Economic Analysis of Brief Motivational Intervention Following Trauma Related to Drugs and Alcohol.

BACKGROUND: Very few studies have conducted an economic assessment of brief motivational intervention (BMI) in patients experiencing traumatic injuries related to alcohol and/or substance use. Furthermore, findings concerning the potential long-term economic benefits of BMI applied in nursing are promising but very scarce. OBJECTIVE: The purpose of this study was to analyze the costs and benefits associated with the application of a BMI program by nursing staff to patients hospitalized for trauma related to substance use. METHODS: An analysis of costs and benefits was conducted in a nonrandomized study of a retrospective cohort of patients. An intervention and follow-up (of 10-52 months) of patients between 16 and 70 years of age admitted for traumatic injuries in University Hospital of Granada were carried out with a cohort of 294 patients (intervention = 162 vs. no intervention = 132) between 2011 and 2016. The National Health Service's perspective on the use of medical resources and the costs associated with intervention and recidivism was considered. A cost analysis with a 5-year time frame and a subsequent analysis of sensitivity were conducted. RESULTS: Direct medical costs associated with trauma recidivism were significantly lower in patients who received BMI, as compared to patients who did not receive it, &OV0556;751.82 per patient (95% CI &OV0556;13.15 to &OV0556;1,490.48) in the first year. The cost-benefit ratio of &OV0556;74.92 at 4 years reflects National Health Service savings for each euro invested in BMI. DISCUSSION: The implementation of BMI programs in nursing care may be profitable from an economic standpoint, justifying the inclusion of these programs in hospitals both because of their efficacy and the potential savings incurred by the health system. This study addresses the lack of evidence regarding the economic implications linked to the effectiveness of the intervention to reduce substance use and trauma recidivism. Results identify BMI delivered in hospitals by nurses as a technique that offers the potential for reducing costs linked to trauma recidivism. The research has important practical implications for hospital nurses and doctors.

The effect of central nervous system depressant, stimulant and hallucinogenic drugs on injury severity in patients admitted for trauma / Efecto de las drogas alucinógenas, estimulantes y depresoras del sistema nervioso central sobre la gravedad de la lesión en pacientes ingresados por traumatismos

Objective: The effect of drugs other than alcohol on severity of trauma remains unclear. Pooled data analyses in previous studies that grouped substances with opposite effects on the central nervous system (CNS) may have masked the influence of substances on injury severity. The aim was to analyze the effect of stimulant, hallucinogenic and depressant drugs other than alcohol on injury severity in trauma patients. Methods: The presence of alcohol, stimulant drugs (cocaine, amphetamines and methamphetamines), depressant drugs (benzodiazepines, opiates, methadone and barbiturates) and hallucinogenic drugs (THC and PCP) was analyzed in 1187 patients between 16 and 70 years old admitted to a trauma hospital between November 2012 and June 2015. Injury severity was determined prospectively as the Injury Severity Score. A multivariate analysis was used to quantify the strength of association between exposure to substances and trauma severity, using the presence of alcohol as a stratification variable. Results: Drugs other than alcohol were found in 371 patients (31.3%): 32 (2.7%) stimulants, 186 (15.3%) depressants, 78 (6.6%) hallucinogenics and 75 (5.6%) polydrug use. The presence of CNS depressant substances was associated with increased injury severity only in patients also exposed to alcohol, with an adjusted odds ratio of 4.63 (1.37-15.60) for moderate injuries and 7.83 (2.53-24.21) for severe. Conclusion: CNS depressant drugs had a strong influence on injury severity in patients who screened positive for alcohol consumption

Objetivo: No está claro qué efecto tienen las drogas distintas del alcohol sobre la gravedad de los traumatismos. Los análisis incluidos en estudios previos, que agrupan sustancias con efectos opuestos sobre el sistema nervioso central (SNC), pueden haber enmascarado la influencia de estas sobre la gravedad. El objetivo fue analizar el efecto de las drogas alucinógenas, estimulantes y depresoras del SNC, diferentes del alcohol, sobre la gravedad de las lesiones en pacientes ingresados por traumatismos. Métodos: Se analizó la presencia de alcohol, drogas estimulantes (cocaína, anfetaminas y metanfetaminas), depresoras (benzodiacepinas, opiáceos, metadona y barbitúricos) y alucinógenas (THC y PCP) en 1187 pacientes de entre 16 y 70 años de edad ingresados por traumatismo de noviembre de 2012 a junio de 2015. La gravedad del traumatismo se determinó prospectivamente mediante la Injury Severity Score. Se cuantificó la fuerza de la asociación entre la exposición a sustancias y la gravedad del traumatismo mediante un análisis multivariante, utilizando la presencia de alcohol como variable de estratificación. Resultados: Se encontraron drogas diferentes del alcohol en 371 pacientes (31,3%): 186 (15,3%) depresoras, 78 (6,6%) alucinógenas, 32 (2,7%) estimulantes y 75 (5,6%) combinadas. La presencia de sustancias depresoras del SNC se asoció con un aumento de la gravedad del traumatismo solo en pacientes también expuestos al alcohol, con una odds ratio ajustada de 4,63 (1,37-15,6) para lesiones moderadas y de 7,83 (2,53-24,21) para lesiones graves. Conclusión: Las drogas depresoras del SNC tuvieron una fuerte influencia en la gravedad del traumatismo en los pacientes que además presentaban resultados positivos para consumo de alcohol

The effect of central nervous system depressant, stimulant and hallucinogenic drugs on injury severity in patients admitted for trauma.

OBJECTIVE: The effect of drugs other than alcohol on severity of trauma remains unclear. Pooled data analyses in previous studies that grouped substances with opposite effects on the central nervous system (CNS) may have masked the influence of substances on injury severity. The aim was to analyze the effect of stimulant, hallucinogenic and depressant drugs other than alcohol on injury severity in trauma patients. METHODS: The presence of alcohol, stimulant drugs (cocaine, amphetamines and methamphetamines), depressant drugs (benzodiazepines, opiates, methadone and barbiturates) and hallucinogenic drugs (THC and PCP) was analyzed in 1187 patients between 16 and 70 years old admitted to a trauma hospital between November 2012 and June 2015. Injury severity was determined prospectively as the Injury Severity Score. A multivariate analysis was used to quantify the strength of association between exposure to substances and trauma severity, using the presence of alcohol as a stratification variable. RESULTS: Drugs other than alcohol were found in 371 patients (31.3%): 32 (2.7%) stimulants, 186 (15.3%) depressants, 78 (6.6%) hallucinogenics and 75 (5.6%) polydrug use. The presence of CNS depressant substances was associated with increased injury severity only in patients also exposed to alcohol, with an adjusted odds ratio of 4.63 (1.37-15.60) for moderate injuries and 7.83 (2.53-24.21) for severe. CONCLUSION: CNS depressant drugs had a strong influence on injury severity in patients who screened positive for alcohol consumption.

Association between the detection of alcohol, illicit drugs and/or psychotropic medications/opioids in patients admitted due to trauma and trauma recidivism: A cohort study.

OBJECTIVE: To quantify the association between the presence and type of drug detected and trauma recidivism in a cohort of patients admitted due to trauma. METHOD: A cohort study was conducted based on data from a project where the presence of alcohol and other drugs (cannabis, cocaine, amphetamines, methamphetamines, tricyclic antidepressants, barbiturates, opiates and benzodiazepines) was analysed in 1,187 patients aged 16 to 70 years admitted due to trauma. The patients were followed for a period of between 10 to 52 months until June 2016. For this study, the recurrence of injuries from a sample of 929 patients from this cohort was analysed according to their consumption profile. Survival curves were estimated and adjusted Hazard Rate Ratios (aHRR) and adjusted incidence rate ratios (aIRR) were calculated. RESULTS: The incidence rate of TR was 10.94 cases per 100 patient-years in the group of patients negative for substances and 27.99 per 100 patient-years in positive patients. The survival curves show very significant differences in cumulative recurrence-free survival between the groups (Log Rank: p<0.001). Both the aHRR and the aIRR estimates show an increased risk of re-injury due to alcohol consumption (aIRR: 2.33 (1.72-3.15), p<0.001), cannabis use (aIRR: 1.87 (1.09-3.20), p = 0.022) and polydrug use (aIRR: 2.34 (1.80-3.04), p<0.001). CONCLUSIONS: The presence of alcohol and/or illicit drugs in these patients doubles the risk of trauma recidivism.

Risk factors for intracranial lesions and mortality in older patients with mild traumatic brain injuries.

PRIMARY OBJECTIVE: To identify risk factors for intracerebral lesion (ICL) in older adults with mild traumatic brain injury (MTBI) and evaluate the influence of comorbidities on outcomes. RESEARCH DESIGN: Prospective cohort study. METHODS AND PROCEDURES: Information was gathered on clinical history/examination, cranial computed tomography, admission Glasgow Coma Scale (GCS) score, analytical and coagulation findings, and mortality at 1 week post-discharge. Bivariate and multivariate logistic regression analyses were performed, calculating odds ratios for ICL with 95% confidence interval. P < 0.05 was considered significant. MAIN OUTCOMES AND RESULTS: Data were analyzed on 504 patients with mean±SD age of 79.37 ± 8.06 years. Multivariate analysis showed that traffic accident, GCS score of 14/15, transient consciousness loss, nausea, and receipt of antiplatelets were predictors of ICL, while SRRI and/or benzodiazepine intake was a protective factor. A score was assigned to patients by rounding OR values, and a score ≥1 indicated moderate/high risk of ICL. CONCLUSIONS: MTBI management should be distinct in over-60 year-olds, who may not present typical symptoms, with frequent comorbidities. Knowledge of risk factors for post-MTBI ICL, associated with higher mortality, is important to support clinical decision-making. Further research is warranted to verify our novel finding that benzodiazepines and/or SSRI inhibitors may act as neuroprotectors.

Alcohol or Drug Use and Trauma Recidivism.

BACKGROUND: Alcohol, illicit drugs, and psychotropic medications are well-known causes of traumatic events. However, the association of each type of substance with trauma recidivism remains unclear. OBJECTIVES: The purpose of this study was to quantify the strength of associations between the type of substance detected in patients admitted for traumatic injury and trauma recidivism, defined as a documented history of past trauma. METHODS: The presence of alcohol and drugs (cannabis, cocaine, amphetamines, methamphetamines, benzodiazepines, opiates, methadone, barbiturates, and tricyclic antidepressants) was analyzed in 1,156 patients between 16 and 70 years old, hospitalized in a trauma hospital between November 2011 and March 2015. Their past trauma history was retrieved from the health information system, which included patient health histories since 1999. Multinomial logistic regression analysis was used to estimate the strength of the association between types of substances detected in current trauma patients and trauma recidivism (documented history of past trauma). RESULTS: At least one substance was detected in 521 patients (45.1%): only alcohol in 159 (13.7%), only cannabis in 62 (5.4%), only psychotropic medications/opioids in 145 (12.5%), only cocaine/amphetamines in 14 (1.2%), and a combination of these groups in 141 (12.2%). The consumption of alcohol, illicit drugs, and/or psychotropic medications was associated with increased recidivism in all substance groups; the adjusted odds ratio for multiple recidivism was 3.17 (95% CI [2.29, 4.39]). CONCLUSION: Patients who screened positive for alcohol, illicit drugs, and/or psychotropic medications had a higher frequency of past trauma history compared with patients with negative tests, independently of age, gender, or the presence of previous psychiatric disorders.

Effect of a brief intervention for alcohol and illicit drug use on trauma recidivism in a cohort of trauma patients.

OBJECTIVE: Estimate the effectiveness of brief interventions in reducing trauma recidivism in hospitalized trauma patients who screened positive for alcohol and/or illicit drug use. METHODS: Dynamic cohort study based on registry data from 1818 patients included in a screening and brief intervention program for alcohol and illicit drug use for hospitalized trauma patients. Three subcohorts emerged from the data analysis: patients who screened negative, those who screened positive and were offered brief intervention, and those who screened positive and were not offered brief intervention. Follow-up lasted from 10 to 52 months. Trauma-free survival, adjusted hazard rate ratios (aHRR) and adjusted incidence rate ratios (aIRR) were calculated, and complier average causal effect (CACE) analysis was used. RESULTS: We found a higher cumulative risk of trauma recidivism in the subcohort who screened positive. In this subcohort, an aHRR of 0.63 (95% CI: 0.41-0.95) was obtained for the group offered brief intervention compared to the group not offered intervention. CACE analysis yielded an estimated 52% reduction in trauma recidivism associated with the brief intervention. CONCLUSION: The brief intervention offered during hospitalization in trauma patients positive for alcohol and/or illicit drug use can halve the incidence of trauma recidivism.

Competencias profesionales y trabajo en equipo en pacientes con enfermedades cardiacas agudas y críticas / Professional competence and teamwork in the treatment of patients with acute and critical heart disease

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The European guideline on management of major bleeding and coagulopathy following trauma: fourth edition.

BACKGROUND: Severe trauma continues to represent a global public health issue and mortality and morbidity in trauma patients remains substantial. A number of initiatives have aimed to provide guidance on the management of trauma patients. This document focuses on the management of major bleeding and coagulopathy following trauma and encourages adaptation of the guiding principles to each local situation and implementation within each institution. METHODS: The pan-European, multidisciplinary Task Force for Advanced Bleeding Care in Trauma was founded in 2004 and included representatives of six relevant European professional societies. The group used a structured, evidence-based consensus approach to address scientific queries that served as the basis for each recommendation and supporting rationale. Expert opinion and current clinical practice were also considered, particularly in areas in which randomised clinical trials have not or cannot be performed. Existing recommendations were reconsidered and revised based on new scientific evidence and observed shifts in clinical practice; new recommendations were formulated to reflect current clinical concerns and areas in which new research data have been generated. This guideline represents the fourth edition of a document first published in 2007 and updated in 2010 and 2013. RESULTS: The guideline now recommends that patients be transferred directly to an appropriate trauma treatment centre and encourages use of a restricted volume replacement strategy during initial resuscitation. Best-practice use of blood products during further resuscitation continues to evolve and should be guided by a goal-directed strategy. The identification and management of patients pre-treated with anticoagulant agents continues to pose a real challenge, despite accumulating experience and awareness. The present guideline should be viewed as an educational aid to improve and standardise the care of the bleeding trauma patients across Europe and beyond. This document may also serve as a basis for local implementation. Furthermore, local quality and safety management systems need to be established to specifically assess key measures of bleeding control and outcome. CONCLUSIONS: A multidisciplinary approach and adherence to evidence-based guidance are key to improving patient outcomes. The implementation of locally adapted treatment algorithms should strive to achieve measureable improvements in patient outcome.

The effects of advanced monitoring on hemodynamic management in critically ill patients: a pre and post questionnaire study.

In critically ill patients, many decisions depend on accurate assessment of the hemodynamic status. We evaluated the accuracy of physicians' conventional hemodynamic assessment and the impact that additional advanced monitoring had on therapeutic decisions. Physicians from seven European countries filled in a questionnaire in patients in whom advanced hemodynamic monitoring using transpulmonary thermodilution (PiCCO system; Pulsion Medical Systems SE, Feldkirchen, Germany) was going to be initialized as part of routine care. The collected information included the currently proposed therapeutic intervention(s) and a prediction of the expected transpulmonary thermodilution-derived variables. After transpulmonary thermodilution measurements, physicians recorded any changes that were eventually made in the original therapeutic plan. A total of 315 questionnaires pertaining to 206 patients were completed. The mean difference (±standard deviation; 95 % limits of agreement) between estimated and measured hemodynamic variables was -1.54 (±2.16; -5.77 to 2.69) L/min for the cardiac output (CO), -74 (±235; -536 to 387) mL/m(2) for the global end-diastolic volume index (GEDVI), and -0.5 (±5.2; -10.6 to 9.7) mL/kg for the extravascular lung water index (EVLWI). The percentage error for the CO, GEDVI, and EVLWI was 66, 64, and 95 %, respectively. In 54 % of cases physicians underestimated the actual CO by more than 20 %. The information provided by the additional advanced monitoring led 33, 22, 22, and 13 % of physicians to change their decisions about fluids, inotropes, vasoconstrictors, and diuretics, respectively. The limited clinical ability of physicians to correctly assess the hemodynamic status, and the significant impact that more physiological information has on major therapeutic decisions, support the use of advanced hemodynamic monitoring in critically ill patients.

Asynchronies during mechanical ventilation are associated with mortality.

PURPOSE: This study aimed to assess the prevalence and time course of asynchronies during mechanical ventilation (MV). METHODS: Prospective, noninterventional observational study of 50 patients admitted to intensive care unit (ICU) beds equipped with Better Care™ software throughout MV. The software distinguished ventilatory modes and detected ineffective inspiratory efforts during expiration (IEE), double-triggering, aborted inspirations, and short and prolonged cycling to compute the asynchrony index (AI) for each hour. We analyzed 7,027 h of MV comprising 8,731,981 breaths. RESULTS: Asynchronies were detected in all patients and in all ventilator modes. The median AI was 3.41 % [IQR 1.95-5.77]; the most common asynchrony overall and in each mode was IEE [2.38 % (IQR 1.36-3.61)]. Asynchronies were less frequent from 12 pm to 6 am [1.69 % (IQR 0.47-4.78)]. In the hours where more than 90 % of breaths were machine-triggered, the median AI decreased, but asynchronies were still present. When we compared patients with AI > 10 vs AI ≤ 10 %, we found similar reintubation and tracheostomy rates but higher ICU and hospital mortality and a trend toward longer duration of MV in patients with an AI above the cutoff. CONCLUSIONS: Asynchronies are common throughout MV, occurring in all MV modes, and more frequently during the daytime. Further studies should determine whether asynchronies are a marker for or a cause of mortality.

Comparison of two repositioning schedules for the prevention of pressure ulcers in patients on mechanical ventilation with alternating pressure air mattresses.

PURPOSE: The objective was to compare the effectiveness of repositioning every 2 or 4 h for preventing pressure ulcer development in patients in intensive care unit under mechanical ventilation (MV). METHODS: This was a pragmatic, open-label randomized clinical trial in consecutive patients on an alternating pressure air mattress (APAM) requiring invasive MV for at least 24 h in a university hospital in Spain. Eligible participants were randomly assigned to groups for repositioning every 2 (n = 165) or 4 (n = 164) h. The primary outcome was the incidence of a pressure ulcer of at least grade II during ICU stay. RESULTS: A pressure ulcer of at least grade II developed in 10.3% (17/165) of patients turned every 2 h versus 13.4% (22/164) of those turned every 4 h (hazard ratio [HR] 0.89, 95% confidence interval [CI] 0.46-1.71, P = 0.73). The composite end point of device-related adverse events was recorded in 47.9 versus 36.6% (HR 1.50, CI 95% 1.06-2.11, P = 0.02), unplanned extubation in 11.5 versus 6.7% (HR 1.77, 95% CI 0.84-3.75, P = 0. 13), and endotracheal tube obstruction in 36.4 versus 30.5%, respectively (HR 1.44, 95% CI 0.98-2.12, P = 0.065). The median (interquartile range) daily nursing workload for manual repositioning was 21 (14-27) versus 11 min/patient (8-15) (P < 0.001). CONCLUSIONS: A strategy aimed at increasing repositioning frequency (2 versus 4 h) in patients under MV and on an APAM did not reduce the incidence of pressure ulcers. However, it did increase device-related adverse events and daily nursing workload.

Relationship between volume and survival in closed intensive care units is weak and apparent only in mechanically ventilated patients.

BACKGROUND: Recent studies have found an association between increased volume and increased intensive care unit (ICU) survival; however, this association might not hold true in ICUs with permanent intensivist coverage. Our objective was to determine whether ICU volume correlates with survival in the Spanish healthcare system. METHODS: Post hoc analysis of a prospective study of all patients admitted to 29 ICUs during 3 months. At ICU discharge, the authors recorded demographic variables, severity score, and specific ICU treatments. Follow-up variables included ICU readmission and hospital mortality. Statistics include logistic multivariate analyses for hospital mortality according to quartiles of volume of patients. RESULTS: The authors studied 4,001 patients with a mean predicted risk of death of 23% (range at hospital level: 14-46%). Observed hospital mortality was 19% (range at hospital level: 11-35%), resulting in a standardized mortality ratio of 0.81 (range: 0.5-1.3). Among the 1,923 patients needing mechanical ventilation, the predicted risk of death was 32% (14-60%) and observed hospital mortality was 30% (12-61%), resulting in a standardized mortality ratio of 0.96 (0.5-1.7). The authors found no correlation between standardized mortality ratio and ICU volume in the entire population or in mechanically ventilated patients. Only mechanically ventilated patients in very low-volume ICUs had slightly worse outcome. CONCLUSION: In the currently studied healthcare system characterized by 24/7 intensivist coverage, the authors found wide variability in outcome among ICUs even after adjusting for severity of illness but no relationship between ICU volume and outcome. Only mechanically ventilated patients in very low-volume centers had slightly worse outcomes.

The STOP the Bleeding Campaign.

According to the World Health Organization, traumatic injuries worldwide are responsible for over 5 million deaths annually. Post-traumatic bleeding caused by traumatic injury-associated coagulopathy is the leading cause of potentially preventable death among trauma patients. Despite these facts, awareness of this problem is insufficient and treatment options are often unclear. The STOP the Bleeding Campaign therefore aims to increase awareness of the phenomenon of post-traumatic coagulopathy and its appropriate management by publishing European guidelines for the management of the bleeding trauma patient, by promoting and monitoring the implementation of these guidelines and by preparing promotional and educational material, organising activities and developing health quality management tools. The campaign aims to reduce the number of patients who die within 24 hours after arrival in the hospital due to exsanguination by a minimum of 20% within the next 5 years.

Management of bleeding and coagulopathy following major trauma: an updated European guideline.

INTRODUCTION: Evidence-based recommendations are needed to guide the acute management of the bleeding trauma patient. When these recommendations are implemented patient outcomes may be improved. METHODS: The multidisciplinary Task Force for Advanced Bleeding Care in Trauma was formed in 2005 with the aim of developing a guideline for the management of bleeding following severe injury. This document represents an updated version of the guideline published by the group in 2007 and updated in 2010. Recommendations were formulated using a nominal group process, the Grading of Recommendations Assessment, Development and Evaluation (GRADE) hierarchy of evidence and based on a systematic review of published literature. RESULTS: Key changes encompassed in this version of the guideline include new recommendations on the appropriate use of vasopressors and inotropic agents, and reflect an awareness of the growing number of patients in the population at large treated with antiplatelet agents and/or oral anticoagulants. The current guideline also includes recommendations and a discussion of thromboprophylactic strategies for all patients following traumatic injury. The most significant addition is a new section that discusses the need for every institution to develop, implement and adhere to an evidence-based clinical protocol to manage traumatically injured patients. The remaining recommendations have been re-evaluated and graded based on literature published since the last edition of the guideline. Consideration was also given to changes in clinical practice that have taken place during this time period as a result of both new evidence and changes in the general availability of relevant agents and technologies. CONCLUSIONS: A comprehensive, multidisciplinary approach to trauma care and mechanisms with which to ensure that established protocols are consistently implemented will ensure a uniform and high standard of care across Europe and beyond.

Comparison of alternating pressure mattresses and overlays for prevention of pressure ulcers in ventilated intensive care patients: a quasi-experimental study.

AIM: To compare the effectiveness of alternating pressure air mattresses vs. overlays to prevent pressure ulcers in mechanically ventilated patients in intensive care units. BACKGROUND: Pressure ulcers prevention is an important issue in the nursing of critically ill patients. It is not clear whether alternating pressure air mattresses are more effective than overlays to prevent pressure ulcers. DESIGN: Prospective quasi-experimental study. METHODS: A prospective quasi-experimental study was conducted among patients in the medical-surgery intensive care unit of a university hospital on mechanical ventilation ≥24 hours during two time periods (2001 and 2006). Overlays were used in 2001 and mattresses in 2006. Primary outcome was the incidence of pressure ulcers grade ≥II (according to the European Pressure Ulcer Advisory Panel) during intensive care unit stay. RESULTS: The study included 221 patients (116 in 2001 and 105 in 2006). Baseline characteristics were similar between groups except for a higher Acute Physiology and Chronic Health Evaluation III score, total and first-day respiratory Sequential Organ Failure Assessment Score on day 1 in overlay group. There was significantly lower incidence density in the mattress vs. overlay group (12·41 cases/1000 days vs. 18·67 cases/1000 days of stay). The multivariate analyses showed the use of the mattress to be a protective factor against pressure ulcer onset. CONCLUSION: This quasi-experiment study that alternative pressure air mattresses were more effective than alternating pressure air overlays in preventing pressure ulcers in mechanically ventilated critical care patients.

Alveolar overdistension as a cause of lung injury: differences among three animal species.

This study analyses characteristics of lung injuries produced by alveolar overdistension in three animal species. Mechanical ventilation at normal tidal volume (10 mL/Kg) and high tidal volume (50 mL/Kg) was applied for 30 min in each species. Data were gathered on wet/dry weight ratio, histological score, and area of alveolar collapse. Five out of six rabbits with high tidal volume developed tension pneumothorax, and the rabbit results were therefore not included in the histological analysis. Lungs from the pigs and rats showed minimal histological lesions. Pigs ventilated with high tidal volume had significantly greater oedema, higher neutrophil infiltration, and higher percentage area of alveolar collapse than rats ventilated with high tidal volume. We conclude that rabbits are not an appropriate species for in vivo studies of alveolar overdistension due to their fragility. Although some histological lesions are observed in pigs and rats, the lesions do not appear to be relevant.

Prevención secundaria en patología traumática: ¿influye el interés comercial en la implementación de la evidencia científica? / Secondary prevention in trauma pathology. Is there an influence of comercial interests on evidence implementation?

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