REGULATORY TESTING OF MEDICAL
GRADE PLASTICS, RUBBERS & PACKAGING MATERIALS
1. Physical & Mechanical testing (As per BIS, EN, ISO &
ASTM standards)
It includes Tensile and hardness testing, Scratch
Resistance, Material fatigue testing, Static and fatigue
product testing, Grain size evaluation, Microstructure
analysis (phase analysis, etc.), Surface evaluations
(alpha case, anodization) and Corrosion testing.
Tensile testing per ASTM E8 is routinely performed to
evaluate cast, forged, and additively manufactured medical
devices such as hip stems and knee femurs, and to verify
mechanical properties of post-processed samples and
materials. Tensile properties of titanium and cobalt
chrome samples provide insight into how implants and
materials will perform in service and are related to other
mechanical properties such as fatigue and fracture
toughness.
Equipment required for Physical and Mechanical testing are
DSC (Differential Scanning Calorimetry), DMTA/DMA (Dynamic
Mechanical Analyzers), TMA Thermomechanical Analyzers),
TGA (Thermogravimetric Analyzer), HDT (Heat Desorption
Temperature) and Universal Testing Machine.
2. Chemical testing (As per BIS, EN, ISO, ASTM & 21 CFR
standards)
General chemical tests includes Molecular Weight (MW) of
Polymers, Structure & Chemistry of fractions, End groups &
Tacticity, Unreacted monomer and oligomers, Co-polymer
content and blend composition, Catalyst residues,
Contamination analysis, Chemical trace analysis and
Plastics and Polymers volatile organic compounds testing.
Medical devices components chemical testing includes
Identification of Extractable and Leachable chemicals,
Forced Degradation Studies and Degradation Product
Characterization, Stability studies including Accelerated
and Stressed, Chemical and bio-analytical Characterization
of Proteins, Peptides and Macromolecule Therapeutics,
Specialist Surface Analysis and Surface Imaging,
Integrated Study Management, Pre-clinical and Stage 1,
Bio-analytical and Immunochemistry investigations,
Pharmacopoeia Testing for Quality Control, Medical Device
Polymer Materials Testing, DEHP and BPA Testing for Health
Canada Medical Device Licensing, RoHS Testing Services.
3. Microbiological testing (As per BIS, EN, ISO, USP &
ASTM standards)
Microbiological testing of a medical device refers to
tests for the presence and risk of microbial contaminants.
Methods may include mainly the testing of bio burden
levels (Bio burden is a quantitative testing in which we
only detect number of colony forming units (cfu)),
Presence of endotoxin (Bacterial Endotoxin test, also
known as Limulus Amebocyte Lysate (LAL, which assesses
medical devices coming in contact with cerebrospinal fluid
or the cardiovascular system), and methods for sterility
assurance.
Microbiological testing also includes Biofilm test, Anti
microbial test, Sterility testing (Sterility testing of
medical devices are typically performed using media called
SCDM (Soybean -Casein Digest Medium), which is physically
placed in the media for fourteen days of Incubation time)
& Microbial Barrier test. Sterility assurance of medical
devices is one of the requirements set forth by global
medical device regulations. Ensuring consistent
microbiological testing during manufacturing is imperative
to product quality and patient safety. All injectable and
implantable devices need to be tested for endotoxin prior
to being inserted into the patient. While the process of
preparing a medical device for endotoxin testing and the
endotoxin limit may vary from device to device.
4. Biological Safety testing for raw materials (As per
IP/BP/EP/JP/USP standards)
Raw materials of Medical devices includes PVC beads, HEPE
beads, silicon, nylon, paper, Rubber beads, rubber
closures, resin, coating material etc.
For raw material of medical device, biological safety
study can be done by various compendial method given by
IP/BP/EP/JP/USP.
There tests includes - In-vitro cytotoxicity test
- Intracutaneous reactivity test
- Acute systemic toxicity test
- Implantation test
Over and above, some regulatory agency also asked for
Material mediated Pyrogen Test (Using Rabbit) & abnormal
toxicity test.
5. Biocompatibility testing of Raw Material /
Components of Medical device (As per ISO 10993-1:2018
standards)
Risk & Toxicological assessment helps to understand the
biological safety profile of the medical device product.
Biological Safety testing is an assessment for biological
effects from the exposure of a medical device or material
to human body can include testing such as cytotoxicity,
sensitization, irritation or intracutaneous reactivity,
systemic toxicity, subchronic toxicity, genotoxicity,
implantation and haemocompatibility, etc.
As per ISO 10993-1:2018, New MDR (for CE), USFDA and CDSCO,
below mentioned testing required:
• Cytotoxicity testing (ISO 10993-5:2009)
• Sensitization testing (ISO 10993-10:2021)
• Intracutaneous test / Irritation testing (ISO
10993-23:2021)
• Acute systemic toxicity (ISO 10993-11:2017)
• Material mediated Pyrogen test (ISO 10993-11:2017)
Additionally in case of prolonged / long term exposure of
component / device with the body, below mentioned
additional testing are also required:
• Chemical Characterization Test (ISO 10993-18:2020)
• Extractable & Leachable Test (ISO 10993-18:2020 & ISO
10993-17:2002)
• Implantation test (ISO 10993-6:2016)
• Sub-acute / sub-chronic/ chronic toxicity test (ISO
10993-11:2017)
• Genotoxicity test (ISO 10993-3:2014)
• Hemocompatability testing (ISO 10993-4:2017)
• Degradation & Toxicokinetic (ISO 10993 -16:2014)
• Carcinogenicity test (ISO 10993-11:2017)
• Reproductive toxicity test (ISO 10993-11:2017)
• Biological Risk Assessment (ISO 10993-1:2018)
Raw materials of Medical devices includes PVC tubes,
Silicon Tubes, Nonwoven fabrics, HME filter, Packaging
materials etc.
6. Packaging testing of Raw Material / Components of
Medical device (As per BIS, ISO & ASTM standards)
All sterile medical devices require validation of their
packaging. The sterile barrier must be shown to be
effective throughout the product's claimed shelf-life.
According to ISO 11607-1, the specific
properties of medical devices and their packaging systems
must remain stable during their shelf life. Afterward,
products can be subjected to various test systems in order
to evaluate the performance of the packaging system,
aseptic presentation and microbial barrier properties, as
well as the performance of the containing medical device,
functionality and biocompatibility. Validation of the
packaging processes, such as the forming and sealing
process of sterile barrier systems, pursuant to ISO
11607-2. In the course of a combined stability and
packaging validation study, sterilized and final-packed
test devices are subjected to both thermal and regular
aging and to transport simulation, pursuant to ISTA or
ASTM standards.
Packaging testing of raw material includes
Dye test for Seal strength & integrity, Peel test, Burst
test, Bubble test, Air permeability test and test for
microbiological tightness, Qualification of packaging
materials, Validation of the forming, sealing and assembly
processes of packaging for terminally sterilized medical
devices, Validation of final packaging systems for sterile
medical devices, Evaluation of the shelf life of the
sterile packed medical device, Stressed medical devices
are subjected to specific performance tests as well as to
a biological evaluation test strategy. |