A study will be carried out to observe catheters (polyurethane tubes inserted into veins) over a period of five years. The study will look at any problems related to these devices, especially those put in at a specific hospital unit (vascular interventional radiology service) of the Arnau de Vilanova hospital in Lleida (Catalonia, Spain).
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Incidence of complications that result in the malfunction of venous catheters cannulated using the ultrasound-guided technique in an interventional vascular radiology unit, necessitating their removal or replacement.
Timeframe: From date of study entry (day of catheter insertion) to the day of withdrawal from any cause, evaluated up to 111 weeks.