Infectious Disease

The primary aims of this study is to determine the efficacy and tolerability of Extracorporeal Photopheresis (ECP) for the treatment of either Refractory Bronchiolitis Obliterans Syndrome (BOS) patients (258 at cessation of enrollment April 7, 2022) or Newly Diagnosed (22 as of enrollment Hold February 2022) Bronchiolitis Obliterans Syndrome patients after lung transplantation. In compliance with the Centers for Medicare and Medicaid Services' (CMS) Coverage with Evidence Development (CED) decision, the study will collect specified demographic, comorbidity, treatment, and outcome data exclusively for Medicare beneficiaries who are treated with ECP for either refractory or New BOS.

This study will use dual energy x-ray computed tomography (DECT) to evaluate the relationship between heterogeneous perfusion, hypoxia (low oxygen in inspired gas) and induction of pulmonary vascular dilatation to characterize emphysema susceptibility in a normal smoking population. The investigators will correlate DECT measures of perfusion with lung injury measured by single photon emission computed tomography (SPECT). The investigators will study the effect of pulmonary arterial vasodilation to see if it eliminates indices of persistent lung injury in smokers that are susceptible to emphysema

The purpose of this study is to compare the outcomes of two different treatment options commonly used to manage periprosthetic joint infection (PJI), an infection around the artificial knee or hip.