Iodine131HippuranQualityChecker
Iodine-131 Hippuran
Utility description: Iodine-131 Hippuran
Iodine131 Hippuran Quality Checker — radiopharmaceutical QC utility.
The source description did not contain a separate English section. The utility uses deterministic rule-based checks for Iodine-131 Hippuran using input.csv fields and generates output.json for QA/QC review.
Input format:
BatchNumber,RadiochemicalPurityPercent,FreeIodine131Percent,BenzoicAcidImpurityPercent,SpecificActivityMBqPerMg,pH,EndotoxinsEU,SterilityTest,TotalActivityMBq,AppearanceScore
Key source description in Russian:
Iodine-131 Hippuran Quality Checker — Йод-131 Гиппуран (Ортоиодгиппурат натрия)
ℹ️ Утилита проверяет критические параметры радиофармпрепарата для оценки функции почек:
• Радиохимическая чистота (≥95%)
• Примесь свободного Йода-131 (≤3%)
• Примесь бензойной кислоты (≤2%) — продукт гидролиза!
• Удельная активность, рН (6.0–8.0), эндотоксины, стерильность
⚠️ КРИТИЧНО: Гиппуран используется для измерения эффективного почечного плазмотока (ЭПФ).
Примеси свободного йода и бензойной кислоты имеют ДРУГОЙ механизм распределения!
Свободный йод → щитовидная железа/желудок (ложный фон).
Бензойная кислота → печень (артефакты, занижение почечного клиренса).
Даже 5% примесей делают расчет ЭПФ НЕКОРРЕКТНЫМ!
Использование:
Iodine131HippuranQualityChecker.exe → демо-режим (вывод в консоль)
Iodine131HippuranQualityChecker.exe input.csv output.json → оценка ваших данных
Формат input.csv:
BatchNumber,RadiochemicalPurityPercent,FreeIodine131Percent,BenzoicAcidImpurityPercent,SpecificActivityMBqPerMg,pH,EndotoxinsEU,SterilityTest,TotalActivityMBq,AppearanceScore
Пример (стерильность: 0=стерильно, 1=контаминация, внешний вид: 0=норма):
I131-HIP-2026-001,97.5,1.5,1.0,35.0,7.0,45.0,0,185.0,0
— ЗАЧЕМ ЭТО НУЖНО?
Ортоиодгиппурат натрия I-131 — классический радиофармпрепарат для динамической нефросцинтиграфии.
• Имитирует парааминогиппуровую кислоту (ПАГ) — «золотой стандарт» измерения почечного кровотока.
• Активно секретируется проксимальными канальцами почек (транспортёр OAT1).
• Используется для оценки эффективного почечного плазмотока (ЭПФ), диагностики обструкции, оценки трансплантата.
⚠️ КРИТИЧЕСКИ ВАЖНО:
• Радиохимическая чистота ≥95% — гарантия корректности количественных расчетов.
• Свободный Йод-131 ≤3% — йодид не секретируется канальцами, создает внепочечный фон.
• Бензойная кислота ≤2% — продукт гидролиза амидной связи гиппурана. Захватывается печенью, искажает кривые активности.
• рН 6.0–8.0 — стабильность препарата и безопасность введения.
• Сinput.csv
BatchNumber,RadiochemicalPurityPercent,FreeIodine131Percent,BenzoicAcidImpurityPercent,SpecificActivityMBqPerMg,pH,EndotoxinsEU,SterilityTest,TotalActivityMBq,AppearanceScore I131-HIP-2026-001,97.5,1.5,1.0,35.0,7.0,45.0,0,185.0,0 I131-HIP-2026-002,93.0,4.0,3.0,28.0,7.2,50.0,0,180.0,0
URS & FS — User Requirements and Functional Specification
This document describes the controlled interface and behaviour of Iodine131HippuranQualityChecker for Iodine-131 Hippuran.
Domain limits and critical parameters
- BatchNumber,RadiochemicalPurityPercent,FreeIodine131Percent,BenzoicAcidImpurityPercent,SpecificActivityMBqPerMg,pH,EndotoxinsEU,SterilityTest,TotalActivityMBq,AppearanceScore
- ℹ️ Утилита проверяет критические параметры радиофармпрепарата для оценки функции почек:
- • Радиохимическая чистота (≥95%)
- • Примесь свободного Йода-131 (≤3%)
- • Примесь бензойной кислоты (≤2%) — продукт гидролиза!
- ⚠️ КРИТИЧНО: Гиппуран используется для измерения эффективного почечного плазмотока (ЭПФ).
- Примеси свободного йода и бензойной кислоты имеют ДРУГОЙ механизм распределения!
- Свободный йод → щитовидная железа/желудок (ложный фон).
- ⚠️ КРИТИЧЕСКИ ВАЖНО:
- • Радиохимическая чистота ≥95% — гарантия корректности количественных расчетов.
- • Свободный Йод-131 ≤3% — йодид не секретируется канальцами, создает внепочечный фон.
- • Бензойная кислота ≤2% — продукт гидролиза амидной связи гиппурана. Захватывается печенью, искажает кривые активности.
URS — User Requirements Specification
| ID | Requirement | Criticality | Acceptance criterion |
|---|---|---|---|
| URS-001 | The utility shall accept an input.csv file with the exact headers defined in the data contract. | High | The file is processed without manual header editing. |
| URS-002 | The utility shall perform deterministic QC evaluation for Iodine-131 Hippuran using input values, approved limits and domain rules. | High | Each input row receives a PASS / WARNING / FAIL status. |
| URS-003 | The utility shall validate mandatory fields, data types, numeric ranges, units and pharmaceutical/radiochemical plausibility. | High | Schema and conversion errors are explicitly reported. |
| URS-004 | The utility shall identify critical deviations related to radionuclidic purity, radiochemical purity, free radionuclide, impurities, pH, endotoxins and sterility when such fields are present. | High | A critical deviation causes FAIL or a separate critical finding. |
| URS-005 | The utility shall generate output.json with machine-readable results, source values, warnings and failures. | High | JSON is suitable for LIMS/ELN/MES integration and QA/QC review. |
| URS-006 | The utility shall not use machine learning to decide conformance. | Medium | The result is based on explicit rules, thresholds and input values. |
| URS-007 | The utility shall preserve traceability between batch number, input values, applied rules and final status. | High | The output contains the batch identifier and the list of checked parameters. |
| URS-008 | The documentation shall support IQ/OQ preparation and inspection discussion with FDA/EMA/Roszdravnadzor or local regulators. | Medium | URS & FS, input.csv/output.json contract and test scenarios are supplied with the utility. |
input.csv contract
| # | Field | Type | Sample | Purpose |
|---|---|---|---|---|
| 1 | BatchNumber | string | I131-HIP-2026-001 | Batch or lot identifier used for traceability. |
| 2 | RadiochemicalPurityPercent | string | 97.5 | Radiochemical purity; confirms the labelled chemical form and binding quality. |
| 3 | FreeIodine131Percent | decimal | 1.5 | Free radionuclide / unbound species; important for non-target uptake and toxicity. |
| 4 | BenzoicAcidImpurityPercent | string | 1.0 | Controlled impurity or residual material. |
| 5 | SpecificActivityMBqPerMg | decimal | 35.0 | Radioactivity value used for release, decay or dose-related assessment. |
| 6 | pH | decimal | 7.0 | Solution pH; relevant for stability, compatibility and administration. |
| 7 | EndotoxinsEU | decimal | 45.0 | Bacterial endotoxins; critical for parenteral administration. |
| 8 | SterilityTest | flag / boolean | 0 | Sterility result; critical release parameter. |
| 9 | TotalActivityMBq | decimal | 185.0 | Radioactivity value used for release, decay or dose-related assessment. |
| 10 | AppearanceScore | string | 0 | Visual appearance / clarity parameter. |
BatchNumber,RadiochemicalPurityPercent,FreeIodine131Percent,BenzoicAcidImpurityPercent,SpecificActivityMBqPerMg,pH,EndotoxinsEU,SterilityTest,TotalActivityMBq,AppearanceScore I131-HIP-2026-001,97.5,1.5,1.0,35.0,7.0,45.0,0,185.0,0 I131-HIP-2026-002,93.0,4.0,3.0,28.0,7.2,50.0,0,180.0,0
FS — Functional Specification
| ID | Function | Implementation |
|---|---|---|
| FS-001 | CSV import | Read input.csv in UTF-8/CSV-compatible format and validate the header and expected columns. |
| FS-002 | Schema validation | Check mandatory fields and column count; report unknown or missing key fields. |
| FS-003 | Type conversion | Convert numeric, flag and text values; invalid formats are recorded as row-level errors. |
| FS-004 | Domain rule engine | Apply domain rules for Iodine-131 Hippuran, including critical limits from the utility description and approved specification. |
| FS-005 | Status aggregation | Produce final status: FAIL for critical failure, WARNING for non-critical deviation, PASS for conformance. |
| FS-006 | JSON export | Write output.json with detailed checks, source values, warnings, failures and critical findings. |
| FS-007 | Audit support | Keep the result structure suitable for review, deviation investigation, calculation reproduction and IQ/OQ preparation. |
| FS-008 | Integration contract | Support the production scenario: LIMS/ELN/MES creates input.csv, the utility returns output.json, the portal displays description and documentation. |
Example output.json
{
"utilityId": "iodine131-hippuran-quality-checker",
"api": "Iodine-131 Hippuran",
"overallStatus": "PASS|WARNING|FAIL",
"sourceFile": "input.csv",
"checks": [
{
"parameter": "BatchNumber",
"value": "I131-HIP-2026-001",
"status": "PASS|WARNING|FAIL",
"message": "Rule-based check result"
},
{
"parameter": "RadiochemicalPurityPercent",
"value": "97.5",
"status": "PASS|WARNING|FAIL",
"message": "Rule-based check result"
},
{
"parameter": "FreeIodine131Percent",
"value": "1.5",
"status": "PASS|WARNING|FAIL",
"message": "Rule-based check result"
},
{
"parameter": "BenzoicAcidImpurityPercent",
"value": "1.0",
"status": "PASS|WARNING|FAIL",
"message": "Rule-based check result"
},
{
"parameter": "SpecificActivityMBqPerMg",
"value": "35.0",
"status": "PASS|WARNING|FAIL",
"message": "Rule-based check result"
},
{
"parameter": "pH",
"value": "7.0",
"status": "PASS|WARNING|FAIL",
"message": "Rule-based check result"
},
{
"parameter": "EndotoxinsEU",
"value": "45.0",
"status": "PASS|WARNING|FAIL",
"message": "Rule-based check result"
},
{
"parameter": "SterilityTest",
"value": "0",
"status": "PASS|WARNING|FAIL",
"message": "Rule-based check result"
}
],
"criticalFindings": []
}
OQ/PQ test scenarios
| ID | Scenario | Expected result |
|---|---|---|
| OQ-001 | Valid sample row | PASS or acceptable WARNING according to the rules. |
| OQ-002 | Mandatory column missing | Schema error or FAIL. |
| OQ-003 | Non-numeric value in numeric field | Type-conversion error. |
| OQ-004 | Critical parameter outside limit | FAIL and critical finding. |
| PQ-001 | User real batch/lot | Reviewed result with input.csv and output.json retained. |
QA/QC and change control
- Do not rename columns without updating the validator and test set.
- Retain
input.csv,output.json, executable version and checksum. - Before production use, perform IQ/OQ/PQ or equivalent CSV/CSA verification.
- Critical radiopharmaceutical limits must be verified against the approved specification and local SOPs.
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