Ultrasound-Guided Interscalene Catheter Complicated by Persistent Phrenic Nerve Palsy

Table 1

Pulmonary function tests pre- and postoperatively.

	Preoperative			Postoperative
	Pred	Actual	% Pred	Pred	Actual	% Pred
Forced vital capacity (FVC; L)
Forced expiratory volume 1 (FEV1; L)
% FEV1/FVC	73.0%	64.3%		72.0%	61.0%
Mid-expiratory flow (FEF25–75; L/sec)
Peak flow (PF; L/sec)