학술논문
한국 어린이 및 청소년의 폐환기능에 관한 연구 - 특히 표준치 예측 수식에 관하여 -
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- 영문명
- Studies on the Ventilatory Functions of the Korean Children and Adolescents, with Special References to Prediction Formulas
- 발행기관
- 대한생리학회
- 저자명
- 박해근(Park, Hae-Kun) 김광진(Kim, Kwang-Jin)
- 간행물 정보
- 『대한생리학회지』제9권 제2호, 7~16쪽, 전체 10쪽
- 주제분류
- 의약학 > 의학일반
- 파일형태
- 발행일자
- 1975.12.31
4,000원
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국문 초록
영문 초록
The maximum breathing capacity (MBC) and the maximum mid-expiratory flow rate (MMF) are widely used in evaluation of the ventilatory function, among various parameters of pulmonary function. The MBC volume is the amount of gas which can be exchanged per unit time during maximal voluntary hyperventilation. Performance of this test, unlike that of single breath maneuvers, is affected by the integrity of the respiratory bellows as a whole including such factors are respiratory muscle blood supply, fatigue, and progressive trapping of air. Because of this, the MBC and its relation to ventilatory requirement correlates more closely with subjective dyspnea than does any other test. The MMF is the average flow rate during expiration of the middle 50% of the vital capacity. The MMF is a measurement of a fast vital capacity related to the time required for the maneuver and the MMF relates much better to other dynamic tests of ventilatory function and to dyspnea than total vital capacity, because the MMF reflects the effective volume, or gas per unit of time. Therefore, it is important to have a prediction formula with one can compute the normal value for the subject and the compare with the measured value. However, the formulas for prediction of both MBC and MMF of the Korean children and adolescents are not yet available in the present. Hence, present investigation was attempt to derive the formulas for prediction of both MBC and MMF of the Korean children and adolescents. MBC and MMF were measured in 1,037 healthy Korean children and adolescents (1,035 male and 1,002 female) whose ages ranged from 8 to 18 years. A spirometer (9L, Collins) was used for the measurement of MBC and MMF. Both MBC and MMF were measured 3times in a standing position and the highest values were used. For measurement, the CO2 absorber and sadd valve were removed from the spirometer in order to reduce the resistance in the breathing circuit and the subject was asked to breathe as fast and deeply as possible for 12 seconds in MBC and to exhale completely as fast as possible after maximum inspiration for MMF. During the measurement, investigator stood by the subject to give a constant encouragement. All the measured values were subsequently converted to values at BTPS. The formulas for MBC and MMF were derived by a manner similar to those for Baldwin et al (1949) and Im (1965) as function of age and BSA or age and height. The prediction formulas for MBC (L/min, BTPS) and MMF (L/min, BTPS) of the Korean children and adolescents as derived in this investigation are as follows: For male, MBC=[41.70+{2.69 X Age(years)}] X BSA (m2) MBC=[0.083+{0.045 X Age(years)}] X Ht (cm) For female, MBC=[45.53+{1.55 X Age(years)}] X BSA (m2) MBC=[0.189+{0.029 X Age(years)}] X Ht (cm) For male, MMF= [0.544+{0.066 X Age(years)}] X Ht (cm) For female, MMF=[0.416+{0.064 X Age(years)}] X Ht (cm)
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