Sacroiliac joint:a study of sectional anatomy and puncture pathway / 中华风湿病学杂志

ABSTRACT

Objective To investigate the best pathway and safety of sacroiliac joint (SIJ) puncture.Methods The anticorrosive adult specimens were frozen after SIJ CT scan.Horizontal or coronary sectioning was done.The horizontal sectioning was done corresponding to CT scan.The structures of different sections were observed and compared with the corresponding CT scans.Results According to the horizontal sectioning,the SIJ included synovial portion and ligamentous portion.As shown by CT,only part of the space between sacrum and ilium was the synovial portion,which occupied the whole part of the lower 1/3 segment SIJ,and the posterior was not covered with bones.There are no important nerves and blood vessels passing through the route from the buttock to the posterior of SIJ.Thus,the pathway can be regarded as the best and safe one although the lumbosacral trunk and iliac blood vessels go through the anterior of SIJ in the pelvis.Conclusion The best pathway of SIJ puncture is the upper part of the lower 1/3 segment.The safety of puncture depends on not penetrating the pelvic cavity to avoid damaging the structures in pelvis.