Implantable device for recording intracranial pressures
First Claim
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1. Implantable device for determining intracranial pressures, comprising:
- a rigid housing defining a housing interior;
a thin biocompatible membrane closing off at least a portion of the housing interior; and
a pressure measuring device arranged in the housing interior, the pressure measuring device being a microchip which comprises a pressure sensor for determining a value of a pressure transfer occurring through the membrane from an outside of the membrane inwards towards the housing interior, wherein;
the value of the pressure transfer is telemetrically communicated via the pressure measuring device;
a pressure-dependent movement of the membrane acts on the pressure measuring device via a transfer medium,the transfer medium comprises one of air or a special gas,the housing interior is filled with a gas-displacing filler material except for a provided volume of the transfer medium,the rigid housing has a closed fluid chamber which adjoins the membrane on the outside of the membrane and is connected to a supply conduit for fluid,the rigid housing has the shape of a shallow can with an upper measurement chamber receiving the microchip and the transfer medium and a lower region forming the fluid chamber,the membrane divides the housing interior into the measurement chamber and the fluid chamber,the supply conduit for fluid runs substantially perpendicular in relation to a lower boundary wall of the fluid chamber.
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Accused Products
Abstract
To assure, in the case of an implantable device for determining intracranial pressures, the biocompatibility of the implant in the long term, wherein a pressure measuring device is used, which is operatively connected to a sensor for a telemetric measured value transfer, it is proposed that the pressure measuring device is a microchip, that the microchip is located in a rigid housing, and that the pressure transfer from the outside inwards occurs through a very thin biocompatible membrane, the pressure-dependent movement of which acts on the pressure measuring device via a transfer medium.
30 Citations
45 Claims
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1. Implantable device for determining intracranial pressures, comprising:
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a rigid housing defining a housing interior; a thin biocompatible membrane closing off at least a portion of the housing interior; and a pressure measuring device arranged in the housing interior, the pressure measuring device being a microchip which comprises a pressure sensor for determining a value of a pressure transfer occurring through the membrane from an outside of the membrane inwards towards the housing interior, wherein; the value of the pressure transfer is telemetrically communicated via the pressure measuring device; a pressure-dependent movement of the membrane acts on the pressure measuring device via a transfer medium, the transfer medium comprises one of air or a special gas, the housing interior is filled with a gas-displacing filler material except for a provided volume of the transfer medium, the rigid housing has a closed fluid chamber which adjoins the membrane on the outside of the membrane and is connected to a supply conduit for fluid, the rigid housing has the shape of a shallow can with an upper measurement chamber receiving the microchip and the transfer medium and a lower region forming the fluid chamber, the membrane divides the housing interior into the measurement chamber and the fluid chamber, the supply conduit for fluid runs substantially perpendicular in relation to a lower boundary wall of the fluid chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification
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Current AssigneeAesculap AG (B. Braun Holding GmbH & Co. KG)
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Original AssigneeAesculap AG (B. Braun Holding GmbH & Co. KG), Christoph Miethke GmbH & Co. KG
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InventorsMiethke, Christoph, Schauer, Dirk, Lutze, Theodor
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Primary Examiner(s)Hindenburg; Max
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Assistant Examiner(s)Stout; Michael C
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Application NumberUS11/978,183Publication NumberTime in Patent Office1,041 DaysField of Search600/561US Class Current600/561CPC Class CodesA61B 2562/02 Details of sensors speciall...A61B 5/0031 Implanted circuitryA61B 5/031 Intracranial pressure
