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09:13, 4 July 2018 {{Authors
|author1=[[User:Mikael Häggström|Mikael Häggström]]
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[[File:Central venous catheter with a fibrin sheath.jpg|thumb|The fibrin sheath is indirectly seen in these images before and after radiocontrast infusion, as the radiocontrast collects around the catheter.]]
Fibrin sheaths of central venous catheters can be suspected when it is possible to infuse into it but not to aspirate.
==Technique==
Fibrin sheaths are usually detected by fluoroscopic catheter contrast angiography.<ref name="KnutstadHager2016">{{cite journal|last1=Knutstad|first1=K.|last2=Hager|first2=B.|last3=Hauser|first3=M.|title=Radiologic diagnosis and management of complications related to central venous access|journal=Acta Radiologica|volume=44|issue=5|year=2016|pages=508–516|issn=0284-1851|doi=10.1080/j.1600-0455.2003.00115.x}}</ref> Non-ionic contrastwith a high iodine concentration (for example 300 mg/ml) is injected by hand using a 20-ml syringe. A precontrast view is followed by a series of images with at 2–4 images/s and small field-of-view.<ref name="KnutstadHager2016"/>
==References==
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