Classifications

• • 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
  • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
  • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
  • A61B3/16—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring intraocular pressure, e.g. tonometers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/02—Prostheses implantable into the body
  • A61F2/14—Eye parts, e.g. lenses or corneal implants; Artificial eyes
  • A61F2/16—Intraocular lenses

Definitions

• Device for measuring physical quantities in particular for measuring pressure in the eye
• the invention relates to a device according to the preamble of claim 1, as known from DE 197 28 069 Cl.
• the known device is used to measure the intraocular pressure and has a foldable implant on which a telemetric system with a pressure sensor and a transmitting device having a coil is provided outside the field of vision of the eye.
• a transmitting device information corresponding to the sensor signals can be passed on wirelessly to a receiving device arranged outside the eye.
• the information received is converted into reproducible data in an evaluation device connected to the receiving device.
• the remote measuring device that can be implanted in the eye can have a data logger in which the measurement data continuously supplied by the pressure sensor can be stored and from which the measurement data can be interrogated for a limited time when required in the transceiver mode.
• the object of the invention is to provide a device of the type mentioned which is foldable or rollable with excellent reception and transmission quality.
• a carrier foil insbesonde re ⁇ a carrier foil the coil in a flat surface in the form of a plurality of adjacent coil windings, planar applied.
• the remote measuring device containing the electronics and / or the sensor are preferably contained in at least one electronic component (chip) and are likewise applied to the coil on the foldable carrier with electrical contacting.
• This arrangement is cast into a foldable, biocompatible implant material, in particular made of polyorganosiloxane, for example polydimethylsiloxane.
• the implant material can serve not only as a covering for the transmitting device and remote measuring device, but also as a transmission medium for the physical quantity to be measured, which can be, in particular, the intraocular pressure or the temperature in the eye, towards the sensor.
• the sensor is also surrounded by the biocompatible implant material.
• the physical quantity to be measured in the eye for example the intraocular pressure or the temperature, then acts directly on the sensor surface or this sensor area. It is also possible to use a different transmission medium for the physical size than the implant material.
• planar design of the coil with a plurality of coil turns lying next to one another which preferably lies in a plane perpendicular to the optical axis of the eye or the implant designed as an intraocular lens, achieves high transmission and reception quality without the foldability or rollability of the Implant material is impaired. Furthermore, the required compatibility with the eye is achieved for the entire device. In addition to a planar layer, several planar layers (planes) lying one above the other can also be provided for the coil turns.
• the implant is preferably designed as an intraocular lens, the telemetry device and the transmitting device having the coil being accommodated outside the optical lens part, in particular essentially in the area of the feel of the intraocular lens which surrounds the optical lens part.
• the haptic can have an annular area surrounding the optical lens part, within which the planar arrangement of the coil turns is accommodated.
• the coil turns are preferably designed as planar electrical conductor tracks, which preferably consist of precious metal, in particular gold.
• the conductor tracks of the coil turns are produced on the carrier film using conventional planar technology, for example by metal deposition, in particular galvanic deposition, as are known in microstructuring processes.
• the implant can also have an annular design.
• the coil turns are then arranged on at least one of the ring surfaces.
• the ring-shaped implant is preferably fixed to the sulcus of the eye.
• the ring can be formed partly from a hard material, in particular PMMA and partly from a flexible material, in particular silicone.
• the implant is preferably covered with a biocompatible material, for example silicone rubber.
• the ring can also consist entirely of silicone, with a stabilizing haptic, in particular made of PMMA or another rigid material.
• the carrier film is formed as a thin flexible and foldable foil, which ensures a good adhesion of the metal of the coil turns, in particular the film mate rial ⁇ has dielectric properties and may be made of a suitable plastic, for example, consist of a polyimide.
• the device Due to the extreme rollability or foldability of the device, it can be operated without the usual minimally invasive surgical procedures.
• methods to be implanted in the eye can be implanted in the eye.
• microelectronic and sensory components for wireless energy and signal transmission for example in the form of an artificial intraocular lens that can be folded, can be applied to the eye. After the implantation, the intraocular lens unfolds.
• Figure 1 is a plan view of an embodiment designed as an intraocular lens
• FIG. 2 shows a top view of an embodiment for a telemetric system, which can be used in the embodiment shown in FIG. 1;
• FIG. 3 shows a sectional representation of the telemetric system shown in FIG. 2;
• Figure 4 is a sectional representation of a telemetric system see "of another embodiment
• Figure 5 shows an embodiment of a ring-shaped implant
• FIG. 6 shows a further exemplary embodiment for a ring-shaped implant with closed haptic loops
• Figure 7 shows an embodiment for a ring-shaped implant with open haptic loops.
• the illustrated embodiment of an eye implant 6 is designed as an intraocular lens. This has an optical lens part 1, which can be used in the visual area of the eye.
• the optical lens portion 8 has an opti cal ⁇ axis 10 which is substantially perpendicular to the Figure 1 ⁇ plane. In the implanted state, the optical axis is essentially extended to the visual axis of the eye. directed.
• the optical lens part 8 essentially covers the field of vision of the eye.
• a coil 1 which forms the inductance in the transmitting and receiving device.
• the coil is formed by planar coil turns 3, in the form of interconnects lying next to one another.
• the conductor tracks of the coil turns 3 lie next to one another in a plane running essentially perpendicular to the optical axis 10.
• the width of a coil turn is on the order of approximately 3 to 90 ⁇ m, preferably approximately 10 to 90 ⁇ m.
• About 10 to 65 coil turns can be provided in a respective plane for the coil 1.
• the foldability, rollability and possibly kinkability of the carrier film 2 remain unaffected by such a design of the coil 1.
• the coil turns 3 can be produced, for example, by galvanic deposition, as is known in the process of microstructuring.
• the coil 1 is on an annular surface.
• the coil can also be oval, oval-like or have another configuration.
• the carrier film 2 there is also the electronics of the telemetric system, which is accommodated in an electronic module (chip) 4, it also being possible, of course, to use several electronic modules.
• a sensor 5 for detecting the physical quantity to be measured, in particular the intraocular pressure, can preferably be provided on this electronic module 4 in an edge region.
• the electronic component 4 is contacted with the coil 1 in a suitable manner (electrical contacts 11).
• the coil turns 3 preferably run essentially in a straight line for easier contacting, as is shown in a straight line winding area 7 of FIG. 2.
• the electrical contact 11 between the coil 1 and the electronic component 4 can be achieved in hybrid or flip-chip technology by bonding.
• the electrical contact points 11 (FIG. 3) can be formed by gold bumps with a thickness of 30 ⁇ m and less.
• the chip or the electronic components can be incorporated into one or more foils and thus be foldable or rollable.
• the planar coil turns have a thickness (height) in the range from 5 to 60 ⁇ m.
• the height of the electronic component 4 is approximately 600 ⁇ m and can be significantly less, for example 300 ⁇ m.
• the area of the electronic module 4 is approximately 2.0 mm x 2.0 mm.
• the thickness of the carrier film can be approximately 8 ⁇ m.
• the coil can have an outer radius of approximately 5.15 mm and an inner radius of approximately 3.85 mm.
• the area t of the carrier film 2, which lies within the coil 1, can be punched out, so that the carrier film 2 is present as an annular carrier film which is essentially covered with the coil turns 3.
• FIG. 1 shows the intraocular lens into which the telemetric system shown in FIGS. 2 to 4 is cast.
• the dimensions given in FIG. 1 are exemplary details which can be varied within the limits permitted for an eye implantation.
• the coil 1 is located within an annular haptic area which concentrically surrounds the optical lens part 8. It can be a circular ring or an oval or oval-like ring.
• annular region 12 of the lens material lying between this annular haptic region and the optical lens part 8 is provided with elongated holes 9 which extend at their boundary edges approximately concentrically to the annular coil 1 and the annular region 12 about the optical axis 10. These elongated holes 9 not only facilitate the folding or rolling of the lens, but also support the fixation of the lens in the eye, since eye tissue can grow into these elongated holes. As can also be seen from FIG. 1, the sensor 5 is in the vicinity of the optical one
• Lens part 8 It lies between the optical lens part 8 and the inner edge of the coil 1 in an area which does not overlap the surface of the coil 1.
• the sensor 5 is enclosed by a lens material 9 ⁇ is located between two ends of the oblong holes in the annular portion 12 of the lens material.
• the lens material is used to transmit the physical quantity to be measured in the eye, for example the temperature or the intraocular pressure.
• a polyorganosiloxane, in particular polydimethylsiloxane, is preferably used for the lens material. It is also possible to provide another transmission medium in the area of the sensor 5 or a sensor area which responds to the physical variable (eg pressure, temperature) or to expose this area, as will be explained with reference to FIG. 4.
• the outside diameter of the intraocular lens may be about 12 mm or less e.g. B. 8.5 mm.
• the diameter of the optical lens part 8 can be 6 mm or less, for example 4.8 mm.
• the thickness of the lens in the center of the optical lens part 8 can be about 0.780 mm or less. In the non-optical area, the thickness can be 0.500 mm or less, but it is ensured in the area of the electronic assembly 4 that the lens material is completely enveloped and accordingly the lens has a corresponding thickness in this area.
• the length of the elongated holes 9 can be approximately 4.6 mm or less.
• the width can be 1.2 mm or less.
• the coil 1 and the electronic module 4 are on the same side of the carrier film 2.
• the coil 1 is on one side of the carrier film 2 and the electronic Module 4 on the other side of the carrier film 2.
• the electrical contact 11 between the coil 1 and the electronic module 4 takes place with the help of through contacts through the carrier film 2.
• an area of the sensor 5 that is sensitive to the physical variable to be detected can be exposed.
• it is a sensor surface 13.
• a recess can be provided in the carrier film 2.
• This recess is also in the enveloping implant or intraocular lens material.
• a material that transmits the physical size to be used in the recess as the implant material.
• the exposed sensor surface 13 is located on the inside of the sensor 5.
• the exposed sensor surface can also be on the other side, i.e. lie on the outside of the sensor 5.
• the implant or lens material by about mutually parallel folding edges 14 ⁇ can be folded or rolled, the both sides of the electronic module 4 lie. Even if the electronic component 4 consists of a non-foldable monolithic component, the implant cross-section for the implantation is considerably reduced. The two folded edges 14 run on both sides of the electronic module. Furthermore, the implant can also be folded along a fold edge 15 running through the center of the lens (optical axis 10). From this it can be seen that there are a large number of folding options for the implant, even if the electronic component 4 is monolithic. Due to the special design of the coil 1, it can be folded to achieve a high inductance.
• a memory can be provided in the electronic module 4, which stores the pressure values continuously recorded by the sensor, in particular pressure sensor 5. These pressure values can be called up from this memory from time to time, for example in a rotation of one week, and can be transmitted from the telemetry device to a receiving device (not shown) with a connected evaluation device, as described, for example, in German patent DE 197 28 069 C1. It is also possible for the electronic component 4 to be formed from foldable carrier material, so that the intraocular lens can be deformed to a small diameter and only a small incision has to be made on the eye for the implantation. The lens material is designed in such a way that it unfolds after the implantation and takes on the desired lens shape.
• an implant body 16 is of annular design.
• the recess provided in the ring interior is dimensioned at least so that it lies outside the field of view when the ring-shaped implant is arranged in the eye.
• the coil not shown, is designed as shown in FIG. 2 is shown. It is located on one or both surfaces of the annular implant.
• the sensor 5 and the electronic component 4 are connected in the same way as was explained in the previous exemplary embodiments.
• the sensor 5 is located within the annular arrangement of the coil 1, as can be seen from FIG. 2.
• the annular implant 16 consists of hard or rigid ring parts 17, preferably of PMMA, and of flexible ring parts 18, in particular of silicone. This makes it possible to fold the annular implant 16 about a folding axis laid through the flexible ring parts 18.
• the outer diameter of the ring is approximately 12 to 15 mm.
• the width of the ring can be 1 to 3 mm.
• the annular implant body 16 has closed haptic loops 19.
• the exemplary embodiment shown in FIG. 7 has open haptic loops 20.
• the annular implant bodies 16 in exemplary embodiments 6 and 7 are preferably made of silicone rubber.
• the haptic loops 19 and 20 are preferably made of a rigid material, in particular PMMA.
• 20 fixing holes 21 are provided in the open haptic loops. This provides a stable positio ⁇ discrimination of the implant body 16 ensures in mind.
• the exemplary embodiments in FIGS. 5 to 7 are suitable for fixation in the sulcus of the eye. If necessary, additional fixation holes, not shown, can also be provided in the exemplary embodiment in FIG. 5.
• FIGS. 5, 6 and 7 can be completely encased with a covering made of silicone rubber or another biocompatible covering.
• the intraocular pressure is transmitted to the sensor surface of the pressure sensor 5 via this flexible covering.
• the wrapping material forms the transmission medium of the intraocular pressure on the sensor surface of the sensor 5.

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

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7923221

Family Applications (1)

Country Status (7)

Cited By (10)

Families Citing this family (61)

Citations (5)

• 1999
  • 1999-09-24 DE DE19945879A patent/DE19945879C2/de not_active Expired - Fee Related
• 2000
  • 2000-09-22 WO PCT/EP2000/009301 patent/WO2001021063A1/de not_active Ceased
  • 2000-09-22 ES ES00964227T patent/ES2200938T3/es not_active Expired - Lifetime
  • 2000-09-22 DE DE50002477T patent/DE50002477D1/de not_active Expired - Lifetime
  • 2000-09-22 US US10/089,363 patent/US6796942B1/en not_active Expired - Fee Related
  • 2000-09-22 AT AT00964227T patent/ATE241932T1/de active
  • 2000-09-22 JP JP2001524497A patent/JP4251387B2/ja not_active Expired - Fee Related
  • 2000-09-22 EP EP00964227A patent/EP1213991B1/de not_active Expired - Lifetime

Patent Citations (5)

Non-Patent Citations (1)

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