Bone Union of Osseous Microvascular Free Tissue Transfer in Mandibular Reconstruction

Objectives Osseous microvascular free tissue transfer (MFTT) is the gold standard for reconstruction for most segmental mandibulectomy defects. The most common osseous MFTT utilized in reconstruction is the fibular, scapular, and osteocutaneous radial forearm (OCRF) free flap. We evaluated postoperative bone union as well as clinical complications following MFTT and the impact of various patient and reconstructive characteristics, including type of osseous MFTT. Study Design Retrospective cohort study. Setting Tertiary care academic hospital. Methods This study examined patients who underwent osseous MFTT for mandibular defects from January 2017 to January 2019. Results An overall 144 osteotomies in 58 patients were evaluated. Of the 144 junctions, 28 (19.4%) showed radiographic nonunion. Patients who underwent preoperative (odds ratio [OR] = 0.30, P = .027) and postoperative (OR = 0.28, P = .003) radiation had a significantly lower bone union score. Time from surgery to postoperative imaging was associated with higher bone union scores (OR = 1.07, P = .024). When bone union scores were compared among types of MFTT, fibular (OR = 5.62, P = .008) and scapular (OR = 4.69, P = .043) MFTT had significantly higher scores than OCRF MFTT. Twelve (20.7%) patients had postoperative complications. There was no statistically significant correlation between clinical complications and various variables, including type of osseous MFTT. Conclusion Pre- and postoperative radiation and time from surgery have an impact on bone union. Regarding the type of MFTT, fibular and scapular MFTT appeared to have higher bone union when compared with OCRF. There was no impact of bone union or type of osseous MFTT on clinical complications.

Early Experience of Oncological Reconstructive Surgery at Dharmais National Cancer Center

Background: Oncological reconstructive surgery is a new paradigm in which it combines oncologic principles with reconstruction techniques. This study aims to present patients’ characteristics who had undergone oncological reconstructive surgery at the Department of Surgical Oncology, Dharmais National Cancer Center. Methods: This descriptive study identified patients’ characteristics who underwent oncological reconstructive surgery, their cancer types, and their therapies. All data were obtained from surgery registration and medical records from January 2019 to January 2020. Data were then presented in number and percentage.Results: A total of 174 patients had undergone oncological reconstructive surgery within one year. The mean age of all patients was 48.2 ± 16.7 years old. Most patients were female (72.1%), with breast cancer making up most cases (43.7%). Most of the participants also underwent mastectomy (42.1%), which was later followed by various reconstruction types. Sixty patients received free tissue transfer with microsurgery (34.4%), of which head and neck cancer constituted most cases. In addition, the most common donor site for the free flap was the Anterolateral Thigh (41.7%). Of all 174 patients, 75.2% presented with locally advanced cancer, and 17.8% had metastatic cancer. Within one year of follow-up, the survival rate was 87.4%, while local recurrence was 3%. Conclusions: The oncological reconstructive surgery approach plays a therapeutic and reconstructive role, and such might be the preferred method of choice for patients presenting with advanced-stage cancer

USE OF A COMBINATION OF TWO IPSILATERAL FLAPS TO COVER POST TRAUMATIC LEG DEFECTS

INTRODUCTION-With advancement in the microsurgical techniques the free tissue transfer has become the rst choice to manage large leg defects which cannot be covered with a local ap.The other option is the cross leg ap.Free aps need an expert team, expensive instruments and plenty of time. Cross leg aps lead to a difcult postoperative period for the patient. When the tissues surrounding the defect are healthy and a careful planning is done, a combination of two local aps which are otherwise used singly for smaller defects may obviate the need for a free or cross leg ap in certain cases.In this study we evaluated the patients who had undergone a combination of gastrocnemius muscle and fasciocutaneous aps for covering the large leg defects. AIMS AND OBJECTIVES-The aim is to study the role of a combination of two local aps to provide cover for the large leg defects. MATERIAL AND METHODS-A retrospective analysis of 30 patients operated from June 2016 to July 2021 for the leg defects rd involving the upper 2/3 of the leg was done.In these patients the upper half of the defects was covered with gastrocnemius muscle ap and the lower half was covered with inferiorly based fasciocutaneous ap. All patients had been followed till the wound cover became stable. RESULTS-All patients were males between the age group of 16 to 46 years. Leg defects were exposed tibia or implant and were post-traumatic in all the cases. Size of the defects ranged from 16cm to 18cm. In all the patients both aps survived well. Two patients had marginal necrosis of fasciocutaneous ap and one had discharge from underneath the muscle ap but were managed conservatively. CONCLUSION- A combination of gastrocnemius muscle and fasciocutaneous aps is a safeoption for covering large leg rd defects involving the upper 2/3 where surrounding skin and muscles are healthy

Free gracilis end-to-side microanastomosis to a peronea arteria magna: a case report

Background Complex orthoplastic lower limb trauma in individuals with multiple injuries requires considerable resources and interdisciplinary collaboration for good outcomes. We present the first reported end-to-side free flap microanastomosis for lower limb trauma reconstruction involving a peronea arteria magna without radiographic collaterals. Case presentation A 55-year-old Caucasian gentleman involved in road traffic collision sustained an open tibial fracture on the anteromedial distal third of the left lower leg with local degloving and a subtotal right foot and ankle degloving. Both injuries were reconstructed with free tissue transfer. A left lower limb peronea arteria magna successfully received a free gracilis muscle flap by end-to-side microanastomosis and perfusion of the foot was preserved. This rare anatomical variant and its anatomy is reviewed, as well as a description of the suggested preoperative planning and technique for reconstruction. Conclusions Successful free flap reconstruction may be performed to a lower limb with a peronea arteria magna recipient as the lone vessel supplying the foot in trauma, although preoperative counseling of the risks, benefits, and options are essential. Level of evidence Level V, case report

Estimation of Hemi-Abdominal-Based Free Flap Weight Using Two Computed Tomography-Derived Measurements

Background Accurate flap weight estimation is crucial for preoperative planning in microsurgical breast reconstruction; however, current flap weight estimation methods are time consuming. It was our objective to develop a parsimonious and accurate formula for the estimation of abdominal-based free flap weight. Methods Patients who underwent hemi-abdominal-based free tissue transfer for breast reconstruction at a single institution were retrospectively reviewed. Subcutaneous tissue thicknesses were measured on axial computed tomography angiograms at several predetermined points. Multivariable linear regression was used to generate the parsimonious flap weight estimation model. Split-sample validation was used to for internal validation. Results A total of 132 patients (196 flaps) were analyzed, with a mean body mass index of 31.2 ± 4.0 kg/m2 (range: 22.6–40.7). The mean intraoperative flap weight was 990 ± 344 g (range: 368–2,808). The full predictive model (R 2 = 0.68) estimated flap weight using the Eq. 91.3x + 36.4y + 6.2z – 1030.0, where x is subcutaneous tissue thickness (cm) 5 cm lateral to midline at the level of the anterior superior iliac spine (ASIS), y is distance (cm) between the skin overlying each ASIS, and z is patient weight (kg). Two-thirds split-sample validation was performed using 131 flaps to build a model and the remaining 65 flaps for validation. Upon validation, we observed a median percent error of 10.2% (interquartile range [IQR]: 4.5–18.5) and a median absolute error of 108.6 g (IQR: 45.9–170.7). Conclusion We developed and internally validated a simple and accurate formula for the preoperative estimation of hemi-abdominal-based free flap weight for breast reconstruction.