DE1953834B2 - DEVICE FOR CRYOSURGERY - Google Patents

Description

3 4

depth of 2 5 mm and with a freezing needle of the same a getter filled with absorption material

2 mm in diameter, not even a freezing chamber 15 is provided. At the end of the shaft 11

depth of 1mm reached. there is a union nut 16. The union

The design according to the invention of the lug nut lo fits onto a threaded piece 17 on the

processing parts and refrigerant supply is also in the 5 handle part 2. The handle part 2 has a nozzle 18,

Operation of a cryosurgical one that is open at the tip and that fits into the shaft 11 of the probe 3. With help

Probes of great advantage because with such probes the union nut 16 can be used to remove the probe 3 from the handle

the freezing speeds of 1000 to 2000 ° C / part 2 and against a probe of a different design,

min. practiced and therefor large amounts of cold - for example a so-called open probe, d. H.

medium are required, which in the supply line 10 is a probe in which the cooling medium is directly in

only; brought more into contact with the tissue to be cooled without losses and the supply volume

restricting gas formation is supplied to the probe tip, must be exchanged. In the transition area

and in the return line between the probe 3 and the handle part 2 without being cooled

the. can be returned. different coupling parts. In the figure

In order for the refrigerant line, which is provided by the front 15, for example, a coupling pipe piece 19

rnubehälters to the probe tip and from this for the inner line 7 with sealing and sealing

ZLi ick leads and from individual, composite binding elements20, which preferably consist of a

L-.iiiings- as well as apparatus parts, weakly cold-sensitive plastic exist, a plug

si <"en to prevent vacuum insulation, connection 21 for the electrical lines to the

The vacuum insulation advantageously uses the 20 probe head, for example for additional heating

V. connection parts between the line and Ap- in the probe head for the detachment of the probe 3 from

pnr.Ueteilen, in each case the end of a line frozen tissue after the treatment and for

partly with the vacuum insulation the end of a temperature sensor, which is attached at 22,

exposed line part towers above. as well as sealing elements 23 for the maintenance

:, - u Advantage, the handle part has a handle 25 direction of the vacuum insulation.

for better handling of the device as well as for The connecting piece 18 of the handle part 2 also has

Recording of switch and control buttons on, where concentric sections on, whereby the inner line

dui. i) it is possible for the surgeon to use the cryosurgery 24 to supply the cooling medium

gical device to control from the handle and the probe 3 and the outer line 25 for the return

Lime medium supply to the probe tip and the guide of the same is provided. Between

To regulate the return of the calorific. Lines 24, 25 there is another vacuum

V, further details of the invention are described in isolation 24 α. In the outer line 25 is a

Hand housed the heater shown schematically in the figures, through which the cooling

Embodiment described. The left edge flows back medium and here, if it is still

of Fig. 2 adjoins the right edge of the 35 is liquid, is evaporated.

F i μ. 1 at. On the handle 26 of the handle part 2 are located

The device according to the invention consists of control buttons in the illustrated embodiment

a central device, which itself is not shown management example with a first control button 27

is and is to be thought of at 1 in Fig. 2, a handle which the cooling medium supply to the head of the probe3

part 2, a probe 3 and a line package 4 40 is set in motion, and a second operating

between handle part 2 and central unit 1. The probe 3 button 28, with which the additional heating in the head of the

In the illustrated embodiment, a so-called probe 3 can be switched on. On the handle part 2

called closed probe, when used the transition elements for

the cooling medium, for example liquid nitrogen, the connection between the line package 4 and

not directly with the tissue to be cooled in the handle part 2. In the illustrated embodiment

emotion comes. The probe 3 shown has a is only part of the line package 4 in a simple way

shape suitable for insertion into the body, such as detachable from the handle part 2.

they are used, for example, in prostate operations. These transition elements may include, for example. At its tip it has a metal-like threaded part 29, various line niches head 5 and, somewhat behind, a 50 spacer 30, a seal 31 and one with a push button 6. The tubular part of the probe 3 is a getter chamber 32 filled with absorption material in concentric form Assembled sections, an evacuated intermediate space 33, which has an eva, from the inside to the outside, a line 7 for the courier nozzle 34 and is connected to the vacuum insulation supply of the cooling medium to the head of the probe 3 tion 24 α,
made of stainless steel or a cold-insensitive 55 The line package 4 is made of concentric plastic, a line 8 for the return of the cut, namely from the inside to the outside of the cooling medium and a vacuum insulation 9 arranged on a line 35 for the supply of the cooling system. As indicated in the case of the medium to the probe 3, a vacuum insulation 36, 10, the individual sections are separated from one another by spacers which are connected to the intermediate space 33. 60 and an external line 37 for the return

At its end facing the handle part 2, the cooling medium is loaded. The walls 38,39,40 the If the probe 3 sits a hollow, double-walled lines 35,36,37 are in the illustrated embodiment shaft 11. The space between the two roughly corrugated pipes, namely the two inner ones Walls 12 and 13 of the shaft 11 are also 38, 39 made of stainless steel and the outer 40 made of Kunsle evacuated and is in connection with the vacuum material with an inserted support spiral. At this insulation 9 of the front part of the probe 3. A union nut 41 is to be produced for the outer wall 40 the vacuum in the probe 3 is applied to the threaded part 29 of the handle part 2 Evacuation nozzle 14 and is screwed to maintain it. When the union nut 41

5 6

is released, part of the outer wall 40 The continuation of the line 49 can, for example

be pushed back away from the handle part 2. This is when an open probe hits the handle part 2

by both the evacuation nozzle 34 is placed and if the device with a

also the electrical lines, which is equipped inside the special suction device, with a

Line 37 for the cooling medium are laid, 5 suction fans in the central device 1 are freely connected. That

accessible. The suction fan can also be connected to a separately

The line package 4 is, as shown in FIG. 2 - led suction line, which the illustrated embodiment

Lich, at its end facing the central device 1, for example, does not have to be connected. Such

with a union nut 42 on a threaded part embodiment is particularly favorable if one

43 of the central device 1 releasably attached. As over- io individual pieces of tissue for cold treatment from their

A coupling piece 44 is used for the passage part, on which the surroundings are lifted out by suction

Union nut 42 is attached. The coupling should.

Piece 44 comprises a number of transition elements, the outer wall 40 of the line package 4 is For example, line elements 45, centering aids connected to a union nut 51, which on a 46 and a seal 47. The vacuum insulation 36 15 threaded part 52 of the coupling piece 44 aufgedes Line package 4 finds its end in the ring screwed. Similar to the case of the overturned Space 48 of the coupling piece 44. From the nut 41, the wall 40 can here too the line 49 for the return of the cooling loosening of the union nut 51 from the central device 1 mediums, the electrical lines running in it will be pushed back a little, thereby ge-lines through a lateral connection 50 exposed parts in the transition area between the and a cable connector (not shown) separates the line package 4 and the coupling piece 44 introduced into the central device 1. become accessible.

For this 1 sheet of drawings

Claims (4)

a liquid gas from a storage container by a patent claims: line part to a closed to the tissue evaporation chamber at the tip of a probe 1. Device for cryosurgery with a guided and replaceable essentially vaporized liquid to a cryosurgical probe 5 gas through a second one, fixed parallel to the first one Handle part is returned with a line part from a cold fendes. The two medium reservoir through this line parts running parallel to one another to the probe leading refrigerant supply line and each surrounded by thermal insulation also through this leading refrigerant and lead through a handle part, which of a return line, each refrigerant line being formed in an oval sleeve. The oval sleeve holds is surrounded by thermal insulation, since both line parts together, the heat through characterized in that concentric insulations abut one another along a line. around the refrigerant supply line (24) to- In the free spaces within the oval first a vacuum insulation (24 a), then the sleeve is filled with a filler in some places. Refrigerant return line (25), then a further 15 Such a device with such line parts tere vacuum insulation and as the outer jacket in the handle part is for the operation of at the the handle part (2) are arranged. Probe tip open or closed and im 2. Device according to claim 1, characterized by small diameter probes when used in indicates that the probe (3) is completely ungecig-grip part that is used in modern xryosurgery facing end has a hollow, double, because, due to the inadequate heat plating Has shaft (11), which vacuum insulation, vacuum-insulated substantial amounts of liquid gas is. steam and therefore often insufficient cold 3. Apparatus according to claim 2, since performance, economy and safety for one indicates that the handle part (2) has been used in a successful operation. zen (18) passes into the shaft (11) of the 25 The invention is based on the object of a Probe (3) fits and protrudes into this. to develop a cryosurgical device that uses the 4. Device according to one of claims 1 requirements in modern human medicine entbis 3, characterized in that speaks to and for the operation of open and ge-handle part (2) both an open and a closed probe, also small in diameter closed probe (3) can be connected. 30 is suitable. This object is achieved in that concentrically around the refrigerant supply line first vacuum insulation, then the refrigerant return line, then another vacuum insulation and the handle part arranged as the outer jacket is. The invention relates to a device for by using the universal device according to the invention Cryosurgery with a replaceable on one of the multilayered insulation around the refrigerant handle part with supply line attached to the cryosurgical probe, in which the refrigerant line one of a refrigerant reservoir through 40 are arranged concentrically to each other and this leading to the probe refrigerant supply line between the refrigerant supply line and the and a refrigerant return line, which also leads through this, vacuum insulation medium return line, where each refrigerant line is located, it is now possible to use one per flow is surrounded by thermal insulation. flow cross-section maximum amount of liquid gas With today's high demands on the 45 cold and unevaporated to a probe and Safety, refrigeration capacity and economy the essentially evaporated refrigerant return cryosurgical Devices in human medicine do not get cold, but if possible with room standing the problem of having a liquid gas as low as possible for those at the place where it escapes vapors from a storage container to a safe for people and equipment, in the Discharge tissue to an open or closed evaporative 5 ° atmosphere. Due to the inventive design of the Leiwas, especially with small diameter probe parts and refrigerant guidance, it is now very difficult, and the liquid gas that is essentially vaporized in the chamber, even with small diameter probes, is possible not cold, but to achieve maximum cooling capacity and if possible at room temperature, for at the place 55 through, z. B. in the treatment of an adenoma of escaping people and appa or carcinoma, a sure cell-killing rateteile harmless to def in the atmosphere freezing rate of about 200 ° C / min. as well as let. This poses the particular problem of achieving an acceptable freezing depth. All of this for carrying the liquefied gas and the essentially maximum refrigeration capacity is therefore so essential in the case of small, appa-meter probes that are used in the transparent vaporized liquefied gas, because z. B. with rate and line parts, including the handle part, with a probe closed at the tip, the lead parts of which lead through this, in particular tip, is spherical and a special if the handle part is replaceable and has a knife of 4 mm, at best Freezing depths form a complicated part of the apparatus, so to form 1 to 1.5 mm, at a constant temperature that they ^{are achieved according to these requirements of minus 196 °} C. at the top. can. With a closed probe whose A cryosurgical device is known- the tip has a diameter of 16 mm the (French patent 1513 732), in which under these conditions at best a freezer