11. Check the tube is not kinked. Ensure luerlock cap has been
removed (used to block off the tube when required).
To check obvious reasons for nondrainage of tube initially.
12. Flush tube slowly with 5 ml of sterile water (saline can increase risk of deposits/stones). Disconnect syringe from tube and allow urine to run back into receptacle. Pulling back on syringe slowly may help dislodge a blockage but excess force can cause bleeding. Flushing again with 5 ml of water can be carried out if necessary.
To prevent damage to the kidney. To prevent excess bleeding.