Eastern Association for the Surgery of Trauma Multicenter Trial: Comparison of pre-injury antithrombotic use and reversal strategies among severe traumatic brain injury patients

BACKGROUND

Trauma teams are often faced with patients on antithrombotic (AT) drugs, which is challenging when bleeding occurs. We sought to compare the effects of different AT medications on head injury severity and hypothesized that AT reversal would not improve mortality in severe traumatic brain injury (TBI) patients.

METHODS

An Eastern Association for the Surgery of Trauma-sponsored prospective, multicentered, observational study of 15 trauma centers was performed. Patient demographics, injury burden, comorbidities, AT agents, and reversal attempts were collected. Outcomes of interest were head injury severity and in-hospital mortality.

RESULTS

Analysis was performed on 2,793 patients. The majority of patients were on aspirin (acetylsalicylic acid [ASA], 46.1%). Patients on a platelet chemoreceptor blocker (P2Y12) had the highest mean Injury Severity Score (9.1 ± 8.1). Patients taking P2Y12 inhibitors ± ASA, and ASA-warfarin had the highest head Abbreviated Injury Scale (AIS) mean (1.2 ± 1.6). On risk-adjusted analysis, warfarin-ASA was associated with a higher head AIS (odds ratio [OR], 2.43; 95% confidence interval [CI], 1.34-4.42) after controlling for Injury Severity Score, Charlson Comorbidity Index, initial Glasgow Coma Scale score, and initial systolic blood pressure. Among patients with severe TBI (head AIS score, ≥3) on antiplatelet therapy, reversal with desmopressin (DDAVP) and/or platelet transfusion did not improve survival (82.9% reversal vs. 90.4% none, p = 0.30). In severe TBI patients taking Xa inhibitors who received prothrombin complex concentrate, survival was not improved (84.6% reversal vs. 84.6% none, p = 0.68). With risk adjustment as described previously, mortality was not improved with reversal attempts (antiplatelet agents: OR 0.83; 85% CI, 0.12-5.9 [p = 0.85]; Xa inhibitors: OR, 0.76; 95% CI, 0.12-4.64; p = 0.77).

CONCLUSION

Reversal attempts appear to confer no mortality benefit in severe TBI patients on antiplatelet agents or Xa inhibitors. Combination therapy was associated with severity of head injury among patients taking preinjury AT therapy, with ASA-warfarin possessing the greatest risk.

LEVEL OF EVIDENCE

Prognostic, level II.

Analysis of Plasma Products for Cellular Contaminants: Comparing Standard Preparation Methods

BACKGROUND

Recent reports suggest that component plasma products contain significant quantities of cellular contamination. We hypothesized that leukoreduction of whole blood before preparation of derived plasma is an effective method to prevent cellular contamination of stored plasma.

STUDY DESIGN

Samples of never-frozen liquid plasma prepared by standard methods (n = 25) were obtained from 3 regional blood centers that supply 3 major trauma centers. Samples were analyzed for leukocyte and platelet contamination by flow cytometry. To determine if leukoreduction of whole blood before centrifugation and expression of plasma prevents cellular contamination of liquid plasma, 1 site generated 6 additional units of liquid plasma from leukoreduced whole blood, which were then compared with units of liquid plasma derived by standard processing.

RESULTS

Across all centers, each unit of never-frozen liquid plasma contained a mean of 12.8 ± 3.0 million leukocytes and a mean of 4.6 ± 2 billion platelets. Introduction of whole blood leukoreduction (LR) before centrifugation and plasma extraction essentially eliminated all contaminating leukocytes (Non-LR: 12.3 ± 2.9 million vs LR: 0.05 ± 0.05 million leukocytes) and platelets (Non-LR: 4.2 ± 0.3 billion platelets vs LR: 0.00 ± 0.00 billion platelets).

CONCLUSIONS

Despite widespread belief that stored plasma is functionally acellular, testing of liquid plasma from 3 regional blood banks revealed a significant amount of previously unrecognized cellular contamination. Introduction of a leukoreduction step before whole blood centrifugation essentially eliminated detectable leukocyte and platelet contaminants from plasma. Therefore, our study highlights a straightforward and cost-effective method to eliminate cellular contamination of stored plasma.

Incorporation of the Transverse Thoracic Plane Block Into a Multimodal Early Extubation Protocol for Cardiac Surgical Patients

Background

The aim for early extubation remains an important goal in cardiac surgical patients. Therefore, employment of a multimodal approach to pain management that includes a transverse thoracic plane block was retrospectively examined at a single-center tertiary care hospital on the effects of time to extubation, opioid consumption, and length of stay in patients undergoing cardiac surgery via median sternotomy.

Methods

Blocks were performed on all cardiac surgical patients except for those undergoing left ventricular assist device placement, thoracic transplant, emergent surgery, or redo sternotomy. Following additional exclusions for intra- and postoperative complications unrelated to anesthesia, final analysis was conducted on 75 patients per group. Multimodal pain management included intravenous analgesics and transverse thoracic plane block where patients received 15 mL 0.5% bupivacaine + epinephrine bilaterally under ultrasound guidance prior to incision.

Results

Following transverse thoracic plane block and multimodal analgesics, 50.6% of patients were extubated in the operation room versus 8.6% in the control group. Intraoperative opioids were decreased, and intensive care unit and total length of stay were reduced by 5 hours and 1 day, respectively, in block patients as compared with controls. Postoperative opioids were not significantly different. There were no reported complications directly attributed to the block.

Conclusions

The transverse thoracic plane block and multimodal regimen for patients undergoing median sternotomy resulted in a significant number of patients extubated in the operation room without an increase in postoperative re-intubations. Moreover, the block appears to be a quick and safe procedure to utilize on cardiac surgery patients.

Plasma Transfusion Products and Contamination with Cellular and Associated Pro-Inflammatory Debris

BACKGROUND

Stored plasma products are widely regarded as being functionally acellular, obviating the need for leukoreduction. We tested the hypothesis that donor plasma is contaminated by leukocytes and platelets, which, after frozen storage, would release cellular debris in quantities sufficient to elicit significant pro-inflammatory responses.

STUDY DESIGN

Samples of never-frozen liquid plasma from 2 regional Level I trauma centers were analyzed for leukocyte and platelet contamination. To determine if the cellular contamination and associated debris found in liquid plasma were at levels sufficient to evoke an innate immune response, known quantities of leukocytes were subjected to a freeze-thaw cycle, added to whole blood, and the magnitude of the inflammatory response was determined by induction of interleukin-6.

RESULTS

Units of never-frozen plasma from 2 regional Level I trauma centers located in Alabama and Louisiana contained significant amounts of leukocyte contamination (Louisiana, n = 22; 17.3 ± 4.5 million vs Alabama, n = 22; 11.3 ± 2.2 million) and platelet contamination (Louisiana, n = 21; 0.86 ± 0.20 billion vs Alabama, n = 22; 1.0 ± 0.3 billion). Cellular debris from as few as 1 million leukocytes induced significant increases in interleukin-6 levels (R² = 0.74; p < 0.0001).

CONCLUSIONS

Stored plasma units from trauma center blood banks were highly contaminated with leukocytes and platelets, at levels more than 15-fold higher than sufficient to elicit ex vivo inflammatory responses. In light of paradigm shifts toward the use of more empiric plasma for treatment of hypovolemia, this study suggests that new manufacturing and quality-control processes are needed to eliminate previously unrecognized cellular contamination present in stored plasma products.

Effect of Lymphedema Treatment for Management of Acute Pilon Fractures

Pilon fractures are high-energy injuries that often result in considerable edema and compromise of the soft tissue envelope of the ankle. These injuries are typically staged with an external fixator until the soft tissue is amenable for definitive fixation. This study was conducted to determine the effects of lymphedema treatment for the management of pilon fractures. Patients who underwent open reduction and internal fixation of pilon fractures between 2007 and 2014 at the authors' level II trauma center were identified by Current Procedural Terminology codes indicative of placement of an external fixator (20690) and open reduction and internal fixation of a pilon fracture (27826, 27827, or 27828). The primary efficacy endpoint to determine negative outcomes was 90 days after definitive fixation. Eighty-two patients with 84 pilon fractures met inclusion criteria. Forty-eight ankles (57%) received lymphedema treatment. There were no significant differences in population demographics between the control and treatment groups. Median times to internal fixation in the control and treatment groups were 20 days (inter-quartile range, 15.5-30 days) and 11 days (interquartile range, 6-18 days), respectively. This difference was statistically significant (P=.001). Additionally, there was no significant difference in the overall incidence of wound complications between the control and treatment groups (P=.246). Compression wrapping for posttraumatic edema was effective in reducing the time needed for soft tissues to be appropriate for definitive surgical fixation of pilon fractures without increasing the risk of wound complications. These promising results warrant future study. [Orthopedics. 2017; 40(4):e668-e674.].

Butoconazole nitrate

Imidazoles and their derivatives have been proven very effective in the treatment of fungal infections. Butoconazole nitrate is an important addition to this class of antifungal agents. It was introduced to the market in for the short-term management of vaginal infections caused by Candida species. It has high activity, against Candida albicans in vitro and is very effective clinically.

Butoconazole nitrate is an imidazole derivative with potent antifungal activity in vivo and in vitro (Figure). When synthesized, it exists as a racemic mixture in which both components are optical isomers and equally active.