Successful closed reduction of an atlantoaxial luxation in a mature Warmblood horse

Gerlach, Kerstin; Muggli, L.; Lempe, A.; Breuer, Julia; Brehm, Walter

doi:10.1111/j.2042-3292.2011.00284.x

Cited by 8 publications

(17 citation statements)

References 3 publications

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“…For a subluxation of the atlantoaxial articulation with presence of neurological signs, the recommended surgical treatment has been an arthrodesis with a standard LCP or a distal femur LCP . For a complete luxation of the atlantoaxial articulation, nonsurgical treatment is indicated, provided closed reduction is possible . The reduction of the luxation can be attempted by manipulation of the head and neck under general anesthesia; however, the successful reposition is usually possible only in acute injuries, and reluxation has been described .…”

Section: Discussionmentioning

confidence: 99%

Internal fixation of a complete ventral luxation of the dens axis in an American quarter horse yearling

et al. 2019

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Objective To report surgical treatment of a complete luxation of the atlantoaxial articulation with a 4.5‐mm T‐locking compression plate (T‐LCP) in a horse. Study design Case report. Animals A one‐year‐old American quarter horse filly. Methods A one‐year‐old American quarter horse filly presented with a complete luxation of the atlantoaxial articulation. Closed and open reduction of the luxation were attempted under general anesthesia with the aid of a pulley system. Because the manual reduction was unsuccessful, the dens axis was excised, and the atlas and axis were stabilized with a 4.5‐mm T‐LCP. Four 5.5‐mm cortex screws were placed across the atlantoaxial articulation in lag fashion to provide additional stability. Results The horse made an uneventful recovery from surgery and remained comfortable thereafter. Nine months postsurgery, the filly had developed normally and did not show any sign of ataxia or reduced mobility of the cranial neck. Conclusion The described surgical approach resulted in the successful stabilization of a complete luxation of the atlantoaxial articulation in an American quarter horse yearling, with a favorable outcome. Clinical significance Complete atlantoaxial luxation is associated with a poor prognosis for survival in horses. This is the first report of a favorable outcome after surgical stabilization. The described approach presents a valuable alternative to the manual reduction of atlantoaxial luxation in horses.

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Section: Discussionmentioning

confidence: 99%

Internal fixation of a complete ventral luxation of the dens axis in an American quarter horse yearling

et al. 2019

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“…O ccipitoatlantoaxial (OAA) dislocation is not common in the horse; however, to date, few case reports have been published with congenital or acquired (trauma) primary causes. Congenital OAA malformation is rare and is described primarily in Arabian breeds, although other breeds have also been reported over recent years .…”

Section: Introductionmentioning

confidence: 99%

“…Atlantoaxial subluxation can be suspected clinically, but diagnostic imaging is mandatory for pre‐mortem confirmation. The typical features include malalignment of the atlas and axis, with ventral displacement of the axis in most instances . Variable degrees of axial rotation of the axis and/or atlas may be present .…”

Section: Introductionmentioning

confidence: 99%

“…In people, absence, stretching, or disruption of the transverse ligament may be an indication for early surgical intervention . In horses, different conservative or surgical treatments for the correction of OAA subluxation have been proposed . The MRI diagnosis of any ligament injuries, together with secondary complications, such as compression of the spinal cord by bony fragments, severe displacement of the odontoid process or extradural haemorrhage, development of inflammatory pannus, or the degree of narrowing of the vertebral canal due to callus formation, could have an impact on the understanding of the pathophysiological mechanisms of instability in this region.…”

Section: Introductionmentioning

confidence: 99%

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3 Tesla Magnetic Resonance Imaging of the Occipitoatlantoaxial Region in the Normal Horse

Gutiérrez-Crespo

Kircher

Carrera

2013

Vet Radiology Ultrasound

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The aim of this study was to describe the appearance of the ligamentous structures of the occipitoatlantoaxial (OAA) region in the normal horse by 3 tesla (3T) magnetic resonance imaging (MRI). The MRI images of the longitudinal odontoid ligament, tectorial membrane, dorsal and ventral atlantoaxial ligaments, dorsal atlantooccipital membrane with its reinforcing ligaments, and the lateral atlantooccipital ligaments of 10 horse cadavers were evaluated. All ligaments and membranes were identified in all planes, except for the lateral atlantooccipital ligament in the sagittal plane due to its cranioventrolateral course. All were iso to mildly hypointense to musculature of the neck in T1W with the exception of the tectorial membrane that was moderately hypointense; moderately hypointense in PD-SPIR, and markedly hypointense (isointense to cortical bone) in T2W. The PD-SPIR was the best sequence to identify all ligaments and membranes from their cranial and caudal attachments. The longitudinal odontoid ligament, ventral atlantoaxial ligament, and reinforcing bands of the dorsal atlantooccipital membrane presented a characteristic striped heterogeneous signal behavior thought to be due to fibrocartilaginous content. The remaining ligaments and membranes showed homogeneous signal intensity. Special anatomical features in this species such as the fan-shaped longitudinal odontoid ligament, absence of the transverse ligament and presence of the ventral atlantoaxial ligament were documented. Ligamentous structures that stabilize the equine OAA region were described with MRI in this study and these findings could serve as an anatomic reference for those cases where instability of this region is suspected.

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“…Let me first state that I was most impressed with the very pragmatic approach used by the authors of the preceding case report (Gerlach et al . 2012) in the successful treatment of this rare condition.…”

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confidence: 99%

Successful treatment of atlantoaxial luxation using closed reduction

Grant¹

2012

Equine Veterinary Education

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Successful closed reduction of an atlantoaxial luxation in a mature Warmblood horse

Cited by 8 publications

References 3 publications

Internal fixation of a complete ventral luxation of the dens axis in an American quarter horse yearling

Internal fixation of a complete ventral luxation of the dens axis in an American quarter horse yearling

3 Tesla Magnetic Resonance Imaging of the Occipitoatlantoaxial Region in the Normal Horse

Successful treatment of atlantoaxial luxation using closed reduction

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