关键词: 骶髂关节, 未经引导穿刺, 矢状滑膜部

Abstract:

Objective　To provide anatomic basis for the feasibility and safety of unguided sacroiliac joint puncture.    Methods    3 sacroiliac joint section specimens, 4 dried pelvic specimens (2 male, 2 female) , 4 antiseptic cadaveric pelvic specimens (3 male.1 female) and 62 ankylosing spondylitis patients' sacroiliac joint CT imaging data were collected and measured. The injection target was designated at the sagittal synovium part below the posterior superior iliac spine.   Results   The average length of sagittal synovium part was about（18.40±3.40）mm in male and （17.32±3.60）mm in female(P>0.05); The average distance between the posterior midline and sagittal synovium part was （41.00±3.30）mm in male and （42.74±4.00）mm in female(P<0.05), with the significant difference; The average distance between the midpoint and posterior superior iliac spine was（27.66±3.10)mm in male and （28.76±3.50）mm in female respectively(P>0.05).   Conclusions According to the sex and thickness of fat, conducting injection in the area of （41.00±3.50）mm away from the posterior midline, （28.00±3.20）mm from the posterior superior iliac spine makes  puncture entering the sacroiliac joint more accurately, easily, and successfully. 

Key words:  Sacroiliac joint, Unguided puncture, Sagittal synovium part