Special surfaces of prostheses, e.g. for improving ingrowth A61F2/30767 takes precedence
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61L 31/14 Materials characterised by their function or physical properties , e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials

Abstract

A neuro decompression device is disclosed that significantly reduces fibroplasia proximate to nerve tissue. The device utilizes particular surface topographies to disrupt scar tissue formation around nerves, and which may include one or more drugs to influence tissue growth.

Claims

1. A neuro decompression device for placement proximate to a nerve disposed in a canal extending through hard tissue or bone, said device comprising a flexible shielding body sized to cover said nerve in said canal, said shielding body being movable between an unflexed state outside of the canal, wherein the shielding body is generally rectangular in shape, and a flexed state inside the canal, wherein the shielding body is rolled in a cuff share and disposed about a periphery of the nerve, said shielding body having an outer surface texturized with outwardly-extending microstructures to reduce fibroplasia in the vicinity of said device, said microstructures having a height of about 50 microns to about 5,000 microns.

2. The neuro decompression device of claim 1, said device further comprising an agent that affects tissue growth.

3. The neuro decompression device of claim 2, wherein said agent is a drug that inhibits the formation of adhesions to said device.

4. The neuro decompression device of claim 3, wherein said drug is selected from the group consisting of steroids, chondroitin sulfates, polyvinylpyrrolidone, glycoproteins, mucopolysaccharides, and combinations thereof.

5. The neuro decompression device of claim 1, wherein said microstructures comprise a plurality of outwardly extending projections, said projections having a combination of dimensions selected from the group consisting of (1) an approximate height of 750 microns and an approximate width of 250 microns, and (2) an approximate height of 1600 microns and an approximate width of 800 microns.

6. The neuro decompression device of claim 5, wherein said 250 micron wide projections are spaced from each other a distance of from about 100 microns to about 1250 microns.

7. The neuro decompression device of claim 5, wherein said 800 micron wide projections are spaced from each other a distance of from about 320 microns to about 4000 microns.

8. The neuro decompression device of claim 5, said device further comprising a drug selected from the group consisting of steroids, chondroitin sulfates, polyvinylpyrrolidone, glycoproteins, mucopolysaccharides, and combinations thereof.

9. The neuro decompression device of claim 1, wherein said microstructures comprise a plurality of fins arranged in an offset pattern.

10. The neuro decompression device of claim 9, wherein each of said fins has a length to width ratio of from about 3:

1 to about 10;

1.

11. The neuro decompression device of claim 10, wherein said ratio is from about 4:

1 to about 6;

1.

12. The neuro decompression device of claim 9, wherein each of said fins has a width of from about 100 to about 1000 microns wide.

13. The neuro decompression device of claim 12, wherein said width is between about 200 and about 500 microns.

14. The neuro decompression device of claim 9, wherein each of said fins has a height from about 200 to about 2500 microns.

15. The neuro decompression device of claim 14, wherein said height is between about 1000 and about 2000 microns.

16. The neuro decompression device of claim 9, said device further comprising a drug selected from the group consisting of steroids, chondroitin sulfates, polyvinylpyrrolidone, glycoproteins, mucopolysaccharides, and combinations thereof.