Methods and apparatus for monitoring the cardiovascular condition of patients with sleep disordered breathing

Patent metadata

Field	Value
Publication number	US-10610167-B2
Application number	US-201313967517-A
Country	US
Kind code	B2
Filing date	Aug 15, 2013
Priority date	Mar 31, 2004
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

An apparatus for assessing patient breathing and cardiovascular condition of a patient includes a storage medium for storing data regarding the breathing and cardiovascular condition of the patient, a processor in communication with the storage medium, the processor being configured to prompt the patient with a series of queries relating to patient breathing and cardiovascular condition, a display for presenting the patient with the series of queries and a date entry device for receiving responses to the series of queries. The processor is configured to tally positive responses to the series of queries to generate a sleep disordered breathing index.

First claim

The invention claimed is:

1. A system for monitoring sleep disordered breathing (SDB) related information, the system comprising:
a sensor for measuring SDB related information of a patient;
a sense tube for conveying the sleep disordered breathing related information from the patient to the sensor;
a display device for presenting the patient with an SDB questionnaire comprising a plurality of different questions;
an input device for receiving responses to the plurality of questions; and
one or more processors in communication with the sensor, the display device, and the input device, the one or more processors configured to:
identify a number of received responses indicative of SDB;
calculate an SDB index based on the number of received responses identified as being indicative of SDB;
generate a first warning message for display on the display device if the SDB index is greater than a first predetermined threshold; and
generate a second warning message for display on the display device if the SDB index is both less than the first predetermined threshold and greater than a second predetermined threshold.

2. The system of claim 1 , wherein the first warning message comprises a recommendation for a full SDB assessment.

3. The system of claim 2 , wherein the second warning message comprises an indication that a full SDB assessment is unnecessary.

4. The system of claim 1 , wherein the display device is further configured to display the calculated SDB index.

5. The system of claim 1 , wherein the sensor is configured to measure at least one of oxygen concentration, pressure, or flow in the sense tube.

6. The system of claim 1 , wherein the first and second warning messages comprise statistical data derived from the measured SDB related information.

7. The system of claim 6 , wherein the statistical data comprises an apnea hypopnea index (AHI) derived from the measured SDB related information.

8. The system of claim 7 , wherein the one or more processors are further configured to:
detect an apnea event if a moving average ventilation derived from the measured SDB related information drops below a predetermined average ventilation value for a predetermined time period; and
calculate the AHI based on a plurality of detected apnea events.

9. The system of claim 7 , wherein the one or more processors are further configured to:
detect a hypopnea event if a moving average ventilation derived from the measured SDB related information (a) drops below a first predetermined average ventilation value and (b) remains above a second predetermined average ventilation value for a predetermined time period; and
calculate the AHI based on a plurality of detected hypopnea events.

10. The system of claim 1 , wherein the one or more processors are further configured to:
detect at least one of central apneas, obstructive apneas, hypopneas, partial obstructions, or snoring from the measured SDB related information; and
generate a statistical summary for display on the display device based on the detected central apneas, obstructive apneas, hypopneas, partial obstructions, or snoring.

11. The system of claim 1 , wherein at least one question of the SDB questionnaire determines a gender, an age, a height, or a weight of the patient.

12. The system of claim 1 , wherein at least one question of the SDB questionnaire determines a presence of snoring.

13. The system of claim 1 , wherein at least one question of the SDB questionnaire determines a presence of excessive sleepiness.

14. The system of claim 1 , wherein at least one question of the SDB questionnaire determines a presence of breathlessness at nighttime.

15. The system of claim 1 , wherein at least one question of the SDB questionnaire determines a presence of cessation of breathing during sleep.

16. The system of claim 1 , wherein at least one question of the SDB questionnaire determines a subjective quality of sleep.

17. The system of claim 1 further comprising:
a blower for providing a respiratory therapy to the patient according to one or more treatment protocols.

18. The system of claim 1 , wherein the one or more processors are further configured to:
monitor changes in the measured SDB related information; and
adjust the treatment protocol of the blower based on the monitored changes in the measured SDB related information.

19. The system of claim 1 , wherein a single unit comprises the display device, the input device, and the one or more processors.

20. The system of claim 1 , wherein a remote device comprises the display device and the input device.

Assignees

• ResMed Pty Ltd

Inventors

• Farrell Michael
• Hebblewhite Malcolm Ronald
• Stewart Deirdre
• Tisthammer Ann
• Vance Maya
• Randolph Robin

Classifications

• A61M2230/04

  Heartbeat characteristics, e.g. ECG, blood pressure modulation · CPC title

• A61B5/4818

  Sleep apnoea · CPC title

• A61M16/0069

  the speed thereof being controlled by respiratory parameters, e.g. by inhalation · CPC title

• A61M16/0051

  with alarm devices · CPC title

• A61M2205/3592

  using telemetric means, e.g. radio or optical transmission · CPC title