Citations

Abstract The complex three-dimensional (3D) anatomy in facial allotransplantation creates a unique challenge for surgical reconstruction. Evolution of virtual surgical planning (VSP) through computer-aided design and computer-aided manufacturing has advanced reconstructive outcomes for many craniomaxillofacial indications. Surgeons use VSP, 3D models, and surgical guides to analyze and to trial surgical approaches even prior to entering the operating room. This workflow allows the surgeon to plan osteotomies and to anticipate challenges, which improves surgical precision and accuracy, optimizes outcomes, and should reduce operating room time. We present the development, evolution, and utilization of VSP and 3D-printed guides in facial allotransplantation at our institution, from guide conception to first clinical case.

Introduction: Omentum flap is a viable reconstructive option for complex chest wall and mediastinal reconstruction. The impact of vasoconstrictors and the laminar pattern of blood flow associated with left ventricular assist devices (LVADs) on the outcomes of reconstructions has not been thoroughly evaluated. Methods: A retrospective review of all patients who underwent chest wall or mediastinal reconstruction using pedicled omentum flaps between 2003 and 2019. Results: Forty patients (60% males) underwent chest wall or mediastinal reconstruction using a pedicled omentum flap at a mean age of 58 years. The median follow-up was 24.3 months. The most common indication was the reconstruction of anterior chest wall/sternal defects (n = 16), followed by coverage of repaired bronchopleural fistula (n = 6), osteoradionecrosis of the anterolateral chest wall (n = 5), reconstruction of anterior/lateral chest wall following oncologic resections (n = 5), coverage of replaced infected LVAD (n = 4), and coverage of exposed/replaced aortic root vascular grafts (n = 4). Vasoconstrictors were used in 26 patients (65%). Eight flaps had partial necrosis, and none of the flaps had complete necrosis. There was no difference in flap complication rates in patients who received vasoconstrictors during the case compared to those who did not ( P = 1.0). Thirteen (33%) flaps were skin grafted at a median of 13 days with 100% skin graft viability. Abdominal incisional hernia developed in 8 patients. In patients with LVADs, the omentum remained viable during the follow-up period. Conclusion: The ability of the omentum to easily reach various regions in the chest and the low failure rate make this flap a reliable reconstructive method.

Summary: Advances in virtual surgical planning and three-dimensionally–printed guides have enabled increased precision in vascularized free fibula flap reconstruction of the mandible and valuable preoperative planning. However, virtual surgical planning currently requires high-resolution computed tomographic scans, exposing patients to ionizing radiation. The aim of this study was to determine whether black bone magnetic resonance imaging can be used for accurate surgical planning and three-dimensionally–printed guide creation, thus reducing patient radiation exposure. This study included 10 cadaver heads and 10 cadaver lower extremities. A mock fibula free flap for mandible reconstruction was performed. Five operations were planned with guides created using black bone magnetic resonance imaging, whereas the other five were planned and performed using guides created with computed tomographic scan data. All specimens underwent a postoperative computed tomographic scan, and three-dimensional reconstruction of scans was performed and surgical accuracy to the planned surgery was assessed. Guides created from black bone magnetic resonance imaging demonstrated high accuracy to the surgical plan. There was no statistically significant difference in postoperative deviation from the plan when black bone magnetic resonance imaging versus computed tomographic scanning was used for virtual surgical planning and guide creation. Both modalities led to a postoperative positive or negative deviation from the virtual plan within 0.8 mm. This study demonstrates that virtual surgical planning and three-dimensionally–printed guide creation for free fibula flaps for mandible reconstruction can be performed using black bone magnetic resonance imaging with comparable accuracy to computed tomographic scanning. This could reduce radiation exposure for patients and enable a more streamlined imaging process for head and neck cancer patients.

Introduction: Implantable Doppler devices are reliable adjuncts used for free flap monitoring. Occasionally, the probe/wire is not removed and remains in the soft tissues. The clinical safety of the retained probes and safety and compatibility with magnetic resonance imaging (MRI) have not been studied. We present a series of retained implantable Doppler probes examining clinic outcomes, safety and compatibility with MRI, and effect on MRI image quality. Methods: A retrospective review was conducted of patients who had an implantable Doppler device for free flap monitoring between July 2007 and August 2018. Routine post-operative imaging was reviewed for all patients to identify incidental findings of a retained probe. A subset of patients with retained implantable Doppler probes who underwent MRI was identified. Magnetic resonance images were reviewed to detect any degradation of image quality. Results: A total of 323 patients who had an implantable Doppler device placed were reviewed 18 (5.6%) patients were identified with a retained probe and were included in this study. Mean age was 49 years with mean follow-up of 34.4 months. One potential device-related complication occurred in 1 (5.6%) patient. A total of 32 MRI scans were performed in 8 patients with retained devices, including 6 patients who underwent a total of 21 MRIs of the surgical site. There were no complications related to the MRI scans, and we found no significant degradation of image quality. Conclusion: Retained implantable Doppler probes were not associated with substantial adverse clinical outcomes nor affected MRI image quality of the surgical site.

AbstractBackgroundThe non‐weight‐bearing (NWB) Achilles tendon and weight‐bearing (WB) heel pad regions are technically challenging to reconstruct with distinct functional and aesthetic considerations that have not been previously considered in the literature. This study is the first to characterize the long‐term clinical and patient‐reported outcomes of these components to better inform patients about the postreconstruction period.MethodsA retrospective review of medical records and phone‐based survey of adult patients who underwent free flap reconstruction of the heel/ankle with 6‐month minimum clinical follow‐up was performed.ResultsForty‐three patients, with 31 (72.1%) NWB and 12 (27.9%) WB defects, treated from January 1, 2000 to February 28, 2017 were included. Muscle flaps were more common than fasciocutaneous flaps (N = 36 [83.7%] vs. 7 [16.3%]). Flap survival rate was 95.3% and limb salvage rate was 93.0% at median follow‐up of 12.0 months (interquartile range [IQR] 6.2, 25.5). Flap ulceration occurred more frequently in the WB region (41.7 vs. 6.5%, p = .0123). The survey response rate was 63.6%. The majority of patients complete daily tasks with no/little impairment (76.2%), walk half a mile or more (85.7%), returned to work (86.6%), and fit shoes “fair” or “well” (71.4%). Most patients were “very satisfied” with heel/ankle function (71.4%) and would “very likely” undergo the same procedure if needed (76.2%).ConclusionsFree flap reconstruction in both the NWB Achilles tendon and WB heel pad has excellent limb salvage and flap survival rates. Patients were satisfied with heel/ankle function, but additional counseling is recommended for variance in appearance and higher ulceration rates in WB defects.

Background: The frequency, pattern, and treatment of pediatric hand fractures are rarely reported. We sought to review our institution’s experience in the management of pediatric hand fractures. Methods: A retrospective review of children and adolescents (younger than 18 years) treated for hand fractures between January 1990 and June 2017 was preformed. Fractures were categorized into metacarpal, proximal/middle phalanx, distal phalanx, or intra-articular metacarpophalangeal (MCP)/proximal interphalangeal (PIP)/distal interphalangeal (DIP) fractures. Patients were categorized into 3 age groups (0-5, 6-11, and 12-17 years). Results: A total of 4356 patients were treated for hand fractures at a mean ± SD age of 12.2 ± 3.5 years. Most fractures occurred in patients aged 12 to 17 years (n = 2775, 64%), followed by patients aged 6 to 11 years (n = 1347, 31%). Only 234 (5%) fractures occurred in children younger than 5 years. Most fractures occurred in the proximal/middle phalanx (48%), followed by metacarpal (33%), distal phalangeal (12%), and intra-articular MCP/PIP/DIP joints (7%). Proximal/middle phalangeal fractures were the most common in all age groups. About 58% of intra-articular MCP/PIP/DIP fractures in patients aged between 0 and 5 years required open reduction ± fixation, and the remaining 42% fractures were amenable to closed reduction. In patients older than 5 years, about 70% of these fractures were amenable to closed reduction. All age groups included, most metacarpal (93%), proximal/middle phalangeal (92%), and distal phalangeal (86%) fractures were amenable to closed reduction alone. Conclusions: The frequency, pattern, and treatment of hand fractures vary among different age groups. Understanding the pattern of these fractures helps making the right diagnosis and guides choosing the appropriate treatment.