Correlation between BMI and PFNA size selection in elderly patients with femoral intertrochanteric fractures
Objective To explore the correlation between body mass index (BMI) and proximal femoral nail anti-rotation (PFNA) size in the treatment of elderly patients with intertrochanteric fractures.Methods A total of 207 elderly patients with intertrochanteric fractures who underwent surgical treatment in the Department of Ortho-paedics,Jining Medical University from Dec.2016 to Jul.2020 were retrospectively analyzed.According to the height and weight information collected by the Haitai V3.0 electronic medical record system,the BMI was calculat-ed.Based on the Chinese BMI standard,patients were divided into group A ( underweight and normal with a BMI<24 kg/m2 ) and group B ( overweight and obesity with a BMI ≥24 kg/m2 ) .There were 135 cases in group A,in-cluding 57 males and 78 females aged 80.0 years on average,and 72 cases in group B,including 15 males and 57 fe-males aged 79.7 on average.The operation time,length of hospital stay,intraoperative bleeding and PFNA nail size were analyzed.Results The 207 cases of femoral intertrochanteric fractures were followed up for 1 year by outpa-tient service or telephone.All of them survived and no complication of loosening or nonunion was observed.Com-pared with group B,group A showed significantly shorter operation time (min,66.5±31.4 vs.75.7±22.0,P=0.036) and larger diameter of the main nail (mm,11.0±0.83 vs.10.7±0.9,P=0.028).Other variables revealed no significant difference between groups A and B:intraoperative bleeding (mL,128.4±113.5 vs.120.1±84.8),hospitalization time (d,13.8±5.2 vs.15.7±9.6),and length of the spiral blade (mm,92.0±7.3 vs.89.0±32.0) and the main nail (mm,184.7±25.3 vs.189.7±38.4,all P>0.05).Conclusion There is a certain corre-lation between BMI and PFNA size in elderly patients with intertrochanteric fractures.The diameter of the main nail used in normal and underweight patients is significantly larger than that in overweight and obese patients,and the op-eration time is significantly shorter.
Femoral intertrochanteric fracturesBody mass indexProximal femoral nail anti-rotation