I was recently asked by consultant anaesthetist to take down the transducer monitoring and cap off an art line which could still used for bloods at a later point.I had no questions regards this as I had seen art lines capped and used for repeat Abgs at a later point.The area to which the patient was being discharged flagged the incident and was told this should never be the case.first off I was doing what I was told and secondly had as I say seen similar practise before,be it in a different area.I'm aware now that this is not best practise but was only going on previous experience.