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Ice burn: protecting the flank during renal cryotherapy
Jennifer L Young1, Petros Sountoulides, Surendra B Kolla
1Department of Urology, University of California Irvine, Orange, California 92868, USA. jlyoung@uci.edu
Journal of Endourology
|January 23, 2010
Summary
Using a 14-gauge angiocatheter as an insulating sheath during renal cryotherapy may reduce flank temperature. This technique shows potential for protecting against cryoprobe insertion site pain and paresthesia.
Area of Science:
- Urology
- Minimally Invasive Surgery
- Cryotherapy
Background:
- Cryoablation is a minimally invasive treatment for small renal masses.
- Postoperative pain and paresthesia at the cryoprobe insertion site are common complaints.
Purpose of the Study:
- To investigate the efficacy of a 14-gauge angiocatheter as an insulating sheath during renal cryotherapy.
- To assess the potential of this technique to mitigate flank discomfort.
Main Methods:
- Laparoscopy-guided percutaneous cryoablation was performed on six Yorkshire swine.
- Cryoneedles were placed directly or through a 14-gauge angiocatheter sheath.
- Flank temperatures were monitored at two depths using a Multi-Point Thermal Sensor.
Main Results:
- Sheath use resulted in higher mean temperatures at both inner and outer flank sensors compared to direct cryoneedle placement.
- The mean temperature increase ranged from 3.0 to 9.4 degrees C with sheath use.
- A trend toward statistical significance was observed for sheath insulation (p=0.07-0.08).
Conclusions:
- A 14-gauge angiocatheter may offer insulation during renal cryotherapy.
- This technique could potentially protect against "ice burn" and associated side effects.
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