Title:
The un-permeating type radio frequency hydraulic fluid level detection system which uses phase detection
Document Type and Number:
Japanese Patent JP6081932
Kind Code:
B2
Abstract:
A medical fluid system includes a medical fluid pump; a container holding a fluid to be pumped by the medical fluid pump, the fluid at a first time having a first conductivity, the fluid at a second time having a second conductivity; and a radio frequency level sensor positioned in operable relation with the container, the radio frequency level sensor (i) configured to provide an output indicative of a level of the fluid in the container based upon sensing an impedance and (ii) connected to tuning circuitry that minimizes a reactance of the impedance such that the output is at least substantially independent of whether the fluid has the first conductivity or the second conductivity. The medical fluid system can determine the level of the fluid by measuring a resistance, the impedance, or a phase shift seen by the sensor.
Inventors:
Chen, Ye
Din, Yuan Pan Samuel
Muller, matthew
Najudeni, ghat
Titus, Joel
Din, Yuan Pan Samuel
Muller, matthew
Najudeni, ghat
Titus, Joel
Application Number:
JP2013557768A
Publication Date:
February 15, 2017
Filing Date:
March 02, 2012
Export Citation:
Assignee:
BAXTER INTERNATIONAL INCORP0RATED
Baxter Healthcare SA
Baxter Healthcare SA
International Classes:
G01F23/26; A61M1/14; A61M1/28; G01R27/02
Domestic Patent References:
| JP2001009028A | ||||
| JP4168325A | ||||
| JP63158423A |
Foreign References:
| US20100295565 | ||||
| DE19935743A1 | ||||
| US4359902 | ||||
| US5811677 | ||||
| US5841028 | ||||
| US7145349 | ||||
| US5609059 | ||||
| US4676101 | ||||
| US20090275855 | ||||
| US20100312174 | ||||
| US20080105048 | ||||
| US20040119637 |
Attorney, Agent or Firm:
Hidesaku Yamamoto
Natsuki Morishita
Natsuki Morishita
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