WO2013046086A1 - Dispositif de traitement de la peau à protection d'émission de rayonnement - Google Patents

Dispositif de traitement de la peau à protection d'émission de rayonnement Download PDF

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Publication number
WO2013046086A1
WO2013046086A1 PCT/IB2012/054803 IB2012054803W WO2013046086A1 WO 2013046086 A1 WO2013046086 A1 WO 2013046086A1 IB 2012054803 W IB2012054803 W IB 2012054803W WO 2013046086 A1 WO2013046086 A1 WO 2013046086A1
Authority
WO
WIPO (PCT)
Prior art keywords
tissue
light
light emitting
sensor
emitting device
Prior art date
Application number
PCT/IB2012/054803
Other languages
English (en)
Inventor
Guofu Zhuo
Jorgen Meeusen
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2013046086A1 publication Critical patent/WO2013046086A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N5/0613—Apparatus adapted for a specific treatment
    • A61N5/0616—Skin treatment other than tanning
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00452—Skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00773—Sensed parameters
    • A61B2018/00791—Temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00773—Sensed parameters
    • A61B2018/00791—Temperature
    • A61B2018/00797—Temperature measured by multiple temperature sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00773—Sensed parameters
    • A61B2018/00791—Temperature
    • A61B2018/00821—Temperature measured by a thermocouple
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00904—Automatic detection of target tissue

Definitions

  • the present invention relates to a skin treatment device for treating skin by means of radiation. More specifically, the present invention relates to a skin treatment device and a method of skin treatment which prevents undesired emission of radiation when the skin treatment device it is not in a position for skin treatment.
  • WO 2006/038168 Al discloses a skin treatment device comprising a radiation source mounted in a housing, such that radiation can be emitted through an exit opening in the housing.
  • the device further comprises at least one skin presence sensor capable of measuring the presence of skin in a number of respective positions, and a control unit which is constructed to determine a covered portion of the exit opening from a measurement signal of the skin presence sensor and to restrict emission of the radiation to the covered portion of the exit opening.
  • Disclosed skin presence sensors may include a physical pressure sensor, a gas flow sensor, an electrical impedance sensor (pair of electrodes), a light
  • a light emitting device for application near mammal tissue comprising at least one light source for emitting light towards a light emitting surface and at least one tissue sensor for detecting the presence of mammal tissue in front of said light emitting surface.
  • a controller is provided for controlling the at least one light source as a function of a value received from the at least one tissue sensor, wherein said at least one tissue sensor is a temperature sensor.
  • the light emitting device may be controlled to switch on only upon detection of mammal tissue in front of the light emitting surface.
  • An advantage of the invention is the fact that light emitting devices used in for example skin treatment often already have a temperature sensor build in for shutting off the device when the skin temperature increases to dangerous levels with substantial risk of overheating or burns.
  • the invention thus further increases the safety of the device at no additional cost.
  • the temperature sensor may be a contactless sensor such as an IR temperature sensor or a contact sensor such as a thermocouple. Both types of sensor are relatively small and can be easily integrated in a light emitting device.
  • the controller may be arranged for controlling the light source at a reduced light intensity or disable the light source when the tissue sensor value is indicative for the absence of mammal tissue.
  • the advantage of controlling the light source at reduced light intensity when the device is not applied near the tissue is that it is possible to inspect the light source, while operating at a safe intensity level, before the device is applied near or to the mammal tissue.
  • the detection whether mammal tissue is absent in front of the light emitting surface may be based on the detection of a temperature value lower than the ambient skin temperature, which is approximately 33°C, or a temperature value representative for ambient temperature.
  • Ambient skin temperature is defined as the skin temperature under normal conditions. Ambient temperature may for example refer to room temperature.
  • the controller may be arranged for controlling the light source according to a light protocol suitable for light and/or heat treatment of mammal tissue, only when the tissue sensor value is indicative for the presence of mammal tissue.
  • a light protocol suitable for light and/or heat treatment of mammal tissue is a good and reliable indication that the device is applied near or to the tissue and that the risk of the user looking into the light has disappeared.
  • the device can be operated at full functionality, at whatever light intensity needed for the light and/or heat treatment. Detection of the presence of mammal tissue may be based on a temperature value reading higher than the ambient skin temperature, which is approximately 33°C (i.e. normal human skin temperature).
  • a temperature value reading above approximately 43°C may be indicative for potential danger of burns or overheating of the tissue and the controller may be arranged to switch off the light source or drive the light source at reduced intensity so as to protect the mammal tissue and further allow the user to safely remove the device from the tissue.
  • a skin temperature of approximately 43°C is considered the maximum allowable safe skin temperature.
  • the light emitting device may comprise a plurality of light sources for creating a larger light emitting surface and thus irradiating a larger area of mammal tissue at once.
  • the temperature sensor may then provide input to the controller for controlling the plurality of light sources together.
  • the safety of the light emitting device may be further increased by providing a plurality of tissue sensors for detecting the presence of mammal tissue at a plurality of locations across or surrounding the light emitting surface.
  • the controller may then be arranged for controlling the light source or the plurality of light source as a function of a value received from at least one tissue sensors.
  • the plurality of tissue sensors may be used to create redundancy in the device and to make sure at least one sensor is always available for detection or plurality of tissue sensors may be used to have multiple sensor values combined into a more reliable detection.
  • the plurality of tissue sensors may also be used to create a contact map, i.e. a map of locations where the light emitting device is properly contacting or facing the tissue.
  • the controller may use this information to generate a corresponding light map and control the light source or the plurality of light sources to emit light only at those locations where mammal tissue is detected in front of the device.
  • the plurality of tissue sensors are located in between the plurality of light sources, which may be realized by having an array of sensors mixed or interwoven with an array of light sources.
  • the plurality of tissue sensors may be position at the periphery of the light emitting surface and surround the light sources.
  • the one or more light source are light emitting diodes (LEDs) emitting light in a wavelength range 410-480 nm.
  • LEDs light emitting diodes
  • tissue sensors contactless IR sensors may be used. Both the LEDs and IR sensors may be arranged and mixed on a single substrate such as for example a flexible PCB or electronic textile.
  • Fig. 1 is a cross section of an embodiment of the invention.
  • Fig. 2 is a block diagram of a software program that may be executed by a controller of a light emitting device according to an embodiment of the invention.
  • Fig. 1 illustrates a blue light-emitting device with an integrated infra-red temperature sensor.
  • the temperature sensor 2 is arranged on the same substrate 1 , on the same side and oriented in the same direction as the light sources (LEDs) 3.
  • the temperature sensor is used to detect the presence of skin 4.
  • a temperature is measured and compared with the ambient human skin temperature, i.e. the temperature of human skin in normal condition (not being treated).
  • the device will emit light at the lowest intensity or is fully disabled.
  • the device will switch to the desired treatment optical intensity only when the detected temperature is equal to or above the ambient human skin temperature.
  • the temperature sensor will prevent the human eye from (accidentally) looking direct into the light source when it is driven at the full light intensity.
  • Fig. 2 shows example of a block diagram for a controlling algorithm according an embodiment of the invention.
  • the temperature sensor When a user tries to switch on the device, the temperature sensor will measuring the skin temperature and compare the measurement with the ambient human skin temperature value, which may for example be preset to e.g. 33C°. If the detected temperature is below this skin temperature reference value, the device will be disabled or switch on only at low intensity. If the detected temperature is equal to or above the skin temperature reference value, the device is enabled and will apply a desired, possibly time varying, skin irradiance level according to a treatment program. During skin irradiation, the temperature sensor may be continuously, periodically or via interrupt read and compared with the ambient skin temperature reference value. If the detected temperature is below this reference value, this is indicative for a detachment of the device from the skin and the device will be immediately switched off or switch to low intensity. Otherwise, light irradiation will continue until a full treatment program is completed.
  • the ambient human skin temperature value which may for example be preset to
  • a computer program may be stored/distributed on a suitable medium, such as an optical storage medium or a solid-state medium supplied together with or as part of other hardware, but may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems. Any reference signs in the claims should not be construed as limiting the scope.

Landscapes

  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

L'invention concerne un dispositif d'émission de lumière destiné à être appliqué sur un tissu de mammifère à proximité. Le dispositif comprend au moins une source de lumière pour émettre une lumière vers une surface d'émission de lumière et au moins un capteur de tissu pour détecter la présence d'un tissu de mammifère tourné vers ladite surface d'émission de lumière. Le dispositif comprend en outre un organe de commande pour commander la ou les sources de lumière en fonction d'une valeur reçue à partir du ou des capteurs de tissu, le au moins un capteur de tissu étant un capteur de température.
PCT/IB2012/054803 2011-09-26 2012-09-14 Dispositif de traitement de la peau à protection d'émission de rayonnement WO2013046086A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161538981P 2011-09-26 2011-09-26
US61/538,981 2011-09-26

Publications (1)

Publication Number Publication Date
WO2013046086A1 true WO2013046086A1 (fr) 2013-04-04

Family

ID=47189988

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/054803 WO2013046086A1 (fr) 2011-09-26 2012-09-14 Dispositif de traitement de la peau à protection d'émission de rayonnement

Country Status (1)

Country Link
WO (1) WO2013046086A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017220530A1 (fr) * 2016-06-23 2017-12-28 Koninklijke Philips N.V. Protection thermique pour dispositifs de photothérapie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999011324A1 (fr) * 1997-08-29 1999-03-11 Asah Medico A/S Appareil de traitement de tissu
WO1999046005A1 (fr) * 1998-03-12 1999-09-16 Palomar Medical Technologies, Inc. Systeme d'application de rayonnement electromagnetique sur la peau
US20030032950A1 (en) * 1996-12-02 2003-02-13 Altshuler Gregory B. Cooling system for a photo cosmetic device
WO2006038168A1 (fr) 2004-10-05 2006-04-13 Koninklijke Philips Electronics N.V. Dispositif de traitement de la peau dote d'un systeme de protection contre l'emission de rayonnement
WO2006089227A2 (fr) * 2005-02-18 2006-08-24 Palomar Medical Technologies, Inc. Dispositif de traitement dermatologique
US20090326437A1 (en) * 2006-11-18 2009-12-31 Frank Beerwerth Device for treating the skin

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030032950A1 (en) * 1996-12-02 2003-02-13 Altshuler Gregory B. Cooling system for a photo cosmetic device
WO1999011324A1 (fr) * 1997-08-29 1999-03-11 Asah Medico A/S Appareil de traitement de tissu
WO1999046005A1 (fr) * 1998-03-12 1999-09-16 Palomar Medical Technologies, Inc. Systeme d'application de rayonnement electromagnetique sur la peau
WO2006038168A1 (fr) 2004-10-05 2006-04-13 Koninklijke Philips Electronics N.V. Dispositif de traitement de la peau dote d'un systeme de protection contre l'emission de rayonnement
WO2006089227A2 (fr) * 2005-02-18 2006-08-24 Palomar Medical Technologies, Inc. Dispositif de traitement dermatologique
US20090326437A1 (en) * 2006-11-18 2009-12-31 Frank Beerwerth Device for treating the skin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017220530A1 (fr) * 2016-06-23 2017-12-28 Koninklijke Philips N.V. Protection thermique pour dispositifs de photothérapie

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