Analysis of pathogens distribution and risk factors of incision infection in elderly patients after spinal surgery

Objective: To explore the pathogens distribution and risk factors of incision infection in elderly patients after spinal surgery.Methods: The clinical data of 569 elderly patients treated with spinal surgery were retrospectively analyzed.The distribution of pathogens in infection incision was analyzed.The risk factors of incision infection in elderly patients after spinal surgery were analyzed using the univariate and multivariate logistic regression analysis.Results: Among 569 elderly patients treated with spinal surgery,24 patients were infected,and the infection rate was 4.22%.Thirty-one pathogens were found,which included 21 strains(67.74%) of gram-negative bacteria,9 strains(29.03%) of gram-positive bacteria,and 1 strain(3.23%) of fungi.The univariate analysis showed that the malnutrition,BMI ≥ 28 kg/m²,operative time ≥ 150 min,invasive procedures,internal fixation devices and diabetes were the risk factors of spinal surgical incision infection(P<0.05 to P<0.01).The multivariate logistic regression analysis showed that the BMI ≥ 28 kg/m²,operation time ≥ 150 min and diabetes were the independent risk factors of spinal surgical incision infection in elderly patients(P<0.05 to P<0.01).Conclusions: The pathogen of incision infection of spinal surgery is wide in elderly patients,and the risk factors associated with postoperative infection is various.The targeted measures and rational antimicrobial agents should be used to reduce the infection rate.