Medical Design Briefs - April 2023 - 10

Technical Design
Considerations for
Selecting the Optimal
Coaxial Cable for Use in
Today's RF/Microwave
Ablation Applications
P
10
atient safety, cost, and efficiency
will always be the top
drivers shaping the evolution
of healthcare. As technology
advances, more medical and
surgical procedures can be completed in
noninvasive ways, reducing costs, risks,
and recovery time.
These improvements include minimally
invasive procedures that provide treatment
options such as radiofrequency and
microwave ablation. Radio frequency ablation
uses electrical energy, and microwave
ablation uses micro wave energy to
ablate tissue using heat generated from
alternating currents. These devices fall
under the collective category of electrosurgical
ablation. Ongoing advances in
energy de livery have continually made
this type of ablation system safer and
more efficient.
Electrosurgical ablation systems operate
in the ISM (industrial, scientific,
medical) in the radiofrequency range
of 915 MHz, 2.45 GHz, and 5.80 GHz
at power levels of 50 W (+47 dBm) or
more. This enables them to achieve
thermal effects within biological tissue,
heating precise areas with an optimal
axial ratio to destroy abnormal
cells, avoiding invasive surgical procedures
and long recovery times. One of
the most significant uses of electrosurgical
ablation is on unresectable
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liver, lung, and kidney tumors. This
technique is also used to shrink other
growths in the body and treat various
conditions, including chronic venous
insufficiency in the legs and chronic
back and neck pain.
The Role of Coaxial Cables in
Ablation
Electrosurgical ablation devices consist
of a generator and a handpiece with one
or more electrodes. The generators produce
a variety of electrical waveforms,
and as these waveforms change, so do the
corresponding tissue effects. The systems
use tiny antennas or probes projected
onto a patient's body to focus electroMedical
Design Briefs, April 2023
(Credit: JPC-PROD/Adobe Stock)

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Medical Design Briefs - April 2023

Table of Contents for the Digital Edition of Medical Design Briefs - April 2023

Medical Design Briefs - April 2023 - Cov1A
Medical Design Briefs - April 2023 - Cov1B
Medical Design Briefs - April 2023 - Cov1
Medical Design Briefs - April 2023 - Cov2
Medical Design Briefs - April 2023 - 1
Medical Design Briefs - April 2023 - 2
Medical Design Briefs - April 2023 - 3
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Medical Design Briefs - April 2023 - Cov3
Medical Design Briefs - April 2023 - Cov4
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