{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,9,8]],"date-time":"2024-09-08T12:19:55Z","timestamp":1725797995320},"reference-count":36,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2006,5,23]],"date-time":"2006-05-23T00:00:00Z","timestamp":1148342400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Veterinary Medicine Series A"],"published-print":{"date-parts":[[2006,6]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>Chronic indwelling central vessel catheters provide vascular access for compartmental infusion or sampling. However, complications with catheter patency during the postoperative and\/or experimental period often arise. In order to identify physiological occurrences common with such complications, 10 multicatheterized sheep (61.8\u2003\u00b1\u20037.8\u2003kg BW), obtained from a previous nutrient flux study were used for gross and histopathological investigation. Catheters had been surgically placed in a hepatic portal vein (PVC), a hepatic vein (HVC), a distal mesenteric vein (MVC) and a mesenteric artery (MAC). In the previous study, catheters (PVC, HVC and MAC) were used to collect blood samples or infuse (MVC)<jats:italic>p<\/jats:italic>\u2010aminohippurate. Catheters were maintained for a total of 58\u2003days prior to necropsy. Histopathological findings indicated that catheter failures were associated with the following tissue responses: (i) thromboses with frequent focal vasculitis; (ii) euplastic tissues associated with extensive fibrosis; (iii) granulomas; (iv) neo\u2010vascularization of the media; (v) calcification processes; and (vi) micro\u2010abscesses. Additional studies are needed that address and incorporate improvement of catheter design and placement to minimize irritation of endothelium, improvement of catheter treatments and therapeutic regimes, and development and use of alternative anti\u2010coagulants. A greater understanding of the mechanisms leading to failure will help researchers improve catheter performance and patency.<\/jats:p>","DOI":"10.1111\/j.1439-0442.2006.00824.x","type":"journal-article","created":{"date-parts":[[2006,5,23]],"date-time":"2006-05-23T14:46:28Z","timestamp":1148395588000},"page":"230-238","source":"Crossref","is-referenced-by-count":3,"title":["Gross and Histopathological Observations of Long\u2010term Catheterized Vessels in Experimental Sheep"],"prefix":"10.1111","volume":"53","author":[{"given":"M. L.","family":"Barraza","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. 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