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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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Profound Metabolic Acidosis due to Metformin Intoxication Requiring Dialysis. Case Rep Nephrol 2021; 2021:9914982. [PMID: 34123445 PMCID: PMC8166500 DOI: 10.1155/2021/9914982] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 05/13/2021] [Accepted: 05/17/2021] [Indexed: 11/18/2022] Open
Abstract
Metformin-associated lactic acidosis (MALA) is a rare but life-threatening condition with often high mortality rates. Despite this, metformin continues to be one of the most commonly prescribed antihyperglycemic agents in the market. We present a unique case of a 61-year-old female with severe acidosis of pH = 6.72 and lactic acid of 26 mmol/L who presented obtunded after ingestion of an unknown amount of metformin. She was subsequently intubated, became hypotensive, and was initiated on vasopressors. She was swiftly started on a combination of intermittent hemodialysis (IHD) and bicarbonate therapy 7 hours after admission followed by continuous renal replacement therapy (CRRT) as she became more hemodynamically unstable. The patient's renal function improved, and she was discharged 7 days after admission with favorable sequelae. Dialysis is often reported in cases of severe MALA; however, it remains unclear how quickly dialysis should be initiated. This case aims to explore the benefits of quick initiation of extracorporeal measures in the forms of IHD and CRRT with concurrent bicarbonate supplementation. Furthermore, this case demonstrates the importance of clinical suspicion in metabolic acidosis in a patient on metformin therapy.
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Ruiz-Ramos J, Lozano-Polo L, Juanes-Borrego A, Agra-Montava I, Puig-Campmany M, Mangues-Bafalluy MA. The usefulness of measuring the anion gap in diagnosing metformin-associated lactic acidosis: a case series. J Med Case Rep 2021; 15:17. [PMID: 33472652 PMCID: PMC7818914 DOI: 10.1186/s13256-020-02655-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 12/28/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Metformin-associated lactic acidosis (MALA) is a widely documented adverse event of metformin. Despite being considered one of the main causes of metabolic acidosis, the association between an anion gap and MALA diagnosis is still uncertain. CASE PRESENTATION Cases involving six Caucasian patients with suspected MALA who were admitted to the emergency department were analysed. All these patients presented with pH values < 7.35, lactate levels > 2 mmol/L, and estimated glomerular filtration < 30 mL/min. Metformin plasma concentrations were > 2.5 mg/L in all the patients. The highest metformin concentrations were not found in the patients with the highest lactate levels. The anion gap values ranged from 12.3 to 39.3, with only two patients exhibiting values > 14. CONCLUSIONS In patients with MALA, there is a significant variability in the anion gap values, which is not related to the level of metformin accumulation, and therefore, it is doubtful whether measuring anion gaps is useful as an approach for MALA diagnosis.
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Affiliation(s)
- Jesus Ruiz-Ramos
- Pharmacy Department, Hospital Santa Creu i Sant Pau, C/San Quintín 89, 08041, Barcelona, Spain.
| | - Laura Lozano-Polo
- Emergency Department, Hospital Santa Creu i Sant Pau, Barcelona, Spain
| | - Ana Juanes-Borrego
- Pharmacy Department, Hospital Santa Creu i Sant Pau, C/San Quintín 89, 08041, Barcelona, Spain
| | - Iván Agra-Montava
- Emergency Department, Hospital Santa Creu i Sant Pau, Barcelona, Spain
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Martín-Rodríguez F, López-Izquierdo R, Medina-Lozano E, Ortega Rabbione G, Del Pozo Vegas C, Carbajosa Rodríguez V, Castro Villamor MÁ, Sánchez-Soberon I, Sanz-García A. Accuracy of prehospital point-of-care lactate in early in-hospital mortality. Eur J Clin Invest 2020; 50:e13341. [PMID: 32648960 DOI: 10.1111/eci.13341] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/21/2020] [Accepted: 07/05/2020] [Indexed: 01/01/2023]
Abstract
BACKGROUND Emergency medical services (EMS) routinely face complex scenarios where decisions should be taken with limited clinical information. The development of fast, reliable and easy to perform warning biomarkers could help in such decision-making processes. The present study aims at characterizing the validity of point-of-care lactate (pLA) during prehospital tasks for predicting in-hospital mortality within two days after the EMS assistance. MATERIALS AND METHODS Prospective, multicentric, ambulance-based and controlled observational study without intervention, including six advanced life support and five hospitals. The pLA levels were recorded during EMS assistance of adult patients. The validity of pLA to determine the in-hospital mortality was assessed by the area under the curve (AUC) of the receiver operating curve (ROC). RESULTS A total of 2997 patients were considered in the study, with a median of 69 years (IQR 54-81) and 41.4% of women. The median pLA value was 2.7 mmol/L (1.9-3.8) in survivors and 5.7 mmol/L (4.4-7.6) in nonsurvivors. The global discrimination level of pLA reached an AUC of 0.867, being 1.9 mmol/L and 4 mmol/L the cut-off point for low and high mortality. The discrimination value of pLA was not affected by sex, age or pathology. CONCLUSIONS Our results highlight the clinical importance of prehospital pLA to determine the in-hospital risk of mortality. The incorporation of pLA into the EMS protocols could improve the early identification of risky patients, leading to a better care of such patients.
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Affiliation(s)
- Francisco Martín-Rodríguez
- Advanced Clinical Simulation Center, School of Medicine, Valladolid University, Valladolid, Spain.,Emergency Medical Services-SACYL, Paseo Hospital Militar, Valladolid, Spain
| | - Raúl López-Izquierdo
- Advanced Clinical Simulation Center, School of Medicine, Valladolid University, Valladolid, Spain.,Emergency Department, Hospital Universitario Rio Hortega, Valladolid, Spain
| | - Elena Medina-Lozano
- Advanced Clinical Simulation Center, School of Medicine, Valladolid University, Valladolid, Spain
| | - Guillermo Ortega Rabbione
- Data Analysis Unit, Health Research Institute, Hospital de la Princesa (IIS-IP), Madrid, Spain.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CABA, Argentina
| | | | | | | | | | - Ancor Sanz-García
- Data Analysis Unit, Health Research Institute, Hospital de la Princesa (IIS-IP), Madrid, Spain
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Yang L, Wang W, Hu Y, Guo J, Huang X. Biocompatible chitosan-modified core-shell Fe 3O 4 nanocomposites for exigent removal of blood lactic acid. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/ab9b1c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Abstract
Excess lactic acid in blood will lead to hyperlactatemia, which is frequently detected in critically ill patients admitted to the intensive care. Reducing the blood lactic acid content using acute treatments becomes particularly important for bringing a patient out of danger. Traditional treatments often fail in case of malfunctioning of a patients’ metabolism. Herein, nanotechnology was introduced to remove blood lactic acid independent of metabolism. In this work, chitosan was employed as the shell to adsorb lactic acid, and Fe3O4 nanoparticles were employed as the core to enable proper magnetic separation property. Our data showed that core–shell nanocomposites (NCs) had an exigent and efficient adsorption behavior. Furthermore, they could be easily separated from blood plasma by magnetic separation. Thus, the good hemocompatibility and cytocompatibility indicated that of core–shell NCs hold great potential in lactic acid removal for emergent hyperlactatemia treatment.
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