Preoperative Management of Antithrombotics in Arthroplasty.

Antithrombotic therapy is common in the arthroplasty patient population; the preoperative management of chronic antithrombotic medications requires coordination among the medical team. It is estimated that approximately 250,000 or 10% of patients on chronic antithrombotic medication undergo treatment interruption for surgical procedures annually in North America. Although the description of postoperative anticoagulation management after arthroplasty is extensive, orthopaedic literature describing the preoperative management of antithrombotic therapy is lacking. The goal of this guideline is to provide practicing orthopaedic surgeons concise recommendations for the preoperative management of common contemporary antithrombotics in the setting of elective arthroplasty using evidence-based guidelines from other medical specialties. All arthroplasty procedures are considered high bleeding risk in accordance with collaborative AAOS and ACC guidelines. Orthopaedic surgeons should collaborate with their colleagues in cardiology, anesthesia, and other specialties when planning perioperative antithrombotic interruption, particularly in the case of medically complex patients such as those with known risk factors for bleeding and clotting disorders. Resumption of antithrombotic therapy after arthroplasty is beyond the scope of this discussion; this should be performed in accordance with cardiology and anesthesia recommendations.

The "Top 10" research and development priorities for battlefield surgical care: Results from the Committee on Surgical Combat Casualty Care research gap analysis.

BACKGROUND: The US Military has achieved the highest casualty survival rates in its history. However, there remain multiple areas in combat trauma that present challenges to the delivery of high-quality and effective trauma care. Previous work has identified research priorities for pre-hospital care, but there has been no similar analysis for forward surgical care. METHODS: A list of critical "focus areas" was developed by the Committee on Surgical Combat Casualty Care (CoSCCC). Individual topics were solicited and mapped to appropriate focus areas by group consensus and review of Eastern Association for the Surgery of Trauma (EAST) and Joint Trauma System guidelines. A web-based survey was distributed to the CoSCCC and the military committees of EAST and the American Association for the Surgery of Trauma. Topics were rated on a Likert scale from 1 (low) to 10 (high priority). Descriptives, univariate statistics, and inter-rater correlation analysis was performed. RESULTS: 13 research focus areas were identified (eight clinical and five adjunctive categories). Ninety individual topics were solicited. The survey received 64 responses. The majority of respondents were military (90%) versus civilians (10%). There was moderate to high agreement (inter-rater correlation coefficient = 0.93, p < 0.01) for 10 focus areas. The top five focus areas were Personnel/Staffing (mean, 8.03), Resuscitation and Hemorrhage Management (7.49), Pain/Sedation/Anxiety Management (6.96), Operative Interventions (6.9), and Initial Evaluation (6.9). The "Top 10" research priorities included four in Personnel/Staffing, four in Resuscitation/Hemorrhage Management, and three in Operative Interventions. A complete list of the topics/scores will be presented. CONCLUSIONS: This is the first objective ranking of research priorities for combat trauma care. The "Top 10" priorities were all from three focus areas, supporting prioritization of personnel/staffing of austere teams, resuscitation/hemorrhage control, and damage-control interventions. This data will help guide Department of Defense research programs and new areas for prioritized funding of both military and civilian researchers. LEVEL OF EVIDENCE: Study design, level IV.

Nutritional Support Using Enteral and Parenteral Methods.

The purpose of this Clinical Practice Guideline is to provide an approach for optimal nutritional support in the postinjury period for those injured in combat. Indications and contraindications for enteral and parenteral nutrition are addressed. Timing of nutritional support, nutritional goals, energy requirements, and ideal formula selection for various types of traumatic injuries are addressed. Challenges encountered providing nutrional support for the traumatically injured in the deployed environment are also discussed.

Perioperative Gabapentin Improves Patient-Centered Outcomes After Inguinal Hernia Repair.

INTRODUCTION: Over 5,300 inguinal hernia repairs (IHR) were performed in the Military Health System in 2015. Chronic pain can be a debilitating complication, occurring in up to 34% of patients after IHR and impacts mission readiness. Gabapentin has been shown to be effective for postoperative analgesia in a variety of operations. We evaluated the effect of a short course of perioperative gabapentin on chronic pain after IHR. METHODS: This was a double-blinded, randomized study involving male patients ≥18 years old with an initial inguinal hernia and no history of chronic pain or psychiatric disorder. Patients chose laparoscopic or open surgery and were then randomized to receive gabapentin 300 mg before surgery, then three times daily for 6 doses or placebo. There were 50 patients randomized to both the gabapentin and placebo groups for a total of 100 patients. Main outcomes were pain and health status, assessed with a visual analogue scale (VAS) and the Short Form-12v2 (SF-12v2). Assessments were performed preoperatively and 1, 6, 12, and 24 months postoperatively. Analysis of variance was used to compare groups. RESULTS: From the initial 100 patients, 19 withdrew or were excluded. Thus, 81 patients remained, 40 receiving gabapentin and 41 placebo. Throughout the 24-month follow-up, there was no difference in VAS pain scores between the gabapentin and placebo groups (p = 0.867). Beyond 1 month of follow-up, SF-12v2 physical component score (PCS) scores were improved in the gabapentin group (p = 0.039). When comparing open to laparoscopic groups, SF-12v2 PCS scores were improved in the laparoscopic group (p = 0.046) and SF-12v2 mental component summary scores were improved in the open group (p = 0.041). CONCLUSIONS: Perioperative gabapentin was not effective in decreasing chronic pain after IHR; however, patient perception of physical health, as measured by SF-12v2, did improve.

Venous thromboembolism after traumatic amputation: an analysis of 366 combat casualties.

BACKGROUND: We sought to determine the incidence, risk factors, and time course for deep vein thrombosis and pulmonary embolism (DVT/PE) after combat-related major limb amputations. METHODS: Patients with amputation in Iraq or Afghanistan from 2009 through 2011 were eligible. Details of postinjury care, date of diagnosis of DVT/PE, and injury specific data were collected. Military databases and chart reviews were used. RESULTS: In 366 patients, 103 (28%) had DVT/PE; PE was diagnosed in 59 (16%) and DVT in 59 (16%). Most DVT (69%) and PE (66%) occurred within 10 days. Increasing ventilator days (odds ratio [OR], 1.97; 95% CI, 1.16 to 3.37) and units of blood transfused (OR, 1.72; 95% CI, 1.11 to 2.68) were associated with DVT. Increasing units of fresh-frozen plasma were associated with PE (OR, 1.31; 95% CI, 1.10 to 1.55). CONCLUSIONS: The incidence of DVT/PE is high after combat-related amputation. Most DVT/PE occur early and prophylaxis is indicated.

Fibrinogen and prothrombin complex concentrate in trauma coagulopathy.

BACKGROUND: Coagulopathy after injury contributes to hemorrhage and death. Treatment with specific coagulation factors could decrease hemorrhage and mortality. Our aim was to compare fibrinogen and prothrombin complex concentrate (PCC) in a rabbit model of hemorrhagic shock. MATERIALS AND METHODS: New Zealand white rabbits were anesthetized. Blood was withdrawn to a mean arterial pressure (MAP) of 30-40 mm Hg for 30 min. Animals were resuscitated with lactated Ringer to a MAP of 50-60 mm Hg and randomized to receive 100 mg/kg of fibrinogen, PCC 25 IU/kg, or lactated Ringer. A liver injury was created. A MAP of 50-60 mm Hg was maintained for 60 min. The primary outcome was blood loss, and secondary outcomes were fluid administered and coagulopathy as measured by plasma-based tests. RESULTS: There were eight animals in each group. Median blood loss was significantly higher in the fibrinogen group, at 122 mL (95% confidence interval [CI], 75-194), when compared with that in the control group, 35 mL (95% CI, 23-46; P value = 0.001), and the PCC group, 26 mL (95% CI, 4-54; P value = 0.002). Resuscitation fluid requirement was highest in the fibrinogen group, at 374 mL (95% CI, 274-519), and lowest in the PCC group, at 238 mL (95% CI, 212-309) (P = 0.01). Plasma-based coagulation tests were not different among groups. CONCLUSIONS: In a rabbit model, PCC did not have a significant effect on blood loss. Fibrinogen increased blood loss and fluid requirements.

Fever evaluation cost and time to treatment in the general surgery patient can be reduced by using a fever practice guideline.

OBJECTIVES: Evaluation of surgical patients with fever and leukocytosis (FAL) for an infection source often results in unnecessary laboratory and radiographic tests. The average cost of an FAL work-up ranges from $2200 to $5600. Lack of a systematic approach drives costs higher than necessary. We evaluated differences in time to treatment and costs using usual methods of FAL work-ups versus FAL work-ups using an established fever practice guideline (FPG). METHODS: In phase I, a retrospective electronic chart review was conducted for 82 adult surgery patients who underwent FAL work-ups to determine time from initial temperature presentation to fever treatment and total cost per fever evaluation. In phase II, an established FPG was applied to 30 intensive care unit patients from the original group of 82 using phase I data points. Differences in cost and time to treatment were compared using a paired t-test. RESULTS: Mean time to fever treatment decreased from 51.57 hours pre-FPG use to 11.23 hours afterward (p < 0.001), a 78% reduction in time to definitive treatment. Mean cost of FAL work-up decreased from $1,009.73 without FPG use to $399.00 with a 60% reduction in costs. CONCLUSIONS: Using a standardized FPG, FAL work-up time to treatment and cost can be significantly reduced.

Prognostic significance of lower extremity long bone fractures after automobile versus pedestrian injuries.

BACKGROUND: Fractures of the tibia and femur are common after automobile versus pedestrian (AVP) injuries. This study evaluates the effect of age on the type of fracture and the incidence and type of associated injuries. METHODS: All patients involved in an AVP crash from January 1, 1995, through June 30, 2006, were included in the study. Variables obtained from our trauma registry included age, gender, Injury Severity Score, Abbreviated Injury Scale, intra-abdominal and spine injuries, and mortality. Patients were divided into three age groups for analysis: younger than 15 years, 15 years to 55 years, and older than 55 years. The incidence and type of associated injuries were assessed according to the presence or absence of fractures of the tibia only, femur only, or combined femur and tibia fractures. RESULTS: A total of 6,652 patients had AVP crashes and 1,936 (29%) had tibia or femur fractures (tibia, 20%; femur, 7%; tibia/femur, 3%). The incidence of tibia fractures increased with age ranging from 13% in those younger than 15 years to 25% in those older than 55 (p < 0.001). Combined tibia and femur fractures were also more common in adults and isolated femur fractures were more common in children. Hollow viscus injury was 1.8% in those with lower extremity fractures and 0.9% in those without (p = 0.0013). Mortality was 10% in those with fractures and 6% in those without (p < 0.0001) and was 20% in those with tibia and femur fractures. CONCLUSIONS: Age affects the incidence and type of lower extremity fractures after AVP injuries. The presence of lower extremity fracture is associated with a higher incidence of chest, spine, and intra-abdominal injuries. It is advisable that all patients with lower extremity fractures after AVP injuries be evaluated by a surgeon familiar with these injury patterns.

Intracranial pressure monitoring in severe isolated pediatric blunt head trauma.

Very little research regarding standard treatments for pediatric traumatic brain injury (PTBI) exists. The objective of this study was to examine the use of intracranial pressure (ICP) monitoring devices in PTBI and to determine if its use was associated with any outcome benefit. Data were collected from the Trauma Registry over an 11-year period (1996-2006) on all blunt trauma pediatric patients (age < 14 years) with an initial Glasgow Coma Scale score < or =8. Data collected included: demographics, admission Glasgow Coma Scale score, mechanism of injury, Injury Severity Score, Abbreviated Injury Score, and use of an ICP monitor. Outcome measures included: mortality, complications, discharge location, and capacity. Thirty-three (25%) of 129 blunt PTBI patients had ICP monitors placed. Patients with monitors were more severely injured overall (Injury Severity Score: 25 vs. 18, P = 0.001) and had more severe head injury (81% head Abbreviated Injury Score > 3 vs. 55%, P = 0.01) than patients without monitors. However, there was no difference in mortality (28% vs. 35%, P = 0.52), discharge location (P = 0.10), and discharge capacity (P = 0.84). After multivariable analysis to adjust for the differences between the two study groups, the use of ICP monitor provided no survival benefit (adjusted odds ratio: 1.1; 95% confidence interval [CI]: 0.3-4.1; adjusted P value = 0.85). The use of ICP monitor was, however, independently associated with a higher risk of developing extracranial complications (adjusted odds ratio: 4.3; 95% CI: 1.2-16.4; adjusted P value = 0.025). In conclusion, the use of ICP monitors in pediatric patients with severe isolated head injury provided no survival benefit and was associated with an increased risk of complications.