发明授权
- 专利标题: Tracking and controlling fluid delivery from chamber
- 专利标题(中): 跟踪和控制从腔室输送液体
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申请号: US13487000申请日: 2012-06-01
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公开(公告)号: US09222819B2公开(公告)日: 2015-12-29
- 发明人: Christian A. Gutierrez , Ellis Meng
- 申请人: Christian A. Gutierrez , Ellis Meng
- 申请人地址: US CA Los Angeles
- 专利权人: UNIVERSITY OF SOUTHERN CALIFORNIA
- 当前专利权人: UNIVERSITY OF SOUTHERN CALIFORNIA
- 当前专利权人地址: US CA Los Angeles
- 代理机构: McDermott Will & Emery LLP
- 主分类号: G01F3/22
- IPC分类号: G01F3/22 ; B67D1/04 ; B67D1/08 ; G01F3/20 ; G01F11/08 ; G01M3/16 ; G01M3/40
摘要:
Electrochemical impedance may be used for accurate and real-time tracking and control of fluid delivery from fluid-filled chambers, such as from drug delivery devices. At least two measurement electrodes may be placed within the chamber in contact with the fluid to be sensed. Application of a small alternating current using these electrodes through the fluid/drug may allow measurement of electrochemical impedance. Volumetric changes of the compressible chamber due to movement of at least one surface within the compressible chamber (such as an actuating bellows or flexible diaphragm), may induce changes in the measured electrochemical impedance. Measuring these changes may allow for tracking of ejected liquid volumes from the compressible chamber. By taking the time-derivative of this signal, the rate of volume change can be tracked and therefore the rate of ejected fluid (flow rate) can be deduced.
公开/授权文献
- US20120234859A1 TRACKING AND CONTROLLING FLUID DELIVERY FROM CHAMBER 公开/授权日:2012-09-20