Medical Design Briefs - July 2022 - 35

forces of day-to-day life while ensuring patient
comfort.
Most medical pressure sensitive adhesives
(PSAs) are made of either rubber,
acrylic, or silicone-based adhesives.
Each type is best suited to meet
different challenges, including length
of adhesion time, possible allergic reactions,
and patient comfort upon application/removal.
n
Adhesives Testing for Wearables
ISO 11608 is the internationally recognized
standard for testing needle-based
injection systems (NIS) for medical use.
In 2021, a new section of ISO 11608-6 focused
on on-body delivery systems was
released as a draft. While this new section
establishes standard practices for
testing many aspects of these novel drugdelivery
devices, it is still vague in how it
recommends testing the adhesives used
for these devices.
ISO 11608 points toward established
standards like ASTM D3330 for characterizing
the fundamental adhesive properties
of the material. However, it does not
provide recommendations for how to test
the more functional aspects such as the
torsional, shear, and peel forces encountered
by these devices in practice.
ASTM D3330 Methods A and F measure
the peel strength required to remove
pressure-sensitive adhesives from
a standard steel panel or from another
surface of interest at 90° or 180°, respectively.
The adhesive is carefully
applied to the test panel using a mechanical
roller of specified requirements.
The specimen is then peeled
away from the substrate at a set rate,
and the average adhesion force is recorded
over the course of the test.
The peel adhesion value is reported in
N/10 mm. This test mimics removing
an adhesive patch from a patient's skin
and can also serve as a baseline test to
compare back to after a specimen is
conditioned.
Instron's 6800 Series universal testing system
with a Torsion Add-On is used to apply both axial
and torsional loads to adhesives and other materials.
It is used to simulate loads that a wearable
device may experience while being worn by a patient.
(Credit: Instron)
Medical Design Briefs, July 2022
www.medicaldesignbriefs.com
35
http://info.hotims.com/82323-717 http://www.medicaldesignbriefs.com

Medical Design Briefs - July 2022

Table of Contents for the Digital Edition of Medical Design Briefs - July 2022

Medical Design Briefs - July 2022 - Cov1
Medical Design Briefs - July 2022 - Cov2
Medical Design Briefs - July 2022 - 1
Medical Design Briefs - July 2022 - 2
Medical Design Briefs - July 2022 - 3
Medical Design Briefs - July 2022 - 4
Medical Design Briefs - July 2022 - 5
Medical Design Briefs - July 2022 - 6
Medical Design Briefs - July 2022 - 7
Medical Design Briefs - July 2022 - 8
Medical Design Briefs - July 2022 - 9
Medical Design Briefs - July 2022 - 10
Medical Design Briefs - July 2022 - 11
Medical Design Briefs - July 2022 - 12
Medical Design Briefs - July 2022 - 13
Medical Design Briefs - July 2022 - 14
Medical Design Briefs - July 2022 - 15
Medical Design Briefs - July 2022 - 16
Medical Design Briefs - July 2022 - 17
Medical Design Briefs - July 2022 - 18
Medical Design Briefs - July 2022 - 19
Medical Design Briefs - July 2022 - 20
Medical Design Briefs - July 2022 - 21
Medical Design Briefs - July 2022 - 22
Medical Design Briefs - July 2022 - 23
Medical Design Briefs - July 2022 - 24
Medical Design Briefs - July 2022 - 25
Medical Design Briefs - July 2022 - 26
Medical Design Briefs - July 2022 - 27
Medical Design Briefs - July 2022 - 28
Medical Design Briefs - July 2022 - 29
Medical Design Briefs - July 2022 - 30
Medical Design Briefs - July 2022 - 31
Medical Design Briefs - July 2022 - 32
Medical Design Briefs - July 2022 - 33
Medical Design Briefs - July 2022 - 34
Medical Design Briefs - July 2022 - 35
Medical Design Briefs - July 2022 - 36
Medical Design Briefs - July 2022 - 37
Medical Design Briefs - July 2022 - 38
Medical Design Briefs - July 2022 - 39
Medical Design Briefs - July 2022 - 40
Medical Design Briefs - July 2022 - 41
Medical Design Briefs - July 2022 - 42
Medical Design Briefs - July 2022 - 43
Medical Design Briefs - July 2022 - 44
Medical Design Briefs - July 2022 - Cov3
Medical Design Briefs - July 2022 - Cov4
https://www.nxtbook.com/smg/techbriefs/24MDB06
https://www.nxtbook.com/smg/techbriefs/24MDB05
https://www.nxtbook.com/smg/techbriefs/24MDB04
https://www.nxtbook.com/smg/techbriefs/24MDB03
https://www.nxtbook.com/smg/techbriefs/24MDB02
https://www.nxtbook.com/smg/techbriefs/24MDB01
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
https://www.nxtbook.com/smg/techbriefs/techleaders22
https://www.nxtbook.com/smg/techbriefs/22MDB12
https://www.nxtbook.com/smg/techbriefs/22MDB11
https://www.nxtbook.com/smg/techbriefs/22MDB10
https://www.nxtbook.com/smg/techbriefs/22MDB09
https://www.nxtbook.com/smg/techbriefs/22MDB08
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
https://www.nxtbookmedia.com