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Whole‐body impedance recording – a practical method for the diagnosis of sleep apnoea
Author(s) -
Saarelainen Seppo,
Himanen SariLeena,
Hasan Joel,
Virkkala Jussi,
Kööbi Tiit
Publication year - 2003
Publication title -
clinical physiology and functional imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.608
H-Index - 67
eISSN - 1475-097X
pISSN - 1475-0961
DOI - 10.1046/j.1475-097x.2003.00480.x
Subject(s) - medicine , polysomnography , impedance cardiography , sleep (system call) , anesthesia , cardiology , hemodynamics , apnea , heart rate , blood pressure , computer science , stroke volume , operating system
Summary The aim of this study was to evaluate the utility of whole‐body impedance cardiography (ICG WB ) in sleep studies, particularly in sleep apnoea detection. A comparison between simultaneous whole night ICG WB and standard polysomnographic recordings were made in 14 patients with a clinical suspicion of obstructive sleep apnoea, a mean age of 46 years (range 30–63 years) and a mean BMI of 29 kg m −2 (25–47). Obstructive apnoeas, central apnoeas and hypopnoeas all caused characteristic patterns in the ICG WB tracing. For an apnoea–hypopnoea index (AHI) > 15 events h −1 , the sensitivity of ICG WB was 89% and the specificity 80%. In conclusion, ICG WB signal includes valuable physiological information that can be effectively used for the detection of sleep apnoea episodes. The method seems promising in cases where the multichannel polysomnography is not applicable or when ICG WB is used for haemodynamic monitoring in seriously ill and postoperative patients.