Amalia Cochran

Hyperglycemia and outcomes from pediatric traumatic brain injury.

BACKGROUND The clinical significance of hyperglycemia after pediatric traumatic brain injury is controversial. This study addresses the relationship between hyperglycemia and outcomes after traumatic brain injury in pediatric patients. METHODS We identified trauma patients admitted during a single year to our regional pediatric referral center with head regional Abbreviated Injury Scale scores > or = 3. We studied identified patients for admission characteristics potentially influencing their outcomes. The primary outcome measure was Glasgow Outcome Scale score. RESULTS Patients who died had significantly higher admission serum glucose values than those patients who survived (267 mg/dL vs. 135 mg/dL; p = 0.000). Admission serum glucose > or = 300 mg/dL was uniformly associated with death. Admission Glasgow Coma Scale score (odds ratio, 0.560; 95% confidence interval, 0.358-0.877) and serum glucose (odds ratio, 1.013; 95% confidence interval, 1.003-1.023) are independent predictors of mortality in children with traumatic head injuries. CONCLUSION Hyperglycemia and poor neurologic outcome in head-injured children are associated. The pathophysiology of hyperglycemia in neurologic injury after head trauma remains unclear.

Telemedicine Evaluation of Acute Burns Is Accurate and Cost-Effective

BACKGROUND As the number of US burn centers has declined, access to burn care is increasingly limited. Inexperience in burn wound assessment by referring physicians often results in overtriage or undertriage. In an effort to improve access to burn care in our region, we instituted a program of telemedicine evaluation of acute burns. METHODS We created a telemedicine network linking our burn center to three hospitals located 298 to 350 air miles away. Participants agreed to perform telemedicine consultation for acutely burned patients admitted to their emergency departments. We compared consults and referrals from these facilities during the period July 2005 to August 2007 (TELE) to those during a 2-year period before instituting telemedicine (PRE-TELE). RESULTS During the TELE period, 80 patients were referred, of whom 70 were seen acutely by telemedicine, compared with 28 PRE-TELE referrals. The groups did not differ in age or burn size. Only 31 patients seen by telemedicine received emergency air transport (44.3%), compared with 100% of PRE-TELE patients (p < 0.05). Nine other TELE patients were transported by family; 30 other patients were treated locally. Ten remaining patients were transported without telemedicine evaluation. TELE patients transported by air had somewhat larger burn sizes (9.0% vs. 6.5% total body surface area; p = NS) and longer length of stay (13.0 days vs. 8.0 days; p = NS) than PRE-TELE patients. Burn size estimates by burn center physicians made either by telemedicine or direct inspection correlated closely but both differed significantly from those of referring physicians. Providers and patients expressed a high level of satisfaction with the telemedicine experience. CONCLUSIONS Acute evaluation of burn patients can be performed accurately by telemedicine. This can reduce undertriage or overtriage for air transport, improve resource utilization, and both enhance and extend burn center expertise to many rural communities at low cost.

Colloid administration normalizes resuscitation ratio and ameliorates "fluid creep".

Although colloid was a component of the original Parkland formula, it has been omitted from standard Parkland resuscitation for over 30 years. However, some burn centers use colloid as “rescue” therapy for patients who exhibit progressively increasing crystalloid requirements, a phenomenon termed “fluid creep.” We reviewed our experience with this procedure. With Institutional Review Board approval, we reviewed all adult patients with ≥20%TBSA burns admitted from January 1, 2005, through December 31, 2007, who completed formal resuscitation. Patients were resuscitated using the Parkland formula, adjusted to maintain urine output of 30 to 50 ml/hr. Patients who required greater amounts of fluid than expected were given a combination of 5% albumin and lactated Ringers until fluid requirements normalized. Results were expressed as an hourly ratio (I/O ratio) of fluid infusion (ml/kg/%TBSA/hr) to urine output (ml/kg/hr). Predicted values for this ratio vary for individual patients but are usually less than 0.5 to 1.0. Fifty-two patients were reviewed, of whom 26 completed resuscitation using crystalloid alone, and the remaining 26 required albumin supplementation (AR). The groups were comparable in age, gender, weight, mortality, and time between injury and admission. AR patients had larger total and full-thickness burns and more inhalation injuries. Patients managed with crystalloid alone maintained mean resuscitation ratios from 0.13 to 0.40, whereas AR patients demonstrated progressively increasing ratios to a maximum mean of 1.97, until albumin was started. Administration of albumin produced a dramatic and precipitous return of ratios to within predicted ranges throughout the remainder of resuscitation. No patient developed abdominal compartment syndrome. Measuring hourly I/O ratios is an effective means of expressing and tracking fluid requirements. The addition of colloid to Parkland resuscitation rapidly reduces hourly fluid requirements, restores normal resuscitation ratios, and ameliorates fluid creep. This practice can be applied selectively as needed using predetermined algorithms.

Wilderness Medical Society Practice Guidelines for the Prevention and Treatment of Frostbite

The Wilderness Medical Society convened an expert panel to develop a set of evidence-based guidelines for the prevention and treatment of frostbite. We present a review of pertinent pathophysiology. We then discuss primary and secondary prevention measures and therapeutic management. Recommendations are made regarding each treatment and its role in management. These recommendations are graded based on the quality of supporting evidence and balance between the benefits and risks/burdens for each modality according to methodology stipulated by the American College of Chest Physicians.

Peripherally inserted central venous catheters and central venous catheters in burn patients: a comparative review.

Central venous catheters (CVCs) are traditionally used for central venous access in the intensive care unit setting. Use of peripherally inserted central catheters (PICCs) now often extends into the intensive care unit. The goal of this review is to compare the use and safety of PICCs vs CVCs in burn patients. This institutional review board-approved cohort review included all burn patients at a single center who received one or more PICCs during a 2-year period. Primary outcome was number of days each line remained in place. Secondary outcomes were catheter-related bloodstream infection (CR-BSI) and thrombotic and technical complications. Thirty-one burn patients had 37 PICCs during the study period. Patients and controls were comparable in terms of age, TBSA burn injury, and ventilator days. The median length of time that each PICC remained in was 8.8 vs 9.3 days for CVCs (P = .77). The CR-BSI rate for PICCs was 0 per 1000 line days, whereas for CVCs, it was 6.6 per 1000 line days (P = .13). No thrombotic complications were attributed to CVCs; one PICC-associated right upper extremity deep vein thrombosis was identified (2.8% rate). No technical complications were identified in either group. The longevity and complications of PICCs in burn patients differs little from CVCs. CVCs may have a higher rate of CR-BSI in burn patients than PICCs. Although PICCs are not adequate for the fluid volumes typically required during burn shock resuscitation, they can provide a safe and effective alternative for central access in the ongoing care of the burn patient.

Self-reported quality of life after electrical and thermal injury.

Electrical injury patients (EI) often require more procedures and longer hospital stays than their thermal injury counterparts. We hypothesized that postinjury quality of life might be better in thermal injury patients (TIs) than in EI. Each EI recorded in our institutions TRACS trade mark /ABA registry between 1995 and 2000 was matched with a TI for age and TBSA involvement. We compared SF-36 scores of EI and TIs to evaluate quality of life. Age and TBSA injury were similar between groups. SF-36 results demonstrated no significant differences in self-reported quality of life indices. Return to full-time employment did not differ significantly between groups. EI and TIs do not differ significantly in quality of life after their burn injuries. Self-evaluated function for EI and TIs is comparable. Quality of life in both EI and TIs are above population means on many dimensions.

Enoxaparin and antifactor Xa levels in acute burn patients

Altered pharmacokinetics in critically ill patients have been shown to result in inadequate enoxaparin dosing for venous thromboembolism (VTE) prophylaxis. In the burn unit, routine monitoring of antifactor Xa levels was implemented to ensure adequate VTE prophylaxis. The purpose of this study was to examine the appropriateness of enoxaparin dosing for VTE prophylaxis in this specialized patient population. The authors reviewed patients with acute burn injury from June 1, 2009, to October 20, 2009, who had enoxaparin therapy monitored with antifactor Xa levels. Data collection occurred prospectively. Thirty-eight patients received enoxaparin subcutaneously for prophylaxis of VTE and had antifactor Xa levels measured. Thirty (79%) patients had initial antifactor Xa levels less than 0.2 U/ml. Enoxaparin dosages were subsequently increased as needed to achieve antifactor Xa levels of 0.2 to 0.4 U/ml. Eight of 38 patients never achieved goal antifactor Xa level before enoxaparin was discontinued. The median final dose required to achieve an antifactor Xa level within therapeutic range was 50 mg every 12 hours (range 30–70 mg). In linear regression, final enoxaparin dose correlated with TBSA. Two patients had clinically significant thromboembolic events. There were no documented episodes of significant hemorrhage, thrombocytopenia, or heparin-associated allergy. The low antifactor Xa levels observed in this study demonstrate that standard dosing of enoxaparin for VTE prophylaxis is inadequate for patients with acute burns. In these patients, both a higher initial enoxaparin dose and routine monitoring of antifactor Xa levels are recommended.

Use of Inhaled Heparin/N -acetylcystine in Inhalation Injury : Does it help?

Inhaled heparin/N-acetylcystine (AHA) has been reported to decrease mortality in children with inhalation injury. The use of AHA therapy in adult burn patients with inhalation injury has not been evaluated. We hypothesized that patients who received AHA therapy in the management of inhalation injury would have better pulmonary mechanics and better clinical outcomes than patients who did not. This study is a retrospective chart review of pulmonary mechanics and clinical outcomes in all inpatients identified in the institutional ABA/TRACS database as having sustained inhalation injury from 1999 to 2005. Patients were not assigned to a treatment group. One hundred and fifty patients with inhalation injury were identified. Sixty-two patients were treated with AHA during the first 72 hours of admission. Treatment occurred mostly in patients admitted after 2002, with only 18 patients receiving AHA from 1999 through 2002. Treated and untreated patients did not differ in age or TBSA burn injury, nor did any studied clinical outcome differ between treated and untreated groups. In addition, there was no difference in pulmonary findings at 1 week after injury between treated and untreated patients. Although best Pao2 was higher in treated patients during the first 72 hours, this was not a durable finding, and the best Pao2/Fio2 ratio was unaffected by treatment. Importantly, the use of AHA in adults with inhalation injury did not affect clinical outcomes. A prospective, randomized trial would be of benefit to delineate the clinical benefits of AHA treatment for inhalation injury.

The Relationship of Serum Lactate and Base Deficit in Burn Patients to Mortality

Serum lactate and base deficit in trauma patients have been shown to correlate with mortality. This study examines the relationship of these parameters to mortality among burn patients. We evaluated patients with ≥20% TBSA burn injury who had a serum lactate or base deficit recorded during the initial 48 hours of admission over a 5-year period. The primary study outcome was mortality. The mean (±SD) age of study patients (N = 128) was 35.2 ± 21.1 years, the mean burn size was 41.7 ± 17.9% TBSA, and the mortality rate was 17.1%. Mean serum lactate values of patients who died were significantly higher than those of survivors at admission and at 12, 18, and 24 hours after admission. The highest serum lactate value in the first 48 hours after admission was higher for nonsurvivors than survivors. Mean base deficit at admission and 6 hours after admission was significantly lower in patients who died than in survivors; in addition, the worst base deficit during the first 48 hours of care was significantly lower in patients who died than in those who survived. Early serum lactate and base deficit values are often worse for burn patients who die than for survivors. Elevation of serum lactate values during the first 48 hours after a burn is an independent risk factor for death, but no threshold value for serum lactate is demonstrable. Resuscitation should not be withheld from burn patients on the basis of any lactate or base deficit value.

Actual burn nutrition care practices: an update.

In 1989, Williamson published a survey of nutrition care practices in burn centers. Nutrition practices have evolved since then; we conducted a study to determine the current scope of nutrition care in burn centers. With IRB approval, a 64 question survey was emailed to 103 burn centers listed in the Burn Care Resources in North America. Follow-up emails were sent to those who did not respond within 2 weeks. Sixty-five centers (63%) responded and included 66% of currently verified burn centers. Due to incomplete surveys, most questions had 45 to 50 responses. The centers averaged 246 annual admissions and all admitted non-burn patients. Eighty percent of dietitians had >5 years burn experience (vs 17% in 1989) and 90% also worked in other intensive care settings. Most dietitians reported advanced training or education (83%). Nutrition assessment, support and monitoring methods have changed though most centers continue to use serum proteins for assessment. Indirect calorimetry use has increased with most centers (78%) adding a ‘stress factor’ of 10 to 30% above measured energy needs. More centers provided specialized formulas including high-protein (82 vs 8.8%) and immune-enhancing (53 vs 12.3%) than in 1989. All gave a variety of vitamin and mineral supplements. Anabolic steroid and glutamine use was common (92 and 69%). Eighty percent of centers used glucose protocols with 54% having a goal of ≤120 mg/dl; another 42% used 121 to 150 mg/dl as a target. Burn dietitians reported more experience than previously documented but continued to work in other intensive care unit areas. The use of calorimetry and glucose control protocols increased in the past 20 years as did the use of anabolic steroids and supplements. Variability continued in assessment (particularly calorie estimates) and monitoring methods.