Quality of an ambulatory monitoring technique for diagnosing obstructive sleep apnea under conditions of limited resources
Objectives: To: 1) evaluate the quality of an ambulatory monitoring technique for diagnosing Obstructive Sleep Apnea Syndrome (OSAS) while patients move through the city; and 2) identify factors that lead to data loss. Methods: Clinical histories were reviewed and ambulatory portab...
Main Authors: | , , , |
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Format: | Article |
Language: | English |
Published: |
Thieme Revinter Publicações Ltda.
2018-12-01
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Series: | Sleep Science |
Subjects: | |
Online Access: | http://sleepscience.org.br/export-pdf/525/ssci-11-04-0269.pdf |
Summary: | Objectives: To: 1) evaluate the quality of an ambulatory monitoring technique for diagnosing
Obstructive Sleep Apnea Syndrome (OSAS) while patients move through the city; and 2) identify
factors that lead to data loss. Methods: Clinical histories were reviewed and ambulatory portable
monitorings of adults with high pretest probability for OSAS were included, the signals monitored
were pulse oximetry, heart rate, nasal pressure, snoring, chest band and body position. The
equipment was connected from 14:00-20:00 h and then patients moved through the city turning it
off and on at home. Results were analyzed visually to record all the minutes lost. A good-quality
study was defined as recording time 240 min and signal loss <20%. A cost/benefit analysis was
performed using Golpe et al.`s methodology. Results: A total of 70 recordings were analyzed.
Most subjects were obese men with severe OSAS. Signal quality was determined to be good with
a median signal loss of 4.9 min (0-405) that represented 1% (0-99) of total recording time. The
signal lost most often was pulse oximetry at 1.8 min (0-403, p=0.0001). Of the 70 studies performed,
57 (81%) met the definition of good quality, while 13 (19%) had to be repeated. Men lost the
pulse oximetry signal more often than women. This technique could represent savings of 65-75%.
Conclusions: Placing a portable OSAS monitor during the day while patients move around the
city turning it on and off at home does not affect the quality of the study results obtained and is a
cost-effective method. |
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ISSN: | 1984-0659 1984-0063 |