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.

Teaching Microsurgical Breast Reconstruction—A Retrospective Cohort Study

Microsurgical breast reconstruction demands the highest level of expertise in both reconstructive and aesthetic plastic surgery. Implementation of such a complex surgical procedure is generally associated with a learning curve defined by higher complication rates at the beginning. The aim of this study was to present an approach for teaching deep inferior epigastric artery perforator (DIEP) and transverse upper gracilis (TUG) flap breast reconstruction, which can diminish complications and provide satisfying outcomes from the beginning. DIEP and TUG flap procedures for breast reconstruction were either performed by a senior surgeon (>200 DIEP/TUG, ”no-training group”), or taught to one of five trainees (>80 breast surgeries; >50 free flaps) in a step-wise approach. The latter were either performed by the senior surgeon, and a trainee was assisting the surgery (“passive training”); by the trainee, and a senior surgeon was supervising (“active training”); or by the trainee without a senior surgeon (“after training”). Surgeries of each group were analyzed regarding OR-time, complications, and refinement procedures. A total of 95 DIEP and 93 TUG flaps were included into this study. Before the first DIEP/TUG flap without supervision, each trainee underwent a mean of 6.8 DIEP and 7.3 TUG training surgeries (p > 0.05). Outcome measures did not reveal any statistically significant differences (passive training/active training/after training/no-training: OR-time (min): DIEP: 331/351/338/304 (p > 0.05); TUG: 229/214/239/217 (p > 0.05); complications (n): DIEP: 6/13/16/11 (p > 0.05); TUG: 6/19/23/11 (p > 0.05); refinement procedures (n): DIEP:71/63/49/44 (p > 0.05); TUG: 65/41/36/56 (p > 0.05)), indicating safe and secure implementation of this step-wise training approach for microsurgical breast reconstruction in both aesthetic and reconstructive measures. Of note, despite being a perforator flap, DIEP flap required no more training than TUG flap, highlighting the importance of flap inset at the recipient site.

Economic Impact of Refinements in ERAS Pathways in DIEP Flap Breast Reconstruction

Introduction Enhanced recovery after surgery (ERAS) protocols at our institution have led to an expected decrease in hospital length of stay and opioid consumption for patients treated with deep inferior epigastric perforator (DIEP) flaps for breast reconstruction. We look to examine the economic patterns across these years to see the impact of costs for the patient and institution. Methods This study retrospectively evaluated consecutive patients treated with bilateral DIEP flaps for breast reconstruction between October 2015 and August 2020. We categorized the cases into three categories: pre-ERAS, ERAS, ERAS + bupivacaine. Primary outcomes observed included the contribution margin per operating suite case minute and total cost to the patient. An analysis of variance determined whether there was a difference between the three groups and a Tukey post-hoc analysis made pairwise comparisons. A p-value < 0.05 was significant. Results A total of 268 cases of bilateral DIEPs performed by the two senior authors were analyzed in this study. Seventy-four cases were pre-ERAS, 72 were ERAS, and 122 were ERAS + bupivacaine. There was a statistical difference between the contribution margin per operating minute. A Tukey post hoc test revealed that the average contribution margin per operating suite case minute was significantly higher for the ERAS and ERAS + bupivacaine compared with the pre-ERAS groups.There was a statistically significant difference between the total cost to the patients. A Tukey post hoc test revealed that the average total cost to the patient was statistically significantly lower for the ERAS and ERAS + bupivacaine compared with the pre-ERAS group. Conclusion Implementation of ERAS and continued improvements in ERAS resulted in significantly decreased costs for the patient and increased profitability for the hospital. Investing in improvements to ERAS protocols can improve profitability for the institution while simultaneously improving costs and access to care for patients in need of breast reconstruction.

Patient-Reported Outcomes in Free-Flap Breast Reconstructive Surgery over Time (PRO-BREST)

<b><i>Introduction:</i></b> Patient-reported outcomes (PROMs) are increasingly relevant to assess surgical quality and guide decisions in breast reconstruction (BR). Satisfaction with outcomes may change as time progresses. We assessed satisfaction in patients who underwent free-flap BR in the last 12 years. <b><i>Methods:</i></b> All patients who underwent free-flap BR from 2006 to 2018 were invited to complete the validated BREAST-Q for reconstruction. The BREAST-Q comprises 6 domains covering various aspects of satisfaction. Unadjusted linear regression assessed the relationship between different domains of the BREAST-Q and time since BR. Two-sample <i>t</i> tests assessed differences in satisfaction between patients who underwent BR ≥5 years versus &#x3c;5 years prior. <b><i>Results:</i></b> Forty-three women with primary or secondary free-flap BR between 2006 and 2018 were included in the study. Most patients (<i>n</i> = 33, 76.7%) underwent DIEP flap BR. Overall satisfaction with breasts and with outcomes improved as time since BR increased (<i>p</i> = 0.031 and <i>p</i> = 0.017, respectively). Overall satisfaction with outcomes scored higher in patients with BR ≥5 years prior (≥5 years vs. &#x3c;5 years: breast score 88.6 (SD 12.5) versus 66.9 (SD 21.8); <i>p</i> = 0.005). Satisfaction with breasts and psychosocial well-being also scored higher in these patients. There was no difference in results between primary and secondary BR. Patients who underwent additional surgery (refinements) reported higher satisfaction with outcomes and abdominal well-being. <b><i>Conclusions:</i></b> PROMs concerning satisfaction with breast and with outcomes following BR improve as time since treatment progresses. This study demonstrates that time since diagnosis may be an important factor in satisfaction. It underlines the importance of long-term PROMs related to BR, to help provide patients and health care professionals in decision-making and in managing expectations related to BR.

Observations from Implementation of the ERAS Protocol after DIEP Flap Breast Reconstruction

Background The Enhanced Recovery After Surgery (ERAS) protocol is a multivariate intervention requiring the help of several departments, including anesthesia, nursing, and surgery. This study seeks to observe ERAS compliance rates and obstacles for its implementation at a single academic institution. Methods This is a retrospective study looking at patients who underwent deep inferior epigastric perforator (DIEP) flap breast reconstruction from January 2016 to September 2019. The ERAS protocol was implemented on select patients early 2017, with patients from 2016 acting as a control. Thirteen points from the protocol were identified and gathered from the patient's electronic medical record (EMR) to evaluate compliance. Results Two hundred and six patients were eligible for the study, with 67 on the control group. An average of 6.97 components were met in the pre-ERAS group. This number rose to 8.33 by the end of 2017. Compliance peaked with 10.53 components met at the beginning of 2019. The interventions most responsible for this increase were administration of preoperative medications, goal-oriented intraoperative fluid management, and administration of scheduled gabapentin postoperatively. The least met criterion was intraoperative ketamine goal of >0.2 mg/kg/h, with a maximum compliance rate of 8.69% of the time. Conclusion The introduction of new protocols can take over a year for full implementation. This is especially true for protocols as complex as an ERAS pathway. Even after years of consistent use, compliance gaps remain. Staff-, patient-, or resource-related issues are responsible for these discrepancies. It is important to identify these issues to address them and optimize patient outcomes.

Dynamic Infrared Thermography (DIRT) in Biomedical Applications: DIEP Flap Breast Reconstruction and Skin Cancer

Infrared thermography technology has improved drastically in recent years and is regaining interest in medicine for applications such as deep inferior epigastric perforate flap breast reconstruction, breast cancer diagnosis, skin tissue identification, psoriasis detection, etc. However, there is still a need for an optimised measurement setup and protocol in order to capture the most suitable images for decision making and further processing. Nowadays, different cooling methods are being used; nevertheless, a general optimised cooling protocol is not yet defined. In this manuscript, several cooling techniques, as well as the measurement setups, are reviewed and optimised. It is possible to enhance the thermal images by selecting an appropriate cooling method and duration, and additionally, an optimised measurement setup enables a comparison between different inspections.

Comparison of skin sensitivity following breast reconstruction with three different techniques: Autologous fat grafting, DIEP flap and expander/implant1

BACKGROUND: Autologous fat grafting (AFG) has been established over the past two decades as an additive technique during and after breast reconstruction. Complete reconstruction of the breast mound with AFG alone represents an exceptional technique that has been published mostly in case reports or in studies with limited cases. The purpose of this study is to investigate the influence of three different techniques for breast reconstruction on the recovery of skin sensitivity at the reconstructed breast. METHODS: The study included 30 patients after mastectomy following breast cancer. Three groups were examined: A) breast reconstruction by autologous fat grafting (AFG), B) breast reconstruction by deep inferior epigastric artery perforator flap (DIEP) and C) breast reconstruction by expander/implant (TE). Biometric data were compared; sensitivity tests were performed using Semmes-Weinstein monofilaments. The non-operated, healthy contralateral breasts of the patients were used as a reference. RESULTS: While the traditional reconstruction techniques by microsurgical anastomosed perforator flap or expander/implant showed a strongly decreased or completely missing sensitivity of the skin, the tests after reconstruction by AFG represented high values of sensory recovery, which came close to the reference group of non-operated breasts. CONCLUSION: To our knowledge, this is the first study to compare skin sensitivity after AFG-based reconstruction to established techniques for breast reconstruction. We could demonstrate in a limited group of patients, that breast reconstruction by autologous fat grafting can achieve higher values of skin sensitivity compared to traditional techniques.