Prehospital pulse pressure and mortality of septic shock patients cared for by a mobile intensive care unit.

BACKGROUND: Septic shock medical treatment relies on a bundle of care including antibiotic therapy and hemodynamic optimisation. Hemodynamic optimisation consists of fluid expansion and norepinephrine administration aiming to optimise cardiac output to reach a mean arterial pressure of 65mmHg. In the prehospital setting, direct cardiac output assessment is difficult because of the lack of invasive and non-invasive devices. This study aims to assess the relationship between 30-day mortality and (i) initial pulse pressure (iPP) as (ii) pulse pressure variation (dPP) during the prehospital stage among patients cared for SS by a prehospital mobile intensive care unit (MICU). METHODS: From May 09th, 2016 to December 02nd, 2021, septic shock patients requiring MICU intervention were retrospectively analysed. iPP was calculated as the difference between systolic blood pressure (SBP) and diastolic blood pressure (DBP) at the first contact between the patient and the MICU team prior to any treatment and, dPP as the difference between the final PP (the difference between SBP and DBP at the end of the prehospital stage) and iPP divided by prehospital duration. To consider cofounders, the propensity score method was used to assess the relationship between (i) iPP < 40mmHg, (ii) positive dPP and 30-day mortality. RESULTS: Among the 530 patients analysed, pulmonary, digestive, and urinary infections were suspected among 43%, 25% and 17% patients, respectively. The 30-day overall mortality rate reached 31%. Cox regression analysis showed an association between 30-day mortality and (i) iPP < 40mmHg; aHR of 1.61 [1.03-2.51], and (ii) a positive dPP; aHR of 0.56 [0.36-0.88]. CONCLUSION: The current study reports an association between 30-day mortality rate and iPP < 40mmHg and a positive dPP among septic shock patients cared for by a prehospital MICU. A negative dPP could be helpful to identify septic shock with higher risk of poor outcome despite prehospital hemodynamic optimization.

Relationship between prehospital modified Charlson Comorbidity Index and septic shock 30-day mortality.

CONTEXT: In the prehospital setting, early identification of septic shock (SS) at risk of poor outcome is mainly based on clinical vital signs alteration evaluation. The Charlson Comorbidity Index (CCI) is an in-hospital tool used for burden of co-morbidity assessment. We report the relationship between the modified prehospital CCI, and 30-day mortality of SS patients initially cared for in the prehospital setting by a mobile ICU (MICU). METHODS: SS patients defined according to the 2016 sepsis-3 conference cared for by MICU between February 2017 and December 2021 were retrospectively analysed. The modified prehospital CCI calculation was based on the available comorbid conditions collected in the prehospital setting. A threshold of ≥5, was chosen according to previous results. RESULTS: Five-hundred and twenty-nine patients were included among which 154 suffering from septic shock were analysed. Presumed origin of septic shock was mainly pulmonary (36%), digestive (33%) and urinary (16%). 30 day-mortality reached 33%. Logistic regression after propensity score matching found a significant association between the 30-day mortality in the modified prehospital CCI ≥ 5: aOR = 1.12 [1.07-1.31], p = 0.041. CONCLUSION: Among septic shock patients initially cared for by a MICU in the prehospital setting, a significant association between 30-day mortality. A modified prehospital CCI of at least 6 appears to be useful for early identification of septic shock patients with poorer outcome.

Prehospital Bundle of Care Based on Antibiotic Therapy and Hemodynamic Optimization Is Associated With a 30-Day Mortality Decrease in Patients With Septic Shock.

OBJECTIVES: This study aims to investigate the association between the 30-day mortality in patients with septic shock (SS) and a prehospital bundle of care completion, antibiotic therapy administration, and hemodynamic optimization defined as a fluid expansion of at least 10 mL.kg -1 .hr -1 . DESIGN: To assess the association between prehospital BUndle of Care (BUC) completion and 30-day mortality, the inverse probability treatment weighting (IPTW) propensity method was performed. SETTING: International guidelines recommend early treatment implementation in order to reduce SS mortality. More than one single treatment, a bundle of care, including antibiotic therapy and hemodynamic optimization, is more efficient. PATIENTS: From May 2016 to March 2021, patients with SS requiring prehospital mobile ICU (mICU) intervention were retrospectively analyzed. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Among the 529 patients with SS requiring action by the mICU enrolled in this study, 354 (67%) were analyzed. Presumed pulmonary, digestive, and urinary infections were the cause of the SS in 49%, 25%, and 13% of the cases, respectively. The overall 30-day mortality was 32%. Seventy-one patients (20%) received prehospital antibiotic therapy and fluid expansion. Log binomial regression weighted with IPTW resulted in a significant association between 30-day mortality and prehospital BUC completion (respiratory rate [RR] of 0.56 [0.33-0.89]; p = 0.02 and adjusted RR 0.52 [0.27-0.93]; p = 0.03). CONCLUSIONS: A prehospital bundle of care, based on antibiotic therapy and hemodynamic optimization, is associated with a 30-day mortality decrease among patients suffering from SS cared for by an mICU.

Prehospital Lyophilized Plasma Transfusion for Trauma-Induced Coagulopathy in Patients at Risk for Hemorrhagic Shock: A Randomized Clinical Trial.

Importance: Blood transfusion is a mainstay of therapy for trauma-induced coagulopathy, but the optimal modalities for plasma transfusion in the prehospital setting remain to be defined. Objective: To determine whether lyophilized plasma transfusion can reduce the incidence of trauma-induced coagulopathy compared with standard care consisting of normal saline infusion. Design, Setting, and Participants: This randomized clinical trial was performed at multiple centers in France involving prehospital medical teams. Participants included 150 adults with trauma who were at risk for hemorrhagic shock and associated coagulopathy between April 1, 2016, and September 30, 2019, with a 28-day follow-up. Data were analyzed from November 1, 2019, to July 1, 2020. Intervention: Patients were randomized in a 1:1 ratio to receive either plasma or standard care with normal saline infusion (control). Main Outcomes and Measures: The primary outcome was the international normalized ratio (INR) on arrival at the hospital. Secondary outcomes included the need for massive transfusion and 30-day survival. As a safety outcome, prespecified adverse events included thrombosis, transfusion-related acute lung injury, and transfusion-associated circulatory overload. Results: Among 150 randomized patients, 134 were included in the analysis (median age, 34 [IQR, 26-49] years; 110 men [82.1%]), with 68 in the plasma group and 66 in the control group. Median INR values were 1.21 (IQR, 1.12-1.49) in the plasma group and 1.20 (IQR, 1.10-1.39) in the control group (median difference, -0.01 [IQR, -0.09 to 0.08]; P = .88). The groups did not differ significantly in the need for massive transfusion (7 [10.3%] vs 4 [6.1%]; relative risk, 1.78 [95% CI, 0.42-8.68]; P = .37) or 30-day survival (hazard ratio for death, 1.07 [95% CI, 0.44-2.61]; P = .89). In the full intention-to-treat population (n = 150), the groups did not differ in the rates of any of the prespecified adverse events. Conclusions and Relevance: In this randomized clinical trial including severely injured patients at risk for hemorrhagic shock and associated coagulopathy, prehospital transfusion of lyophilized plasma was not associated with significant differences in INR values vs standard care with normal saline infusion. Nevertheless, these findings show that lyophilized plasma transfusion is a feasible and safe procedure for this patient population. Trial Registration: ClinicalTrials.gov Identifier: NCT02736812.

Medicolegal issues of peri-anaesthetic dental injuries: A 21-years review of liability lawsuits in France.

BACKGROUND/AIM: Peri-anaesthetic dental injuries (PDI) represent a major source of potential malpractice claims against anesthesiologists. Studies about the medico-legal aspects of PDI have mainly focused on liability insurance cases thus not encompassing those cases brought to court. The aim of this study was to assess the medico-legal issues of PDI-related liability lawsuits in France. MATERIAL AND METHODS: A review of judicial decisions pertaining to PDI was conducted on a French legal database, spanning the period between January 2000 and October 2021. Characteristics of decisions, patients and anesthesiologists, peri-operative care, dental injuries, and convictions were collected when available for analysis. RESULTS: Twenty-four judicial decisions fulfilled the inclusion criteria and were analyzed. All cases of dental injuries took place during elective surgery, 16 in the private sector and 8 in the public sector. Most injuries concerned two or more teeth and the most predominant dental injuries were luxation or avulsion (70.8% of cases). Eight cases resulted in a final verdict in favor of the plaintiff, four in the private sector (conviction rate: 25%), and four in the public sector (conviction rate: 50%). The causes of conviction were either a lack of information (5/8), a breach in the standard of care or technical negligence (3/8). The average amount of indemnification for the plaintiff was 3614 Euros (3753 Euros in 2022 inflation-adjusted Euros) excluding legal fees. CONCLUSIONS: The analysis of PDI-related liability lawsuits shows that medico-legal issues differ from those of PDI-related insurance claims. Avulsion and luxation of multiple anterior teeth during elective surgery appear to be a risk factor for liability lawsuits. In addition, inadequacy of patient information about PDI-risk seems to be a risk factor for conviction. Lastly, dental injuries are less at risk of civil conviction than other anesthesia-related damages.

Prehospital norepinephrine administration reduces 30-day mortality among septic shock patients.

BACKGROUND: Despite differences in time of sepsis recognition, recent studies support that early initiation of norepinephrine in patients with septic shock (SS) improves outcome without an increase in adverse effects. This study aims to investigate the relationship between 30-day mortality in patients with SS and prehospital norepinephrine infusion in order to reach a mean blood pressure (MAP) > 65 mmHg at the end of the prehospital stage. METHODS: From April 06th, 2016 to December 31th, 2020, patients with SS requiring prehospital Mobile Intensive Care Unit intervention (MICU) were retrospectively analysed. To consider cofounders, the propensity score method was used to assess the relationship between prehospital norepinephrine administration in order to reach a MAP > 65 mmHg at the end of the prehospital stage and 30-day mortality. RESULTS: Four hundred and seventy-eight patients were retrospectively analysed, among which 309 patients (65%) were male. The mean age was 69 ± 15 years. Pulmonary, digestive, and urinary infections were suspected among 44%, 24% and 17% patients, respectively. One third of patients (n = 143) received prehospital norepinephrine administration with a median dose of 1.0 [0.5-2.0] mg h-1, among which 84 (69%) were alive and 38 (31%) were deceased on day 30 after hospital-admission. 30-day overall mortality was 30%. Cox regression analysis after the propensity score showed a significant association between prehospital norepinephrine administration and 30-day mortality, with an adjusted hazard ratio of 0.42 [0.25-0.70], p < 10-3. Multivariate logistic regression of IPTW retrieved a significant decrease of 30-day mortality among the prehospital norepinephrine group: ORa = 0.75 [0.70-0.79], p < 10-3. CONCLUSION: In this study, we report that prehospital norepinephrine infusion in order to reach a MAP > 65 mmHg at the end of the prehospital stage is associated with a decrease in 30-day mortality in patients with SS cared for by a MICU in the prehospital setting. Further prospective studies are needed to confirm that very early norepinephrine infusion decreases septic shock mortality.

European standard internal telephone number 2222 for in-hospital emergency calls: A national survey in all French military training hospitals.

Background: In 2016, three European scientific societies called for standardization to the "2222" as a European unique phone number in case of in-hospital emergencies. This study describes the management of in-hospital emergency calls in all French military training hospitals and aims to detail their original transition, for the first time in France, to the "2222". Methods: An electronic standardized questionnaire was emailed to heads of rapid response teams in the eight French military training hospitals. Results: All participants answered the questionnaire (100%). The eight French military training hospitals had a specific procedure for management of in-hospital emergencies. Six hospitals already used a unique phone number for in-hospital emergencies, but none of them were using the 2222 in March 2019. Two hospitals still used several phone numbers for in-hospital emergencies, mainly due to historical and local arrangements. Rapid response teams included at least a physician and a nurse. There was a discussion to switch to "2222" as the unique phone number for in-hospital emergencies in two hospitals. In both, the discussions involved hospital executive officers, medical teams, rapid response teams and technical teams leading to a step-by-step transition. Finally, in October 2019, these two hospitals launched the "2222" procedure for in-hospital emergencies. Conclusion: This study found a large disparity in the eight French military training hospitals, concerning in-hospital emergency protocols. Two French military training hospitals launched the "2222" procedure for the first time in France. Further efforts are still needed to continue to promote the use of the 2222 as a European unique phone number for in-hospital emergencies.

Identifying SARS-COV-2 infected patients through canine olfactive detection on axillary sweat samples; study of observed sensitivities and specificities within a group of trained dogs.

There is an increasing need for rapid, reliable, non-invasive, and inexpensive mass testing methods as the global COVID-19 pandemic continues. Detection dogs could be a possible solution to identify individuals infected with SARS-CoV-2. Previous studies have shown that dogs can detect SARS-CoV-2 on sweat samples. This study aims to establish the dogs' sensitivity (true positive rate) which measures the proportion of people with COVID-19 that are correctly identified, and specificity (true negative rate) which measures the proportion of people without COVID-19 that are correctly identified. Seven search and rescue dogs were tested using a total of 218 axillary sweat samples (62 positive and 156 negative) in olfaction cones following a randomised and double-blind protocol. Sensitivity ranged from 87% to 94%, and specificity ranged from 78% to 92%, with four dogs over 90%. These results were used to calculate the positive predictive value and negative predictive value for each dog for different infection probabilities (how likely it is for an individual to be SARS-CoV-2 positive), ranging from 10-50%. These results were compared with a reference diagnostic tool which has 95% specificity and sensitivity. Negative predictive values for six dogs ranged from ≥98% at 10% infection probability to ≥88% at 50% infection probability compared with the reference tool which ranged from 99% to 95%. Positive predictive values ranged from ≥40% at 10% infection probability to ≥80% at 50% infection probability compared with the reference tool which ranged from 68% to 95%. This study confirms previous results, suggesting that dogs could play an important role in mass-testing situations. Future challenges include optimal training methods and standardisation for large numbers of detection dogs and infrastructure supporting their deployment.

Adequacy of probabilistic prehospital antibiotic therapy for septic shock.

BACKGROUND: Guidelines on sepsis management recommend early recognition, diagnosis and treatment, especially early antibiotic therapy (ABT) administration in order to reduce septic shock (SS) mortality. However, the adequacy of probabilistic prehospital ABT remains unknown. METHODS: From May 2016 to March 2021, all consecutive patients with SS cared for by a prehospital mICU intervention were retrospectively analyzed. RESULTS: Among 386 patients retrospectively analyzed, 119 (33%) received probabilistic prehospital ABT, among which 74% received a 3rd generation cephalosporin: 31% cefotaxime and 42% ceftriaxone. No patient had a serious adverse effect related to ABT administration. Overall mortality rate on day-30 was 29%. Among the 119 patients with prehospital ABT, bacteriological identification was obtained for 81 (68%) patients with adequate prehospital ABT for 65 patients (80%) of which 10 (15%) deceased on day-30. Conversely, among the 16 (20%) patients with inadequate prehospital ABT, 9 patients (56%) were deceased on day-30. Prehospital adequate ABT was significantly different between alive and deceased patients on day-30 (p = 4.10-3). After propensity score matching, a significant association between adequate prehospital ABT administration and day-30 mortality was observed (aOR = 0.09 [0.01-0.47]). Inverse probability treatment weighting with multivariable logistic regression reported a day-30 mortality decrease in the adequate prehospital ABT group: aOR = 0.70 [0.53-0.93]. CONCLUSIONS: Among SS cared for by a mICU, probabilistic prehospital ABT is adequate most of the time and associated with a day-30 mortality decrease. Further prospective studies are needed to confirm these results and the weight of prehospital ABT in the prehospital bundle of care for SS.

The prehospital SIGARC score to assess septic shock in-hospital, 30-day and 90-day mortality.

BACKGROUND: In the pre-hospital setting the early identification of septic shock (SS) patients presenting with a high risk of poor outcome remains a daily challenge. The development of a simple score to quickly identify these patients is essential to optimize triage towards the appropriate unit: emergency department (ED) or intensive care unit (ICU). We report the association between the new SIGARC score and in-hospital, 30 and 90-day mortality of SS patients cared for in the pre-hospital setting by a mobile ICU (MICU). METHODS: SS patients cared for by a MICU between 2017, April 15th, and 2019, December 1st were included in this retrospective study. The SIGARC score consists of the addition of 5 following items (1 point for each one): shock index≥1, Glasgow coma scale<13, age > 65, respiratory rate > 22 and comorbidity defined by the presence of at least 2 underlying conditions among: hypertension, coronaropathy, chronic cardiac failure, chronic renal failure, chronic obstructive pulmonary disease, diabetes mellitus, history of cancer and human immunodeficiency virus infection. A threshold of SIGARC score ≥ 2 was arbitrarily chosen to define severity for its usefulness in clinical practice. RESULTS: Data from 406 SS patients requiring MICU intervention in the pre-hospital setting were analysed. The mean age was 71 ± 15 years and 268 of the patients (66%) were male. The presumed origin of SS was pulmonary (42%), digestive (25%) or urinary (17%) infection. Overall in-hospital mortality was 31% with, 30 and 90-day mortality was respectively 28% and 33%. A prehospital SIGARC score ≥ 2 is associated with an increase in 30 and 90-day mortality with HR = 1.57 [1.02-2.42] and 1.82 [1.21-2.72], respectively. CONCLUSION: A SIGARC score ≥ 2 is associated with an increase in in-hospital, 30 and 90-day mortality of SS patients cared for by a MICU in the prehospital setting. These observational results need to be confirmed by prospective studies.

Terror in Paris: Incidence and risk factors for infections related to high-energy ammunition injuries.

BACKGROUND: We aimed to assess the incidence and the risk factors for secondary wound infections associated to high-energy ammunition injuries (HEAI) in the cohort of civilian casualties from the 2015 terrorist attacks in Paris. METHODS: This retrospective multi-centric study included casualties presenting at least one HEAI who underwent surgery during the first 48 h following hospital admission. HEAI-associated infection was defined as a wound infection occurring within the initial 30 days following trauma. Risk factors were assessed using univariate and multivariate analysis. RESULTS: Among the 200 included victims, the rate of infected wounds was 11.5%. The median time between admission and the surgical revision for secondary wound infection was 11 days [IQR 9-20]. No patient died from an infectious cause. Infections were polymicrobial in 44% of the cases. The major risk factors for secondary wound infection were ISS (p < 0.001), SAPS II (p < 0.001), MGAP (p < 0.001), haemorrhagic shock (p = 0.003), use of vasopressors (p < 0.001), blood transfusion (p < 0.001), abdominal penetrating trauma (p = 0.003), open fracture (p = 0.01), vascular injury (p = 0.001), duration of surgery (p = 0.009), presence of surgical material (p = 0.01). In the multivariate analysis, the SAPS II score (OR 1.07 [1.014-1.182], p = 0.019) and the duration of surgery (OR 1.005 [1.000-1.012], p = 0.041) were the only risk factors identified. CONCLUSION: We report an 11.5% rate of secondary wound infection following high-energy ammunition injuries. Risk factors were an immediately severe condition and a prolonged surgery.

Prehospital hemodynamic optimisation is associated with a 30-day mortality decrease in patients with septic shock.

INTRODUCTION: Septic shock (SS) is characterized by low blood pressure resulting in organ failure and poor prognosis. Among SS treatments, in hospital studies reported a beneficial effect of early hemodynamic resuscitation on mortality rate. This study aims to investigate the relationship between prehospital hemodynamic optimisation and 30-day mortality in patients with SS. METHODS: From April 6th, 2016 to December 31th, 2019, patients with SS requiring prehospital Mobile Intensive Care Unit intervention (mICU) were included. Prehospital hemodynamic optimisation was defined as a arterial blood pressure of >65 mmHg, or >75 mmHg if previous hypertension history, at the end of the prehospital stage. RESULTS: Three hundred thirty-seven patients were retrospectively analysed. The mean age was 69 ± 15 years, and 226 patients (67%) were male. One hundred and thirty-six patients (40%) had previous hypertension history. Pulmonary, digestive and urinary infections were the suspected cause of the SS in respectively 46%, 23% and 15% of the cases. 30-day overall mortality was 30%. Prehospital hemodynamic optimisation was complete for 204 patients (61%). Cox regression analysis reports a significant association between prehospital hemodynamic optimisation and 30-day mortality (HRa = 0.52 95%CI [0.31-0.86], p = 0.01). CONCLUSION: In this study, we report that prehospital hemodynamic optimisation is associated with a decrease in 30-day mortality in patients with SS cared for by a mICU in the prehospital setting. An individualized mean arterial pressure target, based on previous hypertension history, may be considered from the prehospital stage of SS resuscitation.

The French Pre-Deployment Advanced Course in Anesthesia and Resuscitation: Development and Future Prospects.

INTRODUCTION: Military anesthesiologists from the French Military Medical Service (FMMS) are part of the Forward Surgical Teams deployed in overseas military operations. The practice of anesthesia in combat zones requires specific skills that are not taught during the initial curriculum for French civilian anesthesiologist. The Pre-Deployment Advanced Course in Anesthesia and Resuscitation (DACAR) program was developed to prepare military anesthesiologist from the FMMS before their deployment in overseas military operations. METHODS: Created in 2013 by the French Military Medical Academy, the DACAR program is divided into two modules and carried out once a year. The DACAR program trains all military anesthesiologist residents at the end of their curricula. Since 2019, a number of Certified Registered Nurse Anesthetists have completed the DACAR program. The DACAR program is organized around the main axes of experience feedback from previous deployments in combat zones as well as didactic learning and practical training using high-fidelity simulation. RESULTS: Since 2013, a total of 99 trainees completed the DACAR program during six complete cycles of two modules. The DACAR program has gradually been enriched from 14 courses in 2013 to 28 in 2019. Participants' reported satisfaction rates have increased steadily since 2016, when 88% of courses were rated as "interesting" or "very interesting," and only 4% as "not very interesting." By 2019, those figures had improved to 96% and 2%, respectively. CONCLUSION: The DACAR program is a structured and adapted military medical course aimed at completing the curriculum of military anesthesiologists from the FMMS before deployment in overseas military operations. Regular audits and updates ensure that the DACAR training program maintains the highest standards of quality and rigor.

Prehospital lactate clearance is associated with reduced mortality in patients with septic shock.

BACKGROUND: Assessment of disease severity in patients with septic shock (SS) is crucial in determining optimal level of care. In both pre- and in-hospital settings, blood lactate measurement is broadly used in combination with the clinical evaluation of patients as the clinical picture alone is not sufficient for assessing disease severity and outcomes. METHODS: From 15th April 2017 to 15th April 2019, patients with SS requiring prehospital mobile Intensive Care Unit intervention (mICU) were prospectively included in this observational study. Prehospital blood lactate clearance was estimated by the difference between prehospital (time of first contact between the patients and the mICU prior to any treatment) and in-hospital (at hospital admission) blood lactate levels divided by prehospital blood lactate. RESULTS: Among the 185 patients included in this study, lactate measurement was missing for six (3%) in the prehospital setting and for four (2%) at hospital admission, thus 175 (95%) were analysed for prehospital blood lactate clearance (mean age 70 ± 14 years). Pulmonary, digestive and urinary infections were probably the cause of the SS in respectively 56%, 22% and 10% of the cases. The 30-day overall mortality was 32%. Mean prehospital blood lactate clearance was significantly different between patients who died and those who survived (respectively 0.41 ± 2.50 mmol.l-1 vs 1.65 ± 2.88 mmol.l-1, p = 0.007). Cox regression analysis showed that 30-day mortality was associated with prehospital blood lactate clearance > 10% (HRa [CI95] = 0.49 [0.26-0.92], p = 0.028) and prehospital blood lactate clearance < 10% (HRa [CI95] = 2.04 [1.08-3.84], p = 0.028). CONCLUSION: A prehospital blood lactate clearance < 10% is associated with 30-day mortality increase in patients with SS handled by the prehospital mICU. Further studies will be needed to evaluate if prehospital blood lactate clearance alone or combined with clinical scores could affected the triage decision-making process for those patients.

Impact of Prehospital Antibiotic Therapy on Septic Shock Mortality.

BACKGROUND: Septic shock (SS) is associated with high morbidity and mortality rate. Early antibiotic therapy administration in septic patients was shown to reduce mortality but its impact on mortality in a prehospital setting is still under debate. To clarify this point, we performed a retrospective analysis on patients with septic shock who received antibiotics in a prehospital setting. Methods: From April 15th, 2017 to March 1st, 2020, patients with septic shock requiring Mobile Intensive Care Unit (MICU) intervention were retrospectively analyzed to assess the impact of prehospital antibiotic therapy administration on a 30-day mortality. Results: Three-hundred-eight patients with septic shock requiring MICU intervention in the prehospital setting were analyzed. The mean age of the study population was 70 ± 15 years. Presumed origin of SS was mainly pulmonary (44%), digestive (21%) or urinary (19%) infection. Overall 30-day mortality was 29%. Ninety-eight (32%) patients received antibiotic therapy. Using Cox regression analysis, we showed that prehospital antibiotic therapy significantly reduces 30-day mortality for patients with septic shock (hazard ratio = 0.56, 95%CI [0.35-0.89], p = 0.016). Conclusion: In this retrospective study, prehospital antibiotic therapy reduces 30-day mortality of septic shock patients cared for by MICU. Further studies will be needed to confirm the beneficial effect of prehospital antibiotic therapy in association or not with prehospital hemodynamic optimization to improve the survival of septic shock patients.

Assessment of the mass casualty triage during the November 2015 Paris area terrorist attacks: towards a simple triage rule.

BACKROUND: Triage is key in the management of mass casualty incidents. OBJECTIVE: The objective of this study was to assess the prehospital triage performed during the 2015 Paris area terrorist attack. DESIGN SETTING AND PARTICIPANT: This was a retrospective cohort study that included all casualties of the attacks on 13 November 2015 in Paris area, France, that were admitted alive at the hospital within the first 24 h after the events. Patients were triaged as absolute emergency or relative emergency by a prehospital physician or nurse. This triage was then compared to the one of an expert panel that had retrospectively access to all prehospital and hospital files. OUTCOMES MEASURES AND ANALYSIS: The primary endpoints were the rate of overtriage and undertriage, defined as number of patients misclassified in one triage category, divided by the total number of patients in this triage category. MAIN RESULT: Among 337 casualties admitted to the hospital, 262 (78%) were triaged during prehospital care, with, respectively, 74 (28%) and 188 (72%) as absolute and relative emergencies. Among these casualties, the expert panel classified 96 (37%) patients as absolute emergencies and 166 (63%) as relative emergency. The rate of undertriage and overtriage was 36% [95% confidence interval (CI), 27-47%] and 8% (95% CI, 4-13%), respectively. Among undertriaged casualties, 8 (23%) were considered as being severely undertriaged. Among overtriaged casualties, 10 (77%) were considered as being severely overtriaged. CONCLUSION: A simple prehospital triage for trauma casualties during the 13 November terrorist attack in Paris could have been performed triaged in 78% of casualties that were admitted to the hospital, with a 36% rate of undertriage and 8% of overtriage. Qualitative analysis of undertriage and overtriage indicate some possibilities for further improvement.

Prehospital Shock Precautions on Triage (PSPoT) score to assess in-hospital mortality for septic shock.

CONTEXT: In the prehospital setting, early identification of septic shock (SS) with high risk of poor outcome is a daily issue. There is a need for a simple tool aiming to early assess outcome in order to decide delivery unit (emergency department (ED) or intensive care unit (ICU)). In France, prehospital emergencies are managed by the Service d'Aide Médicale d'Urgence (SAMU). The SAMU physician decides the destination ward either to the ICU or to the ED after on scene severity assessment. We report the association between The Prehospital Shock Precautions on Triage (PSPoT) score, and in-hospital mortality of SS patients initially cared for in the prehospital setting by a mobile ICU (MICU). METHODS: SS patients cared for by MICU were prospectively included between February 2017 and July 2019. The PSPoT score was established by adding shock index>1 and criterion based on past medical history: age >65 years and at least 1 previous comorbidity (chronic cardiac failure, chronic renal failure, chronic obstructive pulmonary disease, previous or actual history of cancer, institutionalization, hospitalisation within previous 3 months. A threshold of ≥2, was arbitrarily chosen for clinical relevance and usefulness in clinical practice. RESULTS: One-hundred and sixty-nine with a median age of 72 [20-93] years were analysed. SS origin was mainly pulmonary (54%), abdominal (19%) and urinary (15%). The median PSPoT score was 2 [1-2]. PSPoT score and PSPoT score ≥ 2 were associated with in-hospital mortality: OR = 1.24 [0.77-2.05] and OR = 2.19 [1.09-4.59] respectively. CONCLUSION: We report an association between PSPoT score, and in-hospital mortality of SS patients cared for by a MICU. A PSPoT score ≥ 2 early identifies poorer outcome.

Can the detection dog alert on COVID-19 positive persons by sniffing axillary sweat samples? A proof-of-concept study.

The aim of this proof-of-concept study was to evaluate if trained dogs could discriminate between sweat samples from symptomatic COVID-19 positive individuals (SARS-CoV-2 PCR positive) and those from asymptomatic COVID-19 negative individuals. The study was conducted at 2 sites (Paris, France, and Beirut, Lebanon), followed the same training and testing protocols, and involved six detection dogs (three explosive detection dogs, one search and rescue dog, and two colon cancer detection dogs). A total of 177 individuals were recruited for the study (95 symptomatic COVID-19 positive and 82 asymptomatic COVID-19 negative individuals) from five hospitals, and one underarm sweat sample per individual was collected. The dog training sessions lasted between one and three weeks. Once trained, the dog had to mark the COVID-19 positive sample randomly placed behind one of three or four olfactory cones (the other cones contained at least one COVID-19 negative sample and between zero and two mocks). During the testing session, a COVID-19 positive sample could be used up to a maximum of three times for one dog. The dog and its handler were both blinded to the COVID-positive sample location. The success rate per dog (i.e., the number of correct indications divided by the number of trials) ranged from 76% to 100%. The lower bound of the 95% confidence interval of the estimated success rate was most of the time higher than the success rate obtained by chance after removing the number of mocks from calculations. These results provide some evidence that detection dogs may be able to discriminate between sweat samples from symptomatic COVID-19 individuals and those from asymptomatic COVID-19 negative individuals. However, due to the limitations of this proof-of-concept study (including using some COVID-19 samples more than once and potential confounding biases), these results must be confirmed in validation studies.

Pre-Hospital Lactatemia Predicts 30-Day Mortality in Patients with Septic Shock-Preliminary Results from the LAPHSUS Study.

BACKGROUND: Assessment of disease severity in patients with septic shock (SS) is crucial in determining optimal level of care. In both pre- and in-hospital settings, the clinical picture alone is not sufficient for assessing disease severity and outcomes. Because blood lactate level is included in the clinical criteria of SS it should be considered to improve the assessment of its severity. This study aims to investigate the relationship between pre-hospital blood lactate level and 30-day mortality in patients with SS. METHODS: From 15 April 2017 to 15 April 2019, patients with SS requiring pre-hospital Mobile Intensive Care Unit intervention (MICU) were prospectively included in the LAPHSUS study, an observational, non-randomized controlled study. Pre-hospital blood lactate levels were measured at the time of first contact between the patients and the MICU. RESULTS: Among the 183 patients with septic shock requiring action by the MICU drawn at random from LAPHSUS study patients, six (3%) were lost to follow-up on the 30th day and thus 177 (97%) were analyzed for blood lactate levels (mean age 70 ± 14 years). Pulmonary, urinary and digestive infections were probably the cause of the SS in respectively 58%, 21% and 11% of the cases. The 30-day overall mortality was 32%. Mean pre-hospital lactatemia was significantly different between patients who died and those who survived (respectively 7.1 ± 4.0 mmol/L vs. 5.9 ± 3.5 mmol/L, p < 10-3). Using Cox regression analysis adjusted for potential confounders we showed that a pre-hospital blood lactate level ≥ 4 mmol/L significantly predicted 30-day mortality in patients with SS (adjusted hazard ratio = 2.37, 95%CI (1.01-5.57), p = 0.04). CONCLUSION: In this study, we showed that pre-hospital lactatemia predicts 30-day mortality in patients with septic shock handled by the MICU. Further studies will be needed to evaluate if pre-hospital lactatemia alone or combined with clinical scores could affect the triage decision-making process for those patients.