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Yıl:2015; Cilt: 2; Sayı: 3>> Özet
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Türk Uyku Tıbbı Dergisi; 2015;2(3):53-58
Obstrüktif Uyku Apne ve Uykuyla İlişkili Hipoksemi-Hipoventilasyon Sendromlu Hastalarda Arteriyel Kan Parsiyel CO2 Basıncı ile Transkutanöz CO2 İzleminin Karşılaştırması
AC Beyan, AK Çırak, Y Varol, ZZ Uçar
Dr. Suat Seren Göğüs Hastalıkları Hastanesi, İzmir
Amaç: Uyku laboratuvarlarında kapnograf ile CO2 monitörizasyon kullanımıyla ilgili az sayıda çalışma vardır. Bu çalışmada Obstrüktif uyku apnesi sendromu (OSAS) ve Uykuyla ilişkili hipoksemi-hipoventilasyon sendromu (UHHS) tanılı hasta grubunda transkutanöz yol ile ölçülen tcCO2 değerinin kan gazı ile ölçülen PaCO2 değerleri ile korelasyonunu araştırmayı hedefledik. Gereç ve Yöntem: Polisomnografi (PSG) ile OSAS ve UHHS tanısı alan ve bilevel pozitif hava yolu basıncı (BiPAP) tedavi endikasyonu olan hastalar prospektif olarak çalışmaya alındı. Hastalardan PSG öncesi, sonrası ve manuel BiPAP titrasyonu öncesi ve sonrası toplam 4 kez arteriyel kan gazı örneği alındı ve hastaların PaCO2 düzeylerine bakıldı, eşzamanlı olarak tcCO2 monitörizasyonu ile CO2 ölçümü yapıldı. Bulgular: Çalışmaya 18’i OSAS ve KOAH, 12’si OSAS ve Obezite hipoventilasyon sendromu (OHS) tanılı toplam 30 uykuyla ilişkili solunum bozukluğu hastası (UİSB) dahil edildi. PSG gecesi ortalama tcCO2 düzeyi ile ortalama PaCO2 düzeyi arasında korelasyon saptandı (r=0,600; p<0,0001) (Şekil 1). Benzer şekilde BiPAP titrasyonu gecesi ölçümlerinde de ortalama tcCO2 ve ortalama PaCO2 değerleri arasında korelasyon saptantı (r=0,812; p=0,001). Her iki gecedeki toplam dört kan gazından elde edilen ortalama PaCO2 ve toplam iki kapnogramdan elde edilen ortalama tcCO2 değerleri arasında da korelasyon saptanmıştır (r=0,783; p<0,001). Sonuç: Çalışmamızda tcCO2 ile PaCO2 değerleri karşılaştırılması sonucu; kapnograf ile ölçülen ortalama CO2 değerlerinin BiPAP titrasyonu öncesi ve sonrasında alınan simultane arteryal pCO2 değerleri ortalaması ile korelasyon gösterdiğini tespit edildi.
Comparison of Partial Pressure of Carbon Dioxide in Arterial Blood and Transcutaneous Carbon DioxideMonitorizaiton in Patients with Obstructive Sleep Apneaand Sleep Related Hypoventilation/Hypoxemia Syndromes
Objective: There is limited number of studies conducted on the use of capnography for CO2 monitorization in sleep laboratories. In this study, it was aimed to investigate the correlation between the CO2 value measured by transcutaneous carbon dioxide (tcCO2) monitorization and partial pressure of carbon dioxide (PaCO2) levels measured with arterial blood gas analysis in patients diagnosed with obstructive sleep apnea syndrome (OSAS) and Sleep-related hypoventilation/hypoxemic syndromes (SRHHS). Materials and Methods: Patients with bilevel positive airway pressure (BiPAP) treatment indication who were diagnosed with OSAS and SRHHS via polysomnography (PSG), were prospectively included in the study. Four arterial blood gas analyses were conducted from all participants (preand post-PSG, before and after manual bi-level positive airway pressure titration) in order to find PaCO2 levels against tcCO2 monitorization. Results: Totally 30 patients with sleep-related respiratory disease (SRRD), consisting of 18 patients with OSAS and COPD, and 12 patients with OSAS and obesity hypoventilation syndrome (OHS), were included in the study. A correlation was detected between average tcCO2 level and average PaCO2 level in night PSG (r=0.600; p<0.0001). Similarly, we found a correlation between average tcCO2 level and average PaCO2 level in BiPAP titration night measurements as well (r=0.812; p=0.001). Finally, a correlation was detected between the average PaCO2 value obtained from four blood gas samples measured in both nights and the average tcCO2 value taken from two capnographies (r=0.783; p<0.001). Conclusion: Comparing tcCO2 and PaCO2 values, it was determined that the average CO2 values measured by capnography correlated with the average of simultaneous arterial CO2 values measured before and after BiPAP titration.

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