Method and device for heat treatment of body tissue
AssigneeProstaLund Operations AB
InventorMagnus Bolmsjö
Life of this patent
Estimating the term…
Abstract
A device for heat treatment of prostate, comprising a treatment catheter with a fluid reservoir and heating means which is arranged within the treatment catheter and emits electromagnetic radiation for heating of the surrounding bodily tissue. The fluid reservoir constitutes an integrated part of the catheter for treatment and is positioned in the catheter so that, when inserted in a patient, it extends to cover the area heated by the heating means between the prostatic apex and bladder neck. The fluid reservoir also constitutes a closed chamber which is connectable via a channel passing through the catheter for treatment. A stop for the heat-absorbing means is embodied distal to said heating means and distal to said heat reservoir.
Claims40
A catheter for insertion into a urethra to perform heat treatment of a prostate which surrounds a prostatic urethra of the urethra in a human being, comprising:
- an antenna located at a position within the catheter adjacent to the prostatic urethra and the prostate upon insertion of the catheter into the urethra to a treatment position at which the treatment is performed, the antenna emitting electromagnetic radiation to heat at least a portion of the prostate surrounding a portion of the prostatic urethra;
- a fluid reservoir within the catheter surrounding the antenna and located to extend along a portion of the prostatic urethra upon positioning the catheter in the treatment position, the fluid reservoir for containing fluid surrounding the antenna to absorb heat from the antenna and from some of the emitted electromagnetic radiation and to apply that absorbed heat through the catheter to the prostatic urethra and prostate tissue surrounding the reservoir;
- a feed cable extending along the catheter from a position at an exterior of the urethra, the feed cable operatively connected to the antenna to conduct energy to the antenna, the feed cable emitting heat as a result of conducting energy to the antenna;
- a cooling channel within the catheter and extending along the feed cable, the cooling channel for conducting cooling fluid to remove the heat emitted from the feed cable and to protect the urethra and the tissue surrounding the feed cable from the heat emitted from the feed cable;
- a delimiter separating the fluid reservoir from the cooling channel;
- and
- a channel extending through the delimiter for conducting fluid into and out of the fluid reservoir.
A method for heat treating a prostate which surrounds a prostatic urethra of a urethra in a human being by using a catheter having an electromagnetic radiation emitting antenna and a feed cable connected to the antenna and extending along the catheter, comprising:
- inserting the catheter into the urethra to a treatment position at which the antenna is adjacent to the prostatic urethra and the prostate;
- energizing the antenna to emit electromagnetic radiation to heat at least a portion of the prostate surrounding a portion of the prostatic urethra;
- surrounding the antenna with fluid in a reservoir to absorb heat from the antenna and from some of the emitted electromagnetic radiation and to apply that absorbed heat through the catheter to a portion of the prostatic urethra and a portion of the prostate surrounding the prostatic urethra;
- conducting energy to the antenna through the feed cable;
- emitting heat from the feed cable as a result of conducting the energy through the feed cable;
- circulating cooling fluid within the catheter along the feed cable to remove heat emitted from the feed cable to protect the urethra and the tissue surrounding the feed cable from the heat emitted by the feed cable;
- and
- separating the cooling fluid circulating along the feed cable from the fluid surrounding the antenna.
Dependencies are inferred from the claim text.