Blood circulation system
Inventors
NIIMI, Yoshinari • Tanaka, Katsunori • Kihara, Masahiro • KISHI, Munehiro • MARUYA, Taku • Yoshihara, Masanori • Kamiya, Masahiro
Assignees
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Publication Number
US-10786617-B2
Publication Date
2020-09-29
Expiration Date
Abstract
The preset invention discloses an artificial heart and lung apparatus (100) including a roller pump (120); a blood removal line (101); a first blood transfer line (104); a blood removal rate sensor (111) and a control unit (140) that performs linked control of the roller pump (120) in correspondence with a blood removal rate. The control unit (140) is capable of detecting that the blood removal rate deviates from a blood removal condition set in advance, and out-of-set condition blood removal is performed.
Core Innovation
The invention relates to a blood circulation system configured to be connected to a human body and to transfer removed blood to the human body via a blood transfer pump. The system includes a blood removal line through which removed blood flows to the blood transfer pump, a blood transfer line that transfers blood from the blood transfer pump to the human body, a blood removal rate sensor that measures a blood removal rate in the blood removal line, and a control unit that controls a blood transfer rate of the blood transfer pump.
The control unit receives a blood removal rate signal input receiving unit and set blood removal condition data receiving unit, where set blood removal condition data includes a set upper limit blood removal rate and a set lower limit blood removal rate. The control unit detects that the blood removal rate is greater than the set upper limit blood removal rate or is less than the set lower limit blood removal rate, and performs out-of-set condition blood removal.
The control unit performs linked control of the blood transfer pump in correspondence with the blood removal rate so that the blood transfer rate is in a specific range of the blood removal rate measured by the sensor. When linked control is performed and the blood removal rate is detected to exceed the set upper limit blood removal rate, the control unit performs control such that the blood transfer rate of the blood transfer pump is limited to an upper limit value of the blood transfer rate or less while being independent of the blood removal rate.
Claims Coverage
The document includes one independent claim. It defines a linked control relationship between measured blood removal rate and blood transfer pump rate, with out-of-set condition detection using set upper and lower blood removal limits, and a limiting behavior when the measured blood removal rate exceeds the set upper limit, including independence from the blood removal rate.
Linked control of pump transfer rate with measured blood removal rate
The control unit performs linked control of the blood transfer pump in correspondence with the blood removal rate such that the blood transfer rate of the blood transfer pump is in a specific range of the blood removal rate measured by the blood removal rate sensor.
Out-of-set condition detection using set upper and lower removal limits
The control unit detects that the blood removal rate is greater than the set upper limit blood removal rate or is less than the set lower limit blood removal rate, and out-of-set condition blood removal is performed.
Upper-limit limiting of transfer rate independent of the blood removal rate upon exceeding removal upper limit
When the linked control is performed and when the blood removal rate is detected to exceed the set upper limit blood removal rate, the control unit limits the blood transfer rate of the blood transfer pump to the upper limit value of the blood transfer rate or less while being independent of the blood removal rate.
Across the independent claim, the central coverage is a blood circulation system with linked control of transfer rate relative to measured removal rate, out-of-set condition detection by set upper and lower limits, and limiting of transfer rate to an upper limit value or less when the removal rate exceeds the set upper limit.
Stated Advantages
Performs linked control of the blood transfer pump in correspondence with the blood removal rate so that the blood transfer rate is in a specific range of the blood removal rate measured by the blood removal rate sensor.
Performs out-of-set condition blood removal when the blood removal rate is greater than the set upper limit blood removal rate or is less than the set lower limit blood removal rate.
Limits the blood transfer rate of the blood transfer pump to an upper limit value of the blood transfer rate or less when the blood removal rate exceeds the set upper limit blood removal rate while being independent of the blood removal rate.
Provides out-of-condition display/alarm during an out-of-set condition.
Automatically returns blood transfer via the blood transfer pump to the linked control when the out-of-set condition is deactivated.
Documented Applications
Blood circulation system for an artificial heart and lung apparatus connected to a human body that transfers removed blood to the human body using a blood transfer pump under normal control and linked control, including out-of-set condition blood removal based on measured blood removal rate.
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