Title:
血管アクセスブラッド流量の経皮的測定用センサ
Document Type and Number:
Japanese Patent JP2005538752
Kind Code:
A
Abstract:
An optical sensor includes a sensing pair of complementary emitter and detector elements for measuring the bulk absorptivity (alpha) of an area parallel to and including a hemodialysis access site, and a normalizing pair of complementary emitter and detector elements for measuring the absorptivity (alphao) of the tissue itself perpendicular to the access site. The pairs of emitter and detector elements define two lines at right angles to each other, and one of the pairs lies to one side of the line defined by the other of the pairs, such that the two pairs of emitter and detector elements form a "T" shape. Indicator dilution techniques are used to measure vascular access flow rates during routine hemodialysis, using the sensor.
Inventors:
Mirror david are
Bell David A
Cox douglas ell
Tsang Biao
Bell David A
Cox douglas ell
Tsang Biao
Application Number:
JP2003577730A
Publication Date:
December 22, 2005
Filing Date:
March 19, 2003
Export Citation:
Assignee:
Mirror david are
Bell David A
Cox douglas ell
Tsang Biao
Hema Metrics Incorporated
Bell David A
Cox douglas ell
Tsang Biao
Hema Metrics Incorporated
International Classes:
G01N21/35; A61B5/00; A61B5/026; A61B5/0275; A61B5/145; A61B5/1455; A61M1/14; A61M1/36; (IPC1-7): A61B5/145; A61M1/14; G01N21/35
Attorney, Agent or Firm:
Sadao Kumakura
Fumiaki Otsuka
Shishido Kaichi
Village shrine Atsuo
Disciple Maru Ken
Ino Sato
Fumiaki Otsuka
Shishido Kaichi
Village shrine Atsuo
Disciple Maru Ken
Ino Sato