Systems and methods for indicating an amount of use of a sensor

• US 6,861,639 B2
• Filed: 02/03/2003
• Issued: 03/01/2005
• Est. Priority Date: 08/26/1999
• Status: Expired due to Term

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Al-Ali, Ammar
• Primary Examiner(s): LE, QUE TAN
• Application Number:
  US10/357,531
• Publication Number:
  US 20030111592A1
• Time in Patent Office: 757 Days
• Field of Search: 250/214.1, 250/559.1
• US Class Current: 250/214.1
• CPC Class Codes: A61B 2560/0276 Determining malfunction
• CPC Class Codes: A61B 2560/028 Arrangements to prevent overuse, e.g. by counting the number of uses
• CPC Class Codes: A61B 2562/08 Sensors provided with means for identification, e.g. barcodes or memory chips
• CPC Class Codes: A61B 5/02427 Details of sensor
• CPC Class Codes: A61B 5/145 Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissuemeasuring of blood pressure or blood flow A61B5/02; non-radiation detecting or locating of foreign bodies in blood A61B5/06
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6838 Clamps or clips
• CPC Class Codes: G07C 3/00 Registering or indicating the condition or the working of machines or other apparatus, other than vehicles

Abstract

Aspects of the present invention include systems and methods for indicating an amount of use of a pulse oximetry sensor. According to one embodiment, the system includes an oximeter that monitors the amount of use for a given sensor. The oximeter and/or the sensor may advantageously include a visual alarm, an audio alarm, a vibrational alarm, a power down function, or the like, which can be activated when a predetermined amount of use has expired. According to another embodiment, the system includes a sensor having a memory device storing a unique identifier.

Claims

1. A noninvasive optical probe capable of indicating an amount of use in a determination of whether the noninvasive optical probe has expired from overuse, the noninvasive optical probe comprising:

one or more emitters capable of emitting light;

at least one conductor capable of communicating an emitter drive signal to the one or more emitters;

a memory device electrically connected to the at least one conductor and capable of monitoring an amount of use of the noninvasive optical probe; and

a detector capable of detecting the light after the light has been attenuated by body tissue, wherein attenuated light is indicative of one or more physiological parameters of the body tissue.

2. The noninvasive optical probe of claim 1, further comprising an expiration indicator capable of being activated when the amount exceeds a predetermined amount of use.

3. The noninvasive optical probe of claim 2, wherein the activating comprises activating at least one of an audio and visual alarm.

4. The noninvasive optical probe of claim 1, wherein the amount comprises a value representative of a number of pulses of the emitter drive signal received by the one or more emitters.

5. The noninvasive optical probe of claim 1, wherein the memory device comprises a timer.

6. The noninvasive optical probe of claim 5, wherein the amount comprises an amount of time.

7. The noninvasive optical probe of claim 1, wherein the noninvasive optical probe communicates the amount to a processing device.

8. The noninvasive optical probe of claim 7, wherein the processing device further comprises an expiration indicator capable of being activated when the amount exceeds a predetermined amount of use.

9. The noninvasive optical probe of claim 8, wherein the activating comprises activating at least one of an audio and visual alarm.

10. A method of determining an amount of use of an optical probe, the method comprising:

communicating with one or more emission devices of a noninvasive optical probe over at least one conductor to drive the one or more emission devices;

communicating with a timer of the noninvasive optical probe over the at least one conductor used to drive the one or more emission devices;

incrementing the timer during use of the noninvasive optical probe; and

when the timer is proximate to a predetermined amount, activating an indicator configured to illustrate that the use of the noninvasive optical probe is proximate the predetermined amount.

11. The method of claim 10, further comprising:

determining whether the noninvasive optical probe is new; and

when the noninvasive optical probe is new, resetting a timer.

12. The method of claim 11, wherein the determining comprises accessing a memory identifying whether the noninvasive optical probe has been used.

13. The method of claim 11, wherein the determining comprises accessing a memory identifying the noninvasive optical probe.