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19th International Conference on
Obesity, Healthcare - Nutrition & Fitness
March 18 - 19, 2019 | New York, USA
Anet structure
bariatric surgery device
with silicone materials
Teng Zhang
Columbia University, USA
Introduction: Silicone rubber
has excellent biocompatibility
and good mechanical
properties, which makes it
a valuable candidate for the
implantable medical device.
Bariatric surgery is considered
the most effective treatment
option for morbid obesity. This
paper tests the feasibility of
designing a net-shaped device
to control stomach capacity.
Methods: The net-shaped
bariatric device is custom
made for each patient by
3D printing using silicone
based on a physician’s
assessment of height, weight,
and energy consumption of
obese patients. The device
is placed on the outer wall
of the patient’s stomach by
laparoscopic surgery. Due to its
good elasticity and toughness
of the silicone rubber, a
patient’s stomach is getting
constrained gradually by the
device during the feeding
process, until the constrain
reaches a threshold to achieve
the purpose of weight control.
The function of the net-
shaped device was tested by
simulation experiments using
a balloon as the model for the
stomach. The pressure pump
inflates to simulate feeding
process. Our experiment
uses a control group with
balloons only and a testing
group with a basket over the
balloons. For both groups, the
balloon was injected with air
at a constant pressure stream.
When the pressure reached
a certain level, the volume of
the balloon w/o the device
was recorded. The relationship
between the volume and
pressure for different hardness,
thickness and braid density of
the device was measured.
Results: In the control group,
the balloon tripled in size when
the pressure pump stopped
filling; while the volume of the
balloon in the control group
increased by 0.5 times. The
hardness, thickness, and braid
density have a lot effect on
the expanding volume, and
the silicone with 25D (shore
hardness), 0.2mm in thickness
and 35 PPI seems to be optimal
in performance.
Discussion: A net-shaped
bariatric surgical device made
of silicone were designed and
prepared. The preliminary
function of the device was
tested using a simulation
system, and the design
parameters of the device were
optimized.
SCIENTIFIC TRACKS | DAY 2 JOURNAL OF OBESITY &WEIGHT LOSS THERAPY 2019, VOLUME: 4 | DOI: 10.4172/2165-7904-C2-093