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Hemodynamics of the pectinis oculi artery in American pekin ducks (Anas platyrhynchos domestica)
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AbstractObjectiveTo measure blood velocity parameters of the main detectable branch of the pectinis oculi artery and compare with values found in other arteries in other species to form a hypothesis of the function of the pecten oculi in birds.MethodsEleven American pekin ducks (Anas platyrhynchos domestica) without ocular diseases were examined with ocular Doppler ultrasonography. The pectinate artery resistive index (RI) and pulsatility index (PI) were calculated.ResultsThe mean of RI and PI values resulted, respectively, in: left eye (0.43 ± 0.07; 0.58 ± 0.13), right eye (0.37 ± 0.09; 0.47 ± 0.14), and both eyes (0.40 ± 0.08; 0.53 ± 0.14).DiscussionThe low RI and PI values found in the main branch of the pectinis oculi artery compared with other arteries in other tissues suggest a high metabolic activity in the pecten oculi, and it could indicate a nutritional function and/or intraocular pressure regulation.
Title: Hemodynamics of the pectinis oculi artery in American pekin ducks (Anas platyrhynchos domestica)
Description:
AbstractObjectiveTo measure blood velocity parameters of the main detectable branch of the pectinis oculi artery and compare with values found in other arteries in other species to form a hypothesis of the function of the pecten oculi in birds.
MethodsEleven American pekin ducks (Anas platyrhynchos domestica) without ocular diseases were examined with ocular Doppler ultrasonography.
The pectinate artery resistive index (RI) and pulsatility index (PI) were calculated.
ResultsThe mean of RI and PI values resulted, respectively, in: left eye (0.
43 ± 0.
07; 0.
58 ± 0.
13), right eye (0.
37 ± 0.
09; 0.
47 ± 0.
14), and both eyes (0.
40 ± 0.
08; 0.
53 ± 0.
14).
DiscussionThe low RI and PI values found in the main branch of the pectinis oculi artery compared with other arteries in other tissues suggest a high metabolic activity in the pecten oculi, and it could indicate a nutritional function and/or intraocular pressure regulation.
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