SU555570A1 - Method of removing tumour - Google Patents

Description

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This invention relates to the field of medicine, namely neurosurgery.

There is a known method of removing a brain tumor with a ps / cw focused focused laser beam}.

However, if the tumor is removed by the lime method, it is possible to injure healthy tissues and spread the tumor cells during the operation.

The aim of the invention is to prevent the spread of tumor cells during surgery.

This is achieved by first removing the central part of the tumor with a focused laser beam, and then removing the peripheral parts of the tumor with thin layers of a successively defocused laser beam.

The method is followed by a process.

During the operation, the laser beam is directed onto the operative field and the tube is positioned so that the focus is on. I walked near the surface of the operating field and even at a certain depth.

In this case, all useful radiation power is concentrated at one point and the process of dehydration and

the burning of tissue with the energy of the beam at this point proceeds almost instantaneously. By moving this point along the surface of the surgical field and in depth, the surgeon performs the desired tissue incision.

During the operation of removing a brain tumor, the soft tissues of the head, the dura mater, are dissected into the brain.

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First, the central part of the tumor is removed, which is cut out with a focused laser. If necessary, the central part of the tumor is cut into several pieces and removed.

5 in series. When the central part of the tumor is removed, the remaining peripheral layers of the tumor shrink, separating from the healthy brain tissue. This greatly facilitates and prevents the removal and removal of peripheral areas of the tumor without damaging the adjacent healthy brain tissue from direct exposure to them by the focused laser beam.

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The second stage of tumor removal is the removal of the peripheral areas of the tumor adjacent to the healthy tissues of the brain.

When performing this stage of the operation, the installation tube is retracted from the operating floor. The focus of the laser beam is in space, and the divergent beam of the defocused beam hits the operative field and affects some operating field. The shape of the pad depends on the angle of incidence of the laser beam and can be round or elliptical, and its dimensions depend on the distance of the tube from the surgical field. In this case, the laser energy is distributed over the entire surface of the site.

With this divergent, defocused laser beam, the entire peripheral part of the tumor and its capsule are treated from the inside of the remote central part until the tumor remains completely removed. By manipulating the tube and regulating the radiation power, the area of the treated surface is changed depending on the area of the remains of the affected tissue and the depth of its penetration into healthy brain tissue.

If the tumor is located (or another pathological process of small size) on the surface of the brain, its removal can be done quite quickly and accurately by only processing with a diverging defocused beam.

This method can be used to remove a tumor in other organs and on the surface of other biological tissues. When using a laser system of sufficiently high power, there is no need for dissecting and removing the central part of the tumor at the first stage; The higher power of the laser system will reduce the duration of the operation.

First removal of the central part of the tumor with subsequent processing of its peripheral areas immediately adjacent to the health of brain tissue, with a diverging defocused laser beam ensures minimal damage to healthy tissues from direct exposure to the laser beam with high precision and complete removal of the tumor, regardless of the degree of penetration into healthy tissue, simplifies and facilitates the operation, prevents the occurrence of relapse.

Claims (1)

Invention Formula A method of removing a tumor using a focused laser beam, which is fading and so that, in order to prevent the spread of tumor cells in the tumor, the operation first focused the laser beam to remove the central part. laser beam. Sources of information5 taken into account in the examination: 1 "Biological Medical Electronics, Sverdlovsk lS72f with" 118, 119