Search

PURPOSE OF REVIEW: Proximal femur fractures are common traumatic injuries treated by orthopedic surgeons. Preparation and positioning for surgical intervention are critical in the proper management of proximal femur fractures. The purpose of this study was to review the current evidence on the various positioning options for patients and to highlight the principles and emerging techniques to help orthopedic surgeons treat this common injury. RECENT FINDINGS: Strategic patient positioning is key to the reduction and fixation of proximal femur fractures without complications. The use of intramedullary devices for the fixation of proximal femur fractures has led to an increased use of the modern fracture table. The fracture table should be used when surgeons are facile with its use to avoid significant complications. Recent best available evidence has suggested increased risk of malrotation associated with the use of the fracture table. The use of the radiolucent table offers the most flexibility, but limits surgeons as multiple assistants are needed to maintain reduction during fixation. SUMMARY: Positioning for proximal femur fractures is an important technique for general and trauma orthopedic surgeons. Surgeons need to be aware of the various techniques for positioning of proximal femur fractures due to the diversity of injury patterns and patient characteristics. Each positioning technique has it benefits and potential complications that every orthopaedic surgeon should be familiar with while treating these injuries. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s12178-021-09710-x.

Background Management of scaphoid fractures often requires advanced imaging to achieve accurate diagnoses and appropriate treatment. Digital tomosynthesis (DTS) is a cross-sectional imaging modality that may be used to substitute magnetic resonance imaging or computed tomographic scans. The purpose of this study is to: (1) determine the diagnostic accuracy of DTS in occult scaphoid fractures; and (2) report on the reduction of other advanced imaging when using DTS. Methods From May 2014 to October 2017, the charts of all patients who underwent scaphoid tomogram were retrospectively reviewed. The diagnostic accuracy of DTS for occult fracture was compared with 2-week follow-up plain films. To measure the reduction in utilization of advanced imaging, it was determined whether DTS eliminated the need for advanced imaging by providing adequate information regarding the clinical question. Results A total of 78 patients underwent scaphoid tomography in this time frame: 39 for occult fracture, 33 for fracture union, 5 for fracture morphology, and 1 for hardware positioning. For the detection of occult fracture, DTS had a sensitivity of 100%, specificity of 83%, positive predictive value of 64%, and negative predictive value of 100%. Advanced imaging was not used in 35 of the remaining 39 patients based on the results obtained by DTS. In patients who did receive advanced imaging, 83% of tomograms provided conclusive diagnostic information. Conclusions Digital tomosynthesis increases the diagnostic sensitivity of occult scaphoid fractures, reducing unnecessary immobilization and advanced imaging. Digital tomosynthesis provides clinical detail beyond plain film, which reduces the need to obtain advanced imaging when assessing union, fracture pattern, and hardware placement.

Background Traumatic arthrotomy of the wrist is most commonly detected using the saline load test (SLT); however, little data exists on the effectiveness of the SLT to this specific joint. The use of computed tomography (CT) scan has been validated as an alternative method to detect traumatic arthrotomy of the knee, as the presence of intra-articular air can be seen when there is violation of the joint capsule. Question/Purpose The purpose of this study was to determine the ability of CT scan to identify arthrotomy of the wrist capsule and compare the diagnostic performance of CT versus traditional SLT. Materials and Methods Ten fresh frozen cadavers which had undergone transhumeral amputation were initially used in this study. A baseline CT scan was performed to ensure no intra-articular air existed prior to intervention. After baseline CT, an arthrotomy was created at the 6R radiocarpal portal site. The wrists then underwent a postarthrotomy CT to identify the presence or absence of intra-articular air. Following CT, the wrists were subjected to the SLT to detect the presence of extravasation from the arthrotomy. Results Nine cadavers were included following baseline CT scan. Following arthrotomy, intra-articular air was visualized in eight of the nine cadavers in the postarthrotomy CT scan. Air was seen in the radiocarpal joint in eight of the nine wrists; midcarpal joint in seven of the nine wrists; and distal radioulnar joint in six of the nine wrists. All wrists (nine of the nine) demonstrated extravasation during the SLT. The mean volume of extravasation occurred at 3.7 mL (standard deviation = 2.6 mL), with a range of 1 to 7 mL. Conclusion CT scan correctly identified eight of the nine simulated traumatic arthrotomies. Injection of 7 mL during the SLT was necessary to identify 100% of the arthrotomies. Clinical Relevance CT scan is a sensitive modality for detection of traumatic arthrotomy of the wrist in a cadaveric model.

Background: The induced membrane technique was originally described as a technique for the reconstruction of long bone defects. The authors performed a systematic review to determine whether the use of the induced membrane technique is effective in large bony defects in the upper extremity. Methods: A qualitative systematic review was conducted using PubMed, EBSCO, and Google Scholar databases to record all studies reporting on complications of the induced membrane technique in the upper extremity. Studies written after 1990 in English language journals met the inclusion criteria. Exclusion criteria were non-English language publications, animal studies, failure to identify the location of the bone defect, failure to identify whether complications were associated with the procedure, and failure to define the length of bone defect. Results: A total of 1422 studies were identified in the original search. Twelve studies satisfied the criteria for inclusion. A total of 70 patients with 83 upper extremity cases were reported: 1 proximal interphalangeal joint, 22 phalanges, 8 metacarpals, 37 forearms, 14 humeri, and 1 clavicle. The mean bone defect size was 4.0 cm (SD, 1.5). The most common complication was infection. We found that complication rates were independent of the location of the bone defect. Complication rates in the upper extremity ranged from 0% to 100%, with a total weighted mean of 10%. Conclusion: The induced membrane technique is an emerging possible treatment of large bone defects in the upper extremity. More research is needed to determine the outcomes of the induced membrane technique in the upper extremity.