KETEPATAN PEMERIKSAAN RADIOLOGI DAN BTA APUSAN LANGSUNG DENGAN KULTUR DALAM DIAGNOSIS TUBERKULOSIS PARU DI MEDAN

Abstract

Lung tuberculosis is one of transmitted diseases which are caused by Mycobacterium tuberculosis through
nuclei droplet. Diagnosis for lung tuberculosis is usually detected by the examination of direct sputum
removal, thorax photo, and Culture. The type of the research was descriptive study by using diagnostic test
and the samples consisted of sputum and thorax photo. The sputum was taken accidentally, in the morning,
and accidentally which was examined by using Ziehl Nelsen method and culture. The objective of the
research was to find out the effectiveness of examining direct BTA removal and radiology which were
compared with Culture. The samples were taken from Private Practice of Tuberculosis Specialists in Medan
and in BP4, Medan which had fulfilled inclusive criteria, radiology examination and three times of phlegm
taking for direct BTA removal and culture were performed; after that, radiology diagnostic test for direct
BTA removal was compared with Culture. 60 samples on direct removal method indicated the value of
sensitivity of 59.38%, specificity of 92.86%, value of positive prediction of 90.48%, value of negative
prediction of 66.7%, ratio of positive likelihood of 8.31, and ratio of negative likelihood of 0.44. Radiology
method indicated sensitivity of 62.63%, specificity of 82.14%, the value of positive prediction of 80.77%,
value of negative prediction of 67.65%, ratio of positive likelihood of 3.67, and ratio of negative likelihood of
0.42. Of the 21 samples, positive BTA which underwent minimum lung damage of 4 (6.7%), moderate
damage of 9 (15.0%), and wide damage of 5 (8.3%). The result of the research showed that radiology
examination indicated that the value of sensitivity was higher than direct removal method, compared with
culture as gold standard in BTA examination.That clinical benefit was bigger in direct removal method can
be seen from the value of positive prediction which was higher than radiology method so that it is
recommended that both examination techniques be used to diagnose lung tuberculosis