Method and apparatus for prevention of apnea

• US 8,517,981 B2
• Filed: 02/10/2010
• Issued: 08/27/2013
• Est. Priority Date: 02/12/2009
• Status: Active Grant

• Current Assignee: Oregon Health & Science University
• Original Assignee: Oregon Health & Science University
• Inventors: Zornow, Mark H.
• Primary Examiner(s): VU, QUYNH-NHU HOANG
• Application Number:
  US13/148,758
• Publication Number:
  US 20110313262A1
• Time in Patent Office: 1,294 Days
• Field of Search: 604/66, 128/200.24, 600/300, 600/323, 600/529, 702/19, 607/42, 607/62, 340/573.1
• US Class Current: 604/66
• 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 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/08 Detecting, measuring or recording devices for evaluating the respiratory organs A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/4818 Sleep apnoea
• CPC Class Codes: A61B 5/4839 combined with drug delivery
• CPC Class Codes: A61B 7/003 Detecting lung or respiration noise

Abstract

Embodiments provide a continuous monitor of a patient'"'"'s oxygenation and/or respiration coupled to a device configured to stimulate the patient'"'"'s respiratory drive and/or summon medical assistance. In embodiments, there are provided systems, devices, and methods to assist in preventing patients from overdosing themselves with narcotics post-surgery. In embodiments, an apnea prevention device (APD) may utilize a commercially available pulse oximeter and/or a respiratory monitor to continuously monitor a patient'"'"'s level of oxygenation/respiration. Should a patient develop respiratory depression or apnea and begin to desaturate, an APD may, using a proprietary method, trigger a sequence of staged responses to reverse worsening hypoxia.

Claims

1. A method, comprising:

monitoring by an apparatus an individual'"'"'s oxygen saturation and/or respiration, wherein the apparatus comprises a pulse oximeter and/or respiratory monitor coupled to at least one stimulus delivery device;

delivering by the at least one stimulus delivery device a first stimulus to the individual if the individual'"'"'s oxygen saturation and/or respiration falls within a first predefined range and is sustained within the first predefined range for a first predefined duration;

delivering by the at least one stimulus delivery device a second stimulus to the individual if the individual'"'"'s oxygen saturation and/or respiration falls within a second predefined range and is sustained within the second predefined range for a second predefined duration, wherein the second predefined range is indicative of more severe hypoxia or respiration than the first predefined range;

delivering by the at least one stimulus delivery device a third stimulus to the individual if the second stimulus fails to increase the individual'"'"'s oxygen saturation and/or respiration to a level above the second predefined range; and

wherein the first stimulus comprises one or more audible stimuli, the second stimulus comprises one or more tactile stimuli, and wherein the third stimulus comprises the administration of one or more doses of a narcotic antagonist.

2. The method of claim 1, further comprising introducing by the apparatus a required lock-out period after each intervention during which no further intervention is provided.

3. The method of claim 1, further comprising notifying by the apparatus a medical professional of a status of the individual.

4. The method of claim 1, further comprising monitoring by the apparatus the individual'"'"'s rate of fall of oxygen saturation, number of breaths per minute, and or heart rate.

5. The method of claim 1, further comprising recording by the apparatus a time-stamped, electronic log of physiologic data of the individual and any delivered stimulus or intervention.

6. The method of claim 1, wherein the first predefined duration is approximately 10 seconds.

7. The method of claim 1, wherein the first predefined range comprises an oxygen saturation of 85-90%.

8. The method of claim 7, wherein the second predefined range comprises an oxygen saturation of below 85%.

9. The method of claim 1, further comprising continuously monitoring the individual'"'"'s oxygen saturation and/or respiration to determine if the individual'"'"'s oxygen saturation and/or respiration is within the first or second predefined range.