The bladder is the organ that stores urine until it leaves the body.
You could probably buy a tester <span />
Make sure you soak in cold water. If you put it in warm or hot water, you could grow bacteria in the food. Same goes for microwaving.
Your first action in managing this patient should be TO PERFORM A JAW THRUST. The jaw thrust is a first aid strategy that is usually perform on trauma patients in order to prevent the tongue from blocking the upper airways. The jaw thrust should be perform when the patient is in a supine position.