Publikationsdatenbank

Pododermal angioarchitecture in the equine hoof wall:
a light and scanning electron microscopic study of the wall proper (2020)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

Sievers, H.

Hiebl, B.

Hünigen, H. (WE 1)

Hirschberg, R. M. (WE 1)

Quelle

Clinical hemorheology and microcirculation : blood flow and vessels

Bandzählung: 74

Heftzählung: 1

Seiten: 21 – 44

ISSN: 1386-0291

Sprache

Englisch

Verweise

URL (Volltext): https://content.iospress.com/articles/clinical-hemorheology-and-microcirculation/ch199233

DOI: 10.3233/CH-199233

Pubmed: 31771048

Kontakt

Institut für Veterinär-Anatomie

Koserstr. 20
14195 Berlin
+49 30 838 75784
anatomie@vetmed.fu-berlin.de

Abstract / Zusammenfassung

BACKGROUND:
Blood supply is an important factor for the normal function of the equine hoof, but earlier studies present conflicting data on functional characteristics of its angioarchitecture.

OBJECTIVE:
Emphasis was laid on demonstration of the microvascularisation in the different hoof wall regions, aiming at assessment of specialised vascular structures, e.g. vascular sphincter mechanisms and arteriovenous anastomoses.

METHODS:
The angioarchitecture of the adult pododerma in the equine hoof wall was examined by scanning electron microscopy of micro-corrosion casts assisted by exemplary histological and immuno-histochemical characterisation of the pododermal vasculature.

RESULTS:
The microvasculature of the lamellae and terminal papillae in all hoof wall regions was described in detail. Focal dilations and microvascular sphincters were a common feature. In contrast to former investigations, true arteriovenous anastomoses were detected at the base of the primary lamellae and the terminal papillae only, while thoroughfare channels proved a regular element within the microvasculature of the wall proper. Bicuspid venous valves were detected as regular feature. For the first time, the alpha-smooth muscle actin-reactivity of the microvascularisation in the hoof wall was systematically assessed, verifying its specialised vasomotor devices.

CONCLUSIONS:
The vasculature of the hoof wall displays specific angio-adaptations to high pressure and tensile load.