DE20121938U1 - Sensor device for measurement of pressure values inside epi- or subdural drainage systems within the human body has a leak-tight housing with a sensor arrangement that transmits measurement values to an external evaluation unit - Google Patents

Sensor device for measurement of pressure values inside epi- or subdural drainage systems within the human body has a leak-tight housing with a sensor arrangement that transmits measurement values to an external evaluation unit

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Publication number
DE20121938U1
DE20121938U1 DE20121938U DE20121938U DE20121938U1 DE 20121938 U1 DE20121938 U1 DE 20121938U1 DE 20121938 U DE20121938 U DE 20121938U DE 20121938 U DE20121938 U DE 20121938U DE 20121938 U1 DE20121938 U1 DE 20121938U1
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Germany
Prior art keywords
pressure
membrane
sensor
leak
measurement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE20121938U
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German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WEISER ROLAND
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WEISER ROLAND
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by WEISER ROLAND filed Critical WEISER ROLAND
Priority to DE20121938U priority Critical patent/DE20121938U1/en
Publication of DE20121938U1 publication Critical patent/DE20121938U1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
    • A61B5/031—Intracranial pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/0007—Fluidic connecting means
    • G01L19/0023—Fluidic connecting means for flowthrough systems having a flexible pressure transmitting element
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Neurosurgery (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • External Artificial Organs (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)

Abstract

Sensor device comprises an absolute pressure sensor comprising a leak-tight housing with a pressure membrane and a serial vibration circuit comprised of a capacitor and a pressure-dependent inductance that is frequency modulated. Pressure dependent deformation of the sensor membrane changes the value of a magnetic resistance in a magnetic circuit and so enables pressure measurement via deflection of a lever.

Description

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßtThe description text was not recorded electronically

Claims (10)

1. Sensorik zur Erfassung von Druckwerten innerhalb des menschlichen Körpers und zur berührungslosen Übertragung dieser Werte auf ein externes Auswertegerät, umfas­ send
  • - einen epi-, bzw. subduralen oder im Drainagesystem integrierten Absolutdrucksen­ sor, bestehend aus einem leckdichten Gehäuse, welcher als eine Einheit über eine Druckmembran einen Serienschwingkreis bestehend aus einer Kapazität und einer druckabhängigen Induktivität, in der Frequenz moduliert,
  • - einem externen Auswertesystem, das berührungslos Messwerte des Absolutdruck­ sensors übernehmen kann,
  • - die zusammen ein System ergeben,
dadurch gekennzeichnet, daß
  • - druckabhängige Durchbiegung der Sensormembran den magnetischen Widerstand eines Magnetkreise beeinflußt und bauartbedingt durch eine Verbindung zwischen Membran und Magnetkreis lediglich an der Membranmitte und möglicher Wegver­ längerung durch einen Hebel eine hochgenaue Druckauflösung ermöglicht,
  • - positive wie negative Druckerfassung ohne weitere Kalibrierung möglich sind
  • - eine Eigenauswertung der Information durch den ungeschulten Patienten möglich ist.
1. Sensor technology for recording pressure values within the human body and for contactless transmission of these values to an external evaluation device, comprehensively
  • an epidural or subdural absolute sensor or integrated in the drainage system, consisting of a leak-tight housing which, as a unit via a pressure membrane, modulates the frequency of a series resonant circuit consisting of a capacitance and a pressure-dependent inductance,
  • - an external evaluation system that can take over measurement values of the absolute pressure sensor without contact,
  • - which together form a system,
characterized in that
  • - Pressure-dependent deflection of the sensor membrane influences the magnetic resistance of a magnetic circuit and, due to its design, only enables a high-precision pressure resolution through a connection between the membrane and the magnetic circuit at the center of the membrane and possible extension by a lever,
  • - Positive and negative pressure detection are possible without further calibration
  • - A self-evaluation of the information by the untrained patient is possible.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Sensorgehäuse aus einer leckdichten Verbindung Kapsel (1) und elastischer Membran (2) besteht, wobei die Leckdichtigkeit durch Laserschweißnähte erzielt wird.2. Device according to claim 1, characterized in that the sensor housing consists of a leak-tight connection capsule ( 1 ) and elastic membrane ( 2 ), the leak tightness being achieved by laser welds. 3. Vorrichtung nach Anspruch 1 bis 2, dadurch gekennzeichnet, daß der Sensor aus bio­ verträglichem Material, vorzugsweise Titan, bzw. Titanlegierungen, Keramik oder Sili­ kon besteht.3. Apparatus according to claim 1 to 2, characterized in that the sensor made of bio compatible material, preferably titanium, or titanium alloys, ceramics or sili kon exists. 4. Vorrichtung nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Druckabhän­ gigkeit der Induktivität dadurch erreicht wird, daß eine Scheibe (7) aus einem Werkstoff mit einer hohen magnetischen Suszeptibilität, vorzugsweise ein Ferritmaterial oder eine Nickel-Eisenlegierung, einen magnetischen Kreis abschließt, in dem ein Luftspalt durch die Membranauslenkung beeinflußt wird und diese Scheibe derart an der elastischen Membran (2) befestigt ist, daß die Membran (2) nur geringfügig in ihrer Elastizität be­ einträchtigt wird. Die Befestigung erfolgt über einen Zwischenkörper (8), der lediglich in der Membranmitte befestigt, vorzugsweise angeschweißt wird. Der Zwischenkörper kann direkt oder über ein Hebelsystem mit der Scheibe verbunden werden, vorzugs­ weise verschweißt, verpresst oder verklebt.4. Apparatus according to claim 1 to 3, characterized in that the pressure dependency of the inductance is achieved in that a disc ( 7 ) made of a material with a high magnetic susceptibility, preferably a ferrite material or a nickel-iron alloy, completes a magnetic circuit , in which an air gap is influenced by the membrane deflection and this disc is attached to the elastic membrane ( 2 ) in such a way that the membrane ( 2 ) is only slightly impaired in its elasticity. The attachment takes place via an intermediate body ( 8 ), which is only attached in the middle of the membrane, preferably welded on. The intermediate body can be connected directly or via a lever system to the pane, preferably welded, pressed or glued. 5. Vorrichtung nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß die Membran (2) zur Erhöhung der Elastizität in einer Wellenstruktur ausgeführt ist.5. Apparatus according to claim 1 to 4, characterized in that the membrane ( 2 ) is designed to increase the elasticity in a wave structure. 6. Vorrichtung nach Ansprüchen 1 bis 5 dadurch gekennzeichnet, daß eine Druckmes­ sung auch ohne die zusätzliche Kapsel (9) und Konnektoren (10) beispielsweise auf der Dura (epidural) oder unter der Dura (subdural) möglich ist. In dieser Variante stellt der Sensor eine Kapsel mit materialhomogener Aussenhülle dar.6. Device according to claims 1 to 5, characterized in that a Druckmes solution is possible even without the additional capsule ( 9 ) and connectors ( 10 ), for example on the dura (epidural) or under the dura (subdural). In this variant, the sensor is a capsule with a material-homogeneous outer shell. 7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die externe Auswerte­ einheit auf Grundlage der Meßdaten Shuntfehlfunktionen erkennen kann.7. The device according to claim 1, characterized in that the external evaluations unit can detect shunt malfunctions based on the measurement data. 8. Vorrichtung nach Anspruch 1 und 7, dadurch gekennzeichnet, daß das externe Aus­ wertesystem Einstellungen an verstellbaren Ventilen vornehmen kann.8. The device according to claim 1 and 7, characterized in that the external off value system can make adjustments to adjustable valves. 9. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die externe Auswerte­ einheit den ermittelten Absolutdruck im Drainagesystem über ein integriertes Barome­ termodul in Relation zum atmosphärischen Luftdruck setzen kann.9. The device according to claim 1, characterized in that the external evaluations unit the determined absolute pressure in the drainage system via an integrated barome term module in relation to atmospheric air pressure. 10. Vorrichtung nach Ansprüchen 1 bis 9 dadurch gekennzeichnet, daß auch die Mes­ sung von Drücken anderer Körperflüssigkeiten, z. B. Blutdruck oder Blasendruck, ein­ setzbar ist.10. Device according to claims 1 to 9, characterized in that the measurement solution of pressures of other body fluids, e.g. B. blood pressure or bladder pressure, a is settable.
DE20121938U 2001-09-25 2001-09-25 Sensor device for measurement of pressure values inside epi- or subdural drainage systems within the human body has a leak-tight housing with a sensor arrangement that transmits measurement values to an external evaluation unit Expired - Lifetime DE20121938U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE20121938U DE20121938U1 (en) 2001-09-25 2001-09-25 Sensor device for measurement of pressure values inside epi- or subdural drainage systems within the human body has a leak-tight housing with a sensor arrangement that transmits measurement values to an external evaluation unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20121938U DE20121938U1 (en) 2001-09-25 2001-09-25 Sensor device for measurement of pressure values inside epi- or subdural drainage systems within the human body has a leak-tight housing with a sensor arrangement that transmits measurement values to an external evaluation unit
DE10147211 2001-09-25

Publications (1)

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DE20121938U1 true DE20121938U1 (en) 2003-09-04

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DE20121938U Expired - Lifetime DE20121938U1 (en) 2001-09-25 2001-09-25 Sensor device for measurement of pressure values inside epi- or subdural drainage systems within the human body has a leak-tight housing with a sensor arrangement that transmits measurement values to an external evaluation unit

Country Status (1)

Country Link
DE (1) DE20121938U1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005077262A1 (en) * 2004-02-12 2005-08-25 Gambro Lundia Ab Pressure sensing
DE102005016812B3 (en) * 2005-04-07 2006-12-21 Fachhochschule Koblenz Measurement device for pressure in a flow channel has a closed flow channel filled by a flow substance and a membrane distorted by changes in pressure
DE102010051743A1 (en) 2010-11-19 2012-05-24 C. Miethke Gmbh & Co. Kg Programmable hydrocephalus valve

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005077262A1 (en) * 2004-02-12 2005-08-25 Gambro Lundia Ab Pressure sensing
US7771380B2 (en) 2004-02-12 2010-08-10 Gambro Lundia Ab Pressure sensing
KR101158596B1 (en) * 2004-02-12 2012-06-22 감브로 룬디아 아베 Pressure sensing
DE102005016812B3 (en) * 2005-04-07 2006-12-21 Fachhochschule Koblenz Measurement device for pressure in a flow channel has a closed flow channel filled by a flow substance and a membrane distorted by changes in pressure
DE102010051743A1 (en) 2010-11-19 2012-05-24 C. Miethke Gmbh & Co. Kg Programmable hydrocephalus valve
WO2012065750A2 (en) 2010-11-19 2012-05-24 C.Miethke Gmbh & Co Kg Electrically actuatable, in particular programmable hydrocephalus valve
WO2012065750A3 (en) * 2010-11-19 2012-11-22 C.Miethke Gmbh & Co Kg Electrically actuatable, in particular programmable hydrocephalus valve
US9155871B2 (en) 2010-11-19 2015-10-13 C. Miethke Gmbh & Co Kg Electrically operable, in one possible embodiment programmable hydrocephalus valve
DE102010051743B4 (en) 2010-11-19 2022-09-01 C. Miethke Gmbh & Co. Kg Programmable hydrocephalus valve

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R207 Utility model specification

Effective date: 20031009

R156 Lapse of ip right after 3 years

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