Classifications

• • 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
  • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
  • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
  • A61B18/203—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser applying laser energy to the outside of the body
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B2017/00017—Electrical control of surgical instruments
  • A61B2017/00022—Sensing or detecting at the treatment site
  • A61B2017/00057—Light
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B2017/00017—Electrical control of surgical instruments
  • A61B2017/00022—Sensing or detecting at the treatment site
  • A61B2017/00084—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
  • A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
  • A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
  • A61B2018/00029—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids open
• • 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

Definitions

• the present invention relates to a device for the treatment of tissue in
• the present invention further refers to a method for the treatment of
• tissue in vivo especially of cutaneous tissue, with the energy of a laser
• alexandrite, dye, and other types of laser are used, for various applications.
• Laser is used, for example, to perform incision, vaporization, surface
• the area under treatment is
• nebulized cryogenic gas interferes with the laser beam and, also in this case,
• cutaneous layer For example, in order to eliminate unwanted hair it is
• the same phototype is able either to absorb or backscatter different amounts of energy at different wave lenghts that can be used
• the object of the invention is to provide a laser device and a method
• the object of the invention is to provide a device
• the invention in general, can be used for the treatment of in vivo
• the device according to the invention comprises, in
• the patient under treatment will absorb a higher or lower amount of
• the means for detecting the energy sent back makes it possible to
• the applied energy will be increased in case the phototype absorbs little energy at such wave length.
• the device is provided with a
• the temperature sensor may
• thermometer an infrared thermometer, able to sense the temperature without contact.
• infrared sensor equivalent means may be
• the detection of the temperature allows the laser emission to be so
• the surface temperature of the latter is prefereably kept below 45°C.
• the device may be provided with a control
• the device is provided with an air-operated cooling system that
• the air-operated cooling provided by the present invention has
• FIG. 1 schematically shows the device according to the invention
• Figs. 2 and 3 are front and rear perspective views, respectively, of the
• Fig. 4 is a schematic side view of the hand piece.
• Figs. 5 to 9 indicate .results of experimental measurements.
• FIG. 1 Shown very schematically in Fig. 1 is a block diagram representation
• the device comprises a unit which
• One of the two sources includes two laser sources 3 and 5.
• One of the two sources for example the
• one designated by numeral 3 is a source for the generation of a pointing
• Laser 5 is instead a power laser and is
• the two laser sources 3 and 5 can be connected to a single light
• the light guide 9 may also be made up
• a photometer Arranged inside the hand piece 7, shown in greater detail in Figs. 2 to 4, is a photometer or
• thermometric sensor 19 Arranged sideway
• thermometric sensor 19 is the output end of the photometer 17 and thermometric sensor 19
• a spacer 21 is arranged on the hand piece 7 . Also arranged on the hand piece 7 is a spacer 21 intended to keep
• the hand piece further includes a
• thermometric sensor As can be seen in Figs. 2 and 4, the axes of the thermometric sensor
• Thermometric sensor 19 and photometer 17 are connected via line 23
• thermometric sensor 19 generated by the thermometric sensor 19 and a signal generated by the thermometric sensor 19
• photometer 17 proportional to the energy refelected or anyway returned by
• the power laser 5 being known.
• the temperature of the surface under treatment is constantly maintained.
• the control system 25 is configured to control the infrared thermometric sensor 19.
• tissue rises above a critical value, for example 40 or 50 °C, as detected by
• thermometric sensor 19 the control system 25 will interrupt the emission
• control system 25 would cut off the stream of cold air via the conduit 13 by closing a suitable valve, for example.
• Figs. 5 to 9 show experimental results obtained by the device
• thermometric sensor The temperature was measured with an infrared thermometric sensor
• the photometer uses a photodetector
• Hamatsu S1226 (Japan), suitably amplified and with a shield made up of a
• Fig. 5 Shown in Fig. 5 is a diagram showing the temperature (Curve T)
• the curve E has a peak in correspondence of the emission of the
• Fig. 6 shows the results of the same measurements on an inert
• Fig. 7 shows the same diagram as plotted in Fig. 6 but with a different
• Figs. 8 and 9 show the same curves of refracted or reflected energy and of temperature for measurements made on a subject.
• Fig. 8 refers to the
• the dermis reaches a temperature of 75°C, which is
• the photometer response is of 50%, i.e. only 50% of the energy is absorbed.
• laser beam as obtained, from example, with a galvanometer system.

Applications Claiming Priority (2)

Publications (1)

Family

ID=11353137

Family Applications (1)

Country Status (2)

Cited By (2)

Citations (6)

• 1999
  • 1999-12-21 IT IT1999FI000259A patent/ITFI990259A1/it unknown
• 2000
  • 2000-12-18 WO PCT/IT2000/000528 patent/WO2001045580A1/en active Application Filing

Patent Citations (6)

Also Published As

Similar Documents

Legal Events