1 / 18

Microwave Ablation of Hepatic Tumors: Simultaneous Use of Multiple Probes

This study investigates the use of multiple microwave probes for the treatment of hepatic tumors, aiming to increase lesion size, customization, and treatment efficiency. Results show larger lesions are achieved with multiple probes, offering improved treatment options for complex tumors and those near blood vessels.

dpatti
Download Presentation

Microwave Ablation of Hepatic Tumors: Simultaneous Use of Multiple Probes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Microwave Ablation of Hepatic Tumors: Simultaneous Use of Multiple Probes Results in Large Areas of Tissue Necrosis Andrew Wright MD, Chris Johnson, Fred Lee Jr. MD, and David Mahvi MD Departments of Radiology and Surgery University of Wisconsin Hospital

  2. Multiple Probe Ablation • Microwave Ablation • Goals • Increase lesion size • Increase control and customization of lesion size and shape • Decrease treatment time • Allow for treatment of multiple tumors

  3. Hypothesis • Multiple probe hepatic ablation will result in synergistically larger lesion sizes by shielding lesion center from blood-flow mediated cooling

  4. Methods • Microwave Ablation System • Vivant Medical • 13g, 15cm dipole antenna • 60W, 915MHz generator • 8 channels • Fiberoptic temperature monitor

  5. Methods • Microwave Protocol • Domestic Swine • 10 minute ablation, 40 Watts • Single Probe Ablation • Multiple Probe Ablation • 3 parallel probes in triangular array • Separation between probes varied from 0.5 to 3.5cm

  6. Methods • Microwave Protocol Single Probe Multiple Probe

  7. Assessment • Lesion dimensions calculated • Multiple Probe lesions scored for shape

  8. Results

  9. Results

  10. Results

  11. Results • Size by Separation

  12. Results • Lesion Shape

  13. Results • Lesion Shape

  14. Results • Temperature

  15. Results

  16. Results • 5 Probes

  17. Conclusions • Microwave ablation may be performed with multiple, simultaneous probes • Microwave ablation with three probes results in lesions four times larger than single probe microwave ablation • Confluent lesions may be produced with probe separations of 1.6cm or less

  18. Summary • Microwave ablation has several theoretical advantages over RF ablation • Multiple probe microwave ablation may allow for treatment of larger, more complex tumors as well as simultaneous treatment of multiple tumors • Multiple probe ablation may improve treatment of tumors near blood vessels

More Related