Pressure sensing module for a catheter pressure transducer

• US 6,994,695 B1
• Filed: 04/19/2002
• Issued: 02/07/2006
• Est. Priority Date: 11/06/1999
• Status: Expired due to Term

• Current Assignee: Millar Instruments
• Original Assignee: Millar Instruments
• Inventors: Millar, Huntly D.
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US10/127,154
• Time in Patent Office: 1,390 Days
• Field of Search: 600/488, 600/486, 604/561, 604/264, 737/06, 737/08, 737/21, 73726-727
• US Class Current: 604/264
• CPC Class Codes: A61B 2562/02 Details of sensors specially adapted for in-vivo measurements
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/036 by means introduced into body tracts A61B5/032 and A61B5/035 take precedence
• CPC Class Codes: A61M 2025/0002 with a pressure sensor at the distal end

Abstract

The present invention relates to a pressure sensor module for use in catheters having a pressure sensor operable to provide a signal representative of pressure. The pressure sensor includes a sensing side and a pressure reference side. At least one signal transmission media is coupled to the sensor for transmitting the signal representative of pressure. A convex-shaped carrier is provided having a slot formed to expose the sensing side of the sensor. The convex-shaped carrier is adapted for receiving the sensor such that the sensing side of the sensor is adjacent the slot. A bonding material is provided for mounting the sensor to the carrier. The pressure sensing module provides ease of installation and manufacture because the module may easily be bonded and installed within a catheter.

Claims

1. A miniaturized pressure sensing module for determining pressure within a living body, said pressure sensing module comprising:

a sensor operable to provide a signal representative of pressure, said sensor having a sensing side and a pressure reference side;

at least one signal transmission media coupled to said sensor for transmitting the signal representative of pressure;

a semicylindrical carrier having a slot, which is formed through a wall of the carrier to expose the sensing side of said sensor to the pressure within the living body, wherein said carrier is adapted for receiving said sensor such that the sensing side of said sensor is adjacent to the slot; and

bonding material for mounting said sensor to said carrier, such that the sensing side of said sensor is coupled to a concave inner surface of the carrier;

wherein said miniaturized pressure sensing module is adapted for attachment to a catheter; and

wherein said miniaturized pressure sensing module is adapted for insertion into said living body.

2. The miniaturized pressure sensing module as claimed in claim 1, wherein said sensor is selected from a group comprising a resistive-type sensor, a capacitive-type sensor, a photoelectric-type sensor, and a strain-gauge-type sensor.

3. The miniaturized pressure sensing module of claim 1, wherein said bonding material is selected from a group comprising flexible RTV silicone rubber and epoxy resin.

4. The miniaturized pressure sensing module of claim 1, wherein said pressure reference side is exposed to atmospheric pressure.

5. The miniaturized pressure sensing module of claim 1, wherein said pressure reference side is exposed to a vacuum.

6. The miniaturized pressure sensor module of claim 1, wherein said sensor is operable to provide a signal that is representative of cardiac pressure.

7. The miniaturized pressure sensor module of claim 1, wherein said sensor is operable to provide a signal that is representative of intracranial pressure.

8. The miniaturized pressure sensor module of claim 1, wherein said sensor is operable to provide a signal that is representative of rectal pressure.

9. The miniaturized pressure sensor module of claim 1, wherein said sensor is operable to provide a signal that is representative of esophageal pressure.

10. The miniaturized pressure sensor module of claim 1, wherein said sensor is operable to provide a signal that is representative of gastrointestinal pressure.

11. The miniaturize pressure sensor module of claim 1, wherein said sensor is operable to provide a signal that is representative of blood pressure.

12. The miniaturized pressure sensor module of claim 1, wherein said sensor is operable to provide a signal that is representative of pressure in a urinary tract of said living body.

13. The miniaturized pressure sensor module of claim 1, wherein the slot is configured for exposing only a portion of the sensing side of said sensor.

14. The miniaturized pressure sensor module of claim 13, wherein a size of the slot is selected from a range comprising about 0.25 mm² to about 0.5 mm².

15. The miniaturized pressure sensor module of claim 1, wherein the carrier is formed from a substantially rigid material.

16. The miniaturized pressure sensor module of claim 13, wherein the substantially rigid material is selected from a group comprising metals and ceramics.

17. The miniaturized pressure sensor module of claim 1, wherein the carrier of the miniaturized pressure sensor module is adapted for attachment to the catheter, such that a convex outer surface of the carrier is flush with a convex outer surface of the catheter.

18. The miniaturized pressure sensor module of claim 17, wherein the sensor is coupled to the carrier, such that when the carrier is attached to the catheter, the sensor is electrically isolated from the catheter.