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Predicting risk of postoperative lung injury in high-risk surgical patients: a multicenter cohort study.

ABSTRACT: Acute respiratory distress syndrome (ARDS) remains a serious postoperative complication. Although ARDS prevention is a priority, the inability to identify patients at risk for ARDS remains a barrier to progress. The authors tested and refined the previously reported surgical lung injury prediction (SLIP) model in a multicenter cohort of at-risk surgical patients.This is a secondary analysis of a multicenter, prospective cohort investigation evaluating high-risk patients undergoing surgery. Preoperative ARDS risk factors and risk modifiers were evaluated for inclusion in a parsimonious risk-prediction model. Multiple imputation and domain analysis were used to facilitate development of a refined model, designated SLIP-2. Area under the receiver operating characteristic curve and the Hosmer-Lemeshow goodness-of-fit test were used to assess model performance.Among 1,562 at-risk patients, ARDS developed in 117 (7.5%). Nine independent predictors of ARDS were identified: sepsis, high-risk aortic vascular surgery, high-risk cardiac surgery, emergency surgery, cirrhosis, admission location other than home, increased respiratory rate (20 to 29 and ?30 breaths/min), FIO2 greater than 35%, and SpO2 less than 95%. The original SLIP score performed poorly in this heterogeneous cohort with baseline risk factors for ARDS (area under the receiver operating characteristic curve [95% CI], 0.56 [0.50 to 0.62]). In contrast, SLIP-2 score performed well (area under the receiver operating characteristic curve [95% CI], 0.84 [0.81 to 0.88]). Internal validation indicated similar discrimination, with an area under the receiver operating characteristic curve of 0.84.In this multicenter cohort of patients at risk for ARDS, the SLIP-2 score outperformed the original SLIP score. If validated in an independent sample, this tool may help identify surgical patients at high risk for ARDS.

SUBMITTER: Kor DJ

PROVIDER: S-EPMC3999474 | biostudies-literature | 2014 May

REPOSITORIES: biostudies-literature

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Predicting risk of postoperative lung injury in high-risk surgical patients: a multicenter cohort study.

Kor Daryl J DJ Lingineni Ravi K RK Gajic Ognjen O Park Pauline K PK Blum James M JM Hou Peter C PC Hoth J Jason JJ Anderson Harry L HL Bajwa Ednan K EK Bartz Raquel R RR Adesanya Adebola A Festic Emir E Gong Michelle N MN Carter Rickey E RE Talmor Daniel S DS

Anesthesiology 20140501 5

<h4>Background</h4>Acute respiratory distress syndrome (ARDS) remains a serious postoperative complication. Although ARDS prevention is a priority, the inability to identify patients at risk for ARDS remains a barrier to progress. The authors tested and refined the previously reported surgical lung injury prediction (SLIP) model in a multicenter cohort of at-risk surgical patients.<h4>Methods</h4>This is a secondary analysis of a multicenter, prospective cohort investigation evaluating high-risk ...[more]

PMID: 24755786

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Project description:BackgroundPostoperative pulmonary complications (PPCs) are common after major abdominal surgery. The kinetics of plasma biomarkers could improve identification of patients developing PPCs, but the kinetics may depend on intraoperative ventilator settings.ObjectiveTo test whether the kinetics of plasma biomarkers are capable of identifying patients who will develop PPCs, and whether the kinetics depend on the intraoperative level of positive end-expiratory pressure (PEEP).DesignA preplanned substudy of a randomised controlled trial.SettingOperation room of five centres.PatientsTwo hundred and forty-two adult patients scheduled for abdominal surgery at risk of developing PPCs.InterventionsHigh (12 cmH2O) versus low (≤2 cmH2O) levels of PEEP.Main outcome measuresIndividual PPCs were combined as a composite endpoint. Plasma samples were collected before surgery, directly after surgery and on the fifth postoperative day. The levels of the following were measured: tumour necrosis factor (TNF)-α, interleukin (IL)-6 and IL-8, the soluble form of the Receptor for Advanced Glycation End-products (sRAGE), Surfactant Protein (SP)-D, Clara Cell protein (CC)-16 and Krebs von den Lungen 6 (KL6).ResultsBlood sampling was complete in 242 patients: 120 patients in the high PEEP group and 122 patients in the low PEEP group. Increases in plasma levels of TNF- IL-6, IL-8 and CC-16, and a decrease in plasma levels of SP-D were greater in patients who developed PPCs; however, the area under the receiver operating characteristic curve was low for all biomarkers. CC-16 was the only biomarker whose level increased more in patients who had received high levels of PEEP.ConclusionIn patients undergoing abdominal surgery and at risk of developing PPCs, plasma levels of biomarkers for inflammation or lung injury showed distinct kinetics with development of PPCs, but none of the biomarkers showed sufficient prognostic value. The use of high levels of PEEP was associated with increased levels of CC-16, suggesting lung overdistension.Trial registrationThe PROVHILO trial, including this substudy, was registered at clinicaltrials.gov (NCT01441791).

Dataset Information

Predicting risk of postoperative lung injury in high-risk surgical patients: a multicenter cohort study.

Publications

Predicting risk of postoperative lung injury in high-risk surgical patients: a multicenter cohort study.

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