EP4483688A1 - Medizinisches instrument mit einem piezoelektrischen sensorstack und herstellungsverfahren dafür - Google Patents
Medizinisches instrument mit einem piezoelektrischen sensorstack und herstellungsverfahren dafürInfo
- Publication number
- EP4483688A1 EP4483688A1 EP23704331.0A EP23704331A EP4483688A1 EP 4483688 A1 EP4483688 A1 EP 4483688A1 EP 23704331 A EP23704331 A EP 23704331A EP 4483688 A1 EP4483688 A1 EP 4483688A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- section
- medical instrument
- electrically conductive
- sections
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
- H10N30/302—Sensors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0688—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction with foil-type piezoelectric elements, e.g. PVDF
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; Determining position of diagnostic devices within or on the body of the patient
- A61B5/065—Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe
- A61B5/068—Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe using impedance sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Clinical applications
- A61B8/0833—Clinical applications involving detecting or locating foreign bodies or organic structures
- A61B8/0841—Clinical applications involving detecting or locating foreign bodies or organic structures for locating instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
- H10N30/883—Additional insulation means preventing electrical, physical or chemical damage, e.g. protective coatings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
- A61B2090/3925—Markers, e.g. radio-opaque or breast lesions markers ultrasonic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
- A61B8/445—Details of catheter construction
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M2025/0166—Sensors, electrodes or the like for guiding the catheter to a target zone, e.g. image guided or magnetically guided
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/76—Medical, dental
Definitions
- the invention relates to a medical instrument with a sensor stack and a method for producing such a medical instrument.
- a medical instrument in the form of a catheter with a sensor unit for detecting and converting a physical measurement variable is known from WO 2017/013224 A1, for example.
- the sensor unit is designed in the form of an ultrasonic transducer and is used for ultrasound-based location of the tip of the catheter in a patient's body, also referred to as tracking.
- the sensor unit is formed from several film-like functional layers stacked on top of one another and can therefore also be referred to as a sensor stack.
- the sensor stack is manufactured by gluing the individual functional layers in layers, which is also referred to as lamination.
- the laminated sensor stack is provided with an adhesive layer, wrapped around the catheter tip and glued to the catheter tip using the adhesive layer.
- DE 10 2018 220 606 A1 also discloses a medical instrument that can be designed as a cannula, for example, and has a sensor unit at a distal end that is set up to detect a physical measurement variable and convert it into an electrical measurement signal.
- a disadvantage of medical instruments known from the prior art with a sensor unit is often inadequate measurement variable detection and therefore a low signal strength, which makes it difficult, for example, to navigate the medical instrument in a patient's body to a target area.
- the production of appropriately designed medical instruments is usually very time-consuming and costly.
- the object of the invention is therefore to provide a medical instrument and a method for producing a medical instrument which, in particular, partially or completely avoid the disadvantages mentioned in the introduction.
- the invention relates to a medical instrument with a distal end that is intended for insertion into a patient's body.
- the medical instrument can in particular be a catheter, a cannula or another medical instrument that is provided at least in sections for insertion into the body of a patient.
- the distal end can in particular be a catheter tip or a cannula tip.
- the medical instrument has a sensor unit arranged at the distal end.
- the sensor unit is set up to detect a physical measurement variable and convert it into an electrical measurement signal and is designed in the form of a sensor stack constructed in layers.
- the sensor stack can be set up to record, for example, a temperature, a hydrostatic pressure or some other physical measured variable of therapeutic and/or diagnostic interest.
- the sensor stack, in particular the piezo layer of the first section, is preferably set up for detecting and converting ultrasonic pulses and thus preferably forms an ultrasonic transducer.
- the sensor stack has a first section and a second section.
- the first section can also be referred to as a sensor section.
- the second section can also be referred to as a contacting section, in which electrical signals that arise in the first section of the sensor stack can be picked up or derived.
- the first section is preferably a distal section of the sensor stack and the second section is a proximal section of the sensor stack.
- the sensor stack can be arranged on the medical instrument in such a way that the first section in the distal direction at the distal end of the medical Instrument and the second section is arranged in the proximal direction at the distal end of the medical instrument.
- first section and the second section are preferably arranged one behind the other, in particular directly one behind the other.
- the first section and the second section are particularly preferably formed in one piece.
- the first section and the second section can be formed separately from one another and connected to one another, in particular in a materially bonded manner.
- the sensor stack can consist of the first section and the second section.
- the sensor stack is preferably produced by means of a printing process, in particular offset printing, inkjet printing, screen printing, aerosol jet printing, spray coating or dip coating.
- the first section and the second section of the sensor stack each have a plurality of functional layers arranged one above the other, in particular arranged directly or not directly one above the other.
- the functional layers are applied, in particular printed, on top of one another in overlapping layers, at least in sections, in particular only in sections or completely.
- the first section has at least the following functional layers: a first insulation layer covering and electrically insulating the distal end of the medical instrument at least in sections, in particular only in sections or completely, i.e. continuously or contiguously, a first insulation layer on the first insulation layer at least in sections, in particular only in sections or completely , ie continuous or continuous, applied, in particular printed, electrically conductive first electrode layer, a piezoactive piezo layer applied, in particular printed, at least in sections, in particular only in sections or completely, ie continuously or contiguously, on the first electrode layer, a piezo-active piezo layer at least in sections, in particular only partially or completely, i.e.
- the first insulation layer can cover the distal end of the medical instrument directly or not directly.
- the first electrode layer can/can be directly or not directly on the first insulation layer and/or the piezo layer directly or not directly on the first electrode layer and/or the second electrode layer directly or not directly on the piezo layer and/or the second insulation layer directly or not applied, in particular printed, directly onto the second electrode layer and/or the shielding layer directly or not directly onto the second insulating layer.
- the second section has at least the following functional layers: an insulating layer covering and electrically insulating the distal end of the medical instrument at least in sections, in particular only in sections or completely, i.e. continuously or contiguously, continuously or coherently applied, in particular printed, electrically conductive first conductor track and an electrically conductive second conductor track applied, in particular printed, at least in sections, in particular only in sections or completely, i.e. continuously or contiguously, to the insulating layer.
- the insulation layer can cover the distal end of the medical instrument directly or not directly.
- first conductor track can be applied, in particular printed, directly or not directly onto the insulating layer and/or the second conductor track can be applied directly or not directly onto the electrically insulating insulating layer.
- the first conductor track and the second conductor track are preferably applied, in particular printed, on different sections of the insulating layer.
- distal is to be understood as being further away from the center of the body of a person, in particular a doctor, who is using the medical instrument as intended.
- proximal is to be understood within the meaning of the present invention as being closer to the middle of the body of a person, in particular a doctor, who is using the medical instrument as intended.
- sensor stack is to be understood as meaning a sensor unit constructed in layers from a plurality of functional layers, in particular in the form of a film or foil.
- piezoactive piezo layer should be understood to mean a layer on which a voltage is generated under the action of mechanical pressure (piezoelectric effect).
- the shielding layer preferably serves to shield the other functional layers, in particular the first section, preferably the piezo layer, of the sensor stack from electrical and/or magnetic fields. Such fields can lead to a disruption in the measurement variable acquisition and/or measurement variable conversion and/or measurement variable derivation.
- the shielding layer enables the sensor stack to function with as few disturbances as possible.
- the first conductor track and the second conductor track of the second section are used to divert the electrical measurement signals of the first section, in particular the piezo layer of the first section, in the direction of a proximal end of the medical instrument.
- the first conductor track and the second conductor track can be electrically conductively contacted or can be contacted with an evaluation unit for evaluating the electrical measurement signals of the first section, in particular the piezo layer of the first section.
- the first insulation layer of the first section and the insulation layer of the second section are of identical design.
- the first insulating layer of the first section and the insulating layer of the second section are formed in one piece.
- the first insulating layer of the first section and the insulating layer of the second section can be formed separately from one another and connected to one another, in particular in a materially bonded manner.
- the second section of the sensor stack is preferably free of a further insulation layer applied, in particular printed, in particular to the first conductor track and/or second conductor track and free of an electrically shielding shielding layer.
- the first conductor track and the second conductor track of the second section are each preferably an exposed conductor track. This can advantageously bring about a contact, for example to an amplifier unit which is set up for amplifying the measurement signals of the sensor stack, and/or an evaluation unit, in particular downstream of the amplifier unit, which is set up for evaluating the electrical measurement signals.
- the first electrode layer of the first section and the first conductor track of the second section are formed in one piece.
- a one-piece design of the first electrode layer and the first conductor track has the advantage, in principle, that electrical signals that arise in the first section of the sensor stack can be picked up more quickly.
- the first electrode layer can be applied separately from the first conductor track, in particular printed on, and electrically contacted with it.
- the second electrode layer of the first section and the second conductor track of the second section are preferably formed in one piece.
- a one-piece formation of the second electrode layer and the second conductor track (also) has the advantage, in principle, that electrical signals that arise in the first section of the sensor stack can be picked up more quickly.
- the second electrode layer can be applied separately from the second conductor track, in particular printed on, and electrically contacted with it.
- the functional layers of the first section and/or second section can, independently of one another, have a layer thickness of 1 ⁇ m to 30 ⁇ m, in particular from 0.5 ⁇ m to 20 ⁇ m, preferably from 1 ⁇ m to 10 ⁇ m.
- the first electrode layer and the second electrode layer are designed differently, in particular at least in sections, for example only in sections or continuously.
- the first electrode layer and the second electrode layer can be of the same design, in particular at least in sections, for example only in sections or continuously.
- first electrode layer in particular only the first electrode layer
- second electrode layer in particular only the second electrode layer, can be formed in one piece or in the form of layer sections formed separately from one another.
- first electrode layer can be formed in one piece and the second electrode layer can be formed in the form of layer sections formed separately from one another.
- the first electrode layer can be formed in the form of layer sections formed separately from one another, and the second electrode layer can be formed in one piece.
- the first electrode layer and the second electrode layer can each be formed in one piece or each in the form of layer sections formed separately from one another.
- the first electrode layer can have a layer thickness of 0.1 ⁇ m to 30 ⁇ m, in particular 0.5 ⁇ m to 10 ⁇ m, preferably 1 ⁇ m to 2 ⁇ m.
- the second electrode layer can also have a layer thickness of 0.1 ⁇ m to 30 ⁇ m, in particular 0.5 ⁇ m to 10 ⁇ m, preferably 1 ⁇ m to 2 ⁇ m.
- any electrically conductive material is suitable for the first electrode layer and the second electrode layer.
- the first electrode layer and the second electrode layer preferably each have a printable conductive material or preferably each consist of such a material.
- at least one of the two electrode layers has a material or consists of a material that can be structured very finely, in particular in the micrometer range, for example in a line width of 100 ⁇ m.
- the first electrode layer and the second electrode layer independently of one another have an electrically conductive material or consist of an electrically conductive material that is selected from the group consisting of electrically conductive polymers, electrically conductive metals and combinations thereof.
- suitable electrically conductive polymers and electrically conductive metals reference is made to the following statements. If/is the first electrode layer and/or the second electrode layer in the form of layer sections formed separately from one another, the respective layer sections of the first electrode layer and/or second electrode layer can independently of one another have an electrically conductive material or consist of an electrically conductive material that consists of selected from the above group.
- the first electrode layer and the second electrode layer independently of one another, have an electrically conductive material or, independently of one another, consist of an electrically conductive material which is selected from the group consisting of polypyrrole, doped polyethene, polyaniline, polythiophene, preferably poly( 3,4-ethylenedioxythiophene), gold, platinum, indium, tin, copper, silver, preferably nanoscale silver and/or microscale silver, and combinations of at least two of the aforementioned electrically conductive materials.
- the first electrode layer has an electrically conductive metal, in particular an electrically conductive and nanoscale metal and/or an electrically conductive and microscale metal, or carbon and the second electrode layer has an electrically conductive polymer or vice versa.
- the first electrode layer and the second electrode layer can consist of the respective aforementioned electrically conductive materials.
- the electrically conductive metal can in particular be selected from the group consisting of silver, preferably nanoscale silver and/or microscale silver, gold, platinum, indium, tin, copper and combinations of at least two of the aforementioned electrically conductive metals.
- the electrically conductive polymer can in particular be selected from the group consisting of polythiophene, preferably poly(3,4-ethylenedioxythiophene), polypyrrole, doped polyethene, polyaniline and combinations of at least two of the aforementioned electrically conductive polymers.
- nanoscale metal should be understood to mean a metal with a particle diameter, in particular an average particle diameter, of 1 nm to 1000 nm, in particular 10 nm to 500 nm, preferably 50 nm to 250 nm.
- microscale metal should be understood to mean a metal with a particle diameter, in particular an average particle diameter, of 1 ⁇ m to 100 ⁇ m, in particular 3 ⁇ m to 50 ⁇ m, preferably 5 ⁇ m to 30 ⁇ m.
- the first electrode layer and/or the second electrode layer can be produced from a paste which contains a nanoscale metal and/or a microscale metal.
- the electrically conductive metal in particular electrically conductive and nanoscale metal and/or electrically conductive and microscale metal
- the conductive polymer is poly(3,4-ethylenedioxythiophene).
- the first electrode layer has silver, in particular nanoscale silver and/or microscale silver
- the second electrode layer has poly(3,4-ethylenedioxythiophene) or vice versa.
- the electrode layers can consist of the respective aforementioned materials.
- the use of silver, in particular nanoscale silver has the advantage that it can be applied in particularly fine structures, in particular printed, for example by means of screen printing.
- the silver can, for example, have a diameter, in particular an average diameter, of 0.5 ⁇ m to 30 ⁇ m, in particular 1 ⁇ m to 20 ⁇ m, preferably 5 ⁇ m to 15 ⁇ m.
- the use of poly(3,4-ethylenedioxythiophene) can advantageously prevent breakdowns occurring in the piezoelectric layer located between the first electrode layer and the second electrode layer during polarization with high voltage.
- an electrode layer with or made of poly(3,4-ethylenedioxythiophene) is advantageously self-healing in the event of an electrical breakdown, in that the layer closes again at the affected location due to the heat generated.
- the smooth surface of poly(3,4-ethylenedioxythiophene) has a positive effect in preventing voltage breakdowns. Overall, the risk of a permanent short circuit between the electrode layers can thus be eliminated.
- the piezo layer can be configured in one piece or in the form of layer sections configured separately from one another.
- the piezo layer can have a layer thickness of 0.5 ⁇ m to 30 ⁇ m, in particular 1 ⁇ m to 20 ⁇ m, preferably 1 ⁇ m to 10 ⁇ m.
- piezoresistive materials in particular piezoresistive polymers, piezoresistive ceramics and combinations thereof, can be considered for the piezo layer.
- the piezoresistive polymers can be homopolymers or copolymers, in particular bi- and/or terpolymers, in particular as described below.
- the piezo layer has a material or the piezo layer consists of a material that is selected from the group consisting of polyvinylidene fluoride (PVDF), poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)), poly(vinylidene fluoride -Trifluoroethylene-chlorotrifluoroethylene) (P(VDF-T rFE-CTFE)),
- the piezo layer is in the form of layer sections that are formed separately from one another, the layer sections can have a material independently of one another or consist of a material that is selected from the aforementioned group.
- the piezo layer preferably has poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) or consists of poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)).
- the piezo layer can be applied, in particular printed, in a continuous manner in the circumferential direction of the distal end of the medical instrument.
- the remaining functional layers can be applied, in particular printed, only in sections to the distal end of the medical instrument.
- first conductor track in particular only the first conductor track
- second conductor track in particular only the second conductor track, can be formed in one piece or in the form of layer sections formed separately from one another.
- the first conductor track can be designed in one piece and the second conductor track can be designed in the form of layer sections that are designed separately from one another.
- the first conductor track can be formed in the form of layer sections that are formed separately from one another, and the second conductor line can be formed in one piece.
- the first conductor track and the second conductor track can each be formed in one piece or in the form of layer sections formed separately from one another.
- the first conductor track can have a layer thickness of 0.1 ⁇ m to 30 ⁇ m, in particular 0.5 ⁇ m to 10 ⁇ m, preferably 1 ⁇ m to 2 ⁇ m.
- the second conductor track can have a layer thickness of 0.1 ⁇ m to 30 ⁇ m, in particular 0.5 ⁇ m to 10 ⁇ m, preferably 1 ⁇ m to 2 ⁇ m.
- first conductor track and the second conductor track can be designed differently, in particular at least in sections, for example only in sections or continuously.
- first conductor track and the second conductor track can be configured identically, in particular at least in sections, for example only in sections or continuously.
- any conductive material is suitable for the first conductor track and the second conductor track.
- the first conductor track and the second conductor track each have an electrically conductive metal, in particular an electrically conductive and nanoscale metal and/or an electrically conductive and microscale metal.
- the first conductor track and the second conductor track can each consist of such a metal.
- the first conductor track and the second conductor track independently of one another have an electrically conductive metal, in particular silver, preferably nanoscale silver and/or microscale silver, gold, platinum, indium, tin, copper or combinations of at least two of the aforementioned metals.
- an electrically conductive metal in particular silver, preferably nanoscale silver and/or microscale silver, gold, platinum, indium, tin, copper or combinations of at least two of the aforementioned metals.
- the respective layer sections of the first conductor track and/or second conductor track can have a material independently of one another or consist of a material selected from the aforementioned group is.
- the first conductor track and/or the second conductor track preferably has/have silver, in particular nanoscale silver.
- the first conductor track and/or the second conductor track can consist of silver, in particular nanoscale silver.
- the silver preferably has a diameter, in particular an average diameter, of 1 nm to 1000 nm, in particular 10 nm to 500 nm, preferably 50 nm to 250 nm.
- Correspondingly designed interconnects advantageously have a reduced brittleness and a increased pliability or flexibility.
- a further advantage is that the first conductor track and the second conductor track, in the case of silver, adhere better to a functional layer, in particular an insulating layer, lying below the conductor tracks in relation to a layer thickness direction D of the sensor stack.
- the sensor stack in particular the first section and/or second section of the sensor stack, also has an adhesion layer.
- the adhesive layer is preferably used for the material connection, in particular by gluing, of the sensor stack to the medical instrument.
- the adhesion layer is preferably arranged, in particular directly or not directly, between the first insulation layer of the first section and the surface of the medical instrument and/or, in particular directly or not directly, between the insulation layer of the second section and the surface of the medical instrument.
- the first section of the sensor stack can have an adhesion layer which is arranged, in particular directly or not directly, between the first insulation layer and the surface of the medical instrument.
- the adhesion layer is preferably arranged, in particular directly or not directly, below the first insulation layer of the first section.
- the adhesion layer of the first section is applied directly to the medical instrument, in particular printed thereon.
- the second section of the sensor stack can (also) have an adhesion layer which is arranged, in particular directly or not directly, between the insulation layer and the surface of the medical instrument.
- the adhesion layer is preferably arranged, in particular directly or not directly, below the insulation layer of the second section.
- the adhesive layer of the second section is (also) applied directly to the medical instrument, in particular printed thereon.
- the adhesion layer described in the preceding paragraphs can be formed in one piece or in the form of layer sections formed separately from one another.
- the adhesive layer of the first section in particular only of the first section, can be formed in one piece or in the form of layer sections formed separately from one another.
- the adhesive layer, in particular only of the second section can be formed in one piece or in the form of layer sections formed separately from one another.
- the adhesion layer of the first section can be formed in one piece and the adhesion layer of the second section can be formed in the form of layer sections formed separately from one another.
- the adhesive layer of the first section can be formed in the form of layer sections formed separately from one another, and the adhesive layer of the second section can be formed in one piece.
- the adhesion layer of the first section and the adhesion layer of the second section can each be formed in one piece or in the form of separate layer sections.
- adhesion layer of the first section and the adhesion layer of the second section can be formed in one piece.
- the adhesion layer of the first section can be applied separately from the adhesion layer of the second section, in particular printed on, and connected to it with a material bond.
- the adhesion layer in particular of the first section and/or second section, can have a layer thickness of 1 ⁇ m to 50 ⁇ m, in particular 2 ⁇ m to 30 ⁇ m, preferably 5 ⁇ m to 15 ⁇ m.
- the adhesion layer in particular of the first section and/or second section of the sensor stack, has an electrically conductive metal, in particular an electrically conductive and microscale metal.
- the metal is preferably selected from the group consisting of silver, gold, platinum, indium, tin, copper and combinations of at least two of the foregoing metals.
- the adhesion layer is in the form of layer sections formed separately from one another formed, the layer sections can have a metal independently of one another or consist of a metal that is selected from the aforementioned group.
- the metal of the adhesion layer in particular of the first section and/or second section, is silver, in particular microscale silver.
- the silver preferably has a diameter, in particular an average diameter, of 0.5 ⁇ m to 30 ⁇ m, in particular 1 ⁇ m to 20 ⁇ m, preferably 5 ⁇ m to 15 ⁇ m.
- a suitably designed adhesion layer is advantageously characterized by reduced brittleness and increased flexibility.
- the sensor stack in particular the first section and/or second section, preferably second section, of the sensor stack also has an anti-corrosion layer.
- an anti-corrosion layer As a result, protection of the conductor tracks against corrosion, particularly in the area of contact with other materials, can advantageously be ensured during signal transmission and a long-term constant electrical contact resistance and low contact resistance can be ensured.
- the anti-corrosion layer is preferably applied, in particular printed, above the first conductor track and the second conductor track with respect to a layer thickness direction D of the sensor stack, in particular directly or not directly.
- the anti-corrosion layer can be formed in one piece.
- the anti-corrosion layer can be formed in the form of layer sections formed separately from one another.
- the anti-corrosion layer can have a layer thickness of 0.5 ⁇ m to 30 ⁇ m, in particular 1 ⁇ m to 20 ⁇ m, preferably 2 ⁇ m to 10 ⁇ m.
- the anti-corrosion layer has a material or consists of a material that is selected from the group consisting of carbon, noble metals, in particular gold and/or platinum, and combinations of at least two of the aforementioned materials. If the anti-corrosion layer is in the form of layer sections that are formed separately from one another, the layer sections can be independent each other have a material or consist of a material that is selected from the aforementioned group.
- the anti-corrosion layer preferably has conductive carbon (carbon).
- the anti-corrosion layer can consist of conductive carbon (carbon). Carbon has turned out to be particularly advantageous for avoiding corrosion and thus for ensuring an electrical contact resistance that is constant over time.
- carbon for example, is softer than the noble metals mentioned above and can therefore adapt better to a contact.
- the sensor stack in particular the first section and/or second section, in particular only the first section, of the sensor stack has a biocompatible cover layer.
- the cover layer is preferably arranged on the outside in relation to a layer thickness direction D of the sensor stack.
- the cover layer is preferably applied, in particular printed, in relation to a layer thickness direction D of the sensor stack, in particular directly or not directly above the shielding layer.
- the biocompatible cover layer can preferably form a (final) outer layer of the sensor stack, in particular of the first section of the sensor stack.
- the biocompatible cover layer advantageously avoids direct contact of the remaining functional layers with the patient's body. This counteracts any undesired chemical and/or biological interactions and thus a possible impairment of the patient's health.
- the biocompatible cover layer can be formed in one piece.
- the biocompatible cover layer can be formed in the form of layer sections formed separately from one another.
- the biocompatible cover layer can have a layer thickness of 1 ⁇ m to 30 ⁇ m, in particular 2 ⁇ m to 20 ⁇ m, preferably 5 ⁇ m to 15 ⁇ m.
- the biocompatible top layer comprises or consists of a material selected from the group consisting of polyethylene terephthalate (PET), polyethylene (PE), polytetrafluoroethylene (PTFE), Teflon (PTFE), polyester, parylene, polyester and combinations of at least two of the above materials.
- PET polyethylene terephthalate
- PE polyethylene
- PTFE polytetrafluoroethylene
- PTFE Teflon
- polyester parylene
- polyester parylene
- the first insulation layer of the first section of the sensor stack can be formed in one piece or in the form of a plurality of layer sections formed separately from one another.
- the first insulation layer of the first section and/or the insulation layer of the second section of the sensor stack can have a layer thickness of 1 ⁇ m to 50 ⁇ m, in particular 2 ⁇ m to 30 ⁇ m, preferably 4 ⁇ m to 20 ⁇ m.
- the second insulation layer of the first section of the sensor stack can be formed in one piece or in the form of a plurality of layer sections formed separately from one another.
- the second insulating layer of the first section can have a layer thickness of 1 ⁇ m to 50 ⁇ m, in particular 5 ⁇ m to 40 ⁇ m, preferably 10 ⁇ m to 30 ⁇ m.
- the insulation layer of the second section of the sensor stack can be formed as a single piece or in the form of a plurality of layer sections formed separately from one another.
- the insulating layer of the second section can have a layer thickness of 1 ⁇ m to 50 ⁇ m, in particular 5 ⁇ m to 40 ⁇ m, preferably 10 ⁇ m to 30 ⁇ m.
- first insulating layer and the second insulating layer of the first section and the insulating layer of the second section can be designed differently, in particular at least in sections, for example only in sections or continuously.
- first insulation layer and the second insulation layer of the first section and the insulation layer of the second section can be configured identically, in particular at least in sections, for example only in sections or continuously.
- non-conductive materials are suitable for the first insulation layer and the second insulation layer of the first section and the insulation layer of the second section.
- the non-conductive materials can be, in particular, Act UV-curing materials and / or thermally curing materials. These materials have the advantage of fast curing and thus shorten the manufacturing time of the sensor stack and in particular of the medical instrument.
- the first insulating layer and the second insulating layer of the first section and the insulating layer of the second section independently of one another, have an electrically insulating material that is selected from the group consisting of UV-curing materials, in particular polyester resins, thermally curing materials, in particular as mentioned above, i.e. resins or polyesters, plastics, in particular polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether sulfone (PES), polysulfone (PSU), polyimide (PI), polycarbonate (PC) or polyetherimide (PEI) and combinations of at least two of the aforementioned electrically insulating materials.
- UV-curing materials in particular polyester resins, thermally curing materials, in particular as mentioned above, i.e. resins or polyesters, plastics, in particular polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether sulfone (PES), polysulfone (PSU), polyimide
- the respective layer sections of the first insulation layer and/or second insulation layer of the first section and/or the insulating layer of the second section independently of one another have a material or consist of a material that is selected from the aforementioned group.
- the first insulation layer of the first section and the insulation layer of the second section preferably have the same material at least in sections, in particular only in sections or continuously, or consist of the same material.
- the material is preferably polyethylene naphthalate (PEN).
- PEN polyethylene naphthalate
- the second insulation layer of the first section and/or the insulation layer of the second section preferably has/has a UV-curing material, preferably a polyester resin, or consist/consists of such a material.
- UV-curing materials in particular polyester resin
- a further advantage consists in an improved adhesive effect for directly adjoining functional layers, in particular the shielding layer of the first section.
- UV-curing materials, in particular polyester resin do not lead to any interactions with underlying functional layers immediately after application, in particular printing, which means that the sensor properties are not adversely affected.
- the second insulation layer of the first section serves as an electrically insulating layer between the shielding layer and the electrode layers of the first section, in particular the second electrode layer.
- the distance between the shielding layer and the electrode layers, possible capacitances and the size of the sensor unit can be specifically influenced by the thickness of the second insulation layer of the first section.
- the second insulation layer of the first section can have a layer thickness of 1 ⁇ m to 50 ⁇ m, in particular from 5 ⁇ m to 40 ⁇ m, preferably from 10 ⁇ m to 30 ⁇ m.
- the second insulating layer can be formed as an integrally coherent layer or in the form of a plurality of, for example two or three, sub-layers formed separately from one another.
- the shielding layer can be formed in one piece or in the form of a plurality of layer sections formed separately from one another.
- electrically conductive materials are suitable for the electrically shielding shielding layer. However, preference is given to electrically conductive materials with the lowest possible specific electrical resistance and good adhesion.
- the shielding layer has a material, in particular an electrically conductive material, or consists of a material, in particular electrically conductive material, which is selected from the group consisting of carbon, conductive polymer, in particular polypyrrole, doped polyethene, polyaniline or Polythiophene, preferably poly(3,4-ethylenedioxythiophene), conductive metals, in particular gold, platinum, indium, tin, copper or silver, preferably nanoscale silver, and combinations of at least two of the aforementioned materials, in particular electrically conductive materials.
- the Shielding layer in the form of a plurality of layer sections formed separately from one another, the layer sections can have a material or consist of a material that is selected from the aforementioned group.
- the shielding layer preferably has a conductive metal, in particular silver.
- At least one second applied, in particular printed, sensor stack can be provided at the distal end of the medical instrument, which is arranged at a distance from the sensor stack in the longitudinal direction of the distal end.
- the second sensor stack is preferably constructed in the same way as the sensor stack.
- the second sensor stack can be formed separately, in particular printed, and then applied, in particular printed, to the distal end of the medical instrument. Alternatively, the second sensor stack can be applied, in particular printed, directly onto the distal end.
- the functional layers (including their arrangement) of the second sensor stack to avoid repetition, reference is made to the relevant disclosure in connection with the (first) sensor stack, which applies in a corresponding manner to the second sensor stack.
- the invention relates to a method for producing a medical instrument according to the first aspect of the invention, in which functional layers are applied, in particular printed, to the distal end of the medical instrument to form the sensor stack.
- the functional layers of the sensor stack are applied, in particular printed, directly to a wall section of the distal end of the medical instrument. This can also air pockets between the sensor stack and the Wall section are avoided, which is advantageous both in terms of a fixed connection of the sensor stack to the distal end of the medical instrument and in terms of the measurement sensitivity of the sensor stack.
- a first functional layer in relation to a layer thickness direction D of the sensor tack in particular the adhesion layer of the first and/or second section or the first insulation layer of the first section and/or the insulation layer of the second section, is applied to the medical instrument, in particular printed on which all other functional layers are then applied, in particular printed on.
- the sensor stack is preferably formed by means of a printing process, in particular screen printing.
- Screen printing has the advantage of providing good long-term process stability at low cost.
- the sensor stack can also be formed using other printing methods such as offset printing, inkjet printing, aerosol jet printing, spray coating or dip coating.
- the first electrode layer and/or the second electrode layer of the sensor stack can be produced from a metal-containing paste, in particular a paste that contains nanoscale metal, preferably nanoscale silver, and/or microscale metal, preferably microscale silver.
- a conductive metal such as gold, platinum, indium, tin or copper can be applied to a foil to form the first electrode layer and/or second electrode layer.
- first conductor track and/or the second conductor track of the sensor stack can be produced from a metal-containing paste, in particular a paste that contains nanoscale metal, preferably nanoscale silver, and/or microscale metal, preferably microscale silver.
- first electrode layer and/or second electrode layer and/or first conductor track and/or second conductor track a conductive metal such as gold, platinum, indium, tin or copper can be applied to a foil and applied by structuring and/or etching an appropriate line width can be formed. Further functional layers can then be applied, in particular printed, or applied using thin-layer technology (evaporation or sputtering).
- a conductive metal such as gold, platinum, indium, tin or copper
- Further functional layers can then be applied, in particular printed, or applied using thin-layer technology (evaporation or sputtering).
- the invention relates to a method for producing a medical instrument according to the first aspect of the invention, in which the functional layers are produced using a carrier layer and/or stiffening layer as a separate sensor stack and then the separately produced sensor stack is applied to the applied, in particular printed, on the distal end of the medical instrument.
- carrier layer is to be understood in the sense of the present invention as a layer to which all further functional layers are applied, preferably with the exception of the adhesion layer, which is preferably applied on the opposite side to the functional layer side of the carrier layer.
- the carrier layer can also be referred to as a substrate layer.
- the carrier layer is preferably designed in the form of a film.
- the carrier layer is preferably designed to be printable and in particular to withstand temperatures in a drying process without major shrinkage.
- the carrier layer can have a layer thickness of 10 ⁇ m to 500 ⁇ m, in particular 20 ⁇ m to 250 ⁇ m, preferably 50 ⁇ m to 150 ⁇ m.
- the stiffening layer can also be referred to as a liner layer.
- the stiffening layer is preferably designed in the form of a film. More preferably, the stiffening layer has a greater layer thickness than the substrate layer.
- the stiffening layer can have a layer thickness which is greater by at least a factor of 2 than the layer thickness of the carrier layer.
- the stiffening layer can have a layer thickness of 10 ⁇ m to 500 ⁇ m, in particular 20 ⁇ m to 250 ⁇ m, preferably 50 ⁇ m to 150 ⁇ m.
- the stiffening layer can in particular cover an adhesive layer applied to a rear side of the carrier layer and thereby prevent the substrate layer from sticking together unintentionally.
- the stiffening layer can also be coated, for example with a silicone. As a result, permanent adhesion between the stiffening layer and the carrier layer can advantageously be prevented.
- the carrier layer and the stiffening layer can have a different material or consist of a different material.
- the carrier layer and the stiffening layer preferably have the same material or consist of the same material.
- the material of the carrier layer has the same coefficient of thermal expansion as the material of the stiffening layer.
- the material of the carrier layer can be selected in particular from the group consisting of polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyethersulfone (PES), polysulfone (PSU), polyimide (PI), polycarbonate (PC), polyethyleneimine (PEI) and combinations of at least two of the aforementioned polymers.
- PEN polyethylene naphthalate
- PET polyethylene terephthalate
- PES polyethersulfone
- PSU polysulfone
- PI polyimide
- PC polycarbonate
- PEI polyethyleneimine
- the material of the stiffening layer can be selected in particular from the group consisting of paper, polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyether sulfone (PES), polysulfone (PSU), polyimide (PI), polycarbonate (PC), polyethylene imine (PEI) and Combinations of at least two of the aforementioned polymers.
- PEN polyethylene naphthalate
- PET polyethylene terephthalate
- PES polyether sulfone
- PSU polysulfone
- PI polyimide
- PC polycarbonate
- PEI polyethylene imine
- Polyethylene naphthalate is particularly preferred as the material for the support layer and the stiffening layer.
- PET polyethylene terephthalate
- PET polyethylene terephthalate
- adhesion layer described in detail within the scope of the first aspect of the invention is preferably uncovered by the removal of the carrier layer and/or stiffening layer.
- the invention relates to a sensor unit.
- the sensor unit is set up to detect a physical measurement variable and convert it into an electrical measurement signal and is designed in the form of a layered sensor stack with a first section and a second section.
- the first section and the second section each have a plurality of functional layers, in particular arranged directly or not directly one on top of the other.
- the functional layers are applied, in particular printed, in layers covering one another at least in sections.
- the first section has at least the following functional layers: a first insulation layer that covers and electrically isolates the distal end of the medical instrument at least in sections, in particular only in sections or completely, i.e. continuously or contiguously, a first insulation layer that covers the first insulation layer at least in sections, in particular only in sections or completely , i.e. continuously or coherently applied, in particular printed, electrically conductive first electrode layer, a piezoactive piezo layer applied, in particular printed, at least in sections, in particular only in sections or completely, i.e. continuously or contiguously, on the first electrode layer, a piezoactive layer at least in sections, in particular only partially or completely, i.e.
- the second section has at least the following functional layers: an electrically insulating insulation layer covering the distal end of the medical instrument at least in sections, in particular only in sections or completely, ie continuously or contiguously, an electrically conductive first conductor track applied, in particular printed, at least in sections, in particular only in sections or completely, i.e. continuously or contiguously, to the insulation layer and an electrically conductive first conductor track applied, in particular printed, at least in sections, in particular only partially or completely, i.e. continuously or contiguously , electrically conductive second conductor track.
- FIG. 1 shows a schematic, partially cut-off perspective view of an embodiment of a medical instrument according to the invention in the area of a distal end
- FIG. 2 shows the medical instrument according to FIG. 1 in a schematically simplified cross-sectional view along section line II-II according to FIG. 1 ,
- FIGS. 1 and 2 shows the medical instrument according to FIGS. 1 and 2 in the region of the distal end in a partially cut, schematically simplified longitudinal section;
- FIGS. 1 to 3 schematically shows a first section of a sensor stack of the medical instrument according to FIGS. 1 to 3,
- FIG. 5 schematically shows a second section of a sensor stack of the medical instrument according to FIGS. 1 to 3 and
- FIG. 6 shows a further embodiment of a medical instrument according to the invention in a partially cut-off schematic side view, individual components being shown in a highly simplified schematic to clarify a basic structure.
- 1 schematically shows a medical instrument 1, for example in the form of a cannula.
- the medical instrument can only be seen in the area of a distal end, which is intended for insertion into a patient's body.
- the distal end 2 can be a cannula tip, for example, which has a puncture section 3 that is designed in a fundamentally known manner and ground at an angle.
- a proximal end that is not visible has a fundamentally known structure.
- the medical instrument 1 has a sensor unit 4 which is set up to detect a physical measurement variable and convert it into electrical measurement signals.
- the sensor unit 4 is arranged at the distal end 2 and is shown schematically in a highly simplified manner, in particular with reference to FIGS.
- the sensor unit 4 is in the form of an ultrasonic transducer, which is to be described in more detail below, which enables an ultrasonic-based localization of the tip 2 of the medical instrument 1 in the body of a patient.
- an ultrasonic transducer which is to be described in more detail below, which enables an ultrasonic-based localization of the tip 2 of the medical instrument 1 in the body of a patient.
- This makes it possible for medical staff to navigate the tip 2 in a therapeutic and/or diagnostic procedure in the patient's body, suitable ultrasound-based procedures for this being known in principle and also referred to as tracking. Tracking as such does not therefore need to be discussed in more detail at this point.
- the sensor unit is designed in the form of a sensor stack 4 constructed in layers.
- the sensor stack 4 has a first section 4a and a second section 4b.
- Section 4a which can also be referred to as the sensor section, preferably forms a distal section of the sensor stack 4.
- Section 4b which can also be referred to as the contacting section, preferably forms a proximal section of the sensor stack 4.
- first section 4a and the second section 4b are preferably arranged one behind the other, in particular directly one behind the other.
- the first section 4a and the second section 4b are particularly preferably formed in one piece.
- the first section 4a and the second section 4b can be formed separately from one another and connected to one another, in particular with a material bond.
- Section 4a and section 4b each have a plurality of functional layers arranged one on top of the other (cf. FIGS. 4 and 5).
- the functional layers are applied, in particular printed, in layers covering one another at least in sections.
- the sensor stack 4 is preferably produced by means of a printing process.
- screen, injection, dispensing and/or stamp printing techniques can be considered as printing methods for producing the sensor stack 4 .
- materials with corresponding electrical and/or electronic functional properties are printed using the printing process, starting from a liquid and/or pasty form.
- the functional layers are not shown to scale.
- suitable layer thicknesses reference is made to the general description. In order to achieve appropriate layer thicknesses, individual materials can be printed on top of one another several times in order to form one of the functional layers.
- the sensor stack 4 is applied, in particular printed, directly to a wall section 5 of the distal end 2 and is thus firmly connected to the distal end 2 .
- a separate application of a previously separately manufactured sensor stack can in particular be dispensed with, which significantly simplifies the manufacture of the medical instrument 1 .
- air inclusions between the wall section 5 and the sensor stack 4, as can occur, for example, when a sensor stack is otherwise conventionally glued on, are avoided.
- the first section 4a of the sensor stack 4 has a first insulation layer 6, which has an electrically insulating material or is formed from an electrically insulating material.
- the first insulating layer 6 is preferably printed directly onto the wall section 5 . Accordingly, the first insulation layer 6 preferably forms a bottom layer of the first section 4a.
- the first section 4a has a first electrode layer 7 printed onto the insulation layer 6, in particular directly.
- the first electrode layer 7 has an electrically conductive material or is formed from an electrically conductive material.
- the first section 4a has a piezoactive piezoelectric layer 9 printed onto the first electrode layer 7, in particular directly.
- the piezo layer 9 preferably converts ultrasonic pulses to be detected into corresponding electrical measurement signals in a manner that is known in principle. Accordingly, the piezo layer 9 preferably forms an actual ultrasonic transducer of the sensor stack 4, with the other functional layers serving, in contrast, for electrical insulation or signal dissipation, for example.
- the second section 4b has a second conductor track 18 printed in sections, in particular directly, on the insulation layer 16, the second conductor track 18 being printed on another section of the insulation layer 16, in particular directly.
- the second section 4b can have an anti-corrosion layer 19 .
- the anti-corrosion layer 19--as shown-- can be in the form of layer sections 19a, 19b and 19c which are formed separately from one another. Alternatively, the anti-corrosion layer 19 can also be formed in one piece.
- the anti-corrosion layer 19 is printed above the first conductor track 17 and the second conductor track 18 in relation to the layer thickness direction of the sensor stack 4 .
- the anti-corrosion layer 19 can, for example, have a material or consist of a material that is selected from the group consisting of carbon, noble metals, in particular gold and/or platinum, and combinations of at least two of the aforementioned materials.
- the medical instrument 1 in the present case has an approximately annular hollow cross section.
- the medical instrument 1 shown in FIG. 6 is partially cut off and shown in a greatly simplified side view.
- the medical instrument is preferably in the form of a cannula 1 .
- the medical instrument 1 has two sensor stacks. These sensor stacks 4 can either be printed directly onto the distal end 2 of the medical instrument 1 or printed separately and then applied to the distal end 2 . Otherwise, the structure of the functional layers of the sensor stacks 4 corresponds to the structure of the sensor stack 4 described above and shown in FIGS. With this type of arrangement, an ultrasound-based determination of an alignment of the distal end 2 can take place, for example. To put it simply, each of the two sensor stacks 4 can be “tracked” using methods that are known in principle, for example based on ultrasound. If the respective position of both sensor stacks 4 is known as a result, this allows direct conclusions to be drawn about the alignment of the distal end 2 .
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- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Mechanical Engineering (AREA)
- Human Computer Interaction (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022201953.9A DE102022201953A1 (de) | 2022-02-25 | 2022-02-25 | Medizinisches Instrument mit einem Sensorstack und Verfahren zur Herstellung eines solchen medizinischen Instruments |
| PCT/EP2023/053112 WO2023161027A1 (de) | 2022-02-25 | 2023-02-08 | Medizinisches instrument mit einem piezoelektrischen sensorstack und herstellungsverfahren dafür |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4483688A1 true EP4483688A1 (de) | 2025-01-01 |
Family
ID=85222381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23704331.0A Pending EP4483688A1 (de) | 2022-02-25 | 2023-02-08 | Medizinisches instrument mit einem piezoelektrischen sensorstack und herstellungsverfahren dafür |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250196188A1 (de) |
| EP (1) | EP4483688A1 (de) |
| JP (1) | JP2025506284A (de) |
| DE (1) | DE102022201953A1 (de) |
| WO (1) | WO2023161027A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012033837A2 (en) * | 2010-09-08 | 2012-03-15 | Micropen Technologies Corporation | Pressure sensing or force generating device |
| US10413940B2 (en) | 2015-07-21 | 2019-09-17 | Koninklijke Philips N.V. | Transducer laminate |
| DE102018220606A1 (de) | 2018-11-29 | 2020-06-04 | B. Braun Melsungen Ag | Medizinisches Instrument mit einem Sensorstack und Verfahren zur Herstellung eines solchen Sensorstacks |
| US12501833B2 (en) * | 2019-11-27 | 2025-12-16 | Fondazione Istituto Italiano Di Tecnologia | Flexible piezoelectric sensor with integrated electromagnetic shield |
-
2022
- 2022-02-25 DE DE102022201953.9A patent/DE102022201953A1/de active Pending
-
2023
- 2023-02-08 US US18/841,012 patent/US20250196188A1/en active Pending
- 2023-02-08 WO PCT/EP2023/053112 patent/WO2023161027A1/de not_active Ceased
- 2023-02-08 JP JP2024550339A patent/JP2025506284A/ja active Pending
- 2023-02-08 EP EP23704331.0A patent/EP4483688A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022201953A1 (de) | 2023-08-31 |
| WO2023161027A1 (de) | 2023-08-31 |
| JP2025506284A (ja) | 2025-03-07 |
| US20250196188A1 (en) | 2025-06-19 |
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