Trans-iliac pin/bolt/screw internal fixation for sacroiliac luxation or separation in cats: six cases

Abstract

Trans-iliac pin, bolt or screw stabilisation was performed on six cats with sacroiliac (SI) luxation and separation. For the purpose of this study, SI luxation is defined as the separation of the iliac wing from the sacrum without fracture of the sacral or iliac wing; SI separation is defined as the separation of the iliac wing from the sacrum secondary to fracture of the sacrum and/or the iliac wing. Complications, surgical time and medium-to-long-term outcome were assessed by a retrospective review of the clinical records and owner questionnaires. Postoperative reduction of the SI joint was good-to-excellent in all cases and the outcome was considered good-excellent in all cats apart from one, where the trans-iliac bolt migrated dorsally from the iliac wing. This cat had bilateral SI luxations. Based on our results, trans-iliac fixation of SI luxation/separation is associated with good clinical outcome and should be considered as a treatment option in unilateral SI luxation in cats. Caution should be exercised in the use of trans-iliac pin/bolt as the sole method of stabilisation in bilateral SI luxations.

Single Transsacral Screw and Nut Stabilization of Bilateral Sacroiliac Luxation in 20 Cats

“…The authors recommended that this procedure should be used with caution as the sole fixation for bilateral sacroiliac luxation. 10 Parslow and Simpson 11 described a novel surgical technique for bilateral sacroiliac luxation in eight cats using a single smooth trans-iliosacral pin. Pin (2.0 or 2.7 mm diameter) placement in the sacral body was facilitated by the use of an aiming device, and then the pin was passed through the ilial wings.…”

Management and long-term outcome of pelvic fractures: a retrospective study of 43 cats

“…5,18,27 Placement of a single or bilateral lag screw remains a popular and successful technique, 18 being used in most cats here (21/24). Placement of a transilial pin in conjunction with a lag screw was used in two cats that had bilateral sacroiliac luxations, 5,20 and was also used as sole fixation in one cat. The transilial pin is a potentially easier technique to perform, and may have particular use for when sacral wing landmarks are lost; however, there are currently no guidelines on placement of transilial pins in cats.…”

“…2,3 Various techniques have been used to stabilise pelvic fractures in dogs and cats. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Several complications are typically associated with pelvic fractures. Persistent or subsequent narrowing to the pelvic canal of greater than -45% has been suggested to be a risk factor for obstipation/constipation.…”

Bilateral sacroiliac luxation fixation using a single transiliosacral pin: surgical technique and clinical outcomes in eight cats

“…A transilial pin, transilial bolt or transilial screw placed from the ilial wing dorsal to L7 and engaging the contralateral iliac wing with no sacral engagement has been described (Kudnig & Fitch , Yap et al . ) as either a sole fixation or as an adjunctive repair of a unilateral SI lag screw fixation (Kudnig & Fitch ). The only bilateral luxation treated in with a transilial bolt in the study by Yap et al .…”

“…The only bilateral luxation treated in with a transilial bolt in the study by Yap et al . () sustained pull through of the implant two days postoperatively. These techniques restore pelvic diameter but do not reduce or stabilise the SI joints directly.…”