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Recurrent thoracolumbar intervertebral disc extrusion after hemilaminectomy and concomitant prophylactic fenestration in 662 chondrodystrophic dogs.
Vet Surg. 2012 Apr; 41(3):381-90.VS

Abstract

OBJECTIVES

To determine the prevalence and location of recurrent thoracolumbar intervertebral disc extrusion (T-L IVDE) after hemilaminectomy with prophylactic fenestration (PF) and to document PF-related complications.

STUDY DESIGN

Retrospective case series.

SAMPLE POPULATION

Chondrodystrophic dogs (n = 793).

METHODS

In 662 successfully recovered dogs (>1 year follow-up), the prevalence of dogs with recurrent T-L IVDE that required a 2nd surgery and dogs with clinical signs that improved without surgery was evaluated. Prevalence of second disc extrusions (SDEs) within T11-L4 intervertebral discs was compared between PF discs and non-PF discs.

RESULTS

T-L SDEs were intraoperatively confirmed in 15 dogs (2.3%), 2-61 months after initial surgery and 66 dogs (10.0%) had signs of T-L IVDE recurrence that improved without surgery (mean follow-up, 44.7 months). No dog had further extrusion at the initial T-L site. SDE occurred at a PF disc (n = 1), adjacent to PF discs (8), or at distant discs (6). Prevalence of SDE in non-PF discs was 26.2 times higher than PF discs (95% CI: 3.4, 203.4; P < .001). Major PF-related complications included iatrogenic introduction of the disc material into the spinal canal (n = 1), and vertebral subluxation/instability (3) at 1-88 months postoperatively.

CONCLUSION

SDE is more likely to occur at non-PF discs than PF discs when PF is performed at spaces predisposed to disc extrusion. PF is a safe and effective treatment to prevent SDE in chondrodystrophic dogs.

Authors+Show Affiliations

Aikawa Veterinary Medical Center, Tokyo, Japan. taikawa@wb3.so-net.ne.jpNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22380868

Citation

Aikawa, Takeshi, et al. "Recurrent Thoracolumbar Intervertebral Disc Extrusion After Hemilaminectomy and Concomitant Prophylactic Fenestration in 662 Chondrodystrophic Dogs." Veterinary Surgery : VS, vol. 41, no. 3, 2012, pp. 381-90.
Aikawa T, Fujita H, Shibata M, et al. Recurrent thoracolumbar intervertebral disc extrusion after hemilaminectomy and concomitant prophylactic fenestration in 662 chondrodystrophic dogs. Vet Surg. 2012;41(3):381-90.
Aikawa, T., Fujita, H., Shibata, M., & Takahashi, T. (2012). Recurrent thoracolumbar intervertebral disc extrusion after hemilaminectomy and concomitant prophylactic fenestration in 662 chondrodystrophic dogs. Veterinary Surgery : VS, 41(3), 381-90. https://doi.org/10.1111/j.1532-950X.2012.00970.x
Aikawa T, et al. Recurrent Thoracolumbar Intervertebral Disc Extrusion After Hemilaminectomy and Concomitant Prophylactic Fenestration in 662 Chondrodystrophic Dogs. Vet Surg. 2012;41(3):381-90. PubMed PMID: 22380868.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Recurrent thoracolumbar intervertebral disc extrusion after hemilaminectomy and concomitant prophylactic fenestration in 662 chondrodystrophic dogs. AU - Aikawa,Takeshi, AU - Fujita,Hiroshi, AU - Shibata,Mitsuhiro, AU - Takahashi,Taishi, Y1 - 2012/03/01/ PY - 2012/3/3/entrez PY - 2012/3/3/pubmed PY - 2013/7/3/medline SP - 381 EP - 90 JF - Veterinary surgery : VS JO - Vet Surg VL - 41 IS - 3 N2 - OBJECTIVES: To determine the prevalence and location of recurrent thoracolumbar intervertebral disc extrusion (T-L IVDE) after hemilaminectomy with prophylactic fenestration (PF) and to document PF-related complications. STUDY DESIGN: Retrospective case series. SAMPLE POPULATION: Chondrodystrophic dogs (n = 793). METHODS: In 662 successfully recovered dogs (>1 year follow-up), the prevalence of dogs with recurrent T-L IVDE that required a 2nd surgery and dogs with clinical signs that improved without surgery was evaluated. Prevalence of second disc extrusions (SDEs) within T11-L4 intervertebral discs was compared between PF discs and non-PF discs. RESULTS: T-L SDEs were intraoperatively confirmed in 15 dogs (2.3%), 2-61 months after initial surgery and 66 dogs (10.0%) had signs of T-L IVDE recurrence that improved without surgery (mean follow-up, 44.7 months). No dog had further extrusion at the initial T-L site. SDE occurred at a PF disc (n = 1), adjacent to PF discs (8), or at distant discs (6). Prevalence of SDE in non-PF discs was 26.2 times higher than PF discs (95% CI: 3.4, 203.4; P < .001). Major PF-related complications included iatrogenic introduction of the disc material into the spinal canal (n = 1), and vertebral subluxation/instability (3) at 1-88 months postoperatively. CONCLUSION: SDE is more likely to occur at non-PF discs than PF discs when PF is performed at spaces predisposed to disc extrusion. PF is a safe and effective treatment to prevent SDE in chondrodystrophic dogs. SN - 1532-950X UR - https://www.unboundmedicine.com/medline/citation/22380868/Recurrent_thoracolumbar_intervertebral_disc_extrusion_after_hemilaminectomy_and_concomitant_prophylactic_fenestration_in_662_chondrodystrophic_dogs_ L2 - https://doi.org/10.1111/j.1532-950X.2012.00970.x DB - PRIME DP - Unbound Medicine ER -