Devices for diagnosing sleep apnea or other conditions and related systems and methods

• US 8,784,329 B2
• Filed: 06/23/2011
• Issued: 07/22/2014
• Est. Priority Date: 11/15/2010
• Status: Active Grant

• Current Assignee: Louis J. Wilson
• Original Assignee: Louis J. Wilson
• Inventors: Wilson, Louis J.
• Primary Examiner(s): Natnithithadha, Navin
• Application Number:
  US13/167,165
• Publication Number:
  US 20120123286A1
• Time in Patent Office: 1,125 Days
• Field of Search: 600529-543
• US Class Current: 600/529
• CPC Class Codes: A61B 2562/0204 Acoustic sensors
• CPC Class Codes: A61B 5/08 Detecting, measuring or recording devices for evaluating the respiratory organs A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/0803 Recording apparatus specially adapted therefor
• CPC Class Codes: A61B 5/0826 Detecting or evaluating apnoea events A61B5/4818 takes precedence
• CPC Class Codes: A61B 5/087 Measuring breath flow
• CPC Class Codes: A61B 5/091 Measuring volume of inspired or expired gases, e.g. to determine lung capacity
• CPC Class Codes: A61B 5/4818 Sleep apnoea
• CPC Class Codes: A61B 5/6847 mounted on an invasive device
• CPC Class Codes: A61B 5/6852 Catheters
• CPC Class Codes: A61B 5/687 Oesophagus
• CPC Class Codes: A61B 5/7275 Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor
• CPC Class Codes: A61B 5/7278 Artificial waveform generation or derivation, e.g. synthesising signals from measured signals A61B5/327 takes precedence
• CPC Class Codes: A61B 7/003 Detecting lung or respiration noise
• CPC Class Codes: A61B 8/12 in body cavities or body tracts, e.g. by using catheters catheters per se A61M25/00
• CPC Class Codes: A61M 16/0003 Accessories therefor, e.g. sensors, vibrators, negative pressure
• CPC Class Codes: A61M 16/04 Tracheal tubes catheters in general A61M25/00

Abstract

A system includes a sensor device having a body configured to be inserted into an airway of a patient and one or more sensors mounted in or on the body. The one or more sensors are configured to collect sensor data associated with the airway of the patient. The system also includes a signal analyzer configured to analyze the sensor data. The one or more sensors could include one or more microphones. The signal analyzer could identify volume and/or pitch characteristics of the sensor data, perform pattern recognition to identify one or more patterns using the volume and/or pitch characteristics, and use the one or more patterns to identify a type, a location, and/or a degree of airway obstruction. This could be done, for instance, to determine if the patient suffers from obstructive sleep apnea or other condition that affects his or her airway.

Claims

1. An apparatus comprising:

a body configured to be inserted into an airway of a patient; and

multiple sensors mounted in or on the body, the sensors comprising multiple vibrational or acoustic sensors spaced apart along at least part of a length of the body and configured to collect vibrational or acoustic data associated with the airway of the patient at multiple locations along the airway of the patient;

wherein the sensors in or on the body are configured to be inserted through a mouth or nose of the patient into an esophagus of the patient in order to position the sensors in the airway of the patient.

2. The apparatus of claim 1, wherein the apparatus comprises a sensor array containing the sensors.

3. The apparatus of claim 1, wherein the vibrational or acoustic sensors comprise microphones.

4. The apparatus of claim 1, wherein the body comprises a catheter having first and second channels, the first channel configured to receive a stylet, the second channel comprising one or more wires coupled to the sensors.

5. The apparatus of claim 1, wherein the body comprises at least one marking that identifies a desired insertion distance.

6. The apparatus of claim 1, wherein the sensors further comprise one or more additional sensors configured to measure at least one of:

respiratory effort, blood oxygen level, heart rate, airway temperature variations, and airway pressure.

7. A system comprising:

a sensor device comprising;

a body configured to be inserted into an airway of a patient; and

multiple sensors mounted in or on the body, the sensors comprising multiple vibrational or acoustic sensors spaced apart along at least part of a length of the body and configured to collect vibrational or acoustic data associated with the airway of the patient at multiple locations along the airway of the patient;

wherein the sensors in or on the body are configured to be inserted through a mouth or nose of the patient into an esophagus of the patient in order to position the sensors in the airway of the patient; and

a signal analyzer configured to analyze sensor data including the vibrational or acoustic data.

8. The system of claim 7, wherein the signal analyzer is configured to analyze the sensor data by identifying at least one of:

volume characteristics and pitch characteristics of the sensor data.

9. The system of claim 8, wherein the signal analyzer is configured to analyze the sensor data by performing pattern recognition to identify one or more patterns using at least one of the volume characteristics and the pitch characteristics of the sensor data.

10. The system of claim 9, wherein the signal analyzer is configured to analyze the sensor data by using the one or more patterns to identify at least one of:

a type, a location, and a degree of airway obstruction.

11. The system of claim 7, wherein the sensor device comprises a sensor array containing the sensors.

12. The system of claim 7, wherein the vibrational or acoustic sensors comprise microphones.

13. The system of claim 7, wherein the body comprises a catheter having first and second channels, the first channel configured to receive a stylet, the second channel comprising one or more wires coupled to the sensors.

14. The system of claim 7, wherein the body comprises at least one marking that identifies a desired insertion distance.

15. A non-transitory computer readable medium embodying a computer program, the computer program comprising computer readable program code for:

receiving sensor data comprising vibrational or acoustic data from multiple sensors, the sensors comprising multiple vibrational or acoustic sensors spaced apart along at least part of a length of a sensor device that is configured to be inserted into an airway of a patient, the sensors configured to be inserted through a mouth or nose of the patient into an esophagus of the patient in order to position the sensors in the airway of the patient, the vibrational or acoustic data associated with the airway of the patient at multiple locations along the airway of the patient; and

analyzing the sensor data to determine if the patient suffers from a specified condition affecting the airway of the patient.

16. The computer readable medium of claim 15, wherein the computer readable program code for analyzing the sensor data comprises computer readable program code for analyzing the sensor data to determine if the patient suffers from obstructive sleep apnea.

17. The computer readable medium of claim 15, wherein the computer readable program code for analyzing the sensor data comprises computer readable program code for identifying at least one of:

volume characteristics and pitch characteristics of the sensor data.

18. The computer readable medium of claim 17, wherein the computer readable program code for analyzing the sensor data comprises computer readable program code for performing pattern recognition to identify one or more patterns using at least one of the volume characteristics and the pitch characteristics of the sensor data.

19. The computer readable medium of claim 18, wherein the computer readable program code for analyzing the sensor data comprises computer readable program code for using the one or more patterns to identify at least one of:

a type, a location, and a degree of airway obstruction.

20. The computer readable medium of claim 15, wherein the computer readable program code for receiving the sensor data comprises computer readable program code for receiving the sensor data from the multiple sensors in sequence along the sensor device.

21. A method comprising:

placing a patient under sedation;

inserting a sensor device into an airway of the patient, the sensor device comprising multiple sensors, the sensors comprising multiple vibrational or acoustic sensors spaced apart along at least part of a length of the sensor′

device, the sensors inserted through a mouth or nose of the patient into an esophagus of the patient in order to position the sensors in the airway of the patient;

collecting sensor data, including vibrational or acoustic data associated with the patient using the sensor device; and

analyzing, using at least one processing unit, the sensor data to determine if the patient suffers from a specified condition affecting the airway of the patient.