Early risk factors for prolonged mechanical ventilation in patients with severe blunt thoracic trauma: A retrospective cohort study.

BACKGROUND: A significant proportion of patients with severe chest trauma require mechanical ventilation (MV). Early prediction of the duration of MV may influence clinical decisions. We aimed to determine early risk factors for prolonged MV among adults suffering from severe blunt thoracic trauma. METHODS: This retrospective, single-center, cohort study included all patients admitted between January 2014 and December 2020 due to severe blunt chest trauma. The primary outcome was prolonged MV, defined as invasive MV lasting more than 14 days. Multivariable logistic regression was performed to identify independent risk factors for prolonged MV. RESULTS: The final analysis included 378 patients. The median duration of MV was 9.7 (IQR 3.0-18.0) days. 221 (58.5 %) patients required MV for more than 7 days and 143 (37.8 %) for more than 14 days. Male gender (aOR 3.01, 95 % CI 1.63-5.58, p < 0.001), age (aOR 1.40, 95 % CI 1.21-1.63, p < 0.001, for each category above 30 years), presence of severe head trauma (aOR 3.77, 95 % CI 2.23-6.38, p < 0.001), and transfusion of >5 blood units on admission (aOR 2.85, 95 % CI 1.62-5.02, p < 0.001) were independently associated with prolonged MV. The number of fractured ribs and the extent of lung contusions were associated with MV for more than 7 days, but not for 14 days. In the subgroup of 134 patients without concomitant head trauma, age (aOR 1.63, 95 % CI 1.18-2.27, p = 0.004, for each category above 30 years), respiratory comorbidities (aOR 9.70, 95 % CI 1.49-63.01, p = 0.017), worse p/f ratio during the first 24 h (aOR 1.55, 95 % CI 1.15-2.09, p = 0.004), and transfusion of >5 blood units on admission (aOR 5.71 95 % CI 1.84-17.68, p = 0.003) were independently associated with MV for more than 14 days. CONCLUSIONS: Several predictors have been identified as independently associated with prolonged MV. Patients who meet these criteria are at high risk for prolonged MV and should be considered for interventions that could potentially shorten MV duration and reduce associated complications. Hemodynamically stable, healthy young patients suffering from severe thoracic trauma but no head injury, including those with extensive lung contusions and rib fractures, have a low risk of prolonged MV.

Association Between Admission Ionized Calcium Level and Neurological Outcome of Patients with Isolated Severe Traumatic Brain Injury: A Retrospective Cohort Study.

BACKGROUND: Traumatic brain injury (TBI) is a leading cause of death and disability worldwide. Pathophysiological processes following initial insult are complex and not fully understood. Ionized calcium (Ca++) is an essential cofactor in the coagulation cascade and platelet aggregation, and hypocalcemia may contribute to the progression of intracranial bleeding. On the other hand, Ca++ is an important mediator of cell damage after TBI and cellular hypocalcemia may have a neuroprotective effect after brain injury. We hypothesized that early hypocalcemia might have an adverse effect on the neurological outcome of patients suffering from isolated severe TBI. In this study, we aimed to evaluate the relationship between admission Ca++ level and the neurological outcome of these patients. METHODS: This was a retrospective, single-center, cohort study of all patients admitted between January 2014 and December 2020 due to isolated severe TBI, which was defined as head abbreviated injury score ≥ 4 and an absence of severe (abbreviated injury score > 2) extracranial injuries. The primary outcome was a favorable neurological status at discharge, defined by a modified Rankin Scale of 0-2. Multivariable logistic regression was performed to determine whether admission hypocalcemia (Ca++ < 1.16 mmol L-1) is an independent predictor of neurological status at discharge. RESULTS: The final analysis included 201 patients. Hypocalcemia was common among patients with isolated severe TBI (73.1%). Most of the patients had mild hypocalcemia (1 < Ca++ < 1.16 mmol L-1), and only 13 (6.5%) patients had Ca++ ≤ 1.00 mmol L-1. In the entire cohort, hypocalcemia was independently associated with higher rates of good neurological status at discharge (adjusted odds ratio of 3.03, 95% confidence interval 1.11-8.33, p = 0.03). In the subgroup of 81 patients with an admission Glasgow Coma Scale > 8, 52 (64.2%) had hypocalcemia. Good neurological status at discharge was recorded in 28 (53.8%) of hypocalcemic patients compared with 14 (17.2%) of those with normal Ca++ (p = 0.002). In multivariate analyses, hypocalcemia was independently associated with good neurological status at discharge (adjusted odds ratio of 6.67, 95% confidence interval 1.39-33.33, p = 0.02). CONCLUSIONS: Our study demonstrates that among patients with isolated severe TBI, mild admission hypocalcemia is associated with better neurological status at hospital discharge. The prognostic value of Ca++ may be greater among patients with admission Glasgow Coma Scale > 8. Trials are needed to investigate the role of hypocalcemia in brain injury.

Severely Elevated Intraocular Pressure Following Traumatic Asphyxia: A Case Report.

BACKGROUND: Traumatic asphyxia is a syndrome caused by a sudden pressure rise in the chest caused by crushing injury of the thorax or upper abdomen. It is associated with a variety of thoracic injuries, neurological symptoms, and ocular complications. CASE REPORT: We report an unusual case of traumatic asphyxia complicated by severe, sight-threatening, elevation in intraocular pressure. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: After initial stabilization, the treatment of patients with traumatic asphyxia is supportive and is mainly directed toward the accompanying injuries and complications. A complete and prompt ophthalmologic examination, including tonometry, should be an integral part of the secondary survey. This is particularly important in patients who cannot report visual impairment, such as children or unconscious patients.

Development and validation of a machine learning model predicting illness trajectory and hospital utilization of COVID-19 patients: A nationwide study.

OBJECTIVE: The spread of coronavirus disease 2019 (COVID-19) has led to severe strain on hospital capacity in many countries. We aim to develop a model helping planners assess expected COVID-19 hospital resource utilization based on individual patient characteristics. MATERIALS AND METHODS: We develop a model of patient clinical course based on an advanced multistate survival model. The model predicts the patient's disease course in terms of clinical states-critical, severe, or moderate. The model also predicts hospital utilization on the level of entire hospitals or healthcare systems. We cross-validated the model using a nationwide registry following the day-by-day clinical status of all hospitalized COVID-19 patients in Israel from March 1 to May 2, 2020 (n = 2703). RESULTS: Per-day mean absolute errors for predicted total and critical care hospital bed utilization were 4.72 ± 1.07 and 1.68 ± 0.40, respectively, over cohorts of 330 hospitalized patients; areas under the curve for prediction of critical illness and in-hospital mortality were 0.88 ± 0.04 and 0.96 ± 0.04, respectively. We further present the impact of patient influx scenarios on day-by-day healthcare system utilization. We provide an accompanying R software package. DISCUSSION: The proposed model accurately predicts total and critical care hospital utilization. The model enables evaluating impacts of patient influx scenarios on utilization, accounting for the state of currently hospitalized patients and characteristics of incoming patients. We show that accurate hospital load predictions were possible using only a patient's age, sex, and day-by-day clinical state (critical, severe, or moderate). CONCLUSIONS: The multistate model we develop is a powerful tool for predicting individual-level patient outcomes and hospital-level utilization.

Admission Rate of Patients With Major Psychiatric Disorders to the Intensive Care Unit.

BACKGROUND: Major psychiatric disorders such as major depression and schizophrenia interfere with patients' life activities and ability to function. These disorders correlate with a higher prevalence of medical and psychiatric comorbidities. OBJECTIVE: To compare the admission rate of patients with major psychiatric disorders between the intensive care unit and other departments in a tertiary care center. METHODS: In a retrospective study of records of 238 721 patients, data were collected from admission files and the intensive care unit computer system. The study group was 245 patients with psychiatric disorders admitted to the intensive care unit. Control groups were 9226 psychiatric patients in other hospital departments and 3032 nonpsychiatric patients in the intensive care unit. RESULTS: A major psychiatric disorder was diagnosed twice as often in the 3277 patients admitted to the intensive care unit as in patients admitted to other departments (7.5% vs 3.8%, P < .001). The study group had fewer male patients than did the nonpsychiatric intensive care unit group (52% vs 66%, P < .001); the age distribution was similar. Patients with a psychiatric disorder required longer stays than other intensive care unit patients. However, their mortality rate was significantly lower (8.57% vs 17.1%, P = .001). A direct correlation between the admission and a psychiatric condition was found in one-third of admissions in the study group. CONCLUSIONS: Psychiatric patients' admission rate to the intensive care unit was significantly higher than their admission rate to other departments. Their intensive care unit stays were also longer, which may increase resource use.

Early diagnosis of bloodstream infections in the intensive care unit using machine-learning algorithms.

PURPOSE: We aimed to develop a machine-learning (ML) algorithm that can predict intensive care unit (ICU)-acquired bloodstream infections (BSI) among patients suspected of infection in the ICU. METHODS: The study was based on patients' electronic health records at Beth Israel Deaconess Medical Center (BIDMC) in Boston, Massachusetts, USA, and at Rambam Health Care Campus (RHCC), Haifa, Israel. We included adults from whom blood cultures were collected for suspected BSI at least 48 h after admission. Clinical data, including time-series variables and their interactions, were analyzed by an ML algorithm at each site. Prediction ability for ICU-acquired BSI was assessed by the area under the receiver operating characteristics (AUROC) of ten-fold cross-validation and validation sets with 95% confidence intervals. RESULTS: The datasets comprised 2351 patients from BIDMC (151 with BSI) and 1021 from RHCC (162 with BSI). The median (inter-quartile range) age was 62 (51-75) and 56 (38-69) years, respectively; the median Acute Physiology and Chronic Health Evaluation II scores were 26 (21-32) and 24 (20-29), respectively. The means of the cross-validation AUROCs were 0.87 ± 0.02 for BIDMC and 0.93 ± 0.03 for RHCC. AUROCs of 0.89 ± 0.01 and 0.92 ± 0.02 were maintained in both centers with internal validation, while external validation deteriorated. Valuable predictors were mainly the trends of time-series variables such as laboratory results and vital signs. CONCLUSION: An ML approach that uses temporal and site-specific data achieved high performance in recognizing BC samples with a high probability for ICU-acquired BSI.

Pneumonia Risk in Urgently Intubated Burn Patients.

BACKGROUND: Pneumonia is a major cause of morbidity and mortality in burn patients with inhalation injuries. An increased risk of pneumonia has been demonstrated in trauma and burn patients urgently intubated in the field vs. emergency departments (EDs). OBJECTIVES: To compare intubation setting (field vs. ED) and subsequent development of pneumonia in burn patients and to evaluate the indication for urgent intubation outside the hospital setting. METHODS: A retrospective medical records review was conducted on all intubated patients presenting with thermal (study group, 118 patients) or trauma (control group A, 74 patients) injuries and admitted to the intensive care unit of a level I trauma and burn center at a single institution during a 15 year period. Control group B (50 patients) included non-intubated facial burn patients hospitalized in the plastic surgery department. RESULTS: Field intubation was less frequent (37% field vs. 63% ED), although it was more frequent in larger burns (total body surface area > 50%; 43% field vs. 27% ED). More field intubated patients developed pneumonia during hospitalization (65% field vs. 36% ED [burns]; 81% field vs. 45% ED [multi-trauma]; 2% non-intubated, P < 0.05), with a significantly higher all-cause mortality (49% field vs. 24% ED, P < 0.05) and dramatically lower rates of extubation within 3 days (7% field vs. 27% ED, P < 0.05). CONCLUSIONS: Field intubation is associated with a higher risk of subsequent development of pneumonia in burn and multi-trauma patients and should be applied with caution, only when airway patency is at immediate risk.

[THE MORBIDITY AND MORTALITY OF INFLUENZA PATIENTS TREATED AT RAMBAM MEDICAL CENTER INTENSIVE CARE UNIT IN THE YEARS 2009-2014].

INTRODUCTION: Data regarding the characteristics and results of the treatment of patients hospitalized in intensive care units (ICUs) with influenza in Israel are limited. AIMS: We evaluated the characteristics and outcomes of patients treated at Rambam Medical Center at the adult department of critical care medicine for influenza between the years 2009-2014. METHODS: A retrospective cohort study was conducted. Patients were detected by laboratory reports and data were extracted from electronic medical records. RESULTS: The study included 64 patients with laboratory-proven influenza. Median age was 54 years (range 17-83) and symptom duration before admission was 5 days (1-14). The median APACHE-II score at admission was 31.5 and 63.5% were in hemodynamic shock mandating the use of vasopressors. All patients received mechanical ventilation. Inhalation of nitric oxide was needed in a third; 14.3% needed Intra-Pulmonary Percussive Ventilation and steroids were given to 57.1%. ICU mortality was 24/64 (37.5%). Factors significantly associated with mortality were older age, longer length of disease prior to ICU admission, APACHE-II score, septic shock and creatinine. Mortality during the last season was lower than observed during the 2009 pandemia despite increasing severity of illness. CONCLUSIONS: The appearance of a new strain of influenza leads to high morbidity, complications and mortality due to low population immunity. There are no randomized controlled trials evaluating the efficacy of anti-viral drugs and other treatments in severe Influenza with complications. DISCUSSION: The treatment of critically-ill patients with severe influenza is complex, mandates advanced techniques of mechanical ventilation and hemodynamic support. Under intense supportive care most patients with influenza survive.

Temporal trends in patient characteristics and survival of intensive care admissions with sepsis: a multicenter analysis*.

OBJECTIVE: To estimate in-hospital, 1-yr, and long-term mortality and to assess time trends in incidence and outcomes of sepsis admissions in the intensive care unit. DESIGN: A population-based, multicenter, retrospective cohort study. PATIENTS: Patients hospitalized with sepsis in the intensive care unit in seven general hospitals in Israel during 2002-2008. INTERVENTIONS: None. MEASUREMENTS: Survival data were collected and analyzed according to demographic and background clinical characteristics, as well as features of the sepsis episode, using Kaplan-Meier approach for long-term survival. MAIN RESULTS: A total of 5,155 patients were included in the cohort (median age: 70, 56.3% males; median Charlson comorbidity index: 4). The mean number of intensive care unit admissions per month increased over time, while no change in in-hospital mortality was observed. The proportion of patients surviving to hospital discharge was 43.9%. The 1-, 2-, 5-, and 8-yr survival rates were 33.0%, 29.8%, 23.3%, and 19.8%, respectively. Mortality was higher in older patients, patients with a higher Charlson comorbidity index, and those with multiorgan failure, and similar in males and females. One-year age-standardized mortality ratio was 21-fold higher than expected, based on the general population rates. CONCLUSIONS: Mortality following intensive care unit sepsis admission remains high and is correlated with underlying patients' characteristics, including age, comorbidities, and the number of failing organ systems.

Antibiotic prescription and cost patterns in a general intensive care unit.

UNLABELLED: Antibiotic prescription habits, cost pattern, and the prospective intervention in an Intensive Care Unit were analyzed. METHODS: Data on antibiotic utilization and costs were collected prospectively from individual electronic charts from August 2003 to January 2004, and retrospectively from August to December 2002. RESULTS: A total of 180 and 107 patients were surveyed in 2002 and 2003. In 2002, Piperacillin-Tazobactam (13.8%) and Imipenem/Cilastin (11.2%) were the most prescribed medications; while, in 2003, Vancomycin (12.6%) and Imipenem/Cilastin (11.3%) were prescribed, respectively. Total defined daily dose (DDD) and Drug Utilization 90% (DU90%) index for 2002 and 2003 were 2031.15 and 2325.90 DDDs (p>0.1) and 1777.57 and 2079.61 DU90%, respectively (p>0.1). The Median Total Cost /100 admission days (CI 95%) were NIS13,310 (11,110;18,420) and NIS13,860 (6,710;18,020) (p=0.66), respectively. CONCLUSIONS: Interventional programs should focus on promoting infectious control with rational antibiotic prescription aimed at minimizing the future emergence of bacterial resistance and futile expenses.

Percutaneous dilation tracheotomy versus surgical tracheotomy: our experience.

BACKGROUND: Percutaneous dilation tracheotomy (PDT) is becoming a popular alternative to surgical tracheotomy. In our department, we recently adopted the use of the PDT in intensive care unit patients. Here, we compare the results of the use of these 2 techniques on 150 patients, all performed by the same surgeon. We discuss the pros and cons of PDT and present our experience with the technique compared with surgical tracheotomy (ST). MATERIALS AND METHODS: A prospective study of 75 PDTs and a retrospective study of 75 surgical tracheotomies (ST) were performed at the Department of Otolaryngology-Head and Neck Surgery, Rambam Medical Center, Haifa, Israel. Age, sex, duration of intubation before surgery, time interval between the decision to perform and the performance of tracheotomy, and cost were compared. RESULTS: One hundred fifty tracheotomies were reviewed. The indication for tracheotomy in both groups was prolonged mechanical ventilation. Seven patients were found unsuitable for PDT and underwent ST. Complications included 3 cases of mild postoperative hemorrhage in the ST group, and 1 case of subcutaneous emphysema, 1 case of stomal cellulitis and 2 cases of mild postoperative hemorrhage in the PDT group. The average waiting interval was between 2 to 5 days for ST and 1 to 24 hours for PDT. The intraoperative time for ST was 20 minutes; for PDT, 5 minutes. The cost was 565 dollars for ST and 274 dollars for PDT. CONCLUSIONS: PTD provides an easy, less expensive, and convenient alternative to ST and should be added to the otolaryngologists' armamentarium of surgical airway procedures. The procedure is advantageous for the patient. Complication rates of both techniques are similar and low; however, PDT is a blind technique of obtaining a surgical airway and therefore holds more potential for serious complications. It is our conclusion that this technique is suitable for many, but not all, critical care patients and that the procedure should be performed only by surgeons who are capable of urgently obtaining a surgical airway or exploring the neck should the PDT fail.