Method of manufacture of a transurethral ultrasound applicator for prostate gland thermal therapy

• US 5,733,315 A
• Filed: 11/01/1994
• Issued: 03/31/1998
• Est. Priority Date: 11/13/1992
• Status: Expired due to Term

• Current Assignee: Dornier MedTech America Incorporated (Temasek Holdings Pte Ltd. (Investment Management)), Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Burdette, Everette C., Diederich, Chris J.
• Primary Examiner(s): Bahr, Jennifer
• Assistant Examiner(s): WINAKUR, ERIC FRANK
• Application Number:
  US08/332,997
• Time in Patent Office: 1,246 Days
• Field of Search: 128/662.03, 128/662.06, 601/2, 601/3, 607/96, 607/97, 607/104, 607/154, 607/155, 607/156, 604/22
• US Class Current: 601/97
• CPC Class Codes: A61B 18/18 by applying electromagnetic radiation, e.g. microwaves radiation therapy A61N5/00
• CPC Class Codes: A61B 18/1815 using microwaves
• CPC Class Codes: A61B 90/04 Protection of tissue around surgical sites against effects of non-mechanical surgery, e.g. laser surgery protection of eyes against laser radiation A61F9/022
• CPC Class Codes: A61N 5/04 Radiators for near-field treatment
• CPC Class Codes: A61N 5/045 specially adapted for treatment inside the body
• CPC Class Codes: A61N 7/02 Localised ultrasound hyperthermia hyperthermia in general A61F7/00

Abstract

An apparatus for applying thermal therapy to a prostate gland, comprising a support tube having a longitudinal central passageway, a power lead channeled through the longitudinal central passageway and an ultrasound crystal disposed around at least part of the support tube. The ultrasound crystal is coupled to the power lead which provides the power to energize the ultrasound crystal and generate ultrasound energy providing thermal therapy to the prostate gland. The ultrasound crystal further includes inactivated portions for reducing ultrasound energy directed to the rectal wall of the patient. A sealant is disposed in contact with the ultrasound crystal allowing vibration necessary for efficient ultrasound energy radiation for the thermal therapy to the prostate gland.

Claims

1. An apparatus for applying thermal therapy to a prostate gland, comprising:

a support tube having a longitudinal central passageway;

a power lead for providing power and said power lead channeled through said longitudinal central passageway;

an ultrasound crystal disposed around at least part of said support tube and said ultrasound crystal coupled to said power lead which provides the power to energize said ultrasound crystal and generate ultrasound energy providing thermal therapy to the prostate gland, said ultrasound crystal further including means for inactivating selected portions of said ultrasound crystal for reducing ultrasound energy directed to the rectal wall of the patient; and

a sealant disposed in contact with said ultrasound crystal allowing vibration necessary for efficient ultrasound energy radiation for the thermal therapy to the prostate gland.

2. The apparatus as defined in claim 1 further including an outer covering disposed over said support tube, said outer covering comprising a shrink wrap material.

3. The apparatus as defined in claim 1 wherein said ultrasound crystal comprises a cylindrical shape concentrically disposed about said support tube.