title: Use of a portable monitoring device (Somnocheck Micro) for the investigation and diagnosis of obstructive sleep apnoea in comparison with polysomnography.
abstract: OBJECTIVE
  Polysomnography (PSG) remains the gold standard for the diagnosis of obstructive sleep apnoea syndrome (OSAS). While PSG is essential for OSAS, this technique is not suitable for epidemiological investigation due to its high cost. This study aimed to compare a portable monitoring device with PSG for the measurement of parameters related to the diagnosis of OSAS in rural areas.
  
  
  METHODS
  We conducted a descriptive study of 155 patients (30 women and 125 men; mean age, 52±12years) who visited to the Hendek Government Hospital Sleep Laboratory between February 2011 and January 2013 Apnoea hypopnea index (AHI), mean levels of O2 (meanO2), desaturation index (DI), and minimum oxygen saturation (minO2) variations as measured using both PSG and a portable Somnocheck Micro (SM) device were compared.
  
  
  RESULTS
  Differences were found between the meanO2 and DI, but not between AHI and minO2. Differences between the methods were not desired, but the relationship between the methods was distinct and supported our hypothesis.
  
  
  CONCLUSIONS
  The results of our study have shown that the SM portable device can be used as an alternative diagnostic tool in this population either at home or in sleep clinic.
authors.affiliation: Dr. Cahit Bilgin, MD. Department of Chest Diseases, Sakarya University Medical School, Sakarya, Turkey.
authors.forename: Cahit
authors.initials: C
authors.lastname: Bilgin
authors.affiliation: Dr. Unal Erkorkmaz, PhD. Department of Biostatistics, Sakarya University Medical School, Sakarya, Turkey.
authors.forename: Unal
authors.initials: U
authors.lastname: Erkorkmaz
authors.affiliation: Eng. Muhammed Kursad Ucar, Department of Electrical Electronics Engineering, Sakarya University, Sakarya, Turkey.
authors.forename: Muhammed Kursad
authors.initials: MK
authors.lastname: Ucar
authors.affiliation: Dr. Nese Akin, MD. Bursa Prof. Dr. Turkan Akyol Goverment Hospital of Chest Diseases, Bursa, Turkey.
authors.forename: Nese
authors.initials: N
authors.lastname: Akin
authors.affiliation: Dr. Ahmet Nalbant, MD. Sakarya Training and Research Hospital of Internal Medicine, Sakarya, Turkey.
authors.forename: Ahmet
authors.initials: A
authors.lastname: Nalbant
authors.affiliation: Prof. Ali Nihat Annakkaya, MD. Department of Chest Diseases, Duzce University Medical School, Duzce, Turkey.
authors.forename: Ali Nihat
authors.initials: AN
authors.lastname: Annakkaya
keywords: Obstructive sleep apnoea syndrome; Pulse wave analysis; photoplethysmography; polysomnography; portable sleep device