HOSPITAL BED ON RENT IN CHENNAI A Semi-Fowler cot with mattress is a medical bed that elevates the patient's head and upper body to an angle of about 30-45 degrees to improve breathing, digestion, and comfort, making it useful in hospitals and home care for various conditions and activities like eating or reading. The adjustable feature, operated by cranks or motors, provides greater patient comfort and can be equipped with side railings and other safety features.