고농도 산소가 지적장애인의 혈중 산소 포화도와 심박동률 및 단기 기억에 미치는 영향
Effects of Highly Concentrated Oxygen on Working memory and Physiological Signals of Intellectual and Developmental Disability People
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초록
본 연구에서는 92%의 고농도 산소 공급이 지적장애인의 단기기억력(0-back 과제 수행 능력)과 생체 신호에 미치는 영향을 관찰하였다. 지적 장애 진단(평균 2.1±0.5급)을 받은 남자 7명(평균 28.9±1.8세)과 여자 7명(평균 34.4±8.3세) 총 14명을 대상으로 실험을 수행하였다. 실험은 고농도 산소 공급 전 Rest 구간(2분), 고농도 산소 공급 후 적응 구간인 Adaptation 구간(1분), 과제 수행 전 안정 상태를 유지하는 Control 구간(2분), 0-back 과제를 수행하는 Task 구간(2분)으로 구성되었다. 모든 실험 참여자는 21%와 92% 고농도 산소의 두 가지 산소 농도에서 과제를 수행하였고, 전 구간에서 혈중 산소 포화도와 심박동률을 측정하였다. 일반 공기중의 산소 농도인 21%에 비해 92%의 고농도 산소 공급 시 정답률은 증가하였으며, 혈중 산소 포화도는 증가하였고, 심박동률은 감소하는 경향이 나타났다.
Abstract
This study investigated changes in working memory (0-back task performance), blood oxygen saturation (SpO2 [%]), and heart rate (HR [bpm]) of intellectual and developmental disability people by supplying two different condition of oxygen (21%, and 92%). 7 males (average 28.9±1.8 years) and 7 females (average 34.4±8.3 years) in intellectual and developmental disability people were selected as the subjects for this study. The each run consisted of four phases, i.e., Rest (2 min.), Adaptation (1 min.), Control (2 min.), and Task (2 min.). SpO₂ and HR were measured during each phase. The analysis of cognitive performance with 92% oxygen administration when compared to 21% oxygen revealed that the accuracy rate increased. When supplied 92% oxygen, the blood oxygen saturation was increased while the heart rate was decreased compared to those under 21% oxygen condition. This result supports the hypothesis that hyperoxic air increase oxygen saturation level in the blood, lead to more available oxygen to the brain, thus increase the ability of cognitive processing of intellectual and developmental disability people.
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