Ocular echobiometry and relationship with cranial and body morphometric parameters in Shih Tzu dogs

Santos, M.A.P.; Zacarias Junior, A.; Porto, E.P.; Oliveira, M.L.R.

doi:10.1590/1678-4162-12323

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Veterinary Medicine • Arq. Bras. Med. Vet. Zootec. 74 (5) • Sep-Oct 2022 • https://doi.org/10.1590/1678-4162-12323 copy

Ocular echobiometry and relationship with cranial and body morphometric parameters in Shih Tzu dogs

[Ecobiometria ocular e relação com a morfometria craniana e corporal em cães Shih Tzu]

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The purpose of this paper is to determine the ocular echobiometry and investigate its correlation with cranial and body morphometric parameters in 50 adult Shih Tzu dogs. The echobiometric measurements of the anterior chamber (AC), vitreous chamber (VC), lens axial thickness (LTA), transverse lens thickness (LTT), and axial length of the eyeball (ALE) were obtained by two-dimensional ultrasonography. Morphometric measurements of bizygomatic distance (BDIST), frontal-occipital distance (FOD), withers height (WH), thoracic circumference (TC), and body length (BL) were also obtained. The mean of the AC depth was 2.83±0.50mm, the VC was 9.18±0.54mm, the LTA was 6.42±0.32mm and the LTT was 9.17±1.18mm, while the mean of the ALE was 18.82±0.66mm. There was no correlation between ocular echobiometric variables and cranial and body morphometric variables in adult dogs of the Shih Tzu breed, as well as no significant difference of these variables when considering gender and age of the dogs (p ≥ 0.05).

Keywords:
canines; biometrics; ultrasonography; ocular anatomy; ophthalmology

Ocular Variables	Mean (mm)	Standard Deviation	Minimum (mm)	Minimum (mm)
Anterior Chamber (AC)	2.83	0.50	1.51	4.10
Vitreous Chamber (VC)	9.18	0.54	8.02	10.21
Lens Thickness on the Axial Section (LTA)	6.42	0.32	5.27	6.95
Lens thickness on the transversal section (LTT)	9.17	1.18	5.27	12.41
Axial length of the eyeball (ALE)	18.82	0.66	17.50	20.24

Morphometric Variables		Gender
		Male	Female	p-value
Bizygomatic distance (mm)	MeanStandard deviation	77.80	74.50	0.07
		7.07	5.51
Frontal-occipital distance (mm)	MeanStandard deviation	75.10	73.73	0.45
		5.90	6.60
Withers height (mm)	MeanStandard deviation	273.75	263.73	0.09
		21.00	20.30
Thoracic circumference (mm)	MeanStandard deviation	425.65	413.06	0.35
		37.61	51.16
Body length (mm)	MeanStandard deviation	546.2	521.83	0.13
		59.82	53.24

	AC¹ OS^a	AC OD^b	VC² OS	VC OD	ATHK³ OS	ATHK OD	TL⁴ OS	TL OD	ALE⁵ OS	ALE OD
BDIST⁷ FOD⁸ WH⁹ TC¹⁰ BL¹¹	Cor 0.17	Cor -0.02	Cor 0.15	Cor -0.09	Cor 0.23	Cor 0.11	Cor 0.06	Cor -0.22	Cor 0.13	Cor 0.24
BDIST⁷ FOD⁸ WH⁹ TC¹⁰ BL¹¹	p-value 0.22 Cor 0.18 p-value 0.20 Cor -0.05 p-value 0.69 Cor 0.01 p-value 0.93 Cor 0.11 p-value 0.41	p-value 0.85 Cor -0.00 p-value 0.94 Cor 0.15 p-value 0.29 Cor -0.11 p-value 0.41 Cor -0.05 p-value 0.69	p-value 0.29 Cor 0.02 p-value 0.84 Cor 0.02 p-value 0.85 Cor 0.07 p-value 0.59 Cor -0.17 p-value 0.21	p-value 0.50 Cor -0.26 p-value 0.06 Cor 0.08 p-value 0.57 Cor -0.06 p-value 0.66 Cor 0.12 p-value 0.38	p-value 0.10 Cor 0.17 p-value 0.21 Cor 0.07 p-value 0.62 Cor 0.23 p-value 0.09 Cor 0.08 p-value 0.55	p-value 0.42 Cor 0.18 p-value 0.19 Cor 0.05 p-value 0.68 Cor 0.10 p-value 0.47 Cor 0.04 p-value 0.73	p-value 0.63 Cor 0.10 p-value 0.46 Cor 0.16 p-value 0.25 Cor -0.19 p-value 0.17 Cor 0.10 p-value 0.47	p-value 0.12 Cor -0.24 p-value 0.08 Cor 0.00 p-value 0.97 Cor -0.13 p-value 0.36 Cor 0.01 p-value 0.93	p-value 0.35 Cor 0.14 p-value 0.31 Cor -0.05 p-value 0.68 Cor 0.21 p-value 0.13 Cor 0.03 p-value 0.82	p-value 0.09 Cor -0.02 p-value 0.88 Cor 0.15 p-value 0.27 Cor 0.17 p-value 0.23 Cor 0.29 p-value 0.03

Universidade Federal de Minas Gerais, Escola de Veterinária Caixa Postal 567, 30123-970 Belo Horizonte MG - Brazil, Tel.: (55 31) 3409-2041, Tel.: (55 31) 3409-2042 - Belo Horizonte - MG - Brazil
E-mail: abmvz.artigo@gmail.com

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[1] Corresponding author:
maiconalanps@gmail.com