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Sterilization TD QC Check
Review the sterilization section of the MDR technical file. Mark each check OK, Issue or N/A. Issues are collected into a report that is emailed to the QC reviewer, consultant and team lead.
1. Project
2. Checklist
0/0 reviewed · 0 issuesSelect the sterilization method above to show only the relevant method section.
Common NB findings: check these first
0/9- N1
Product family / worst-case rationale present and covers all variants
- N2
Validation done on the current device and packaging revision, or change assessment provided
- N3
EO residuals tested at the correct contact category and at more than one time point
- N4
Pyrogenicity covers material-mediated pyrogens, not endotoxin only
- N5
Real-time aging study running alongside accelerated aging, with plan to confirm
- N6
Current standard editions used, or gap assessment for superseded editions
- N7
Sterilizer's ISO 13485 certificate valid and quality agreement in place
- N8
Latest requalification / dose audit provided
- N9
Label shelf life does not exceed validated shelf life
A. Regulatory basis and TD structure
0/10- A1
Sterilization section exists as a clearly indexed part of the TD, not scattered across V&V
- A2
TD describes the method used, including validation reports for packaging, sterilization and maintenance of sterility
- A3
Validation report addresses bioburden, pyrogen and (if applicable) sterilant residues
- A4
Description of environmental conditions for relevant manufacturing steps is included
- A5
GSPR checklist rows 11.4, 11.5, 11.6, 11.7 and 23.3 marked applicable, with standard and document reference per row
- A6
GSPR 11.4: packaging maintains device characteristics and sterility during transport and storage
- A7
GSPR 11.5/11.6: designed, manufactured, packaged and sterilized by validated methods; sterility maintained until opening
- A8
List of applied standards with full edition (year + amendments); harmonised status checked; deviations from harmonised editions justified
- A9
Document numbers, revisions and dates in TD match the attached reports
- A10
Reports are signed/approved and in English (or a language accepted by the NB)
B. Product definition, families and method rationale
0/7- B1
All models/sizes/variants in scope of the certificate are covered by the sterilization validation
- B2
Product family / grouping rationale documented; worst-case (master) product identified with justification (size, mass, density, lumens, mated surfaces, bioburden)
- B3
Product adoption into an existing validated cycle/dose assessed (new or changed devices)
- B4
Rationale for choice of sterilization method; material compatibility demonstrated
- B5
Required SAL stated (10⁻⁶ for 'STERILE' claim); any other SAL justified by risk
- B6
Device performance and safety verified after sterilization (incl. worst-case: max dose / double cycle / re-sterilization if allowed)
- B7
Re-sterilization by manufacturer (rework) allowed? Number of cycles validated and reflected in procedures
C. Manufacturing environment and contamination control
0/6- C1
Cleanroom / controlled-environment classification for assembly and primary packaging stated and justified
- C2
Environmental monitoring programme: particulates, viable air/surface, alert/action limits, frequency, trending
- C3
Personnel gowning, hygiene and training controls in place
- C4
Process water / compressed air / cleaning agents controlled where they contact product
- C5
Cleaning validation for devices with machining, oils, residues (esp. implants)
- C6
Supplier-sterilized or supplier-cleaned components controlled
D. Ethylene oxide (EO) validation
0/13- D1
Validation protocol approved before execution; acceptance criteria predefined
- D2
Installation and operational qualification (IQ/OQ) of sterilizer and aeration equipment
- D3
Approach stated (overkill half-cycle, BI/bioburden, or bioburden-based) and justified
- D4
Microbiological PQ: typically 3 half-cycles (or fractional cycles) + full cycle; BI/PCD placement at worst-case locations
- D5
PCD shown to be equal or more resistant than product (internal vs external PCD comparison)
- D6
Physical PQ: temperature/humidity distribution, EO concentration, pressure profiles, load configuration and density defined
- D7
BI certificates: B. atrophaeus, population, D-value, lot traceable
- D8
Sterility tests of product exposed to fractional/half cycles performed with method validation (bacteriostasis/fungistasis)
- D9
EO and ECH residuals tested on worst-case product, at correct exposure category (limited / prolonged / permanent contact)
- D10
For implants (permanent contact): average daily dose and cumulative limits met; aeration time validated
- D11
Residual limits also assessed for neonates / special populations if in intended use
- D12
Process specification (cycle parameters with tolerances) issued and matches validated cycle
- D13
Parametric release (if claimed) justified and validated
E. Radiation (gamma / e-beam / X-ray) validation
0/8- E1
Maximum acceptable dose established; product and packaging functional after max dose (incl. aged samples)
- E2
Sterilization dose established by recognised method: Method 1, Method 2, VDmax²⁵ / VDmax¹⁵ (ISO 11137-2) or VDmax^SD (ISO/TS 13004), or 25 kGy substantiation
- E3
Bioburden on 3 batches (10 samples/batch typical) with validated recovery efficiency used in dose setting
- E4
Verification dose experiment: SIP justified, positives within acceptance
- E5
Dose mapping (OQ/PQ) for the defined loading pattern; Dmin/Dmax locations and ratio to routine monitoring position
- E6
Dosimetry system calibrated, traceable to national standard; uncertainty considered
- E7
Change of irradiator / source / e-beam ↔ gamma transfer assessed (re-mapping)
- E8
Quarterly (or justified frequency) dose audits defined; latest audit results and any augmentation
F. Moist heat, other methods and user-processed devices
0/7- F1
Moist heat: cycle (temp/time/pressure), air removal, load, heat penetration and distribution studies; BI challenge (G. stearothermophilus)
- F2
VH₂O₂: lumen/material claims, load limits, residual H₂O₂ addressed
- F3
Dry heat, LTSF or novel method: validated under ISO 14937 or method-specific standard; sterilant characterisation and residuals
- F4
Aseptic processing (if terminal sterilization not possible) justified and media fills performed
- F5
Devices supplied non-sterile and sterilized by user: at least one validated method in IFU (cleaning, disinfection, drying, sterilization parameters)
- F6
Reusable devices: number of reprocessing cycles validated and any limit stated in IFU
- F7
Non-sterile devices needing user sterilization: packaging minimises contamination risk
G. Bioburden, sterility and pyrogen testing
0/9- G1
Bioburden method validated: recovery efficiency (repetitive or spiked), correction factor applied
- G2
Routine bioburden monitoring frequency, alert/action limits and trend data
- G3
Bioburden characterised (aerobes, fungi; spore-formers where relevant to method)
- G4
Sterility test method suitability (bacteriostasis/fungistasis) done for each product family
- G5
Bacterial endotoxin test (LAL/rFC) validated: inhibition/enhancement, extraction method
- G6
Endotoxin limit justified: commonly 20 EU/device; 2.15 EU/device for CSF/intrathecal contact
- G7
Material-mediated pyrogenicity addressed (rabbit test or justification)
- G8
Endotoxin routine testing frequency defined (batch or justified sampling plan)
- G9
Test labs accredited (ISO/IEC 17025) or qualified under supplier controls
H. Sterile barrier system, packaging and shelf life
0/12- H1
Sterile barrier system (SBS) and protective packaging fully described: materials, configuration, suppliers
- H2
SBS material compatible with sterilization method (porosity for EO/steam; radiation stability)
- H3
Microbial barrier properties of porous materials demonstrated
- H4
Sealing process validated (IQ/OQ/PQ): temp, pressure, dwell; seal strength and integrity at process limits
- H5
Package integrity tests: seal strength (ASTM F88), dye penetration (F1929) or bubble (F2096), visual (F1886)
- H6
Transport / distribution simulation on worst-case configuration after sterilization
- H7
Accelerated aging: Q10, temperature, humidity justified; AAF calculation correct
- H8
Real-time aging study initiated in parallel; status and plan to confirm the claimed shelf life
- H9
Device (not only packaging) stability over shelf life verified: material degradation, functional performance
- H10
Aged samples were sterilized at worst-case (max dose / multiple cycles) before aging
- H11
Aseptic presentation / usability of opening evaluated
- H12
Shelf life claim on label = shelf life validated (no extrapolation beyond data)
I. Routine control, release, revalidation and contract sterilizer
0/8- I1
Routine monitoring and product release criteria defined (BI/PCD results, parameters, dosimeter readings, residuals)
- I2
Sample batch record / certificate of processing provided
- I3
Requalification / revalidation frequency defined (e.g., EO annual review; radiation dose audits) and latest requalification attached
- I4
Change control triggers for re-validation: product, packaging, load, equipment, site, supplier
- I5
Contract sterilizer identified (name, address); ISO 13485 certificate valid and covering sterilization
- I6
Quality / technical agreement with sterilizer defines responsibilities (validation, release, deviations, notification of changes)
- I7
Sterilizer listed as critical supplier and subject to NB unannounced audit provisions
- I8
Non-conforming cycle handling and deviations procedure in place; history of deviations reviewed
J. Labelling and IFU
0/8- J1
Label indicates sterile state and sterilization method (ISO 15223-1 symbol, e.g. STERILE EO / STERILE R)
- J2
Sterile packaging bears: sterile identification, declaration of sterile condition, method, manufacturer, device description, manufacturing date, use-by date
- J3
Instruction to check IFU for what to do if sterile packaging is damaged or unintentionally opened before use
- J4
'Do not use if package is damaged' symbol and single-use / do-not-resterilize symbols where applicable
- J5
Use-by date matches validated shelf life (H12)
- J6
IFU storage and handling conditions match those used in shelf-life and transport studies
- J7
Single-use devices: IFU states known risks of reuse/resterilization
- J8
Reusable devices: validated reprocessing instructions and cycle limit in IFU (link to F5/F6)
K. Links to risk management, biocompatibility, clinical and PMS
0/6- K1
Risk file covers sterility-related hazards: non-sterility, pyrogens, residuals, packaging breach, shelf-life expiry, material degradation
- K2
Biological evaluation performed on final, sterilized (and aged where relevant) device
- K3
Sterilant residuals and endotoxin conclusions referenced in the BER
- K4
CER / literature on infection-related complications considered; sterility claims consistent with clinical data
- K5
PMS plan / PSUR trend non-sterility complaints, infections, packaging failures
- K6
PMCF addresses long-term implant infection where relevant
L. Implantable / Class III specifics, common NB findings and sign-off
0/5- L1
Permanent-contact EO residual limits applied (not limited/prolonged)
- L2
Endotoxin tested per batch or on justified sampling plan for implants
- L3
Absorbable / polymer implants: radiation or EO effect on degradation profile and mechanical properties verified over shelf life
- L4
Implant cleanliness (particulates, residual processing aids) demonstrated before sterilization
- L5
Implant card / patient information does not contradict sterile-state information
M. General document quality
0/5- M1
Overall quality of editing (language, formatting, consistency, no leftover template text)
- M2
Manufacturer name and address are captured correctly throughout
- M3
Procedures / protocols are correctly identified and numbered
- M4
Records are correctly captured, identified and numbered
- M5
Latest and prevailing harmonised and non-harmonised standards used throughout
3. QC report
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