The Development of Convenient RQ Measuring Device for Patients Real Time Monitoring

환자의 실시간 모니터링을 위한 간편한 RQ 측정기기의 개발

김유석

․ 전형민

․최성욱

․ 심은보

The Development of Convenient RQ Measuring Device for Patients Real Time Monitoring

YS Kim, HM Jeon, SW Choi, EB Shim

Key Words: RQ, Respiratory Quotient, oxygen and carbon dioxide

Abstract

RQ(Respiratory Quotient) value is obtained from the ratio of the consumed oxygen and the produced carbon dioxide during the patient's respiration. To investigate the efficacy of insulin and diagnosis the metabolic disorder in short time, the RQ value can be used as important parameter. The measurement of oxygen and carbon dioxide amounts is needed large chamber and complex sensors. But If the atmospheric oxygen and carbon dioxide concentrations do not change, the expiratory oxygen and carbon dioxide can be used to obtain RQ value. A convenient RQ measuring device has been developed by using two sensors for O2 and CO2. The estimation of RQ devices confirms that the RQ device can obtain accurate data by eliminating uncertain factor such as delay time and remaining gases.

1. 서 론

†김유석, 강원대학교 기계메카트로닉스공학과 대학원 E-mail : [email protected]

TEL : (033) 250-6595

* 강원대학교 기계메카트로닉스 공학부 대한기계학회 2008년도 추계학술대회 논문집

1609

2. 측정 알고리즘 및 구조

2.1. 호흡상과 대사활동

2.2 호흡상 측정 알고리즘

   







 

× 

 

× 



 

×  ^{ }

^{×   }



 



     × 

  × 



 

2.3. 호흡상 측정 기기의 구조

1610

3. 실험 및 결과

3.1 실험 방법

170cm 90kg

1 5 .

30 ,

. 1000mL chamber 1

, O

CO

module .

3.2

5case RQ RQ

0.9

. 30

.

Table 1. 3 RQ RQ

, Dead space

. 10

RQ

.

4. 결 론

. ,

.

.

, ,

.

chamber Dead space

.

1611

Acknowledgements

This Work was Supported by Korea Science &

Engineering Fourdation through the NRL Program ROA-2008-000-20127-0

참고문헌

(1) , and , 2004, “ ”,

, pp.142-180

(2) Peyton PJ, Robinson GJ., 2005, "Measured pulmonary oxygen consumption: difference between systemic oxygen uptake measured by the reverse Fick method and indirect calorimetry in cardiac surgery.", Anaesthesia, Vol. 60, pp. 146-150.

(3) John Hoppe, Andrew Huszcza, 2005, "Device and method for determinig respiratory quotient without measuring lung ventilation", US Patent application, US2005/0288602A1

(4) Shinichiro Saito, Kazuichi Tomonobu, Tadashi Hase, Ichiro Tokimitsu, "Effects of diacylglycerol on postprandial energy expenditure and respiratory quotient in healthy subjects", 2006, Nutrition 22, pp. 30-35

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