Connection structure and liquid medicine administration tool

A liquid medicine administration tool comprising:

• a medical container including a liquid medicine containing part that contains a liquid medicine and a liquid medicine discharge part through which the liquid medicine is discharged, the liquid medicine discharge part extending in an extending direction;
• and
• a connection structure connected to the liquid medicine discharge part, the connection structure including:
• a sealing member including a mounting part mounted to the medical container and covering an outside of the liquid medicine discharge part, an opening formed in the mounting part in an extending direction of the liquid medicine discharge part, and an elastic sealing body disposed in a space between the opening and the liquid medicine discharge part and sealing the liquid medicine discharge part;
• a connector mountable to the sealing member and including a connection needle that punctures the elastic sealing body when the connector is mounted to the sealing member, and a needle hub that holds the connection needle;
• the connector including a push-in structure that compresses the elastic sealing body when the connector is mounted to the sealing member while the mounting part is mounted to the medical container and the connection needle punctures the elastic sealing body;
• and
• the push-in structure compresses the elastic sealing body in a range of a compression ratio B/A of 70% to 95% when the connector is mounted to the sealing member and when the connection needle punctures the elastic sealing body, wherein A is a volume of the elastic sealing body before puncturing with the connection needle is A and a volume of the elastic sealing body after puncturing with the connection needle is B.

A method comprising:

• mounting a connector onto a sealing member that is mounted on a liquid medicine discharge part of a medical container, the medical container also including a liquid medicine containing part having an interior that contains a liquid medicine, the liquid medicine discharge part being at a distal end of the liquid medicine containing part,
• the sealing member including:
• a mounting part that is mounted to the liquid medicine discharge part in covering relation to an outside of the liquid medicine discharge part;
• an opening at a distal end part of the mounting part, and an elastic sealing body positioned in a space between the opening and the liquid medicine discharge part to seal the liquid medicine discharge part;
• the connector including a needle hub and a connection needle in which is located a flow path, the connection needle being connected to and extending away from the needle hub;
• the mounting of the connector onto the sealing member including puncturing the elastic sealing body with the connection needle so the flow path in the connection needle is in communication with the interior of the liquid medicine containing part to permit the liquid in the interior of the liquid medicine containing part to flow into the flow path and be discharged from the interior of the liquid medicine containing part;
• and
• the mounting of the connector onto the sealing member resulting in the elastic sealing body being compressed in a range of a compression ratio B/A of 70% to 95%, wherein A is a volume of the elastic sealing body before puncturing with the connection needle and B is a volume of the elastic sealing body after puncturing with the connection needle.