Medical Design Briefs - July 2021 - 36

Advancements in Robotic Magnetic Navigation Technology
Enhance Surgical Processes
Robots are revolutionizing the field of medicine. From
critical procedures to routine tasks, physicians and hospitals
are adopting the use of this advanced technology to
reduce costs, enhance precision, and increase safety. The
use of Robotic Magnetic Navigation (RMN) in electrophysiology
was introduced a decade ago and continues to
evolve. One surgical robot company, St. Louis-based
Stereotaxis, recently received FDA approval for its
Genesis RMN system. Stereotaxis is a global leader in
innovative robotic technologies designed to
enhance the treatment of arrhythmias and perform
endovascular procedures. The Genesis is the first
system to treat cardiac arrhythmias.
The innovative Genesis system offers the proven benefits
of RMN in a design that is faster, smaller, lighter,
and more flexible. The system consists of two robotically
controlled magnets positioned on flexible and
rugged robotic arms that are located next to the operating table.
During the procedure, a physician uses a computer interface to
adjust the magnetic field around the patient, directing and steering
the magnetic catheter inside of the patient with extreme precision.
The system's small size improves the patient experience
while on the operating table and provides medical personnel
with greater access to the patient during the procedure.
Committed to optimizing overall operating performance of
the machine and providing an enhanced experience for the
patient, Stereotaxis initiated an assessment of the Genesis.
THK, a linear motion component supplier to Stereotaxis, analyzed
and identified linear motion components that could be
replaced by dropping in the THK component and eliminating
any need for a redesign of the Genesis.
THK experienced sales and design engineers collaborated
to make determinations and validate their findings. A roller
bearing inside the robotic arms of the machine was replaced
with a THK Type RB cross roller ring. Data indicated that the
Type RB offers increased accuracy, the ability to bear heavier
loads, and improved rigidity. This upgrade resulted in a more
robust design with a greatly enhanced life expectancy compared
to the original bearing. The Type RB features inner ring
rotation. The outer ring is separable while the inner ring is
integrated with main body.
On the linear axis of the machine, THK suggested replacing
the current component with the THK Type SHS25 linear
motion guide. The Type SHS utilizes patented THK Caged Ball
technology that eliminates friction between balls, achieves low
The Stereotaxis Genesis robotic
magnetic navigation system.
noise, offers long-term maintenance-free operation, and provides
a high-speed response. The Type SHS also features fourway
equal load. The Type SHS LM block can receive a wellbalanced
preload, increasing the rigidity in the four directions
(radial, reverse-radial, and lateral directions) while maintaining
a constant, low friction coefficient. With the low sectional
height and the high rigidity design of the LM block, the Type
SHS achieves highly accurate and stable linear motion.
A third component, the THK Type BNT precision ground
ball screw was recommended as a replacement. The Type BNT
is a high-efficiency feed screw with the ball making a rolling
motion between the screw axis and the nut. Compared with a
conventional sliding screw, this product has drive-torque of
one-third or less, resulting in drive motor power savings.
Mounting screw holes are drilled on the square ball screw nut
of the Type BNT, allowing it to be compactly mounted on a
machine without a housing.
Having successfully incorporated THK into other designs,
Stereotaxis was confident that these components would not
only bring longer life and higher accuracy to its design, but
most importantly, they would help to provide a superior experience
for patients being treated in hospitals and clinics with
Stereotaxis Genesis technology. A key advantage to using THK
components in the Genesis was that THK was able to provide
improved solutions using components that fit into the existing
design, rather than requiring Stereotaxis to go back to the
drawing board and spend valuable resources on an already
proven design.
To learn more about
THK Type SHS LM guide with patented
Caged Ball technology achieves highly
accurate and stable linear motion.
36
Intro
Cov
THK Type RB cross roller ring offers
increased accuracy, the ability to bear
heavier loads, and improved rigidity.
THK Type BNT precision ground ball
screw
provides
savings.
www.medicaldesignbriefs.com
ToC
+
-
A
drive
motor power
Stereotaxis, visit www.
stereotaxis.com. For
more information about
THK America, Inc.,
Schaumburg, IL, visit
http://info.hotims.com/
79415-345 or call (847)
310-1111.
Medical Design Briefs, July 2021
µ
È
http://www.stereotaxis.com http://info.hotims.com/79415-345 http://www.medicaldesignbriefs.com

Medical Design Briefs - July 2021

Table of Contents for the Digital Edition of Medical Design Briefs - July 2021

Medical Design Briefs - July 2021 - Intro
Medical Design Briefs - July 2021 - Cov4
Medical Design Briefs - July 2021 - Cov1
Medical Design Briefs - July 2021 - Cov2
Medical Design Briefs - July 2021 - 1
Medical Design Briefs - July 2021 - 2
Medical Design Briefs - July 2021 - 3
Medical Design Briefs - July 2021 - 4
Medical Design Briefs - July 2021 - 5
Medical Design Briefs - July 2021 - 6
Medical Design Briefs - July 2021 - 7
Medical Design Briefs - July 2021 - 8
Medical Design Briefs - July 2021 - 9
Medical Design Briefs - July 2021 - 10
Medical Design Briefs - July 2021 - 11
Medical Design Briefs - July 2021 - 12
Medical Design Briefs - July 2021 - 13
Medical Design Briefs - July 2021 - 14
Medical Design Briefs - July 2021 - 15
Medical Design Briefs - July 2021 - 16
Medical Design Briefs - July 2021 - 17
Medical Design Briefs - July 2021 - 18
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Medical Design Briefs - July 2021 - 20
Medical Design Briefs - July 2021 - 21
Medical Design Briefs - July 2021 - 22
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Medical Design Briefs - July 2021 - 24
Medical Design Briefs - July 2021 - 25
Medical Design Briefs - July 2021 - 26
Medical Design Briefs - July 2021 - 27
Medical Design Briefs - July 2021 - 28
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Medical Design Briefs - July 2021 - 31
Medical Design Briefs - July 2021 - 32
Medical Design Briefs - July 2021 - 33
Medical Design Briefs - July 2021 - 34
Medical Design Briefs - July 2021 - 35
Medical Design Briefs - July 2021 - 36
Medical Design Briefs - July 2021 - 37
Medical Design Briefs - July 2021 - 38
Medical Design Briefs - July 2021 - 39
Medical Design Briefs - July 2021 - 40
Medical Design Briefs - July 2021 - Cov3
Medical Design Briefs - July 2021 - Cov4a
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