Translate | ISO 10993-18:2020 Medical Device Chemical Characterization, Extractables, Leachables and Exposure Evidence

Translating ISO 10993-18:2020 medical-device chemical characterization reports is not a matter of replacing scientific terms with plausible English. Manufacturers, material suppliers, laboratories, toxicologists and regulators need the translated record to retain exactly which device was studied, which chemical species were identified, how the analytical results were obtained and which claims remain uncertain. This guide explains how to translate extractables and leachables reports, laboratory tables and exposure-related evidence for an international technical handover without turning observations into unsupported safety conclusions.

The published scope of ISO 10993-18:2020 concerns chemical characterization of medical-device materials within a risk-management process. It distinguishes information about materials of construction and their chemical constituents from substances introduced during manufacturing, laboratory extractables and substances actually released under clinical-use conditions. ISO confirms the 2020 edition was reviewed and retained in 2025 and lists Amendment 1:2022 on uncertainty factors. A translator should identify the edition, amendment status and applicable company procedure before touching a single result field. This article is original educational guidance, not the copyrighted text of the standard or a substitute for expert biological evaluation.

Quick answer: keep device identity, specimen preparation, extraction medium, analytical technique, chemical identifier, measured value, reporting threshold, uncertainty, exposure context and conclusion status in separate fields. Translate the evidence as recorded; do not promote a detected constituent into proven patient exposure, and do not call a low result a declaration of safety. The examples below are invented teaching records rather than test data. They show reviewers how to preserve meaning when converting clinical-materials evidence into English or translating it from English into another language.

A six-step route for the reader

Obtain the controlled source record, device configuration and revision.
Identify whether the passage describes material composition, processing substances, extractables, leachables or risk interpretation.
Lock chemical names, CAS identifiers where supplied, units, limits and analytical qualifiers.
Translate verbs of evidence separately: detected, identified, quantified, estimated, calculated, reviewed and concluded.
Reconstruct every table, footnote and cross-reference without inventing missing data.
Request separate scientific and linguistic approval before release to another party.

Read the report as a chain of evidence

A chemical characterization report normally connects an identifiable device or material to a method, a result, an interpretation and a later decision. The links are not interchangeable. A resin supplier declaration may describe a material family, while a finished-device extract describes a sample after manufacturing and processing. Translators who begin with an isolated sentence lose this relationship. Before drafting, create an evidence map showing specimen or lot, intended contact context, laboratory method, analytes, detection qualifiers and the document that interprets the results. If one link is absent, mark it absent instead of silently filling the gap.

Establish the real object under test

A device name might refer to a commercial product family, a particular size, a subassembly, an individual component or an aged sample. These differences matter because the material in contact with the patient may vary. Preserve product codes, manufacturing lot, sample orientation, dimensions and whether the subject is raw stock or a finished device. Do not collapse two configurations into one noun merely because the target language offers an attractive generic term. In a bilingual table, use one stable identifier and a separate explanation, so reviewers can match the translation to drawings and certificates.

Separate constituents from released substances

An ingredient listed in material composition is not automatically measured in a laboratory extract. Likewise, a substance identified during an exaggerated laboratory extraction is not automatically a measured clinical leachable. This distinction is the heart of the subject. Use vocabulary that tells the reader whether a statement concerns material make-up, an extraction experiment, a simulated-use finding or a clinical-use observation. A translation that erases this boundary changes the scientific claim even if every chemical name is spelled correctly.

Keep extraction conditions attached to results

Extraction time, solvent, temperature, ratio, agitation and sample surface area can change what a report establishes. The translator does not need to choose these conditions, but must transmit them correctly. Preserve nominal and actual values, the relationship between liquid volume and specimen, and whether the condition is described as exhaustive, exaggerated, simulated or otherwise qualified by the source. A value placed in the wrong column can make the result appear to describe a different exposure. When the original has an unexplained abbreviation, flag it rather than expand it on intuition.

Preserve the limits of analytical identification

A laboratory may report a named compound, a tentative identification, a chemical class or an unknown peak. Those are different degrees of identification. An analytical library match does not justify silently calling a tentative result confirmed. Translate the exact qualifier and retain the original identifier when spelling or transliteration may vary between languages. The interpretive reader needs to know which finding was supported by a reference standard, which relied on spectral matching, and which remains unresolved. Keep method descriptions distinct from evidence of accuracy or suitability.

Translate detection and quantification with care

Detection limit, quantification limit, reporting threshold and analytical evaluation threshold have different purposes. They are not interchangeable phrases for a small amount. A result below a detection limit is not the same as a quantified zero, and a result below a reporting threshold is not proof of absence. Preserve inequality signs, not-detected flags, basis of calculation and whether values are mass per device, mass per extraction volume or normalized concentration. The units and denominator are part of the finding; the number alone is not meaningful.

Distinguish uncertainty from error

An uncertainty statement does not mean a laboratory admits that the result is incorrect. It characterizes limitations in measurement or estimation. Where the original cites ISO 10993-18:2020/Amd 1:2022, preserve that specific amendment reference rather than treating it as a new edition. Make uncertainty factors, assumptions and coverage descriptions visible to the reviewer. Translating an estimate as an exact amount, or turning an interval into a single rounded number, can distort subsequent decisions. When the source is imprecise, the translation should preserve—not secretly cure—that imprecision.

Keep toxicological review separate from chemical analysis

Chemical characterization can provide input into biological evaluation, but an analytical result is not by itself a toxicological conclusion. Separate phrases such as potential exposure, estimated intake, toxicological screening and acceptable risk. Do not replace the toxicologist’s qualified interpretation with the translator’s judgment. If a table reports substances while a later memo discusses a decision, cite both documents and keep their authorship clear. A translator may improve legibility, but cannot assume responsibility for risk classification or evidence sufficiency.

Handle manufacturing residues without inventing causes

A constituent may relate to a material, processing aid, cleaning material, manufacturing contaminant or sterilization process. Unless the record establishes its origin, do not translate a suspected source as a proven cause. Even small grammatical choices—such as ‘from’ instead of ‘possibly associated with’—can change a hypothesis into an assertion. Preserve the stage of manufacture, sampling point and scope of investigation. When material identification and residue analysis are on separate sheets, the translated narrative should not imply that one sheet proves what the other only proposes.

Treat degradation and ageing as separate questions

A material may change because of ageing, storage, processing or intended use. But a study about a degradation product is not automatically an ageing-validation study. Preserve the stated time points, accelerated conditions, baseline sample and analytical comparison. The report should say what was tested, not what an editor believes the test demonstrates. Do not transfer conclusions from a newly manufactured specimen to aged production units unless the source explicitly supports that inference. This is especially important when several revisions of a formulation appear in the same file.

Translate tables before writing prose summaries

Scientific tables have nested headings, footnotes and qualifiers that may be lost when converted to a paragraph. Rebuild column structure first and check every cell against the controlled source. Preserve decimal separators, significant digits and scientific notation; verify that a ‘less than’ result remains an inequality. Some laboratories use abbreviations that are meaningful only with a legend. Carry the legend with the data. Only after the table has passed a bilingual cell-by-cell check should an explanatory summary be drafted.

Protect document status and chain of review

A preliminary laboratory result, amended report, final signed certificate and draft risk assessment can contain similar wording but different authority. Translate the status exactly. ‘Reviewed’ is not automatically ‘approved’; ‘released for discussion’ is not ‘released for manufacture’. Track source revision and translator version separately, so a later correction can be located. If a new chemical name is introduced by a reviewer, document whether it corrects a source error or only adjusts target-language usage. The provenance is as important as the revised spelling.

Adapt to different reading audiences without changing evidence

A procurement officer may need a concise statement about documentation; a chemist needs extraction and method details; a clinical reviewer needs exposure context. These are different presentations of the same record, not permission to rewrite the science. Publish a plain-language explanation beside the formal translation if necessary, clearly labelled as commentary. Use definitions after the evidence rather than swapping technical words for everyday approximations inside the signed record. The ideal result is accessible without being less exact.

Design a practical bilingual review workflow

First perform document-control review for identity and completeness. Next perform terminology and table review by a person comfortable with the source and target languages. Then request a domain expert to examine all expressions affecting exposure, patient contact, chemical identification or risk. A final reviewer checks version consistency and the reproduction of footnotes. Every question should have an owner, source location and outcome: accepted, corrected, or unresolved. A good workflow does not treat an unresolved uncertainty as a stylistic preference.

Recognize what this guide cannot certify

This article teaches how to read and translate technical communication. It cannot demonstrate conformity to ISO 10993-18, supply missing analytical evidence or replace the interpretation of a qualified chemist, toxicologist or regulatory professional. Access the actual published standard and relevant project procedures when contractual or regulatory work requires them. ISO standard citations should be precise, but a citation is not itself evidence that a device was evaluated, passed a requirement, or is suitable for a patient group. The limits of the translation are part of responsible communication.

Twenty-eight original translation cases with the problem and a safer reading

Case 1: Material family versus exact grade

Situation. A supplier file names a broad polymer family, but the tested component has a detailed grade and batch identifier. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Do not upgrade the general family statement into proof that every listed grade shares identical constituents. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Retain the exact grade and batch in the translated table; describe the family only as context and ask whether the evidence applies to the specific component. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 2: Finished device versus raw material

Situation. The analysis used injection-moulded finished hubs rather than resin pellets. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. A loose rendering that says only ‘polymer sample’ hides processing and contact-surface differences. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Say explicitly that the tested articles were finished hubs; ask the reviewer which manufacturing stage the translated claim covers. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 3: Surface area normalization

Situation. The laboratory reports recovered mass normalized by sample surface area. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Changing the unit to mass per device without a documented conversion creates a different measurement. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Copy the source denominator exactly, preserve any area estimate and provide conversion only as a separately identified calculation. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 4: Two solvents, two purposes

Situation. A protocol uses one aqueous medium and one organic medium to investigate different substance groups. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Calling both media ‘washing solution’ obscures why separate extraction results appear. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Translate medium names separately, keep their associated sample IDs and note that solvent choice affects interpretability. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 5: Reported extraction temperature

Situation. A report records a specified extraction temperature and a different actual monitored range. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Replacing both with a single temperature erases a process deviation. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Preserve planned and observed values in separate columns and refer the discrepancy to the laboratory reviewer. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 6: Tentative spectral match

Situation. An unknown peak receives a tentative library identification with a match qualifier. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. The word ‘identified’ alone may sound like confirmation by a reference standard. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Translate as ‘tentatively identified’ when the source uses that qualification and retain the analytical note describing the method. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 7: Unknown analyte peak

Situation. A chromatography table includes an unresolved peak labelled U-07. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Inventing a common chemical name would transform missing knowledge into false certainty. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Retain U-07 unchanged and describe it as an unidentified feature until the laboratory supplies a controlled identification. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 8: Below reporting threshold

Situation. A result is recorded as below an established reporting threshold. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Substituting ‘absent’ or numeric zero erases detection and reporting limitations. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Keep the inequality, the threshold name and units; make clear that the statement refers to reporting under the stated method. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 9: Not detected versus not tested

Situation. One sample has a nondetect entry while another assay was not performed. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Both can look like empty cells when a spreadsheet is exported. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Use different labels for ‘not detected’ and ‘not tested’; verify blank fields before drawing a conclusion from missing data. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 10: Replicates and pooling

Situation. The laboratory measures three replicates but reports one pooled interpretation. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Calling the pooled value a replicate result misstates its provenance. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Translate the sampling design and note which entries are individual measurements and which are summaries. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 11: Mass per device

Situation. A table reports micrograms recovered per device, not micrograms per millilitre. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. A unit swap changes the magnitude of exposure described. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Lock the numerator and denominator next to the value; verify the translated unit with the source table and test report. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 12: Material additive and residue

Situation. A named substance is intentionally present in formulation while another may derive from processing. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. The expression ‘contamination’ may wrongly describe a declared additive. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Preserve whether the source identifies an intentional constituent, a potential residue or an unknown-origin finding. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 13: Sterilization-related finding

Situation. The method detects a substance possibly associated with the sterilization process. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Rendering association as causation incorrectly attributes the finding. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Keep ‘possibly associated’ or the original hedge; ask manufacturing and analytical owners before naming a confirmed origin. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 14: Aged sample and baseline

Situation. Data compare aged specimens against an initial time-point sample. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. A translation saying the product was ‘stable’ may ignore individual increases. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Report the exact comparison; reserve any stability conclusion for the authorized assessment. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 15: Extractables and leachables

Situation. A study labels results as laboratory extractables rather than release under actual clinical use. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Calling these ‘patient leachables’ implies demonstrated real-world exposure. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Keep the experiment category visible in headings and narrative; ask whether a separate simulated-use study exists. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 16: Concentration without extraction ratio

Situation. A report gives mg/L but the translated abstract summarizes total mass. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. The volume relationship is necessary for a valid total-mass estimate. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Keep mg/L and state that a mass estimate requires the recorded extraction volume and calculation assumptions. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 17: Scientific notation

Situation. An instrument output contains a value written in exponent notation with a qualifier. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Locale formatting can move decimal points or erase exponent signs. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Check converted typography against the numerical original and preserve the same precision and inequality meaning. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 18: CAS number versus trade name

Situation. A chemical appears under a commercial product name and an analytical identifier. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Treating the trade name as a single chemical identity can be misleading. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Retain each identifier in its proper field and verify whether the trade name covers a mixture. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 19: Exposure estimate

Situation. A toxicological note estimates exposure using several assumptions. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. The words ‘patient was exposed’ convert a model into an observed fact. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Write ‘estimated potential exposure’ if that is what the source establishes, and retain the assumptions for the reviewer. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 20: Report revision

Situation. A revised laboratory report supersedes a previous analyte table. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Combining old and new values without version marks produces a false record. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Bind the translation to one controlled report revision and flag every amended figure in the change log. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 21: Supplier declaration

Situation. A supplier says that a particular constituent is not intentionally added. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. This is not equivalent to analytical confirmation that the constituent is absent. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Translate ‘not intentionally added’ verbatim and preserve that it is a supplier declaration rather than a test result. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 22: Analytical method capability

Situation. A method is suitable for a named class of analytes under stated conditions. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Generalizing suitability to all chemicals exceeds the source evidence. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Keep scope qualifiers and method limitations with the statement; request scientific validation of any broader summary. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 23: Correction of a source typo

Situation. A compound name is misspelled in the signed source record. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Silently correcting it breaks traceability between the certified document and translation. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Record the observed source wording and request formal clarification; explain any agreed correction in a translator note. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 24: Uncertainty factor

Situation. An appendix discusses an uncertainty factor with a cited amendment. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. A translation that invents a numerical factor makes the report appear complete when it is not. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Preserve the actual cited amendment and leave the factor unspecified when the source provides no value. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 25: Acceptance statement

Situation. A summary says results were considered in a biological evaluation. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. It does not automatically conclude that every chemical risk is acceptable. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Translate the procedural statement as such and link the final conclusion only to the properly authorized assessment. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 26: Device-contact category

Situation. The device description differentiates indirect from direct contact. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. A broad phrase such as ‘contacts patient’ loses the defined context. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Keep the category and duration description intact and have the device-risk owner review the translation. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 27: Multiple language glossary

Situation. English and Spanish files disagree about the term for a tentative compound. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. A glossary can falsely standardize a meaning that varies by evidential status. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Define separate terms for definitive and tentative identification; add an example and record who approved them. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

Case 28: Client-facing conclusion

Situation. A commercial summary calls a device ‘chemically safe’ although only characterization work was supplied. The text may appear in a report body, laboratory spreadsheet, client query or revision note. Before translating the sentence, identify the author, document date, specimen reference and what the stated observation is meant to support.

Translation trap. Such wording converts source evidence into a claim not established by the document. This is a meaning error rather than an ordinary stylistic disagreement: a reader in another language could infer a different material, quantity, test status or level of certainty.

Better decision. Provide a limited summary of tests performed, identify the missing authorized evaluation and decline the unsupported headline. Place the answer in the terminology log, record the supporting source passage and ask a qualified reviewer to sign off if the wording influences exposure or safety interpretation. The explanation should stay beside the evidence, never masquerade as measured data.

A controlled glossary that explains relationships

Constituent: A substance forming part of a material; its presence in the formulation does not alone establish release during use.
Extractable: A substance released by a material or device under stated laboratory extraction conditions; the conditions belong with the term.
Leachable: A substance that migrates under conditions of clinical use; do not substitute this term for every laboratory extract.
Tentative identification: A provisional identification with a stated evidential basis, not the same as confirmation.
Not detected: A method-specific analytical result; not a metaphysical claim of zero substance.
Not tested: The assay or measurement was not performed, and therefore no result exists.
Quantification: Measurement of an amount under specified conditions, with units and method limitations.
Reporting threshold: A stated boundary for reporting results; it must not be confused with a patient safety limit.
Exposure estimate: A model-based or calculated quantity dependent on explicit assumptions.
Biological evaluation: A wider risk-related assessment into which chemical characterization may feed; it is not the analytical test alone.
Revision: A controlled version of a record, often decisive when tables or conclusions change.
Traceability: The ability to relate a translated assertion to its source, evidence and approval.

Questions readers ask before approving a translation

Can I say ‘non-toxic’ when no concerning analytes were reported?

No. Translate the recorded analytical findings and their limitations. A broader biological or toxicological conclusion requires its own evidence and authorized review.

Is an extractable the same thing as a leachable?

No. Laboratory extraction and release under clinical-use conditions describe different evidence contexts. Keep those contexts visible.

Should chemical identifiers be translated?

Preserve controlled identifiers and chemical structures. Translate explanatory labels if necessary, but do not change CAS numbers or compound identity from memory.

What if the source uses an unclear abbreviation?

Mark the abbreviation as unresolved, ask the laboratory for its definition and record the decision. Guessing can distort a result.

Can I round numbers for a general audience?

Not inside the formal evidence table unless the source or controlled procedure directs it. Any simplified value belongs in a clearly labelled explanation.

What is the difference between below limit and zero?

Below a stated method limit means the report cannot establish a quantified value at that level. It does not establish absence.

Does ISO 10993-18 itself certify a device?

No. A standard provides requirements and methods; a citation or translation is not a product certificate.

Should the translator select an analytical method?

No. The translator communicates what was performed and may raise questions. Method selection belongs to qualified technical owners.

How should amendment references appear?

Carry the exact year and part citation. The 2022 amendment to the 2020 edition is not a new 2022 edition of the underlying standard.

What is the final acceptance test?

Ask a source-language reviewer and technical expert whether the translated reader would reach the same limited, evidence-supported interpretation as the original.

A practical final review, from first sentence to archive

Start with the first three paragraphs: do they tell the reader what document was translated, which device configuration is relevant, and where uncertainty remains? Then inspect every table separately. Compare sample ID, chemical name, qualifiers, row ordering, units, methods, amendments and signatures against the controlled source. Translate annotations and captions as carefully as body paragraphs. Require a reviewer to classify every discrepancy as an identity, scientific, numerical, procedural or presentation issue so serious problems are not lost among style suggestions.

After correction, preserve a bilingual issue log and a final version map. The delivered file should state which source revision it represents, which unresolved questions remain, what was approved by the linguistic reviewer, and what required specialist judgment. Remember that clear language is not permission to invent certainty. The most useful translation is the one a reader can trust precisely because it shows the boundary between what was measured, what was estimated and what has not yet been established.