US 9,808,583 B2
Percutaneous medication device and needle formation used for the device
Akinori Inou, Yoshida-cho (JP); Akihiro Shinoda, Yoshida-cho (JP); and Kouichi Otsuka, Yoshida-cho (JP)
Assigned to Nanbu Plastics Co., Ltd., Shizuoka (JP)
Appl. No. 13/817,039
Filed by Akinori Inou, Yoshida-cho (JP); Akihiro Shinoda, Yoshida-cho (JP); and Kouichi Otsuka, Yoshida-cho (JP)
PCT Filed Aug. 19, 2011, PCT No. PCT/JP2011/004640
§ 371(c)(1), (2), (4) Date Mar. 28, 2013,
PCT Pub. No. WO2012/026100, PCT Pub. Date Mar. 1, 2012.
Claims priority of application No. 2010-186653 (JP), filed on Aug. 23, 2010.
Prior Publication US 2013/0184648 A1, Jul. 18, 2013
Int. Cl. A61M 5/32 (2006.01); A61M 5/34 (2006.01); A61M 5/00 (2006.01)
CPC A61M 5/3202 (2013.01) [A61M 5/3287 (2013.01); A61M 5/343 (2013.01); A61M 5/349 (2013.01); A61M 5/002 (2013.01); A61M 5/3298 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A percutaneous medication device, comprising:
a syringe to be filled with medical fluid, the syringe including a syringe body with a leading-end through which the medical fluid is dispensed and a movable plunger provided within the syringe body for dispensing the medical fluid; and
a needle formation attached to the leading-end of the syringe body,
wherein the needle formation comprises a needle formation body having a leading-end surface, a needle projecting from the leading-end surface of the needle formation body, a cover portion covering a leading-end of the needle formation body, and a fixation member configured to fix the needle to the needle formation body,
wherein the needle is inserted into a through-hole formed at the leading-end of the needle formation body and the needle is fixed to the needle formation body by the fixation member,
wherein the cover portion comprises a monolithically formed structure that includes (i) a leading-end wall located at a leading-end of the cover portion and having a leading-end wall surface that faces the leading-end surface of the needle formation body, (ii) one or more sidewalls projecting from an outer perimeter of the leading-end wall in a longitudinal direction, and (iii) a step portion projecting beyond the leading-end wall surface of the leading-end wall in the same longitudinal direction as the one or more sidewalls,
wherein when the leading-end surface of the needle formation body abuts to the step portion to form a space between the leading-end surface of the leading-end wall of the cover portion and the leading-end surface of the needle formation body, at least a portion of the needle projects out of the cover portion through a needle insertion hole formed in the leading-end wall of the cover portion, at least a portion of the fixation member is disposed on the leading-end surface of the needle formation body and is exposed to the space formed between the leading-end surface of the leading-end wall of the cover portion and the leading-end surface of the needle formation body, and the fixation member does not protrude beyond the leading-end surface of the leading-end wall of the cover portion, and
wherein the needle formation, which comprises the needle formation body, the needle, the cover portion, and the fixation member, is removably attachable to the leading-end of the syringe body as a single assembled unit to enable attachment of the needle formation to the leading-end of the syringe body prior to dispensing the medical fluid.