US 11,839,752 B2
Hemostasis valve-equipped indwelling needle and indwelling needle assembly
Hiroyuki Nakagami, Osaka (JP); and Shingo Sakamoto, Osaka (JP)
Assigned to NIPRO CORPORATION, Osaka (JP)
Appl. No. 16/635,219
Filed by NIPRO CORPORATION, Osaka (JP)
PCT Filed Aug. 2, 2018, PCT No. PCT/JP2018/029139
§ 371(c)(1), (2) Date Jan. 30, 2020,
PCT Pub. No. WO2019/027024, PCT Pub. Date Feb. 7, 2019.
Claims priority of application No. 2017-150204 (JP), filed on Aug. 2, 2017; and application No. 2017-216744 (JP), filed on Nov. 9, 2017.
Prior Publication US 2020/0254195 A1, Aug. 13, 2020
Int. Cl. A61M 5/38 (2006.01); A61M 39/06 (2006.01); A61M 39/26 (2006.01); A61M 5/165 (2006.01); A61M 5/158 (2006.01)
CPC A61M 5/385 (2013.01) [A61M 5/158 (2013.01); A61M 5/165 (2013.01); A61M 39/0693 (2013.01); A61M 39/26 (2013.01); A61M 2205/7536 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A hemostasis valve-equipped indwelling needle comprising:
a cannula provided on a distal end side thereof and configured to be percutaneously inserted into a blood vessel;
a link connector provided on a proximal end side thereof;
an internal flow path extending from the cannula to the link connector; and
a hemostasis valve disposed inside the link connector, wherein
the link connector includes an air vent passage that communicates with an external space via an air outlet port opening onto a circumferential wall thereof,
the internal flow path communicates with the external space further on a cannula side than the hemostasis valve via the air vent passage, and
a filter that allows gas to pass through but does not allow liquid to pass through is clasped directly by and compressed between opposing surfaces of a plurality of rigid members and disposed on the air vent passage.