Recent comparison of catheters makes unsubstantiated conclusions.
Ring
W H
WH
D002406:Catheterization, Peripheral / Q000009:adverse effects*; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D011092:Polyethylene Glycols; D011138:Polytetrafluoroethylene; D012826:Silicone Elastomers
D012826:Silicone Elastomers; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D011092:Polyethylene Glycols; D011138:Polytetrafluoroethylene