EFFECTIVE BREATH HOLDING TIME IN THE MEASUREMENT OF THE PULMONARY DIFFUSING CAPACITY BY SINGLE BREATH METHOD
نویسندگان
چکیده
منابع مشابه
Effective breath holding time in the measurement of the pulmonary diffusing capacity by single breath method.
prolonged, this treatment leads to a considerable error in the DL value. In order to eliminate this error a correction factor of the inspiration time was newly introduced to obtain the effective inspiration time. The correction factor was a function of the ratio of the residual capacity to the total alveolar gas volume and the ratio of DL to the flow rate of inspiration. A nomogram was made for...
متن کاملAn analysis of factors affecting the measurement of pulmonary diffusing capacity by the single breath method.
The diffusing capacity of the lungs (DL) is defined as the rate of a gas transferred, divided by the difference in the mean partial pressure of that gas across the alveolar-capillary "membrane." Direct determination of the diffusing capacity for oxygen (DLo2) has been limited by technical difficulties and by the problematical calculation of the mean oxygen pressure on the capillary side of the ...
متن کاملMeasurement variability in single-breath diffusing capacity of the lung.
STUDY OBJECTIVES The single-breath diffusing capacity of the lung (DLCO) is a commonly performed pulmonary function test. The current American Thoracic Society (ATS) recommendations for reproducibility of DLCO measurements suggest that two measurements for the DLCO agree within 10% or 3 mL/min/mm Hg of the average value. The European Respiratory Society (ERS) recommends that two measurements sh...
متن کاملAttachment for automated single breath diffusing capacity measurement.
The single breath CO dBusing capacity has proved valuable for screening, particularly in situations in which altered mechanics of breathing do not rdect the degree of pulmonary impairment. Although simple in concept, the method has proved technically difficult both for patients and operators. Also, results are modified by tbe vdumes of breathhdding, of wash-out and of sampling and by the manner...
متن کاملA simultaneous single breath measurement of pulmonary diffusing capacity with nitric oxide and carbon monoxide.
Pulmonary diffusing capacity (DL) for carbon monoxide (CO) and nitric oxide (NO) were simultaneously measured in man using the single breath method, by adding 4O ppm of NO to the inspired gas and analysing the expirate for NO by a chemiluminescent method. The mean ratio of DLNO to DLCO in thirteen subjects was 4.3 (SD 0.3), mean DLNO = 49 mmol.min-1.kPa-1 (SD 10) and mean DLCO = 11 mmol.min-1.k...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Japanese Journal of Physiology
سال: 1971
ISSN: 1881-1396,0021-521X
DOI: 10.2170/jjphysiol.21.241