Hyperbaric Oxygen Therapy and Mastectomy Flap Ischemia following Nipple-Sparing Mastectomy and Immediate Breast Reconstruction

Risk Factors for Skin Flap and Nipple-Areolar Necrosis in Patients Undergoing Nipple-Sparing Mastectomy With Deep Inferior Epigastric Perforator Flap Reconstruction

INTRODUCTION

Nipple-sparing mastectomy (NSM) with deep inferior epigastric perforator (DIEP) flap reconstruction is a surgical option for select patients with or at risk of breast cancer. However, post-operative skin flap and nipple-areolar complex (NAC) necrosis remain common complications. This study aimed to identify factors associated with necrosis in patients undergoing NSM with DIEP reconstruction.

METHODS

A retrospective cohort study was performed from 2015 to 2023. 74 variables were analyzed in patients undergoing NSM with DIEP. Patients were stratified into 3 groups based on post-operative skin/NAC necrosis: none, partial thickness, and full thickness. Comparative and descriptive statistics were performed via t-tests, ANOVA, and chi-squared tests.

RESULTS

34 women with 31 breast cancers met inclusion. 44% experienced necrosis: 15% partial thickness and 29% full thickness. The majority were white (85.3%) with mean age of 50 years (SD = 9.11). In patients with immediate DIEP reconstruction, hypoperfused areas identified by SPY angiography increased risk of necrosis (P = .012). Approximately 50% of both partial thickness and full thickness necrosis patients had concerns on SPY angiography. Former smokers in the full thickness necrosis group had more pack years than those without necrosis (9 vs .65 pack years, P = .035).

CONCLUSION

In patients receiving NSM with DIEP flap reconstruction, those with hypoperfusion on SPY angiography and longer smoking history had higher necrosis rates. This supports the continued used of SPY angiography and the role of pre-operative counseling in former smokers with increased pack years on their risk of necrosis and the role of preventative measures in the perioperative setting.

Superomedial Pedicle Technique and Management of Circulation Problems in Gigantomastia : Treatment of Gigantomastia

Breast reduction surgeries encompass a wide range of methods that are continuously evolving to discover more reliable and satisfactory techniques. This presentation aims to address the research gap by sharing outcomes and experiences using the superomedial pedicle in gigantomastia, as well as the implemented protocol for managing nipple-areola complex (NAC) ischemia. The Wise pattern and superomedial pedicle reduction mammaplasty method were utilized in treating 19 patients (38 breasts). The average age of the patients was 41.47 years, with a basal mass index (BMI) of 33.27 kg/m2. The mean sternal notch to nipple (SN-N) length for the entire population was found to be 40.97 cm. On both sides, this length was statistically similar at 41.11 cm on the right side and 40.84 cm on the left side. The average weight of resected tissue from all patients was calculated to be 1793.42 g, with slightly higher weight on the right side at 1800 g compared to the left side's weight of 1786.84 g. Postoperative NAC ischemia occurred in three patients, one bilateral case, and two unilateral cases. The study revealed that in both the groups with and without NAC ischemia, the average values were as follows: age, which ranged from 45.33 to 40.75 years; BMI, ranging from 35.01 kg/m2 to 32.95 kg/m2; SN-N distance, which varied from 40 cm to 41.09 cm; and excision material weights, ranging from 1650 g to 1810.29 g. The p-value in the comparisons was found to be greater than 0.05. These results indicate that age, BMI, SN-N distance, and excision material weight did not have an impact on NAC vascularity issues. All NACs were successfully saved through a protocol involving hyperbaric oxygen therapy (HOT) and vacuum-assisted therapy (VAT). The study suggests that utilizing a superomedial flap is a viable option for treating gigantomastia and highlights the effectiveness of their outlined protocol in managing postoperative complications. While acknowledging the need for comparative studies, the study proposes incorporating HOT and VAT into protocols aimed at saving NACs.Level of Evidence IV This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Hyperbaric Oxygen Therapy for Complications in Nipple-Sparing Mastectomy with Breast Reconstruction: A Systematic Review

Background: Research advancing effective treatments for breast cancer is crucial for eradicating the disease, reducing recurrence, and improving survival rates. Nipple-sparing mastectomy (NSM), a common method for treating breast cancer, often leads to complications requiring re-operation. Despite advancements, the use of hyperbaric oxygen therapy (HBOT) for treating these complications remains underexplored. Therefore, we analyze the efficacy of HBOT in the post-operative care of patients undergoing NSM. Methods: A systematic search was conducted using PubMed, Scopus, and the Cochrane Library. Studies were assessed for eligibility using the PICO (Population, Intervention, Comparison, Outcome) framework and classified based on American Society of Plastic Surgeons (ASPS) levels of evidence. Seven studies, totaling a pool of 63 female patients, met the inclusion criteria. Among these studies, four were categorized as Level III (57.1%), one as Level IV (14.3%), and two as Level V (28.6%). These studies focused on HBOT's role in wound healing, the successful salvage of breast reconstruction, and the optimal timing for HBOT. Results: This review revealed that HBOT indeed has potential for improving tissue oxygenation, vascularization, and, consequently, wound healing. It is noted that HBOT is efficacious for mitigating post-NMS complications, including infections, re-operation, flap loss, seroma, and hematoma. Conclusions: Overall, HBOT could be beneficial in standard post-surgical care protocols for patients undergoing NSM due to its role in mitigating common adverse effects that occur after mastectomy. Despite promising outcomes, the recent literature lacks rigorous clinical trials and well-defined control groups, underscoring the need for further research to establish standardized HBOT protocols.

Hyperbaric Oxygen Therapy for Threatened Nipple-Sparing Mastectomy Flaps: An Adjunct for Flap Salvage

BACKGROUND

Nipple-sparing mastectomy (NSM) is emerging as the standard of care for treatment of breast cancer because of its oncologic safety and superior aesthetic outcomes. However, ischemia or necrosis of the skin flap and/or nipple-areola complex remain frequent complications. Hyperbaric oxygen therapy (HBOT) has emerged as a potential adjunct for flap salvage, although it is not currently a widely accepted practice. Here we review our institution's experience using a protocol of HBOT in patients with signs of flap ischemia or necrosis after NSM.

METHODS

Retrospective review identified all patients treated with HBOT at our institution's hyperbaric and wound care center because of signs of ischemia after NSM. Treatment parameters consisted of 90-minute dives at 2.0 atmosphere once or twice daily. Patients unable to tolerate dives were considered a treatment failure, whereas those lost to follow-up were excluded from analysis. Patient demographics, surgical characteristics, and treatment indications were recorded. Primary outcomes assessed were flap salvage (no operative revision), need for revision procedures, and treatment complications.

RESULTS

A total of 17 patients and 25 breasts met the inclusion criteria. The mean ± SD time to initiation of HBOT was 9.47 ± 12.7 days. The mean ± SD age was 46.7 ± 10.4 years, and mean ± SD follow-up time was 36.5 ± 25.6 days. Indications for NSM included invasive cancer (41.2%), carcinoma in situ (29.4%), and breast cancer prophylaxis (29.4%). Initial reconstruction included tissue-expander placement (47.1%), autologous reconstruction with deep inferior epigastric flaps (29.4%), and direct-to-implant reconstruction (23.5%). Hyperbaric oxygen therapy indications included ischemia or venous congestion for 15 breasts (60.0%) and partial thickness necrosis for 10 breasts (40.0%). Flap salvage was achieved in 22 of 25 breasts (88.0%). Reoperation was required for 3 breasts (12.0%). Hyperbaric oxygen therapy-related complications were observed in 4 patients (23.5%), which included 3 patients with mild ear pain and 1 patient with severe sinus pressure leading to treatment abortion.

CONCLUSIONS

Nipple-sparing mastectomy is an invaluable tool for breast and plastic surgeons to achieve oncologic and cosmetic goals. However, ischemia or necrosis of the nipple-areola complex or mastectomy skin flap remains frequent complications. Hyperbaric oxygen therapy has emerged as a possible intervention for threatened flaps. Our results demonstrate the utility of HBOT in this population to achieve excellent NSM flap salvage rates.