The effect of subcutaneous local spraying of Pseudomonas aeruginosa preparation to reduce postoperative drainage time in patients with breast cancer.

Background To evaluate the efficacy of subcutaneous local spraying of Pseudomonas aeruginosa (P. aeruginosa) preparation (PAP) to reduce the postoperative drainage time in patients with breast cancer (BC). Methods The PAP was prepared from an inactivated P. aeruginosa-mannose sensitive hemagglutinin (PA-MSHA) strain, a genetically engineered heat-inactivated PA strain with, mannose-sensitive binding activity, which can induce tumor cell apoptosis. This study is its retrospective nature, a total of 65 BC patients (PAP group) who underwent subcutaneous local spraying of PAP in the operation area at West China Hospital of Sichuan University between June 2019 and October 2019, and 32 BC patients without treatment (non-PAP group, without intraoperative subcutaneous local spraying of PAP in the operation area) were enrolled. Daily drainage volume, drainage time, presence of seroma after extubation, and treatment complications (such as fever, incision infection, and flap necrosis) were recorded. Results No significant differences in age, height, weight, age of initial menstruation, menopause, body mass index (BMI), tumor size, lymph node metastasis, or treatment complications were found between the two groups (P>0.05). Drainage volume and drainage time in the PAP group were significantly lower than those in the non-PAP group (P<0.001). Additionally, the incidence of seroma after extubation was significantly lower in the PAP group compared to the non-PAP group (P=0.009). Conclusions Subcutaneous local spraying of PAP on the operation area may be helpful to reduce drainage volume, shorten drainage time, and prevent the occurrence of seroma after BC surgery.