IP Library › Granted Patent US 9,579,050
Granted Patent B2
US 9,579,050 · App. 14/683,666 · Granted Feb 28, 2017

Physiological trend monitor

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 9,579,050
App. No.
14/683,666
Granted
Feb 28, 2017
Kind
B2
Abstract

A physiological trend monitor has a sensor signal responsive to multiple wavelengths of light transmitted into a tissue site. The transmitted light is detected after attenuation by pulsatile blood flow within the tissue site. A processor has an input responsive to the sensor signal and a physiological parameter output. Features are extracted from the physiological parameter output. Criteria are applied to the features. An alarm output is generated when the criteria are satisfied.

Claims (14)

1. A system for non-invasively monitoring physiological trends, the system comprising:

a processor configured to:

receive a sensor signal from an optical sensor coupled with a patient, the sensor signal responsive to light attenuated by body tissue of the patient;

calculate a physiological parameter and a physiological parameter trend based on the sensor signal;

output a value of the physiological parameter for presentation on a display; and

output an audible alarm once the physiological parameter reaches a threshold if the physiological parameter trend is not trending upward.

2. The system of claim 1 , wherein the processor is further configured to suppress the audible alarm once the smoothed physiological parameter rises above the threshold, even if the physiological parameter trend is flat or trending downward.

3. The system of claim 1 , wherein the processor is further configured to suppress the audible alarm once the physiological parameter trend begins to trend upward, even if the physiological parameter is under the threshold.

4. The system of claim 1 , wherein the processor is further configured to calculate the physiological parameter by smoothing physiological parameter values.

5. The system of claim 1 , wherein the processor is further configured to calculate the physiological parameter by integrating physiological parameter values.

6. The system of claim 1 , wherein the processor is further configured to calculate the physiological parameter trend using a curve-fitting technique.

7. The system of claim 1 , wherein the processor is further configured to output the audible alarm responsive to the physiological parameter trend being negative.

8. The system of claim 1 , wherein the processor is further configured to output the audible alarm responsive to the physiological parameter trend being zero.

9. The system of claim 1 , wherein the physiological parameter is selected from the group consisting of oxygen saturation, blood glucose, total hemoglobin concentration, blood pressure, pulse rate, and respiration rate.