Method and device for apnea and hypopnea detection
First Claim
1. A computer-implemented method, automatically implemented by one or more processors of a computing system, for detecting apneas and hypopneas from a digitized breath sound recording acquired from a candidate suspected of sleep apnea, the method comprising:
- scanning by at least one processor an amplitude profile of said digitized breath sound recording to identify a prospect event segment;
evaluating by at least one processor characteristics of said prospect event segment for consistency with one or more preset apnea-specific criteria;
classifying by at least one processor said prospect event segment as representative of an apnea upon it satisfying each of said one or more apnea-specific criteria;
evaluating by at least one processor the characteristics of said prospect event for consistency with one or more preset hypopnea-specific criteria distinct from said apnea-specific criteria;
classifying by at least one processor said prospect event segment as representative of a hypopnea upon it satisfying each of said one or more hypopnea-specific criteria; and
outputting indication of a candidate'"'"'s condition as a function of each said classified apnea and hypopnea;
wherein said prospect event is characterized by a falling edge and a rising edge temporally separated by a low-amplitude segment;
wherein said one or more apnea-specific criteria comprise a minimum apnea event amplitude depth threshold; and
wherein said one or more hypopnea-specific criteria comprisea distinct minimum hypopnea event amplitude depth threshold shallower than said minimum apnea event amplitude depth threshold, and wherein said distinct hypopnea event amplitude depth threshold comprises both a minimum pre-apneic depth threshold and a distinct post-apneic depth threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed herein is a method and device for apnea and hypopnea detection. In one embodiment, a method is provided for detecting apneas and hypopneas from a digitized breath sound recording acquired from a candidate suspected of sleep apnea. The method comprises scanning an amplitude profile of the digitized breath sound recording to identify a prospect event segment; evaluating characteristics of the prospect event segment for consistency with one or more preset apnea-specific criteria; classifying the prospect event segment as representative of an apnea upon it satisfying each of the one or more apnea-specific criteria; evaluating the prospect event characteristics for consistency with one or more preset hypopnea-specific criteria distinct from the apnea-specific criteria; and classifying the prospect event segment as representative of a hypopnea upon it satisfying each of the one or more hypopnea-specific criteria.
32 Citations
22 Claims
-
1. A computer-implemented method, automatically implemented by one or more processors of a computing system, for detecting apneas and hypopneas from a digitized breath sound recording acquired from a candidate suspected of sleep apnea, the method comprising:
-
scanning by at least one processor an amplitude profile of said digitized breath sound recording to identify a prospect event segment; evaluating by at least one processor characteristics of said prospect event segment for consistency with one or more preset apnea-specific criteria; classifying by at least one processor said prospect event segment as representative of an apnea upon it satisfying each of said one or more apnea-specific criteria; evaluating by at least one processor the characteristics of said prospect event for consistency with one or more preset hypopnea-specific criteria distinct from said apnea-specific criteria; classifying by at least one processor said prospect event segment as representative of a hypopnea upon it satisfying each of said one or more hypopnea-specific criteria; and outputting indication of a candidate'"'"'s condition as a function of each said classified apnea and hypopnea; wherein said prospect event is characterized by a falling edge and a rising edge temporally separated by a low-amplitude segment; wherein said one or more apnea-specific criteria comprise a minimum apnea event amplitude depth threshold; and wherein said one or more hypopnea-specific criteria comprise a distinct minimum hypopnea event amplitude depth threshold shallower than said minimum apnea event amplitude depth threshold, and wherein said distinct hypopnea event amplitude depth threshold comprises both a minimum pre-apneic depth threshold and a distinct post-apneic depth threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A non-transitory computer-readable medium comprising statements and instructions stored thereon for implementation by one or more processors of a computing system to detect apneas and hypopneas from a digitized breath sound recording acquired from a candidate suspected of sleep apnea that cause the computer system to perform the following operations:
-
scan by at least one processor an amplitude profile of said digitized breath sound recording to identify a prospect event segment; evaluate by at least one processor characteristics of said prospect event segment for consistency with one or more preset apnea-specific criteria; classify by at least one processor said prospect event segment as representative of an apnea upon it satisfying each of said one or more apnea-specific criteria; evaluate by at least one processor the characteristics of said prospect event for consistency with one or more preset hypopnea-specific criteria distinct from said apnea-specific criteria; classify by at least one processor said prospect event segment as representative of a hypopnea upon it satisfying each of said one or more hypopnea-specific criteria; and output indication of a candidate'"'"'s condition as a function of each said classified apnea and hypopnea; wherein said prospect event is characterized by a falling edge and a rising edge temporally separated by a low-amplitude segment; wherein said one or more apnea-specific criteria comprise a minimum apnea event amplitude depth threshold; and wherein said one or more hypopnea-specific criteria comprise a distinct minimum hypopnea event amplitude depth threshold shallower than said minimum apnea amplitude depth threshold, and wherein said distinct hypopnea event amplitude depth threshold comprises both a minimum pre-apneic depth threshold and a distinct post-apneic depth threshold. - View Dependent Claims (16, 17, 18)
-
-
13. A system for detecting apneas and hypopneas from a digitized breath sound recording acquired from a candidate suspected of sleep apnea, the system comprising:
-
one or more processors; memory storing instructions, the instructions comprising instructions that, when executed by the one or more processors, cause the processors to; scan by at least one processor an amplitude profile of said digitized breath sound recording to identify a prospect event segment; evaluate by at least one processor characteristics of said prospect event segment for consistency with one or more preset apnea-specific criteria; classify by at least one processor said prospect event segment as representative of an apnea upon it satisfying each of said one or more apnea-specific criteria; evaluate by at least one processor the characteristics of said prospect event for consistency with one or more preset hypopnea-specific criteria distinct from said apnea-specific criteria; classify by at least one processor said prospect event segment as representative of a hypopnea upon it satisfying each of said one or more hypopnea-specific criteria; and output indication of a candidate'"'"'s condition as a function of each said classified apnea and hypopnea, wherein said prospect event is characterized by a falling edge and a rising edge temporally separated by a low-amplitude segment; wherein said one or more apnea-specific criteria comprise a minimum apnea event amplitude depth threshold; and wherein said one or more hypopnea-specific criteria comprise a distinct minimum hypopnea event amplitude depth threshold shallower than said minimum apnea amplitude depth threshold, and wherein said distinct hypopnea event amplitude depth threshold comprises both a minimum pre-apneic depth threshold and a distinct post-apneic depth threshold. - View Dependent Claims (14, 15, 19)
-
-
20. A computer-implemented method, automatically implemented by one or more processors of a computing system, for detecting apneas and hypopneas from a digitized breath sound recording acquired from a candidate suspected of sleep apnea, the method comprising:
-
scanning by at least one processor an amplitude profile of said digitized breath sound recording to identify a prospect event segment; evaluating by at least one processor characteristics of said prospect event segment for consistency with one or more preset apnea-specific criteria; classifying by at least one processor said prospect event segment as representative of an apnea upon it satisfying each of said one or more apnea-specific criteria; evaluating by at least one processor the characteristics of said prospect event for consistency with one or more preset hypopnea-specific criteria distinct from said apnea-specific criteria; classifying by at least one processor said prospect event segment as representative of a hypopnea upon it satisfying each of said one or more hypopnea-specific criteria; and outputting indication of a candidate'"'"'s condition as a function of each said classified apnea and hypopnea; wherein said prospect event is characterized by a falling edge and a rising edge temporally separated by a low-amplitude segment; wherein said one or more apnea-specific criteria comprise a minimum apnea event amplitude depth threshold; wherein said one or more hypopnea-specific criteria comprise a distinct minimum hypopnea event amplitude depth threshold shallower than said minimum apnea event amplitude depth threshold; and wherein said scanning step comprises scanning said amplitude profile for segments satisfying a minimum prospect event depth threshold, said minimum prospect event depth threshold at least as shallow as said minimum hypopnea event amplitude depth threshold.
-
-
21. A system for detecting apneas and hypopneas from a digitized breath sound recording acquired from a candidate suspected of sleep apnea, the system comprising:
-
one or more processors; memory storing instructions, the instructions comprising instructions that, when executed by the one or more processors, cause the processors to; scan by at least one processor an amplitude profile of said digitized breath sound recording to identify a prospect event segment; evaluate by at least one processor characteristics of said prospect event segment for consistency with one or more preset apnea-specific criteria; classify by at least one processor said prospect event segment as representative of an apnea upon it satisfying each of said one or more apnea-specific criteria; evaluate by at least one processor the characteristics of said prospect event for consistency with one or more preset hypopnea-specific criteria distinct from said apnea-specific criteria; classify by at least one processor said prospect event segment as representative of a hypopnea upon it satisfying each of said one or more hypopnea-specific criteria; and output indication of a candidate'"'"'s condition as a function of each said classified apnea and hypopnea; wherein said prospect event is characterized by a falling edge and a rising edge temporally separated by a low-amplitude segment; wherein said one or more apnea-specific criteria comprise a minimum apnea event amplitude depth threshold; wherein said one or more hypopnea-specific criteria comprise a distinct minimum hypopnea event amplitude depth threshold shallower than said minimum apnea amplitude depth threshold; and wherein said scanning step comprises scanning said amplitude profile for segments satisfying a minimum prospect event depth threshold, said minimum prospect event depth threshold at least as shallow as said minimum hypopnea event amplitude depth threshold.
-
-
22. A non-transitory computer-readable medium comprising statements and instructions stored thereon for implementation by one or more processors of a computing system to detect apneas and hypopneas from a digitized breath sound recording acquired from a candidate suspected of sleep apnea that cause the computer system to perform the following operations:
-
scan by at least one processor an amplitude profile of said digitized breath sound recording to identify a prospect event segment; evaluate by at least one processor characteristics of said prospect event segment for consistency with one or more preset apnea-specific criteria; classify by at least one processor said prospect event segment as representative of an apnea upon it satisfying each of said one or more apnea-specific criteria; evaluate by at least one processor the characteristics of said prospect event for consistency with one or more preset hypopnea-specific criteria distinct from said apnea-specific criteria; classify by at least one processor said prospect event segment as representative of a hypopnea upon it satisfying each of said one or more hypopnea-specific criteria; and output indication of a candidate'"'"'s condition as a function of each said classified apnea and hypopnea; wherein said prospect event is characterized by a falling edge and a rising edge temporally separated by a low-amplitude segment; wherein said one or more apnea-specific criteria comprise a minimum apnea event amplitude depth threshold; wherein said one or more hypopnea-specific criteria comprise a distinct minimum hypopnea event amplitude depth threshold shallower than said minimum apnea amplitude depth threshold; and wherein said scanning step comprises scanning said amplitude profile for segments satisfying a minimum prospect event depth threshold, said minimum prospect event depth threshold at least as shallow as said minimum hypopnea event amplitude depth threshold.
-
Specification