EP1998670A1 - Dispositif, capteur, element de capteur et procede de mesure du trace de la colonne vertebrale et des changements du trace de la colonne vertebrale - Google Patents

Dispositif, capteur, element de capteur et procede de mesure du trace de la colonne vertebrale et des changements du trace de la colonne vertebrale

Info

Publication number
EP1998670A1
EP1998670A1 EP07726674A EP07726674A EP1998670A1 EP 1998670 A1 EP1998670 A1 EP 1998670A1 EP 07726674 A EP07726674 A EP 07726674A EP 07726674 A EP07726674 A EP 07726674A EP 1998670 A1 EP1998670 A1 EP 1998670A1
Authority
EP
European Patent Office
Prior art keywords
sensor
spine
freedom
light guide
light
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Withdrawn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
EP07726674A
Other languages
German (de)
English (en)
Inventor
Thomas Bierhoff
Dirk David Goldbeck
Tobias Happel
Hans-Jürgen SCHRAGE
Andreas Bausewein
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP1998670A1 publication Critical patent/EP1998670A1/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Withdrawn legal-status Critical Current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
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1116—Determining posture transitions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1077—Measuring of profiles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/1126—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb using a particular sensing technique
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4538—Evaluating a particular part of the muscoloskeletal system or a particular medical condition
    • A61B5/4566—Evaluating the spine
    • 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
    • A61B2562/0261—Strain gauges
    • A61B2562/0266—Optical strain gauges
    • 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
    • A61B2562/16—Details of sensor housings or probes; Details of structural supports for sensors
    • A61B2562/164—Details of sensor housings or probes; Details of structural supports for sensors the sensor is mounted in or on a conformable substrate or carrier
    • 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
    • A61B2562/187—Strain relief means
    • 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
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6823—Trunk, e.g., chest, back, abdomen, hip

Definitions

  • Device Sensor, sensor element and method for measuring the spinal column course and changes in the course of the spine
  • the invention relates to a device for measuring the spinal column profile, a sensor and a sensor element for such a device and a method for continuous measurement of the spinal column course.
  • An object of the invention is to provide an apparatus in which an improved measurement is made possible, as well as to provide a method for continuous measurement.
  • the object is achieved by a device for measuring the course of the spinal column according to the features of claim 1, a sensor for such a device according to the features of claim 8, a sensor element for such a sensor according to the features of claim 15 and a method for continuous measurement according to the features of claim 22. Further developments of the invention are represented by the dependent claims.
  • a first subject of the invention relates to a device for measuring the course of the spinal column, which comprises means for continuously measuring the course of the spinal column, as well as means for continuously measuring changes in the course of the spine during movement along the particular entire spine in all degrees of freedom of its deformation.
  • the device according to the invention allows a complete, continuous measurement of the spinal column profile in terms of lateral and dorsal direction as well as torsion both in static, stationary, as well as in dynamic, moving state.
  • the means for continuous measurement of the spinal column and the means for continuously measuring the changes in the spine during movement along the particular entire spine in all degrees of freedom of their deformation comprise at least one common, with respect to a deformation in the direction at least a Freedom ⁇ grads sensitive, at least one evaluation of the sensing part to be measured of the spine sensor, as well as connected to the sensor.
  • a sensor for detecting all degrees of freedom, or separate sensors for detecting one degree of freedom can be provided.
  • the continuous Ver both ⁇ measurement of the spinal curve, as well as the kontinuierli ⁇ che measurement of the course changes of the spinal column during loading movement along the particular entire spine in all degrees of freedom of its deformation with the same sensor, or the same sensors.
  • the sensor detects the spine not only yaku- ell, but, for example, extends over the entire part to be measured of the spine and so this ge ⁇ entire part is to detect particular with regard to the course changes in the situation.
  • the spine is divided into discrete sections it is understood ⁇ , it being detected by the preferably along the spinal column extending sensor relative movements between the individual sections in the direction of all degrees of freedom.
  • the effort for attaching suitable means for continuously measuring the course of the spinal column and changes in the course of the spinal column as well as for evaluating the sensor data obtained is kept to a manageable level small. Due to the small number of individual sensors, an effective, continuous measurement of the spinal column at rest, as well as a measurement of the changes in the spine during movement, since posture and movement of a spine to be measured is not, or as little as possible limited ,
  • the Minim with respect to a deformation ⁇ comprises least in the direction of one degree of freedom sensitive sensor min ⁇ least one over at least a part to be measured of the spine extending at least one with respect to a deformation in the direction of at least one degree of freedom of bending-sensitive zone having optical fiber, at least a at a first end of the light guide is a constant light power ⁇ irradiating light source, and at least one incoming at a second end of the light guide light ⁇ power measuring receiver, wherein the receiver is connected to the evaluation unit.
  • optical light guides are provided which, for example, by partial geometric changes in the core-sheath transition, which act as a fault, for example, as a disturbance bending of the optical fiber, are bending-sensitive.
  • the range of a light guide with such, for example, in the core-sheath transition arranged change is referred to as sensitive or bending sensitive ⁇ tive zone.
  • Is a constant light output is irradiated to a light guide having a bending-sensitive zone of the optical waveguide at the first end for example by means of an LED (Light Emitting Diode) or a laser light source such as a laser diode, and is measured the light output at the second end, for example by means of a Photodi ⁇ or a phototransistor, the light output measured at the second end changes as a function of the bending of the light guide in the region of the sensitive zone.
  • LED Light Emitting Diode
  • a laser light source such as a laser diode
  • the measured data into a graphical representation of the spinal curve under Be ⁇ allow consideration of all degrees of freedom of the course change Ü berformation.
  • Optical waveguides with bend-sensitive zones can be arranged along the entire spinal column in contrast to conventional sensors.
  • the course of the spinal column can be measured continuously, just as changes in the course of the spine during movement along the particular entire spine can be measured in all degrees of freedom of its deformation.
  • constant light output in the context of the present invention means that the light power radiated into the light guide at the time of measurement is unchangeable, so that the light power lost in the area of the bending-sensitive zones can be qualitatively determined by measuring the incoming light power, or the incoming light output directly represents a measure of the proportion of the light output lost in the bending-sensitive zone. It is irrelevant whether the constant light output is continuously, ie non-stop, or pulsed at discrete points in time, to each of which a measurement is made, is irradiated into the light guide.
  • the senor is un ⁇ divided into several sections. Each section comprises at least one at least one in respect to a deformation in the direction min ⁇ least one degree of freedom bending-sensitive zone having light guides for the continuous measurement of the spinal column and gradient of the course changes of the spine within the respective portion and / or adjacent Abschnit ⁇ te time.
  • Such a sensor can be produced with little effort from a plurality of similar sensor elements, each of which comprises an optical waveguide with a bending-sensitive zone, in any desired length.
  • the sections are preferably consecutive at least at a distance of adjacent vertebrae of a spinal column, or arranged directly following one another.
  • the eddy ⁇ column is movable only between the vertebrae, the vertebrae themselves are rigid. By the sections being arranged in the spacing of the vertebrae, it is ensured to a sufficient extent that any movement of the spine, which movements from relative ⁇ composed between adjacent vertebrae ER, can be touched.
  • three light guides are provided, each with Minim ⁇ least a bending-sensitive area per section.
  • an optical waveguide having at least one bending-sensitive zone is provided within the section for measuring in each case one of the degrees of freedom of lateral and dorsal movement and torsion. It is much easier to provide bend-sensitive zones on a light guide that are sensitive to one degree of freedom than to make a bend-sensitive zone that is sensitive to several or all degrees of freedom.
  • a second object of the invention relates to a sensor for continuous measurement of the spinal column course and of course changes in the spine when moving along the entire spine in all degrees of freedom of its deformation.
  • the sensor comprises at least one part which extends over at least one part of the spinal column to be measured and at least one with respect to a deformation
  • Optical waveguides with bend-sensitive zones can be arranged along the entire spinal column in contrast to conventional sensors. Characterized the course of the spinal column can be measured continuously, as well as changes in the course of the spinal column during movement along the entire spinal column, in particular in all free ⁇ standardize their degrees of deformation can be measured.
  • the sensor may comprise a plurality of immediately or at least at a distance of adjacent vertebrae of a spine arranged successively ⁇ sensor elements which are each provided for continuous measurement of the spinal column history and changes in the spine within a section formed by the respective sensor element, or between adjacent sections ,
  • Each of the sensor elements comprises at least one at least one with respect to a deformation in the direction of at least one Liberty ⁇ degree bending-sensitive zone having optical fibers.
  • a light source irradiating a constant light output at a first end of the respective light guide is provided for each light guide, and at least one receiver measuring the light output arriving at a second end of the respective light guide is provided.
  • the sensor elements on a common, at least within the mobility of the entire vortex ⁇ column in all their degrees of freedom of their deformation elas- table stretchable strip-shaped carrier material arranged.
  • foam or plaster are suitable as expandable carrier material.
  • the light guides of the sensor or of the sensor elements can follow an elastic expansion of the carrier material, the light guides are arranged, for example meandering on the carrier material. It is also conceivable to obtain a longitudinal flexibility by the light guides are fixed in sections on tensile but flexible support plates, which in turn are arranged on the strip-shaped carrier material. Between the carrier plates, the light guides extend in arcuate stretch loops.
  • a sensor constructed in the following will also be referred to as a sensor band.
  • the sensor may comprise suitable means for protection against destruction by overstretching of the strip-shaped carrier material.
  • suitable means may, for example, be tension straps arranged on both sides of the longitudinal sides of the strip-shaped carrier material, which straighten up on a definable elongation of the carrier material and thus prevent a further stretching of the carrier material.
  • a third object of the invention relates to a Sensorele ⁇ ment for use in a sensor described above.
  • An inventive sensor element comprises at least one over a part of the extending spine to be measured, at least one with respect to a deformation in the direction of at least one degree of freedom of bending-sensitive zone aufwei ⁇ send light guides.
  • a light guide is in each case each degree of freedom are provided, each light guide Minim ⁇ each comprises a least designed for a deformation in the direction of the jewei ⁇ then degree of freedom of bending-sensitive zone.
  • a suitable combination of optical fibers with sensitive zones designed for the measurement of a specific degree of freedom produces a total of a sensor element which enables the measurement of changes in the course of the degrees of freedom which are possible for a spinal column.
  • a sensor element for measuring a spinal column is preferably provided for the degrees of freedom dorsal and lateral movement and torsion and comprises a total of three optical fibers each having at least one bending-sensitive zone designed for measuring the respective degree of freedom. If the sensitive zones of the combined light guides of the sensor element extend over the same sections along the spine, then a change in course in this section can be measured with respect to all the degrees of freedom considered.
  • the bending-sensitive zones of a light guide of a Sensorele ⁇ ment can be formed for example by partial geometric Ver ⁇ changes in the core-sheath transition.
  • the physical principle used here is that the partial perturbation of the light guide in the core-cladding transition causes a loss of light output in the light guide in the sensitive zone caused. Amplifies a bending of the optical fiber in the region of the sen ⁇ sitiven zone or reduces the loss of light ⁇ performance.
  • the partial geometric changes in the core-sheath transition can be produced, for example, by mechanical processing of the optical waveguide in the region of its core-sheath transition.
  • the partial geometric changes may include, for example, depending on the bending of the light guide, the scattering ⁇ and reflection behavior in the interior of the light guide affecting notches in the core-sheath transition.
  • a fourth subject of the invention relates to a method for the continuous measurement of the spinal column profile. such as the course changes of the spine when moving along the entire spine in all degrees of freedom of its deformation.
  • the inventive method comprises the Ver ⁇ method steps: - arranging at least one light guide having at least one in respect to at least one bending-sensitive zone to be measured degree of freedom along the spine,
  • the spinal column In order to arrange the at least one light guide with Minim ⁇ least a bending-sensitive zone along the spinal column is conceivable, first, the spinal column to be divided into several be measured portions, and then each a min ⁇ least one light guide having at least one broad for a sensitive be measured degree of freedom zone Sen ⁇ sorelement per section along the spine to arrange.
  • a number of light guides corresponding to at least the number of sections can be fastened on a carrier strip, the individual light guides each having at least one bend-sensitive zone in a specific section, and then to fasten the carrier tape together with the optical fibers arranged thereon along the spine to be measured.
  • three light guides each for measuring a degree of freedom within a section are each provided.
  • the bending-sensitive zones of the light guides in the respective sections are preferably produced by mechanical processing of the light guides.
  • the deformation of the spinal column is determined discretely by comparing the incoming light output with the irradiated light power and detects the deformations thus determined and stores them for later evaluation over a specific period of time.
  • 1 is a schematic representation of the effect of a partial geometric change of a light guide in its core-sheath transition on the change in the transmitted light power at bending
  • Fig. 3 is a schematic representation of the light guide is achieved an elastically stretchable strip-shaped carrier material comprehensive sensor, wherein a longitudinal flexibility of the sensor band voltage through a meandering Anord ⁇ ,
  • Fig. 4 is a schematic representation of an elastically stretchable strip-shaped carrier material comprise ⁇ the sensor, wherein a longitudinal flexibility of the sensor strip is achieved by expansion loops in parallel arrangement of the light guide,
  • FIG. 5 is a schematic representation of a configuration of sensitive zones on optical fibers
  • Fig. 6 is a schematic representation of a section ei ⁇ nes with means for protection against longitudinal Ü berdehnung equipped sensor strip
  • Fig. 7 is a schematic representation of a device equipped with means for protection against pressure loading sensor band, as well
  • Fig. 8 is a schematic representation of a sensor strip, which is protected by a protective layer against mechanical loads ⁇ rule.
  • a main aspect of the present invention is to continuously measure a course of the course as well as changes in the course of a spinal column in a resting as well as in a moving state. consistently in all their degrees of freedom of movement by means of a suitable device to perform.
  • a device is provided for this purpose which comprises means preferably in the form of suitable sensors both for continuous measurement of the spinal column course and for continuous measurement of changes in the course of the spinal column during movement along the entire spinal column in all degrees of freedom of its deformation.
  • a sensor optical waveguide 1 As a sensor optical waveguide 1 are provided, which, as shown in Fig. 1 by partial geometric changes 5 in the core-cladding transition, which affect the transmission behavior of light as a disturbance, bending-sensitive.
  • the region of a light guide 1 with such a change 5 in the core-sheath transition is referred to as the sensitive zone 4.
  • a constant light output is radiated at a first end of a light guide 1 with a sensitive zone 4, for example with an LED or a laser diode, and at a second end the incoming light power is transmitted, for example measured photodiode or a phototransistor, the light output measured at the second end changes in response to the bending of the optical fiber 1 in the sensi ⁇ tive zone 4.
  • the partial disturbance 5 of the optical fiber 1 in the transition between the core 3 and 2 causes a loss of the light power in the optical waveguide 1 in the sensitive zone 4.
  • Fig. Ia shows the optical fiber 1 in the stretched state.
  • any change in the course of the light guide in the region of the sensitive zone can be determined by measuring the changing light output.
  • Measurable changes in the course of the light guide are (FIG. 2): the so-called dorsal movement, which includes a vertical bend in both directions (FIG. 2 a), torsion (FIG. 2 b), and the so-called lateral movement, which is a horizon ⁇ tale bending in both directions (Figure 2c).
  • the senor In order to be able to record the course and course changes of a spine in all degrees of freedom of its movement, the sensor extends at least over the part of the spine to be measured.
  • the sensor is sections divided into a plurality From ⁇ , each section at least one at least one with respect to a deformation in the direction min ⁇ least one degree of freedom bending-sensitive zone having light guides for the continuous measurement of the spine curve and of-course changes of the spine within the respective portion or includes across adjacent sections.
  • the determination and differentiation of the course changes and their expression in a specific section of the light guide requires for each one to be considered degree of freedom of the course change a light guide with a sensitive zone of appropriate nature.
  • a sensor element is produced in total which makes it possible to measure the course change in the three degrees of freedom considered here. If the sensitive zones of the combined light guides extend over the same sections along the sensor element, then a change in course in this section can be measured with respect to all the degrees of freedom considered.
  • three light guides each having at least one bend-sensitive zone are arranged per section, wherein an optical waveguide having at least one bend-sensitive zone is provided within the section for measuring one of the degrees of freedom lateral and dorsal movement and torsion.
  • the measurement data from the sensitive zones of the interlinked sensor elements in a graphical representation of the sensor history, taking into account all ⁇ have degrees of freedom in the course of change convict.
  • the spine is in several to be measured, through the sensor elements subdivided predetermined sections, each section in ⁇ can be measured individually by a separate sensor element on the respective sensitive zones in all directions of movement.
  • a corresponding sensor For producing a corresponding sensor is attached to a corresponding number of optical fibers preferably parallel or in a meandering course on a group consisting of a strip-shaped carrier material carrier tape and each column made sensitive to bending by mechanical processing in a specific portion along the vortex ⁇ .
  • one light guide per section is provided for each movement direction, corresponding to three light guides per section, and machined in this section correspondingly mechanically on its surface.
  • the carrier tape having arranged thereon, the sensi tive by ⁇ zones partially bending-sensitive optical fibers is fixed with suitable bonding materials, such as a tape or a patch on the back of a patient's spine.
  • the optical fibers guided on the carrier tape are coupled to transmitting and receiving components, such as LEDs and photodiodes.
  • Transmitter and receiver components are located in an opaque housing.
  • a continuous dynamogram of the spinal column can be be recorded and graphically displayed over a period of time to be determined.
  • Period may be used by a treating therapist or physician as a key decision-making aid in determining appropriate preventive and therapeutic measures for the patient.
  • the sensitive zones to the light conductors have different configurations, ie the surfaces of the light guides of the sensor in different ways, for example, be machined.
  • the sensitive zones to the light conductors have different configurations, ie the surfaces of the light guides of the sensor in different ways, for example, be machined.
  • the optical waveguides 29 are laid meandering on a stretchable, strip-like carrier material 6 and selectively fixed in such a way that the subsequently unfixed optical waveguide sections between the possible fixing points 7 at the edge of the carrier material 6 or the fixing points 8 in the longitudinal axis of the carrier material 6 change their position upon elongation of the carrier material 6 and thus follow the expansion movement of the carrier material 6, without being exposed to a mechanical stress or load which could affect the transmission behavior of the optical waveguides 29.
  • the sensitive zones are introduced or arranged at suitable, unfixed points of the light guide 29, depending on the type of movement to be detected.
  • FIG. 4 On a stretchable, strip-shaped carrier material 6 are shown in FIG. 4 sections support plates 13 of tensile, but flexible material, such as a plastic such as PET or Mylar foil fixed at a fixed distance from each other.
  • the light guides 30 are fixed on the carrier plates 13 in a suitable manner. The fixing takes place by fixing the Lichtlei ⁇ ter at the fixing points 11. In the region of the distances between the support plates 13, the light guides 30 are placed in Dehnsch secured 12.
  • the sensitive zones of the optical waveguides 30 are located in each case in the areas of the tension-resistant carrier plates 13, since only the type of movement, but not the expansion of the sensor band 10, should influence the sensitive zone of the optical waveguide 30.
  • the stretchable carrier material 6 absorbs the longitudinal Werbe ⁇ load on the sensor belt 10. In this case, the optical waveguide 30 fastened to the carrier plates 13 is not stretched, but adapted to the longitudinal extension of the sensor band 10 by changing the bending radius in the expansion loop 12.
  • Sensor tape 9 (Fig. 3), as well as for the sensor tape 10 (Fig. 4), for example, foam or plaster.
  • the fixing of the light guides 29, 30 at the fixing points 7, 8, 11 can be effected for example by suitable adhesives or polymeric casting materials.
  • the sensitive zones of the light guides must be mechanically processed according to one of the three types of movement to be determined dorsal movement, lateral movement, torsion (Fig. 5).
  • a three light guides 14, 15, 16 comprising optical fiber bundle 17
  • the optical fiber bundle 17 is arranged, for example, on a stretchable, strip-shaped carrier material 6.
  • Such a fiber optic bundle 17 or its sensitive zones more comprehensive Section of the carrier material 6 corresponds to a Sen ⁇ sorelement.
  • a dorsal movement A takes place in the vertical plane of the sensor band.
  • surface treatments in the form of partial geometric changes in the region of the core-sheath transition of the light guide 14 at a circumferential position on the top o laid light conductor 14 executed.
  • the symbol D indicates a treatment of a light guide on its upper side o, so that a par ⁇ tielle geometric change arises at the top o.
  • the symbol E indicates a treatment of a light guide on its underside u, so that on its underside u a partial geometric change arises.
  • the symbol F indicates a treatment of the light guide at its sides s, so that on its sides s a partial geometric change arises.
  • the ent ⁇ speaking circumferential positions are shown on the right of each symbol in detail again.
  • a conceivable solution for a sensor strip 31 protected against overstretching is to fix the light guides 18 selectively on fixing points 20 on the webs 19 on webs 19 made of a solid material, such as a plastic, as shown in FIG.
  • the webs 19 are interconnected, for example, with drawstrings 21 arranged on both sides, whereby a limitation of the longitudinal extent of the stretchable strip-shaped carrier material 6 is achieved.
  • the light guide 18 is thereby protected against mechanical tensile load, which can lead to a change in the optical transmission behavior and thus falsification of the sensor signal.
  • Another way to protect the optical fiber 18 against longitudinal overstretching is to use a flexible substrate 6 with a limited extent.
  • optical fibers of the sensor band attached to the back must be protected against mechanical stresses and damage that would influence or disturb the sensor signal.
  • a fiber optic bundle 24 comprising loops 25 of a solid material which fix the fiber optic bundle 24 to a stretchable, strip-like carrier material 6 is protected against mechanical stresses such as pressure.
  • the protective layer 27 may be made of the same material as the carrier material 6, for example.
  • the protective layer 27 is attached to the substrate 6 beispielswei ⁇ se by gluing so that the optical fiber 28 between the substrate 6 and the protective layer 27 are completely embedded.
  • Support material 6 and protective layer 27 are stretchable and compressible to the same extent. Instead of single
  • Optical fiber can also be arranged under the protective layer 27 one or more optical fiber bundles.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Dentistry (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Physiology (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Rheumatology (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention concerne un dispositif de mesure du tracé de la colonne vertébrale, comprenant un moyen (9) de mesure en continu du tracé de la colonne vertébrale, ainsi qu'un moyen de mesure en continu des changements du tracé de la colonne vertébrale par des mouvements le long de l'ensemble de la colonne vertébrale, avec une déformation d'un degré de liberté quelconque. L'invention concerne également un capteur destiné à une utilisation dans un tel dispositif, un élément de capteur pour un tel capteur, ainsi qu'un procédé de mesure en continu du tracé de la colonne vertébrale et des changements du tracé de la colonne vertébrale par des mouvements le long de l'ensemble de la colonne vertébrale, avec une déformation d'un degré de liberté quelconque.
EP07726674A 2006-03-27 2007-03-07 Dispositif, capteur, element de capteur et procede de mesure du trace de la colonne vertebrale et des changements du trace de la colonne vertebrale Withdrawn EP1998670A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102006014379 2006-03-27
DE102006028506 2006-06-21
DE102006045138A DE102006045138A1 (de) 2006-03-27 2006-09-25 Vorrichtung, Sensor, Sensorelement sowie Verfahren zur Vermessung des Wirbelsäulenverlaufs und von Verlaufsänderungen der Wirbelsäule
PCT/EP2007/052116 WO2007110300A1 (fr) 2006-03-27 2007-03-07 Dispositif, capteur, element de capteur et procede de mesure du trace de la colonne vertebrale et des changements du trace de la colonne vertebrale

Publications (1)

Publication Number Publication Date
EP1998670A1 true EP1998670A1 (fr) 2008-12-10

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EP07726674A Withdrawn EP1998670A1 (fr) 2006-03-27 2007-03-07 Dispositif, capteur, element de capteur et procede de mesure du trace de la colonne vertebrale et des changements du trace de la colonne vertebrale

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US (1) US8241231B2 (fr)
EP (1) EP1998670A1 (fr)
DE (1) DE102006045138A1 (fr)
WO (1) WO2007110300A1 (fr)

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US8241231B2 (en) 2012-08-14
WO2007110300A1 (fr) 2007-10-04
DE102006045138A1 (de) 2007-11-15
US20090234250A1 (en) 2009-09-17

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