US 12,274,859 B2
Drug delivery device and manufacturing method thereof
So Hee Kim, Daegu (KR); Hyun Min Moon, Daegu (KR); and Nam Sun Chou, Seoul (KR)
Assigned to DAEGU GYEONGBUK INSTITUE OF SCIENCE AND TECHNOLOGY, Daegu (KR)
Appl. No. 16/763,872
Filed by DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY, Daegu (KR)
PCT Filed Nov. 12, 2018, PCT No. PCT/KR2018/013721
§ 371(c)(1), (2) Date May 13, 2020,
PCT Pub. No. WO2019/093842, PCT Pub. Date May 16, 2019.
Claims priority of application No. 10-2017-0150689 (KR), filed on Nov. 13, 2017.
Prior Publication US 2020/0353162 A1, Nov. 12, 2020
Int. Cl. A61M 5/142 (2006.01); A61B 5/24 (2021.01); A61M 5/14 (2006.01); B05D 1/00 (2006.01); B05D 3/14 (2006.01)
CPC A61M 5/14276 (2013.01) [A61B 5/24 (2021.01); A61M 5/1408 (2013.01); B05D 1/005 (2013.01); B05D 3/148 (2013.01); A61M 2205/0216 (2013.01); A61M 2205/054 (2013.01); A61M 2205/3327 (2013.01); A61M 2205/50 (2013.01); A61M 2207/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A drug delivery device comprising:
a substrate unit that is capable of being inserted into a human body and has a porous insertion portion having a plurality of discharge voids spaced apart from each other,
wherein the insertion portion is provided to be deformable to match a shape of a biological tissue, and while the insertion portion expands and contracts, a drug is injected into and discharged from the plurality of discharge voids of the insertion portion,
wherein the insertion portion is provided with a plurality of pores through which the drug is delivered, and the pores are distributed right on the plurality of discharge voids and only located on a first side wall of the insertion portion,
wherein the insertion portion is provided to deliver the drug from the plurality of discharge voids to the biological tissue through the pores in a state that the first side wall of the insertion portion is in close contact with the biological tissue, thus the drug discharged from each of the plurality of discharge voids is delivered to the biological tissue without mixing,
wherein the plurality of discharge voids are provided to allow drugs of the same type and concentration to be injected into the plural discharge voids, or drugs, of which one or both of type and concentration are different from each other, to be injected into the plurality of discharge voids.