Instrument and method for intraluminally relieving stenosis

Details Instrument and method for intraluminally relieving stenosis Instrument and method for intraluminally relieving stenosis

1991-01-14

1993-05-04

Shay, David M.

Surgery

Instruments

Light application

606 7, 606 12, 128398, 12866003, A61N 506, A61B 812

Patent

active

052076725

ABSTRACT:
An instrument for and method of effectively treating the prostatic urethra so as to relieve the symptoms associated with an enlarged urethra is disclosed. The tissue of at least selected portions of the prostate are compressed (preferably with a balloon inserted into the prostatic urethra so as to enhance hemostasis) and at least selected portions of the compressed tissue are directly irradiated (preferably with a laser beam transmitted from within the passageway in selected radial directions and moved along the prostatic urethra while exposing the tissue) so as to cause coagulation necrosis of selected portions of the compressed tissue so that as the tissue heals, the necrosed tissue slowly sloughs off during normal urination through the urinary tract so as to effectively remove the constricted portions of the prostatic urethra. Ultrasonic transducers are used from within the prostatic urethra to image the tissue as it is irradiated so as to monitor the procedure to insure proper exposure to the laser beam.

REFERENCES:
patent: 4445892 (1984-05-01), Hussein et al.
patent: 4672963 (1987-06-01), Barker
patent: 4779624 (1988-10-01), Yokoi
patent: 4887605 (1989-12-01), Angelsen et al.
"Use of Gas Jet Appositional Pressurization in Endoscopic Laser Photocoagulation" by Kimura et al IEEE Transactions on Biomed. Eng. vol. BME-25 No. 3 May 1978.

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