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WO2010006608A1 - Suivi de surfaces ou de volumes d'objets dynamiques - Google Patents

Suivi de surfaces ou de volumes d'objets dynamiques Download PDF

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Publication number
WO2010006608A1
WO2010006608A1 PCT/DK2009/000172 DK2009000172W WO2010006608A1 WO 2010006608 A1 WO2010006608 A1 WO 2010006608A1 DK 2009000172 W DK2009000172 W DK 2009000172W WO 2010006608 A1 WO2010006608 A1 WO 2010006608A1
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WO
WIPO (PCT)
Prior art keywords
magnetic field
field generating
generating elements
magnetic
generating element
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.)
Ceased
Application number
PCT/DK2009/000172
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English (en)
Inventor
Hans Jørgen PEDERSEN
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Danfoss AS
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Danfoss AS
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Filing date
Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Publication of WO2010006608A1 publication Critical patent/WO2010006608A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring 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 or mobility of a limb
    • A61B5/1107—Measuring contraction of parts of the body, e.g. organ or muscle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring 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 or mobility of a limb
    • A61B5/1126—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb using a particular sensing technique
    • A61B5/1127—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb using a particular sensing technique using markers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/42—Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems
    • A61B5/4222—Evaluating particular parts, e.g. particular organs
    • A61B5/4238—Evaluating particular parts, e.g. particular organs stomach
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2503/00—Evaluating a particular growth phase or type of persons or animals
    • A61B2503/40—Animals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
    • A61B5/6871—Stomach
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
    • A61B5/6874—Bladder

Definitions

  • a system is described to track changes of the volumes or cross-sectional areas of objects, preferably hollow objects, by tracking the positions of magnetic field generating elements.
  • the system is particularly for in-vivo systems where the objects would be hollow organs, such as the bladder and the stomach.
  • One example is for people having urinary incontinence which is the accidental leakage of urine. At different ages, males and females have different risks of developing it.
  • the urinary bladder is a temporary storage reservoir for urine. It comprises an opening into the urethra, being the final passageway for the flow of urine to the outside. A band of the detrusor muscle encircles this opening to form the internal urethral sphincter.
  • Another sphincter, the external urethral sphincter is a skeletal (voluntary) muscle and encircles the urethra where it goes through the pelvic floor. These two sphincters control the flow of urine through the urethra. When these sphincters fail to work properly, it may lead to urinary incontinence.
  • One possible treatment is to introduce an artificial sphincter, an implanted device that keeps the urethra closed until you are ready to urinate.
  • the device often has three parts: a cuff that fits around the urethra, a small balloon reservoir placed in the abdomen, and a pump placed in the scrotum.
  • the cuff is filled with liquid that makes it fit tightly around the urethra to prevent urine from leaking.
  • your bladder is empty, the cuff automatically refills in the next minutes to keep the urethra tightly closed.
  • a collar containing variable viscosity fluid surrounds a portion of an anatomical conduit.
  • the flow of bodily fluids through the anatomical conduit occurs according to the viscosity level of the variable viscosity fluid.
  • Electro-rheologic fluid in the collar liquefies in the absence of an electrical potential difference to render the collar pliable, permitting the anatomical conduit to expand and fluid to flow through the anatomical conduit.
  • Electro-rheologic fluid in the collar solidifies in the presence of an electrical potential difference to render the collar firm, restricting the anatomical conduit from expanding and restricting fluid from passing through the anatomical conduit.
  • a control unit, or battery operable in response to sensed pressure data or according to an external control unit manipulated by a patient, determines when an electrical potential difference is generated to change the state of the electro-rheologic fluid in the collar.
  • Magneto-rheologic fluids can instead be used in the collar.
  • An implanted or external control unit, or other magnetic source determines when a magnetic field is generated to change the state of the magneto-rheologic fluid in the collar based on sensed pressure data or according to an external control unit operated by the patient.
  • a pressure sensor is provided in the anatomical conduit or organ to be emptied through the anatomical conduit upstream of the collar.
  • the sensor can be a wireless sensor that communicates with the implanted control unit, battery, or magnetic field generator as the case may be, or the sensor can be a wired sensor physically connected to the implanted control unit, battery, or magnetic field generator. Regulation of the collar and the state of the variable viscosity fluid contained therein by the generation of the electric or magnetic field, is thus determined by data sensed by the pressure sensor or by operation of the external control unit by the patient.
  • a magnetic device for the treatment of obesity, and specifically, for restricting the medically effective volume of a stomach.
  • the magnetic device comprises a magnetic bar for placement around the gastric wall and biased to create two stomach portions. The first portion of the stomach is for the primary digestion of ingested food, while the second portion of the stomach is bypassed in the digestive process.
  • a device is provided for restricting the capacity of a stomach and forming a gastric evacuation channel. The device comprises a magnetic body positioned on the external wall of a stomach from the superior surface of the stomach to the inferior surface of the stomach.
  • the device may further comprise a subcutaneous balloon port for regulating the volume of a balloon pouch situated adjacent to the external wall of the stomach, and a plurality of adhesive bands for enhancing the stabilization of the device.
  • a system for automatically reducing the capacity of a stomach upon the ingestion of food.
  • the system comprises a device for restricting the capacity of the stomach, a sensor for sensing the ingestion of food, and a power supply.
  • the sensor is capable of electronically communicating with the device, such that the device may shift between an open position wherein the stomach is not constricted and a closed position wherein the stomach is compressed into two sections.
  • a method is provided for placing the magnetic bar around the gastric wall to result in a decreased medically effective volume of a stomach.
  • FIGS. IA and IB show two views of an embodiment of a gastric remodeling device.
  • the gastric remodeling device 10 avoids the nutritional deficiencies observed with Malabsorptive Procedures, does not require sutures or staples that could lead to dehiscence (e.g., the opening of the suture site) or fistula (e.g., an abnormal connection between organs or intestines), and produces a significant amount of regurgitation and vomiting.
  • the gastric remodeling device 10 is comprised of a first magnetic bar 12 and a second magnetic bar 14. Each of the magnetic bars 12, 14 comprises a proximate end 18 and a distal end 20.
  • the first and second magnetic bars 12, 14 may be comprised of any permanent magnet material known in the art and may be flexible, semi-flexible, or articulated. In one embodiment, the first and second magnetic bars 12, 14 each comprise a thin, smooth, ferromagnetic bar. The first and second magnetic bars 12, 14 may be configured in any shape so long as both of the first and second magnetic bars 12, 14 easily conform to the side of a stomach. In one embodiment, both the first magnetic bar 12 and the second magnetic bar 14 each comprise an identical sigmoid-like shape and are disposed in a mating, mirror image relationship to each other. The first magnetic bar 12 and the second magnetic bar 14 are polarized such that the first magnetic bar 12 and the second magnetic bar 14 are biased towards each other.
  • the first and second magnetic bars 12, 14 are capable of magnetically engaging.
  • the two magnetic bars 12, 14 form a single unit that is magnetically secured to any tissue compressed therebetween.
  • the proximate end 18 of the first magnetic bar 12 magnetically and mechanically engages with the proximate end 18 of the second magnetic bar 14, such that the two magnetic bars 12, 14 are hingedly coupled and define an apex 16, an angle theta, and an interior space.
  • the interior space comprises a width A.
  • the gastric remodeling device 10 is configured as a V-shape.
  • an access port locator system for adjustable gastric bands includes an access port with an RFID tag with its antenna adjacent to the receiving portion of the port.
  • the system includes a locator with radio frequency transmitter/receiver circuitry for sending read or interrogation signals to the RFID tag and for sending write signals to the tag to write treatment data to memory of the RFID tag.
  • the locator also includes an antenna array with four patch antenna arranged in pairs to model two monopulse radar antenna systems.
  • the locator also includes processor(s) and logic modules/circuitry for processing the tag response signals received by the antenna array to determine location information for the RFID tag and associated port, i.e., to identify the center of the port relative to the antennae array or array face such as with strength and direction information relative to the array face.
  • the document US 2006/0252982 therefore describes an implantable artificial sphincter system providing long-term adjustment via transcutaneous energy transfer (TET), minimizing invasive adjustment through adding or removing fluid via a syringe.
  • An infuser device provides bi-directional fluid transfer via a flexible conduit to a sphincter band, such as a gastric band.
  • Materials are nonferrous and nonmagnetic so as to be magnetic resonance imaging (MRI) safe, being substantially immune to strong magnetic fields and not introducing an electromagnetic interference/compatibility (EMIC) hazard.
  • MRI magnetic resonance imaging
  • EMIC electromagnetic interference/compatibility
  • An additional gastric method of the gastric banding is to establish a gastric bypass from the small stomach pouch formed by the band to the gastrointestinal-tract.
  • this might lead to a lack of vital vitamins.
  • using a measurement of the volume of the small stomach pouch formed by the band would give the possibility to 'shut off' the bypass.
  • the present invention introduces a method for continuous tracking of volumes or areas, by tracking the positions of magnetic field generating devices, where there is no need for introducing substances, such as radiating substances, into the body. This both makes the measuring cheaper and easier, and increases the general comfort of a patient.
  • the system may include a device 40 having a sensor, e.g., an imager 46, one or more illumination sources 42, a power source 45, a magnetic unit 44 and a transmitter/receiver 41.
  • device 40 may be implemented using a swallowable capsule, but other sorts of devices or suitable implementations may be used. Outside a patient's body may be, for example, an external receiver/recorder 12 (including, or operatively associated with, for example, one or more antennas, or an antenna array), a storage unit 19, a processor 14, and a monitor 18. In some embodiments, for example, processor 14, storage unit 19 and/or monitor 18 may be implemented as a workstation, e.g., a computer or a computing platform. Further, the device 40 may include magnetic unit 44 which may include a magnetic field generator, for example, a conductive coil 49, a plurality of conductive coils 49, a permanent magnet, a plurality of permanent magnets, or any other magnetic field generator.
  • a magnetic field generator for example, a conductive coil 49, a plurality of conductive coils 49, a permanent magnet, a plurality of permanent magnets, or any other magnetic field generator.
  • the magnetic field unit may include a conductive coil, a current source or a power source that may be operativeiy connected to the conductive coil and a control unit which may be a switch or a controller to control the magnetic field generator.
  • the power source may be included in magnetic unit 44, power source 45 or an external power source.
  • magnetic unit 44 may include three mutually perpendicular coils, each may generate a magnetic field at a different time while receiver 12 may include at least three receiving antennas, for example, three mutually perpendicular coils. Based on the difference in the power received in each receiving antenna the position of the transmitting antennas may be determined.
  • one coil may be included in magnetic unit 44 and three or more receiving antennas may be located outside the body in order to acquire a three-dimensional position.
  • coils located outside the body may be used as the generating magnetic field antennas while coils located in magnetic unit 44 may be used as the receiving antennas.
  • the magnetic unit may be used as a voltage source for other units or elements in device 40, for example, a conductive coil and a voltage source may be used as power source for illumination source 42, optical system 50 or any other unit or electrical circuit in device 40.
  • an AC current flows through the conductive coil.
  • the AC current may be low frequency, for example in a range of 0.5-5 Miz.
  • the AC current may generate a magnetic field which may be used for determining the position of device 40.
  • Other frequencies may be used.
  • voltage or current may be applied to one or more coils, for example, selectively, at pre-defined time intervals, substantially continuously, at one or more pre-defined time(s), on demand, in response to a remote instruction, in response to an external instruction, or the like.
  • voltage or current may be applied to one or more coils to generate magnetic fields simultaneously but with different frequencies.
  • the predefined times may be, for example, after each transmitted video frame.
  • None of these cited systems possesses the ability to survey the expanding or decreasing surfaces of objects, and especially in the case of in-vivo implants, they lack the ability to calibrate the system without having to do surgery.
  • contrast markers can be located in images generated by an external imaging device, and may be such as to emit, or magnetic fields.
  • the contrast markers can be used for locating regions of interest in a heart and their relative motion.
  • the contrast markers are elements being attached in the body as individual elements, making them more combersom to fix to an object. Further, the document the document does not disclose using the markers directly to measure a changing cross-area or volume.
  • the object of this invention is predominantly to overcome these lacks.
  • the object of this invention is mainly to introduce a syste for tracking expansions and contractions of volumes, or just their changing surfaces. Therefore a systm is invented a magnetic field generating element, at least one receiving antenna for measuring magnetic field intensity values of magnetic fields, and a processor for determining the position of the object from the magnetic field.
  • the magnetic field generating element is positioned in connection with or close to an object and the position of the magnetic field generating element is used to determine movements of the body or the surface of the object.
  • system further comprises a reference magnetic field generating element being fixedly positioned.
  • more than one independently trackable magnetic field generating elements are positioned in connection with or close to an object.
  • At least one magnetic field generating element is positioned in connection with or close to the external surface of the object.
  • the magnetic field generating element is in- vivo, or invasively, positioned in a human body.
  • the magnetic field generating element is externally positioned in contact with a human body.
  • the object comprises a cavity and walls enclosing the cavity, wherein the movement being tracked is the movement of at least part of the walls enclosing the cavity.
  • the magnetic field generating element is positioned in connection with or close to at least a part of the walls enclosing the cavity.
  • a plural of magnetic field generating elements surround the object at least partly.
  • the plural of magnetic field generating elements are used to measure a change in cross-sectional area or volume of at least a part of the object.
  • the plural of magnetic field generating elements are attached to a shaped elastic or stretchable material and where the shaped elastic or stretchable material surrounds at least a part of the object.
  • the shaped stretchable material is shaped as a balloon, a pouch, a sheet of any shape, a belt, a band or any combination of these.
  • each magnetic field generating element creates a magnetic field for not overlapping periods of time, or pulses, and/or has individual frequencies.
  • each magnetic field generating element is equipped with a tag, such as a RFID tag, making them separately trackable.
  • the object is an organ in a human body, such as the bladder, the stomach, the gastrointestinal-tract, the lungs or the heart.
  • the magnetic field generating elements are attached to a stent, thus being positioned internally in the cavity of the body.
  • the measured positions are used as data to be stored and/or processed, to give a signal such as an alarm, to activate or deactivate an actuator or a valve, or to compress or relax an in-vivo or ex-vivo compression or expansion system.
  • the invention further concerns a method for determining the changing volume or cross-sectional area of an object comprising the steps of: providing at least one antenna (3); a plural of magnetic fields generating elements connected in or to the surface of the object, detecting the magnetic fields generated by the magnetic field generating elements by the antenna(s) and measuring magnetic field values of the detected magnetic fields; and determining the position of the magnetic field generating elements from the measured magnetic field intensity values, and thereby estimating the changes in volume or cross-sectional area.
  • the magnetic field generating elements are introduced with a cannula or endoscope.
  • Fig. A shows the basic principle of the invention, where an imlanted magnetic field generating element is tracked with antennas.
  • Fig. 1B illustrates the vectorial magnetic field of an element.
  • Fig. 2 shows a second aspect of the invention, where one magnetic field generating element is at a fixed position.
  • Fig. 3 shows the an imbodiment of the invention used to track the bladder.
  • Fig. 4 shows a plural of magnetic field generating elements positiond for tracking of a cross sectional area.
  • Fig. 5 shows a plural of magnetic field generating elements positioned at an elastic circular band.
  • Fig. 6 shows a plural of magnetic field generating elements positioned at an elastic sheet.
  • Fig. 7A shows a plural of magnetic field generating elements positioned at a band formed sheet.
  • Fig. 7B shows the sheetformed band wrapped around an object.
  • Fig. 8 shows a plural of magnetic field generating elements positioned at a poch formed elastic material.
  • Fig. 9 shows a plural of magnetic field generating elements positioned at a ballon formed elastic material.
  • Fig. 10 shows the pouch formed elastic element positioned at an object.
  • Fig. 11 shows the system of the invention used in gastric banding.
  • Fig. 12 shows the system of the invention used in gastric banding with bypass.
  • Fig. 1 A shows a simple illustration of the basic technology forming the present invention, where as in e.g. WO/2007/074445 a magnetic field generating element (2) is positioned inside a human or animal body (1), in the following non-limiting referred to as the human body (1).
  • the magnetic field generating element (2) generates a magnetic field (4) either continuously or in pulses and is therefore trackable, or traceable.
  • Preferably externally to the human body (1) is at least one receiving antenna (3), to detect the magnetic field, where the receiving antenna (3) would be connected to the necessary equipment for generating the received signal into data such as the intensity and/or the direction of the magnetic field, or said alternatively, either by measuring the intensity, the direction or by measuring the vectorial magnetic field.
  • the measured intensity can then be used to determine the distance from the magnetic field generating element (2) to the receiving antenna (3) and thereby the depth into the human body (1). Having three mutually orthogonal receiving antennas (3), it would then be possible to determine the position of the magnetic field generating element (2) within the human body (1).
  • the magnetic field generating element (2) itself may be a permanent magnetic object, such as, but not limited to, a ferromagnetic element, or it could be an electro magnet either getting energy from batteries or other energy storing devices, or could get energy from the externals as it is known in the art, such as receiving electro-magnetic energy in pulses.
  • Fig. 1B illustrates such a magnetic field generating element (2) having a magnetic field in the direction from left to right.
  • Fig. 2 shows a first preferred embodiment of the present invention, where a reference magnetic field generating element (5), also being magnetic field generating, is fixedly positioned at or in the human body (1), where the reference magnetic field generating element (5) advantageously, but not necessarily, is identical to the magnetic field generating element (2).
  • the reference magnetic field generating element (5) has a known magnetic field (direction and intensity / magnitude) and position. Thereby there would be no need for anatomical landmarks and it would be easy to ensure long term stability and to recalibrate the system.
  • One natural choice for positioning the reference magnetic field generating element (5) would be the pubis bone, but other positions either externally or internally to the human body (1) would also be possible.
  • the system is used to survey the movement of the surface of an object, where the object could be solid or hollow, and could be an internal organ of an animal or human or an external body part.
  • the magnet field generating elements (2) When used invasively, or in-vivo, the magnet field generating elements (2) should be bio-compatible, either in that the materials themselves are biocompatible, by coating them, or perhaps covering them by a foil. Any biocompatible material or any manner known in the art to make elements bio- compatible would apply to the invention.
  • an implanter in any manner known in the art to introduce e.g. a chip or tag into the body just beneath the skin of a pet animal.
  • One common way is to introduce the chip with a syringe type implanter where a pushing device inside the cannula pushes the chip out of the cannula when at the correct position within the body.
  • the magnetic field generating elements (2) would advantageously be equipped with fixation elements like for example small hooks for securing them at the desired position within the body.
  • one example of the surveillance of an internal organ to the human body is to position the magnetic field generating element (2) in connection to the bladder as seen in Fig. 3, showing the magnetic field generating element (2) being attached to the external surface of the bladder (6).
  • more than one movable and trackable magnetic field generating element (2) exists in the system.
  • the separate magnetic field generating objects (2) then advantageously would create magnetic fields in pulses not overlapping in time, in order to make them individually trackable, and they could in another preferred embodiment additionally be equipped with tags like RFID tags to give each magnetic field generating element (2) a unique identification. Any other traceable identification method would also apply to the invention, such as letting each trackable magnetic field generating element (2) operate at its own individual frequency.
  • one or more magnetic field generating elements (2) could be attached to a stent being introduced for example in the opening of the bladder, or into some other vessels or hollows.
  • Having a plural of magnetic field generating elements (2) makes it possible to track changes in e.g. cross-sectional areas and volumes.
  • This is illustrated in Fig. 4 showing three magnetic field generating elements (2a, 2b, 2c) positioned around a tube shaped object (7) having a first diameter (8a), and thereby a first cross-sectional area.
  • the magnetic field generating elements (2a, 2b, 2c) move to different positions. Measuring the new positions would give at least an indication of the second diameter (8b), and thereby the second cross-sectional area. Knowing the exact shape of the cross section of the object (7) and/or increasing the number of magnetic field generating elements (2) would then increase the precision of the estimation of the second cross-sectional area.
  • a 3-D picture could be obtained by distributing the magnetic field generating elements (2) around the (external or internal) surface of a (preferable hollow) body. In this manner a volume or a change in volume may be measured and estimated.
  • the tube shaped object (7) could for example be a stent inserted into an artery or vein.
  • the present invention when comprising a plural of magnetic field generating elements (2), they are attached to a stretchable and preferably elastic material, where the material in a non-limiting manner could be a polymer or more specifically an elastomere.
  • the stretchable material could be shaped as the (internal or external) surface of the object to be surveyed, and could be formed as a band, a pouch or a balloon.
  • Fig. 5 shows a preferred embodiment where four magnetic field generating elements (2) are attached around a band (10) of an elastic or at least stretchable material.
  • Fig. 6 shows another preferred embodiment where the magnetic field generating elements (2) are attached to a sheet of any shape (11) of an elastic/stretchable material.
  • the sheet (11) would then be wrapped around an object to be surveyed. Often the object would have openings or parts extruding that should not be covered by the sheet (11), so the sheet (11) could have any shape other than rectangular, any kind of cut-outs (12) and holes or include 3-D structures.
  • the sheet could advantageously be equipped with any known kind of connection means such as Velcro.
  • Fig. 7A shows a version where the sheet (11) is formed like a belt (13), and Fig. 7B shows this belt (13) wrapped around the object (14).
  • the belt could be equipped with connection means (like Velcro) at the ends (15a, 15b) to secure the two ends to each other, thereby securing the belt (13) to the object (14).
  • Fig. 8 shows a preferred embodiment where a plural of magnetic field generating elements (2) are distributed around a pouch (16) of an elastic or at least stretchable material.
  • Fig. 9 shows a preferred embodiment where a plural of magnetic field generating elements (2) are distributed around a balloon (17) of an elastic or at least stretchable material.
  • such a system comprising an elastic material and magnetic field generating elements (2) would be positioned preferably around the surface of the object to be surveyed, and would then follow the moving and changing surface of the object, as illustrated in Fig. 10, where a pouch shaped elastic (or at least stretchable) material (16) comprising the magnetic field generating elements (2) is positioned around the object (14) partly or totally comprising it (where the object (14) for example could be the bladder (6) of a human being).
  • the elastic material (16) would change accordingly, and thereby the magnetic field generating elements (2) would change positions accordingly.
  • the elastic material When used especially in-vivo, the elastic material would have to be biocompatible at least at the surface.
  • Fig. 11 shows one preferred embodiment of the present invention, where gastric band (20) is wrapped around an upper part of the stomach establishing an upper stomach pouch (21), but is not wrapped more tightly than to leave an access to the remaining stomach part (22).
  • Food first arrives to the upper stomach pouch (21) at a first rate, and the upper stomach pouch (21) fills to give the person the sensation to be full at a much earlier state than it would without the gastric band system.
  • the food enters the remaining stomach part (22) from the upper stomach pouch (21) to continue to the rest of the digestive system.
  • the gastric band (20) comprises the magnetic field generating element (2) positioned around the band, whereby it becomes possible to measure the dimensions of the gastric band (20), to give an indication of the actual state of the band and thereby the opening from the upper stomach part (21) to the remaining stomach part (22).
  • the gastric band system is equipped with a system (23) for adjusting the gastric band (20) where the system (23) would comprise means for receiving information and commands from the externals, possibly in response to the measured cross-sectional area of the gastric band (20).
  • a system could be any system known from the art, where one example is as it is described in US 2006/0252982.
  • Fig. 12 shows an addition to the gastric banding method where a bypass line (24) is inserted from the upper stomach pouch (21) to the gastrointestinal-tract (25), thereby partly or totally bypassing the remaining stomach part (22) lowering the amount of nutrition extracted from the food.
  • a valve system may be introduced comprising a controllable valve (26) and a control system (27) comprising means to receive instructions from the external and means to regulate the controllable valve (26).
  • the controllable valve (26) and control system (27) could be of any kind known in the art. This gives the option to partly or totally shut off the bypass line (24) from time to time to ensure that the body gets a chance to acquire the needed vitamins.
  • the system is equipped with an inclination sensor.
  • a sensor would then measure the inclination of e.g. a patient, since it influences the system whether the patient is lying, standing or sitting.
  • the measured inclination could then be included as additional input data for regulations of for example the bladder or sphincter control.
  • An ex-vivo example where the system could be applied is to survey babies, sick or just weakened people, since a band or belt comprising magnetic field generating elements (2) could be wrapped around their chest to survey whether they are breathing, and an inclination sensor added to the system could detect if a baby supposed to be sleeping is standing or crawling in the bed, giving off a signal.

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  • General Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Endocrinology (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention porte sur un système de suivi de changements de volumes ou de surfaces en coupe transversale d'objets, de préférence d'objets creux, par suivi des positions d'éléments de génération de champ magnétique. Le système est particulièrement approprié pour des systèmes in vivo dans lesquels les objets devraient être des organes creux, tels que la vessie et l'estomac.
PCT/DK2009/000172 2008-07-18 2009-07-14 Suivi de surfaces ou de volumes d'objets dynamiques Ceased WO2010006608A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200801015 2008-07-18
DKPA200801015 2008-07-18

Publications (1)

Publication Number Publication Date
WO2010006608A1 true WO2010006608A1 (fr) 2010-01-21

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PCT/DK2009/000172 Ceased WO2010006608A1 (fr) 2008-07-18 2009-07-14 Suivi de surfaces ou de volumes d'objets dynamiques

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Country Link
WO (1) WO2010006608A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016005983A3 (fr) * 2014-07-10 2016-04-07 Given Imaging Ltd. Ceinture de détection conçue pour localiser un dispositif in vivo et procédé de localisation associé
EP3176252A1 (fr) * 2015-12-04 2017-06-07 Ludwig-Maximilians-Universität München Système et procédé permettant de déterminer une force appliquée sur ou générée par une culture cellulaire ou tissulaire
DE102017200815A1 (de) 2017-01-19 2018-07-19 Robert Bosch Gmbh Messsystem und Verfahren zur Erfassung einer Position innerhalb des Körpers eines Individuums
US20230190280A1 (en) * 2021-12-16 2023-06-22 Cilag Gmbh International Implantable sphincter assistance device with shell-to-shell orientation controlled by fields of adjacent magnets

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040097803A1 (en) * 2002-11-20 2004-05-20 Dorin Panescu 3-D catheter localization using permanent magnets with asymmetrical properties about their longitudinal axis
US20040122334A1 (en) * 2002-09-19 2004-06-24 Alfred E. Mann Institute For Biomedical Engineering At The University Of Southern Vantilation and volume change measurements using permanent magnet and magnet sensor affixed to body
WO2007058526A1 (fr) * 2005-11-16 2007-05-24 Xsens Technologies B.V. Systeme de suivi de mouvement
US20070167758A1 (en) * 2005-11-23 2007-07-19 Costello Benedict J Automated detection of cardiac motion using contrast markers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040122334A1 (en) * 2002-09-19 2004-06-24 Alfred E. Mann Institute For Biomedical Engineering At The University Of Southern Vantilation and volume change measurements using permanent magnet and magnet sensor affixed to body
US20040097803A1 (en) * 2002-11-20 2004-05-20 Dorin Panescu 3-D catheter localization using permanent magnets with asymmetrical properties about their longitudinal axis
WO2007058526A1 (fr) * 2005-11-16 2007-05-24 Xsens Technologies B.V. Systeme de suivi de mouvement
US20070167758A1 (en) * 2005-11-23 2007-07-19 Costello Benedict J Automated detection of cardiac motion using contrast markers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016005983A3 (fr) * 2014-07-10 2016-04-07 Given Imaging Ltd. Ceinture de détection conçue pour localiser un dispositif in vivo et procédé de localisation associé
US10588542B2 (en) 2014-07-10 2020-03-17 Given Imaging Ltd. Sensor belt configured to localize an in-vivo device and method for localization
EP3176252A1 (fr) * 2015-12-04 2017-06-07 Ludwig-Maximilians-Universität München Système et procédé permettant de déterminer une force appliquée sur ou générée par une culture cellulaire ou tissulaire
WO2017093529A1 (fr) * 2015-12-04 2017-06-08 Andreas Dendorfer Système et procédé permettant de déterminer une force appliquée à une culture cellulaire ou tissulaire ou générée par ladite culture
US11685887B2 (en) 2015-12-04 2023-06-27 Andreas Dendorfer System and method for determining a force applied to or generated by a cell or tissue culture
DE102017200815A1 (de) 2017-01-19 2018-07-19 Robert Bosch Gmbh Messsystem und Verfahren zur Erfassung einer Position innerhalb des Körpers eines Individuums
US20230190280A1 (en) * 2021-12-16 2023-06-22 Cilag Gmbh International Implantable sphincter assistance device with shell-to-shell orientation controlled by fields of adjacent magnets

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