Is the combination of interfascial plane blocks sufficient for awake breast cancer surgery? An observational, prospective, proof-of-concept study.

Introduction: Breast cancer is the most prevalent cancer among women, often necessitating surgical intervention. While surgeries like lumpectomy can be performed under local anesthesia, more extensive procedures typically require general anesthesia. Awake breast cancer surgery has emerged as an alternative due to risks associated with general anesthesia and patient preference.

Methods: This prospective observational study, conducted from July 2022 to July 2023, evaluated the effectiveness of ultrasound-guided fascial plane blocks for awake breast surgery. Patients aged 18-80 years undergoing unilateral breast surgery were included, following ethical committee approval and written informed consent. Exclusion criteria were prior breast surgery, coagulopathies, infections, allergies to local anesthetics, psychiatric disorders, body mass index over 40 kg/m², and chest deformities. The combination of interpectoral, pecto-serratus, and deep serratus plane blocks was used as the primary anesthetic method, with a superficial parasternal block added in cases where complete cutaneous coverage was not achieved.

Results: Seventeen patients were enrolled. The primary outcome, sufficient surgical anesthesia without deep sedation, was achieved in 15 patients. The combination of the aforementioned blocks proved effective, with an average surgery duration of 59.66 min, and propofol requirements averaging 1.77 mg/kg/hour. Most patients reported high satisfaction levels, and no early or late block-related complications were observed.

Conclusion: The combination of fascial plane blocks is a viable option for awake breast cancer surgery, potentially eliminating the need for more invasive anesthesia techniques. Further studies are necessary to confirm these findings in larger, homogeneous patient groups.