RF transmission module for wirelessly transmitting balloon catheter data in a syringe inflation system

• US 5,453,091 A
• Filed: 04/05/1994
• Issued: 09/26/1995
• Est. Priority Date: 03/17/1989
• Status: Expired due to Term

• Current Assignee: Merit Medical Systems, Inc.
• Original Assignee: Merit Medical Systems, Inc.
• Inventors: Lampropoulos, Fred P., Taylor, Steven R., Durham, Christopher L.
• Primary Examiner(s): Yasko, John D.
• Assistant Examiner(s): CERMAK, ADAM
• Application Number:
  US08/223,514
• Time in Patent Office: 539 Days
• Field of Search: 128/903, 604/97, 604/100, 604/118, 604/121
• US Class Current: 604/100.03
• CPC Class Codes: A61M 25/10182 Injector syringes
• CPC Class Codes: A61M 25/10184 Means for controlling or monitoring inflation or deflation
• CPC Class Codes: A61M 25/10188 Inflation or deflation data displays
• CPC Class Codes: G01D 9/00 Recording measured values
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

An electronically controlled syringe system for connection to a balloon catheter or other balloon-type member and for monitoring, displaying and recording inflation or deflation data when the syringe system is used to inflate or deflate the balloon of the catheter or other balloon-type member. A syringe having a barrel and a syringe plunger is selectively operable to increase fluid pressure applied to the balloon catheter or other balloon member by sliding the plunger further into the barrel. Positive pressure applied to the balloon catheter or member is released by withdrawing the syringe plunger towards the rear of the barrel. A piezoresistive semiconductor transducer placed in fluid communication with the fluid pressure applied by the syringe, senses the fluid pressure and outputs an electrical signal representative of that pressure. The electrical signal is received by a RF transmission module that is permanently mounted to the syringe barrel. The RF transmission module derives transmission data from the electrical pressure signal and wirelessly transmits the transmission data via a radio frequency signal to a remote console. The remote console processes the transmission data so as to monitor, record, and display the inflation or deflation data.

Claims

1. A system for monitoring the inflation or deflation of a balloon-type member and for selectively recording and displaying inflation or deflation data, the system comprising:

a syringe adapted for connection to the member through tubing, the syringe comprising a barrel and a plunger selectively operable to inflate the member by applying fluid pressure to the member through the tubing by sliding the plunger within the barrel, and operable to deflate the member by withdrawing the plunger from the barrel;

transducer means, adapted for placement in fluid communication with the fluid pressure applied to inflate or deflate said member, for sensing fluid pressure and outputting an electrical signal proportional to the sensed fluid pressure;

RF transmission means, mounted to said syringe and electrically connected to said transducer means, for receiving the electrical pressure signal and for wirelessly transmitting via a predetermined radio frequency transmission data that is derived from the electrical pressure signal;

remote console means, positioned a predetermined distance away from said RF transmission means, for wirelessly receiving said transmission data transmitted by said RF transmission means and for electronically processing said transmission data so as to derive and so as to display or record therefrom inflation or deflation data representing the magnitude of said fluid pressure applied to said member and the length of time said fluid pressure is applied to said member; and

display means, electrically connected to said remote console means, for outputting a visual display of the inflation or deflation data.

2. A system as defined in claim 1 further comprising a power means for providing electrical power to the transducer means and the RF transmission means.

3. A system as defined in claim 2 wherein the power means comprises a battery.

4. A system as defined in claim 2 wherein the transducer means and the power means are mounted to the syringe barrel.

5. A system as defined in claim 1 wherein the transducer means comprises a piezoresistive semiconductor transducer.

6. A system as defined claim 1 wherein the RF transmission means comprises:

means for amplifying and conditioning the electrical pressure signal;

means for converting the amplified electrical pressure signal from an analog to a digital form;

digital processor means for processing the digital form of the electrical pressure signal so as to derive therefrom transmission data;

data memory means for storing the transmission data derived by the digital processor means;

program memory means for storing machine-readable instructions utilized by the digital processor means to derive and store the transmission data for transmission; and

RF transmission circuit means for wirelessly transmitting the transmission data as an RF signal having a predetermined radio frequency.

7. A system as defined in claim 1 wherein the remote console means comprises:

RF receiver circuit means for receiving the transmission data transmitted by said RF transmission means;

second digital processor means for monitoring the received transmission data and for processing the received transmission data so as to derive, store and display inflation or deflation data which represents the magnitude of the applied pressure and the length of time the pressure is applied to the member;

second data memory means for storing the inflation or deflation data derived by the second digital processor means; and

second program memory means for storing machine-readable instructions utilized by the second digital processor means to monitor the received transmission data and to derive, store, retrieve and display the inflation or deflation data.

8. A system as defined claim 1 wherein the RF transmission means comprises a control panel, the control panel comprising:

first switch means for selecting a menu display for presentation at said display means a plurality of optionally selectable functions to be performed by said remote console means; and

second switch means for entering to said remote console means data identifying choices selected with respect to any of said plurality of functions.

9. A system as defined in claim 8 wherein the selected function is comprised of at least one of the following:

(1) retrieving and reviewing all previously stored inflation or deflation data;

(2) clearing all inflation or deflation data previously stored by said remote console means;

(3) setting a maximum positive inflation pressure value;

(4) setting a maximum inflation time value;

(5) selecting units of inflation pressure;

(6) initializing date and time; and

(7) priming data stored in said remote console means.

10. A system as defined in claim 8 wherein the first switch means comprises a first elastomeric button switch, and the second switch means comprises a second elastomeric button switch, and wherein the first and the second elastomeric button switches both comprise means for preventing entry of liquids into the RF transmission means at said button switches.

11. A system for monitoring the inflation or deflation of a balloon-type member and for selectively recording and displaying inflation or deflation data, the system comprising:

a syringe adapted for connection to the member through tubing, the syringe comprising a barrel and a plunger selectively operable to inflate the member by applying fluid pressure to the member through the tubing by sliding the plunger within the barrel, and operable to deflate the member by withdrawing the plunger from the barrel;

transducer means for sensing a fluid pressure and for outputting an electrical pressure signal proportional to the sensed fluid pressure, the transducer means being placed in fluid communication with the fluid pressure within the syringe and the tubing connected thereto;

RF transmission means, mounted to said syringe and electrically connected to said transducer means, for receiving the electrical pressure signal and for wirelessly transmitting via a predetermined radio frequency transmission data that is derived from the electrical pressure signal;

remote console means, positioned a predetermined distance away from said RF transmission means, for wirelessly receiving said transmission data transmitted by said RF transmission means and for electronically processing said transmission data so as to derive and so as to display or record therefrom inflation or deflation data representing the magnitude of said fluid pressure applied to said member and the length of time said fluid pressure is applied to said member;

display means, electrically connected to said remote console means, for outputting a visual display of the inflation or deflation data; and

a control panel disposed on the RF transmission means, the control panel comprising switch means for selectively controlling the remote console means to perform at least one of a plurality of optionally selectable functions.

12. A system as defined in claim 11 wherein the optionally selected function is comprised of at least one of the following:

(1) retrieving and reviewing all previously stored digital data;

(2) clearing all digital data previously stored by said remote console means;

(3) setting a maximum positive inflation pressure value;

(4) setting a maximum inflation time value;

(5) selecting units of inflation pressure;

(6) initializing date and time; and

(7) printing data stored in said remote console means.

13. A system as defined in claim 12 wherein the switch means comprises:

first switch means for selecting a menu display for presentation at said display means of the plurality of optionally selectable functions; and

second switch means for entering to said remote console means data identifying choices selected with to any of said plurality of optionally selectable functions.

14. A system as defined in claim 13 wherein the first switch means comprises a first elastomeric button switch, and the second switch means comprises a second elastomeric button switch, and wherein the first and the second elastomeric button switches both comprise means for preventing entry of liquids into the RF transmission means at said button switches.

15. A system as defined claim 14 wherein the transmission means comprises:

means for amplifying and conditioning the electrical pressure signal;

means for converting the amplified electrical pressure signal from an analog to a digital form;

digital processor means for processing the digital form of the electrical pressure signal so as to derive therefrom transmission data;

data memory means for storing the transmission data derived by the digital processor means;

program memory means for storing machine-readable instructions utilized by the digital processor means to derive and store the transmission data for transmission; and

RF transmission circuit means for wirelessly transmitting the transmission data as an RF signal having a predetermined radio frequency.

16. A system as defined in claim 15 wherein the remote console means comprises:

RF receiver circuit means for receiving the transmission data transmitted by said RF transmission circuit means;

second digital processor means for monitoring the received transmission data and for processing the received transmission data so as to derive, store and display inflation or deflation data which represents the magnitude of the applied pressure and the length of time the pressure is applied to the member;

second data memory means for storing the inflation or deflation data derived by the second digital processor means; and

second program memory means for storing machine-readable instructions utilized by the second digital processor means to monitor the received transmission data and to derive, store, retrieve and display the inflation or deflation data.

17. A system as defined in claim 16 further comprising a power means for providing electrical power to the transducer means and the RF transmission means.

18. A system as defined in claim 17 wherein the power means comprises a battery.

19. A system as defined in claim 18 wherein the transducer means comprises a piezoresistive semiconductor transducer.