Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Reexamination Certificate
1998-06-09
2001-06-05
Kennedy, Sharon (Department: 3763)
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
C607S101000
Reexamination Certificate
active
06241702
ABSTRACT:
This invention relates to a transurethral needle ablation device with cystoscope and method for the treatment of conditions of the prostate in human males.
Benign prostatic hypertrophy or hyperplasia (BPH) is a common medical problem associated with aging men. Surgical procedures heretofore utilized to correct this problem have been expensive, time consuming and painful. In addition, such surgical procedures can have many undesirable side effects. There is therefore a need for a device and method which overcomes theme disadvantages.
In general, it is an object of the present invention to provide a transurethral needle ablation device with cystoscope and method which can be utilized for the treatment of conditions of the prostate of the human male and particularly BPH.
Another object of the invention is to provide a device and method of the above-character which utilizes radio frequency energy.
Another object of the invention is to provide a device and method of the above-character in which the urethral wall is protected from radio frequency energy during ablation.
Another object of the invention is to provide a device and method of the above-character in which the needle electrode cannot penetrate the insulating sleeve.
Another object of the invention is to provide a device and method of the above-character in which controls are provided to prevent undesired destruction of tissue.
Another object of the invention is to provide a device and method of the above-character in which many safety features are provided.
Another object of the invention is to provide a device of the above-character in which the insulating sleeve can be withdrawn without displacing the location of the needle electrode.
Another object of the invention is to provide a device and method of the above-character in which tenting of the urethral wall is minimized.
Another object of the invention is to provide a device and method of the above-character in which the length of the needle electrode exposed within the prostate and the positioning of the insulating sleeve with respect to the needle electrode can be preset before the device is introduced into the patient.
Another object of the invention is to provide a device and method of the above-character in which a brake mechanism in provided to retain the needle electrode in position when the insulating sleeve is being retracted.
Another object of the invention is to provide a device and method which can be readily utilized by the physician performing the procedure.
Another object of the invention is to provide a device and method of the above-character which permits the use of conventional cystoscopes.
Another object of the invention is to provide a device and method of the above-character in which an integral cystoscope is provided.
Another object of the invention is to provide a device and method of the above-character which is minimally invasive, efficacious and low in cost.
Another object of the invention is to provide a device and method of the above-character which can be utilized for selectively ablating prostatic tissue.
Another object of the invention is to provide a device and method of the above-character which sakes it possible to deliver low level radio frequency power directly to a very localized area of the prostate.
Another object of the invention is to provide a device and method of the above-character in which the device can be positioned by the use of transrectal ultrasound or direct vision.
Another object of the invention is to provide a device and method of the above-character in which safety is assured by monitoring urethral temperatures.
Another object of the invention is to provide a device of the above-character in which large lesions of extensive coagulative necrosis can be achieved.
Another object of the invention is to provide a device and method of the above-character in which patients can be treated without the use of anesthesia except for possibly a local anesthetic.
Another object of the invention is to provide a device and method in which the needle electrode can be introduced at substantially right angles to the longitudinal axis of the catheter and be caused to penetrate the urethral wall and extend directly into the prostatic tissue.
Another object of the invention is to provide a device and method of the above-character in which at least two lesions can be formed substantially simultaneously in the prostatic tissue.
Another object of the invention is to provide a device and method of the above-character in which the needle electrodes can be redeployed readily to create additional lesions in the same prostate.
Another object of the invention is to provide a device and method of the above-character in which the ablation to form lesions can be performed with great precision.
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Baker, Jr. James A.
Edwards Stuart D.
Lax Ronald G.
Lundquist Ingemar H.
Sharkey Hugh R.
Flehr Hohbach Test Albritton & Herbert LLP
Kennedy Sharon
Vidamed, Inc.
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