Therapeutic substance delivery device and therapeutic substance delivery kit

1. A therapeutic substance conveying device for conveying and/or applying a therapeutic substance to a desired site in a biological tract, comprising:

a therapeutic substance-carrying unit,

a connector connected to the therapeutic substance-carrying unit, and

an air supply/discharge tube connected to the connector,

wherein

the therapeutic substance-carrying unit has a body portion in which a recess is formed, an elastic membrane covering at least the recess and forming an inner space with the body portion, and a connecting tube of which at least one end is made of a flexible material, and which communicates with the inner space,

the at least one end of the connecting tube does not have an external thread structure,

the connector comprises a coupling body with a through-hole through which fluid passes and having one end for insertion into the connecting tube and the other end connected to the air supply/discharge tube, a flange section anchored to the other end of the coupling body and an anchoring nut through which the coupling body is inserted,

the coupling body comprises a tube catch section having a larger diameter than the outer diameter of the coupling body and a smaller diameter than the inner diameter of the anchoring nut, and

at least a portion of the inner wall of the anchoring nut is provided with an internal thread, forward screwing of the anchoring nut causes the internal thread to bite into the connecting tube sandwiched between the anchoring nut and the coupling body, thereby retaining an internal thread imprint on the connecting tube, and the therapeutic substance-carrying unit is detachable,

wherein the tube catch section lacks an external thread structure,

wherein the air supply/discharge tube is inserted through the forceps channel of an endoscope and is used together with the endoscope, wherein the connector has a smaller diameter than the diameter of the forceps channel.

2. The therapeutic substance conveying device according to claim 1 , wherein

the anchoring nut comprises a tubular screw part and a collar section having an insertion hole through which the coupling body is inserted, and

the diameter of the insertion hole is a smaller diameter than the outer diameter of the tube catch section.

3. The therapeutic substance conveying device according to claim 2 , wherein the outer diameter of the flange section is a smaller diameter than the outer diameter of the anchoring nut and a larger diameter than the diameter of the insertion hole of the collar section.

4. The therapeutic substance conveying device according to claim 1 , wherein the outer diameter of the connector is less than 5.0 mm.

5. The therapeutic substance conveying device according to claim 1 , wherein the tube catch section is formed in a tapered manner with increasing diameter from one end of the coupling body toward the other end.

6. The therapeutic substance conveying device according to claim 1 , wherein an inflation means for causing inflow and discharge of fluid in the inner space of the therapeutic substance-carrying unit is also connected to the air supply/discharge tube, wherein the inflation means is a syringe or a pump.

7. The therapeutic substance conveying device according to claim 1 , wherein the therapeutic substance-carrying unit is for single-use.

8. The therapeutic substance conveying device according to claim 1 , wherein the body portion of the therapeutic substance-carrying unit is an approximately half-elliptical tube shape with a portion of the peripheral surface removed.

9. The therapeutic substance conveying device according to claim 1 , wherein

the therapeutic substance-carrying unit comprises a body portion having at least a recess-formed middle section between one end and the other end, and

the elastic membrane is formed as a tube with two ends, the one end and the other end of the elastic membrane being in close contact with and anchored to the middle section, while being wrapped around the perimeter of the middle section.

10. The therapeutic substance conveying device according to claim 1 , wherein

the body portion of the therapeutic substance-carrying unit has an approximately half-egg shape in which a recess has been formed, and

the elastic membrane is in close contact and anchored with the edge of the body portion.

11. The therapeutic substance conveying device according to claim 1 , wherein the body portion has black or dark coloration.

12. A therapeutic substance conveying kit for use of the therapeutic substance conveying device as defined in claim 1 , comprising:

a therapeutic substance-carrying unit,

a connector to be connected to the therapeutic substance-carrying unit, and

an air supply/discharge tube to be connected to the connector,

wherein

the therapeutic substance-carrying unit has a body portion in which a recess is formed, an elastic membrane covering at least the recess and forming an inner space with the body portion, and a connecting tube of which at least one end is made of a flexible material, and which communicates with the inner space,

the at least one end of the connecting tube does not have an external thread structure,

the connector comprises a coupling body with a through-hole through which fluid passes and having one end for insertion into the connecting tube and the other end connected to the air supply/discharge tube, a flange section anchored to the other end of the coupling body and an anchoring nut through which the coupling body is inserted,

the coupling body comprises a tube catch section having a larger diameter than the outer diameter of the coupling body and a smaller diameter than the inner diameter of the anchoring nut, and

at least a portion of the inner wall of the anchoring nut is provided with an internal thread, forward screwing of the anchoring nut causes the internal thread to bite into the connecting tube sandwiched between the anchoring nut and the coupling body, thereby retaining an internal thread imprint on the connecting tube, and the therapeutic substance-carrying unit is detachable,

wherein the tube catch section lacks an external thread structure,

wherein the air supply/discharge tube is inserted through the forceps channel of an endoscope and the therapeutic substance conveying device is used together with the endoscope, wherein the connector has a smaller diameter than the diameter of the forceps channel.

13. The therapeutic substance conveying kit according to claim 12 , wherein an inflation means for causing inflow and discharge of fluid in the inner space of the therapeutic substance-carrying unit, connected with the air supply/discharge tube, is additionally provided, wherein the inflation means is a syringe or a pump.

14. The therapeutic substance conveying kit according to claim 12 , wherein a therapeutic substance is further carried on the therapeutic substance-carrying unit.

15. The therapeutic substance conveying kit according to claim 12 , wherein the connecting tube is made from a material suitable for medical use.

16. The therapeutic substance conveying kit according to claim 15 , wherein the connecting tube is made from polytetrafluoroethylene (PTFE) or silicone rubber.

17. The therapeutic substance conveying device according to claim 1 , wherein the connecting tube is made from a material suitable for medical use.

18. The therapeutic substance conveying device according to claim 17 , wherein the connecting tube is made from polytetrafluoroethylene (PTFE) or silicone rubber.