Sliding Away From Using POCUS: Diagnosing Pneumothorax Following Endobronchial Valve Placement.

To the Editor: Bronchoscopic lung volume reduction (BLVR) through placement of endobronchial valves (EBVs) has expanded the range of treatments available to patients with severe emphysema and hyperinflation and is now part of the standard of care.1 EBV placement has a high incidence of postprocedural pneumothorax, which may warrant urgent or emergent chest tube placement at the bedside. A new loss of lung sliding on point-of-care ultrasound (POCUS), particularly when seen alongside a lung point, can ordinarily be used by clinicians to quickly diagnose pneumothorax at the bedside. We present a case that demonstrates the limitation of this approach in BLVR cases.