Final answer:
A Percutaneous Endoscopic Gastrostomy (PEG) Tube is a medical device for providing nutrition and medicine to patients unable to swallow, through direct placement into the stomach using an endoscope.
Step-by-step explanation:
A Percutaneous Endoscopic Gastrostomy (PEG) Tube is used for the purpose of feeding and administering medications to patients who cannot swallow or take in food by mouth. This medical device facilitates enteric administration of nutrition and medications directly into the stomach, bypassing the need for oral intake, which is especially useful for individuals with conditions that impair swallowing or when a patient is comatose. The procedure for inserting a PEG tube involves the use of an endoscope, which is passed through the patient's mouth and into the stomach allowing the healthcare provider to place the feeding tube with the aid of visual guidance.