DE19724082A1 - Cryoprobe for drawing heat from region of human body with probe body - Google Patents

Cryoprobe for drawing heat from region of human body with probe body

Info

Publication number
DE19724082A1
DE19724082A1 DE1997124082 DE19724082A DE19724082A1 DE 19724082 A1 DE19724082 A1 DE 19724082A1 DE 1997124082 DE1997124082 DE 1997124082 DE 19724082 A DE19724082 A DE 19724082A DE 19724082 A1 DE19724082 A1 DE 19724082A1
Authority
DE
Germany
Prior art keywords
probe body
probe
cryoprobe
lumen
region
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
DE1997124082
Other languages
German (de)
Inventor
Karl-Heinz Otto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tricumed Medizintechnik GmbH
Original Assignee
Tricumed Medizintechnik GmbH
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 Tricumed Medizintechnik GmbH filed Critical Tricumed Medizintechnik GmbH
Priority to DE1997124082 priority Critical patent/DE19724082A1/en
Publication of DE19724082A1 publication Critical patent/DE19724082A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00022—Sensing or detecting at the treatment site
    • A61B2017/00084—Temperature
    • A61B2017/00092—Temperature using thermocouples
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
    • A61B2018/00041—Heating, e.g. defrosting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053—Mechanical features of the instrument of device
    • A61B2018/00214—Expandable means emitting energy, e.g. by elements carried thereon
    • A61B2018/0022—Balloons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
    • A61B2018/0212—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument inserted into a body lumen, e.g. catheter

Landscapes

  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Otolaryngology (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

The cryoprobe has a probe body (10), one lumen for supplying a freezing mixture in the probe body, and a second lumen (12) for discharging the freezing mixture from the probe body. A probe tip (16) is fitted in the probe body. A temperature measuring unit (18) is fitted in the probe body, and a unit is provided for heating the probe body. The unit for heating the probe body is a resistance wire (20), and is applied on the wall of the probe body.

Description

Die Erfindung betrifft eine Kryosonde, d. h. eine zum Entziehen von Wärme aus einem Bereich des menschlichen Körpers dienende Vorrichtung.The invention relates to a cryoprobe, i. H. one for Extract heat from an area of human Body-serving device.

Die Kryotechnik, also die Entziehung von Wärme aus ei­ nem bestimmten Bereich des menschlichen Körpers findet in der Medizin zunehmend Interesse. Ein Anwendungsfall ist die Kryoläsion, bei der ein chirurgisch freigeleg­ ter peripherer Nerv zur Schmerzbekämpfung stark gekühlt wird. Ein anderer Anwendungsfall ist die Bekämpfung von Tumoren.Cryogenics, i.e. the extraction of heat from egg in a specific area of the human body growing interest in medicine. An application is the cryosal lesion where one is surgically exposed The peripheral nerve is strongly cooled to combat pain  becomes. Another application is the fight against Tumors.

Bei der Anwendung der Kryotechnik ist es von Bedeutung, daß ein bestimmtes "Kälteprofil" gefahren werden kann, die Temperatur, und die Zeitdauer, über die die ge­ wünschte Temperatur erreicht wird, also exakt gesteuert werden kann.When using cryogenics it is important that a certain "cold profile" can be driven, the temperature, and the length of time over which the ge desired temperature is reached, that is precisely controlled can be.

Der Erfindung liegt die Aufgabe zugrunde, eine Kryoson­ de zu schaffen, die eine derartige Steuerung des Tempe­ raturverlaufs ermöglicht.The invention has for its object a cryoson de to create such a control of the tempe ratur history.

Erfindungsgemäß wird diese Aufgabe gelöst durch einen Sondenkörper, ein zum Zuführen eines Kältemittels in den Sondenkörper dienendes erstes Lumen, ein zum Abfüh­ ren des Kältemittels aus dem Sondenkörper dienendes zweites Lumen, eine auf den Sondenkörper aufgebrachte Sondenspitze, eine in den Sondenkörper eingebrachte Temperaturmeßeinrichtung und eine Einrichtung zum Be­ heizen des Sondenkörpers.According to the invention, this object is achieved by a Probe body, one for supplying a refrigerant in the first lumen serving the probe body, one for removal the refrigerant from the probe body second lumen, one attached to the probe body Probe tip, one inserted into the probe body Temperature measuring device and a device for loading heat the probe body.

Die Einrichtung zum Beheizen des Sondenkörpers kann als ein auf dessen Wandung aufgebrachter Widerstandsdraht ausgebildet sein.The device for heating the probe body can be used as a resistance wire attached to its wall be trained.

Die Erfindung wird im folgenden anhand einer Zeichnung erläutert. Dabei zeigt die einzige Figur eine solche Kryosonde in einer schematischen Schnittansicht.The invention is described below with reference to a drawing explained. The only figure shows one Cryoprobe in a schematic sectional view.

Die Kryosonde besteht aus einem Sondenkörper 10, einem in den Sondenkörper 10 über eine Drossel 22 mündenden ersten Lumen 12, einem das erste Lumen 12 konzentrisch umgebenden zweiten Lumen 14, einer auf den Sondenkörper 10 aufgebrachte Sondenspitze 16, einer in den Sonden­ körper 10 eingebrachte Temperaturmeßeinrichtung 18 und einem auf die Wandung des Sondenkörpers 10 aufgebrach­ ten Widerstandsdrahts 20.The cryoprobe consists of a probe body 10 , a first lumen 12 opening into the probe body 10 via a throttle 22 , a second lumen 14 concentrically surrounding the first lumen 12 , a probe tip 16 applied to the probe body 10 , and a temperature measuring device introduced into the probe body 10 18 and a resistance wire 20 applied to the wall of the probe body 10 .

Bei Verwendung der Kryosonde wird diese an den Bereich gebracht, dem Wärme zu entziehen ist, insbesondere also den chirurgisch freigelegten peripheren Nerven, bei dem eine Kryoläsion durchgeführt werden soll. Sodann wird durch das Innenlumen 12 des die beiden Lumen 12, 14 ausbildenden Katheters ein Kältemittel unter hohem Druck eingeführt. Dieses entspannt bei Passieren der Drossel 22, verdampft dort und kühlt dabei den Sonden­ körper 10 stark ab. Das entspannte (grasförmige?) Käl­ temittel wird sodann durch das das innere Lumen 12 um­ gebende äußere Lumen 14 abgeführt.When the cryoprobe is used, it is brought to the area from which heat is to be extracted, in particular, therefore, to the surgically exposed peripheral nerves in which a cryosal lesion is to be performed. Then, of the two lumens 12, 14 forming the catheter, a refrigerant introduced through the inner lumen 12 under high pressure. This relaxes when passing the throttle 22 , evaporates there and cools the probe body 10 strongly. The relaxed (grass-shaped?) Käl temmittel is then discharged through the inner lumen 12 to give outer lumen 14 .

Um eine genaue Regelung der Temperatur insbesondere der Sondenspitze 16 zu bewirken, ist auf die Sondenspitze 16 eine Temperaturmeßeinrichtung (ein Thermoelement) 18 aufgesetzt, das das jederzeitige Abfragen der Tempera­ tur, insbesondere der Sondenspitze über - nicht gezeig­ te - elektrische Leitungen nach außen erlaubt. Auf die­ se Weise kann ein bestimmtes Temperaturprofil abgefah­ ren werden.In order to effect a precise regulation of the temperature, in particular of the probe tip 16 (a thermocouple) 18 placed on the probe tip 16, a temperature measuring device which comprises at any time visits to the tempera ture over, in particular of the probe tip - to enable electrical leads to the outside - not gezeig te. In this way, a specific temperature profile can be avoided.

Um ein schnelleres Ansprechen der thermisch trägen Kryosonde zu bewirken, kann der Widerstandsdraht 20, der in die Wandung des Sondenkörpers 10 eingebracht ist, über - nicht gezeigte - Drähte mit elektrischer Energie versorgt werden, wodurch ein Aufheizen der Wan­ dung des Sondenkörpers erfolgt. In order to achieve a faster response of the thermally inert cryoprobe, the resistance wire 20 , which is introduced into the wall of the probe body 10 , can be supplied with electrical energy via wires (not shown), as a result of which the wall of the probe body is heated.

Auf diese Weise kann auch bewirkt werden, daß lediglich die Sondenspitze 16 abgekühlt wird, nicht aber der Son­ denkörper 10 als ganzes.In this way it can also be caused that only the probe tip 16 is cooled, but not the son denkörper 10 as a whole.

Der elektrische Widerstandsdraht 10 kann auch dazu ver­ wendet werden, während oder nach der Kryobehandlung ein Anfrieren des Sondenkörpers 10 an das anliegende Gewebe zu verhindern.The electrical resistance wire 10 can also be used to prevent the probe body 10 from freezing to the adjacent tissue during or after the cryoprotection.

Claims (2)

1. Kryosonde zum Entziehen von Wärme aus einem Bereich des menschlichen Körpers, gekennzeichnet durch
  • - einen Sondenkörper (10),
  • - ein zum Zuführen eines Kältemittels in den Sonden­ körper dienendes erstes Lumen (12),
  • - ein zum Abführen des Kältemittels aus dem Sonden­ körper dienendes zweites Lumen (14),
  • - eine auf den Sondenkörper (10) aufgebrachte Sonden­ spitze (16),
  • - eine in den Sondenkörper (10) eingebrachte Tempera­ turmeßeinrichtung (18), und
  • - eine Einrichtung zum Beheizen des Sondenkörpers (10).
1. Cryoprobe for extracting heat from an area of the human body, characterized by
  • - a probe body ( 10 ),
  • a first lumen ( 12 ) serving to supply a refrigerant into the probe body,
  • a second lumen ( 14 ) serving to discharge the refrigerant from the probe body,
  • - a probe tip ( 16 ) applied to the probe body ( 10 ),
  • - In the probe body ( 10 ) introduced temperature measuring device ( 18 ), and
  • - A device for heating the probe body ( 10 ).
2. Kryosonde nach Anspruch 1, dadurch gekennzeichnet, daß die Einrichtung zum Beheizen des Sondenkörpers (10) ein auf dessen Wandung aufgebrachter Widerstandsdraht (20) ist.2. Cryoprobe according to claim 1, characterized in that the device for heating the probe body ( 10 ) is a resistance wire ( 20 ) applied to the wall thereof.
DE1997124082 1997-06-07 1997-06-07 Cryoprobe for drawing heat from region of human body with probe body Withdrawn DE19724082A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1997124082 DE19724082A1 (en) 1997-06-07 1997-06-07 Cryoprobe for drawing heat from region of human body with probe body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997124082 DE19724082A1 (en) 1997-06-07 1997-06-07 Cryoprobe for drawing heat from region of human body with probe body

Publications (1)

Publication Number Publication Date
DE19724082A1 true DE19724082A1 (en) 1998-12-10

Family

ID=7831802

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1997124082 Withdrawn DE19724082A1 (en) 1997-06-07 1997-06-07 Cryoprobe for drawing heat from region of human body with probe body

Country Status (1)

Country Link
DE (1) DE19724082A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000059390A1 (en) * 1999-04-06 2000-10-12 Cryocath Technologies, Inc. Heater control of cryocatheter tip temperature
WO2003051214A1 (en) * 2001-12-18 2003-06-26 Boston Scientific Limited Cryo-temperature monitoring

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000059390A1 (en) * 1999-04-06 2000-10-12 Cryocath Technologies, Inc. Heater control of cryocatheter tip temperature
US6562030B1 (en) 1999-04-06 2003-05-13 Cryocath Technologies Inc. Heater control of cryocatheter tip temperature
WO2003051214A1 (en) * 2001-12-18 2003-06-26 Boston Scientific Limited Cryo-temperature monitoring
US6709431B2 (en) 2001-12-18 2004-03-23 Scimed Life Systems, Inc. Cryo-temperature monitoring
US8235976B2 (en) 2001-12-18 2012-08-07 Boston Scientific Scimed, Inc. Cryo-temperature monitoring

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: TRICUMED MEDIZINTECHNIK GMBH, 24143 KIEL, DE

8110 Request for examination paragraph 44
8139 Disposal/non-payment of the annual fee