Perioperative Hyperspectral Imaging to Assess Mastectomy Skin Flap and DIEP Flap Perfusion in Immediate Autologous Breast Reconstruction: A Pilot Study

Mastectomy skin flap necrosis (MSFN) and partial DIEP (deep inferior epigastric artery perforator) flap loss represent two frequently reported complications in immediate autologous breast reconstruction. These complications could be prevented when areas of insufficient tissue perfusion are detected intraoperatively. Hyperspectral imaging (HSI) is a relatively novel, non-invasive imaging technique, which could be used to objectively assess tissue perfusion through analysis of tissue oxygenation patterns (StO2%), near-infrared (NIR%), tissue hemoglobin (THI%), and tissue water (TWI%) perfusion indices. This prospective clinical pilot study aimed to evaluate the efficacy of HSI for tissue perfusion assessment and to identify a cut-off value for flap necrosis. Ten patients with a mean age of 55.4 years underwent immediate unilateral autologous breast reconstruction. Prior, during and up to 72 h after surgery, a total of 19 hyperspectral images per patient were acquired. MSFN was observed in 3 out of 10 patients. No DIEP flap necrosis was observed. In all MSFN cases, an increased THI% and decreased StO2%, NIR%, and TWI% were observed when compared to the vital group. StO2% was found to be the most sensitive parameter to detect MSFN with a statistically significant lower mean StO2% (51% in the vital group versus 32% in the necrosis group, p < 0.0001) and a cut-off value of 36.29% for flap necrosis. HSI has the potential to accurately assess mastectomy skin flap perfusion and discriminate between vital and necrotic skin flap during the early postoperative period prior to clinical observation. Although the results should be confirmed in future studies, including DIEP flap necrosis specifically, these findings suggest that HSI can aid clinicians in postoperative mastectomy skin flap and DIEP flap monitoring.

Medicine Matters: Special Considerations For Sglt2 Inhibitors And Prolonged Nothing Per Os Status Following Free Flap Surgery (Preprint)

UNSTRUCTURED A 59-year-old female patient undergoing deep inferior epigastric perforator flap surgery for autologous breast reconstruction became acutely ill with tachypnea, nausea, and vomiting on post-operative day three. A work-up elucidated a diagnosis of diabetic ketoacidosis (DKA) with lower-than-expected glucose levels as a result of recent semaglutide use. She required intensive care unit resuscitation with an insulin drip and glucose administration. Sodium-glucose cotransporter-2 inhibitors (SGLT2i) are a class of oral anti-hyperglycemic agents used for the treatment of type II diabetes (DMII). As the use of these medications become more prevalent, surgeons must be educated of this serious complication and plan for patient management in advance of minor and major surgeries.

EP.TH.286Optimisation of Secondary Breast Reconstruction

Aims The purpose of secondary breast reconstruction is to restore patient’s integrity. Autologous breast reconstruction has become the superior method of breast reconstruction, especially in cases with inadequate skin envelope and post-radiotherapy tissue damage. A 3D-template-enhanced secondary autologous breast reconstruction with restoration of innervation was developed at our department. Methods Thirty patients are planned to be included in the prospective double-blinded study. The reconstruction is performed with the deep inferior epigastric perforator (DIEP) free flap using 3D template from the contralateral healthy breast. Additionally, coaptation of the anterior branch of the 3rd intercostal nerve with the dominant lateral intercostal nerve innervating the DIEP flap is performed. Breast-Q questionnaires are collected before and after the reconstruction and the breast sensation is assessed on regular intervals. Results The preliminary results show an improvement in the sensation of the reconstructed breast and higher patient satisfaction score. Prior to abstract submission, no significant complications have been noted, in one patent abnormal sensation of the breast was reported. Conclusions According to previous studies, patients with innervated free flap reconstruction express higher level of satisfaction as the sensation of the reconstructed breast contributes significantly to the level of satisfaction. Furthermore, use of 3D model from the contralateral breast produces results that are superior to traditional methods. Preliminary results showed that the combination of both methods improved patient satisfaction regarding the aesthetic outcome and functional result. With the appropriate patient selection this type of optimised breast reconstruction should be performed.