Cynthia H. Shields

Multicenter, Randomized, Comparative Cost-effectiveness Study Comparing 0, 1, and 2 Diagnostic Medial Branch (Facet Joint Nerve) Block Treatment Paradigms before Lumbar Facet Radiofrequency Denervation

Background:Among patients presenting with axial low back pain, facet arthropathy accounts for approximately 10–15% of cases. Facet interventions are the second most frequently performed procedures in pain clinics across the United States. Currently, there are no uniformly accepted criteria regarding how best to select patients for radiofrequency denervation. Methods:A randomized, multicenter study was performed in 151 subjects with suspected lumbar facetogenic pain comparing three treatment paradigms. Group 0 received radiofrequency denervation based solely on clinical findings; group 1 underwent denervation contingent on a positive response to a single diagnostic block; and group 2 proceeded to denervation only if they obtained a positive response to comparative blocks done with lidocaine and bupivacaine. A positive outcome was predesignated as ≥50% pain relief coupled with a positive global perceived effect persisting for 3 months. Results:In group 0, 17 patients (33%) obtained a successful outcome at 3 months versus eight patients (16%) in group 1 and 11 (22%) patients in group 2. Denervation success rates in groups 0, 1, and 2 were 33, 39, and 64%, respectively. Pain scores and functional capacity were significantly lower at 3 months but not at 1 month in group 2 subjects who proceeded to denervation compared with patients in groups 0 and 1. The costs per successful treatment in groups 0, 1, and 2 were

Pediatric Wartime Admissions to US Military Combat Support Hospitals in Afghanistan and Iraq: Learning from the First 2,000 Admissions

6,286,

Back Pain During War: An Analysis of Factors Affecting Outcome

17,142, and

Clinical Utility of the Bispectral Index Score When Compared to the University of Michigan Sedation Scale in Assessing the Depth of Outpatient Pediatric Sedation

15,241, respectively. Conclusions:Using current reimbursement scales, these findings suggest that proceeding to radiofrequency denervation without a diagnostic block is the most cost-effective treatment paradigm.

Intraoperative management: peripheral vascular surgery

BACKGROUNDnHumanitarian and civilian emergency care accounts for up to one-third of US military combat support hospital (CSH) admissions. Almost half of these admissions are children. The purpose of this study is to describe the features of pediatric wartime admissions to deployed CSHs in Iraq and Afghanistan.nnnMETHODSnA retrospective database review was conducted using the Patient Administration Systems and Biostatistics Activity. Details of 2,060 pediatric admissions to deployed CSHs were analyzed.nnnRESULTSnNontraumatic diagnoses were responsible for 25% of all pediatric admissions. Penetrating injuries (76.3%) dominate the trauma admissions. The primary mechanisms of injury were gunshot wound (39%) followed by explosive injuries (32%). Categorizing the injuries by location revealed 38.3% extremity wounds, 23.6% torso injuries, 23.5% head, face, and neck injuries, and 13.3% burns. More than half of the children required two or more invasive or surgical procedures, 19.8% needed a transfusion, and 5.6% required mechanical ventilation. The mortality rate was 6.9%. The primary cause of death involved head trauma (29.5%) and burns (27.3%), followed by infectious diagnoses (7.2%). The case fatality rate for head injury and burn patients was 20.1% and 15.9%, respectively, in contrast to the fatality rate for all other diagnoses at 3.8% (p < 0.01). Excluding emergency department deaths, mortality rates for Afghanistan (6.2%) and Iraq (3.9%) significantly differ (p < 0.02).nnnCONCLUSIONnPediatric patients account for approximately 10% of all CSH admissions in Afghanistan and Iraq. Burns and penetrating head injury account for the majority of pediatric mortality at the CSH.

Pediatric Thoracic Trauma in Iraq and Afghanistan

BACKGROUNDnBack pain is the leading cause of disability in the world, but it is even more common in soldiers deployed for combat operations. Aside from battle injuries and psychiatric conditions, spine pain and other musculoskeletal conditions are associated with the lowest return-to-unit rate among service members medically evacuated out of Operations Iraqi and Enduring Freedom.nnnMETHODSnDemographic, military-specific, and outcome data were prospectively collected over a 2-week period at the Deployed Warrior Medical Management Center in Germany on 1410 consecutive soldiers medically evacuated out of theaters of combat operations for a primary diagnosis pertaining to back pain between 2004 and 2007. The 2-week period represents the maximal allowable time an evacuated soldier can spend in treatment before disposition (ie, return to theater or evacuate to United States) is rendered. Electronic medical records were then reviewed to examine the effect a host of demographic and clinical variables had on the categorical outcome measure, return to unit.nnnRESULTSnThe overall return-to-unit rate was 13%. Factors associated with a positive outcome included female sex, deployment to Afghanistan, being an officer, and a history of back pain. Trends toward not returning to duty were found for navy and marine service members, coexisting psychiatric morbidity, and not being seen in a pain clinic.nnnCONCLUSIONSnThe likelihood of a service member medically evacuated out of theater with back pain returning to duty is low irrespective of any intervention(s) or characteristic(s). More research is needed to determine whether concomitant treatment of coexisting psychological factors and early treatment in theater can reduce attrition rates.

Using high-fidelity patient simulation and an advanced distance education network to teach pharmacology to second-year medical students ☆

This single blinded observational study compared the bispectral index (BIS) monitor with a validated pediatric sedation scale, the University of Michigan Sedation Scale (UMSS), to evaluate whether the BIS score can be used to judge the depth of sedation in pediatric outpatients. Thirty-eight children, with a mean age of 5.8 years, undergoing routine sedation for both noninvasive and gastrointestinal procedures, had simultaneous BIS and UMSS scores recorded. Sedation categories were defined as light, moderate, and deep for both UMSS and BIS. There was a moderate correlation between BIS and the UMSS, Spearman’s r <- 0.499. The correlation was poor for children receiving chloral hydrate, r < -0.213. The BIS score was not predictive of any specific UMSS score. The UMSS and BIS categories of sedation matched only 36% of the time. BIS underestimated the clinical level of sedation.

Sleep Deprivation for Pediatric Sedated Procedures: Not Worth the Effort

Lower extremity atherosclerotic disease affects nearly 10 million people in the United States. Recent advances in diagnostic imaging and interventional techniques help many patients avoid more invasive surgical procedures. Those reaching the operating room, however,represent a distilled subset of patients who are prone to significant comorbidities. We outline current treatment strategies and discuss anesthetic concerns and techniques for these complex patients.

Validation of the BIS monitor during conscious sedation and deep sedation in children.

IntroductionnThe objective of this study is to review available data on pediatric thoracic trauma seen at U.S. military treatment facilities in Iraq and Afghanistan and describe the scope of injuries, patterns seen, and associated mortality. The results were compared with adults injured in Iraq and Afghanistan and other reports of pediatric thoracic trauma in the literature.nnnMaterials and MethodsnThe investigators received approval from the Uniformed Services University of the Health Sciences institutional review board before the study. The Joint Theatre Trauma Registry was queried for all patients with an ICD-9 code for thoracic trauma. Two-tailed Students t-test, Mann-Whitney rank sum, χ2, ANOVA, or multiple logistic regression was used as indicated.nnnResultsnThere were 955 patients under the age of 18 yr, just over 12% of all thoracic trauma. Penetrating injuries were common (73.6%), including gunshot wounds. The most common pediatric diagnoses were contusions (45%), pneumothorax (40%), and rib and/or sternal fractures (18%). The overall mortality for children was 15.2% compared with 13.8% and 9% for civilian adults and Coalition members with thoracic trauma, respectively. Mortality was inversely related to age among pediatric patients. Children under 2 yr of age had the highest mortality (25.1%). Patients under 12 yr of age were more likely to die than those between 12 and 18 (OR 2.02, 95% CI 1.27-3.22) yr. Thoracic vascular injuries and cardiac injuries resulted in the highest mortality among pediatric patients. The presence of a hemothorax was independently associated with an increased risk for mortality (OR 1.78, 95% CI 1.06-2.99) as was a concomitant head injury (OR 2.17, 95% CI 1.33-3.54). There was a 2.7% incidence of burns among pediatric patients with a high associated mortality (46.2%). Nearly one-half of all the children identified required a transfusion (47%).nnnConclusionnPenetrating injuries predominated and these children commonly required a transfusion. Mortality was inversely related to age. Children with a hemothorax or a concomitant head injury had significant increases in mortality. Children with thoracic injury as the result of a burn suffered the highest mortality.