US 11,730,460 B2
Therapeutic substance delivery device and therapeutic substance delivery kit
Masanori Maeda, Tokyo (JP); Nobuo Kanai, Tokyo (JP); Yusuke Fujii, Tokyo (JP); Masayuki Yamato, Tokyo (JP); and Makoto Abe, Tokyo (JP)
Assigned to TOKYO WOMEN'S MEDICAL UNIVERSITY, Tokyo (JP)
Appl. No. 15/757,765
Filed by TOKYO WOMEN'S MEDICAL UNIVERSITY, Tokyo (JP)
PCT Filed Sep. 8, 2016, PCT No. PCT/JP2016/076511
§ 371(c)(1), (2) Date Mar. 6, 2018,
PCT Pub. No. WO2017/043600, PCT Pub. Date Mar. 16, 2017.
Claims priority of application No. 2015-177993 (JP), filed on Sep. 9, 2015.
Prior Publication US 2020/0352550 A1, Nov. 12, 2020
Int. Cl. A61B 17/00 (2006.01)
CPC A61B 17/00234 (2013.01) [A61B 2017/00296 (2013.01); A61B 2017/00305 (2013.01); A61B 2017/00969 (2013.01); A61B 2217/005 (2013.01); A61B 2217/007 (2013.01)] 18 Claims
OG exemplary drawing
 
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.