Andreas Geipel;Florian Kuhni;Ulrich Haueter;Christoph Huwiler
发明人:
Andreas Geipel,Florian Kuhni,Christoph Huwiler,Ulrich Haueter
申请号：
US12725819
公开号：
US08313468B2
申请日:
2010.03.17
申请国别(地区):
US
年份:
2012
代理人:
摘要：
Cannula assemblies with pressure sensors made of stacked coplanar layers and ambulatory infusion systems comprising the same are disclosed. The cannula assemblies include a hub and an infusion cannula. The hub includes a pressure sensor and a fluid channel fluidly coupled to the infusion cannula. The pressure sensor is formed from a stack of coplanar layers including a top layer, a base layer an electrode layer and a counter electrode layer. The fluid channel is positioned between the top layer and the base layer. The electrode layer is positioned between the top layer and the base layer and coupled to the fluid channel. The counter-electrode layer is positioned between the top layer and the electrode layer. A spacer layer having a through cut-out defining an electrode cavity is disposed between the top layer and the base layer such that the electrode layer extends across the electrode cavity.
