• Arq Neuropsiquiatr · Nov 2014

    Analysis of mean transcutaneous capnography in consecutive patients undergoing polysomnography.

    • Giulio Cesare Pinnola and Patrícia Souza Bastos.
    • Hospital Sarah, Brasília, DF, Brazil.
    • Arq Neuropsiquiatr. 2014 Nov 1; 72 (11): 841-4.

    UnlabelledTranscutaneous capnography is a noninvasive method useful for analysis of the behavioral tendency of transcutaneous CO₂pressure (PtcCO₂) in patients undergoing polysomnography, to evaluate respiratory sleep disorders.ObjectiveDetermine normative PtcCO₂values in normal patients undergoing polysomnography.MethodOne hundred seventy-nine patients who underwent polysomnography with simultaneous PtcCO₂measurement were assessed by means of a transcutaneous capnograph (TCM4 series from Radiomiter).ResultsThe group classified as normal (N=53) presented a apnea/hypopnea index (AHI) <5 events/per hour of sleep and their age groups varied between 7 and 76 years of age.ConclusionGlobal mean values of PtcCO₂in the normal group had a Gaussian distribution that varied between 33.1 and 50.0 mmHg (SD 4,363). Such findings allowed the establishment of normative PtcCO₂values for normal individuals.

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