Safety and Efficacy of Navigational Bronchoscopy with Archimedes Virtual Bronchoscopic Platform in Patients with Advanced Pulmonary Disease

Background: Patients with advanced lung disease who present with suspicious pulmonary nodules (SPNs) undergoing transthoracic needle aspiration pose a diagnostic challenge given risk for complications. Virtual bronchoscopic navigation (VBN) is an alternative means to biopsy patients. Study Design: The study was a retrospective chart review of all patients who underwent VBN with the Archimedes platform. Demographic information, radiographic evidence of parenchymal lung disease and pulmonary function testing were gathered. Peri-procedure complications and clinical data on biopsy results were gathered to assist in determining both adequate tissue sample (defined if adequate specimen was obtained as per pathology/cytology report) and diagnostic yield (defined as if after further testing/CT imaging from 1 year post-procedure the diagnosis did not change). Univariate analysis was performed to determine the impact of clinical factors on diagnostic yield. Results: Ninety-six patients with 110 nodules underwent VBN. Eight-eight patients (92%) had radiographic emphysema with 56% having moderate to severe. Fourteen patients (17%) had radiographic ILD. Adequate tissue sample at time of VBN was 93%. Overall diagnostic yield in 80 patients (excluding 16 patients who were initially benign/non-diagnostic that were lost to follow-up) was 72%. Overall complication rate was 7% with 1-pneumothorax (1%), 3-significant bleeding and 3-hospitalized for respiratory failure. Conclusion: In our cohort of patients the diagnostic yield and complication rate were comparable to other studies where there were fewer patients with advanced lung disease. This data suggests that VBN-guided bronchoscopic biopsy of SPNs is a viable diagnostic option with an acceptable safety profile.