Cardiovascular and interventional radiology
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Cardiovasc Intervent Radiol · Nov 2009
Comparative StudyRadiofrequency ablation zones in ex vivo bovine and in vivo porcine livers: comparison of the use of internally cooled electrodes and internally cooled wet electrodes.
This experimental study was undertaken to compare radiofrequency (RF) ablation zones created by internally cooled (IC) and internally cooled wet (ICW) electrodes. IC and ICW electrodes with a 2-cm exposed active tip were used to induce 30 ablation zones in 10 explanted bovine livers with a 12-min ablation time, respectively. In addition, two kinds of electrodes produced 16 ablation zones in five living porcine livers, respectively. ⋯ In living porcine livers using IC and ICW electrodes, the corresponding values were 2.62 cm, 2.00 cm, 5.76 cm3, 15%, 3.84 cm, 2.89 cm, 18.50 cm3, and 25%, respectively. In both ex vivo and in vivo livers, long-axis diameters, short-axis diameters, volumes, and variable coefficients for the use of ICW electrodes were significantly greater than for the use of IC electrodes (each p<0.05). ICW electrodes produced significantly larger ablation zones than IC electrodes in both ex vivo and in vivo livers, but the ablation zones induced by IC electrodes were more reproducible.
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Cardiovasc Intervent Radiol · Nov 2009
Case ReportsTreatment of bilateral hand frostbite using transcatheter arterial thrombolysis after papaverine infusion.
Standard therapy for frostbite has been unaltered for more than 20 years. Recently there have been reports of improved outcomes with the addition of a vasodilator to intra-arterial thrombolytic therapy. ⋯ Intra-arterial catheters were placed in the brachial arteries and a papaverine infusion was initiated, followed by intra-arterial tPA thrombolysis. Follow-up examination at 4 months revealed full hand function and complete resolution of symptoms.
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Cardiovasc Intervent Radiol · Nov 2009
Embolization of renal angiomyolipomas: short-term and long-term outcomes, complications, and tumor shrinkage.
This study retrospectively evaluated outcomes, complications, and tumor shrinkage in renal angiomyolipomas after transcatheter arterial embolization (TAE). All renal angiomyolipoma patients who underwent TAE between August 2000 and December 2008 and had short-term (
6 months) follow-up images were evaluated. Complications and tumor relapse after TAE were reviewed. ⋯ Results stratified by the completeness of embolization indicate that only the short-term size reduction rate differed significantly (p=0.025), while the long-term reduction rate and short- and long-term follow-up tumor size and size reduction were comparable between the two groups. In conclusion, selective TAE is effective for tumor shrinkage in most renal angiomyolipomas, with acceptable complication and relapse rates. Tumor shrinkage occurring within 6 months after TAE may reflect the long-term effect of TAE.