Stabilization of Sacroiliac Luxation in 40 Cats Using Screws Inserted in Lag Fashion

Abstract

Screw placement to a depth of 60% of the width of the feline sacrum is recommended.

Closed reduction and percutaneous fixation of sacroiliac luxations in cats using 2.4 mm cannulated screws – a cadaveric study

“…Eleven out of 12 screws were placed in a satisfactory location within the sacral body. Our results are comparable to the reported 87.5% accuracy achieved with open stabilization techniques (9). We classified the one screw exiting the sacral body on the ventral side as malpositioned.…”

“…We classified the one screw exiting the sacral body on the ventral side as malpositioned. Stability may be significantly decreased as the threads of the screw are not fully engaged within the sacral body, however other authors considered ventral screw exit as being acceptable (9).…”

“…Surgery is indicated if the cat is showing signs of pain, is nonambulatory, displays severe neurologic deficits or severe narrowing of the pelvic canal, and if concurrent orthopaedic injuries exist (4,5). Various surgical techniques have been described using trans-articular screws and pins alone or in combination (4,(6)(7)(8)(9). When additional stability is required, the technique can be supplemented with a transilial implant (2,10,11).…”

“…Open reduction techniques are invasive and correct screw placement can be challenging. Reported success rates for satisfactory screw placement using closed techniques range from 33% to 87.5% (9,16). Accurate placement of the screw and adequate screw purchase within the sacral body with at least 60% penetration of the sacral body is important to prevent screw loosening (9,17,18).…”

“…Reported success rates for satisfactory screw placement using closed techniques range from 33% to 87.5% (9,16). Accurate placement of the screw and adequate screw purchase within the sacral body with at least 60% penetration of the sacral body is important to prevent screw loosening (9,17,18). Anatomic landmarks and safe corridors for accurate screw placement have been described for dogs and cats (18)(19)(20)(21)(22)(23).…”