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The Benefits of Microwave
Ablation
Presented by: Symple Surgical
The goal of this session is to:
 Introduce the concept of Microwave Ablation
 Basic Physics of Microwave and other Radio
Frequency Energy Sources
 Review some of the therapies & fields Microwave Ablation
is being used in
 Many of which have FDA approval
 Compare the capabilities Microwave Ablation to more
widely accepted RF Ablation
The Benefits of Microwave
Ablation
What is Microwave Ablation?
 Microwave Energy is a subset of the Radio Frequency Spectrum, similar to RF Ablation
Energy
 Transmitted via insulated coaxial cable
 Delivered through an antenna/emitter
 Common Medical Microwave: ƒ = 915 MHz, 2.45 GHz
 For reference: RF: ƒ = 460 kHz
 Creates an electromagnetic-field for dielectric heating
 RF Ablation requires conduction of alternating electrical current
What is Microwave
Ablation?
Dielectric Heating occurs when the molecules, as part of human tissue, become polarized by
an alternating electromagnetic field. Rapid rotational movement, referred to as molecular
dipole rotation, of the molecules inside the material cause collisions with neighboring
molecules. The ensuing result is frictional heat.
The heating zone is controlled by several factors including: Power, Frequency, Antenna
Design, and the material properties in the near-field of the antenna.
Common Applications for
Microwave Ablation
Microwave Ablation is a relatively new therapy used primarily in the
field of Oncology. Current Microwave Ablation therapies include:
 Soft Tissue Ablation
 Amenorrhea
 Bone Metastases
 Heart Arrhythmias
 Cosmetic Treatments
 Tumor Ablation
 Renal
 Adrenal
 Liver
 Lung
 Kidney
 Prostate
Microwave Ablation Companies
 BSD Medical
 NeuWave Medical
 MedWaves
 Microsulis Medical
(AngioDynamics)
 ValleyLab Covidien
“Due to its high success rate in treatment of most cancers, the
microwave ablation market is estimated to rise very quickly by 2020.”
- Markets and Markets Research Report, Ablation Devices Market to 2016
 Miramar Labs
 Vision Medical
 ProstaLund
 Urologix
 Symple Surgical Inc.
Currently, there are only a few companies with developed products in
the field of Microwave Ablation:
Advantages of Microwave
Ablation
Microwave Ablation has several advantages for treatment compared to more
common ablation therapies including:
 Faster Heating1
 Larger Heating Zone2
 More Uniform Heating Zone3
 Less dependent on Tissue Properties3
 No grounding pad or 2nd pole necessary
 Tissue contact is not necessary
 Independent of wall pressure
Microwave Ablation vs. RF
Ablation
 Faster Heating
Figure 1: Temperature measurement taken in vivo Swine Kidney, 5mm
from applicator. 1
Microwave Ablation vs. RF
Ablation
 Larger Heating Zone
Figure 2: Typical RF (left, 1 cm diameter) and Microwave (right, 2.1 cm
diameter) ablations created at a power of about 40 W for 10 min in ex
vivo porcine lung. 2
Microwave Ablation vs. RF
Ablation
 More Uniform Heating
Microwave Ablation: New Technology has distinct
Advantages
Citations
1. Brace CL. Radiofrequency and microwave ablation of the liver, lung, kidney and bone: what are the
differences. Curr Probl Diagn Radiol. 2009 May-Jun; 38(3): 135-143.
2. Andreano A, Huang Y, Meloni Mf, Lee F, Brace C. Microwaves create larger ablations than radiofrequency when
controlled for power in ex vivo tissue. Medical Physics. 2010 Jun; 37(6): 2967-2973.
3. Laeseke P, Sampson L, Frey T, van der Weide D, Lee F, Brace C. Thermal ablation in kidneys: microwave
ablation with a triaxial antenna results in larger zones of coagulation than rf. Radiological Society of North
America Annual Meeting; Chicago, IL. 2006
4. Lubner M, Brace C, Hinshaw JL, Lee F. Microwave Tumor Ablation: Mechanism of Action, Clinical Results and
Devices. Journal of Vascular Interventional Radiology. 2010 Aug; 21(8 Suppl): S192-S203.

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The Benefits of Microwave Ablation

  • 1. The Benefits of Microwave Ablation Presented by: Symple Surgical
  • 2. The goal of this session is to:  Introduce the concept of Microwave Ablation  Basic Physics of Microwave and other Radio Frequency Energy Sources  Review some of the therapies & fields Microwave Ablation is being used in  Many of which have FDA approval  Compare the capabilities Microwave Ablation to more widely accepted RF Ablation The Benefits of Microwave Ablation
  • 3. What is Microwave Ablation?  Microwave Energy is a subset of the Radio Frequency Spectrum, similar to RF Ablation Energy  Transmitted via insulated coaxial cable  Delivered through an antenna/emitter  Common Medical Microwave: ƒ = 915 MHz, 2.45 GHz  For reference: RF: ƒ = 460 kHz  Creates an electromagnetic-field for dielectric heating  RF Ablation requires conduction of alternating electrical current
  • 4. What is Microwave Ablation? Dielectric Heating occurs when the molecules, as part of human tissue, become polarized by an alternating electromagnetic field. Rapid rotational movement, referred to as molecular dipole rotation, of the molecules inside the material cause collisions with neighboring molecules. The ensuing result is frictional heat. The heating zone is controlled by several factors including: Power, Frequency, Antenna Design, and the material properties in the near-field of the antenna.
  • 5. Common Applications for Microwave Ablation Microwave Ablation is a relatively new therapy used primarily in the field of Oncology. Current Microwave Ablation therapies include:  Soft Tissue Ablation  Amenorrhea  Bone Metastases  Heart Arrhythmias  Cosmetic Treatments  Tumor Ablation  Renal  Adrenal  Liver  Lung  Kidney  Prostate
  • 6. Microwave Ablation Companies  BSD Medical  NeuWave Medical  MedWaves  Microsulis Medical (AngioDynamics)  ValleyLab Covidien “Due to its high success rate in treatment of most cancers, the microwave ablation market is estimated to rise very quickly by 2020.” - Markets and Markets Research Report, Ablation Devices Market to 2016  Miramar Labs  Vision Medical  ProstaLund  Urologix  Symple Surgical Inc. Currently, there are only a few companies with developed products in the field of Microwave Ablation:
  • 7. Advantages of Microwave Ablation Microwave Ablation has several advantages for treatment compared to more common ablation therapies including:  Faster Heating1  Larger Heating Zone2  More Uniform Heating Zone3  Less dependent on Tissue Properties3  No grounding pad or 2nd pole necessary  Tissue contact is not necessary  Independent of wall pressure
  • 8. Microwave Ablation vs. RF Ablation  Faster Heating Figure 1: Temperature measurement taken in vivo Swine Kidney, 5mm from applicator. 1
  • 9. Microwave Ablation vs. RF Ablation  Larger Heating Zone Figure 2: Typical RF (left, 1 cm diameter) and Microwave (right, 2.1 cm diameter) ablations created at a power of about 40 W for 10 min in ex vivo porcine lung. 2
  • 10. Microwave Ablation vs. RF Ablation  More Uniform Heating
  • 11. Microwave Ablation: New Technology has distinct Advantages
  • 12. Citations 1. Brace CL. Radiofrequency and microwave ablation of the liver, lung, kidney and bone: what are the differences. Curr Probl Diagn Radiol. 2009 May-Jun; 38(3): 135-143. 2. Andreano A, Huang Y, Meloni Mf, Lee F, Brace C. Microwaves create larger ablations than radiofrequency when controlled for power in ex vivo tissue. Medical Physics. 2010 Jun; 37(6): 2967-2973. 3. Laeseke P, Sampson L, Frey T, van der Weide D, Lee F, Brace C. Thermal ablation in kidneys: microwave ablation with a triaxial antenna results in larger zones of coagulation than rf. Radiological Society of North America Annual Meeting; Chicago, IL. 2006 4. Lubner M, Brace C, Hinshaw JL, Lee F. Microwave Tumor Ablation: Mechanism of Action, Clinical Results and Devices. Journal of Vascular Interventional Radiology. 2010 Aug; 21(8 Suppl): S192-S203.