Early warning: End-tidal carbon dioxide is associated with central venous oxygenation under continuous cardiorespiratory monitoring in a porcine model of hemorrhagic shock and resuscitation

BACKGROUND

End-tidal carbon dioxide (ETCO2) has previously shown promise as a predictor of shock severity and mortality in trauma. ETCO2 monitoring is non-invasive, real-time, and readily available in prehospital settings, but the temporal relationship of ETCO2 to systemic oxygen transport has not been thoroughly investigated in the context of hemorrhagic shock.

METHODS

A validated porcine model of hemorrhagic shock and resuscitation was used in male Yorkshire swine (N ​= ​7). Both ETCO2 and central venous oxygenation (SCVO2) were monitored and recorded continuously in addition to other traditional hemodynamic variables.

RESULTS

Linear regression analysis showed that ETCO2 was associated with ScvO2 both throughout the experiment (β ​= ​1.783, 95% confidence interval (CI) [1.552-2.014], p ​< ​0.001) and during the period of most rapid hemorrhage (β ​= ​4.896, 95% CI [2.416-7.377], p ​< ​0.001) when there was a marked decrease in ETCO2.

CONCLUSIONS

ETCO2 and ScvO2 were closely associated during rapid hemorrhage and continued to be temporally associated throughout shock and resuscitation.

Intercostal nerve cryoablation during surgical stabilization of rib fractures decreases post-operative opioid use, ventilation days, and intensive care days

BACKGROUND

Intercostal nerve cryoablation is an adjunctive measure that has demonstrated pain control, decrease in opioid consumption, and decrease in hospital length of stay (LOS) in patients who undergo surgical stabilization of rib fractures (SSRF).

METHODS

SSRF patients from January 2015 to September 2021 were retrospectively compared. All patients received multimodal pain regimens post-operatively and the independent variable was intraoperative cryoablation.

RESULTS

241 patients met inclusion criteria. 51 (21%) underwent intra-operative cryoablation during SSRF and 191 (79%) did not. Patients with standard treatment consumed 9.4 more daily MME (p = 0.035), consumed 73 percent more post-operative total MME (p = 0.001), spent 1.55 times as many days in the intensive care unit (p = 0.013), and spent 3.8 times as many days on the ventilator than patients treated with cryoablation, respectively. Overall hospital LOS, operative case time, pulmonary complications, MME at discharge, and numeric pain scores at discharge were no different (all p>0.05).

CONCLUSION

Intercostal nerve cryoablation during SSRF is associated with fewer ventilator days, ICU LOS, total post-operative, and daily opioid use without increasing time in the operating room or perioperative pulmonary complications.

The Association of the Affordable Care Act With Medicaid Enrollment Status and Costs of Care at a Level I Trauma Center in a Medicaid Non-expansion State

INTRODUCTION

The intended purpose of the Patient Protection and Affordable Care Act (ACA) was to expand access to health care insurance for all Americans. In our study, we examine the association of Medicaid enrollment status, health care outcomes, and financial outcomes for trauma patients at a level I urban trauma center in a state that did not expand Medicaid coverage under the ACA.

METHODS

We retrospectively reviewed trauma admissions from 2011 to 2016, via the trauma registry (n = 36,250). A subgroup of Medicaid patients (n = 8840) was identified and compared for changes in selected variables and demographics following ACA implementation. The association of Medicaid payor status, by 3 year average pre-ACA (n = 3516) and post-ACA (n = 3324), on patient outcomes, payments collected, and accrued costs of care were analyzed.

RESULTS

Three-year Medicaid median actual payments decreased 7.5% following implementation of the ACA ($4072 vs. $3767, P < .01). In contrast, the Medicaid median total cost of care increased 23% ($3964 vs. $4882, P < .01). The rate of patients insured by Medicaid decreased (24.0% vs. 16.2%, P<.001). Patients were admitted longer (1 d vs. 2 d, P < .01), and more injured (ISS 5 vs. 6, P < .01).

DISCUSSION

Medicaid payor status under the ACA was associated with a decrease in actual payments and an increase in total cost of care. Moreover, the divergence in actual payments collected with the increased total cost of care warrants examination to ascertain the root cause in efforts to reduce this widening gap.

Timing of venous thromboembolism chemoprophylaxis using objective hemoglobin criteria in blunt solid organ injury

BACKGROUND

The purpose of this study was to evaluate the safety and efficacy of early venous thromboembolism (VTE) chemoprophylaxis following blunt solid organ injury.

METHODS

A retrospective review of patients was performed for patients with blunt solid organ injury between 2009-2019. Enoxaparin was initiated when patients had <1g/dl Hemoglobin decline over a 24 h period. These patients were then categorized by initiation: ≤48 h and >48 h.

RESULTS

There were 653 patients: 328 (50.2%) <48 h and 325 (49.8%) ≥48 h. Twenty-nine (4.4%) developed VTE. Patients in ≥48 h group suffered more frequent VTE events (6.5% vs 2.4%, p = 0.021). Non-operative failure occurred in 6 patients (1.9%) in ≥48 h group, and 5 patients (1.5%) < 48 h group. Blood transfusion following chemophrophylaxis initiation was required in 69 (21.3%) in ≥48 h group, and 46 (14.0%) in < 48 h group, occurring similarly between groups (p=0.021).

CONCLUSION

Stable hemoglobin in the first 24 h is an efficacious, objective measure that allows early initiation of VTE chemoprophylaxis in solid organ injury. This practice is associated with earlier initiation of and fewer VTE events.

Emergencies do not shut down during a pandemic: COVID pandemic impact on Acute Care Surgery volume and mortality at a level I trauma center

BACKGROUND

The aim of this study was to evaluate the impact of the COVID-19 pandemic on volume and outcomes of Acute Care Surgery patients, and we hypothesized that inpatient mortality would increase due to COVID+ and resource constraints.

METHODS

An American College of Surgeons verified Level I Trauma Center's trauma and operative emergency general surgery (EGS) registries were queried for all patients from Jan. 2019 to Dec. 2020. April 1st, 2020, was the demarcation date for pre- and during COVID pandemic. Primary outcome was inpatient mortality.

RESULTS

There were 14,460 trauma and 3091 EGS patients, and month-over-month volumes of both remained similar (p > 0.05). Blunt trauma decreased by 7.4% and penetrating increased by 31%, with a concomitant 25% increase in initial operative management (p < 0.001). Despite this, trauma (3.7%) and EGS (2.9-3.0%) mortality rates remained stable which was confirmed on multivariate analysis; p > 0.05. COVID + mortality was 8.8% and 3.7% in trauma and EGS patients, respectively.

CONCLUSION

Acute Care Surgeons provided high quality care to trauma and EGS patients during the pandemic without allowing excess mortality despite many hardships and resource constraints.

Safe endovascular retrieval of a vena cava filter after duodenal perforation

The use of vena cava filters (VCF) is a common procedure utilized in the prevention of pulmonary embolism (PE), yet VCFs have some significant and known complications, such as strut penetration and migration. Deep vein thrombosis (DVT) and PE remain a major cause of morbidity and mortality in the United States. It is estimated that as many as 900,000 individuals are affected by these each year with estimates suggesting that nearly 60,000–100,000 Americans die of DVT/PE each year. Currently, the preferred treatment for DVT/PE is anticoagulation. However, if there are contraindications to anticoagulation, an inferior vena cava (IVC) filter can be placed. These filters have both therapeutic and prophylactic indications. Therapeutic indications (documented thromboembolic disease) include absolute or relative contraindications to anticoagulation, complication of anticoagulation, failure of anticoagulation, propagation/progression of DVT during therapeutic anticoagulation, PE with residual DVT in patients with further risk of PE, free-floating iliofemoral IVC thrombus, and severe cardiopulmonary disease and DVT. There are also prophylactic indications (no current thromboembolic disease) for these filters. These include severe trauma without documented PE or DVT, closed head injury, spinal cord injury, multiple long bone fractures, and patients deemed at high risk of thromboembolic disease (immobilized or intensive care unit). Interruption of the IVC with filters has long been practiced and is a procedure that can be performed on an outpatient basis. There are known complications of filter placement, which include filter migration within the vena cava and into various organs, as well as filter strut fracture. This case describes a 66-year-old woman who was found to have a filter migration and techniques that were utilized to remove this filter.

Time Spent by Intensive Care Unit Nurses on the Electronic Health Record

BACKGROUND

The amount of time spent on the electronic health record is often cited as a contributing factor to burnout and work-related stress in nurses. Increased electronic health record use also reduces the time nurses have for direct contact with patients and families. There has been minimal investigation into the amount of time intensive care unit nurses spend on the electronic health record.

OBJECTIVE

To quantify the amount of time spent by intensive care unit nurses on the electronic health record.

METHODS

In this observational study, active electronic health record use time was analyzed for 317 intensive care unit nurses in a single institution from January 2019 through July 2020. Monthly data on electronic health record use by nurses in the medical, neurosurgical, and surgical-trauma intensive care units were evaluated.

RESULTS

Full-time intensive care unit nurses spent 28.9 hours per month on the electronic health record, about 17.5% of their clinical shift, for a total of 346.3 hours per year. Part-time nurses and those working as needed spent 20.5 hours per month (17.6%) and 7.4 hours per month (14.2%) on the electronic health record, respectively. Neurosurgical and medical intensive care unit nurses spent 25.0 hours and 19.9 hours per month, respectively. Nurses averaged 23 clicks per minute during use. Most time was spent on the task of documentation at 12.3 hours per month, which was followed by medical record review at 2.6 hours per month.

CONCLUSION

Intensive care unit nurses spend at least 17% of their shift on the electronic health record, primarily on documentation. Future interventions are necessary to reduce time spent on the electronic health record and to improve nurse and patient satisfaction.

Atrial Cannulation During Resuscitative Clamshell Thoracotomy

BACKGROUND

Resuscitative thoracotomy and clamshell thoracotomy are performed in the setting of traumatic arrest with the intent of controlling hemorrhage, relieving tamponade, and providing open chest cardiopulmonary resuscitation. Historically, return of spontaneous circulation rates for penetrating traumatic arrest as well as out of hospital survival have been reported as low as 40% and 10%. Vascular access can be challenging in patients who have undergone a traumatic arrest and can be a limiting step to effective resuscitation. Atrial cannulation is a well-established surgical technique in cardiac surgery. Herein, we present a case series detailing our application of this technique in the context of acute trauma resuscitation during clamshell thoracotomy for traumatic arrest in the emergency department.

METHODS

A retrospective case series of atrial cannulation during traumatic arrest was conducted in Charlotte, NC at Carolinas Medical Center an urban level 1 trauma center.

RESULTS

The mean rate of return of spontaneous circulation in our series, 60%, was greater than previously published upper limit of return of spontaneous circulation for penetrating causes of traumatic arrest.

DISCUSSION

Intravenous access can be difficult to establish in the hypovolemic and exsanguinating patient. Traditional methods of vascular access may be insufficient in the setting of central vascular injury. Atrial appendage cannulation during atrial cannulation is a quick and reliable technique to achieve vascular access that employs common methods from cardiac surgery to improve resuscitation of traumatic arrest.

Unseen Burden of Injury: Post-Hospitalization Mortality in Geriatric Trauma Patients

BACKGROUND/OBJECTIVES

Older adults are at risk for adverse outcomes after trauma, but little is known about post-acute survival as state and national trauma registries collect only inpatient or 30-day outcomes. This study investigates long-term, out-of-hospital mortality in geriatric trauma patients.

METHODS

Level I Trauma Center registry data were matched to the US Social Security Death Index (SSDI) to determine long-term and out-of-hospital outcomes of older patients. Blunt trauma patients aged ≥65 were identified from 2009 to 2015 in an American College of Surgeons Level 1 Trauma Center registry, n = 6289 patients with an age range 65-105 years, mean age 78.5 ± 8.4 years. Dates of death were queried using social security numbers and unique patient identifiers. Demographics, injury, treatments, and outcomes were compared using descriptive and univariate statistics.

RESULTS

Of 6289 geriatric trauma patients, 505 (8.0%) died as an inpatient following trauma. Fall was the most common mechanism of injury (n = 4757, 76%) with mortality rate of 46.5% at long-term follow-up; motor vehicle crash (MVC) (n = 1212, 19%) had long-term mortality of 27.6%. Overall, 24.1% of patients died within 1 year of trauma. Only 8 of 488 patients who died between 1 and 6 months post-trauma were inpatient. Mortality rate varied by discharge location: 25.1% home, 36.4% acute rehabilitation, and 51.5% skilled nursing facility, P < .0001.

CONCLUSION

Inpatient and 30-day mortality rates in national outcome registries fail to fully capture the burden of trauma on older patients. Though 92% of geriatric trauma patients survived to discharge, almost one-quarter had died by 1 year following their injuries.

Emergency General Surgery Regionalization: Retrospective Cohort Study of Emergency General Surgery Patients at a Tertiary Care Center

BACKGROUND

Emergency general surgery (EGS) patients presenting at tertiary care hospitals may bypass local hospitals with adequate resources. However, many tertiary care hospitals frequently operate at capacity. We hypothesized that understanding patient geographic origin could identify opportunities for enhanced system triage and optimization and be an important first step for EGS regionalization and care coordination that could potentially lead to improved utilization of resources.

METHODS

We analyzed patient zip code and categorized EGS patients who were cared for at our tertiary care hospital as potentially divertible if the southern region hospital was geographically closer to their home, regional hospital admission (RHA) patients, or local admission (LA) patients if the tertiary care facility was closer. Baseline characteristics and outcomes were compared for RHA and LA patients.

RESULTS

Of 14 714 EGS patients presenting to the tertiary care hospital, 30.2% were categorized as RHA patients. Overall, 1526 (10.4%) patients required an operation including 527 (34.5%) patients who were potentially divertible. Appendectomy and cholecystectomy comprised 66% of the operations for potentially divertible patients. Length of stay was not significantly different (P = .06) for RHA patients, but they did have lower measured short-term and long-term mortality when compared to their LA counterparts (P < .05).

CONCLUSIONS

EGS diagnoses and patient geocode analysis can identify opportunities to optimize regional operating room and bed utilization. Understanding where EGS patients are cared for and factors that influenced care facility will be critical for next steps in developing EGS regionalization within our system.

Emergency medicine residents spend over 7.5 months of their 3-year residency on the electronic health record

BACKGROUND

Use of the electronic health record (EHR) is a standard component of modern patient care. Although EHRs have improved since inception, cumbersome workflows decrease the time for residents to spend on clinical and educational activities. This study aims to quantify the time spent interacting with the EHR during a 3-year emergency medicine (EM) residency.

METHODS

System records of time spent actively engaged in EHR use were analyzed for 98 unique EM residents over a period of 5 years from July 2015 to June 2020. Time spent on the EHR was totaled to give a career time, with a "work month" defined as a 4-week period of 70.5 h per week, based on Accreditation Council for Graduate Medical Education work hour restrictions for EM residents. Engagement in specific activities such as chart review, documentation preparation, and order entry were separately analyzed.

RESULTS

Over their 3-year training, a resident interacted with the EHR for 2,171 continuous hours. This amounts to 30.8 work weeks or 7.7 work months. Chart review was the most time-intensive activity at 11.42 weeks. Documentation accounted for 9.91 weeks, with an average career total of 7,280 notes created. Additionally, each resident spent 4.57 weeks on order entry, with 46,347 orders entered during training. While the number of charts opened increased after first year of residency, average time spent on each activity per patient decreased.

CONCLUSIONS

This unique study quantifies the total time an EM resident spends on the EHR during a 3-year residency. Use of the EHR accounted for over 7.5 work months or nearly 21% of their training. Residents spend a substantial portion of their training interacting with the EHR and workflow improvements to reduce EHR time are critical for maximizing training time.

Prehospital End-Tidal CO2: A Superior Marker for Mortality Risk in the Acutely Injured Patient

BACKGROUND

Emergency medical personnel must expeditiously triage acutely injured patients to the appropriate medical facility. Efficient and objective variables to facilitate this process and provide information to the receiving trauma center are needed. Currently, multiple variables are used to prognosticate injury severity and risk of mortality including vital signs, mental status, lactate, and base excess. We investigated the prehospital use of end-tidal carbon dioxide (ETCO₂) as a noninvasive physiologic measure that can be obtained in the acutely injured patient.

METHODS

We performed a retrospective analysis of 557 acutely injured patients over 2 years at a Level 1 trauma center. All patients arriving as trauma activations with ETCO₂ measurements were included in analysis. End-tidal carbon dioxide measurements were categorized as low, normal, and high based on reference levels. Mortality was the primary outcome. Secondary receiver operator curves (ROC) for base excess, venous lactate, blood pressure, and venous pH were compared. We hypothesized ETCO₂ levels would be able to predict mortality.

RESULTS

End-tidal carbon dioxide levels conferred a mortality rate of 38%, 17.3%, and 2.9% for low, normal, and high, respectively (P < .001). Receiver operator curve analysis produced an area under the curve predictive value for ETCO₂ (.748) which was superior to lactate (.660), SBP (.578), pH (.560), and base excess (.497).

DISCUSSION

End-tidal carbon dioxide is a more sensitive and specific predictor of mortality in the acutely injured patient compared to venous lactate, base deficit, blood pressure, or venous pH. Additional studies are needed to determine if ETCO₂ can be used as an effective prehospital adjunct to prevent mortality in acutely injured patients.

The Obesity Paradox in Emergency General Surgery Patients

Operative management of emergency general surgery (EGS) diagnoses involves a range of procedures which can carry high morbidity and mortality. Little is known about the impact of obesity on patient outcomes. The aim of this study was to examine the association between body mass index (BMI) >30 kg/m² and mortality for EGS patients. We hypothesized that obese patients would have increased mortality rates.

A regional integrated health system EGS registry derived from The American Association for the Surgery of Trauma EGS ICD-9 codes was analyzed from January 2013 to October 2015. Patients were stratified into BMI categories based on WHO classifications. The primary outcome was 30-day mortality. Longer-term mortality with linkage to the Social Security Death Index was also examined. Univariate and multivariable analyses were performed.

A total of 60 604 encounters were identified and 7183 (11.9%) underwent operative intervention. Patient characteristics include 53% women, mean age 58.2 ± 18.7 years, 64.2% >BMI 30 kg/m², 30.2% with chronic obstructive pulmonary disease, 19% with congestive heart failure, and 31.1% with diabetes. The most common procedure was laparoscopic cholecystectomy (36.4%). Overall, 90-day mortality was 10.9%. In multivariable analysis, all classes of obesity were protective against mortality compared to normal BMI. Underweight patients had increased risk of inpatient (OR = 1.9, CI = 1.7-2.3), 30-day (OR = 1.9, CI = 1.7-2.1), 90-day (OR = 1.8, CI 1.6-2.0), 1-year (OR = 1.8, CI = 1.7-2.0), and 3-year mortality (OR = 1.7, CI = 1.6-1.9).

When stratified by BMI, underweight EGS patients have the highest odds of death. Paradoxically, obesity appears protective against death, even when controlling for potentially confounding factors. Increased rates of nonoperative management in the obese population may impact these findings.

Endovascular Graft Repair for Blunt Traumatic Disruption of the Thoracic Aorta: Experience at a Nonuniversity Hospital

Blunt thoracic aortic injury (BAI) represents the second leading cause of death from blunt trauma. Admission rates for BAI are extremely low because instant fatality occurs in nearly 75 per cent of patients. Management strategies have transitioned from the more invasive immediate thoracotomy to delayed endograft repair with strict hemodynamic management. In this study, we assess outcomes and complications of open versus endograft repair for BAI at a nonuniversity hospital. Retrospective chart review was conducted on 49 patients admitted to a Level I trauma center who incurred BAI from 2004 to 2011. Collected data points included demographics, mortality, complication rates, and intensive care unit and hospital length of stay (LOS). Twenty-one patients underwent open thoracotomy (OPEN), whereas 28 patients were managed with thoracic endovascular aortic repair (TEVAR). The overall 30-day mortality rate was significantly lower comparing TEVAR to OPEN (7.1 vs 50%, P = 0.028); seven deaths occurred in the OPEN group versus two with TEVAR. Overall complications, including mortality, acute respiratory distress syndrome, renal failure, pneumonia, pulmonary embolism, and cardiac arrest, were fewer after TEVAR (32.1 vs 81.0%, P < 0.001) despite similar injury severity. Survivor hospital LOS (26.0 ± 15.3 vs 27.7 ± 18.7 days, P = 0.79), intensive care unit LOS (13.5 ± 10.9 vs 12.7 ± 8.8 days, P = 0.94), and ventilator days (11.4 ± 13.4 vs 16.4 ± 14.5 days, P = 0.25) were similar. Early nonoperative management with TEVAR for BAIs is a feasible and effective management strategy. Improved patient outcomes over traditional open thoracotomy in the presence of similar injury severity can be seen after TEVAR in the nonuniversity hospital setting.

Advancing the Use of Laparoscopy in Trauma: Repair of Intraperitoneal Bladder Injuries

Traumatic intraperitoneal bladder rupture (IBR) requires surgical repair. Traditionally performed via laparotomy, experience with laparoscopic bladder repair (LBR) after blunt trauma is limited. Benefits of laparoscopy include decreased length of stay (LOS), less pain, early return to work, fewer adhesions, and lower risk of incisional hernia. The aim of this series is to demonstrate the potential superiority of LBR in select trauma patients. This is a retrospective review performed of all IBR patients from 2008 to 2016. Demographics, clinical management, outcomes, and follow-up were compared between LBR and open bladder repair (OBR) patients. Twenty patients underwent OBR, and seven underwent LBR. There was no significant difference in gender, age, or Injury Severity Score. There were no deaths or reoperations in either group. Average hospital length of stay and ICU days were similar between groups. There was one patient with UTI and one with readmission in each group. There were two incisional hernias and two bowel obstructions in the OBR group, with one patient requiring operative intervention. No such complications occurred in the LBR group. LBR for traumatic IBR can be safely performed in select patients, even in those with multiple extra-abdominal injuries.

Advancing the Use of Laparoscopy in Trauma: Repair of Intraperitoneal Bladder Injuries

Traumatic intraperitoneal bladder rupture (IBR) requires surgical repair. Traditionally performed via laparotomy, experience with laparoscopic bladder repair (LBR) after blunt trauma is limited. Benefits of laparoscopy include decreased length of stay (LOS), less pain, early return to work, fewer adhesions, and lower risk of incisional hernia. The aim of this series is to demonstrate the potential superiority of LBR in select trauma patients. This is a retrospective review performed of all IBR patients from 2008 to 2016. Demographics, clinical management, outcomes, and follow-up were compared between LBR and open bladder repair (OBR) patients. Twenty patients underwent OBR, and seven underwent LBR. There was no significant difference in gender, age, or Injury Severity Score. There were no deaths or reoperations in either group. Average hospital length of stay and ICU days were similar between groups. There was one patient with UTI and one with readmission in each group. There were two incisional hernias and two bowel obstructions in the OBR group, with one patient requiring operative intervention. No such complications occurred in the LBR group. LBR for traumatic IBR can be safely performed in select patients, even in those with multiple extra-abdominal injuries.

The use of component separation during abdominal wall reconstruction in contaminated fields: A case-control analysis

BACKGROUND

Component separation technique (CST) allows fascial medialization during abdominal wall reconstruction (AWR). Wound contamination increases the incidence of wound complications, which multiplies the incidence of repair failure. The aim of this study was to compare the impact of CST on AWR outcomes in contaminated fields in comparison to those operations without CST.

METHODS

A prospective, single institution hernia database was queried for patients undergoing AWR with CST and contamination. A case control cohort was identified using propensity score matching.

RESULTS

There were 286 CSTs performed in contaminated cases. After propensity score matching, 61 CSTs were compared to 61 No-CSTs. These groups were matched by defect area (CST:287.1 ± 150.4 vs No-CST:277.6 ± 218.4 cm², p = 0.156), BMI (32.0 ± 7.0 vs 32.2 ± 6.0 kg/m², p = 0.767), diabetes (26.2% vs 32.8%, p = 0.427), and panniculectomy (52.5% vs 36.1%, p = 0.068). Groups had similar rates of wound complications (42.6% vs 40.7%, p = 0.829) and recurrence (4.9% vs 13.1%, p = 0.114).

CONCLUSIONS

The use of CST in the face of contamination is not associated with an increase in wound complications, mesh complications, or recurrence.

Filled to the brim: The characteristics of over-triage at a level I trauma center

BACKGROUND

Interfacility transfers are necessary and valuable for the trauma system, but despite regional guidelines, many patients are inappropriately transferred. We evaluated over-triage at our Level I center and identified risk factors for over-triage.

METHODS

Retrospective analysis at our Level I urban trauma center assessed patients transferred from regional facilities during 2017. Over-triage was defined as patients discharged <48 h without procedures. Exclusion criteria were leaving against medical advice or no outside records.

RESULTS

Overall, 2352 patients met criteria. Nine hundred thirty (39.5%) with complete hospital records were discharged in <48 h; 498 (53.5%) received no procedural intervention and 909 (97.7%) were ultimately discharged home.

CONCLUSION

Many patients are inappropriately transferred to tertiary care centers without a definitive need for advanced services. Studies are needed to improve triage criteria without increasing under-triage.

Not a Routine Case, Why Expect the Routine Outcome? Quantifying the Infectious Burden of Emergency General Surgery Using the NSQIP

Emergent surgeries have different causes and physiologic patient responses than the same elective surgery, many of which are due to infectious etiologies. Therefore, we hypothesized that emergency cases have a higher risk of postoperative SSI than their elective counterparts. The ACS NSQIP database was queried from 2005 to 2016 for all cholecystectomies, ventral hernia repairs, and partial colectomies to examine common emergency and elective general surgery operations. Thirty-day outcomes were compared by emergent status. Any SSI was the primary outcome. There were 863,164 surgeries: 416,497 cholecystectomies, 220,815 ventral hernia repairs, and 225,852 partial colectomies. SSIs developed in 38,865 (4.5%) patients. SSIs increased with emergencies (5.3% vs 3.6% for any SSI). Postoperative sepsis (5.8% vs 1.5%), septic shock (4.7% vs 0.6%), length of stay (8.1 vs 2.9 days), and mortality (3.6% vs 0.4%) were increased in emergent surgery; P < 0.001 for all. When controlling for age, gender, BMI, diabetes, smoking, wound classification, comorbidities, functional status, and procedure on multivariate analysis, emergency surgery (odds ratio 1.15, 95% confidence interval 1.11–1.19) was independently associated with the development of SSI. Patients undergoing emergency general surgery experience increased rates of SSI. Patients and their families should be appropriately counseled regarding these elevated risks when consenting for emergency surgery.

Not a Routine Case, Why Expect the Routine Outcome? Quantifying the Infectious Burden of Emergency General Surgery Using the NSQIP

Emergent surgeries have different causes and physiologic patient responses than the same elective surgery, many of which are due to infectious etiologies. Therefore, we hypothesized that emergency cases have a higher risk of postoperative SSI than their elective counterparts. The ACS NSQIP database was queried from 2005 to 2016 for all cholecystectomies, ventral hernia repairs, and partial colectomies to examine common emergency and elective general surgery operations. Thirty-day outcomes were compared by emergent status. Any SSI was the primary outcome. There were 863,164 surgeries: 416,497 cholecystectomies, 220,815 ventral hernia repairs, and 225,852 partial colectomies. SSIs developed in 38,865 (4.5%) patients. SSIs increased with emergencies (5.3% vs 3.6% for any SSI). Postoperative sepsis (5.8% vs 1.5%), septic shock (4.7% vs 0.6%), length of stay (8.1 vs 2.9 days), and mortality (3.6% vs 0.4%) were increased in emergent surgery; P < 0.001 for all. When controlling for age, gender, BMI, diabetes, smoking, wound classification, comorbidities, functional status, and procedure on multivariate analysis, emergency surgery (odds ratio 1.15, 95% confidence interval 1.11-1.19) was independently associated with the development of SSI. Patients undergoing emergency general surgery experience increased rates of SSI. Patients and their families should be appropriately counseled regarding these elevated risks when consenting for emergency surgery.

“Death Knell” for Prophylactic Vena Cava Filters? A 20-Year Experience with a Venous Thromboembolism Guideline

The role of prophylactic vena cava filters (pVCFs) in trauma patients remains controversial. After 20 years of data collection and experience, we reviewed our venous thromboembolism guideline for the efficacy of pVCFs in preventing pulmonary embolism (PE). A retrospective cohort study was performed using our Level I trauma center registry from January 1997 thru December 2016. This population was then divided by the presence of pVCFs. Univariate analysis was performed comparing the incidence of PEs, deep vein thrombosis, and mortality between those with and without a pVCF. There were 35,658 patients identified, of whom 2 per cent (n = 847) received pVCFs. The PE rate was 0.4 per cent in both groups. The deep vein thrombosis rate for pVCFs was 3.9 per cent compared with 0.6 per cent in the no-VCF group ( P < 0.0001). Given that there was no difference in the rates of PEs between the cohorts, the subset of patients with a PE were analyzed by their risk factors. Only ventilator days > 3 were associated with a higher risk in the no-pVCF group (0.2 vs 1.5%, P = 0.033). pVCFs did not confer benefit reducing PE rate. In addition, despite their intended purpose, pVCFs cannot eliminate PEs in high-risk trauma patients, suggesting a lack of utility for prophylaxis in this population.

"Death Knell" for Prophylactic Vena Cava Filters? A 20-Year Experience with a Venous Thromboembolism Guideline

The role of prophylactic vena cava filters (pVCFs) in trauma patients remains controversial. After 20 years of data collection and experience, we reviewed our venous thromboembolism guideline for the efficacy of pVCFs in preventing pulmonary embolism (PE). A retrospective cohort study was performed using our Level I trauma center registry from January 1997 thru December 2016. This population was then divided by the presence of pVCFs. Univariate analysis was performed comparing the incidence of PEs, deep vein thrombosis, and mortality between those with and without a pVCF. There were 35,658 patients identified, of whom 2 per cent (n = 847) received pVCFs. The PE rate was 0.4 per cent in both groups. The deep vein thrombosis rate for pVCFs was 3.9 per cent compared with 0.6 per cent in the no-VCF group (P < 0.0001). Given that there was no difference in the rates of PEs between the cohorts, the subset of patients with a PE were analyzed by their risk factors. Only ventilator days > 3 were associated with a higher risk in the no-pVCF group (0.2 vs 1.5%, P = 0.033). pVCFs did not confer benefit reducing PE rate. In addition, despite their intended purpose, pVCFs cannot eliminate PEs in high-risk trauma patients, suggesting a lack of utility for prophylaxis in this population.

Mitigating clinical waste in the trauma intensive care unit: Limited clinical utility of cardiac troponin testing for trauma patients with atrial fibrillation

BACKGROUND

The clinical significance of obtaining cardiac troponin (cTn) levels among trauma patients with new onset arrhythmias is unknown. We aimed to assess whether cTn levels actually influence clinical decision making or represent an inappropriate use of resources.

METHODS

Trauma patients admitted from 2013 to 2014 diagnosed with atrial fibrillation (AF) were retrospectively reviewed using the institutional trauma database. Demographics, cTn levels, and myocardial infarction (MI) diagnosis data were recorded. Standard univariate tests were used to compare data between patients with and without cTn.

RESULTS

There were 258 patients included of which 126 patients had cTn levels obtained (48.8%, TEST group). The remaining 132 patients (51.2%) were untested (noTEST group). Among TEST patients, use of echocardiography nearly doubled and cardiology consultations increased (all p < 0.05). No TEST patients suffered MI or PE.

CONCLUSIONS

Obtaining cTn values in trauma patients with new-onset AF resulted in increased resource utilization without clinical utility.

Implementation of a Nurse-Driven Protocol for Catheter Removal to Decrease Catheter-Associated Urinary Tract Infection Rate in a Surgical Trauma ICU

INTRODUCTION

Early removal of urinary catheters is an effective strategy for catheter-associated urinary tract infection (CAUTI) prevention. We hypothesized that a nurse-directed catheter removal protocol would result in decreased catheter utilization and CAUTI rates in a surgical trauma intensive care unit (STICU).

METHODS

We performed a retrospective, cohort study following implementation of a multimodal CAUTI prevention bundle in the STICU of a large tertiary care center. Data from a 19-month historical control were compared to data from a 15-month intervention period. Pre- and postintervention indwelling catheter utilization and CAUTI rates were compared.

RESULTS

Catheter utilization decreased significantly with implementation of the nurse-driven protocol from 0.78 in the preintervention period to 0.70 in the postintervention period (P < .05). As a result of the bundle, the CAUTI rate declined significantly, from 5.1 to 2.0 infections per 1000 catheter-days in the pre- vs postimplementation period (Incident Rate Ratio [IRR]: 0.38, 95% confidence interval: 0.21-0.65).

CONCLUSIONS

Implementation of a nurse-driven protocol for early urinary catheter removal as part of a multimodal CAUTI intervention strategy can result in measurable decreases in both catheter utilization and CAUTI rates.

Defining Dogma: Quantifying Crystalloid Hemodilution in a Prospective Randomized Control Trial with Blood Donation as a Model for Hemorrhage

BACKGROUND

The concept of hemodilution after blood loss and crystalloid infusion is a surgical maxim that remains unproven in humans. We sought to quantify the effect of hemodilution after crystalloid administration in voluntary blood donors as a model for acute hemorrhage.

STUDY DESIGN

A prospective, randomized control trial was conducted in conjunction with community blood drives. Donors were randomized to receive no IV fluid (noIVF), 2 liters of normal saline (NS), or 2 liters lactated Ringer's (LR) after blood donation. Blood samples were taken before donation of 500 mL of blood, immediately after donation, and after IV fluid administration. Hemoglobin (Hgb) was measured at each time point. Hemoglobin measurements between time points were compared between groups using standard statistical tests and the Bonferroni correction for multiple comparisons. Statistical significance was set at p ≤ 0.0167.

RESULTS

Of 165 patients consented, 157 patients completed the study. Average pre-donation Hgb was 14.3 g/dL. There was no difference in the mean Hgb levels after blood donation between the 3 groups (p > 0.05). Compared with the control group, there was a significant drop in Hgb in the crystalloid infused groups from the post-donation level to post-resuscitation (13.2 vs 12.1 vs 12.2 g/dL, p < 0.0001). A formula was created to predict hemoglobin levels from a given estimated blood loss (EBL) and volume replacement (VR): Hemodilution Hgb = (mean pre-donation Hgb - hemorrhage Hgb drop - equilibration hemoglobin drop - resuscitation Hgb drop) = Mean pre-donation Hgb - [(EBL/TBV)*l] - [(EBL/TBV)*h] - [(VR/TBV)*r], l = 5.111g/dL = blood loss coefficient, h = 6.722 g/dL = equilibration coefficient, r = 2.617g/dL = resuscitation coefficient.

CONCLUSIONS

This study proves the concept of hemodilution and derived a mathematical relationship between blood loss and resuscitation. These data may help to estimate response of hemoglobin levels to blood loss and fluid resuscitation in clinical practice.

Returning from the acidotic abyss: Mortality in trauma patients with a pH < 7.0

INTRODUCTION

We hypothesized that a pH of <7.0 on presentation would correlate with almost universal mortality in trauma patients.

METHODS

A retrospective cohort study was performed on a Level I trauma center registry from 2013 to 2014. Hospital mortality was the primary outcome, which was compared by pH cohort (<7.0 or ≥7.0) using standard univariate statistics and multivariate logistic regression.

RESULTS

There were 593 patients included in the analysis: 66 in <7.0, 527 in ≥7.0. Mortality was 3× higher in the <7.0 pH cohort (62.1 vs. 20.3%; p < 0.0001), however there was no threshold for a pH below which there was 100% mortality. After controlling for these confounding variables, initial pH was found to be an independent predictor of inpatient mortality: pH < 7.0 (OR 6.33, 3.29-12.19; p < 0.0001).

CONCLUSION

This data indicates that while patients with severe acidosis are at increased risk for mortality, a pH < 7.0 is still recoverable in select cases.

Does history of substance use disorder predict acute traumatic brain injury rehabilitation outcomes?

BACKGROUND/OBJECTIVE

The study explored whether premorbid substance use disorder (SUD) predicts acute traumatic brain injury (TBI) outcomes.

METHODS

143 participants with moderate (34.2%) and severe (65.8%) TBI were enrolled at two Level 1 trauma center inpatient brain injury rehabilitation units. Acute outcomes were measured with the Disability Rating Scale (DRS), the FIMTM; self and informant ratings of the Patient Competency Rating Scale (PCRS); self and family rating of the Frontal Systems Behavioral Scale (FrSBe), and the Neurobehavioral Rating Scale-Revised (NRS-R).

RESULTS

Hierarchical linear modeling revealed that SUD history significantly predicted trajectories of PCRS clinician ratings, PCRS self-family and PCRS self-clinician discrepancy scores, and more negative FrSBE family ratings. These findings indicate comparatively greater post-injury executive functions (EF) impairments, particularly self-awareness (SA) of injury-related deficits, for those with SUD history. No significant SUD*time interaction effect was found for FIM or NRS-R scores.

CONCLUSIONS

SUD history and TBI are associated with impaired SA and EF but their co-occurrence is not a consistent predictor of acute post-injury functional outcomes. Pre-morbid patient characteristics and rater expectations and biases may moderate associations between SA and recovery after TBI.

Analysis of the Final DENALI Trial Data: A Prospective, Multicenter Study of the Denali Inferior Vena Cava Filter

PURPOSE

To report the final 2-year data on the efficacy and safety of a nitinol retrievable inferior vena cava (IVC) filter for protection against pulmonary embolism (PE).

MATERIALS AND METHODS

This was a prospective multicenter trial of 200 patients with temporary indications for caval filtration who underwent implantation of the Denali IVC filter. After filter placement, all patients were followed for 2 years after placement or 30 days after filter retrieval. The primary endpoints were technical success of filter implantation in the intended location and clinical success of filter placement and retrieval. Secondary endpoints were incidence of clinically symptomatic recurrent PE, new or propagating deep vein thrombosis (DVT), and filter-related complications including migration, fracture, penetration, and tilt.

RESULTS

Filter placement was technically successful in 199 patients (99.5%). Filters were clinically successful in 190 patients (95%). The rate of PE was 3% (n = 6), with 5 patients having a small subsegmental PE and 1 having a lobar PE. New or worsening DVT was noted in 26 patients (13%). Filter retrieval was attempted 125 times in 124 patients and was technically successful in 121 patients (97.6%). The mean filter dwell time at retrieval was 200.8 days (range, 5-736 d). There were no instances of filter fracture, migration, or tilt greater than 15° at the time of filter retrieval or during follow-up.

CONCLUSIONS

The Denali IVC filter exhibited high success rates for filter placement and retrieval while maintaining a low complication rate in this clinical trial.

Evaluation of the Efficacy of the Electrosurgical Bipolar Vessel Sealer (LigaSure) Devices in Sealing Lymphatic Vessels

Various sources of ultrasonic and thermal energy have been developed to facilitate blood vessel ligation. However, their efficacy in sealing lymphatics has not been clearly established to date. We hypothesized that the electrosurgical bipolar vessel sealer (EBVS) produces reliable and durable sealing of large lymphatic vessels in a porcine model. Thoracic ducts from 4 adult pigs were explanted and sealed at multiple levels by using 3 different EBVS devices: LigaSure Atlas, XTD, and V. Fifteen seals (5 per group) were analyzed for sealing time and visual quality. Seal burst strength was measured by using a graduated pressure saline injection system. Twelve intact seals also underwent a histologic analysis. The mean overall burst strength of the seals was 271 78 mm Hg (127 to 360 mm Hg). The burst pressures in the 3 groups were not statistically different. The overall mean time to achieve a seal was 5.12.2 seconds (3 to 10 seconds). Seals were achieved significantly faster in the V group (4.10.6 seconds) compared with the Atlas (6.32.3 seconds) and XTD (6.4 2.6 seconds) groups. Qualitative seal assessment revealed minimal sticking and charring, a favorable degree of seal tissue clarity, and desiccation in the 3 groups. Histologic analysis demonstrated a fusion of lymphovascular channels with a complete obliteration of the lumens. We demonstrated that the use of EBVS results in a fast and effective sealing of large porcine lymphatic vessels. The seals created by all 3 devices burst at markedly supraphysiologic intraluminal pressures. Ongoing randomized human trials may prove the clinical benefits of the routine use of EBVS devices for various tissue dissections.

Abdominal Wall Reconstruction After Temporary Abdominal Closure: A Ten-Year Review

Abdominal wall reconstruction (AWR) is often required for hernias created after temporary abdominal closure (TAC). Demographic and clinical data from patients undergoing TAC and AWR between January 1, 1992, and December 31, 2002, were collected and univariate analysis performed. Temporary abdominal closure and AWR were performed in 21 patients. Complications developed in 12 patients (57.1%) after TAC; associated risk factors were mesh placement ( P = .04) and skin grafting ( P = .04). Successful AWR included mesh (n = 6), component separation (n = 6), primary repair (n = 4), and 3 combination techniques. Six patients (28.6%) developed intraoperative complications, and 14 (66.7%) developed postoperative complications. Intraoperative complications were increased in patients with tissue expanders ( P = .01). Postoperative complications ( P = .04) were less likely with component separation. The complication rate with TAC and AWR is high. Tissue expanders are associated with an increased risk of intraoperative complications with AWR, whereas component separation is associated with a reduction in postoperative complications.

Acute Colonic Pseudo-obstruction: Defining the Epidemiology, Treatment, and Adverse Outcomes of Ogilvie's Syndrome

Acute colonic pseudo-obstruction (ACPO) is a rare but often fatal disease. Herein, we present the largest study to date on ACPO. The National Inpatient Sample was queried for ACPO diagnoses from 1998 to 2011. Patients were analyzed by treatment into four groups: medical management (MM), colonoscopy alone [(endoscopy-only group) ENDO], surgery alone (SURG), or surgery and colonoscopy (SAC). Logistic regression was used to identify predictors of adverse outcomes by treatment group. There were 106,784 cases of ACPO: 96,657 (90.5%) MM, 2,915 (2.7%) ENDO, 6,731 (6.3%) SURG, and 481 (0.5%) SAC. The medical complication (45.7%), procedural complication (15.9%), and mortality rates (7.7%) were high. Increasing procedure invasiveness was independently associated with higher odds of medical complications, procedural complications, and death (P < 0.0125). The odds of death were significantly higher in the ENDO [odds ratio (OR) = 1.2], SURG (OR 1.4), and SAC (OR = 1.8) groups (P < 0.0125). Those who fail MM and require procedures have increasing morbidity and mortality with increasing invasiveness, likely reflecting the severity of their conditions.

Do not waste your time: straight to magnetic resonance imaging for pediatric burners and stingers

BACKGROUND

Permanent neurologic injury in pediatric patients with burner and stinger syndrome (BSS) is unlikely. This study aims to assess the feasibility of clinical observation without extensive radiologic workup in this selective population.

METHODS

A retrospective study was conducted of patients aged younger than 18 years evaluated at a level I trauma center from 2012 to 2014. Patients were grouped according to positive deficit (PD) or negative deficit (ND) upon physical examination. Demographics, clinical findings, and outcomes were analyzed.

RESULTS

Thirty patients (ND, n = 14; PD, n = 16) were evaluated for BSS, most often as a result of injurious football tackle. Age and length of stay were similar between groups. Injury Severity Score was lower in the ND group than the PD group (1.6 ± 1.2 vs 3.8 ± 3.1, respectively; P< .05). Cervical computed tomography was performed on 11 patients (78.6%) in the ND group and 15 patients (93.8%) in the PD group at considerable added cost, with only 1 positive result in the ND group and none in the PD group. Magnetic resonance imaging (MRI) revealed 2 positive findings in each group, and no surgical interventions were indicated. Ten ND (71.4%) and 12 PD (75%) patients reported complete resolution of symptoms at discharge (P> .05).

CONCLUSIONS

Children presenting with BSS experience temporary symptoms that resolve without surgical intervention. Magnetic resonance imaging identified more injuries than computed tomographic imaging; therefore, we suggest that management for BSS should include observation, serial neurologic examinations, and MRI evaluation as appropriate.

A prospective randomized double-blinded controlled trial evaluating indocyanine green fluorescence angiography on reducing wound complications in complex abdominal wall reconstruction

BACKGROUND

The purpose of this prospective, randomized, double-blinded controlled trial was to investigate the utility of indocyanine green fluorescence angiography (ICG-FA) in reducing wound complications in complex abdominal wall reconstruction.

MATERIALS AND METHODS

All consented patients underwent ICG-FA with SPY Elite after hernia repair and before flap closure. They were randomized into the control group, in which the surgical team was blinded to ICG-FA images and performed surgery as they normally would, or the experimental group, in which the surgery team viewed the images and could modify tissue flaps according to their findings. Patient variables and wound complications were compared with standard statistical methods.

RESULTS

Among 95 patients, n = 49 control versus n = 46 experimental, preoperative characteristics were similar including age (58.3 versus 56.7 y; P = 0.4), body mass index (34.9 versus 33.6 kg/m(2); P = 0.8), tobacco use (8.2% versus 8.7%; P = 0.9), diabetes (30.6% versus 37.0%; P = 0.5), and previous hernia repair (71.4% versus 60.9%; P = 0.3). Operative characteristics were also similar, including rate of panniculectomy (69.4% versus 58.7%; P = 0.3) and component separation (73.5% versus 69.6%; P = 0.6). The experimental group more often had advancement flaps modified (37% versus 4.1%, P < 0.0001). There was no difference between groups in rates of skin necrosis (6.1% versus 2.2%; P = 0.3), fat necrosis (10.2% versus 13.0%, P = 0.7), reoperation (14.3% versus 26.1%, P = 0.7), wound infection (10.2% versus 21.7%; P = 0.12), or overall wound-related complications (32.7% versus 37.0%, P = 0.7). Skin/subcutaneous hypoperfusion on ICG-FA was associated with higher rates of wound infection (28% versus 9.4%, P < 0.02), but flap modification after viewing images did not prevent wound-related complications (15.6% versus 12.5%, P = 0.99).

CONCLUSIONS

This is the first randomized, double-blinded, controlled trial to evaluate ICG-FA in abdominal wall reconstruction. Although ICG-FA guidance and intraoperative modification of flaps did not prevent wound-related complications or reoperation, it did identify at risk patients.

Femur fractures should not be considered distracting injuries for cervical spine assessment

INTRODUCTION

The National Emergency X-Radiography Utilization Study (NEXUS) clinical decision rule is extremely sensitive for clearance of cervical spine (C-spine) injury in blunt trauma patients with distracting injuries.

OBJECTIVES

We sought to determine whether the NEXUS criteria would maintain sensitivity for blunt trauma patients when femur fractures were not considered a distracting injury and an absolute indication for diagnostic imaging.

METHODS

We retrospectively analyzed blunt trauma patients with at least 1 femur fracture who presented to our emergency department as trauma activations from 2009 to 2011 and underwent C-spine injury evaluation. Presence of C-spine injury requiring surgical intervention was evaluated.

RESULTS

Of 566 trauma patients included, 77 (13.6%) were younger than 18 years. Cervical spine injury was diagnosed in 53 (9.4%) of 566. A total of 241 patients (42.6%) had positive NEXUS findings in addition to distracting injury; 51 (21.2%) of these had C-spine injuries. Of 325 patients (57.4%) with femur fractures who were otherwise NEXUS negative, only 2 (0.6%) had C-spine injuries (95% confidence interval [CI], 0.2%-2.2%); both were stable and required no operative intervention. Use of NEXUS criteria, excluding femur fracture as an indication for imaging, detected all significant injuries with a sensitivity for any C-spine injury of 96.2% (95% CI, 85.9%-99.3%) and negative predictive value of 99.4% (95% CI, 97.6%-99.9%).

CONCLUSIONS

In our patient population, all significant C-spine injuries were identified by NEXUS criteria without considering the femur fracture a distracting injury and indication for computed tomographic imaging. Reconsidering femur fracture in this context may decrease radiation exposure and health care expenditure with little risk of missed diagnoses.