Infusion Reminder / Medical equipment design

Infusion reminder is a product which is able to produce a warning sound to remind people to replace the infusion bag/bottle or stop infusion to prevent blood returning back to the intravenous tube which causes unnecessary harm to the patient when doing the intravenous injection. Infusion reminder’s core working principle is Hooke law. When injection in the infusion bag/bottle is about to run out, spring inside restores into certain length and close the switch to complete the circuit among the buzzer, the button battery and the simple integrated circuit inside the infusion reminder and then infusion reminder produce a warning sound.