JPH05505536A - Device for surgically treating tissue by expansion and thermotherapy - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Apparatus for surgically treating tissue by inflation and hyperthermia The present invention comprises an inflation means. Tissues treated with hyperthermia (hyberthermies), especially before The present invention relates to a surgical treatment device for the standing glands.

European patent! EP-A-0,248,758 describes a method for thermal treatment of the prostate. A microwave applicator is described that is inserted into the rectum of the patient. This app The data is held in place within the rectum by a side balloon. Because of this, the rectum needs to be protected. Also, this radiation probe from the rectum has A cooling liquid circulation path is provided.

European Patent No. EP-A-0,246,176 describes A catheter is described having a probe with a temperature sensor inserted into the catheter.

The device described in this patent is described in European Patent No. EP-A-0,248,758. It is possible to position the microwave applicator mounted on the device.

However, the microwave applicator inserted into the rectum is placed far away from the prostate. In order to irradiate microwaves, and because the microwaves do not actually hit accurately, Well, it's not satisfactory. Additionally, this device is extremely protective of the sphincter. is difficult, practically impossible, and generally requires protection of other surrounding tissues, especially the bladder. I can't even do it.

In French patent application no. 88/15126 (unpublished), the applicant has Probes and means of thermally protecting heat-sensitive tissues other than those to be treated, especially radiation We present a thermosurgical treatment device for tissues, especially the prostate, consisting of a heat reflective screen. provided.

The purpose of the present invention is to address a new technical problem, namely tissue accessible through body cavities. , especially to solve new technical problems of precise surgical treatment of the prostate. During or after hyperthermia treatment, the body cavity (lumen), the urethra in the case of prostate treatment. , to provide a method for expanding the .

The present invention solves this technical problem with a very simple device, i.e., which can be used on a commercial scale. Semi-invasion into the body through the body's natural cavities, or body cavities. ive) solve the problem using a possible device.

The present invention provides a method for removing tissue accessible via a body cavity, preferably the prostate gland, with thermotherapy. A probe-type device with heating means that can be inserted into a body cavity for medical treatment. The probe has a means for temporarily or intermittently increasing the outer diameter of the probe. If a step is required, at least the body cavity can be expanded at the tissue to be treated. The present invention provides an apparatus characterized in that the device is arranged relative to the probe so as to

In a preferred embodiment of the present invention, the outer diameter of the probe is increased temporarily or intermittently. at least one inflation balloon and a means for reducing pressure of about 2 bar to the inflation balloon; to about 20 bar, preferably 5 to 7 bar. and/or emptying means.

In another embodiment of the invention, the outer diameter of the probe is temporarily or intermittently increased. Means are located outside the probe.

In yet another embodiment of the invention, the inflation balloon is filled and/or emptied with pressure. means to communicate with or form part of the cooling circuit of the probe. There is.

In one embodiment of the invention, the inflation balloon can withstand pressures of up to 20 bar without bursting. made of flexible materials such as latex or reinforced latex that can ing.

In yet another embodiment of the invention, the probe is provided with a lock that secures the probe within the body cavity. The locking means includes a locking means such as a latex material surrounding the probe. This balloon is made with a lock that is independent of the above inflation means. When the inflation fluid is supplied through the supply means of the balloon, it expands and positions the probe. It is preferable to lock the position.

In yet another preferred embodiment, the dilatation balloon comprises at least vertically extend the exterior of the probe a sufficient distance to inflate the body cavity, especially at the prostate gland. extending in the direction.

In a further embodiment of the invention, the heating means is arranged in the central hole of the probe. This microwave generator has a French patent. Preference is given to those described in application no. 88/15126. This micro The wave generator consists of a probe and a coaxial metal cable, and the length of this metal cable is A part of the hand side is covered with an insulating coating, preferably the middle part or the distal part of the probe. preferably has at least one bare microwave-emitting portion at the stomach. In this embodiment, the inflation balloon is preferably located at the heating means.

The device of the invention expands the body cavity during or after the hyperthermia treatment and thus Tissues near the can be compressed. This greatly improves thermotherapy. can be done. If heat treatment is applied to the prostate, during or after heat treatment. dilating the urethra and compressing the prostate tissue and nearby surrounding bladder tissue and thereby, quite unexpectedly, can improve the problem of urinary incontinence, and in general You can permanently eliminate the problem of urinary disorders.

Other objects, features and advantages of the present invention include: It is clear from the embodiments of an exemplary device for surgically treating tissue to be attacked by thermal therapy. Let's become something. However, the following examples are merely examples and in no way limit the scope of the invention. It's not something you do.

The accompanying drawings show that the tissue to be destroyed by thermotherapy, preferably the prostate, is surgically treated. 1 is a conceptual partial longitudinal sectional view of the device of the invention for Please understand the drawing For simplicity, the heating means constituted by a microwave generator are not shown.

In the drawings, an apparatus for surgically treating tissue by means of hyperthermia therapy is generally designated by the reference numeral 500. It is. This device is placed inside the patient's body to access tissue that is destroyed by heat therapy. It consists of a probe 520 that is inserted into the cavity.

A preferred application of the invention is the treatment of the prostate by hyperthermia. Pro in this case The probe 520 is a urethral probe that is inserted into the urethra until it reaches the prostate. this urine The probe is described in the above-mentioned French patent No. H 88/15126 of the present applicant. It is preferable that the The content of this French patent application is part of the specification of the present application. constitute the department.

This probe 520 is described in the above-mentioned French Patent No. 8111/15126. heating means 518, preferably microwave, disposed within the central hole 519, It has a generator.

This microwave generator 518 is composed of a metal cable coaxial with the probe. A part of the length of the metal cable is surrounded by an insulating coating. Both parts have a bare part that emits microwaves, and this bare part is the part of the probe that emits microwaves. Preferably, it is in the intermediate longitudinal section or at the distal end.

A feature of the invention is that a body cavity (not shown) is optionally removed at least at the tissue to be treated. Temporarily or intermittently adjust the outer diameter of the probe to the probe to allow for expansion. The point is that it has means 600 for increasing the size. In other words, the prostate is treated with heat therapy. In case of treatment, this means 600 is placed at least at the prostate.

In a preferred embodiment of the invention, the outer diameter of the probe described above is temporarily or intermittently adjusted. The enlarging means 600 comprises at least one inflation balloon 600. child The inflation balloon 600 has a sole filling and/or emptying means, preferably about bar at a pressure in the range from 2 to 20 bar, more preferably at a pressure in the range from 5 to 7 bar. It has a means to inflate the runes. This pressure value depends on the manufacturing cost and maintenance cost of the device. Set the pressure to a preferable value to reduce stress and extend equipment life.

This means 600 is preferably attached to the outside of the probe 520 as shown. stomach.

Means 620 for filling and/or emptying the inflation balloon 610 cools the probe. It is preferable that the device be connected to or be part of the circuit. This cooling circuit is Preference is given to the circuit described in French Patent Application No. 88/15126.

In one embodiment of the invention, the inflation balloon 610 reaches 20 bar without bursting. Flexible materials capable of withstanding high pressures, e.g. latex or reinforced latex It can be made with.

In the accompanying figures, inflation balloon 610 is shown in an inflated state.

This embodiment is an essential part of the invention and thus of the present description.

In the inflated state, the balloon has an approximately cylindrical shape, the outer diameter of which constitutes the balloon It depends on the properties of the material and its internal pressure. Therefore, the final outer portion of the inflation balloon 610 The diameter can be adjusted over a wide range by the user. This point is particularly advantageous.

In another embodiment of the invention, the probe 520 has a hand that fixes its position within the body cavity. A stage 630 is provided. This locking means 630 is made of latex, for example. It consists of at least one locking balloon 632, which is a professional locking balloon 632. A locking inflatable enclosure surrounding the tube 520, preferably independent of the inflation balloon 630. By supplying inflation fluid through the inflation fluid supply means 634 of the tensioned balloon. Inflated to lock the probe in place.

In yet another embodiment of the invention, the inflation balloon 610 is configured to provide at least a thermal treatment. The tissue to be treated, particularly the prostate, is pressed long enough to fully distend the body cavity. It surrounds the outside of the lobe 520 and extends in the longitudinal direction.

Also, the lock shown in Figures 2 and 3 of French Patent Application No. 88/15126 Locking means 22 or locking means similar to locking means 126 of FIG. 4 may also be used. This follow-up The additional locking means 640 are as described in French patent application no. 88/15126. Preferably, the balloon is placed inside the bladder during prostate treatment.

The inflation balloon 610 is located in an intermediate position between the locking means 630 and 640, preferably is at least part of the heating means for thermotherapy, typically a microwave generator. It will be understood that it is arranged at least in a portion of the area.

The device of the present invention can be used to treat body cavities during or after heat treatment, and in the case of prostate treatment, the urethra. It can be expanded to compress nearby tissue.

The present invention further provides a method that can be inserted into a body cavity to access the vicinity of the tissue to be treated. A heated hand, preferably using a microwave generator, placed inside the radiation probe. A method of thermal treatment is provided in which the tissue is heated in stages. The characteristics of the method of the present invention are , at the point of expanding the body cavity during or after hyperthermia treatment of tissue.

An embodiment of this treatment method includes a probe having at least one inflation balloon. Expansion is performed using

The method of the invention is preferably applied to hyperthermia treatment of the prostate.

In this case, the radioprobe is a urethral probe that is inserted through the urethra to the prostate. It is. The balloon is attached to the outside of the urethral probe, at least in part It is located at the prostate during heat treatment.

The present invention includes any means technically equivalent to the above means and various combinations thereof. It is something that

summary The present invention relates to a device for surgically treating tissue, preferably the prostate gland, with thermotherapy. body cavity A body cavity in the form of a probe (520) having a heating means (518) insertable therein. This device surgically treats tissue, preferably the prostate, with hyperthermia accessible through the The position (500) is a means (600) for temporarily or intermittently increasing the outer diameter of the probe. ), and this means (600) comprises, if necessary, at least a portion of the tissue to be treated. be positioned relative to the probe so that the body cavity can be inflated at the It is characterized by

Submission of translation of written amendment (Patent Act aI! J Article 184-8) August 5, 1992 Tatsu

Claims (10)

[Claims] 1. in the form of a probe (520) having a heating means (518) insertable into a body cavity; , surgical treatment of tissues accessible through body cavities, preferably the prostate, with hyperthermia. In the device (500), the outer diameter of the probe is temporarily or intermittently increased. means (600), which means (600), if necessary, at least positioned relative to the probe so that it can inflate the body cavity at the tissue of interest. A device characterized by: 2. There are few means (600) for temporarily or intermittently increasing the outer diameter of the probe. Both have one inflation balloon (610) and about 2 bars on this inflation balloon (610). Filling pressure in the range from 1 to about 20 bar, preferably 5 to 7 bar and/or emptying means. 3. The means (600) for temporarily or intermittently increasing the outer diameter of the probe 3. A device according to claim 1, wherein the device is located outside the tube. 4. means (620) for filling and/or emptying pressure into the inflation balloon (610); ) is in communication with or forms part of the cooling circuit of the probe (520). 4. The device according to claim 2 or 3. 5. The inflation balloon (610) can withstand pressures up to 20 bar without bursting. Claims made of flexible materials such as latex or reinforced latex 5. The device according to any one of items 2 to 4. 6. The probe (520) includes locking means (630, 6) for securing the probe within the body cavity. 40). Apparatus according to any one of claims 1 to 5. 7. A locking means (630) surrounds the probe, e.g. made of latex. A balloon (632), and this balloon (632) is different from the inflation means (600). Inflation fluid is supplied via a supply means (634) to a separate locking balloon (632). 7. The device of claim 6, which expands to lock the position of the probe when dispensed. 8. An inflation balloon (610) is arranged to inflate at least the tissue to be thermally treated, particularly the prostate. extending longitudinally outside the probe a sufficient distance to inflate the body cavity at the Apparatus according to any one of claims 2 to 7. 9. the tissue to be treated is the prostate and the probe (520) is a urethral probe; 9. The device according to any one of claims 1 to 8, wherein the body cavity is the urethra. 10. A heating means (518) is disposed inside the central hole (519) of the probe (520). 10. The device according to claim 1, wherein the device is a microwave generator placed in a microwave oven.