Progression of Venographic Changes After Experimentally Induced Laminitis

Baldwin, Gregory; Pollitt, Christopher C.

doi:10.1016/j.cveq.2009.12.005

Cited by 26 publications

(30 citation statements)

References 3 publications

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“…This is particularly observed in chronic laminitis with adipose tissue fibrosis and predisposition to sole ulcers (Lischer & Ossent 2002) compromising the microcirculation of the digit and worsening the symptoms (Baldwin & Pollitt 2010). The subclinical laminitis, cracking and erosion of the hoof can also damage the digital cushion structures, so the correction of weight bearing aplomb and hoof trimming ensure the integrity of the digital cushion, preventing the appearance of lesions on the hoof (Higuch 2005, Schöpke 2013).…”

Section: Discussionmentioning

confidence: 99%

Morphoquantitative description of bovine digital cushion

et al. 2015

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RESUMO.-[Descrição morfoquantitativa do tórus digital de bovinos.] O tórus digital é caracterizado como um tecido subcutâneo modificado que atua na absorção do impacto durante a locomoção, auxilia o retorno venoso do casco e mantêm o suporte de uma considerável parte do peso corporal. Os tórus possuem particular importância nas patogêneses de casco, já que eles precisam trabalhar corretamente para prevenir compressões e traumas nos tecidos moles. Assim, o objetivo deste estudo foi quantificar e com isso determinar, como se arranjam estas estruturas, para tanto, foram estabelecidas as proporções dos tecidos conjuntivo, adiposo, vascular e ainda das fibras colágenas e dos tipos de colágenos encontrados nos tórus digitais palmares e plantares de bovinos. Foram utilizados membros torácicos e pélvicos de doze bovinos zebuínos adultos, de ambos os sexos, sendo onze machos e uma fêmea, com peso The digital cushion is characterized as a modified subcutaneous tissue that absorbs the shock during gait, assists venous return of the hoof and supports a considerable part of body weight. Digital cushions have particular importance in the pathogenesis of the hoof, since they need to properly work in order to prevent compression and traumas in soft tissues. This study aimed to measure and determine how is the arrangement of these structures, and for this it was established the proportions of connective, adipose, vascular tissues and collagen fibers and collagen types found in palmar and plantar digital cushion of bovine using fore and hindlimbs of twelve adult zebu cattle of both sexes, 11 male and one female, with 269kg average carcass weight and without limb disorders. Fragments of cushions were subjected to conventional histology, cut to a thickness of 4µm and stained with Red Picrosirius. With digital optical microscope, the quantification of the connective tissue and differentiation of types of collagen used the Image Pro Plus ® software, and of adipose and vascular tissue, the test point system. The mean and standard error were estimated with the GraphPad Prism 5.0 software, and then data were subjected to Kolmogorov-Smirnov normality test and Student's t-test with significance level set at 5% for determining the amount of different tissues between fore and hindlimbs of studied animals. In forelimbs the mean and standard error of the connective tissue proportion was 50.10%+1.54, of the adipose tissue was 21.34%+1.44, and of vascular tissue was 3.43%+0.28. Hindlimbs presented a proportion of connective tissue of 61.61%+1.47, 20.66%+1.53 of adipose tissue, and 3.06%+0.20 of vascular tissue. A significant difference (p<0.001) was detected in the connective tissue proportion between fore and hindlimbs. Types I and II collagen fibers have presented, respectively, a proportion of 31.89% and 3.9% in forelimbs and 34.05% and 1.78% in hindlimbs. According to the used methodology, digital cushions had a clear differentiation relative to adipose tissue between fore and hindlimbs.

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Section: Discussionmentioning

confidence: 99%

Morphoquantitative description of bovine digital cushion

et al. 2015

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“…Furthermore, the leading researchers in the field, in Australia, Europe and the United States, were contacted to obtain any other relevant grey literature evidence. The review article by Baldwin and Pollitt (2010) referred to data presented in a MSc thesis publicly available through the University of Queensland website (Baldwin, 2012). This prospective clinical study investigated venographic changes in 10 Standardbred horses with no known prior history of laminitis, no clinical lameness and normal foot conformation, in which laminitis was induced using the carbohydrate (oligofructose) overload model.…”

Section: Appraisal Application and Reflectionmentioning

confidence: 99%

In Horses With Chronic Laminitis, Do Venograms Compared to Plain Radiographs Give Greater Diagnostic or Prognostic Information?

Wylie

Pollitt

2017

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<p>There is no conclusive evidence available to guide recommendations as to whether venograms provide any greater diagnostic or prognostic information compared to the use of plain radiographs in horses with chronic laminitis. Further evidence is needed to better answer this PICO.</p><br /> <img src="https://www.veterinaryevidence.org/rcvskmod/icons/oa-icon.jpg" alt="Open Access" /> <img src="https://www.veterinaryevidence.org/rcvskmod/icons/pr-icon.jpg" alt="Peer Reviewed" />

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“…The study of VAN EPS & POLLITT (2004) demonstrated that cryotherapy prevents injury of the laminar tissue after laminitis induced experimentally. However, it is known that reduced blood flow detected by venography, occur in chronical laminitis phase (BALDWIN & POLLITT, 2010).…”

Section: Ischemic Mechanismsmentioning

confidence: 99%