Classifications

• • 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
  • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices ; Anti-rape devices
  • A61F5/0003—Apparatus for the treatment of obesity; Anti-eating devices
  • A61F5/0013—Implantable devices or invasive measures
  • A61F5/003—Implantable devices or invasive measures inflatable
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods
  • A61B17/34—Trocars; Puncturing needles
  • A61B17/3468—Trocars; Puncturing needles for implanting or removing devices, e.g. prostheses, implants, seeds, wires
• • 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
  • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices ; Anti-rape devices
  • A61F5/0003—Apparatus for the treatment of obesity; Anti-eating devices
  • A61F5/0013—Implantable devices or invasive measures
  • A61F5/0036—Intragastrical devices
• • 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
  • A61F2/30—Joints
  • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
  • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
  • A61F2002/30668—Means for transferring electromagnetic energy to implants
• • 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
  • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
  • A61F2250/0001—Means for transferring electromagnetic energy to implants

Definitions

• the present invention relates to a method of performing a " * • puncturing work on an inflated balloon implanted in a patient.
• the invention relates to a device for exercising a method of this type.
• the object of the present invention is to overcome these drawbacks. This is obtained when exercising the invention according 25 to said method by providing the balloon-like object with a high-frequency receiver system, by producing a high-frequency electromagnetic field in proximity to the patient which field is capable of penetrating into the patient and producing an electric current in the receiver system, and by causing said current to 30 activate a puncturing device in the balloon-like object.
• the condition of the receiver system is checked by detection of a signal produced by the receiver system in response to a HF-signal emitted outside the patient.
• the device for exercising the method according to the invention is characterized in that it comprises a combination of a high-frequency generator supplying HF-energy to an antenna coil which generates a HF-field that is capable of penetrating into the patient 10 in proximity to the coil, a high-frequency receiver system in the balloon-like object, and an electrically activatable puncturing device coupled to said circuit.
• FIG. 1 shows an embodiment of the device according to the invention
• Fig. 2 shows a balloon in an enlarged scale provided with an electric HF-receiver circuit
• Fig. 3 shows a schematical diagram of a further balloon 20 receiver circuit
• Fig. 4 shows an embodiment of a capacitor placed in the balloon and Fig. 5 shows a further embodiment of a capacitor in a cross sectional view along the line V-V in Fig. 2.
• the embodiment of the total puncturing device according to the invention shown schematically in Fig. 1 comprises a high-frequency generator 1 which operates at e.g. 27.12 MHz, but a plurality of various frequencies are just as suitable.
• the HF-energy of the generator is supplied to an antenna 2 generating a 30 high-frequency electromagnetic field.
• a patient's 3 stomach 4 contains an intragastric balloon 5, which is implanted in collapsed state through the oesophagus 6 by means of a catheter and gastroscope (not shown) and inflated with air through a tube (not shown) which is then removed.
• the balloon 5 shown in Fig. 1 is provided with an 35 electric circuit 7, which will be further explained below.
• the intragastric balloon 5 in Fig. 2 preferably consists of a plastics or latex material which is non-permeable to air and which must be smooth on the outside without welding seams or the like in order to prevent discomfort to the patient when laying in the stomach for a long time, e.g. 3-5 months.
• the shape of the balloon is not
• the valve 8 indicates a valve through which the balloon is inflated after being implanted in the stomach.
• the valve will normally be a one-way valve which is located in the balloon in such a way that it will not directly touch the stomach and cause irritation although it
• the shown electric circuit 7 comprises a receiver coil 9 with one or more turns.
• the coil forms an oscillatory circuit together with a capacitance which may be constituted by the actual stray capacitance between the ends of the coil or by a capacitor shown
• Said oscillatory circuit is preferably formed in such a way that resonance occurs at the operating frequency of the HF-generator 1.
• an electric resistor element 11 is inserted, which is placed in the balloon in close contact with its wall.
• the entire receiver system 7, 9, 10, 11 must be of non-toxic materials even though it is placed in a protected manner inside the balloon and the individual components may be produced according to a number of well known methods.
• the coil 9 may be of wire or foil or of a printed or vapour deposited layer of electrically well conductive
• the resistor element 11 may be prepared in the same way as the coil e.g. of the same material but with a smaller cross-section or preferably
• Fig. 2 shows the coil placed on the cylindrical surface of the balloon 5.
• the coil or several coils may be placed on two or more non-parallel walls of the balloon with mutual angles.
• the shape of the receiver coil 9 may be arbitrary e.g. rectangular, circular or helical. It is not necessary to place the oscillatory circuit on the balloon wall. It may also be placed in the interior of the balloon, e.g. on a carrier so as to reduce the loss and self capacitance of the coil. Particularly high frequencies may then be used or the emitted effect may be reduced.
• Fig. 4 shows a capacitor placed on the inside of the balloon wall and having inter-meshing comb-shaped electrodes 13, 14 of metal foil.
• Fig. 5 shows one of two superposed metal foil layers 15, 16 having an intervening plastics foil layer 17 which is placed in the area of the valve 8 so as to make it possible to use the plastics foil layers serving to fix the valve in the balloon also as dielectric in the capacitor.
• the capacitors shown are advantageous because they are highly flexible so that they will not cause any discomfort to the patient. Both the coil, capacitor, and resistor element may thus be produced of conductive foil which has been deposited or printed on the balloon or carrier.
• the transmitter coil 2 When the balloon is to be removed from the patient's stomach the transmitter coil 2 is placed close to the patient so that the generated HF-field can penetrate into the patient and induce a voltage in the receiver coil 9 upon operation of the activation switch 12 of the HF-generator.
• the current generated in the circuit 7 will produce in the resistor element such heating of the adjacent area of the balloon wall that fusing of the balloon material and thus puncturing of the balloon will be effected after a stipulated period of time.
• Tests performed with a specific plastics material in the balloon showed that the wall of the balloon softened slightly at about 100°C and was perforated at about 190°C. With a grid dip meter placed close to the patient, it is possible by a well known method to ascertain whether the circuit of the balloon is intact and ready for puncturing the balloon.
• Another way of checking the circuit is to provide it with a diode 18 connected in series with the resistor element as shown schematically in Fig. 3.
• harmonic frequencies will be emitted, particularly the second harmonic, which can be detected by a coil and a receiver outside the patient as long as the diode and resistor element 11 are intact.
• the invention is not only suitable in connection with intragastric balloons but also in other inflatable devices of similar type which are placed in body cavities, e.g. in connection with colostomy and ileostomy.
• the balloon may be inflated with liquid instead of with a gas. In that case, of course, further heat energy is required to puncture the balloon than compared with a balloon filled with gas.
• the puncture operation is effected by an electric resistor element producing such high local temperature of the material of the balloon wall that it is perforated
• the invention is not limited to this scope as the energy transferred from the outer HF-field and accumulated by the receiver circuit may be used in another manner to activate a puncturing device e.g. mechanically or chemically.

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Veterinary Medicine (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Public Health (AREA)
• Obesity (AREA)
• Child & Adolescent Psychology (AREA)
• Nursing (AREA)
• Vascular Medicine (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Surgery (AREA)
• Pathology (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Medical Informatics (AREA)
• Molecular Biology (AREA)
• Surgical Instruments (AREA)
• Media Introduction/Drainage Providing Device (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8112172

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (28)

Citations (2)

Family Cites Families (10)

• 1986
  • 1986-05-22 DK DK240886A patent/DK155637C/da not_active IP Right Cessation
• 1987
  • 1987-05-21 AU AU74831/87A patent/AU7483187A/en not_active Abandoned
  • 1987-05-21 WO PCT/DK1987/000060 patent/WO1987007132A1/en unknown
  • 1987-05-21 US US07/144,918 patent/US4908011A/en not_active Expired - Fee Related

Patent Citations (2)

Also Published As

Similar Documents

Legal Events