Myths and Misinformation About Gunshot Wounds may Adversely Affect Proper Treatment.

BACKGROUND: Poorly designed experiments and popular media have led to multiple myths about wound ballistics. Some of these myths have been incorporated into the trauma literature as fact and are included in Advanced Trauma Life Support (ATLS). We hypothesized that these erroneous beliefs would be prevalent, even among those providing care for patients with gunshot wounds (GSWs), but could be addressed through education. METHODS: ATLS course content was reviewed. Several myths involving wound ballistics were identified. Clinically relevant myths were chosen including wounding mechanism, lead poisoning, debridement, and antibiotic use. Subsequently, surgery and emergency medicine services at three different trauma centers were studied. All three sites were busy, urban trauma centers with a significant amount of penetrating trauma. A pre-test was administered prior to a lecture on wound ballistics followed by a post-test. Pre- and post-test scores were compared and correlated with demographic data including ATLS course completion, firearm/ballistics experience, and years of post-graduate medical experience (PGME). RESULTS: One-hundred and fifteen clinicians participated in the study. A mean pre-test score of 34 % improved to 78 % on the post-test with associated improvements in all areas of knowledge (p < 0.001). Years of PGME correlated with higher pre-test score (p = 0.021); however, ATLS status did not (p = 0.774). CONCLUSIONS: Erroneous beliefs involving wound ballistics are prevalent even among clinicians who frequently treat victims of GSWs and could lead to inappropriate treatment. Focused education markedly improved knowledge. The ATLS course and manual promulgate some of these myths and should be revised.

Does autotransfusion from a contaminated trauma laparotomy field increase the risk of complications?

BACKGROUND: Autotransfusion (AT) in trauma laparotomy is limited by concern that enteric contamination (EC) increases complications, including infections. Our goal was to determine if AT use increases complications in trauma patients undergoing laparotomy with EC. METHODS: Trauma patients undergoing laparotomy from October 2011-November 2020 were reviewed. Patients were excluded if they did not receive blood in the operating room, did not have a full thickness hollow viscus injury, or died <24 h from admission. AT and non-AT patients were matched. Outcomes were compared. RESULTS: 185 patients were included, 60 received AT, and 46 pairs were matched. After matching, demographics were similar. No differences were noted in septic complications (33 vs 41%, p = 0.39), overall complications (59% vs 54%, p = 0.67), or mortality (13 vs 6%, p = 0.29). CONCLUSIONS: AT use in contaminated trauma laparotomy fields was not associated with a higher rate of complications.

Percutaneous tracheostomy: to bronch or not to bronch--that is the question.

BACKGROUND: Percutaneous tracheostomy is a routine procedure in the intensive care unit (ICU). Some surgeons perform percutaneous tracheostomies using bronchoscopy believing that it increases safety. The purpose of this study was to evaluate percutaneous tracheostomy in the trauma population and to determine whether the use of a bronchoscope decreases the complication rate and improves safety. METHODS: A retrospective review was completed from January 2007 to November 2010. Inclusion criteria were trauma patients undergoing percutaneous tracheostomy. Data collected included age, Abbreviated Injury Score by region, Injury Severity Score, ventilator days, and outcomes. Complications were classified as early (occurring within <24 hours) or late (>24 hours after the procedure). RESULTS: During the study period, 9,663 trauma patients were admitted, with 1,587 undergoing intubation and admission to the ICU. Tracheostomies were performed in 266 patients and 243 of these were percutaneous; 78 (32%) were performed with the bronchoscope (Bronch) and 168 (68%) without bronchoscope (No Bronch). There were no differences between the groups in Abbreviated Injury Score by region, Injury Severity Score, probability of survival, ventilator days, and length of ICU or overall hospital stay. There were 16 complications, 5 (Bronch) and 11 (No Bronch). Early complications were primarily bleeding (Bronch 3% vs. No Bronch 4%, not statistically significant). Late complications included tracheomalacia, tracheal granulation tissue, bleeding, and stenosis; Bronch 4% versus No Bronch 3%, (not statistically significant). One major complication occurred, with loss of airway and cardiac arrest, in the bronchoscopy group. CONCLUSION: Percutaneous tracheostomy was safely and effectively performed by an experienced surgical team both with and without bronchoscopic guidance with no difference in the complication rates. This study suggests that the use of bronchoscopic guidance during tracheostomy is not routinely required but may be used as an important adjunct in selected patients, such as those with HALO cervical fixation, obesity, or difficult anatomy.

Prehospital hypotension in blunt trauma: identifying the "crump factor".

BACKGROUND: Trauma activation for prehospital hypotension in blunt trauma is controversial. Some patients subsequently arrive at the trauma center normotensive, but they can still have life-threatening injuries. Admission base deficit (BD)≤-6 correlates with injury severity, transfusion requirement, and mortality. Can admission BD be used to discriminate those severely injured patients who arrive normotensive but "crump," (i.e., become hypotensive again) in the Emergency Department? The purpose is to determine whether admission BD<-6 discriminates patients at risk for future bouts of unexpected hypotension during evaluation. METHODS: Retrospective chart review was performed on all blunt trauma admissions at a Level I trauma center from August 2002 through July 2007. Hypotension was defined as a systolic blood pressure≤90 mm Hg. Patients who were hypotensive in the field but normotensive upon arrival in the emergency department (ED) were included. Age, gender, injury severe score, arterial blood gas analysis, results of focused abdominal sonogram for trauma (FAST), computed tomography, intravenous fluid administration, blood transfusions, and the presence of repeat bouts of hypotension were noted. Patients were stratified by BD≤-6 or ≥-5. Statistical analysis was performed using paired t test, χ, and logistic regression analysis with significance attributed to p<0.05. RESULTS: During the 5-year period, 231 blunt trauma patients had hypotension in the field with subsequent normotension on admission to the ED. Of these, 189 patients had admission BD data recorded. Patients with a BD≤-6 were significantly more likely to have repeat hypotension (78% vs. 30%, p<0.001). Overall mortality was 13% (24 of 189), but patients with repeat hypotension had greater mortality (24% vs. 5%, p<0.003). CONCLUSION: Blunt trauma patients with repeat episodes of hypotension have significantly greater mortality. Patients with transient field hypotension and a BD≤-6 are more than twice as likely to have repeat hypotension (crump). This study reinforces the need for early arterial blood gases and trauma team involvement in the evaluation of these patients. Patients with BD≤-6 should have early invasive monitoring, liberal use of repeat FAST exams, and careful resuscitation before computed tomography scanning. Surgeons should have a low threshold for taking such patients to the operating room.

Mortality in hypotensive trauma patients requiring laparotomy is related to degree of hypotension and provides evidence for focused interventions.

BACKGROUND: Mortality in hypotensive patients requiring laparotomy is reported to be 46% and essentially unchanged in 20 years. Resuscitative endovascular balloon occlusion of the aorta (REBOA) has been incorporated into resuscitation protocols in an attempt to decrease mortality, but REBOA can have significant complications and its use in this patient group has not been validated. This study sought to determine the mortality rate for hypotensive patients requiring laparotomy and to evaluate the mortality risk related to the degree of hypotension. Additionally, this study sought to determine if there was a presenting systolic blood pressure (SBP) that was associated with a sharp increase in mortality to target the appropriate patient group most likely to benefit from focused interventions such as REBOA. METHODS: The trauma registry at a level I trauma center was reviewed for patients undergoing emergent laparotomy from January 2007 to June 2020. Data included demographics, mechanism of injury, physiological data, Injury Severity Score, blood products transfused, and outcomes. Group comparisons were based on initial SBP (0 to 50 mm Hg, 60 to 69 mm Hg, 70 to 79 mm Hg, 80 to 89 mm Hg, and ≥90 mm Hg). RESULTS: During the study period, 52 016 trauma patients were treated and 1174 required laparotomy within 90 min of arrival; 424 had an initial SBP of <90 mm Hg. The overall mortality rate was 18%, but mortality increased as SBP decreased (≥90=9%, 80 to 89=20%, 70 to 79=21%, 60 to 69=48%, 0 to 59=66%). Mortality increased sharply with SBP of <70 mm Hg. DISCUSSION: Mortality rate increases with worsening hypotension and increases sharply with an SBP of <70 mm Hg. Further study on focused interventions such as REBOA should target this patient group. LEVEL OF EVIDENCE: Therapeutic/care management, level III.

Gastrobronchial Fistula after Robotic Repair of Traumatic Diaphragmatic Hernia.

Gastrobronchial fistulas are a rare occurrence in the literature. We report a case of a gastrobronchial fistula after robotic repair of a chronic traumatic diaphragmatic hernia. The patient had severe respiratory symptoms with multiple studies that were inconclusive. The fistula was ultimately discovered after an esophagogastroduodenoscopy (EGD). The patient underwent a left thoracotomy for takedown of his fistula and eventually recovered. Earlier EGD and a lower threshold for differential that included this diagnosis would have led to an earlier identification and treatment of a rare disease process.

Intercostal Nerve Block with Liposomal Bupivacaine vs Epidural Analgesia for the Treatment of Traumatic Rib Fracture.

BACKGROUND: Rib fractures are common among trauma patients and analgesia remains the cornerstone of treatment. Intercostal nerve blocks provide analgesia but are limited by the duration of the anesthetic. This study compares outcomes of epidural analgesia with intercostal nerve block using liposomal bupivacaine for the treatment of traumatic rib fractures. METHODS: A retrospective chart review was used to identify patients who received either epidural analgesia or intercostal nerve block with liposomal bupivacaine for the treatment of traumatic rib fractures. Patients were matched in a 1:1 ratio on age, Injury Severity Score, and number of rib fractures. Outcomes included intubations, mechanical ventilation days, ICU length of stay (LOS), hospital LOS, and mortality. RESULTS: After matching, 116 patients were included in the study. Patients receiving intercostal nerve blocks with liposomal bupivacaine were less likely to require intubation (3% vs 17%; p = 0.015), had shorter hospital LOS (mean ± SD 8 ± 6 days vs 11 ± 9 days; p = 0.020) and ICU LOS (mean ± SD 2 ± 5 days vs 5 ± 6 days; p = 0.007). There were no differences in ventilator days or mortality. Minor complications occurred in 26% of patients that received an epidural catheter for rib fractures. No complications occurred in the patients receiving intercostal nerve block. CONCLUSIONS: Patients who received intercostal nerve blocks with liposomal bupivacaine required intubation less frequently and had shorter ICU and hospital LOS compared with epidural analgesia patients. These results suggest that intercostal nerve blocks with liposomal bupivacaine might be equal or superior to epidural analgesia.

Prospective evaluation of admission cortisol in trauma.

BACKGROUND: A low cortisol level has been shown to occur soon after trauma, and is associated with increased mortality. The purpose of this study was to investigate the impact of low cortisol levels in acute critically ill trauma patients. We hypothesized that patients would require increase vasopressor use, have a greater blood product administration, and increased mortality rate. METHODS: A blinded, prospective observational study was performed at an American College of Surgeons verified Level I trauma center. Adult patients who met trauma activation criteria, received initial treatment at Community Regional Medical Center and were admitted to the intensive care unit were included. Total serum cortisol levels were measured from the initial blood draw in the emergency department. Patients were categorized according to cortisol ≤15 µg/dL (severe low cortisol, SLC), 15.01-25 µg/dL (relative low cortisol, RLC), or >25 µg/dL (normal cortisol, NC) and compared on demographics, injury severity score, initial vital signs, blood product usage, vasopressor requirements, and mortality. RESULTS: Cortisol levels were ordered for 280 patients; 91 were excluded and 189 were included. Penetrating trauma accounted for 19% of injuries and blunt trauma for 81%. 22 patients (12%) had SLC, 83 (44%) had RLC, and 84 (44%) had NC. This study found patients with admission SLC had higher rates of vasopressor requirements, required more units of blood, and had a higher mortality rate than both the RLC and NC groups. CONCLUSION: Low cortisol level can be identified acutely after severe trauma. Trauma patients with SLC had larger blood product requirements, vasopressor use, and increase mortality. Initial cortisol levels are useful in identifying these high-risk patients. LEVEL OF EVIDENCE: Prognostic/epidemiologic study, level III.

Changes in splenic capsule with aging; beliefs and reality.

BACKGROUND: Research describing the splenic capsule and its effect on non-operative management of splenic injuries is limited. The aim of this study is to identify the current beliefs about the splenic capsule thickness and investigate changes in the splenic capsule with age. METHODS: Trauma Medical Directors were surveyed on their beliefs regarding splenic capsule thickness changes with age. Thicknesses of cadaveric splenic capsule samples were measured. RESULTS: The majority of trauma medical directors (59%) believe the capsule thickness decreases with age. There were 94 splenic specimens obtained. The splenic capsules of infants were thin and had a uniform layer of elastin fibers. With aging, the capsule becomes thick and develops a collagen layer. CONCLUSION: Most trauma directors believe the splenic capsule thickness decreases with age. However, our results demonstrate that the splenic capsule thickness increases during childhood but remains constant in adulthood.

Admission base deficit is superior to lactate in identifying shock and resuscitative needs in trauma patients.

BACKGROUND: Base Deficit (BD) and lactate have been used as indicators of shock and resuscitation. This study was done to evaluate the utility of BD and lactate in identifying shock and resuscitative needs in trauma patients. METHODS: A prospective observational study was performed from 3/2014-12/2018. Data included demographics, admission systolic BP, ISS, BD, lactate, blood transfusion, and outcomes. BD and lactate were modeled continuously and categorically and compared. RESULTS: 2271 patients were included. BD and lactate were moderately correlated (r2 = 0.63 p < 0.001). On univariate regression, BD and lactate were associated with transfusion requirement and mortality (p < 0.001), but on multivariate regression, only BD was associated with transfusion requirement and mortality (OR = 1.2, p < 0.001; OR = 1.1, p < 0.001, respectively). BD discriminated better than lactate for hypotension, higher ISS, increased transfusion requirements and mortality. CONCLUSIONS: Admission BD and lactate levels are correlated following injury, but BD is superior to lactate in identifying shock, resuscitative needs and mortality in severely injured trauma patients.

A predictive grading scale for acute cholecystitis.

BACKGROUND: Acute cholecystitis presents in a spectrum of severity, where acute disease may be complicated by severe inflammation, gangrene, and perforation. The goal of this study is to outline an evidence-based grading scale that predicts patient outcomes after laparoscopic cholecystectomy (LC). METHODS: A retrospective review of all patients with a preoperative diagnosis of acute cholecystitis who underwent LC from August 2011 until June 2015 at a tertiary-level hospital was performed. Patients who underwent elective cholecystectomy, incidental cholecystectomy, a planned open cholecystectomy, had gallstone pancreatitis or choledocholithiasis, and those admitted to a non-surgical service were excluded. Severity of disease was obtained from operative and pathology reports, and patients were classified according to the following grading scale:Grade I: symptomatic cholelithiasis.Grade II: acute/chronic cholecystitis.Grade III: gangrenous/necrotizing cholecystitis.Grade IV: gallbladder perforation or abscess.The groups were compared on age, gender, body mass index, severity of gallbladder disease, presence of preoperative systemic inflammatory response syndrome, hospital length of stay, length of operation, complications within 30 days, conversion to open rate, and cost of hospitalization. RESULTS: During the study period, 1252 patients who underwent laparoscopic cholecystectomy were analyzed; 677 met inclusion criteria. The most common grade was grade 2, which was present in 80% of patients, followed by grade 3, which was found in 16% of patients. Grade 4 cholecystitis occurred in 1.2% of patients and grade 1 occurred in 3.2% of patients. There were statistically significant increases in age, presence of preoperative systemic inflammatory response syndrome, hospital length of stay, conversion to open rate, cost of hospitalization, and length of operation with increased cholecystitis grade. CONCLUSIONS: The proposed grading scale is an accurate predictor of duration of operation, conversion to open rate, hospital length of stay, and cost of hospitalization. LEVEL OF EVIDENCE: III. STUDY TYPE: Prognostic.

Attempting to validate the overtriage/undertriage matrix at a Level I trauma center.

BACKGROUND: The Optimal Resources Document mandates trauma activation based on injury mechanism, physiologic and anatomic criteria and recommends using the overtriage/undertriage matrix (Matrix) to evaluate the appropriateness of trauma team activation. The purpose of this study was to assess the effectiveness of the Matrix method by comparing patients appropriately triaged with those undertriaged. We hypothesized that these two groups are different, and Matrix does not discriminate the needs or outcomes of these different groups of patients. METHODS: Trauma registry data, from January 2013 to December 2015, at a Level I trauma center, were reviewed. Overtriage and undertriage rates were calculated by Matrix. Patients with Injury Severity Score (ISS) of 16 or greater were classified by activation level (full, limited, consultation), and triage category by Matrix. Patients in the limited activation and consultation groups were compared with patients with full activation by demographics, injuries, initial vital signs, procedures, delays to procedure, intensive care unit admission, length of stay, and mortality. RESULTS: Seven thousand thirty-one patients met activation criteria. Compliance with American College of Surgeons tiered activation criteria was 99%. The Matrix overtriage rate was 45% and undertriage was 24%. Of 2,282 patients with an ISS of 16 or greater, 1,026 were appropriately triaged (full activation), and 1,256 were undertriaged. Undertriaged patients had better Glasgow Coma Scale score, blood pressure, and base deficit than patients with full activation. Intensive care unit admission, hospital stays, and mortality were lower in the undertriaged group. The undertriaged group required fewer operative interventions with fewer delays to procedure. CONCLUSION: Despite having an ISS of 16 or greater, patients with limited activations were dissimilar to patients with full activation. Level of activation and triage are not equivalent. The American College of Surgeons Committee on Trauma full and tiered activation criteria are a robust means to have the appropriate personnel present based on the available prehospital information. Evaluation of the process of care, regardless of level of activation, should be used to evaluate trauma center performance. LEVEL OF EVIDENCE: Therapeutic and care management, level III.

Cervical spinal cord injury and the need for cardiovascular intervention.

HYPOTHESIS: The level of cervical spinal cord injury (CSCI) can be used to predict the need for a cardiovascular intervention. DESIGN: Retrospective review. Data included level of spinal cord injury, Injury Severity Score, lowest heart rate, and systolic blood pressure in the first 24 hours and intensive care unit course. The level of CSCI was divided into high (cord level C1-C5) or low (cord level C6-C7). Neurogenic shock was defined as bradycardia with hypotension. Statistical analysis was performed with the t test and the chi2 test. SETTING: Level I trauma center. PATIENTS: The patients studied were those with quadriplegia who experienced a CSCI and were admitted to the hospital between December 1, 1993, and October 31, 2001. INTERVENTIONS: Pressors, chronotropic agents, and pacemakers.Main Outcome Measure Use of a cardiovascular intervention in the presence of neurogenic shock. RESULTS: Eighty-three patients met the criteria for CSCI and quadriplegia, 62 in the high (C1-C5) and 21 in the low (C6-C7) level. There was no significant difference between the 2 groups in mean +/- SD age (38.2+/-17.8 vs 34.7+/-15.6 years; P=.43), mean +/- SD Injury Severity Score (35.7+/-17.5 vs 32.5+/-11.2; P=.44), mean +/- SD admission base deficit (-0.7+/-3.6 vs 0.7+/-2.7; P=.06), or mortality (12 [19%] of 62 patients vs 2 [10%] of 21 patients; P=.29). Neurogenic shock was present in 19 (31%) of the 62 patients with high CSCI and in 5 (24%) of the 21 patients with low CSCI (P=.56). There was a marked difference in the use of a cardiovascular intervention between those with a high and those with a low CSCI: 15 (24%) of 62 patients vs 1 (5%) of 21 patients (P=.02). Two patients with C1 through C5 spinal cord injuries required cardiac pacemakers. CONCLUSIONS: There was no significant difference in the frequency of neurogenic shock by injury level. Patients with a high CSCI (C1-C5) had a significantly greater requirement for a cardiovascular intervention compared with patients with lower injuries (C6-C7).

An acute care surgery fellowship benefits a general surgical residency.

BACKGROUND: There has been a trend toward subspecialization among general surgery graduates, and many subspecialists are reticent to participate in trauma care. This has resulted in a gap in the provision of emergency surgical care. The Acute Care Surgery (ACS) fellowship, incorporating trauma, critical care, and emergency general surgery, was developed to address this need. One of the most important aspects in establishing these ACS fellowships is that they do not detract from the existing general surgery residents' experience. METHODS: The operative case logs for residents and fellows were compared for the number of resident cases during the 3 years before the ACS fellowship and during the 3 years after the fellowship was established. Surveys were distributed to the general surgery residents addressing the impact of the fellows from the resident's perspective at the end of the 2011 to 2012 academic year. RESULTS: There was no significant change in the number of total cases; total chief resident cases; and trauma, thoracic, or vascular procedures done per graduate. A decrease in the number of liver cases performed by the residents was noted but includes the increase in resident complement as well as the fellowship. ACS fellow cases increased from 172 cases in the first year to 221 cases in the second year and 295 in the third year. The survey showed that the residents had a very positive response to having the fellow as a teacher and did not feel like their operative experience was compromised with the addition of the ACS fellowship. CONCLUSION: The ACS fellow did not compromise general surgery resident experience and was regarded as an asset to the resident's education. An ACS fellowship can be beneficial to residents and fellows. LEVEL OF EVIDENCE: Care management study, level IV.

Isolated free fluid on abdominal computed tomography in blunt trauma: watch and wait or operate?

BACKGROUND: Isolated free fluid (FF) on abdominal CT in stable blunt trauma patients can indicate the presence of hollow viscus injury. No criteria exist to differentiate treatment by operative exploration vs observation. The goals of this study were to determine the incidence of isolated FF and to identify factors that discriminate between patients who should undergo operative exploration vs observation. STUDY DESIGN: A review of blunt trauma patients at a Level I trauma center from July 2009 to March 2012 was performed. Patients with a CT showing isolated FF after blunt trauma were included. Data collected included demographics, injury severity, physical examination, CT, and operative findings. RESULTS: Two thousand eight hundred and ninety-nine patients had CT scans, 156 (5.4%) of whom had isolated FF. The therapeutic operative group included 13 patients; 9 had immediate operation and 4 failed nonoperative management. The nonoperative/nontherapeutic operation group consisted of 142 patients with successful nonoperative management and 1 patient with a nontherapeutic operation. Abdominal tenderness was documented in 69% of the therapeutic operative group and 23% of the nonoperative/nontherapeutic group (odds ratio = 7.5; p < 0.001). The presence of a moderate to large amount of FF was increased in the therapeutic operative group (85% vs 8%; odds ratio = 66; p < 0.001). CONCLUSIONS: Isolated FF was noted in 5.4% of stable blunt trauma patients. Blunt trauma patients with moderate to large amounts of FF without solid organ injury on CT and abdominal tenderness should undergo immediate operative exploration. Patients with neither of these findings can be safely observed.

Post-extubation dysphagia in trauma patients: it's hard to swallow.

BACKGROUND: There is a significant incidence of unrecognized postextubation dysphagia in trauma patients. The purpose of this study was to evaluate the incidence, ascertain the risk factors, and identify patients with postextubation dysphagia who will require clinical swallow evaluation. METHODS: A prospective observational study was performed on 270 trauma patients. Bedside clinical swallow evaluation was done within 24 hours of extubation. Logistic regression analysis was used to adjust for confounding variables. RESULTS: The incidence of oropharyngeal dysphagia (OD) in our study was 42%. Ventilator days was the strongest independent risk factor for OD (3.6 vs 8.0, P < .001). The odds ratio showed a 25% risk for OD for each additional ventilator day. Silent aspiration was found in 37% of patients with OD. CONCLUSIONS: Trauma patients requiring mechanical ventilation for ≥2 days are at increased risk for dysphagia and should undergo routine swallow evaluations after extubation.