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ABSTRACT: BACKGROUND: Transmediastinal gunshot wounds are associated with a high mortality and frequently require operative intervention. The purpose of this study was to identify the diagnostic and therapeutic challenges of these injuries in a mature trauma system with decreasing prehospital time intervals. METHODS: Patients admitted to a large urban Level 1 trauma centre between 1/2006 and 12/2010 sustaining a firearm injury to the torso were identified. Transmediastinal gunshot wounds were defined as missile tracts traversing the mediastinum identified on CT images, operative notes or autopsy reports. RESULTS: Overall, 133 patients met study criteria. A total of 116 patients (87.2%) were haemodynamically unstable or had no vital signs on arrival to the Emergency Department. Ninety-seven (83.6%) of these patients required a resuscitative thoracotomy resulting in 8 survivors (6.0%). There were 17 haemodynamically stable patients (12.8%) identified, 14 of whom underwent CT scan evaluation. Six patients subsequently required operative intervention. Only 11 patients (8.3%) in the study population were successfully managed nonoperatively. The overall mortality was 78.9%, and for those who reached the hospital with vital signs, the mortality was 24.3%. CONCLUSIONS: Transmediastinal gunshot wounds encountered in a mature trauma centre are highly lethal injuries requiring resuscitative thoracotomy in most instances. Changing perspectives in these injuries may reflect the effects of an evolving prehospital care.
Injury 01/2013; · 1.98 Impact Factor
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ABSTRACT: Needle thoracostomy is an emergent procedure designed to relieve tension pneumothorax. High failure rates because of the needle not penetrating into the thoracic cavity have been reported. Advanced Trauma Life Support guidelines recommend placement in the second intercostal space, midclavicular line using a 5-cm needle. The purpose of this study was to evaluate placement in the fifth intercostal space, midaxillary line, where tube thoracostomy is routinely performed. We hypothesized that this would result in a higher successful placement rate.
Twenty randomly selected unpreserved adult cadavers were evaluated. A standard 14-gauge 5-cm needle was placed in both the fifth intercostal space at the midaxillary line and the traditional second intercostal space at the midclavicular line in both the right and left chest walls. The needles were secured and thoracotomy was then performed to assess penetration into the pleural cavity. The right and left sides were analyzed separately acting as their own controls for a total of 80 needles inserted into 20 cadavers. The thickness of the chest wall at the site of penetration was then measured for each entry position.
A total of 14 male and 6 female cadavers were studied. Overall, 100% (40 of 40) of needles placed in the fifth intercostal space and 57.5% (23 of 40) of the needles placed in the second intercostal space entered the chest cavity (p < 0.001); right chest: 100% versus 60.0% (p = 0.003) and left chest: 100% versus 55.0% (p = 0.001). Overall, the thickness of the chest wall was 3.5 cm ± 0.9 cm at the fifth intercostal space and 4.5 cm ± 1.1 cm at the second intercostal space (p < 0.001). Both right and left chest wall thicknesses were similar (right, 3.6 cm ± 1.0 cm vs. 4.5 cm ± 1.1 cm, p = 0.007; left, 3.5 ± 0.9 cm vs. 4.4 cm ± 1.1 cm, p = 0.008).
In a cadaveric model, needle thoracostomy was successfully placed in 100% of attempts at the fifth intercostal space but in only 58% at the traditional second intercostal position. On average, the chest wall was 1 cm thinner at this position and may improve successful needle placement. Live patient validation of these results is warranted.
The Journal of trauma 11/2011; 71(5):1099-103; discussion 1103. · 2.48 Impact Factor
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ABSTRACT: The objective of this study was to identify the incidence and patterns of thoracic aortic injuries in a series of blunt traumatic deaths and describe their associated injuries.
All autopsies performed by the Los Angeles County Department of Coroner for blunt traumatic deaths in 2005 were retrospectively reviewed. Patients who had a traumatic thoracic aortic (TTA) injury were compared with the victims who did not have this injury for differences in baseline characteristics and patterns of associated injuries.
During the study period, 304 (35%) of 881 fatal victims of blunt trauma received by the Los Angeles County Department of Coroner underwent a full autopsy and were included in the analysis. The patients were on average aged 43 years±21 years, 71% were men, and 39% had a positive blood alcohol screen. Motor vehicle collision was the most common mechanism of injury (50%), followed by pedestrian struck by auto (37%). A TTA injury was identified in 102 (34%) of the victims. The most common site of TTA injury was the isthmus and descending thoracic aorta, occurring in 67 fatalities (66% of the patients with TTA injuries). Patients with TTA injuries were significantly more likely to have other associated injuries: cardiac injury (44% vs. 25%, p=0.001), hemothorax (86% vs. 56%, p<0.001), rib fractures (86% vs. 72%, p=0.006), and intra-abdominal injury (74% vs. 49%, p<0.001) compared with patients without TTA injury. Patients with a TTA injury were significantly more likely to die at the scene (80% vs. 63%, p=0.002).
Thoracic aortic injuries occurred in fully one third of blunt traumatic fatalities, with the majority of deaths occurring at the scene. The risk for associated thoracic and intra-abdominal injuries is significantly increased in patients with thoracic aortic injuries.
The Journal of trauma 01/2011; 70(1):197-202. · 2.48 Impact Factor
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ABSTRACT: The objective of this study was to analyze autopsy findings after blunt traumatic deaths to identify the incidence of cardiac injuries and describe the patterns of associated injuries.
All autopsies performed by the Los Angeles County Forensic Medicine Division for blunt traumatic deaths in 2005 were retrospectively reviewed. Only cases that underwent a full autopsy including internal examination were included in the analysis. The study population was divided into two groups according to the presence or absence of a cardiac injury and compared for differences in baseline characteristics and types of associated injuries.
Of the 881 fatal victims of blunt trauma received by the Los Angeles County Forensic Medicine Division, 304 (35%) underwent a full autopsy with internal examination and were included in the analysis. The mean age was 43 years +/- 21 years, patients were more often men (71%) and were intoxicated in 39% of the cases. The most common mechanism was motor vehicle collision (50%), followed by pedestrian struck by auto (37%), and 32% had a cardiac injury. Death at the scene was significantly more common in patients with a cardiac injury (78% vs. 65%, p = 0.02). The right chambers were the most frequently injured (30%, right atrium; 27%, right ventricle). Among the 96 patients with cardiac injuries, 64% had transmural rupture. Multiple chambers were ruptured in 26%, the right atrium in 25%, and the right ventricle in 20% of these patients. Patients with cardiac injuries were significantly more likely to have other associated injuries: thoracic aorta (47% vs. 27%, p = 0.001), hemothorax (81% vs. 59%, p < 0.001), rib fractures (91% vs. 71%, p < 0.001), sternum fracture (32% vs. 13%, p < 0.001), and intra-abdominal injury (77% vs. 48%, p < 0.001) compared with patients without cardiac injury. Of the 96 patients with a cardiac injury, 78% died at the scene of the crash and 22% died en route or at the hospital.
Cardiac injury is a common autopsy finding after blunt traumatic fatalities, with the majority of deaths occurring at the scene. Patients with cardiac injuries are at significantly increased risk for associated thoracic and intra-abdominal injuries.
The Journal of trauma 12/2009; 67(6):1259-64. · 2.48 Impact Factor
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ABSTRACT: The objective of this study was to analyze the preventable and potentially preventable deaths occurring at a mature Level I trauma center.
All trauma patients that died during their initial hospital admission during an 8-year period (January, 1998 to December, 2005) were analyzed. The deaths were initially reviewed at a weekly Morbidity and Mortality (M&M) conference followed by a multidisciplinary (Trauma Surgery, Critical Care, Emergency Medicine, Neurosurgery, Nursing, and Coroner) Combined Trauma Death Review Committee, and were classified into nonpreventable, potentially preventable, and preventable deaths. All preventable and potentially preventable deaths were identified for the purpose of the study. Quality improvement death forms included data on epidemiology, vital signs, injury severity, type of injury, probability of survival with Trauma and Injury Severity Score methodology, preventability (nonpreventable, potentially preventable, and preventable deaths), errors in the evaluation and management of the patient, and classification of errors (system, judgment, knowledge). Additional injury details, clinical course, circumstances leading to the death and autopsy findings were abstracted from the trauma registry and individual chart review.
During the study period, 35,311 patients meeting trauma registry criteria were admitted and a total of 2,081 (5.9%) deaths occurred. Fifty-one deaths were classified as preventable or potentially preventable deaths (0.1% of admissions, 2.5% of deaths). Eleven of them (0.53% of deaths) were classified as preventable and 40 (1.92% of deaths) as potentially preventable deaths. Mean age was 40 years, 66.7% were men, mean Injury Severity Score was 27, 74.5% were blunt. The most common cause of death was bleeding (20, 39.2%) followed by multiple organ dysfunction syndrome (14, 27.5%) and cardiorespiratory arrest (8, 15.6%). This was caused by a delay in treatment (27, 52.9%), clinical judgment error (11, 21.6%), missed diagnosis (6, 11.8%), technical error (4, 7.8%), and other (3, 5.9%). The deaths peaked at two time periods: 26 (51.1%) during the first 24 hours and 16 (31.4%) after 7 days. Only one patient (2.0%) died in the first hour. The most common location of death was the intensive care unit (28, 54.9%), operating room (13, 25.5%), and emergency room (5, 9.8%).
Preventable or potentially preventable deaths are rare but do occur at an academic Level I trauma center. Delay in treatment and error in judgment are the leading causes of preventable and potentially preventable deaths.
The Journal of trauma 01/2008; 63(6):1338-46; discussion 1346-7. · 2.48 Impact Factor
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ABSTRACT: In the U.S. today, the pathologists, both hospital-based and forensic, are regularly involved in quality assurance (QA) programs, the evaluation of patient safety at all levels of medical care, including treatments in walk-in clinics and medical offices. In the United States, official death investigations are conducted by the Medical Examiner's Office. The Medical Examiner's Office is aided in its work by a network of coordinating agencies to provide complete, comprehensive reporting and investigation of deaths placed under its jurisdiction. Those agencies are the Health Department, the Registrar of Vital Statistics on Births and Deaths, Division of Health Facilities, the Hospital Office of Decedent Affairs and the State medical licensing agencies, as well as the various law enforcement and regulatory agencies and the prosecuting attorney's office. Forensic pathologists are witnesses to the fatal results of often avoidable untoward events. They need to use their experiences to address and emphasize overall prevention programs to improve the quality of life in the community, to publicize the avoidable actions which can lead to untoward results. In the current growing atmosphere of threatening chemical, biological and radiation terrorist attacks, the health care system, especially hospitals, including emergency services, are mobilizing to develop plans to meet possible anticipated need for disaster preparedness.
Legal Medicine 04/2007; 9(2):71-5.
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ABSTRACT: In the United States, the office of the Medical Examiner-Coroner is responsible for investigating all sudden and unexpected deaths and deaths by violence. Its jurisdiction includes deaths during the arrest procedures and deaths in police custody. Police officers are sometimes required to subdue and restrain an individual who is violent, often irrational and resisting arrest. This procedure may cause harm to the subject and to the arresting officers. This article deals with our experiences in Los Angeles and reviews the policies and procedures for investigating and determining the cause and manner of death in such cases. We have taken a "quality improvement approach" to the study of these deaths due to restraint asphyxia and related officer involved deaths, Since 1999, through interagency coordination with law enforcement agencies similar to the hospital healthcare quality improvement meeting program, detailed information related to the sequence of events in these cases and ideas for improvements to prevent such deaths are discussed.
Legal Medicine 04/2007; 9(2):88-93.
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ABSTRACT: Long distance airplanes hijacked by terrorists suddenly struck the World Trade Center in New York City on September 11, 2001. The city responded with efficient emergency service and there were a number of learning points for future planning. Early activation of the Disaster Mortuary Operation Response Team (DMORT) provided efficient family assistance by setting up a comprehensive Information Database Center and assisted the Medical Examiner in identifying the deceased. DMORT is a federally funded emergency service, made up of volunteer medical examiners and mortuary personnel, which responds to assist the local medical examiners in just such overwhelming emergency situations. We had been warned that Los Angeles was targeted as a probable site for similar attacks by terrorist groups. In response, Los Angeles has setup a far more advanced response system, the Coroner's Special Operation Response Team (SORT). SORT consists of over ten specialized units, one of which is the Weapons of Mass Destruction (WMD) Unit, staffed by qualified personnel, which provide continuing training, using standard procedures, drills and maintenance of many specialized protective equipment. Current urgent preparedness training includes the plans for maintaining government business continuity, safe keeping of electronic records, handling of multiple, widely spread fatalities through wrap, tag and hold program at multiple sites, using body bag, tag and hold procedure. Staff recruitment and training, development of equipment with the newly designed mobile facility for long range storage and field operation is an ongoing process in order to be able to respond effectively to any disaster. We still need expansion of training and equipment for handling cases of exposure to chemicals, biologic agents, radiation and nuclear energy. Plans in process are to have integration with DMORT and establish advance geographic information system, accomplished through the internet, and provide field reporting, commands and resource coordination in real time.
Nihon hōigaku zasshi = The Japanese journal of legal medicine 11/2005; 59(2):141-8.
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ABSTRACT: During this past half century, there has been remarkable increase in the role of forensic pathologists and medical examiners in the determination of cause and manner of deaths in health care facilities and investigations of quality of patient care. Autopsy data are an essential part of this quality assurance (QA) program in patient care, especially in trauma centers' QA programs. Forensic pathologists participate in evaluating appropriateness of patient care where death occurs during or following therapeutic and diagnostic procedures. Continuous quality improvement programs now extend into data sharing in child and elder abuse, monitoring of defective medical devices and consumer products which contributed to deaths. In recent years, forensic pathologists are increasingly requested directly by family members to conduct private autopsies to provide independent opinions as to quality of patient care. Thus forensic pathologists are contributing expertise to an ever widening circle of influence in prevention of unnecessary deaths with quality assurance programs and peer review processes.
Medicine and law 10/2005; 24(3):535-47.
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Thomas T Noguchi
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ABSTRACT: This is a review article dealing with the half-century evolution of the quality assurance program to improve patient care in the United States. The author attempted to point out some differences in approach to solving the medical error and medical malpractice problems between Japan and the U.S. In the 1970s, an increase in the medical malpractice claims resulted in such high premiums for medical liability insurance that it threatened the healthcare system in the U.S. Urgent legislative remedy, the Medical Injury Compensation Reform Act (MICRA) was put into place in the State of California. This act was the beginning of the definitive quality improvement in our health care system. It was followed by other improvement programs, such as the National Practitioner Data Bank (NPDB) for tracking physicians with malpractice judgments or settlements against them, or who have problems with the medical licensing Board or other impairments. By comparison, in recent years, in Japan, there has been a rash of medical malpractice claims, similar to the situation in the U.S. in the 1970's. The two pronged approach to maintaining and assuring quality health care are: (1) Set standards by inspection and accreditation of hospitals and healthcare facilities and (2) by credentialing and peer review program to assure the competency of the physicians and other healthcare personnel. Clinical medicine has made a major effort in setting up a quality assurance program and so has forensic medicine. Similar approaches have been used in both programs. The current emphasis in forensic medicine is on inspection and accreditation of the medical examiner and coroner's offices by the National Association of Medical Examiners (NAME) and re-certification for the medical license and specialty board and credentialing and peer review activities.
Nihon hōigaku zasshi = The Japanese journal of legal medicine 10/2002; 56(2-3):205-18.
