Pressure measurement unit, diaphragm chamber, and blood circuit
AssigneeNipro Corporation
InventorsTakeshi YAMAGUCHI, Minami YAMAGATA KAWABE
Life of this patent
Estimating the term…
Abstract
A pressure measurement unit includes: a drip chamber having a chamber space, a first port (inlet port), a fourth port (outlet port), and a second port (pressure measurement port); a first line having a tubular shape and having one end connected to the second port; a diaphragm chamber having a first air chamber in communication with the other end of the first line, a flexible membrane, and a second air chamber; and a second line having a tubular shape and having one end connected to the second air chamber and the other end connected to a pressure measurement device.
Claims11
A pressure measurement unit provided between a liquid circuit and a pressure measurement device, the pressure measurement unit comprising:
- a drip chamber having a chamber space, an inlet port configured to introduce a liquid flowing in the liquid circuit into the chamber space, an outlet port configured to send out the liquid in the chamber space to the liquid circuit, and a pressure measurement port in communication with an upper portion of the chamber space;
- a first line having a tubular shape and having one end connected to the pressure measurement port;
- and
- a diaphragm chamber having a first air chamber in communication with another end of the first line, a flexible membrane in contact with the first air chamber, and a second air chamber separated from the first air chamber by the flexible membrane.
A pressure measurement unit provided between a liquid circuit and a pressure measurement device, the pressure measurement unit comprising:
- a first line having a tubular shape and branched from the liquid circuit;
- and
- a diaphragm chamber having a first air chamber in communication with the first line, a flexible membrane in contact with the first air chamber, and a second air chamber separated from the first air chamber by the flexible membrane, wherein
- between the first line and a housing of the diaphragm chamber, a joint tube that is more flexible than the housing of the diaphragm chamber is provided.
A diaphragm chamber, for a pressure measurement unit, provided between a liquid circuit and a pressure measurement device and connected to a first line branched from the liquid circuit, the diaphragm chamber comprising:
- a first air chamber in communication with the first line;
- a flexible membrane in contact with the first air chamber;
- a second air chamber separated from the first air chamber by the flexible membrane;
- and a first air chamber port in communication with the first air chamber, wherein
- a direction of deformation of the flexible membrane due to differential pressure change between the first air chamber and the second air chamber and a flowing direction of a fluid in the first air chamber port cross each other.
Dependencies are inferred from the claim text.