Medical Design Briefs - April 2023 - 11

The PhaseTrack®47 is a semi-rigid phase-stable coax assembly featuring a proprietary fluorocarbon dielectric,
TF4®, eliminating the PTFE change phase occurring around 19 °C. (Credit: Times Microwave)
magnetic (EM) energy on the treated tissues.
The EM energy is coupled to the
antenna or probe by a small-diameter,
low-loss coaxial cable assembly.
There are several important coaxial
cable assemblies for ablation systems, including
the lead cable connecting the
generator to the handpiece and the
micro- coaxial cable within the handpiece.
This application uniquely requires
cables that balance optimal power
delivery with thermal properties and
limitations. As a result, coaxial cable assemblies
for RF and microwave ablation
are very specialized.
Since power handling becomes an issue
when the cable size is limited, as it is
Medical Design Briefs, April 2023
in ablation, trade-offs are made to balance
power efficiency, heat dissipation,
flexibility, and ergonomics. Therefore,
cable and connector designs must be
customized to address specific application
needs. Furthermore, choosing optimal
coaxial cable assemblies to achieve
ideal performance is crucial because life
may depend on it.
Additionally, the ultimate conundrum
with coaxial cable designs is that the
smaller the device is, the higher the thermal
density within power circuits. Often,
designing the optimal assembly requires
very specific cables for high power, with
maneuverability to perform in environments
with repeated movement; kinkwww.medicaldesignbriefs.com
resistant
designs to help with repeated
flexure and easy maneuvering in tight
and compact places; and sufficient isolation
to prevent interference. Key considerations
in choosing a high-performance
coaxial cable solution therefore include:
* Low loss.
* Power handling and thermal management.
*
Reliability and safety.
* Shielding effectiveness.
* Ease of use and integration.
Low Loss. Cable loss or attenuation is
a function of its dielectric and conductive
materials, length, diameter, and operating
frequency. What makes a cable
more flexible or lower loss is how those
11

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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
Medical Design Briefs - April 2023 - 4
Medical Design Briefs - April 2023 - 5
Medical Design Briefs - April 2023 - 6
Medical Design Briefs - April 2023 - 7
Medical Design Briefs - April 2023 - 8
Medical Design Briefs - April 2023 - 9
Medical Design Briefs - April 2023 - 10
Medical Design Briefs - April 2023 - 11
Medical Design Briefs - April 2023 - 12
Medical Design Briefs - April 2023 - 13
Medical Design Briefs - April 2023 - 14
Medical Design Briefs - April 2023 - 15
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Medical Design Briefs - April 2023 - 18
Medical Design Briefs - April 2023 - 19
Medical Design Briefs - April 2023 - 20
Medical Design Briefs - April 2023 - 21
Medical Design Briefs - April 2023 - 22
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Medical Design Briefs - April 2023 - 26
Medical Design Briefs - April 2023 - 27
Medical Design Briefs - April 2023 - 28
Medical Design Briefs - April 2023 - 29
Medical Design Briefs - April 2023 - 30
Medical Design Briefs - April 2023 - 31
Medical Design Briefs - April 2023 - 32
Medical Design Briefs - April 2023 - 33
Medical Design Briefs - April 2023 - 34
Medical Design Briefs - April 2023 - Cov3
Medical Design Briefs - April 2023 - Cov4
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https://www.nxtbook.com/smg/techbriefs/24MDB10
https://www.nxtbook.com/smg/techbriefs/24MDB09
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https://www.nxtbook.com/smg/techbriefs/23MDB12
https://www.nxtbook.com/smg/techbriefs/23MDB11
https://www.nxtbook.com/smg/techbriefs/23MDB10
https://www.nxtbook.com/smg/techbriefs/23MDB09
https://www.nxtbook.com/smg/techbriefs/23MDB08
https://www.nxtbook.com/smg/techbriefs/23MDB07
https://www.nxtbook.com/smg/techbriefs/23MDB06
https://www.nxtbook.com/smg/techbriefs/23MDB05
https://www.nxtbook.com/smg/techbriefs/23MDB04
https://www.nxtbook.com/smg/techbriefs/23MDB03
https://www.nxtbook.com/smg/techbriefs/23MDB02
https://www.nxtbook.com/smg/techbriefs/23MDB01
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https://www.nxtbook.com/smg/techbriefs/22MDB11
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https://www.nxtbook.com/smg/techbriefs/22MDB09
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https://www.nxtbook.com/smg/techbriefs/22MDB07
https://www.nxtbook.com/smg/techbriefs/22MDB06
https://www.nxtbook.com/smg/techbriefs/22MDB04
https://www.nxtbook.com/smg/techbriefs/techleaders21
https://www.nxtbook.com/smg/techbriefs/22MDB03
https://www.nxtbook.com/smg/techbriefs/22MDB02
https://www.nxtbook.com/smg/techbriefs/22MDB01
https://www.nxtbook.com/smg/techbriefs/21MDB12
https://www.nxtbook.com/smg/techbriefs/21MDB11
https://www.nxtbook.com/smg/techbriefs/21MDB10
https://www.nxtbook.com/smg/techbriefs/21MDB09
https://www.nxtbook.com/smg/techbriefs/21MDB08
https://www.nxtbook.com/smg/techbriefs/21MDB07
https://www.nxtbook.com/smg/techbriefs/21MDB06
https://www.nxtbook.com/smg/techbriefs/21MDB05
https://www.nxtbook.com/smg/techbriefs/21MDB04
https://www.nxtbook.com/smg/techbriefs/21MDB02
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