[Logistic regression analysis for factors affecting 
the successful rate of nano-carbon in sentinel lymph 
node biopsy].

Objective: To explore the factors affecting the successful rate of nano-carbon in sentinel lymph node biopsy.

Methods: A total of 270 patients with breast cancer, who were treated in First Affilitated Hospital of Henan University of Science and Technology from January 2013 to March 2015, were chosen and given sentinel lymph node biopsy (SLN) with nano-carbon, and the influencial factors were examined by logistic analysis.

Results: Successful rate of biopsy, accuracy, sensitivity and false negative rate was 92.2%, 97.6%, 93.1% and 6.8%, respectively. Age, primary tumor lesions, body mass index, axillary lymph node status, number of SLN and pathological grade were the factors affetcing successful biopsy (all P<0.05), and body mass index, age, and number of SLN were three independent factors affecting the successful rate of biopsy (all P<0.05). The history of biopsy, tumor location, affected sides, injection sites and chemotherapy showed little effect on the successful rate of biopsy (all P> 0.05).

Conclusion: Nano-carbon tracer method is a reliable method in sentinel lymph node biopsy. The body mass index, age, and number of lymph node metastasis greatly impact the successful rate of biopsy.