EP2775908A1 - Dispositif de mesure de la pression pouvant être implanté - Google Patents

Dispositif de mesure de la pression pouvant être implanté

Info

Publication number
EP2775908A1
EP2775908A1 EP12770013.6A EP12770013A EP2775908A1 EP 2775908 A1 EP2775908 A1 EP 2775908A1 EP 12770013 A EP12770013 A EP 12770013A EP 2775908 A1 EP2775908 A1 EP 2775908A1
Authority
EP
European Patent Office
Prior art keywords
pressure measuring
measuring device
pressure
sensor
housing
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.)
Withdrawn
Application number
EP12770013.6A
Other languages
German (de)
English (en)
Inventor
Klaus-Dieter Steinhilper
Olaf Hegemann
Anton Keller
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.)
Aesculap AG
Original Assignee
Aesculap AG
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.)
Filing date
Publication date
Application filed by Aesculap AG filed Critical Aesculap AG
Publication of EP2775908A1 publication Critical patent/EP2775908A1/fr
Withdrawn legal-status Critical Current

Links

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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0031—Implanted circuitry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
    • A61B5/6868—Brain
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0247—Pressure sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0271—Thermal or temperature sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/18—Shielding or protection of sensors from environmental influences, e.g. protection from mechanical damage

Definitions

  • the invention relates to an implantable pressure measuring device, in particular for measuring an intracranial pressure, comprising an implant housing and a pressure measuring sensor arranged in the implant housing with one or more pressure cells (s).
  • Acquisition of intracranial pressure is of paramount importance in many neurosurgical interventions. It depends on the most accurate and simple measurement of intracranial pressure, which should be done in particular minimally invasive.
  • WO 2006/117123 A1 An example of a known implantable pressure measuring device of this type is described in WO 2006/117123 A1, in which the pressure measuring sensor is arranged in a rigid housing, which is closed to the outside by a thin biocompatible membrane.
  • the pressure-dependent movement of the membrane acts via a transmission means, in particular air or a special gas or a liquid on the pressure measuring sensor or its pressure cell.
  • the object of the present invention is to provide a pressure measuring device which is easier to manufacture.
  • the simplification in the production of the implantable pressure measuring device according to the invention results in particular from the fact that the pressure measuring sensor or its pressure cell (s) are provided with a coating which is exposed to an ambient fluid and thereby the ambient pressure directly to the pressure cell (s) of the pressure measurement Sensors can act.
  • An encapsulation of the pressure measuring sensor and in particular the defined introduction of a transmission medium between a membrane and the pressure measuring sensor are eliminated.
  • the pressure Mess sensor protected by the mechanically fixed housing continues. This also simplifies a reduction in the dimensions of the device.
  • the implantable pressure measuring device according to the invention is used in particular as a measuring cell for measuring physiological environmental parameters, eg. B.
  • the implantable pressure measuring device may e.g. be used as part of a drainage system for so-called cranio-spinal fluid in regulatory disorders of the water balance in the brain.
  • a test of the finished housing accounts for tightness in the production as well as a test of the tightness of the housing occluding membrane.
  • the implantable pressure measuring device of the present invention has a coating that preferably has a layer thickness in the range of about 0.5 to about 20 pm, more preferably about 0.5 to about 10 pm, and most preferably about 0 , 5 to about 5 pm.
  • para-xylylene-based polymer material is known per se as a relatively stiff material, it is used as a coating and, in particular at the layer thicknesses given above, is sufficiently flexible to suppress pressure losses below a critical size.
  • the para-xylylene-based polymer material is preferably selected from parylene, in particular parylene of the diX C and diX N types.
  • the pressure measuring sensor is designed as a capacitive pressure measuring sensor.
  • the pressure measuring sensor with the pressure measuring cell (s) is preferably designed as a microchip, in particular as an ASIC, and permits correspondingly small dimensions of the pressure measuring device as a whole.
  • the pressure measuring sensor comprises a series of a plurality of micro-pressure measuring doses over which a further increase in accuracy in the pressure measurement is possible by averaging a plurality of measured values.
  • the implant housing itself may be made of titanium, ceramic or plastic, in particular polyetheretherketone (PEEK).
  • PEEK polyetheretherketone
  • the housing is preferably designed as a housing open on one side.
  • the shape of the implant housing is preferably hollow cylindrical, wherein the housing may also be a housing open on both sides.
  • the pressure measuring sensor is arranged with the pressure cell (s) in the housing preferably reset relative to the opening, so that the pressure measuring sensor is protected by the housing wall from mechanical damage.
  • the pressure measuring sensor is arranged on a printed circuit board, which is preferably made of ceramic.
  • the printed circuit board is preferably held in the housing by means of positive engagement and thereby substantially free of mechanical stresses, so that a total uninfluenced measurement of the ambient pressure of the pressure measuring device is possible.
  • the pressure measuring device is preferably equipped for a telemetric transmission of measured values and, for this purpose, has a transmission unit which is in operative connection with the pressure measuring sensor.
  • the transfer unit is preferably arranged on a printed circuit board, in particular on a common printed circuit board, on which the pressure measuring sensor itself is also arranged.
  • the transmission unit is integrated together with the pressure measuring sensor in a microchip.
  • the pressure measuring device comprises a sensor for a temperature measurement, wherein the temperature sensor is optionally in operative connection with the transmission unit and is preferably arranged on a common printed circuit board with the pressure sensor and / or the transmission unit.
  • the pressure measuring device according to the invention comprises a transmission unit and / or a temperature sensor
  • this input unit This sensor is also coated with the polymer material of the coating of the pressure measuring sensor.
  • the temperature sensor can also be integrated into a microchip, preferably together with a pressure-measuring sensor and optionally the transmission unit.
  • all measurement data is transmitted wirelessly.
  • Figure 1 an implantable pressure measuring device according to the invention
  • Figure 2 the sensor of the pressure measuring device of Figure 1 without housing
  • FIG. 3 shows a pressure-measuring sensor of the pressure-measuring device of FIG. 1.
  • FIG. 1 shows an implantable pressure measuring device according to the invention, designated overall by the reference numeral 10, with a measuring and transmission unit 14 which is arranged on a circuit board 16.
  • the circuit board 16 is preferably made of a ceramic material and takes, in addition to the tracks 17a to 17d, the individual components of the measurement and transmission electronics, i. In particular, various switching components 18a to 18g for the evaluation and transmission of the pressure measurement values and designed as ASIC pressure measuring sensor 20, on.
  • the switching components include e.g. Diodes and capacitors.
  • the terminals 21a to 21g of the pressure measuring sensor 20 are protected by so-called glob-tops 22, 23.
  • parylene layer which preferably has a thickness of 0.5 to 5 ⁇ m.
  • Parylene is a preferred material from the class of para-xylylene-based polymers and, in particular, in addition to its high biocompatibility has a sufficient protective effect for the underlying electronic components.
  • Parylene is a preferred material from the class of para-xylylene-based polymers and, in addition to its high biocompatibility, has, in particular, a sufficient protective effect for the underlying electronic components.
  • Figure 2 shows the circuit board 14 without the housing 12, which is preferably closed on one side or can also be designed as a hollow cylindrical part open on both sides.
  • the printed circuit board 14 with the printed conductors 17a to 17d formed thereon and the assembled components 18a to 18g and 20 is preferably provided with the parylene layer in the housing 12 prior to assembly.
  • the circuit board 14 On the back of the circuit board 14 carries a coil 26, which is used for one of the energy transfer and on the other hand, the radiation of the telemetric data, which have been detected by the measuring device.
  • the measuring device of the present invention preferably has a pressure measuring sensor 20, in which the pressure measuring sensor is formed as an array of a plurality of micro pressure cells, so that a multiple measurement of the pressure and averaging of the obtained measurement result is possible, which leads to a further increase in accuracy.
  • a temperature sensor is also integrated in the pressure measuring sensor 20 designed as an ASIC, so that temperature values can be communicated in a pressure measuring device according to the invention which can serve for an even more accurate evaluation of the measured pressure values.
  • the transmission unit is also integrated in the microchip (not shown in detail).
  • the housing 12 may be embodied, for example, as a titanium sleeve or, more preferably, be made of ceramic material or plastic (the latter in particular PEEK), the non-metallic materials having the advantage that they allow a broader radiation characteristic of the implantable pressure measuring device according to the invention.
  • the cerebrospinal fluid When implanted, the cerebrospinal fluid will be in direct contact with the coating of the circuit board 14 and the components gathered thereon, thus also coming into direct contact with the micro-pressure-cell array 24.
  • the measurement thus takes place practically directly, since there is no transmission medium for the pressure and the layer thickness is chosen to be sufficiently thin, so that no falsification of the measurement results can occur.
  • the board 14, when installed in the housing 12, is preferably held at its edge by means of a molded seat which precludes the application of mechanical stresses to the board 14, even though the temperatures of the device should vary in the course of use.
  • the housing 12 is further configured so that it protrudes beyond the edges of its opening beyond the components 18a to 18g and 20 of the printed circuit board, so that they are protected from mechanical influences.
  • a coating of the board 14 and the components assembled thereon can also take place after a fixation in the housing 12, so that then preferably the circuit board 14 and the components mounted there are coated together with the housing 12.
  • the pressure measuring sensor 20 preferably also includes a unit for transmitting the determined data of pressure and / or temperature, which preferably takes place via the coil 26 without contact or body contact.
  • the housing wall is preferably provided on the outside with a radially projecting edge 28, which facilitates the placement of the implantable pressure measuring device according to the invention, for example in a borehole of a bone.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Neurology (AREA)
  • Neurosurgery (AREA)
  • Hematology (AREA)
  • Measuring And Recording Apparatus For Diagnosis (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un dispositif de mesure de la pression pouvant être implanté, destiné notamment à mesurer une pression intracrânienne, sa fabrication étant simplifiée en ce que ledit dispositif de mesure de la pression comprend une enveloppe d'implant et un capteur manométrique lequel est disposé sur l'enveloppe d'implant et lequel comporte une ou plusieurs capsule(s) manométrique(s), ladite enveloppe d'implant présentant une ouverture, le capteur manométrique est pourvu d'un revêtement appliqué directement sur le ou les capsule(s) manométrique(s), la disposition du capteur manométrique dans l'enveloppe d'implant est telle que ladite ouverture permet à un fluide entourant ledit dispositif de mesure de la pression d'accéder directement à la / aux capsule(s) manométrique(s), la / les capsule(s) manométrique(s) du capteur manométrique, laquelle / lesquelles est / sont pourvue(s) dudit revêtement, étant ainsi directement exposée(s) à la pression ambiante, et le revêtement est réalisé à partir d'un matériau polymère à base de para-xylylène.
EP12770013.6A 2011-11-11 2012-09-18 Dispositif de mesure de la pression pouvant être implanté Withdrawn EP2775908A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011055284A DE102011055284A1 (de) 2011-11-11 2011-11-11 Implantierbare Druckmessvorrichtung
PCT/EP2012/068317 WO2013068163A1 (fr) 2011-11-11 2012-09-18 Dispositif de mesure de la pression pouvant être implanté

Publications (1)

Publication Number Publication Date
EP2775908A1 true EP2775908A1 (fr) 2014-09-17

Family

ID=47008515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12770013.6A Withdrawn EP2775908A1 (fr) 2011-11-11 2012-09-18 Dispositif de mesure de la pression pouvant être implanté

Country Status (6)

Country Link
US (1) US20140296740A1 (fr)
EP (1) EP2775908A1 (fr)
JP (1) JP2015501664A (fr)
CN (1) CN104010568A (fr)
DE (1) DE102011055284A1 (fr)
WO (1) WO2013068163A1 (fr)

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CN104434081B (zh) * 2014-01-20 2017-07-04 成都信息工程大学 植入式颅内压无线监护装置
TWM497991U (zh) * 2014-10-01 2015-04-01 Gimer Medical Co Ltd 人體植入式電子裝置之殼體結構
CN104352233A (zh) * 2014-12-05 2015-02-18 苏州景昱医疗器械有限公司 颅内压监护系统探头触点及具有其的探头
CN107529985B (zh) * 2015-03-31 2020-03-31 加州理工学院 用于长期可植入传感器和电子装置的生物相容性封装
CN104970787A (zh) * 2015-06-29 2015-10-14 苏州景昱医疗器械有限公司 探头触点、探头模组及多参数监护系统
CN105054903A (zh) * 2015-06-29 2015-11-18 苏州景昱医疗器械有限公司 多参数监护系统
CN106691362A (zh) * 2015-07-31 2017-05-24 上海圣博艾医疗科技有限公司 内窥镜
EP3222206A1 (fr) 2016-03-23 2017-09-27 ETH Zurich Procédé pour la fabrication d'un dispositif de transport, dispositif de transport, système de détection d'un paramètre physique et procédé de détection d'un paramètre physique
JP7038115B2 (ja) * 2016-10-27 2022-03-17 カーディアック ペースメイカーズ， インコーポレイテッド 圧力センサを備えた植込み型医療装置
EP3621512B1 (fr) 2017-05-12 2024-02-28 California Institute of Technology Capteur de pression extra-compartimental implantable
CN109091132A (zh) * 2018-06-28 2018-12-28 西安交通大学 一种测量颅内压的装置
US11701504B2 (en) 2020-01-17 2023-07-18 California Institute Of Technology Implantable intracranial pressure sensor

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DE10156494B4 (de) * 2001-11-16 2006-02-09 Campus Micro Technologies Gmbh Implantat zum Einbau in den menschlichen oder tierischen Körper
US7347826B1 (en) * 2003-10-16 2008-03-25 Pacesetter, Inc. Packaging sensors for long term implant
DE102005020569B4 (de) 2005-04-30 2010-08-05 Aesculap Ag Implantierbare Vorrichtung zur Erfassung von intrakorporalen Drücken
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Also Published As

Publication number Publication date
JP2015501664A (ja) 2015-01-19
WO2013068163A1 (fr) 2013-05-16
DE102011055284A1 (de) 2013-05-16
CN104010568A (zh) 2014-08-27
US20140296740A1 (en) 2014-10-02

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