FLOW CONTROL FOR INTRAVENOUS SOLUTIONS

摘要

Intravenous administration apparatus comprises a chamber (10), an inlet (41) to the chamber provided with a first valve (16), an outlet from the chamber provided with a second valve (17), a first liquid level sensor (181) disposed to detect a first liquid level in the chamber, a second liquid level sensor (191) disposed to detect a second liquid level in the chamber being a level higher than the first liquid level, and control means operative in use when an intravenous solution is supplied under pressure to the inlet to perform a cycle including opening the first valve to commence filing of the chamber with the solution, closing the first valve on the solution reaching the second level, opening the second valve whereby to allow the solution to pass out of the outlet under gravity, and closing the second valve on the solution falling to the first level.