Flushing apparatus for injection of hazardous medicinal liquid, and hazardous medicinal liquid injection apparatus

1. A flushing apparatus for injection of a hazardous medicinal liquid harmful to a human body when exposed to an ambient air, comprising:

a main body configured to connect a connection pipe for guiding the hazardous medicinal liquid and a patient connector for injecting the hazardous medicinal liquid into a patient, the main body configured to form a first flow path for guiding the hazardous medicinal liquid from the connection pipe to the patient connector, the main body including a flushing portion forming a second flow path connected to a predetermined connection point located between both ends of the first flow path and a flushing port to introduce a flushing liquid into the second flow path;

a flow rate reducer disposed at an upstream side of the connection point in the first flow path and configured to reduce a flow rate of the hazardous medicinal liquid flowing through the first flow path;

a flushing vent cap configured to be detachably coupled to the flushing portion and to discharge a gas while blocking a discharge of a priming liquid when the priming liquid flows in a direction toward the flushing port in the second flow path; and

a flushing valve unit configured to be coupled to the flushing portion and to be interchangeable with the flushing vent cap, the flushing valve unit including a surface that forms a hole configured to be opened when the flushing valve unit is pressed from an outside.

2. The flushing apparatus of claim 1 , wherein the main body includes an integrally-formed joint part, and

wherein the joint part forms a connection flow path, which is a portion of the first flow path, extending from a downstream end of the flow rate reducer to the connection point.

3. The flushing apparatus of claim 2 , wherein the main body includes a cover part which is coupled to the joint part and which accommodates the flow rate reducer together with the joint part.

4. The flushing apparatus of claim 2 , wherein the connection flow path is shorter than a downstream flow path portion, which is a portion of the first flow path, extending from the connection point to a downstream end of the first flow path.

5. The flushing apparatus of claim 1 , further comprising:

a backflow preventer configured to prevent the flushing liquid from flowing back toward the flushing port in the second flow path.

6. The flushing apparatus of claim 5 , wherein at least a portion of the backflow preventer is disposed at the connection point.

7. The flushing apparatus of claim 6 , wherein the backflow preventer includes a protrusion protruding from the second flow path into the first flow path, and a hole through which the flushing liquid is passed is formed at an end of the protrusion.

8. The flushing apparatus of claim 1 , wherein the main body includes a downstream portion that forms a portion of a downstream side of the connection point in the first flow path,

wherein the flushing apparatus further includes:

a replacement coupling portion disposed in the downstream portion and configured to be detachably coupled to the patient connector; and

a downstream vent cap configured to be detachably coupled to the replacement coupling portion by replacing the patient connector and to discharge a gas while blocking a charge of a priming liquid when the priming liquid flows along the downstream portion from the connection point in the first flow path.

9. A hazardous medicinal liquid injection apparatus for injecting a hazardous medicinal liquid harmful to a human body when exposed to an ambient air, comprising:

a pumping module configured to pressurize the hazardous medicinal liquid;

a connection pipe configured such that the hazardous medicinal liquid flowing out of the pumping module by pressurization in the pumping module flows through the connection pipe; and

a flushing apparatus configured to connect the connection pipe and a patient connector for injecting the hazardous medicinal liquid into a patient,

wherein the flushing apparatus includes:

a main body configured to form a first flow path for guiding the hazardous medicinal liquid from the connection pipe to the patient connector, the main body including a flushing portion forming a second flow path connected to a predetermined connection point located between both ends of the first flow path and a flushing port to introduce a flushing liquid into the second flow path;

a flow rate reducer disposed at an upstream side of the connection point of the second flow path in the first flow path and configured to reduce a flow rate of the hazardous medicinal liquid flowing through the first flow path;

and a flushing vent cap configured to be detachably coupled to the flushing portion and discharge a gas while blocking a discharge of a priming liquid when the priming liquid flows in a direction toward the flushing port in the second flow path; and

a flushing valve unit configured to be coupled to the flushing portion and to be interchangeable with the flushing vent cap, the flushing valve unit including a surface that forms a hole configured to be opened when the flushing valve unit is pressed from an outside.

10. The hazardous medicinal liquid injection apparatus of claim 9 , wherein the main body includes an integrally-formed joint part, and

wherein the joint part forms a connection flow path, which is a portion of the first flow path, extending from a downstream end of the flow rate reducer to the connection point.

11. The hazardous medicinal liquid injection apparatus of claim 9 , wherein the pumping module includes a chamber configured to accommodate the hazardous medicinal liquid,

wherein the hazardous medicinal liquid injection apparatus further comprises a port module connected to the connection pipe or the chamber and configured to fill a liquid into the chamber.