HYPERSATURATION INDEX

• US 20130274571A1
• Filed: 04/17/2013
• Published: 10/17/2013
• Est. Priority Date: 04/17/2012
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Diab, Mohamed K., Sampath, Anand, Al-Ali, Ammar, Iyengar, Prashanth
• Granted Patent: US 9,131,881 B2
• Time in Patent Office: Days
• US Class Current: 600/324
• CPC Class Codes: A61B 2562/0238 Optical sensor arrangements for performing transmission measurements on body tissue
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/7282 Event detection, e.g. detecting unique waveforms indicative of a medical condition A61B5/4094, A61B5/4818, A61B5/349, A61B5/0823 take precedence
• CPC Class Codes: A61B 5/7405 using sound
• CPC Class Codes: A61B 5/743 Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots
• CPC Class Codes: A61B 5/746 Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms alarms per se G08B
• CPC Class Codes: A61M 2230/205 partial oxygen pressure (P-O2)

Abstract

Embodiments of the present disclosure provide a hypersaturation index for measuring a patient'"'"'s absorption of oxygen in the blood stream after a patient has reached 100% oxygen saturation. This hypersaturation index provides an indication of the partial pressure of oxygen of a patient. In an embodiment of the present invention, a hypersaturation index is calculated based on the absorption ratio of two different wavelengths of energy at a measuring site. In an embodiment of the invention, a maximum hypersaturation index threshold is determined such that an alarm is triggered when the hypersaturation index reaches or exceeds the threshold. In another embodiment, an alarm is triggered when the hypersaturation index reaches or falls below its starting point when it was first calculated.

Claims

1. A method of measuring a patient'"'"'s rising oxygen saturation levels during a treatment using a pulse oximeter device, the method comprising:

determining an indication of an oxygen saturation level;

calculating a separate indication of rising oxygen levels after the determined indication of oxygen saturation level exceeds a 100% measurement;

displaying the indication of rising oxygen levels.

2. The method of claim 1, wherein the indication of rising oxygen saturation is a hypersaturation index.

3. The method of claim 2, wherein the hypersaturation index is an indication of the partial pressure of oxygen.

4. The method of claim 2, wherein the displaying of the indication of rising oxygen levels comprises displaying a graph of an oxygen hypersaturation index.

5. The method of claim 1, wherein the displaying of the indication of rising oxygen levels comprises generating an alarm in response to the indication of rising oxygen levels being above or below a certain threshold.

6. A method for alerting a caregiver of a patient'"'"'s oxygen saturation level during a treatment using a pulse oximeter device, the method comprising:

determining the patient'"'"'s oxygen saturation level;

calculating and storing a base hypersaturation index value based on the oxygen saturation level;

monitoring the patient'"'"'s hypersaturation index value;

comparing a later determined hypersaturation index value with the stored base hypersaturation index value; and

generating an alarm trigger when the hypersaturation index value is equal to or less than the base hypersaturation index value.

7. The method of claim 6, the method further comprising:

calculating and storing a maximum hypersaturation index value;

comparing the hypersaturation index value with the stored maximum hypersaturation index value;

generating an alarm trigger when the hypersaturation index value is equal to or greater than the maximum hypersaturation index value.

8. The method of claim 6, wherein the activated alarm is an auditory alarm.

9. The method of claim 6, wherein the activated alarm is a visual alarm.

10. A method of measuring a patient'"'"'s rising oxygen saturation levels during a treatment using a pulse oximeter device, the method comprising:

measuring a level of hypersaturation of a patient;

determining an amount of time for the patient to return from a hypersaturation state;

displaying the indication of time.

11. The method of claim 10, wherein the time includes a range of times.

12. The method of claim 10, further comprising determining an inflection point in measured ratio values indicating that the patient is no longer receiving oxygen.

13. The method of claim 10, wherein a baseline saturation is initially determined before that patient is hypersaturated with oxygen.

14. A timer display, the display comprising:

a semi-circle display; and

an area indicating a range of potential time remaining values, wherein the area decreases as the time remaining decreases indicating a higher certainty of time remaining.