Postnatal development of canine axial globe length measured by B‐scan ultrasonography

Tuntivanich, Nalinee; Petersen‐Jones, Simon M.; Steibel, Juan P.; Johnson, Chris Plauché; Forcier, Janice Q.

doi:10.1111/j.1463-5224.2007.00481.x

Cited by 38 publications

(42 citation statements)

References 9 publications

(6 reference statements)

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“…This finding was also reported by Tuntivanich et al (2007). Boroffka (2005) assessed the intraeye structure development in four fetuses in prenatal care and in 11 puppies in postnatal care using B-scan ultrasonography and observed that both in the pre-and post natal care there was continuous growth of the eye depth, anterior chamber, lens and vitreous chamber.…”

Section: Discussionsupporting

confidence: 59%

“…According to the statistical analysis, there was no evidence of difference (p>0.05) in the measurements of the eyeball segments between the right and left eyes (Table 1), that presented great homogeneity, as reported by Schiffer et al (1982), Gaiddon et al (1991), Williams (2004), Boroffka et al (2006), Tuntivanich et al (2007) and Beserra et al (2009).…”

Section: Discussionmentioning

confidence: 53%

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Biometric, B-mode and color Doppler ultrasound assessment of eyes in healthy dogs

et al. 2018

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B-scan ultrasonography is an important diagnostic tool that allows characterization of internal organ anatomy and, when complemented by Doppler ultrasound, allows vascular hemodynamic assessment, increasing the diagnostic accuracy. Thus, the aim of the present study was the B-scan ultrasound characterization and measurement of the eyeball segments and assessment of the external ophthalmic artery by color and pulsed Doppler. Sixty eyeballs were assessed from 30 dogs of different breeds using an 8.5MHz microconvex transductor. First, biometry was performed by B-scan of the following segments: axial length (M1), anterior chamber depth (M2), lens thickness (M3), lens length (M4), vitreous chamber depth (M5), optical disc length (M6) and optic nerve diameter (M7). Colored Doppler identified the external ophthalmic article and pulsed Doppler assessed its flow, and the following were measured: systolic peak velocity (VPS), final diastolic velocity (VDF), resistivity index (IR) and pulse index (IP). No statistical difference was observed for the biometric values of the eye segments between the right and left eyes (p>0.05). The vitreous chamber depth (M5) was shown to be the biometric variable with greatest bilateral symmetry, varying from 0.79 to 0.87cm and 0.78 to 0.86cm for the right and left eye, respectively. The ophthalmic artery was visualized over the optic nerve towards the eyeball, with flow stained red. There was no significant statistical difference between the Doppler velocimetric values for the ophthalmic artery between the right and left eye of the animals assessed (p>0.05). The mean resistivity index (RI) showed average values equal to 0.63±0.03, bilaterally. The mean base velocity was 17.50cm/s and 18.18cm/s at the systolic peak and 6.21cm/s and 6.68cm/s at the end of the diastole, for the right and left eyes respectively. The anatomic, biometric and hemodynamic characterization using the ultrasound B-scan and the Doppler modalities permitted the ultrasonographic and Doppler velocimetric assessment of the eyeball components in dogs of different breeds, and it can be used in ophthalmic clinical routine to identify eye pathologies.

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 53%

Biometric, B-mode and color Doppler ultrasound assessment of eyes in healthy dogs

et al. 2018

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“…No differences were observed between mean values found for intraocular structures when comparing between right and left eyes of animals from the same conformational group, which is in agreement with data reported by other authors (Williams, 2004;Tuntivanich et al, 2007). With this, it is possible to say that measurements of the normal eye can provide reliable parameters for determination of the size of eye prosthesis in cases of malformation or enucleation of the opposite eye.…”

Section: Resultssupporting

confidence: 81%

Ophthalmic ultrasound of dogs with different skull conformations

Toni

Meirelles

Laus

et al. 2013

Agraria

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The aim of this study was to establish mean values for intraocular structures and analyse if the differences are present for different skull conformations in dogs. In this study, 30 dogs were selected and distributed into three groups according to skull conformation; thus, group 1 (G1) was composed of brachycephalic dogs, group 2 (G2) was composed of mesocephalic dogs and group 3 (G3) was composed of dolichocephalic dogs. A and B-mode ultrasound was performed simultaneously for obtainment of measurements relating to anterior chamber depth (D1); lens thickness (D2); vitreous chamber depth (D3); and the axial length of the eye (D4). No differences were observed when comparing left and right eyes of dogs within the same skull conformation group (p>0.05). Differences were observed when comparing D3 and D4 between groups G2 and G3 (p<0.05). Skull conformation of brachycephalic dogs did not influence intraocular measurement values when compared to dolicephalic and mesocephalic dogs. Skull conformation of dolichocephalic dogs had an influence in values of vitreous chamber and the complete length of the eye when compared to mesocephalic dogs.Key words: brachycephalic, dolichocephalic, eye, mesocephalic, ultrasound Ultrassonografia oftálmica em cães com diferentes conformações cranianas RESUMOO objetivo deste estudo foi estabelecer valores médios para as estruturas intraoculares e analisar se existem diferenças entre eles nas diversas conformações cranianas de cães. Foram selecionados 30 cães alocados em três grupos, de acordo com a conformação craniana; assim, o grupo 1 (G1) foi composto por cães braquicefálicos, o grupo 2 (G2) por cães mesocefálicos e o grupo 3 (G3) por cães dolicocefálicos; ultrassonografia em modo A e B foi realizada simultâneamente para obtenção de medidas relacionadas à profundidade de câmara anterior (D1), espessura de lente (D2), profundidade de câmara vítrea (D3) e comprimento axial do bulbo do olho (D4); diferenças não foram observadas quando comparados olhos direitos e esquerdos de cães com mesma conformação craniana (p > 0,05). Diferenças foram constatadas na comparação entre D3 e D4 dos grupos G2 e G3 (p < 0,05); a conformação do crânio braquicefálico não influenciou nos valores das medidas intraoculares quando comparados aos valores encontrados para cães dolicocefálicos e mesocefálicos; a conformação do crânio dolicocefálico influenciou nos valores das medidas intraoculares de profundidade de câmara vítrea e profundidade do bulbo do olho quando comparados aos valores encontrados para cães mesocefálicos.

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“…De acordo com o relatado por outros autores (Gilger et al 1998, Gonçalves et al 2000, Tuntivanich et al 2007, Beserra et al 2009, Gonçalves et al 2009) a comparação entre os olhos direito e esquerdo, em ambos os grupos deste estudo, não diferiram à estatística. Porém, contrariando o relatado por estes autores, foi observada diferença significativa em D4 de machos e fêmeas no grupo GB, apresentando as fêmeas, medida superior a dos machos.…”

Section: Discussionunclassified

Relação entre a biometria ultrassonográfica ocular e os parâmetros morfométricos do crânio, idade, peso e gênero em gatos domésticos

Ferreira¹,

Allemann

Dias

et al. 2014

Pesq. Vet. Bras.

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Pesq. Vet. Bras. 34(2):192-198, fevereiro 2014 192 RESUMO.-O exame ultrassonográfico ocular é indispensá-vel no pré-operatório de procedimentos cirúrgicos intraoculares como a facectomia, além de ser uma ferramenta complementar ao exame oftalmológico, em casos de perda da transparência dos meios ópticos. A inexistência de estudos acerca de padrões de normalidades para as medidas do bulbo ocular e de suas estruturas internas nos gatos, cujos valores possibilitam o monitoramento de enfermidades e auxiliam em procedimentos cirúrgicos motivaram este estudo. Utilizaram-se 40 gatos, adultos, machos e fêmeas, livres de enfermidades sistêmica e oftalmológica. Destes, 22 eram da raça persa (grupo braquicefálico -GB) e 18 sem raça definida (grupo não braquicefálico -GNB). A biometria ultrassonográfica ocular transcorneana foi realizada, em modo-B∕A, com o transdutor microlinear de 9 MHz e as medidas D1 (profundidade da câmara anterior), D2 (diâ-metro do cristalino), D3 (profundidade da câmara vítrea) e D4 (diâmetro axial do bulbo ocular) aferidas. Ainda, menRelação entre a biometria ultrassonográfica ocular e os parâmetros morfométricos do crânio, idade, peso e gênero em gatos domésticos Ocular ultrasonography is a helpful ophthalmic examination, performed on the absence of transparency in ocular means and frequently requested prior intraocular surgery. Unfortunately, the lack of studies upon ultrasonografic images of the normal feline eye, difficults the evaluation of its biometry and its inner structures in many ophthalmic diseases and also before surgery. The objective of this study was to evaluate the ocular biometry and the morphometric parameters of the cranium of 40 healthy adult cats, including 22 Persian cats (Brachycephalic group -BG) and 18 Mixed-breed cats (Noun brachycephalic group -NBG). B/A-mode ultrasonographic biometry, utilizing a 9 MHz probe, was performed for depth of the anterior chamber (D1), lens axial length (D2), depth of the vitreous chamber (D3) and axial length of the globe (D4). Morphometric parameters of the cranium were obtained for bizygomatic (BZ) and occipital frontal (OF) diameters. Data was collected and statistical analysis, including "t" paired tests, variance and covariance analysis and multiple linear regressions was performed for every obtained measure and also for animal ages, weigh and gender. Statistic relevant values were observed in D4 parameter for female cats of BG. Multiple linear regression indicated some influence of the weigh, age and OF in D1, D2 and D4 of PG; and of BZ in D1, D3 and D4 of NBG. Besides that, it was observed that biometry was also influenced by weigh, age and morphometric parameters of their craniums in both groups.

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Postnatal development of canine axial globe length measured by B‐scan ultrasonography

Abstract: A reverse transformation of the formula can be used to predict AGL in mesocephalic cross-bred dogs: AGL = 10.847 * age in weeks 0.1653.

Cited by 38 publications

References 9 publications

Biometric, B-mode and color Doppler ultrasound assessment of eyes in healthy dogs

Biometric, B-mode and color Doppler ultrasound assessment of eyes in healthy dogs

Ophthalmic ultrasound of dogs with different skull conformations

Relação entre a biometria ultrassonográfica ocular e os parâmetros morfométricos do crânio, idade, peso e gênero em gatos domésticos

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