Abnormal Rv Tlc Ratio

Fifty two and fifty seven percent of the patients had abnormal residual volume and abnormal rv tlc ratio respectively.

Abnormal rv tlc ratio. Adjustment of predicted value downward reduces the sensitivity of the test for detecting abnormality. 8 racial adjustment of predicted value most studies for normal values in us looked at caucasian populations of normals not apppp p g propriate for other ethnic groups if used in african american population more likely to seem abnormal 12 higher controversial. Abnormal rv tlc ratio was a superior criterion for diagnosing obstruction in asthma. A positive correlation was observed between rv to age r 0 4 and height r 0 3.

Then taking the ratio of observed and predicted intro duces an age related bias an undesirable feature. Abnormal rv tlc ratio was a superior criterion for diagnosing obstruction in asthma. Aalternative ccriteria oof nnormality. Furthermore there was no correlation between fev1 reversibility and rv reversibility r 0 1 p 0 3 conclusions.

Furthermore a recent study has reported abnormal rv tlc ratios even in presence of normal fev1 fvc ratios in patient with mild to moderate persistent asthma. Agreement and bias normal abnormal kappa bias p value plethysmography actual 40 40 79 5 yes 0 0006.