title: [Evaluation of osteonecrosis of the femoral head treated with percutaneous retaining catheterization].
abstract: OBJECTIVE
  To evaluate the efficacies of treating osteonecrosis of the femoral head (ONFH) with percutaneous retaining catheterization.
  
  
  METHODS
  A total of 85 patients (106 hips) of ONFH underwent percutaneous retaining catheterization with self-made instrument. There were stage I (n = 32, 40 hips), stage II (n = 41, 50 hips), stage III (n = 7, 9 hips) and stage IV (n = 5, 7 hips) by Ficat and Arlet classification. The selection criteria include bone marrow edema (BME) of the femoral head and neck and joint fluid on magnetic resonance imaging (MRI).The percent method(%) of Orthopedics Branch of Association of Chinese Medical Association was used for evaluating the efficacies of ONFH with retained femoral head. A follow-up period of 2-10 years was conducted with plain radiograph.The standard was as follows: >90, excellent; 75-89, good; 60-74, passable; <60, bad. The combination of excellent and good denoted obvious effect rate; passable for valid rate; bad for invalid rate.The historical core decompression was used as control group.And χ(2) test was used for statistical analysis (P < 0.05).
  
  
  RESULTS
  The obvious effect rate was 88%(35/40), 74%(37/50), 22%(2/9), 14%(1/7), the valid rate 7%(3/40), 12% (6/50) , 22% (2/9), 14%(1/7) and the invalid rate 5%(2/40), 14% (7/50) , 56% (5/9), 72% (5/7) respectively in Ficat I, II, III and IV stage. No statistically significant differences existed between Ficat I and II stage (P > 0.05) .But there were statistically significant differences in other groups (P < 0.01) .
  
  
  CONCLUSIONS
  Percutaneous retaining catheterization is efficaciously treating ONFH in Ficat I and II stage and it may also be used for ONFH in Ficat III and IV stage.
authors.affiliation: Department of Radiology, 117 Hospital of PLA, Hangzhou 310013, China. Email:genius1174@163.com.
authors.forename: Xing-can
authors.initials: XC
authors.lastname: Chen
authors.forename: Miao
authors.initials: M
authors.lastname: Liu
authors.forename: Dong
authors.initials: D
authors.lastname: He
authors.forename: Cheng-hong
authors.initials: CH
authors.lastname: Yue
authors.forename: Hong-jiang
authors.initials: HJ
authors.lastname: Lu
authors.forename: Jia-wei
authors.initials: JW
authors.lastname: Mao
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhong
mesh_terms: D000328:Adult; D002404:Catheterization; D005260:Female; D005271:Femur Head Necrosis / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome; D055815:Young Adult