Use of the Trauma Embolic Scoring System (TESS) to predict symptomatic deep vein thrombosis and fatal and non-fatal pulmonary embolism in severely injured patients.

Fatal pulmonary embolism is the third most common cause of death after major trauma. We hypothesised that the Trauma Embolic Scoring System (TESS) would have adequate calibration and discrimination in a group of severely injured trauma patients in predicting venous thromboembolism (VTE), and could be used to predict fatal and non-fatal symptomatic pulmonary embolism. Calibration and discrimination of the TESS were assessed by the slope and intercept of the calibration curve and the area under the receiver operating characteristic curve, respectively. Of the 357 patients included in the study, 74 patients (21%) developed symptomatic VTE after a median period of 14 days following injury. The TESS predicted risks of VTE were higher among patients who developed VTE than those who did not (14 versus 9%, P=0.001) and had a moderate ability to discriminate between patients who developed VTE and those who did not (area under the receiver operating characteristic curve 0.71, 95% confidence interval 0.65 to 0.77). The slope and intercept of the calibration curve were 2.76 and 0.34, respectively, suggesting that the predicted risks of VTE were not sufficiently extreme and overall, underestimated the observed risks of VTE. Using 5% predicted risk of VTE as an arbitrary cut-point, TESS had a high sensitivity and negative predictive value (both ≥0.97) in excluding fatal and non-fatal pulmonary embolism. The TESS had a reasonable ability to discriminate between patients who developed VTE and those who did not and may be useful to select different strategies to prevent VTE in severely injured patients.

Increased mortality with undertriaged patients in a mature trauma center with an aggressive trauma team activation system.

PURPOSE: The American College of Surgeons Committee on Trauma (ACS-COT) has determined that a 5 % pre-hospital undertriage [UT; defined as Injury Severity Score (ISS) > 15 and not sent to a trauma center] is an acceptable rate for pre-hospital transfer to a non-trauma center. We sought to determine if this level of undertriage is acceptable within a mature Level II trauma center as a measure of the adequacy of its trauma activation system. METHODS: Our trauma activation system encompasses anatomic, physiologic, and mechanism of injury criteria. We defined UT as ISS > 15 and no trauma activation. All UT patients during the period 2000-2010 were compared to properly triaged patients (CT). The variables examined were mortality, emergency department (ED) length of stay (LOS), hospital LOS, complications, Coumadin use, and age >64 years. RESULTS: There were 18,324 patients admitted, with 1,156 (6.3 %) UT. UT is associated with an increase in mortality [odds ratio (OR) 3.0; 95 % confidence interval (CI) 2.4-3.8; p < 0.001), longer ED LOS (OR 54.5; 95 % CI 45.5-63.5; p < 0.001), and longer hospital LOS (OR 1.7; 95 % CI 1.4-2.1; p < 0.001). In addition, UT patients had a two-fold increase in complications (OR 2.0; 95 % CI 1.6-2.5; p < 0.001). When controlling for age ≥65 years, Revised Trauma Score (RTS) > 7.0, and one or more co-morbidities, UT patients had 2.18 times higher odds of mortality than their CT counterparts (OR 2.18; 95 % CI 1.57-3.01; p < 0.001). Patients on pre-hospital Coumadin (OR 3.61; 95 % CI 3.04-4.30; p < 0.001) and age >64 years (OR 4.93; 95 % CI 4.36-5.58; p < 0.001) were significant predictors of being undertriaged. A p-value ≤ 0.05 was considered to be significant. CONCLUSIONS: Standard trauma activation criteria may not be adequate to identify the at-risk severely injured trauma patient. Further refinement of in-house trauma triage protocols is necessary if trauma centers are to improve outcomes following trauma.

Inguinal hernia repair in a community setting: implications for the elderly.

OBJECTIVE: Inguinal hernia repair is thought to be a relatively low morbidity operation. This study examined whether this tenet hold true in patients who are elderly with significant comorbidity. DESIGN: Case series. Retrospective review of a prospectively collected database. SETTING: Single surgeon practicing in Vermont over a period of 9 years. PATIENTS: Consecutive sample of 2,145 inguinal herniorraphies in 1,889 patients. INTERVENTION: Patients underwent an open inguinal hernia repair with mesh placement. A total of 81% of the repairs were performed under local anesthesia with intravenous sedation. MAIN OUTCOME MEASURE: Presence of comorbid conditions and complications were compared between patients younger and older than 65 years. RESULTS: A total of 2,145 herniorraphies were performed on 1,889 patients (1,646 in younger patients and 499 in older patients). Hernia repairs in older patients were more likely associated with comorbid conditions than in their younger counterparts (74 vs 39%; OR = 4.55, P < 0.0001). Specifically, hypertension (26 vs 9%; OR = 3.5, P < 0.0001), coronary artery disease (34 vs 6%; OR = 8.4, P < 0.0001) and benign prostatic hypertrophy (26 vs 4%; OR = 8.2, P < 0.0001) were more commonly present in older individuals. The commonest postoperative complications in both groups were recurrence (3%), hematoma (1%) and nerve entrapment (1%). There were no deaths. There was no significant difference in the rate of postoperative complications (6 vs 7%; OR = 0.95, P = 0.88) or recurrence rates (2 vs 3%; OR = 0.82, P = 0.65) between groups. CONCLUSION: Inguinal herniorrhaphy under local anesthesia is a safe operation with a high success rate in the elderly. Patients with significant comorbidities are not at higher risk of complications or recurrences.

The use of telemedicine for real-time video consultation between trauma center and community hospital in a rural setting improves early trauma care: preliminary results.

BACKGROUND: By geographic necessity, rural trauma patients must be initially stabilized at local community hospitals before transfer for definitive care. In this study, it was hypothesized that telemedicine consults with trauma surgeons from a Level I trauma center online while the patient was still in the community hospital ED could positively affect care. METHODS: Four community hospital emergency departments in upstate New York and Vermont were equipped with dual cameras with remote control capability. Three trauma surgeons' homes were wired and equipped with telemedicine systems. Protocols were developed for the initiation of a telemedicine consult. RESULTS: There were 26 telemedicine consults over an 8-month period. The telemedicine population was significantly more severely injured and had a higher mortality than the general trauma population admitted to the Level I trauma center. In two cases, it was felt that the telemedicine consultation was potentially lifesaving. On follow-up, more than 80% of the referring providers felt that the telemedicine consult improved care. CONCLUSION: Telemedicine provides a virtual online trauma surgeon to assist with the resuscitation and stabilization of the major trauma patient in a small community hospital. These preliminary results show a positive impact on rural trauma patient care at the local community hospital.

A strangulated Spigelian hernia mimicking diverticulitis.

Spigelian hernias are true interparietal hernias that are frequently not associated with a palpable mass and, as such, are not frequently diagnosed before surgery. Reported herein, is the serendipitous discovery of an incarcerated Spigelian hernia that was discovered on a CT scan being performed for presumed diverticulitis.

Chest radiographs of limited utility in the diagnosis of blunt traumatic aortic laceration.

BACKGROUND: The radiographic diagnosis of blunt traumatic aortic laceration (BTAL) remains problematic. We reviewed our experience with chest radiographic signs of BTAL at a single trauma center. METHODS: The chest radiographs of 188 consecutive blunt trauma patients with suspected BTAL who underwent portable chest radiography and aortography were retrospectively reviewed by a thoracic radiologist. The presence or absence of 15 radiographic findings were recorded, and the sensitivity and specificity of individual radiographic signs and combinations of signs were determined. RESULTS: There were 10 patients with BTAL. Although three signs showed greater than 90% sensitivity for BTAL, these signs showed low specificity, and no significant improvement in overall accuracy was achieved by combining radiographic findings. CONCLUSION: The experience at our institution suggests that chest radiographs have limited utility in the accurate diagnosis of blunt traumatic aortic laceration. Cross-sectional imaging techniques will likely become the preferred imaging procedures for evaluating patients with suspected BTAL.

A population-based study of geriatric trauma in a rural state.

BACKGROUND: Urban geriatric trauma patients are known to die more often than their younger counterparts. Little is known of the fate of geriatric trauma patients in a rural environment where delays to definitive treatment are frequent. We hypothesized that rural trauma patients would do worse than their urban counterparts because of prolonged delays to definitive care. METHODS: Five-year retrospective analysis of all trauma deaths occurring within a rural state and retrospective outcome analysis of trauma patients admitted to a tertiary care facility who were less than 55 years old (defined as young) and 55 or more years old (defined as old). Outcome analysis was performed comparing old and young rural hospitalized patients to the Major Trauma Outcome Study data set collected in major urban trauma centers. RESULTS: Of the total trauma deaths in the state, 32.5% were old. Old patients were less likely to die at the scene of the injury than were their younger counterparts (R2 = 0.84, p < 0.001). Hospitalized old patients had a significantly higher mean Revised Trauma Score and a significantly lower Injury Severity Score, a higher complication rate, and a higher mortality rate than did hospitalized young patients. The young group had a significantly better survival (W = 0.59, Z = -3.49, p = 0.0001) than the MTOS data set, but the old group had a significantly worse survival (W = -1.8, Z = -3.49, p = 0.001). CONCLUSION: In a rural environment, old trauma patients die more commonly in the hospital than their younger counterparts, who die more commonly at the scene. Old trauma patients who die in the hospital were less severely injured than their younger counterparts who died in the hospital. Old patients admitted to this rural trauma center have a significantly worse survival than their urban counterparts despite the fact that young rural trauma patients do significantly better than their urban counterparts. Understanding the demographics of rural geriatric trauma may be useful in allocating resources in rural trauma system design. It must be understood that despite relatively low injury severity and physiologic stability, there is a significant potential for rural geriatric trauma patients to do poorly.

Population-based study of hospital trauma care in a rural state without a formal trauma system.

OBJECTIVE: Formalized systems of trauma care are believed to improve outcomes in an urban setting, but little is known of the applicability in a rural setting. METHODS: We conducted a population-based analysis of hospital survival after trauma comparing an American College of Surgeons-verified Level I trauma center (TC) with the pooled results of 13 small community hospitals (CH) in a rural state with no formal trauma system. All patients admitted to any hospital within the state of Vermont over a 5-year period (1995-1999) with a trauma discharge diagnosis were included. Elderly patients with isolated femur fractures were excluded from the database. International Classification of Diseases Injury Severity Scores (ICISSs) were calculated for each patient and used to control for injury severity in an omnibus logistic regression model that included age, ICISS, and hospital type (TC vs. CH) as predictors of survival. Patients who died were characterized on the basis of ICISS into "expected" (ICISS < 0.25), "indeterminate" (ICISS = 0.26-0.50), and "unexpected" (ICISS > 0.5). RESULTS: In 16,354 trauma admissions over the 5-year period in the rural state of Vermont, 370 (2.2%) died. There were 5,964 (36%) admitted to TC. Patients admitted to TC were more injured (ICISS 0.94 vs. 0.96) and had a higher mortality (3.1% vs. 1.8). Overall, care at the CH provided an improved survival (odds ratio = 1.75, 95% confidence internal = 1.31-2.18, p = 0.000). However, in the more severely injured cohort of trauma patients (expected and indeterminate; n = 133), overall survival was higher in the TC (16% CH vs. 38% TC, p = 0.02, chi2). Because the TC was known to provide care equivalent to Major Trauma Outcome Study norms during this time period (Z = -0.03, M = 0.894), we believe this study confirms that trauma care throughout the state is in accordance with national norms. CONCLUSION: In a rural state, without a statewide formal trauma system, survival after trauma is no worse at CH than TC when corrected for injury severity and age. Future expenditures of resources might better be concentrated in other areas such as discovery or prehospital care to further improve outcomes.

Do pediatric trauma centers have better survival rates than adult trauma centers? An examination of the National Pediatric Trauma Registry.

BACKGROUND: Pediatric trauma centers (PTCs) were developed to improve the survival of injured children, but it is currently unknown if children admitted to PTCs are more likely to survive than those admitted to adult trauma centers (ATCs). METHODS: Fifty-three thousand one hundred thirteen pediatric trauma cases from 22 PTCs and 31 ATCs included in the National Pediatric Trauma Registry were reviewed to evaluate survival rates at PTCs and ATCs. RESULTS: Overall, 1,259 children died. The raw mortality rate was lower at PTCs (1.81% of 32,554 children) than at ATCs (3.88% of 18,368 children). However, patients admitted to ATCs were more severely injured. When Injury Severity Score, Pediatric Trauma Score, mechanism (blunt or penetrating), gender, age, clustering, and American College of Surgeons (ACS) verification status were controlled for using a single logistic regression model, there was no statistically significant difference in survival between PTCs and ATCs (odds ratio, 1.02; 95% confidence interval, 0.83-1.26; p = 0.587). A similar comparison of the 12 ACS-verified trauma centers with the 41 nonverified centers showed verification to be associated with improved survival (odds ratio, 0.75; 95% confidence interval, 0.58-0.97; p = 0.013). CONCLUSION: Although PTCs have higher overall survival rates than ATCs, this difference disappears when the analysis controls for Injury Severity Score, Pediatric Trauma Score, age, mechanism, and ACS verification status. ACS-verified centers have significantly higher survival rates than do unverified centers.

Nonoperative management of hepatic, splenic, and renal injuries in adults with multiple injuries.

BACKGROUND: Nonoperative management (NOM) of abdominal solid organ (ASO; liver, spleen, kidney) injuries from blunt trauma in adults has gained acceptance, but multisystem trauma remains a relative contraindication to NOM. METHODS: We reviewed the charts of 126 adult patients who underwent NOM of an ASO injury for success of NOM, transfusions, and complications. Patients were divided into two groups: group I had isolated ASO injuries (n = 48); group II had an ASO injury and at least one additional injury with an Abbreviated Injury Score > or = 2 (n = 78). RESULTS: NOM was successful 89.6% of group I and 93.6% of group II patients (p = 0.55). Group II had higher Injury Severity Scores (20.7 +/- 9.8 vs. 8.3 +/- 4.9 p < 0.05) and transfusion requirements (30.8% vs. 14.6%,p < 0.05) than group I. Complication rates were not different (group I, 20.8% vs. 26.9% group II, p = 0.58). CONCLUSION: NOM of ASO injuries may attempted in adult patients with multiple injuries without increased morbidity.

A multi-institutional study of factors associated with fetal death in injured pregnant patients.

HYPOTHESIS: Factors associated with fetal death in injured pregnant patients are related to increasing injury severity and abnormal maternal physiologic profile. DESIGN: A multi-institutional retrospective study of 13 level I and level II trauma centers from 1992 to 1996. MAIN OUTCOME MEASURE: Fetal survival. RESULTS: Of 27,715 female admissions, there were 372 injured pregnant patients (1.3%); 84% had blunt injuries and 16% had penetrating injuries. There were 14 maternal deaths (3.8%) and 35 fetal deaths (9.4%). The population suffering fetal death had higher injury severity scores (P<.001), lower Glascow Coma Scale scores (P<.001), and lower admitting maternal pH (P = .002). Most women who lost their fetus arrived in shock (P = .005) or had a fetal heart rate of less than 110 beats/min at some time during their hospitalization (P<.001). An Injury Severity Score greater than 25 was associated with a 50% incidence of fetal death. Placental abruption was the most frequent complication, occurring in 3.5% of patients and associated with 54% mortality. Cardiotrophic monitoring to detect potentially threatening fetal heart rates was performed on only 61% of pregnant women in their third trimester. Of these patients, 7 had abnormalities on cardiotrophic monitoring and underwent successful cesarean delivery. CONCLUSIONS: Fetal death was more likely with greater severity of injury. Cardiotrophic monitoring is underused in injured pregnant patients in their third trimester even after admission to major trauma centers. Increased use of cardiotrophic monitoring may decrease the mortality caused by placental abruption.

Rural trauma: the challenge for the next decade.

Improving the care of trauma patients in a rural environment requires that several important issues be addressed. First, a universal definition of what constitutes "rural" must be established. We propose that a combined effort of the Federal Government and the Committee on Trauma of the American College of Surgeons develop this definition. Second, data on rural trauma demographics and outcome must be collected in a national database. We propose that this database be incorporated in the "TRACS" database of the Committee on Trauma of the American College of Surgeons. Such a database will allow a "needs assessment analysis of existing care in rural environments and facilitate planning and implementation of efficient systems of care. Funding for the rural database should come from the federal government. Finally, increased public awareness of problems unique to rural trauma care is necessary. The rural trauma subcommittee of the ACSCOT should go from an ad hoc committee to a standing committee with the American College of Surgeons Committee on Trauma. We propose a national conference on rural trauma care hosted by the federal government for the purpose of addressing these issues and simultaneously increasing public awareness.

Focused abdominal sonogram for trauma: the learning curve of nonradiologist clinicians in detecting hemoperitoneum.

BACKGROUND: The focused abdominal sonogram for trauma (FAST) has been used by surgeons and emergency physicians (CLIN) to screen reliably for hemoperitoneum after trauma. Despite recommendations for "appropriate training," ranging from 50 to 400 proctored examinations, there are no supporting data. METHODS: We prospectively examined the initial FAST experience of CLIN in detecting hemoperitoneum by using diagnostic peritoneal lavage, computed tomography, and clinical findings as the diagnostic "gold standard." RESULTS: 241 patients had FAST performed by 12 CLIN (average, 20/CLIN; range, 2-43); 51 patients (21.2%) had hemoperitoneum and 17 patients (7.1%) required laparotomy. Initial experience with FAST by CLIN produced 35 true positives, 180 true negatives, 16 false negatives, and 3 false positives; sensitivity, 68%; specificity, 98%. Initial error rate was 17%, which fell to 5% after 10 examinations (chi2; p < 0.05). CONCLUSION: Previous recommendations for the number of proctored examinations for individual nonradiologist clinician sonographers to develop competence are excessive.

Computed tomographic angiography as a screening modality for blunt cervical arterial injuries: preliminary results.

BACKGROUND: The diagnosis of blunt cervical arterial injury (CAI) is made difficult by its infrequent occurrence and delayed presentation. Beginning in January of 1995, we used computed tomographic angiography (CTA) of the neck to screen for CAI. We hypothesized that CTA could be incorporated into the workup of patients sustaining blunt neck injury as a screening modality for CAI and that CTA would increase the early detection of CAI. METHODS: Retrospective review of all CAI for the years January of 1988 to June of 1997 at a Level I trauma center. CAI diagnosed before introduction of CTA (pre-CTA; January of 1988 to December of 1994) were compared with those after (post-CTA; January of 1995 to June of 1997). RESULTS: The overall incidence of CAI for the entire time period was 0.11%. Motor vehicle crash (53%) was the most common mechanism, with focal neurologic deficit (23%) or seizures (17.6%) the most common presenting clinical symptoms. CTA added only a few additional minutes to the time required for the workup of patients sustaining blunt neck injury in whom CAI was suspected. The incidence of CAI increased from 0.06% pre-CTA to 0.19% post-CTA (p = 0.02; Fisher exact test). CTA was associated with a decrease in mean time to make the diagnosis of CAI (156 hours pre-CTA vs. 5.9 hours post-CTA). In addition, CTA was associated with a decrease in the incidence of permanent neurologic sequelae from CAI (50% pre-CTA vs. 0% post-CTA; p = 0.07; Fisher exact test). CONCLUSION: We conclude that CTA does not significantly increase the time of the diagnostic workup of the patient with injuries caused by blunt trauma. The introduction of CTA at our institution was associated with an increase in the detection rate of CAI. Earlier detection of CAI may allow for more timely therapeutic intervention and potentially prevent permanent neurologic sequelae.

Financial aspects of providing trauma care at the extremes of life.

BACKGROUND: Children and the elderly are more likely to be underinsured compared with the general population of trauma patients. We performed financial analysis on all trauma patients admitted during an 18-month period to a Level I adult and pediatric trauma center to evaluate the financial impact of providing trauma care for children and the elderly. METHODS: Patients were categorized by age: PEDI<17 years, GERI>64 years and MID = 17 to 64 years. Reimbursement ratio (RR = reimbursement/cost; RR>1 = profit, RR<1 = loss), length of stay (LOS), and Injury Severity Score (ISS) were calculated for each age group. RESULTS: RR for GERI (RR = 0.99) was significantly lower than for PEDI (RR = 1.15) and MID (RR = 1.16). There was no difference in ISS, but the LOS of GERI was greater than that of PEDI and MID (p<0.05). Cost per patient and LOS were less in PEDI versus MID and GERI (p<0.05). CONCLUSION: Trauma care reimbursement for the elderly is inadequate, whereas pediatric trauma care costs less to deliver and is profitable to the trauma center.

Study of the outcome of patients transferred to a level I hospital after stabilization at an outlying hospital in a rural setting.

OBJECTIVE: To determine the characteristics and outcome of transferred trauma patients in a rural setting. METHODS: We conducted a case-control study of all trauma admissions to a rural Level I trauma center to examine a 3.5-year (1993-1996) comparison of trauma patients admitted directly with those transferred (RTTP) after being initially stabilized at an outlying hospital. We used prehospital times, Injury Severity Score (ISS), LD50ISS (the ISS at which 50% of patients died), Revised Trauma Score, probability of survival, Acute Physiology and Chronic Health Evaluation II, and observed survival as main outcome measures. RESULTS: RTTPs (39.4%) spent an average of 182+/-139 minutes at the outlying hospital and 72+/-42 minutes in transport to the trauma center. Proportionately more head/neck and patients with multiple injuries composed the RTTP group. The RTTP were more severely injured (ISS 11.1+/-8.5; Acute Physiology and Chronic Health Evaluation II 16.2+/-5.8; Revised Trauma Score 7.44+/-1.1) than the trauma patients admitted directly (ISS 7.9+/-5.3; Acute Physiology and Chronic Health Evaluation II 13.1+/-6.3; Revised Trauma Score 7.8+/-0.4; p < 0.05). However, both groups had the same LD50ISS (ISS = 35). When logistic regression was applied with death as the dependent variable, both ISS and age contributed significantly (p = 0.0001) but transfer status did not (p = 0.473). CONCLUSION: Rural trauma centers admit a high percentage of RTTP. These RTTP have a higher injury severity and acuity than their trauma patients admitted directly counterparts. Trauma care in rural areas that involves initial stabilization at outlying hospitals does not adversely affect mortality.