Server: Netscape-Enterprise/2.01 Date: Thu, 18 Dec 1997 20:08:03 GMT Accept-ranges: bytes Last-modified: Sat, 05 Apr 1997 01:25:34 GMT Content-length: 3192 Content-type: text/html TransUrethral Needle Ablation

TransUrethral Needle Ablation


The TUNA System delivers low-level radiofrequency energy directly into hyperplastic prostate tissue while preserving the urethra and adjacent structures from harm. Twin needles deliver the RF energy, heating a well-defined area of tissue to produce significant coagulative necrosis. Adjustable shields covering the needles are used to localize the lesions within the prostate and protect the urethra from thermal damage.

TUNA Catheter

TUNA 3 is a new generation TUNA System Catheter providing optimal viewing capabilities with a Fixed Focus Fiber Optic or a new Rod Lens System designed specifically for use with the TUNA 3 Catheter. The new TUNA Optics Rod Lens System features a zero degree lens with a 70 degree field of view. Multiple ports in the TUNA 3 Catheter shaft allow for the rapid and efficient evacuation of the bladder by aspiration or gravity drainage.

RF Generator The RF Generator is the control center for the TUNA 3 System, delivering the radiofrequency energy used to shrink hyperplastic tissue. Temperatures are reported for the urethra, prostate, and rectum, while impedance and output are continuously calculated as an indicator of effective energy delivery. The RF Generator has an RS-232 port which allows for the real-time data transfer of TUNA treatment parameters.

Even though intracellular temperature may exceed 90 degrees Centigrade at the needle tip, clinical experience shows minimal patient discomfort or sensation of heat. The steps of a TUNA procedure are straightforward and intuitive for any urologist. VidaMed provides a choice of cystoscopic viewing systems which allow the procedure to be performed under visual control.


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