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Revista de otorrinolaringología y cirugía de cabeza y cuello

versión On-line ISSN 0718-4816

Resumen

PAPUZINSKI A, Cristián et al. Comparative study of human and pig larynxes: Towards a surgical training model. Rev. Otorrinolaringol. Cir. Cabeza Cuello [online]. 2020, vol.80, n.1, pp.9-18. ISSN 0718-4816.  http://dx.doi.org/10.4067/S0718-48162020000100009.

Introduction:

The domestic pig larynx has similarities with the human larynx. The elastic capacity of the vocal folds of the pig has the greater similarity with the human one compared with other animals. It has been proposed to use the porcine larynx as a model for surgical training.

Aim:

To determine the anatomical and histological differences and similarities between the pig larynx and the human larynx.

Material and method:

Measurements were made by 4 observers in 5 porcine larynxes whose results were compared with those described in the literature. In addition, histological sections were performed to visualize elastic fibers, neutral mucins and acid mucins.

Results:

The porcine thyroid cartilage measured 37.55 ±7.30 mm between the upper horns, 31.33 ±3.27 mm between lower horns and 34.32 ±7.30 mm from the laryngeal prominence to the posterior margin. In the cricoid cartilage, from the upper-lower edge in the anterior arch 7.28 ±2.21mm, height upper-lower edge posterior wall 27.47 ±3.40 mm, maximum posterior wall width 30.99 ±4.51 mm, anteroposterior inner diameter (head margin) 30.90 ±2.12 mm, inner diameter anteroposterior (caudal edge) 21.78 ±2.55 mm, inner diameter right-left (head edge) 18.11 ±2.13 mm, inner diameter right-left (caudal edge) 21.10 ±2.40 mm. Histologically, the pig and human larynxes present slight differences in the epithelium of each portion of the larynx, despite the fact that type of cartilage is the same in both species.

Conclusions:

Although there are anatomical and histological differences between the pig larynx and the human larynx, the porcine model is a useful, accessible and low cost alternative for training in laryngotracheal surgery and laryngeal microsurgery.

Palabras clave : Porcine larynx; thyroid cartilage; surgical training; laryngeal microsurgery.

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