DE3012223A1 - Optical radiation coagulator e.g. for gynaecological bleeding - has interchangeable end cap fitted to light conductor providing enlarged output face - Google Patents

Abstract

The radiation coagulator has light from a source fed to an optical conductor (18) with an interchangeable sleeve fitted to its light output end having an output window (30') with an end face (32) formed of a plastic's with anti-adhesion characteristics. The output window (30') is spaced from the end of the light conductor (18) and is widened outwards to provide an end face (32) of greater dia. than the end face of the light conductor (18), e.g. with approximately double the surface area. Pref. the light conductor (18) comprises a solid quartz rod (18) having an opaque plastics outer sheath. An end cap (26) is screwed onto its output and via a threaded ring, the end section of the end cap (26) being conical with a cone angle of 60 degrees and the end face (32) pressed against the tissue made of a polymer plastics, e.g. PTFE.

Description

Radiation coagulator

The present invention relates to a radiation coagulator according to the preamble of claim 1, in particular a radiation coagulator for gynecological purposes .PFA or a solid plastic with high thermal resistance, property and sufficient optical transparency.

This known radiation coagulator enables coagulation with the jet exit surface pressed against the tissue to be coagulated, what for many Applications is very beneficial.

The present invention is based on the object of a radiation coagulator of the type mentioned to the effect that he is especially for gynecology, such as the stoppage of portio bleeding and for emergency rehabilitation of benign changes in the portio.

In the case of a radiation coagulator, this task becomes the one mentioned at the beginning Art according to the invention by the features specified in the characterizing part of claim 1 solved.

Developments and advantageous embodiments of the invention Radiation coagulators are the subject of subclaims.

Since the light exit surface of the radiation coagulator according to the invention is larger than in the known case and substantially uniform from that from the The light exit end of the light guide is penetrated by the radiation cone exiting, a uniform coagulation of a larger area is possible without having to do this different light guides required.

Certainly shaped exit windows enable the coagulation of the Portiorandes or the mouth of the Portio.

In the following, exemplary embodiments of the invention are referred to explained in more detail on the drawing. They show: FIG. 1 a somewhat schematized one Side view of a radiation coagulator with the light guide end cap removed; FIG. 2 shows an enlarged sectional view of the light exit end compared to FIG of the light guide with a known end cap and Figures 3 and 4 two embodiments of light guide end caps for a radiation coagulator according to the invention.

The radiation coagulator shown in Fig. 1 consists of one gun-like applicator 1U, which is connected to a power supply via a flexible cable and control part 12 is connected. The applicator 10 is designed like a pistol and consists essentially of a housing 14 in which there is a radiation source located, a light guide 16 and a handle 19. The light guide 16 contains e.g. a rigid quartz rod 18 (Fig. 2) covered with an opaque protective tube 20 surrounded by plastic and provided at the end with a sleeve 22 which has an external thread 24 has.

The quartz rod 18 is preferably slightly above the front end of the Sleeve before, as can be seen from FIG.

On the sleeve 22, an end cap 26 can be screwed, which is a dem External thread 24 has corresponding internal thread 28, and at the front end with a radiation exit window 30 is provided, which has a beam exit surface 32 forms, which when using the radiation coagulator to a to be coagulated Tissue. is pressed and consists of a polymer plastic, which is coagulated on the Tissue adheres as little as possible. Suitable plastics are the known fluorocarbon polymers such as PTFE, TFEP and TPFA. The radiation exit window 30 can, as shown in FIG. 2 is, from a sufficiently radiation-permeable and a sufficient mechanical stability are made of plastic or contain a glass or quartz substrate, that on the outside with a thin layer or film of the plastic in question is provided (see e.g.

Fig. 3).

In a known coagulator, the one described with reference to FIGS. 1 and 2 Art two light guides of different diameter are provided, which can be made as desired can be inserted into the housing 14 and different beam exit surfaces Form diameter. The exchangeability of the end cap only has the purpose to be able to renew the jet exit surface more easily.

According to the present invention are in the present radiation coagulator on the other hand, additional end caps with larger jet exit surfaces are provided, so that even with a light guide with a smaller cross-section, a larger area is always available can be coagulated.

In Fig. 3, an end cap 26 'is shown, which is a conical having widening end portion 34, which by a radiation exit window 30 'accordingly larger dimension is complete. The radiation exit window 30 'is flat and includes a substrate 36, such as made of quartz or borosilicate glass, and one on top of the Substrate sprayed or otherwise applied thin non-stick layer 38 one of the plastics mentioned, which forms the jet exit surface 32. The opening angle a of the conical part 34 is advantageously approximately equal to the divergence angle the radiation beam emerging from the light exit end of the light guide and is expediently about 60 degrees for a quartz rod light guide. To this Wise is a largely uniform irradiance over the entire beam exit area guaranteed.

The jet exit surface 32 can expediently in practice be about twice as large as the light exit surface of the light guide. If so the quartz rod 18 of the light guide has a diameter of 10 mm, the diameter is of the window 30 'thus expediently about 15 mm.

Figure 4 shows an end cap 26 ″, in which the beam exit window 30 "the shown hat shape (or roughly the shape of a Gaussian bell curve) Has. The axial height of the window 30 'is slightly larger than the diameter and can with a 10-millimeter-i-light guide rod 18, for example, carry about 15 mm b.

The hat-shaped beam exit window 30 "consists of one of the above-mentioned fluorine-containing plastics and can be formed by hot working will. Of course, a correspondingly shaped glass body can also be used use the outside of which is coated with one of the plastics mentioned.

With the radiation exit window 30 "according to FIG. 4, the Treat the portio mouth particularly well.

Because the radiation exit window described a certain distance from the solid quartz rod 18 of the light guide, the heat dissipation is to the Quartz rod low and the coagulation effect on the surface of the beam exit surface adjacent tissue correspondingly large. Blank page

Claims (5)

Radiation coagulator Radiation coagulator with a radiation source, a light guide and an exchangeable sleeve attached to the beam exit end of the light guide, which has a beam exit window with a beam exit surface Contains plastic having properties, characterized in that the radiation exit window (30 ', 30 ") is arranged at a distance from the light exit end of the light guide (18) and is shaped so that the beam exit surface (32) has a significantly larger surface dimension than the light exit end of the Light guide (18). 2. Radiation coagulator according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the radiation exit window (30 ') is essentially flat and arranged at the end of a conical enlargement (34) of the exchangeable sleeve (26 ') is. 3. Radiation coagulator according to claim 2, d a d u r c h g e k e n n shows that the radiation exit area (32) is about twice as large like the radiation exit surface of the light guide (18). 4. Radiation coagulator according to claim 2 or 3, d a d u r c h characterized, that the opening angle (α) of the conical surface on which the circumference of the light exit end of the light guide (18) and the circumference of the radiation exit window (30 ') lie, is about 60 degrees and that the light guide (18) consists of a solid rod. 5. Radiation coagulator according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the window (30 ″) forming the light exit surface (32) has a axial cross-section in the form of a hat or a Gaussian bell curve (Fig. 4).