Reusable medical device with usage memory, system using same

• US 5,425,375 A
• Filed: 09/09/1993
• Issued: 06/20/1995
• Est. Priority Date: 09/09/1993
• Status: Expired due to Fees

• Current Assignee: Cardiac Pathways Corp. (Boston Scientific Corporation)
• Original Assignee: Cardiac Pathways Corp. (Boston Scientific Corporation)
• Inventors: Imran, Mir A., Chin, Donald
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): NASSER, ROBERT L
• Application Number:
  US08/119,973
• Time in Patent Office: 649 Days
• Field of Search: 128/672, 128/673, 128/675, 128/713, 128/692, 128/662.03, 128/662.09, 374/142, 374/208, 374/104, 374/141, 374/151, 374/163, 374/184, 364/557
• US Class Current: 600/549
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 2017/00084 Temperature
• CPC Class Codes: A61B 2017/00119 alarm; indicating an abnormal situation
• CPC Class Codes: A61B 2017/00725 Calibration or performance testing
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2018/00178 Electrical connectors
• CPC Class Codes: A61B 2018/00988 Means for storing information, e.g. calibration constants, or for preventing excessive use, e.g. usage, service life counter
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable
• CPC Class Codes: A61N 1/40 Applying electric fields by inductive or capacitive coupling microwave apparatus A61N5/00; Applying radio-frequency signals
• CPC Class Codes: G16H 40/63 for local operation

Abstract

A reusable medical device for performing an operation on a body. The device includes a flexible elongate member having proximal and distal extremities. The distal extremity is adapted to be inserted into the body for performing the operation therein and the proximal extremity is adapted to be disposed outside the body. At least one sensor for sensing a parameter relating to each use of the medical device and generating an electrical signal with respect to each use is provided. At least one memory device is carried by the proximal extremity for recording information relating to the use of the medical device to aid in determining whether the medical device is within warranty. A method is provided for determining usage of the medical device and includes the steps of sensing a parameter relating to each use of the medical device, noting the time at which use of the device is sensed and recording information relating to the use on the memory device to aid in determining whether the medical device is within warranty.

Claims

1. A reusable medical device for performing a medical procedure in a lumen in a body comprising a flexible elongate member having proximal and distal extremities, the distal extremity being adapted to be inserted into the lumen in the body for performing the procedure, the flexible elongate member having a length so that the proximal extremity is disposed outside the body when the distal extremity is in the body, at least one temperature sensor carried by the flexible elongate member for sensing a predetermined temperature relating to use of the medical device and generating an electrical signal, means secured to the proximal extremity including a microprocessor for receiving the electrical signal and recording information relating to use each time the temperature sensor reaches the predetermined temperature, means for recording in the microprocessor a maximum usage number and output means coupled to the microprocessor for providing an output when the maximum usage number has been exceeded.

2. A device as in claim 1 together with battery means carried by said proximal extremity which serves as a power supply for said microprocessor.

3. A device as in claim 1 wherein said temperature sensor is carried by said distal extremity for detecting a predetermined temperature above ambient temperature which corresponds to a temperature at the temperature sensor when the distal extremity is disposed in the lumen in the body.

4. A device as in claim 1 wherein said temperature sensor is carried by said proximal extremity for detecting a predetermined temperature above ambient temperature which corresponds to a temperature at the temperature sensor during sterilization of the medical device.

5. A system comprising a medical device for performing a medical procedure in a lumen in a body and means for monitoring usage cycle history of the medical device, the medical device including a flexible elongate member having proximal and distal extremities, the distal extremity of the medical device being adapted to be inserted into the lumen in the body for performing the procedure, the flexible elongate member having a length so that the proximal extremity is disposed outside the body when the distal extremity is in the body, a temperature sensor carried by the flexible elongate member and electrically coupled to the means for monitoring for sending a first electrical signal to the means for monitoring, lead means extending from the proximal extremity to the distal extremity for carrying electrical energy from the proximal extremity to the distal extremity, an electrical sensor carried by the flexible elongate member for detecting electrical energy passing through the lead means, the electrical sensor being electrically coupled to the means for monitoring for sending a second electrical signal to the means for monitoring, and at least one recording means disposed on the proximal extremity and electrically coupled to the means for monitoring, the means for monitoring receiving the electrical signals and recording information on the recording means each time the temperature sensor reaches a predetermined temperature above ambient temperature and each time electrical energy passes through the lead means, the recording means having output means for permitting access to the usage cycle history of the medical device.

6. A system as in claim 5 wherein said recording means includes an electrical erasable programmable read-only memory.

7. A system as in claim 5 wherein said means for monitoring is carried by said proximal extremity and wherein said system further includes battery means carried by the proximal extremity and electrically coupled to the means for monitoring for serving as a power supply thereto.

8. A system as in claim 5 wherein the temperature sensor is carried by the distal extremity for detecting a predetermined temperature above ambient temperature which corresponds to a temperature at the temperature sensor when the distal extremity is disposed in the lumen in the body.

9. A system as in claim 8 together with an additional temperature sensor carried by the proximal extremity and generating an additional electrical signal, the means for monitoring receiving the additional electrical signal and recording information on the recording means each time the additional temperature sensor reaches a predetermined temperature above ambient temperature which corresponds to a temperature at the additional temperature sensor during sterilization of the medical device.

10. A system as in claim 5 wherein said temperature sensor is carried by the proximal extremity for detecting a predetermined temperature above ambient temperature which corresponds to a temperature at the temperature sensor during sterilization of the medical device.

11. A reusable medical device for performing a medical procedure in a lumen in a body comprising a flexible elongate member having proximal and distal extremities, the distal extremity being adapted to be inserted into the lumen in the body for performing the procedure, the flexible elongate member having a length so that the proximal extremity is disposed outside the body when the distal extremity is in the body, a first temperature sensor carried by the proximal extremity and generating a first electrical signal and a second temperature sensor carried by the distal extremity and generating a second electrical sensor, lead means extending from the proximal extremity to the distal extremity for carrying electrical energy from the proximal extremity to the distal extremity, an electrical sensor carried by the flexible elongate member for detecting electrical energy passing through the lead means and generating a third electrical signal, means secured to the proximal extremity including a microprocessor for receiving the electrical signals and recording a usage history which includes each time the first temperature sensor reaches a first predetermined temperature above ambient temperature which corresponds to a temperature at the first temperature sensor during sterilization of the medical device, each time the second temperature sensor reaches a second predetermined temperature above ambient temperature which corresponds to a temperature at the second temperature sensor when the distal extremity is disposed in the lumen in the body and each time the third electrical signal is received from the electrical sensor, the microprocessor having output means for permitting access to the usage history of the medical device.

12. A device as in claim 11 together with battery means carried by said proximal extremity which serves as a power supply for the microprocessor.