The Use of Hydrodissection in Nipple- and Skin-sparing Mastectomy: A Retrospective Cohort Study.

Unlabelled: Hydrodissection (HD) is a method to create a subcutaneous and prepectoral plane during mastectomy using a mixture of crystalloid solution with local anesthetic and epinephrine. The aim of this study was to evaluate postoperative complications and surgical outcomes of this technique compared with standard mastectomy.

Methods: This is a retrospective cohort study of patients who underwent bilateral risk-reducing, nipple-sparing mastectomy and immediate implant-based reconstruction through an inframammary crease incision either with standard electrocautery (control group) or HD (HD group) between January 2013 and January 2017. Patient demographics, procedural details, surgical outcomes, and complications were compared using nonparametric statistical tests and logistic regression analysis.

Results: Forty-one patients (82 nipple-sparing mastectomies) were analyzed (23 patients in the HD group and 18 in the control group). Patients' demographics were similar for both groups. Surgical time was shorter with HD compared with standard mastectomy (median 168 versus 207.5 minutes, = 0.016) with shorter median hospital stay (2 versus 2.5 days, = 0.033). Complication rates were similar in both groups, and fewer patients in the HD group required Coleman fat transfer to improve cosmesis (12 versus 3, = 0.003).

Conclusions: HD mastectomy is a safe alternative to standard technique in selected patients. Further surgical research to explore the role of HD in a wider clinical setting is warranted.