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Surgery Today
Published in: Surgery Today 10/2019

01-10-2019 | Care | Original Article

Predicting mortality in patients admitted to the intensive care unit after open vascular surgery

Authors: Pedro Reis, Ana Isabel Lopes, Diana Leite, João Moreira, Leonor Mendes, Sofia Ferraz, Tânia Amaral, Fernando Abelha

Published in: Surgery Today | Issue 10/2019

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Abstract

Purposes

Vascular surgery (VS) has a higher perioperative mortality than other types of surgery. We compared different scores for predicting mortality in patients admitted to the intensive care unit (ICU) after open VS.

Methods

Patients admitted to the ICU after open VS from 2006 to 2013 were included. We calculated the Acute Physiology and Chronic Health Evaluation (APACHE), Simplified Acute Physiology Score (SAPS), Physiological and Operative Severity Score for the enUmeration of Mortality and Morbidity (POSSUM) and Preoperative Score to Predict Postoperative Mortality (POSPOM). We performed multivariate logistic regression to assess independent factors with the calculation of odds ratios (ORs) and 95% confidence intervals (CIs). We tested the predictive ability of the scores using the area under the receiver operating characteristics curve (AUROC).

Results

A total of 833 consecutive patients were included. Hospital mortality was 5.1% (1.3% after intermediate-risk and 8.4% after high-risk surgery). In the multivariate analysis, the age (OR 1.04, 95% CI 1.01–1.08, p = 0.013), smoking status (OR 2.46, 95% CI 1.16–5.21, p = 0.019), surgery risk (OR 2.92, 95% CI 1.05–8.08, p = 0.040), serum sodium level (OR 1.17, 95% CI 1.10–1.26, p < 0.001), urea (OR 1.01, 95% CI 1.01–1.02, p = 0.001) and leukocyte count (OR 1.05, 95% CI 1.01–1.10, p = 0.009) at admission were considered independent predictors. Hematocrit (0.86, 95% CI 0.80–0.93, p < 0.001) was considered an independent protective factor. The AUROC of our model was 0.860, compared to SAPS (0.752), APACHE (0.774), POSPOM (0.798) and POSSUM (0.829).

Conclusion

The observed mortality was within the predicted range (1–5% after intermediate-risk and > 5% after high-risk surgery). POSSUM and POSPOM had slightly better predictive capacity than SAPS or APACHE.
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Metadata
Title
Predicting mortality in patients admitted to the intensive care unit after open vascular surgery
Authors
Pedro Reis
Ana Isabel Lopes
Diana Leite
João Moreira
Leonor Mendes
Sofia Ferraz
Tânia Amaral
Fernando Abelha
Publication date
01-10-2019
Publisher
Springer Singapore
Keyword
Care
Published in
Surgery Today / Issue 10/2019
Print ISSN: 0941-1291
Electronic ISSN: 1436-2813
DOI
https://doi.org/10.1007/s00595-019-01805-w

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