title: Improved catheter patency by means of a simple check-valve mechanism.
mesh_terms: D000818:Animals; D002408:Catheters, Indwelling / Q000592:standards*; D004285:Dogs; D007263:Infusions, Parenteral / Q000295:instrumentation / Q000379:methods*; D011312:Pressure; D014682:Vena Cava, Inferior / Q000502:physiology