Medication mechanism

A dosing mechanism for dosing a patient with liquid medicine filled in a medicine vessel, comprising:

• a body;
• and a disposable portion that is removably attached to the body,
• wherein the disposable portion comprises:
• a pump that sucks the medicine from the medicine vessel and discharges the medicine to the patient;
• a suction-side tube that extends from the pump toward the medicine vessel;
• a discharge-side tube that extends from the pump toward the patient;
• and
• a connector that is located at a front end of at least one of the suction-side tube and the discharge-side tube, so as to be capable of being connected to a tube extending from the medicine vessel or the patient,
• wherein the body comprises a sensor in a position corresponding to the suction-side tube or the discharge-side tube attached to the body;
• and
• wherein the dosing mechanism further comprises:
• a relief pipe whose one end is connected to the suction-side tube while the other end is connected to the discharge-side tube, and
• a valve connected to the relief pipe, the valve comprising a first channel through which the medicine can pass without stopping is formed in parallel with a second channel which can be opened and closed “is amended as” a valve connected to the relief pipe, the valve comprising a first channel through which the medicine can pass without stopping is formed in parallel with a second channel through which the medicine can pass, wherein the second channel can be opened and closed.