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Mammary Blood Flow and Venous Drainage in Cows

Yverets blodgennemstrømning og dets venøse afløb

Abstract

The mammary blood flow and the udder drainage in vivo evaluated using the antipyrine absorption method has been compared with the anatomical findings in the udder after slaughtering of the experimental cows (Table 1).

Because of the orientation of the valves in the perineal veins and blood samples taken in vivo it must be assumed that the perineal veins lead blood toward the veins at the udder base.

It is concluded that the drainage of the udder in standing cows will primarily be through the milk veins, eventually there will be a flow of non-mammary venous blood down the external pudic veins at the udder base, as in the case of the perineal veins.

Sammendrag

Yverets blodgennemstrømning og venøse blodafløb in vivo (bestemt ved hjælp af antipyrin-absorptionsmetoden) er blevet sammenholdt med de fundne anatomiske forhold i yverets venøse karsystem efter slagtning af forsøgskøerne (tabel 1).

På grundlag af veneklappernes orientering i vv. perinei samt blodprøver udtaget in vivo (fig. 1 og 2) må det antages, at vv. perinei fører venøst blod til yverets venøse afløbssystem.

Det konkluderes, at yverets venøse afløb hos stående køer sandsynligvis udelukkende sker gennem vv. subcutaneae abdominis; eventuelt kan der gennem vv. pudendae externae flyde venøst blod ned til venerne i yverets basis, i lighed med vv. perinei.

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Kjœrsgaard, P. Mammary Blood Flow and Venous Drainage in Cows. Acta Vet Scand 15, 179–187 (1974). https://doi.org/10.1186/BF03547479

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