公开(公告)号：US20220370732A1

公开(公告)日：2022-11-24

申请号：US17747330

申请日：2022-05-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Katsuhisa HIGASHIYAMA ,  Tatsuya NAMATSU ,  Keisei SOWA ,  Koji TANAKA ,  Takumi ONO

IPC: A61M5/42 ,  A61M25/01

Abstract: A catheter assembly is provided that includes a puncture tool and a catheter. The puncture tool includes a hollow puncture needle configured to puncture a blood vessel, a detection portion that protrudes forward from a tip of the puncture needle and detects pulsation of the blood vessel, and a determination portion that determines whether the blood vessel is a vein or an artery based on the pulsation of the blood vessel detected by the detection portion. The detection portion includes a probe provided inside the hollow puncture needle that is configured to advance and retreat in an axial direction, and a sensor that detects pulsation of a blood vessel transmitted via the probe.

公开(公告)号：US20230100101A1

公开(公告)日：2023-03-30

申请号：US18073603

申请日：2022-12-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keisei SOWA

IPC: G01N27/30 ,  G01N27/333

Abstract: A reference electrode for electrochemical measurement includes a substrate, an electrode portion on the substrate, and an ion-sensitive film covering the electrode portion and including an inorganic salt and an organic substance. The electrode portion and the inorganic salt include an anion of the same element. In a top view of the electrode portion, the maximum shortest distance from any point in the electrode portion to the outer perimeter of the electrode portion is about 0.3 mm or less.