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Urology – Kidney

Cryoablation of Renal Tumor

Cryoprobes (2mm) are inserted into the site targeted for ablation to freeze the cancer. CO2 or N20 gas is delivered under pressure into a small chamber inside the tip of the needle where it expands and cools, reaching a temperature inside the cryoprobes well below -78O /-89O Celsius thus producing an iceball of predictable size and shape around the needle.  As a result, the iceball engulfs the tumor, killing the cancerous cells as well as a small margin of surrounding tissue while sparing healthy kidney structures.

ultrasound approach (e.g. rectum cancer )

Cryoablation Approaches

Minimally invasive surgery.

Renal cancer can be targeted by a couple of different approaches of cryoablation. A physician can customize treatment to accommodate the patient’s general health as well as the size and location of the tumor. Rather than an open surgical approach, a minimally invasive approach is usually preferred.

CT approach

Cryoablation – Percutaneous Approach (CT, USG)

The minimally invasive approach most frequently chosen by the physicians is percutaneous ablation. With percutaneous access, no incisions are made. Patient is positioned in a computerized tomography. Under the guidance of CT, or ultrasound cryoablation needles and thermal sensors are inserted through the skin and positioned in the tumor. The whole procedure is monitored using CT or MRI. Usually conscious sedation, local anesthesia, or general anesthesia are used to perform image-guided percutaneous cryoablation.

Laparoscopic approach

Laparoscopic Approach

In a laparoscopic-guided kidney cryoablation only 3-4 small incisions through which instruments are inserted are made. A laparoscopic ultrasound probe is inserted through one of these incisions to send images to a screen so the physician can visualize the kidney, appropriately position the cryoablation needles, observe the iceball formation and ensure tumor destruction. This kind of procedure is almost always performed under general anesthesia.

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