GB2147208A - Laser surgery instrument - Google Patents

Laser surgery instrument Download PDF

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Publication number
GB2147208A
GB2147208A GB08420279A GB8420279A GB2147208A GB 2147208 A GB2147208 A GB 2147208A GB 08420279 A GB08420279 A GB 08420279A GB 8420279 A GB8420279 A GB 8420279A GB 2147208 A GB2147208 A GB 2147208A
Authority
GB
United Kingdom
Prior art keywords
laser
fibre
handle
hand
hand applicator
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.)
Granted
Application number
GB08420279A
Other versions
GB8420279D0 (en
GB2147208B (en
Inventor
Dr Frank Frank
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm 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 Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Publication of GB8420279D0 publication Critical patent/GB8420279D0/en
Publication of GB2147208A publication Critical patent/GB2147208A/en
Application granted granted Critical
Publication of GB2147208B publication Critical patent/GB2147208B/en
Expired legal-status Critical Current

Links

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
    • A61B18/22—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 the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • 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
    • A61B18/22—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 the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
    • A61B18/24—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 the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor with a catheter
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M3/00—Medical syringes, e.g. enemata; Irrigators
    • A61M3/02—Enemata; Irrigators
    • A61M3/0204—Physical characteristics of the irrigation fluid, e.g. conductivity or turbidity
    • A61M3/022—Volume; Flow rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M3/00—Medical syringes, e.g. enemata; Irrigators
    • A61M3/02—Enemata; Irrigators
    • A61M3/0279—Cannula; Nozzles; Tips; their connection means

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Otolaryngology (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Laser Surgery Devices (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

A hand applicator for laser surgery has a laser fibre (10) guided in a tube (11) constructed as a hand instrument and which is fed with cooling liquid. The cooling liquid (15) flows coaxially around the light-guiding fibre (10) to cool both the end of the fibre (10a) and the tissue being irradiated. <IMAGE>

Description

SPECIFICATION Laser Surgery Instrument This invention relates to a hand applicator instrument for laser surgery, wherein a laser guide fiber is located in a handle casing assembly.
Hand applicators of this kind are known having a number of different constructions. Hand applicators are also known, especially for surgical and microsurgical use of Nd YAG lasers where the laser fibre is cooled by gas. In these systems the flow of cooling gas for many neurosurgical and dermatological operations causes undesirable carbonisation on the surface of the tissue during the laser irradiation.
An object of this invention is to provide a hand applicator for laser surgery which will be suitable for micro-surgery and also provide a greater homogenous depth of coagulation.
According to this invention there is provided a hand applicator for laser surgery with a laser fibre located in a handle casing wherein the laser fibre and the end of the fibre are coaxially flushed and cooled by a liquid passing through a narrow guide tube extending from the handle.
Further preferred features are described in the following with reference to the drawing, showing an embodiment as an example.
It is a known fact that the requirement for radical destruction of tumors on the surface of the vesicle wall can be achieved by appropriate types and depths of necrosis. The Neodymium YAG laser used in such cases is characterized by little absorption into the living tissue thus enabling the operation to be performed to a considerable depth in tissue as well as homogenous coagulation necrosis. The decisive factor in the laser irradiation applied is the energy which is the product of laser power and irradiation time, and the power density which is a function of distance from the irradiation source.
A special optical system has hitherto been used in order to achieve independence in the irradiation distance. Deposits of blood on the tissue results in a considerable surface temperature rise and thus to a premature carbonization and a seriously reduced depth of penetration. This is due to increased absorption by the haemoglobin. On the other hand, micro-surgery cannot be carried out using this optical accessory due to the considerable amount of space which it occupies. As a remedy a hand applicator has been proposed in which the laser fibre 10 and the end 10a are flushed coaxially by a liquid and cooled in a narrow guide tube 11 projecting from a handle casing 12. This cooling by the liquid also extends to the operating area and a rapid surface change in the tissue is thus prevented.
This ensures that even in deeper zones the coagulation temperature is reached without removal of tissue from the surface. It has now been found that as soon as a whitening of the surface tissue is just visible a penetration depth of over 4 mm in the spherical necrosis has already been reached. The flushing not only cools the irradiated tissue but enables the coagulation at the desired depth and homogeneity to be obtained and ensures that the point 10a of the fibre will at all times be clean and free of tissue and coagulated blood.
It is proposed also that the guide tube 11 should be cranked or bayonet-shaped so that the operation can be carried out under the microscope without limiting the field of vision.
The handle 12 of the applicator is provided with a connecting valve 16 for the flushing liquid 15 which is fed in an adjustable manner by means of a tap 1 6a. It is also possible for the through-flow of flushing liquid to be controlled by means of special flow and/or temperature sensors. The handle 12 is preferably designed as a casing which is straight and rectangular in cross section, provided with grooves 13 or knurling on a wider side to be gripped and carrying the guide tube 11 at one end and a coupling device 14b at the other end for connection with the transmission or conveying cable 17.
The construction described in the foregoing provides a hand applicator for laser surgery and particularly for laser micro-surgery which will not only allow deeper even coagulation but which will also keep the end of the fibre clean and cool and the irradiated area of the tissue free from carbonization.

Claims (6)

1. A hand applicator for laser surgery with a laser fibre located in a handle casing, wherein the laser fibre and the end of the fibre are coaxially flushed and cooled by a liquid passing through a narrow guide tube extending from the handle.
2. A hand applicator in accordance with Claim 1, wherein the guide tube is cranked.
3. A hand applicator in accordance with Claim 1 or 2, wherein the handle is provided with a valve coupling for the flushing liquid and a grooved or knurled holding part.
4. A hand applicator in accordance with any one of Claims 1 to 3, wherein the handle, in cross section, forms a straight rectangular casing provided at one end with the guide tube and at the other end with a coupling device for connection to a transmission cable.
5. A hand applicator in accordance with any one of Claims 1 to 4, wherein the valve for the flushing liquid is constructed so that it can be turned on or off or the through-flow regulated by a hand lever or a flow and/or temperature sensor.
6. A hand applicator for laser surgery constructed and arranged to function as described herein with reference to the drawing.
GB08420279A 1983-09-30 1984-08-09 Laser surgery instrument Expired GB2147208B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833335696 DE3335696A1 (en) 1983-09-30 1983-09-30 HAND APPLICATOR FOR LASER SURGERY

Publications (3)

Publication Number Publication Date
GB8420279D0 GB8420279D0 (en) 1984-09-12
GB2147208A true GB2147208A (en) 1985-05-09
GB2147208B GB2147208B (en) 1987-03-25

Family

ID=6210681

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08420279A Expired GB2147208B (en) 1983-09-30 1984-08-09 Laser surgery instrument

Country Status (4)

Country Link
JP (1) JPS60156442A (en)
DE (1) DE3335696A1 (en)
FR (1) FR2552657A1 (en)
GB (1) GB2147208B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454807A (en) * 1993-05-14 1995-10-03 Boston Scientific Corporation Medical treatment of deeply seated tissue using optical radiation
US6167177A (en) * 1996-07-05 2000-12-26 Permanova Lasersystem Optical fiber cable
WO2009103299A1 (en) * 2008-02-18 2009-08-27 Aliaa Aly Mahmoud Aly Surgical laser device
WO2009103300A1 (en) * 2008-02-20 2009-08-27 Aliaa Aly Mahmoud Aly A brain laser

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU3472993A (en) * 1992-01-15 1993-09-01 Premier Laser Systems, Inc. Corneal sculpting using laser energy
US5250054A (en) * 1992-05-01 1993-10-05 Li Medical Technologies, Inc. Intracorporeal knot tying apparatus and method
DE19500353C2 (en) * 1995-01-07 1997-06-26 Foth Hans Jochen Dr Laser surgical device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033958A1 (en) * 1980-02-08 1981-08-19 Sumitomo Electric Industries Limited A laser knife
EP0070132A1 (en) * 1981-07-07 1983-01-19 Sumitomo Electric Industries Limited Adaptor extension mechanism for a laser scalpel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443829A1 (en) * 1978-12-16 1980-07-11 Wolf Gmbh Richard COAGULATION DEVICE FOR FABRICS OF CAVITIES OF HUMAN BEINGS OR ANIMALS
CA1198481A (en) * 1981-07-02 1985-12-24 Kazuhito Murakami Hand piece for use with surgical laser knife device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033958A1 (en) * 1980-02-08 1981-08-19 Sumitomo Electric Industries Limited A laser knife
EP0070132A1 (en) * 1981-07-07 1983-01-19 Sumitomo Electric Industries Limited Adaptor extension mechanism for a laser scalpel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454807A (en) * 1993-05-14 1995-10-03 Boston Scientific Corporation Medical treatment of deeply seated tissue using optical radiation
US6167177A (en) * 1996-07-05 2000-12-26 Permanova Lasersystem Optical fiber cable
WO2009103299A1 (en) * 2008-02-18 2009-08-27 Aliaa Aly Mahmoud Aly Surgical laser device
WO2009103300A1 (en) * 2008-02-20 2009-08-27 Aliaa Aly Mahmoud Aly A brain laser

Also Published As

Publication number Publication date
DE3335696A1 (en) 1985-04-18
GB8420279D0 (en) 1984-09-12
GB2147208B (en) 1987-03-25
FR2552657A1 (en) 1985-04-05
JPS60156442A (en) 1985-08-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee