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Aim: This study aimed to assess the association between gasping and survival among out-of-hospital cardiac arrest (OHCA) patients requiring extracorporeal cardiopulmonary resuscitation (ECPR). Methods: This prospective, multicenter, observational study was conducted between 2019 and 2021. We categorized adult patients requiring ECPR into those with or without gasping prior to hospital arrival. The primary outcome was the 30-day survival. We performed multivariable logistic regression analyses fitted with generalized estimating equations and subgroup analyses based on the initial rhythm and age. Results: Of the 9,909 patients with OHCA requiring ECPR, 332 were enrolled in the present study, including 92 (27.7%) and 240 (72.3%) with and without gasping, respectively. The 30-day survival was higher in patients with gasping than in those without gasping (35.9% [33/92] vs. 16.2% [39/240]). In the logistic regression analysis, gasping was significantly associated with improved 30-day survival (adjusted odds ratio: 3.01; 95% confidence interval, 1.64-5.51). Subgroup analyses demonstrated similar trends in patients with an initial non-shockable rhythm and older age. Conclusions: Gasping was associated with improved survival in OHCA patients requiring ECPR, even those with an initial non-shockable rhythm and older age. Clinicians may select the candidates for ECPR appropriately based on the presence of gasping.
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This case report highlights the rare occurrence of Wernicke encephalopathy caused by malnutrition in a depressed patient with atypical imaging findings. A 60-year-old female with depression developed a disturbance of consciousness owing to Wernicke encephalopathy. Magnetic resonance imaging showed abnormal signals in the thalamus and mammillary bodies around the third ventricle, cerebral aqueduct, and fourth ventricle. Abnormal signals were also present in the cerebral cortex around the central sulcus, and an intracranial hemorrhage from the thalamus was observed. Therefore, clinicians should consider Wernicke encephalopathy in the differential diagnosis of altered consciousness in depressed patients. Early assessment of nutritional status and prompt intervention are crucial in cases of prolonged depression-related malnutrition.
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Aim: To assess the association between body mass index (BMI) and neurological outcomes among patients with out-of-hospital cardiac arrest (OHCA). Methods: This prospective, multicenter, observational study conducted between 2019 and 2021 included adults with OHCA who were hospitalized after return of spontaneous circulation. Based on the BMI, the patients were categorized as underweight (BMI < 18.5 kg/m2), normal weight (BMI 18.5-24.9 kg/m2), overweight (BMI 25.0-29.9 kg/m2), or obese (BMI ≥ 30 kg/m2). The normal weight group served as the reference. Favorable neurological outcomes were defined as a Cerebral Performance Category score of ≤2 at 30 days. Multivariate logistic regression analyses were performed to adjust for patient characteristics, OHCA circumstances, and time variables. Results: Of the 9,909 patients with OHCA who presented during the study period, 637 were eligible, of whom 10.8% (69/637), 48.9% (312/637), 27.6% (176/637), and 12.5% (80/637) were underweight, normal weight, overweight, and obese, respectively. These groups had favorable neurological outcome in 23.2%, 29.2%, 20.5%, and 16.2% of patients, respectively. Obese and overweight patients had a significantly lower rate of favorable neurologic outcomes (adjusted odds ratio [OR] = 0.35; 95% confidence interval [CI] = 0.16-0.77; adjusted OR = 0.53; 95% CI = 0.31-0.90, respectively) than those with a normal weight. Conclusions: Obese and overweight patients with OHCA have reduced rates of favorable neurological outcomes, suggesting that clinicians should pay attention to the BMI of patients.
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[This corrects the article DOI: 10.1016/j.heliyon.2023.e15278.].
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Background and objective Epinephrine (Ep) is the first choice as a vasoconstrictor in cardiopulmonary resuscitation (CPR) for patients with cardiopulmonary arrest (CPA); however, the Ep concentration in the serum of CPA patients is still unclear. The aim of this study was to evaluate the association between serum Ep levels and achieving the return of spontaneous circulation (ROSC) in out-of-hospital cardiac arrest (OHCA) patients with ventricular fibrillation (VF). Methods This was a prospective, observational clinical study involving OHCA patients with VF transferred to our hospital from July 2014 to July 2017. The measurement of serum catecholamines [Ep, norepinephrine (Nep), and dopamine (DOA)] and vasopressin [antidiuretic hormone (ADH)] levels was performed with blood samples obtained immediately upon patients' arrival at our hospital. Patients were classified into two groups: the ROSC(+) group and ROSC(-) group; the serum concentrations of catecholamines and ADH were compared between these two groups. Results The serum Ep and Nep levels were lower in the ROSC(+) group than those in the ROSC(-) group and the difference was statistically significant. On the other hand, no significant differences were found in serum DOA and ADH levels between the two groups. Conclusions The results of this study suggest that an increment in serum Ep levels does not promote achieving ROSC in OHCA patients with VF.
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Background Tetanus is an infectious disease caused by Clostridium tetani, which produces tetanospasmin. Intensive care using sedatives and muscle relaxants is required for the management of severe tetanus, however, long-term use of those medicines is associated with the occurrence of post-intensive care syndrome (PICS). Shakuyakukanzoto (SKT), which is clinically used for the treatment of pain associated with sudden myospasm widely, is one of Kampo medicines, and some studies showed that they are effective in treating muscle spasms caused by tetanus. The purpose of this study is to evaluate the usefulness of SKT in the management of tetanus patients from the viewpoint of the reduction of sedatives. Methods Patients who were diagnosed with tetanus and were treated in our hospital between January 2006 and December 2022 were included. Patients were divided into two groups, patients treated with SKT and those without SKT, and the background information and clinical courses, especially the reduction of sedatives, were compared between the two groups. Results There were five tetanus patients who were treated with SKT (SKT(+) group) and two tetanus patients without SKT (SKT(-) group), respectively. Intubation and mechanical ventilation were required for the management of generalized seizures in all seven patients, who were admitted to the intensive care unit (ICU). The administration of propofol could be discontinued after an average of 8.6 days (range: 3-22 days) from the initiation of SKT administration. The dosage of propofol was lower in patients who received SKT versus those who did not; midazolam and fentanyl exhibited a similar tendency. The mean durations of ICU and hospital stays for patients treated with or without SKT were almost equal (the mean durations of ICU stay in SKT(+) and SKT(-) groups were 22.6 and 24.0 days, and those of hospital stay in SKT(+) and SKT(-) groups were 35.2 and 36.0 days, respectively). All seven patients were discharged and transferred to another hospital for rehabilitation. Conclusions SKT may be useful in the management of myospasms in patients with tetanus. It may also prevent the occurrence of PICU in patients with tetanus who require intensive care by reducing the use of sedatives and analgesics.
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Purpose Elderly trauma patients have a higher risk of severe disability and death, and this outcome burden in elderly trauma patients must be addressed in countries in which the population is aging. The clarification of the unique clinical features of elderly people who have experienced trauma is important. The purpose of this study is to evaluate the significance of the treatment for elderly severe trauma patients based on the prognosis and total hospital cost. Methods Trauma patients transferred to our emergency department (ED) and admitted to our intensive care unit (ICU) directly or through emergency surgery between January 2013 and December 2019 were examined. We divided patients into three groups: <65 years old (Group Y); 65-79 years old (Group M); and ≥80 years old (Group E). We compared the pre- and post-trauma American Society of Anesthesiology Physical Status (ASA-PS) score and the Katz Activities of Daily Living (ADL) questionnaire at arrival among the three groups. In addition, the duration of ICU and hospital stays, hospital mortality, and total treatment costs were compared. Results There were 1,652 patients admitted to ICU through the ED from January 2013 to December 2019. Of those patients, 197 trauma patients were analyzed. There was no significant difference in injury severity scores between the groups. Significant differences in both the ASA-PS and Katz-ADL scores in posttrauma status were observed among the three groups (posttrauma ASA-PS, 2.0 (2.0, 2.8) in Group Y, 3.0 (2.0, 3.0) in Group M, 3.0 (3.0, 3.0) in Group E, p < 0.001*, posttrauma Katz-ADL, 10.0 (3.3, 12.0) in Group Y, 5.5 (2.0, 10.0) in Group M, 2.0 (0.5, 4.0) in Group E, p < 0.001). The duration of both ICU and hospital stay was significantly longer in Group E compared to the other groups (ICU stay, 4.0 (3.0, 6.5) days in Group Y, 4.0 (3.0, 9.8) days in Group M, 6.5 (3.0, 15.3) days, p = 0.006, hospital stay, 16.9 (8.6, 33.0) days in Group Y, 26.7 (12.0, 51.8) days in Group M, 32.5 (12.8, 51.5) days in Group E, p = 0.005). ICU and hospital mortality were highest in Group E compared with the other groups, but the differences were not significant. Finally, the total hospital cost in Group E was significantly higher than the other groups. Conclusions In elderly trauma patients who required intensive care, PS and ADL in posttrauma status were worse, ICU and hospital stays were longer, and ICU and hospital mortality were higher compared with younger patients. In addition, medical costs were greater in elderly patients. It is supposed that the therapeutic effect observed in young trauma patients cannot be expected in elderly trauma patients.
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Background: Blunt chest trauma is a common presentation in emergency departments. The relationship between bone fractures and organ injuries has not been studied in detail. The purpose of this study was to examine the degree of external force represented by the number of rib fractures that causes lung injury in blunt chest trauma. Patients and methods: This study was performed retrospectively using trauma patients who received medical examinations in a single university hospital emergency center between April 2015 and March 2020. We examined the association between the number of rib fractures and pulmonary damage using multivariable regression analysis and considered the relationship between rib fracture location and each type of lung injury. Results: A total of 317 patients were included. The mean age was 63.1 years, 65.0% were male, and traffic accidents were the most common mechanism of injury (55.8%). The number of mean rib fractures was 4.0, and the mean Injury Severity Score was 11.3. The number of rib fractures was associated with an increased risk of pulmonary injuries: pulmonary contusion (odds ratio [OR] 1.30, 95% confidence interval [CI] 1.14-1.48, p < 0.05); hemothorax (OR 1.22, 95% CI 1.08-1.38, p < 0.05); pneumothorax (OR 1.15, 95% CI 1.02-1.30, p < 0.05); and hemopneumothorax (OR 1.14, 95% CI 1.01-1.28, p < 0.05). In addition, bilateral rib fractures were associated with fractures of the superior ribs more often and more severely, but were not associated with the occurrence of each type of lung injury. Conclusion: The number of rib fractures was associated with an increased risk of pulmonary injuries. In addition, the type of pulmonary injury could be predicted from the number of rib fractures in blunt chest trauma.
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A woman in her 80s was found unconscious after being hit by a car while crossing a road. After admission to hospitals, computed tomography (CT) scans revealed traumatic brain injury (TBI), and the patient was treated symptomatically. However, despite improvement of TBI in CT images, she died unexpectedly. Postmortem CT demonstrated cerebral infarction in the territory of the right middle cerebral artery (MCA). Histopathological examination revealed lumen-obstructing thrombosis and intimal injury upstream of the thrombosis in the right MCA. These findings suggested that the intimal injury in the MCA had led to thrombus formation, and thromboembolism in the region distal to the injury leading to post-traumatic cerebral infarction (PTCI). Both postmortem CT and autopsy were able to reveal the final condition of the deceased, which had not been fully anticipated by the clinicians who had treated her after the accident. The longitudinal antemortem to postmortem course revealed by multiple CT images and the histopathological examination provided crucial clues to the pathogenesis of PTCI in this case.
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Lesiones Traumáticas del Encéfalo , Trombosis , Humanos , Femenino , Arteria Cerebral Media/diagnóstico por imagen , Arteria Cerebral Media/patología , Infarto Cerebral/diagnóstico por imagen , Infarto Cerebral/etiología , Infarto Cerebral/patología , Autopsia , Tomografía Computarizada por Rayos X , Trombosis/complicaciones , Lesiones Traumáticas del Encéfalo/complicacionesRESUMEN
BACKGROUND & AIMS: Over the past decades, particulate matter (PM), especially fine PM <2.5 µm in aerodynamic diameter (PM2.5) has been a major research focus. However, the air pollutant is a mixture of gases or vapour-phase compounds, such as carbon monoxide (C), nitrogen oxides (NOx), photochemical oxidants (Ox), and sulfur dioxide (SO2). Little is known about their cardiovascular effect, individually or in combination with PM. Thus, we aimed to determine the associations between the incidence of acute cardiac events and both gaseous and PM using a case-crossover design. METHODS: Cardiovascular cases were identified through the Gunma Prefectural Ambulance Activity Database in Japan in 2015 (1,512 out-of-hospital cardiac arrest [OHCA] and 1,002 heart failures from 53,006 ambulance cases). Air quality data from the nearest station was for day of the arrest (lag0) and 1-2 days before the arrest (lag1, lag2) and the moving average across days 0-1 (lag0-1). Conditional logistic regression was used for unadjusted and adjusted analysis for temperature and humidity. RESULTS: Independent associations of OHCA were daily concentrations of SO2 at lag1 (OR 1.173, 95%CI 1.004, 1.370; p=0.044) and lag0-1 (OR 1.203, 95%CI 1.015, 1.425; p=0.033); and daily NO concentrations at lag2 (OR 1.039, 95%CI 1.007, 1.072; p=0.016). The incidence of heart failure was significantly associated with daily concentrations of Ox on the day of the event in univariable model but not after adjustment for temperature and humidity. No associations were found for other pollutants. CONCLUSIONS: Short-term exposure to SO2 and NO are associated with an increased risk of OHCA.
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Contaminantes Atmosféricos , Contaminación del Aire , Insuficiencia Cardíaca , Paro Cardíaco Extrahospitalario , Humanos , Contaminantes Atmosféricos/efectos adversos , Contaminantes Atmosféricos/análisis , Contaminación del Aire/efectos adversos , Contaminación del Aire/análisis , Insuficiencia Cardíaca/complicaciones , Óxido Nítrico , Paro Cardíaco Extrahospitalario/epidemiología , Paro Cardíaco Extrahospitalario/etiología , Material Particulado/efectos adversos , Material Particulado/análisis , Dióxido de Azufre/efectos adversos , Dióxido de Azufre/análisis , Estudios CruzadosRESUMEN
The aim of the present study was to evaluate the usefulness of measuring whole blood coagulation with Sonoclot to predict return of spontaneous circulation (ROSC) in patients with out-of-hospital cardiopulmonary arrest (OHCA). This was a prospective, observational clinical study on patients with OHCA who were transferred to our emergency department between August 2016 and July 2018. Patients were divided into two groups: patients with return of spontaneous circulation (ROSC[+] group) and those without (ROSC[-] group). We compared the activated clotting time (ACT), clot rate (CR), and platelet function (PF) as measured with Sonoclot, and the fibrinogen degradation products (FDP) level and D-dimer level between the two groups. We analyzed 87 patients: 37 in the ROSC(+) and 50 in the ROSC(-) groups. Regarding ACT, CR, PF, FDP, and D-dimer, we used receiver operating characteristic (ROC) curves to examine how well each factor predicts ROSC. The area under the ROC curve (AUC) of CR was higher than that of the FDP and D-dimer levels. Among patients with cardiogenic cardiac arrest, the AUC of CR was higher than the AUCs of other coagulation factors. In conclusion, viscoelastic blood coagulation measurements using Sonoclot may be useful for predicting ROSC in OHCA patients.
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BACKGROUND: Out-of-hospital cardiac arrest (OHCA) patients who convert from an initial non-shockable rhythm to a subsequent shockable rhythm reportedly have a better prognosis for survival than those without rhythm conversion. We evaluated the effectiveness of extracorporeal cardiopulmonary resuscitation (ECPR) for OHCA patients with a subsequent shockable rhythm. METHODS: This study was conducted using the Japanese Association of Acute Medicine OHCA registry. We included OHCA patients with a subsequent shockable rhythm from June 2014 to December 2017. The included patients were divided into those with and without ECPR. The primary outcome was 30-day survival. Logistic regression analysis and propensity score matching were performed to compare the outcomes between patients with and without ECPR. RESULTS: A total of 2,102 patients were analyzed, consisting of 162 with ECPR and 1,940 without ECPR. Before propensity score matching, 24 (14.8%) patients with ECPR and 61 (3.1%) patients without ECPR survived for 30 days; ECPR was associated with increased survival (P < 0.05; odds ratio [OR], 5.35; 95% confidence interval [CI], 3.09-9.02). After propensity score matching, 22/149 (14.8%) patients with ECPR and 10/149 (6.7%) patients without ECPR survived for 30 days; ECPR was associated with increased survival (P < 0.05; OR, 2.40; 95% CI, 1.04-5.91). CONCLUSIONS: ECPR was associated with increased survival among OHCA patients with a subsequent shockable rhythm.
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Reanimación Cardiopulmonar , Paro Cardíaco Extrahospitalario , Humanos , Paro Cardíaco Extrahospitalario/terapia , Pronóstico , Sistema de Registros , Estudios RetrospectivosRESUMEN
A rapid response system is required in a radiotherapy department for patients experiencing a critical event when access to an emergency department is poor due to geographic location and the patient is immobilised with a fixation device. We, therefore, rebuilt the response system and tested it through onsite simulations. A multidisciplinary core group was created and onsite simulations were conducted using a Plan-Do-Study-Act cycle. We identified the important characteristics of our facility, including its distance from the emergency department; the presence of many staff with little direct contact with patients; the treatment room environment and patient fixation with radiotherapy equipment. We also examined processes in each phase of the emergency response: detecting an emergency, calling the medical emergency team (MET), MET transportation to the site and on-site response and patient transportation to the emergency department. The protocol was modified, and equipment was updated. On-site simulations were held with and without explanation of the protocol and training scenario in advance. The time for the MET to arrive at the site during a 2017 simulation prior to the present project was 7 min, whereas the time to arrive after the first simulation session was shortened to 5 min and was then shortened further to 4 min in the second session, despite no prior explanation of the situation. A multidisciplinary project for emergency response with on-site simulations was conducted at an isolated radiation facility. A carefully planned emergency response is important not only in heavy ion therapy facilities but also in other departments and facilities that do not have easy access to hospital emergency departments.
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Entrenamiento Simulado , Humanos , Transporte de PacientesRESUMEN
PURPOSE: The dynamic state of epinephrine (Ep) in the plasma of patients with out-of-hospital cardiac arrest (OHCA) remains unclear. The purpose of this study was to evaluate the relationship between the plasma levels of catecholamines (such as epinephrine (Ep), norepinephrine (Nep), and dopamine) and vasopressin (antidiuretic hormone (ADH)) and the acquisition of return of spontaneous circulation (ROSC) in OHCA patients. METHODS: This was a prospective, observational clinical study. Patients with OHCA transferred to our hospital between July 2014 and July 2017 were enrolled. The levels of catecholamines and ADH in the plasma were measured using blood samples immediately obtained on arrival at our hospital and before the administration of Ep. Patients in whom Ep was already administered prior to obtaining blood samples were excluded. Patients were divided into two groups: with and without ROSC, that is, ROSC (+) and ROSC (-) groups, respectively. The plasma levels of these agents and the conditions of resuscitation were compared between the two groups. RESULTS: A total of 96 patients with OHCA were analyzed. The ROSC (+) and ROSC (-) groups included 34 and 62 patients, respectively. There were no significant differences observed between the two groups in age, cause of cardiopulmonary arrest, and prehospital resuscitation time. The plasma levels of Ep and Nep were significantly lower in the ROSC (+) group than in the ROSC (-) group. However, there were no significant differences in the plasma levels of dopamine and ADH between the two groups. CONCLUSION: Increased levels of Ep in the plasma may not be associated with the acquisition of ROSC in patients with OHCA.
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AIM: This study evaluated whether the prehospital administered dosage of epinephrine (Ep) influences the plasma levels of catecholamines in patients with out-of-hospital cardiac arrest (OHCA). METHODS: This was a prospective, observational clinical study. Patients with OHCA transferred to our hospital between July 2014 and July 2017 were analyzed. The plasma levels of catecholamines were measured using blood samples obtained immediately upon arrival at the hospital and before the administration of Ep. Patients were divided into three groups based on the prehospital administered dosage of Ep: no prehospital administration (group Z); 1 mg of Ep (group O); and 2 mg of Ep (group T). The levels of catecholamines, as well as the conditions of resuscitation prior to and after arrival at the hospital were compared between the three groups. RESULTS: We analyzed 145 patients with OHCA (96, 38, and 11 patients in groups Z, O, and T, respectively). Group T exhibited the highest plasma levels of Ep with a statistically significant difference, however, there were no significant differences in the plasma levels of norepinephrine (Nep), dopamine (DOA) and vasopressin (ADH) among the three groups. CONCLUSION: The prehospital administered dosage of Ep influences the plasma levels of Ep; however, it does not contribute to the plasma levels of Nep, DOA and ADH in patients with OHCA.
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BACKGROUND: The thyroid ima artery (ThIA) is a rare anatomical anomaly, commonly branching from the brachiocephalic artery. Thyroid ima artery injury can cause severe mediastinal hematoma because its descending branch extends into the mediastinum. CASE PRESENTATION: A 91-year-old man presented with syncope after a motor vehicle accident. A bruise on the chest was evident. Contrast-enhanced computed tomography revealed a massive mediastinal hematoma with signs of active hemorrhage. Injury to a descending branch of the ThIA was indicated. Transcatheter arterial embolization (TAE) was successful in stopping the bleeding. CONCLUSIONS: Although a ThIA injury is rare, it can cause serious mediastinal hematoma. Thyroid ima artery injury should be considered as a cause of traumatic mediastinal hematoma. Transcatheter arterial embolization for traumatic ThIA injury is considered a safe and effective treatment.
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OBJECTIVES: We evaluated the impact of age in septic patients admitted through the ER on clinical outcome and cost. METHODS: Patients with sepsis admitted to the intensive care unit (ICU) through the emergency room in our hospital between January 2013 and December 2018 were analyzed. They were divided into three groups according to their age: <65 years (group Y); 65-79 years (group M); and ≥80 years (group E). The duration of ICU and hospital stay, prognosis, and total hospital costs were compared among the three groups. RESULTS: During this period, 1,392 patients were admitted to the ICU through the emergency room, and 174 patients with sepsis were analyzed. There were 49, 79, and 46 patients in groups Y, M, and E, respectively. There was no significant difference in ICU stay. Group E exhibited the shortest hospital stay and the lowest total hospital cost with statistically significant difference (p = 0.010 and p = 0.007, respectively). However, group E showed the highest rate of hospital mortality (30.4%) compared to groups Y and M (14.3% and 21.5%, respectively; p = 0.163). CONCLUSIONS: Elderly (aged ≥80 years) emergency patients with sepsis require shorter hospital stay and are associated with lower total hospital cost. However, it may be difficult for these patients to maintain the hospital mortality equivalent to those observed in patients aged <80 years.
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PURPOSE: To compare embolization with laparotomy for the management of hemodynamically unstable patients with solid organ injury who responded to initial resuscitation. MATERIALS AND METHODS: Data from a Japanese nationwide trauma registry were analyzed. Included were hemodynamically unstable patients (systolic blood pressure <90 mm Hg and blood transfusion within the first 24 hours) whose initial computed tomography assessment confirmed the presence of solid organ injuries (liver and/or spleen). A total of 224 patients were included (median age: 53 years, interquartile range: 32-69; 73.3% male; liver injury = 131 [58%] and spleen injury = 98 [44%]; median organ injury scale: 3, interquartile range: 3-4; median injury severity score: 19, interquartile range: 16-25). Patients who underwent embolization were compared with those who underwent laparotomy. The primary outcome was in-hospital survival. The data were evaluated using a propensity score matching analysis. RESULTS: Laparotomy and embolization were performed in 133 (59.1%) and 91 (40.4%) patients, respectively. Of those, 111 (84%) and 84 (92%) patients achieved in-hospital survival after laparotomy and embolization, respectively. No significant difference in in-hospital survival (P = .053) was noted. The propensity score matching model did not reveal a significant difference in in-hospital survival (P = .276). CONCLUSIONS: No significant difference was observed between embolization and laparotomy in terms of in-hospital survival among unstable patients who responded to initial resuscitation with solid organ injury.
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Traumatismos Abdominales , Embolización Terapéutica , Heridas no Penetrantes , Traumatismos Abdominales/terapia , Transfusión Sanguínea , Embolización Terapéutica/efectos adversos , Femenino , Humanos , Puntaje de Gravedad del Traumatismo , Hígado/diagnóstico por imagen , Hígado/lesiones , Hígado/cirugía , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Bazo/diagnóstico por imagen , Bazo/lesiones , Heridas no Penetrantes/terapiaRESUMEN
BACKGROUND: Embolization is widely used for controlling arterial hemorrhage associated with pelvic fracture. However, the effect of a delay in embolization among hemodynamically stable patients at hospital arrival with a pelvic fracture is unknown. Therefore, our aim was to investigate the association between the time to embolization and mortality in hemodynamically stable patients at hospital arrival with a pelvic fracture. METHODS: A multicenter, retrospective cohort study was undertaken using data from the Japan Trauma Data Bank between 2004 and 2018. Hemodynamically, stable patients with a pelvic fracture who underwent an embolization within 3 h were divided into six groups of 30-min blocks of time until pelvic embolization (0-30, 30-60, 60-90, 90-120, 120-150, and 150-180 min). We compared the adjusted 30-day mortality rate according to time to embolization. RESULTS: We studied 620 hemodynamically stable patients with a pelvic fracture who underwent pelvic embolization within 3 h of hemorrhage. The median age was 68 (48-79) years and 55% were male. The median injury severity score was 26 (18-38). Thirty-day mortality was 8.9% (55/620) and 24-h mortality was 4.2% (26/619). A Cochran-Armitage test showed that a 30-min delay for embolization was associated with increased 30-day (p = 0.0186) and 24-hour (p = 0.033) mortality. Mortality within 0-30 min to embolization was 0%. The adjusted 30-day mortality rate increased with delayed embolization and was up to 17.0% (10.2-23.9) for the 150-180 min group. CONCLUSION: Delayed embolization was associated with increased mortality in pelvic fracture with hemodynamic stability at hospital arrival. When you decide to embolize pelvic fracture patients, the earlier embolization may be desirable to promote improved survival regardless of hemodynamics.