Ex vivo study of vagal branches at risk for iatrogenic injury during laryngoplasty in horses.

Pisano, Simone R. R.; Stoffel, Michael H.; Bodó, Gábor (2021). Ex vivo study of vagal branches at risk for iatrogenic injury during laryngoplasty in horses. Veterinary surgery, 50(2), pp. 425-434. Wiley-Blackwell 10.1111/vsu.13548

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Objective: To localize vagal branches within the surgical field of laryngoplasty and identify potentially hazardous surgical steps.

Study design: Observational cadaveric study.

Sample population: Five equine head-neck specimens and four entire equine cadavers.

Methods: Dissection of the pharyngeal region from a surgical perspective. Neuronal structures were considered at risk if touched or if the distance to instruments was less than 5 mm.

Results: The branches of the pharyngeal plexus (PP) supplying the cricopharyngeal muscle (PPcr), the thyropharyngeal muscle (PPth), and the esophagus (PPes) were identified in the surgical field in nine of nine, five of nine, and one of nine specimens, respectively. The internal branch of the cranial laryngeal nerve (ibCLN) was identified within the carotid sheath in six of nine specimens. The external branch of the cranial laryngeal nerve (ebCLN) was identified close to the septum of the caudal constrictors in nine of nine specimens. The blade of the tissue retractor compressed the ibCLN in six of six, the ebCLN in four of six, the PPcr in six of six, the PPth in two of three, and the PPes in two of two specimens in which the respective nerves were identified after further dissection. Surgical exploration of the dorsolateral aspect of the pharynx and the incision of the septum of the caudal constrictors harmed the ebCLN in nine of nine, PPcr in seven of nine, and PPth in four of eight specimens.

Conclusion: Several vagal branches were located in the surgical field and must be considered at risk because of their location.

Clinical significance: Use of the tissue retractor, dissection over the pharynx, and dissection of the septum of the caudal constrictors involve a risk to damage vagal branches.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Equine Clinic
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV)
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Anatomy

UniBE Contributor:

Pisano, Simone Roberto Rolando; Stoffel, Michael Hubert and Bodó, Gabor

Subjects:

500 Science
500 Science > 570 Life sciences; biology
500 Science > 590 Animals (Zoology)
600 Technology > 610 Medicine & health

ISSN:

0161-3499

Publisher:

Wiley-Blackwell

Language:

English

Submitter:

Vanessa Alice Blum

Date Deposited:

03 Dec 2020 14:27

Last Modified:

27 Jan 2021 01:33

Publisher DOI:

10.1111/vsu.13548

PubMed ID:

33264429

BORIS DOI:

10.7892/boris.148926

URI:

https://boris.unibe.ch/id/eprint/148926

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