Final answer:
Low intermittent suction is used to remove fluids or secretions, and healthcare providers should check for gastric residual during continuous feedings.
Step-by-step explanation:
The purpose of low intermittent suction (30-40mmHg) is to apply negative pressure to a specific area in the body in order to remove fluids or secretions.
In the context of continuous feedings, healthcare providers should check for gastric residual to monitor the amount of fluid remaining in the stomach before administering the next feeding.