CS217449B1 - Exchangeable directly cooled terminal for cryosurgical tools - Google Patents

Exchangeable directly cooled terminal for cryosurgical tools Download PDF

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Publication number
CS217449B1
CS217449B1 CS500280A CS500280A CS217449B1 CS 217449 B1 CS217449 B1 CS 217449B1 CS 500280 A CS500280 A CS 500280A CS 500280 A CS500280 A CS 500280A CS 217449 B1 CS217449 B1 CS 217449B1
Authority
CS
Czechoslovakia
Prior art keywords
replaceable
outer
contact surface
inner
end piece
Prior art date
Application number
CS500280A
Other languages
Czech (cs)
Inventor
Alexandr Belling
Frantisek Horal
Zdenek Malek
Vladimir Matena
Petr Psutka
Original Assignee
Alexandr Belling
Frantisek Horal
Zdenek Malek
Vladimir Matena
Petr Psutka
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 Alexandr Belling, Frantisek Horal, Zdenek Malek, Vladimir Matena, Petr Psutka filed Critical Alexandr Belling
Priority to CS500280A priority Critical patent/CS217449B1/en
Publication of CS217449B1 publication Critical patent/CS217449B1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • A61B2018/0231Characteristics of handpieces or probes
    • A61B2018/0262Characteristics of handpieces or probes using a circulating cryogenic fluid
    • A61B2018/0268Characteristics of handpieces or probes using a circulating cryogenic fluid with restriction of flow
    • A61B2018/0275Characteristics of handpieces or probes using a circulating cryogenic fluid with restriction of flow using porous elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • A61B2018/0231Characteristics of handpieces or probes
    • A61B2018/0262Characteristics of handpieces or probes using a circulating cryogenic fluid
    • A61B2018/0268Characteristics of handpieces or probes using a circulating cryogenic fluid with restriction of flow
    • A61B2018/0281Characteristics of handpieces or probes using a circulating cryogenic fluid with restriction of flow using a tortuous path, e.g. formed by fins or ribs

Description

DESCRIPTION OF THE INVENTION OF THE COPYRIGHT 217449 (II) (Bl)

(22) Registered 15 07 80 (21) (PV 5002-80) (51) Int. Cl? A 61 F 7/00 (40) Published 28 05 82

EXIT FOR INVENTIONS (45) Issued 15 02 85

AND DISCOVERY. BELLING ALEXANDR ing., PRAGUE, HORAL FRANTIŠEK, KOUNICE,

Author of the invention MÁLEK ZDENĚK doc. Prof. RNDr. CSc., MATENA VLADIMIR prom. phys.,

PSUTKA PETR ing., PRAGUE (54) Directly cooled, replaceable cryosurgical tip 1

BACKGROUND OF THE INVENTION The present invention relates to a directly cooled cryosurgical instrument tip. The latest cryobiological research has shown that the most effective cryodestructure of surgical surgeries occurs when the lowest possible surgical end temperature is used, which is established in the shortest possible time from the moment the device is put into operation. to achieve maximum cooling power at the operating end. In practice, the heat exchanger housed in the operating apparatus is most commonly used, while the operating terminals are detachable in thermal contact with the tool as passive elements that create a considerable heat resistance in the heat flow path from the tissue to the exchanger, given both by the transition between the replaceable terminal and the tool and by the thermal resistance custom endings. It follows from a simple calculation that for example a silver operating terminal with a diameter of 5 mm and a length of 50 mm produces a temperature difference of about 100 ° C at a heat flow of 15 J / s. The present invention overcomes the drawbacks of the known endings of cryosurgical instruments, with maximum efficiency being achieved in particular by the fact that the exchanger contains a porous filler of material with anisotropic thermal properties and is located directly in the replaceable end piece.

The essence of the directly cooled replaceable end cap is that the heat exchanger heat exchanger is arranged in a replaceable end cap provided with a coolant inlet channel and coolant ducts, the outer carcass interface of the replaceable tip being detachably connected to the interchangeable end face of the replaceable end cap. and a liquid coolant supply tube in which the valve is mounted, respectively, arranged in the screw portion of the replaceable end support carcass is connected to the interchangeable terminal inlet duct, and the interchangeable end connection ducts are connected to the carrier carcass passage, the internal contact surface of the replaceable end being abutted to the outer contact surface of the carrier and is provided with a cover.

The superior effect of the present invention is achieved by direct cooling a replaceable cryosurgical tool tip according to the present invention, in particular by arranging the heat exchange material directly in the replaceable cryosurgical tip, thereby reducing the heat resistance between the replaceable tip surface and the coolant. The heat transfer of the cooled tissue to the coolant is improved. An embodiment of a directly cooled interchangeable cap of a cryosurgical instrument according to the invention is shown schematically in the accompanying drawings, wherein the assembly of the working part of a cryosurgical instrument in the longitudinal section is shown in FIG. 1, the interchangeable end cap is shown in FIG. 4 is a partial longitudinal sectional view of the plug; and FIG. 9 shows the valve in longitudinal section.

The replaceable tip 20 is formed by a cover 29 with a needle 26 in which the heat exchange material 2 is located. The cover 22 is connected to a flange 21 in which the ducts 29 are provided. The inlet duct 27 and, optionally, the inner seal 23 and the outer gasket 24. The interchangeable tip 20 abuts the inner contact surface 22 on the outer contact surface 16 of the carrier frame J. Replaceable end caps 20. Carrier frame 1 a coolant tube 10 passes into the replaceable end cap 20. A valve 40 is disposed in the tube 10.

The valve 40 is formed by a sealing ring 41 on which the sealing ball 42 abuts, which rests against the perforated guide ring 43. In the lower part of the valve 40 there is a perforated retaining ring 45 supported by the spring 44. a collecting duct 2 and collecting ducts 6. A thermometer 2-dip winding 8 is placed on the support frame 1. To provide vacuum insulation, a housing 12 is provided with a lid 2 optionally with a vacuum housing 13 delimiting the vacuum space 14. The coolant tube H is fed into the cap.

Also, the electrical conduits to the thermometer 2a for the heating winding 8 are led out through the coolant pipe 11. The support frame V is placed in a tube 15 which is evacuated. The tight connection of the carrier frame 1 and the replaceable terminal 20 is provided by the screw 2 of the replaceable terminal 20 by the internal abutment lip 2. or an outer bearing lip 4.

For the gas-tight closing of the replaceable terminal 20, a plug 22 is provided, which is provided with a screw 31 of the plug 20, a contact surface 32 abutting the inner contact surface 22 or the lip 33 of the plug 30 abutting the outer seal 24. Alternatively, the valve 40 and the needle 26 can be omitted or some of the seals, either the outer seal 24 or the inner seal 23 or both seals. This also applies to the inner abutment lip 2 and the outer abutment lip 4 and the lip 33 of the stopper 30.

The device function is as follows:

A replaceable brace 20 is attached to the carrier frame 1. The refrigerant enters the replaceable terminal 20 through a tube 10 that passes through the frame 1 of the replaceable terminal 20. The heat transfer occurs in the heat transfer material 28 within the replaceable terminal 20. The cooling coils and replaceable terminals 20 are interconnected through channels 25 through collecting ducts 7 and coolant drain 11. The heating of the replaceable terminal 2Δ is ensured by the heating coil 8. The temperature of the replaceable terminal 20 is sensed by a thermometer 2 ·

Claims (6)

  1. The gas-tight connection of the replaceable end piece 20 to the carrier frame 1 provides an inner contact surface 22 and an outer contact surface 16, which are optionally provided with an internal abutment face and an outer abutment lip 1 and an inner seal 23 and an outer seal 24. An exchangeable tip. 0 is closed by a cover 29 in which the needle 26 can be received. In this case, the needle 26, after coupling the replaceable end piece 20 to the carrier frame 1, moves the sealing ball 42 or flap to allow the refrigerant to pass through the sealing ring 41. Pressing the sealing ball 42 ensures a perforated guide ring 43 through spring 44 which is supported on the perforated thrust ring 45. The valve 40 permits the exchange of interchangeable tips 20 while maintaining a working overpressure in the tube 10 while preventing condensation of atmospheric moisture inside the thimble 10. Flange 21 abutting the inner by threading the frame 1 of the replaceable end cap 20 by internal sealing 23 and / or by an outer seal 24, for example from Teflon, the communication between the supplied and the exhausted and the cooling and the outer atmosphere. The sterilization of the replaceable terminals 20 allows the plug 30 to be shown schematically in FIG. 4, which, by means of a screw 31, secures the externally sealing the inlet duct 27 and the connecting ducts 25 by means of the cutting edge 33 of the plug 30 on the outer seal 24. The sealing of the replaceable tip 20 to the carrier frame 1 or to the plug 30 can alternatively be provided by an inner seal 23 and / or by an external seal 24 against the outer contact surface 16 or the contact surface 32, or by abutting the inner contact surface 22 on the outer surface 16 or on the contact surface 32 by means of a detachable connection formed by, for example, the frame bolt of the replaceable end cap 20 and the thread in the flange 21 of the replaceable tip 20. The condition of the tightness is that the surface lines of the inner contact surface 22 of the interchangeable end piece 20 and the surface line of the outer contact surface 16 of the frame 1 of the interchangeable end piece 20 intersecting the axis of the interchangeable end piece 20 always bear the same angle with these axes. exemplary embodiment of a seal between the frame carrier and replacement nozzle 20 and the exchange-ionisable terminal 20 is the replacement of the inner seal 23 and outer or těsnšáí 24 břitya replacement inner abutment edge ^, or outer edge 4 dosedaeího seals. The heat exchange material 28 is the most suitable porous metal filler, the arrangement of which provides high thermal conductivity in directions perpendicular to the surface of the replaceable tip 20 at reduced thermal conductivity in the flow direction of the coolant by an exchanging material. the surface of the replaceable tip 20 (for example, a proctological operation) is a parallel arrangement of annular rings of metal, thermally conductive meshes or perforated films which, by their outer circumference, are in thermal contact (e.g., soldering) to the inner surface of the replaceable tip cap 29. the need to provide the main cooling power to the front end of the replaceable tip 20 (e.g., dermatological or gynecological operations), it is desirable to form the heat transfer material 28 from, for example, a spiral coil p a metal mesh ring around an interchangeable end axis 20 or a coaxial cylinder system, or a concentric hemisphere system formed of metal mesh or perforated metal foils. OBJECT OF THE INVENTION
    A directly cooled interchangeable end cap of a cryosurgical instrument, characterized in that the heat exchanger with heat exchange material (28) is arranged in a replaceable end piece (20) provided with a coolant inlet duct (27) and coolant ducts (25), wherein the outer surface (16) ) of the frame of the replaceable end cap carrier (1) is detachably connected 217449 4 with the inner contact surface (22) of the replaceable end cap (20) and the tube (10) for supplying the liquid coolant in which the valve (40) is optionally mounted. arranged in the screw portions of the replaceable end cap carrier (1) is connected to the inlet duct (27) of the replaceable end caps (20) and the connecting ducts (25) of the replaceable end cap (20) are connected to the carrier duct (5) of the carrier (1), the inner contact surface (22) of the replaceable terminal (20) abuts the outer contact surface (16) of the carrier (1) and is provided with a cover (29).
  2. 2. Directly cooled end piece according to claim 1, characterized in that the surface lines of the inner surface (22) of the replaceable end piece (20) and the surface line of the outer contact surface (16) of the carrier (1) of the interchangeable end piece (20) intersect a common interchangeable end axis ( 20) and the carcass frame (1) of the replaceable end cap (20) and form an equal angle with the axis, wherein the inner contact surface (22) of the replaceable end cap (20) is attached to the outer carcass contact surface (1) of the replaceable end cap (20) dismountable joint.
  3. A directly cooled end piece according to claim 1, characterized in that the inner contact surface (22) of the replaceable end piece (20) is provided with an outer seal (24) and / or an inner seal (23) and / or an outer frame (16) of the carrier frame. (1) the interchangeable end piece (20) is provided with an outer bearing lip (3).
  4. 4. Directly cooled end piece according to claim 1, characterized in that the inner contact surface (22) of the replaceable end cap (20) is provided with an outer abutment lip (24) and / or an inner abutment lip (23) and / or an outer contact surface (16) of the carcass. The carrier (1) of the replaceable end cap (20) is provided with an outer seal (4) and / or an inner seal (3).
  5. A directly cooled end piece according to claim 1, characterized in that a needle (26) is attached to the inner surface of its cover (29) and a valve is disposed in the axis of the tube (10) in the axis of the replaceable end piece (20). (40). 6 »Directly cooled end piece according to claim 1, characterized in that the replaceable end piece (20) is provided with a stopper (30) which is arranged as detachable and its contact surface (32) is identical to the inner contact surface (22) of the exchangeable end piece. (20) and / or the plug (30) is provided with a cutting edge (33) whose diameter corresponds to the median diameter of the outer seal (24) of the replaceable end cap (20).
  6. 7. A directly cooled end piece according to claim 1, wherein the heat transfer material is formed of thermally conductive metal mesh or perforated films, for example, silver or copper, which are the outer circumference in thermal contact with the inner surface of the replaceable end cap (29). 20). 2 sheets of drawings
CS500280A 1980-07-15 1980-07-15 Exchangeable directly cooled terminal for cryosurgical tools CS217449B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CS500280A CS217449B1 (en) 1980-07-15 1980-07-15 Exchangeable directly cooled terminal for cryosurgical tools

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
CS500280A CS217449B1 (en) 1980-07-15 1980-07-15 Exchangeable directly cooled terminal for cryosurgical tools
DE19813124167 DE3124167A1 (en) 1980-07-15 1981-06-19 "Directly cooled tail of a cryosurgical, instrument '
GB8119618A GB2079608B (en) 1980-07-15 1981-06-25 Directly cooled tip cryosurgical apparatus
DD23176181A DD230150A3 (en) 1980-07-15 1981-07-08 Directly refrigerible interchangeable end piece of a cryo-surgical instrument
AU72694/81A AU7269481A (en) 1980-07-15 1981-07-09 Cryogenic apparatus for surgery
FR8113606A FR2486799A1 (en) 1980-07-15 1981-07-10 Direct cooling terminal piece for cryotherapy instrument
JP56109549A JPS5743736A (en) 1980-07-15 1981-07-15 Direct cooling tip of freeze surgical apparatus

Publications (1)

Publication Number Publication Date
CS217449B1 true CS217449B1 (en) 1983-01-28

Family

ID=5394030

Family Applications (1)

Application Number Title Priority Date Filing Date
CS500280A CS217449B1 (en) 1980-07-15 1980-07-15 Exchangeable directly cooled terminal for cryosurgical tools

Country Status (7)

Country Link
JP (1) JPS5743736A (en)
AU (1) AU7269481A (en)
CS (1) CS217449B1 (en)
DD (1) DD230150A3 (en)
DE (1) DE3124167A1 (en)
FR (1) FR2486799A1 (en)
GB (1) GB2079608B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2668699A1 (en) * 1990-11-05 1992-05-07 France Prod Oxygenes Co Instrument for cryosurgery
US10531981B2 (en) 2013-01-25 2020-01-14 Youmedical B.V. Device for non-surgical cold treatment of disorders
PL2759272T3 (en) * 2013-01-25 2019-06-28 Youmedical B.V. Device for non-surgical cold treatment of disorders

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2982112A (en) * 1957-02-27 1961-05-02 Frederick G Keyes Inc Refrigeration apparatus for contact cooling of small areas
NL129743C (en) * 1962-04-30 1900-01-01
US3398738A (en) * 1964-09-24 1968-08-27 Aerojet General Co Refrigerated surgical probe
US3477434A (en) * 1965-06-02 1969-11-11 Cvi Corp Cryosurgical apparatus
US3575176A (en) * 1968-10-21 1971-04-20 Frigitronics Of Conn Inc Rechargeable cryosurgical instrument
US3548829A (en) * 1968-10-21 1970-12-22 Frigitronics Of Conn Inc Cryosurgical instrument
DE2321089B2 (en) * 1973-04-26 1976-12-30 Waermeisolierte, flexible line as coaxial double line
US4206760A (en) * 1978-06-30 1980-06-10 Cryomedics, Inc. Bearing coupling for enabling the tip of a cryosurgical instrument to be rotated independently of inlet and exhaust tubes

Also Published As

Publication number Publication date
GB2079608A (en) 1982-01-27
JPS5743736A (en) 1982-03-11
GB2079608B (en) 1984-10-31
FR2486799A1 (en) 1982-01-22
AU7269481A (en) 1982-01-21
DD230150A3 (en) 1985-11-27
DE3124167A1 (en) 1982-02-25

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