A 'cystocentesis' is a way in which a veterinarian can collect a urine sample. In a cystocentesis, a fine needle attached to a syringe is inserted into the bladder through the abdomen. Urine is drawn into the syringe and the needle is removed. This does not hurt the animal; if the animal demonstrates any objection to a cystocentesis, it is usually because the animal needs to be placed on his back during the procedure.