[Diagnostic study of pulmonary mass under ultrasonography guided aspiration biopsy by four types of needle].

One hundred and thirty patients with pulmonary mass were studied under ultrasonography guided aspiration biopsy by four types of needle. The cytological positive cases were 57.1% in fine needle (22G), 79.6% in large needle (18G), 90.9% in canaliculated needle (18G) and 80.9% in cutting needle (14G), and the pathological positive cases were 0, 64.4%, 86.3% and 92.8% respectively. These data showed that the positive rate of fine needle puncture was the lowest one. Based on the pathological finding, canaliculated and cutting needle seem to be better than large one and it is the best choice to perform the pulmonary aspiration biopsy.