Vertical Indwelling Needle Assembly and Base Structure Thereof

A base structure of a vertical indwelling needle assembly, comprising:

• a base body used for detachably connecting to a connector of the vertical indwelling needle assembly, wherein an interior of the base body is provided with an infusion chamber, a straight channel and an infusion channel;
• the infusion chamber is mounted proximal to a top of the base body;
• a bottom of the base body is provided with a flexible indwelling infusion needle mounted vertically to a bottom surface of the base body;
• a top of the straight channel is in communication with the infusion chamber;
• a bottom of the straight channel is coaxially in communication with a starting end of the flexible indwelling infusion needle;
• an upper chamber opening of the infusion chamber is provided with a first flexible sealing member for sealing the upper chamber opening;
• the first flexible sealing member is used to allow a penetration of a puncture needle of an insertion device, so as to allow the puncture needle to pass through the infusion chamber and the straight channel and to extend out of an end of the flexible indwelling infusion needle;
• the infusion channel comprises a transverse channel and a connecting channel both formed in the base body;
• the transverse channel is provided proximal to a bottom of the base body;
• the connecting channel is used to communicate the infusion chamber with the transverse channel;
• the transverse channel extends transversely to an exterior surface of the base body to form an external opening;
• an interior of the transverse channel is provided with a second flexible sealing member;
• the second flexible sealing member is provided between a connecting opening and the external opening, wherein the connecting opening is positioned on the transverse channel correspondingly communicating with the connecting channel;
• and the infusion needle of the connector penetrates the second flexible sealing member from the external opening and is in communication with an interior of the transverse channel when the connector is assembled in place with the base body.