Protective coating for bodily sensor

• US 6,331,163 B1
• Filed: 07/16/1999
• Issued: 12/18/2001
• Est. Priority Date: 01/08/1998
• Status: Expired due to Fees

• Current Assignee: Microsense Cardiovascular Systems (1996) Ltd.
• Original Assignee: Microsense Cardiovascular Systems (1996) Ltd.
• Inventors: Kaplan, Shay
• Primary Examiner(s): O'Connor, Cary
• Assistant Examiner(s): CARTER, RYAN CHRISTOPHER
• Application Number:
  US09/354,631
• Time in Patent Office: 886 Days
• Field of Search: 600/345-347, 600/364-365, 600/371-381, 600/438, 600/486, 600/437, 600/504-505, 600/508, 600/561, 600/581, 128/DIG.21, 73/544.1
• US Class Current: 600/486
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/6862 Stents
• CPC Class Codes: A61B 5/6876 Blood vessel
• CPC Class Codes: A61B 5/6882 Anchoring means
• CPC Class Codes: A61B 8/00 Diagnosis using ultrasonic, sonic or infrasonic waves imaging of objects using sonar G01S15/00
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0002 for data transfer

Abstract

A device and method for fixation of a sensor in a bodily lumen, in which a sensor support is coupled to a fixation device, which is inserted into a bodily lumen. The fixation device is then secured within the bodily lumen, for example, by expansion or by suturing to the bodily lumen. The fixation device may be a stent or a dedicated anchoring ring having a sensor support coupled thereto. The fixation device may be inserted during an intervention procedure or during a special insertion procedure. The sensor may be remotely interrogated exterior to the bodily lumen periodically or continuously. Furthermore, the sensor may be provided with permanent and/or temporary protective coatings to protect it from damage.

Claims

1. A device for implantation into an anatomical location inside a body, comprising:

a sensor including a mechanically vibratable membrane; and

a protective layer formed from a polyxylylene polymer material and deposited on at least the mechanically vibratable membrane.

2. The device according to claim 1, wherein the protective layer has a thickness less than 4,500 Å

.

3. The device according to claim 1, wherein the protective layer has a thickness that is less than 2,500 Å

.

4. The device according to claim 1, wherein the mechanically vibratable membrane is formed from a semiconductor material.

5. The device according to claim 4, wherein the semiconductor material includes one of silicon, silicon nitride, and silicon dioxide.

6. The device according to claim 1, wherein the mechanically vibratable membrane is responsive to an anatomical characteristic of the body.

7. The device according to claim 1, wherein the protective layer prevents body fluids and tissue from degrading an operation of the mechanically vibratable membrane.

8. The device according to claim 1, wherein the protective layer includes an inert material.

9. The device according to claim 1, wherein the protective layer includes a bio-compatible material.

10. The device according to claim 1, wherein the polyxylylene polymer material includes one of poly(p-chloroxylylene), poly(p-xylylene), poly(p-dichloroxylylene), and poly(p-tetrafluoroxylylene).

11. The device according to claim 1, wherein the sensor is a passive sensor.

12. The device according to claim 6, wherein the anatomical characteristic to which the mechanically vibratable membrane is responsive includes at least one of a pressure, a temperature, and a chemical.

13. A device for implantation at an anatomical location inside a body, comprising:

a sensor having a mechanically vibratable membrane; and

a protective layer formed from a silicone rubber material and deposited on at least the mechanically vibratable membrane.

14. The device according to claim 13, wherein the protective layer has a thickness less than 5000 Å

.

15. A device for implantation at an anatomical location inside a body, comprising:

a sensor having a mechanically vibratable membrane; and

a protective layer formed from a polytetrafluoroethylene material and deposited on at least the mechanically vibratable membrane.

16. The device according to claim 15, wherein the protective layer has a thickness less than 5000 Å

.

17. The device according to claim 16, further comprising an adhesion promoter layer applied between at least one surface of the sensor and the protective layer.

18. The device according to claim 17, wherein the adhesion promoter layer includes perfluorodecyltriethoxysilane.