Production of lubricious coating on adhesive hydrogels

• US 6,846,291 B2
• Filed: 11/20/2002
• Issued: 01/25/2005
• Est. Priority Date: 11/20/2002
• Status: Expired due to Fees

• Current Assignee: Next Medical Products Company
• Original Assignee: Sonotech, Inc. (Illinois Tool Works Inc.)
• Inventors: Smith, Larry L., Lowman, Anthony M.
• Primary Examiner(s): IMAM, ALI M
• Application Number:
  US10/300,217
• Publication Number:
  US 20040097807A1
• Time in Patent Office: 797 Days
• Field of Search: 600/407, 600/437, 600/439, 600/438, 600/440, 600441-459, 600461-471, 736/25, 736/18, 736/26, 736/44, 128/916, 607/152, 601/2, 604/20, 604/22, 424/9.52, 424/9.51
• US Class Current: 600/459
• CPC Class Codes: A61B 8/4281 characterised by sound-transmitting media or devices for coupling the transducer to the tissue

Abstract

Method and formulations to extend the utility of ultrasound compliant adhesive hydrogel membranes from static to dynamic applications by modifying the surface of at least one face so as to transform the tactile nature of the surface from one that is adhesive and render it smooth and lubricious. Such modification thus provides one face that is smooth and lubricious and the other unmodified, hence providing one adhesive surface that can be attached to the skin of a patient, the face of an ultrasound probe or other surfaces that benefit from the adhesive/lubricious configuration of such modified adhesive hydrogels.

Claims

1. An ultrasound acoustic coupling hydrogel membrane comprising a first adhesive side and a second adhesive side, said second adhesive side having a coating of at least one of glycols and polyglycols hydrogen bonded thereto said coating being lubricious.

2. The membrane of claim 1 wherein said at least one of glycols and polyglycols comprises polyethylene glycol.

3. The membrane of claim 2 wherein said polyethylene glycol has a molecular weight of up to 20,000 daltons.

4. The membrane of claim 3 wherein said polyethylene glycol has a molecular weight of 4800 to 8000 daltons.

5. The membrane of claim 4 wherein said polyethylene glycol has a molecular weight of 8000 daltons.

6. The membrane of claim 5 wherein said polyethylene glycol Is present in a solution further Including water, said solution comprising polyethylene glycol in a concentration of 50% by weight, the balance water.

7. The membrane of claim 1 wherein said at least one of glycols and polyglycols comprises polyethylene oxide.

8. The membrane of claim 7 wherein said polyethylene oxide has a molecular weight of up to 1,000,000 daltons.

9. The membrane of claim 1 wherein said at least one of glycols and polyglycols are biocompatible.

10. The membrane of claim 1 wherein said hydrogel membrane comprises one of (a) polyethylene oxide and polyvinylpyrrilodone, (b) polyvinylpyrrilodone or (c) a conductive hydrogel.

11. A method of producing an ultrasound acoustic coupling hydrogel membrane, said method comprising:

providing a hydrogel membrane having a first adhesive side and a second adhesive side,

contacting one of said first and second sides with at least one of glycols and polyglycols whereby a lubricious coating is formed that is hydrogen bonded to the contacted side.

12. The method of claim 11 wherein said at least one of glycols and polyglycols comprises polyethylene glycol.

13. The method of claim 12 wherein said polyethylene glycol has a molecular weight of up to 20,000 daltons.

14. The method of claim 13 wherein said polyethylene glycol has a molecular weight of 4800 to 8000 daltons.

15. The method of claim 14 wherein said polyethylene glycol has a molecular weight of 8000 daltons.

16. The method of claim 15 wherein said polyethylene glycol is present in a solution further including water, said solution comprising polyethylene glycol in a concentration of 50% by weight, the balance water.

17. The method of claim 11 wherein said at least one of glycols and polyglycols comprises polyethylene oxide.

18. The method of claim 17 wherein said polyethylene oxide has a molecular weight of up to 1,000,000 daltons.

19. The method of claim 11 wherein said at least one of glycols and polyglycols are biocompatible.

20. The method of claim 11 wherein the one contacted side remains lubricious for at least 15 minutes after said contacting.

21. The method of claim 11 wherein said at least one of glycols and polyglycols are in essentially pure form.

22. The method of claim 11 wherein said at least one of glycols and polyglycols are in solution with water in concentrations of 0.25 to 99%.

23. The method of claim 11 wherein said hydrogel membrane comprises one of (a) polyethylene oxide arid polyvinylpyrrilodone, (b) polyvinylpyrrilodone or (c) a conductive hydrogel.