Anatomy and morphometric aspects of the trachea of Saimiri sciureus Linnaeus, 1758: knowledge for emergency procedures

Abstract

The aim of this work is to study the morphological characteristics of the trachea of Saimiri sciureus through quantification and measurement of the cartilaginous rings, providing information to facilitate the election of more appropriate endotracheal tube, laryngeal mask or tracheostomy tube for anesthetic and emergency procedures, as it is a species of Neotropical primates most commonly used as biological models, and little is known about their morphology. Nine animals were investigated, being 4 adults and 5 young acquired from the Centro Nacional de Primatas (National Primate Center -CENP) -Ananindeua -PA, which died from natural causes and then fixed in aqueous buffered formalin 10%. Saimiri sciureus trachea comprises an average of 32.8 incomplete rings and an average length of 3.74 cm in young animals, while in adults it demonstrated an average of 30.25 rings and average length of 3.67 cm. The shape of the light and its proportion varied along the trachea. Endotracheal tube with a diameter the 2.0 -2.5mm, laryngeal mask number 1.0 or tracheostomy tube neonatal Shiley number 3.0, can be placed in animals weighing 600g -1.2 Kg. Given the great importance of the species studied, which is widely used as a biological model, the detailing on the morphology and morphometry of tracheal animal studies provides new approaches needed in respiratory emergency, as well as, facilitates the development of future anesthetic protocols.

Trachea and lung anatomy applied to clinical and surgical procedures in Sapajus libidinosus (Spix, 1823)

“…The trachea wall in the S libidinosus presented on average 32 rings, close to that found in the Saimiri sciureus with a mean of 32.8 rings, different from humans who have 16 to 20 rings, Sapajus apella with 29 to 30 rings. However, the difference in the quantity is justified by the body structure of each species and the familiarity between the species S apella , S libidinosus, and S sciureus justifies the similarity between their results.…”

Morfologia da traqueia e lobação pulmonar de Leopardus pardalis (jaguatirica)

“…Nos seus aspectos macroscópicos a traqueia de Leopardus pardalis é similar a das espécies de animais silvestres como Sapajus apela (Leonel et al 2013), Nasua nasua , Saimiri sciureus (Pinheiro et al 2012) e carnívoros domésticos (Dyce et al 2010), diferindo de Bradypus variegatus (Faro et al 2015) que apresentava sinuosida des em sua porção médio caudal. A quantidade de anéis e comprimento traqueal variou entre os espécimes estudados, assim como em Didelphis sp. )…”

Morphometric properties of larynx and trachea in the New Zealand rabbit

“…The average length of trachea was indicated as 19. 5 cm in the dog (Dabanoglu et al 2001), 257 mm in red sokoto goat (Byanet et al 2014), 54.1±0.73 cm in Arabian oryx (Al-Zhgoul et al, 2013), 3.74 cm in the young and 3.67 cm in adults Saimiri sciureus (Pinheiro et al 2012), 78.28±4.03 cm males and 75.39±5.27 cm in females horses (Freitas et al 2001). In this study the length of trachea was statistically insignificant between the genders but it was statistically different in horse (Freitas et al 2001).…”