Measures to Prevent Air Embolism in Transthoracic Biopsy of the Lung

OBJECTIVE. Systemic air embolism(AE) is a rare but feared complication of transthoracic biopsywith potentially fatal consequences. The aim of the study was to assess the effect of patient positioning during transthoracic biopsyon preventing systemic AE. MATERIALS AND METHODS. We compared a historical control group of 610 patients (group 1) who underwent transthoracic biopsybefore the implementation of measures to prevent systemic AE during transthoracic biopsyand a group of 1268 patients (group 2) who underwent biopsyafter the measures were implemented. The patients in group 2 were placed in the ipsilateral-dependent position so that the lesion being biopsiedwas located below the level of the left atrium. RESULTS. The rate of systemic AE was reduced from 3.77% to 0.16% (odds ratio [OR], 0.040; 95% CI, 0.010–0.177; p < 0.001). Logistic regression analyses identified needle penetration depth, prone positionof the patient during biopsy, location above the level of the left atrium, needle path through...