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Martín-Rodríguez F, Ortega GJ, Castro Villamor MA, Del Pozo Vegas C, Delgado Benito JF, Martín-Conty JL, Sanz-García A, López-Izquierdo R. Development of a prehospital lactic acidosis score for early-mortality. A prospective, multicenter, ambulance-based, cohort study. Am J Emerg Med 2023; 65:16-23. [PMID: 36580696 DOI: 10.1016/j.ajem.2022.12.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 12/02/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Lactic acidosis is a clinical status related to clinical worsening. Actually, higher levels of lactate is a well-established trigger of emergency situations. The aim of this work is to build-up a prehospital early warning score to predict 2-day mortality and intensive care unit (ICU) admission, constructed with other components of the lactic acidosis besides the lactate. METHODS Prospective, multicenter, observational, derivation-validation cohort study of adults evacuated by ambulance and admitted to emergency department with acute diseases, between January 1st, 2020 and December 31st, 2021. Including six advanced life support, thirty-eight basic life support units, referring to four hospitals (Spain). The primary and secondary outcome of the study were 2-day all-cause mortality and ICU-admission. The prehospital lactic acidosis (PLA) score was derived from the analysis of prehospital blood parameters associated with the outcome using a logistic regression. The calibration, clinical utility, and discrimination of PLA were determined and compared to the performance of each component of the score alone. RESULTS A total of 3334 patients were enrolled. The final PLA score included: lactate, pCO2, and pH. For 2-day mortality, the PLA showed an AUC of 0.941 (95%CI: 0.914-0.967), a better performance in calibration, and a higher net benefit as compared to the other score components alone. For the ICU admission, the PLA only showed a better performance for AUC: 0.75 (95%CI: 0.706-0.794). CONCLUSIONS Our results showed that PLA predicts 2-day mortality better than other lactic acidosis components alone. Including PLA score in prehospital setting could improve emergency services decision-making.
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Affiliation(s)
- Francisco Martín-Rodríguez
- Faculty of Medicine, Universidad de Valladolid, Valladolid, Spain; Advanced Life Support, Emergency Medical Services (SACYL), Valladolid, Spain; Prehospital early warning scoring-system investigation group, Valladolid, Spain
| | - Guillermo J Ortega
- Health Research Institute, Hospital de la Princesa, Madrid (IIS-IP), Spain; CONICET, Argentina
| | - Miguel A Castro Villamor
- Faculty of Medicine, Universidad de Valladolid, Valladolid, Spain; Prehospital early warning scoring-system investigation group, Valladolid, Spain
| | - Carlos Del Pozo Vegas
- Faculty of Medicine, Universidad de Valladolid, Valladolid, Spain; Prehospital early warning scoring-system investigation group, Valladolid, Spain; Emergency Department, Hospital Clínico Universitario, Valladolid, Spain
| | - Juan F Delgado Benito
- Advanced Life Support, Emergency Medical Services (SACYL), Valladolid, Spain; Prehospital early warning scoring-system investigation group, Valladolid, Spain
| | - José L Martín-Conty
- Faculty of Health Sciences, Universidad de Castilla la Mancha, Talavera de la Reina, Spain
| | - Ancor Sanz-García
- Prehospital early warning scoring-system investigation group, Valladolid, Spain; Health Research Institute, Hospital de la Princesa, Madrid (IIS-IP), Spain.
| | - Raúl López-Izquierdo
- Faculty of Medicine, Universidad de Valladolid, Valladolid, Spain; Prehospital early warning scoring-system investigation group, Valladolid, Spain; Emergency Department, Hospital Universitario Rio Hortega, Valladolid, Spain
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