RESUMO
Background: In Veterinary Medicine, there are several methods for early and accurate assessment of blood flow dynamics. The Dopplerfluxometry can access the peak systolic velocity, mean velocity and end diastolic velocity, including Resistive Index and Pulsatility Index. Normal values of Dopplerfluxometry in healthy dogs allow the identification of vascular abnormalities and authors knowledge there are no reference regarding the values of Dopplerfluxometry of the femoral artery in healthy dogs. The aim of the study was to assess the femoral Dopplerfluxometry of adult healthy dogs by Resistive Index, Pulsatility Index, systolic and diastolic velocities, and femoral artery diameter.Materials, Methods & Results: Eighteen healthy intact beagle dogs, male and female, aging from 2 to 4 years old (mean ± SD: mean 3 ± 0.8 years), weighing from 10.1-17.9 kg [22.3-39.5 lb] [mean ± SD: 14.3 ± 2.7 kg (31.5 ± 5.96 lb)] were used. The dogs underwent to physical examination, complete blood cell count, serum biochemistry examination urinalysis, and radiographs examination, muscular and cardiac evaluation. Females had to be in anestrous. All dogs were submitted to right femoral artery Dopplerfluxometry. The dogs were positioned in dorsal recumbency by one person without any chemical restraint. A high definition ultrasound device equipped with a 3 - 13 MHz multi-frequency linear transducer was used. The right femoral artery was identified with the transducer positioned transversely on the right triangle femoral area. Peak systolic velocity, end-diastolic velocity was measured. The Resistivity Index and Pulsatility Index were calculated automatically by the ultrasound machine software. Three measurements were obtained with the Doppler spectrum. The values of peak systolic velocity, end-diastolic velocity, Resistivity Index, Pulsatility Index and femoral artery diameter were expressed as Mean ± Standard Deviation (SD).[...](AU)
Assuntos
Animais , Adulto , Cães , Ultrassonografia Doppler/métodos , Ultrassonografia Doppler/veterinária , Artéria Femoral/anatomia & histologia , Padrões de Referência , Resistência Vascular , Pressão SanguíneaRESUMO
Background: In Veterinary Medicine, there are several methods for early and accurate assessment of blood flow dynamics. The Dopplerfluxometry can access the peak systolic velocity, mean velocity and end diastolic velocity, including Resistive Index and Pulsatility Index. Normal values of Dopplerfluxometry in healthy dogs allow the identification of vascular abnormalities and authors knowledge there are no reference regarding the values of Dopplerfluxometry of the femoral artery in healthy dogs. The aim of the study was to assess the femoral Dopplerfluxometry of adult healthy dogs by Resistive Index, Pulsatility Index, systolic and diastolic velocities, and femoral artery diameter.Materials, Methods & Results: Eighteen healthy intact beagle dogs, male and female, aging from 2 to 4 years old (mean ± SD: mean 3 ± 0.8 years), weighing from 10.1-17.9 kg [22.3-39.5 lb] [mean ± SD: 14.3 ± 2.7 kg (31.5 ± 5.96 lb)] were used. The dogs underwent to physical examination, complete blood cell count, serum biochemistry examination urinalysis, and radiographs examination, muscular and cardiac evaluation. Females had to be in anestrous. All dogs were submitted to right femoral artery Dopplerfluxometry. The dogs were positioned in dorsal recumbency by one person without any chemical restraint. A high definition ultrasound device equipped with a 3 - 13 MHz multi-frequency linear transducer was used. The right femoral artery was identified with the transducer positioned transversely on the right triangle femoral area. Peak systolic velocity, end-diastolic velocity was measured. The Resistivity Index and Pulsatility Index were calculated automatically by the ultrasound machine software. Three measurements were obtained with the Doppler spectrum. The values of peak systolic velocity, end-diastolic velocity, Resistivity Index, Pulsatility Index and femoral artery diameter were expressed as Mean ± Standard Deviation (SD).[...]
Assuntos
Animais , Adulto , Cães , Artéria Femoral/anatomia & histologia , Ultrassonografia Doppler/métodos , Ultrassonografia Doppler/veterinária , Padrões de Referência , Pressão Sanguínea , Resistência VascularRESUMO
The aim of the current study was to evaluate the resistivity index (RI) and pulsatility index (PI) of hepatic artery (HA) by Triplex Doppler in health adult dogs on pre and postprandial periods. The experimental group was formed by 14 mongrel dogs, 9 females and five males, weighing 6-19 kg and 4-16 kg, respectively. The animals were previously prepared, remaining 24 hours of starvation, and feeding with milk or pellet show food to perform posprandial analysis. The ultrasound PHILIPS HDI 4000 equipped with a micro convex transducer (5-8MHz) was used. The RI and PI measurements of HA were performed on tree times: T0 (pre-prandial period), T1 (30 minutes postprandial) and T2 (90 minutes postprandial). There are no statistical differences between T0 and T2 when compared RI and PI of HA. However, both indices were significantly diminished on T1 in relation with T0 and T2, which represents an increase of AH blood flow 30 min postprandial. The employment of HA Triplex Doppler improves the blood flow evaluation pre and posprandial and can be one important technique to establish comparative parameter to distinguish between hepatic metabolic homeostasis from different physiopathologics states. KEY WORDS: Dogs, hepatic artery, pulsatility index, resistivity index, ultrasound.
O objetivo deste trabalho foi avaliar por meio do triplex doppler as variações dos índices de resistividade (IR) e pulsatilidade (IP) da artéria hepática (AH) de cães adultos saudáveis em períodos pré e pós-prandiais. O grupo amostral foi composto por quatorze cães sem raça definida, sendo nove fêmeas e cinco machos com peso entre seis e dezenove quilos e quatro e dezesseis quilos, respectivamente. Previamente aos exames ultrassonográficos, os animais foram submetidos a 24 horas de jejum e, para os exames pós-prandiais, foram alimentados com leite ou ração comercial. Utilizou-se o ultrassom Philips HDI 4000, munido de um transdutor microconvexo (5-8MHz). Dividiram-se as mensurações dos IR e IP da AH em três tempos: T0 (período pré-prandial), T1 (trinta minutos pós-prandial) e T2 (noventa minutos pós-prandial). Não houve diferença estatística quando comparadas as médias de IR e IP da AH entre T0 e T2. No entanto, ambos os índices foram significativamente menores no T1 quando comparado com os outros períodos de análise, comprovando aumento de fluxo sanguíneo na AH trinta minutos pós-prandial. O uso do triplex doppler da AH possibilitou mensurações do fluxo sanguíneo pré e pós-prandial, sendo uma técnica importante para estabelecer parâmetros comparativos entre homeostasia metabólica e diferentes estados fisiopatológicos hepáticos.PALAVRAS-CHAVES: Artéria hepática, cães, índice de
RESUMO
The aim of the current study was to evaluate the resistivity index (RI) and pulsatility index (PI) of hepatic artery (HA) by Triplex Doppler in health adult dogs on pre and postprandial periods. The experimental group was formed by 14 mongrel dogs, 9 females and five males, weighing 6-19 kg and 4-16 kg, respectively. The animals were previously prepared, remaining 24 hours of starvation, and feeding with milk or pellet show food to perform posprandial analysis. The ultrasound PHILIPS HDI 4000 equipped with a micro convex transducer (5-8MHz) was used. The RI and PI measurements of HA were performed on tree times: T0 (pre-prandial period), T1 (30 minutes postprandial) and T2 (90 minutes postprandial). There are no statistical differences between T0 and T2 when compared RI and PI of HA. However, both indices were significantly diminished on T1 in relation with T0 and T2, which represents an increase of AH blood flow 30 min postprandial. The employment of HA Triplex Doppler improves the blood flow evaluation pre and posprandial and can be one important technique to establish comparative parameter to distinguish between hepatic metabolic homeostasis from different physiopathologics states. KEY WORDS: Dogs, hepatic artery, pulsatility index, resistivity index, ultrasound.
O objetivo deste trabalho foi avaliar por meio do triplex doppler as variações dos índices de resistividade (IR) e pulsatilidade (IP) da artéria hepática (AH) de cães adultos saudáveis em períodos pré e pós-prandiais. O grupo amostral foi composto por quatorze cães sem raça definida, sendo nove fêmeas e cinco machos com peso entre seis e dezenove quilos e quatro e dezesseis quilos, respectivamente. Previamente aos exames ultrassonográficos, os animais foram submetidos a 24 horas de jejum e, para os exames pós-prandiais, foram alimentados com leite ou ração comercial. Utilizou-se o ultrassom Philips HDI 4000, munido de um transdutor microconvexo (5-8MHz). Dividiram-se as mensurações dos IR e IP da AH em três tempos: T0 (período pré-prandial), T1 (trinta minutos pós-prandial) e T2 (noventa minutos pós-prandial). Não houve diferença estatística quando comparadas as médias de IR e IP da AH entre T0 e T2. No entanto, ambos os índices foram significativamente menores no T1 quando comparado com os outros períodos de análise, comprovando aumento de fluxo sanguíneo na AH trinta minutos pós-prandial. O uso do triplex doppler da AH possibilitou mensurações do fluxo sanguíneo pré e pós-prandial, sendo uma técnica importante para estabelecer parâmetros comparativos entre homeostasia metabólica e diferentes estados fisiopatológicos hepáticos.PALAVRAS-CHAVES: Artéria hepática, cães, índice de