Epidemiology, practice of ventilation and outcome for patients at increased risk of postoperative pulmonary complications

Figures

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  Fig. 1. Flow chart: Data collection and selection of centres and patients. Two centres used the optional randomisation program to reduce the number of patients: one centre reduced the patient numbers by 50% (excluding 75 patients) and another centre by 75% (excluding 307 patients). ARISCAT, Assess Respiratory Risk in Surgical Patients in Catalonia; IRB, institutional review board.

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  Fig. 2. Ventilation parameters in patients at increased vs. patients at low risk of PPCs. (a) Cumulative frequency distribution of tidal volume; (b) cumulative frequency distribution of positive end-expiratory pressure; (c) cumulative distribution of peak pressure; (d) cumulative distribution of driving pressure. PBW, predicted body weight; PEEP, positive end-expiratory pressure; PPC, postoperative pulmonary complications; VT, tidal volume.

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  Fig. 3. Scatterplots showing distribution of (a) tidal volume with positive end-expiratory pressure combinations; (b) tidal volume with peak pressure; (c) tidal volume with driving pressure; (d) tidal volume with respiratory rate in patients at increased vs. patients at low risk of PPCs. bpm, breaths per minute; PBW, predicted body weight; PEEP, positive end-expiratory pressure; PPC, postoperative pulmonary complications; VT, tidal volume.

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  Fig. 4. Outcome in patients at increased vs. patients at low risk of PPCs. (a) Probability of development of PPCs; (b) probability of hospital discharge; and (c) probability of in-hospital mortality. PPC, postoperative pulmonary complications.

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  Fig. 5. Outcome in patients at low, moderate, and high risk of PPCs: (a) probability of development of PPCs; (b) probability of hospital discharge; and (c) probability of in-hospital mortality. PPC, postoperative pulmonary complications.