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Applicator for microwave radiation treatment

a radiation treatment and microwave technology, applied in the field of surgical treatment devices, can solve the problems of serious blood loss from severed tissue, unsuitable,

Inactive Publication Date: 2005-06-30
EMCISION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] Generally, the needles will be disposed mutually parallel; they can conveniently be formed of steel.
[0013] Theoretical calculations show that, in order to raise the temperature of body tissues by 30° C., an applicator operating with 100% efficiency would need to deliver about 10 watts of microwave power, assuming that the volume t

Problems solved by technology

In surgical procedures performed on deep-seated body tissues and organs, e.g. the liver, blood loss from severed tissue can be a serious problem.
Widespread heating can be achieved relatively easily, but this is not desirable.

Method used

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  • Applicator for microwave radiation treatment
  • Applicator for microwave radiation treatment
  • Applicator for microwave radiation treatment

Examples

Experimental program
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Embodiment Construction

[0018] Referring now to the drawings, a power and control unit (1) supplies up to 500 watts of microwave power via a coaxial cable (2) to a rectangular applicator (3). The head (3) has a handle (4) through which cable (2) passes, and an array (5) of retractable needles which are designed to provide precise irradiation of the tissue in the vicinity of the selected incision point. The unit (1) also contains a switching mechanism and control electronics to energise and release the array of needles.

[0019] As shown in FIGS. 2 and 3, the applicator head (3) includes a rectangular waveguide (6) around the periphery of which the needles of array (5) are located. The waveguide is a TM11 mode waveguide and is filled with a suitable dielectric. For irradiation of a region 5 cm long by 2 cm wide, the rectangular waveguide should have corresponding dimensions and may be filled with a medium whose dielectric constant (∈x) is about 50. These parameters dictate that the microwave operating frequen...

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PUM

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Abstract

A device for restricting the loss of blood during a surgical procedure is disclosed. The device generates localized heating in an organ or volume of tissue and includes an applicator that is positioned against an organ or tissue to be treated, an array of retractable needles that deliver irradiating energy in the vicinity of a selected incision point; a switching mechanism in communication with the needles for energizing and causing movement of the needles and a power unit for supplying irradiating power to the needles when extended into the organ or tissue.

Description

RELATED APPLICATIONS [0001] This application is a divisional of U.S. patent application Ser. No. 10 / 625,232, filed Jul. 22, 2003, which is a continuation of U.S. patent application Ser. No. 09 / 762,285, filed Apr. 6, 2001, now U.S. Pat. No. 6,628,990, which is a national stage application of International Patent Application No. PCT / GB99 / 02559, filed Aug. 4, 1999, which claims priority from GB Patent Application No. 9817078.0, filed Aug. 5, 1998.FIELD OF THE INVENTION [0002] This invention relates to a device for use in the surgical treatment of human or non-human animals. In particular, it is concerned with a device for use in controlling excessive bleeding from severed tissue during surgical procedures, especially on the patient's liver. BACKGROUND OF THE INVENTION [0003] It is well known that raising the temperature of body tissue tends to reduce blood flow within the tissue. If the temperature is raised by 20-30° C. above normal, blood flow within the tissue is greatly diminished....

Claims

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Application Information

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IPC IPC(8): A61B18/18A61N5/04
CPCA61B18/18A61N5/045A61N5/04A61B18/1815
Inventor HABIB, NAGY ADLYSANGSTER, ALAN JOHN
Owner EMCISION LTD