Abstract
Introduction: Post-operative pulmonary complications (PPC) are a major cause of death after lung resection and responsible for delayed discharge and intensive care admissions (Agostini, et al 2008. Thorax , 63 , A10-A12). 2008). Early detection is fundamental to treatment. Aims: We hypothesised breathing motion measured by Structured Light Plethysmography (SLP) can detect early signs of PPC. Methods: 5 minutes of tidal breathing was measured, pre-surgery (PRE) and day 1 (D1) and day 2 (D2) post-surgery with SLP (Thora-3Di, PneumaCare Ltd) in 11 seated patients. 3 patients developed PPC (the PPC group, PPCG). 8 patients did not develop PPC (the control group, CG). % change in SLP parameters PRE to D1 were compared between PPCG and CG using a Student t-test. Results: PPC was diagnosed in all PPCG patients on D2. PPC scores were not diagnostic of PPC on D1. On D1 the % change in synchronization between rib cage and abdomen was higher in PPCG than CG. The % change of time to reach maximum inspiratory flow was also higher in PPCG Conclusion: SLP may provide clinically-useful respiratory indices to detect early signs of PPC before a PPC scoring system diagnosis can be made.
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