AbstractRationaleThe use of endobronchial ultrasound‐guided transbronchial needle aspiration (EBUS‐TBNA) is currently recommended for staging non‐small cell lung cancer (NSCLC) in centrally located tumors, tumors >3 cm, or with radiologic evidence of lymph node (LN) metastasis. Current guidelines do not recommend staging EBUS‐TBNA in patients with stage I NSCLC who do not have any of the aforementioned conditions.ObjectiveWe hypothesize that using EBUS‐TBNA is useful for detecting occult metastasis in radiologic stage I NSCLC.MethodsIn this single‐center, retrospective study, charts of patients ≥18 years old who underwent staging EBUS‐TBNA from January 2005 to May 2019 were reviewed. Only patients with combined positron‐emission tomography and computed tomography (PET/CT) scans consistent with radiologic stage I NSCLC were included. Identified variables included: age, gender, personal history of any cancer, smoking history, tumor location, tumor centrality, tumor size, tumor PET activity, histopathologic type of NSCLC, and LN biopsy results. Patients whose LN samples showed a diagnosis other than NSCLC were excluded. The association between LN positivity, and each of the variables was assessed using Pearson's correlation for categorical variables, and logistic regression analysis for continuous variables.ResultsFrom the 2,892 initially screened patients, 188 were included. Of those, 13 (6.9%; 95% CI, 4%–11%) had a malignancy‐positive LN biopsy. The number needed to test (NNT) in order to detect one case of any occult metastasis was 15. Among the included variables, a significant association was found between LN positivity and tumor centrality, with central tumors found in 61.5% of patients with positive LN (n = 8) (p < 0.01). This association stayed significant after adjusting for age, gender, smoking history, tumor size, tumor location, and PET activity (p = 0.015). Among patients with malignancy‐positive LN biopsies, five (38.5%; 95% CI, 17.6%–64.6%) were upstaged to N1, and eight (61.5%; 95% CI, 35.4%–82.4%) were upstaged to N2, with NNT of 23 to detect one case of occult N2 metastasis. Subgroup analysis comparing LN‐positive patients based on their N stage did not show statistically significant association with any of the variables.ConclusionBased on our results and along with the existing evidence, EBUS‐TBNA should be recommended as part of the routine staging in all patients with radiologic stage I NSCLC.
436: A Rare Cause of Hypercapnic Respiratory Failure: Hypothyroid Myopathy
Evaluation of Epidemiological Factors to Determine If There Are Predictors of Lymphangiolieomyomatosis and Elevated Vascular Endothelial Growth Factor-D Levels Among Patients
Mortality remains high in septic shock with few new treatment options. Angiotensin II has been recently approved for use in septic shock due to promising results in the ATHOS-3 trial. However, patients with neutropenia were excluded in the trial. This patient population is becoming increasingly common in the intensive care unit as there is an increase in novel biologic therapies and stem cell transplantations for haematological and solid organ malignancies. We present a case of a patient with T-cell acute lymphoblastic leukaemia who received chemotherapy, resulting in neutropenia and septic shock. There was persistent hypotension despite initiating multiple conventional vasopressors. Angiotensin II was attempted with immediate improvement in the blood pressure which resulted in weaning of other vasopressors. This positive haemodynamic response suggests that angiotensin II can successfully be used in neutropenic patients without increasing the overall catecholamine burden of septic shock.
Psychosocial and Financial Burden of Therapy in USA Patients with Pulmonary Arterial Hypertension
Pulmonary arterial hypertension (PAH) is a devastating disease with significant morbidity and mortality. There are many psychosocial and financial implications of this disease; however, little is known how this affects the treatment of PAH patients. A questionnaire-based prospective cohort study was performed on 106 PAH patients from a Pulmonary Hypertension Center and the Pulmonary Hypertension Association national conference in 2018. The demographic, treatment, psychosocial, employment, financial impact on treatment data was obtained. The majority of patients had cardiopulmonary symptoms despite treatment. The symptoms affected their social and work lives, with about one in three applying for disability because of their PAH. The majority of PAH patients had insurance coverage, but still noted a significant financial burden of the disease, with nearly a half who needed financial assistance to pay for their PAH medications. Thirty (28.3%; 95% CI, 20.6–37.5%) patients mentioned they changed their medication regimen, with some skipping doses outright (28 [26.4%; 95% CI, 19–35.6%]) in order to save money. PAH continues to cause significant psychosocial and financial burden on patients despite advances in medications. This impact ranged from dissatisfaction with quality of life, to unemployment, to altering their medication regimen to save money.