I believe the answer you are looking for is the excretory system.
The nurse before administering the medication should first wash hands then wear gloves. Shake dropper and remove cap and make sure that her fingers do not touch the tip of the dropper, this will prevent cross-contamination. Next the nurse will tilt the child's head to one side and instill the drops. The last step will be to wait at least 3-5 minutes.
I hope this helps.
Sociology that might be wrong thought , sorry