Monitoring system including mask removal and oxygen desaturation period detection

1. A method of approximating a position of an oxygen mask during a procedure, the method comprising:

detecting a presence of the oxygen mask based on a signal from a sensor or through an observation through an optical imaging device;

determining, via the sensor or the optical imaging device, whether the oxygen mask is close to or on a patient for supplying oxygen to the patient;

detecting, via the sensor or the optical imaging device, a removal of the oxygen mask from the patient to stop supplying oxygen to the patient;

initiating, via one or more processors, a desaturation timer in response to the sensor or the optical imaging device detecting the removal of the oxygen mask from the patient;

operating, via the one or more processors, an image display device to display a parameter for the oxygen desaturation timer.

2. The method according to claim 1 , wherein the sensor is a proximity sensor.

3. The method according to claim 2 , further comprising:

detecting a first distance between the proximity sensor and the oxygen mask;

comparing whether the first distance is less than or equal to a first distance threshold to determine whether the oxygen mask is on the patient.

4. The method according to claim 3 , further comprising:

detecting whether the oxygen mask is stationary when the oxygen mask is on the patient; and

resetting the oxygen desaturation timer when the oxygen mask is stationary.

5. The method according to claim 3 , further comprising:

setting, via the one or more processors, a second distance threshold to avoid initiating the oxygen desaturation timer where the oxygen mask has been slightly adjusted and not fully removed from the patient; and

initiating, via the one or more processors, the oxygen desaturation timer when the first distance is greater than the second distance threshold.

6. The method according to claim 3 , further comprising:

determining, where the oxygen mask has moved from the patient, whether the oxygen mask has been slightly adjusted or fully removed from the patient by comparing the oxygen mask distance to the second threshold distance; and

initiating, via the one or more processors, the oxygen desaturation timer when the oxygen mask distance is greater than the second distance threshold.

7. The method according to claim 6 , further comprising:

determining if the mask has been put back on the patient and is stationary by comparing a signal from the proximity sensor and the second distance threshold; and

resetting the oxygen desaturation timer when the oxygen mask has been put back on the patient.

8. The method according to claim 1 , wherein detecting the removal of the oxygen mask from the patient comprises determining a reduction in pressure in an oxygen supply line to the oxygen mask via a pressure sensor that registers the reduction in pressure in the oxygen supply line when the oxygen mask is removed from the patient.

9. The method according to claim 1 , further comprising:

comparing, via the one or more processors, the oxygen desaturation time to an oxygen desaturation maximum time corresponding to an elapsed time since the mask was removed from the patient, where the parameter for the oxygen desaturation timer is displayed first and most often based on a respective priority when the oxygen desaturation time is greater than the oxygen desaturation maximum time.

10. The method according to claim 9 , further comprising changing data display settings and the priority of the oxygen desaturation timer parameter when the oxygen desaturation timer is greater than or equal to the oxygen desaturation maximum time.

11. The method according to claim 1 , where the parameter for the oxygen desaturation timer changes from a numeral or time value to a text value, or to a numeral or time value and a text value.

12. The method according to claim 1 , wherein the desaturation timer is implemented in a standalone image display device.

13. The method according to claim 1 , wherein the image display device wirelessly receives a desaturation time for displaying.

14. The method according to claim 1 , wherein the desaturation timer is integrated with an anesthesia machine.