Tc99mGlucoheptonateQualityChecker

Utility description: Tc-99m Glucoheptonate Quality Checker

Tc-99m Glucoheptonate Quality Checker — Technetium-99m Glucoheptonate for kidney and brain imaging

ℹ️  Utility checks critical parameters of Tc-99m Glucoheptonate (GH):
    • Radiochemical purity (≥95%)
    • Free pertechnetate (≤5%)
    • Reduced/hydrolyzed technetium (≤5%)
    • pH (4.5-7.5), Aluminum (<5 ppm)
    • Stability (≤6 hours) — PRONE TO OXIDATION!

⚠️  CRITICAL: Glucoheptonate is less stable than DTPA or MAG3!
    Use after 6 hours leads to accumulation in liver and thyroid gland.
    Used for renal cortical scintigraphy (especially in pediatrics) and brain imaging.

Usage:
  Tc99mGlucoheptonateQualityChecker.exe                            → demo mode (console output)
  Tc99mGlucoheptonateQualityChecker.exe input.csv output.json      → evaluate your data

Input format:
BatchNumber,RadiochemicalPurityPercent,FreePertechnetatePercent,ReducedHydrolyzedTechnetiumPercent,AluminumOxidePPM,pH,EndotoxinsEU_per_mL,SterilityTest,HeavyMetalsPPM,HoursSincePreparation,ActivityMBq

Example:
  TC99M-GH-2026-001,97.0,1.5,1.5,3.0,6.0,40.0,0,4.0,3.0,700.0

— WHY IS THIS NEEDED?
Technetium-99m Glucoheptonate (GH) is a unique dual-action radiopharmaceutical:
• 6.02-hour half-life, 140 keV gamma radiation.
• Mechanism: rapid glomerular filtration + slow binding to proximal tubules.
• Allows assessment of both kidney function (early phases) and cortical anatomy (late phases).
• Penetrates disrupted blood-brain barrier, making it useful for diagnosing brain tumors and abscesses.
• Often used in pediatrics due to favorable dosimetry.

⚠️  CRITICAL:
• Radiochemical purity ≥95% — GH complex is less robust than DTPA/MAG3 and dissociates more easily.
• Free pertechnetate ≤5% — accumulates in thyroid and stomach, masking pathology.
• Reduced technetium ≤5% — colloids are taken up by liver, creating background during kidney studies.
• Usage time ≤6 hours — CRITICAL PARAMETER! GH is subject to oxidation and transchelation faster than other agents. After 6 hours, RCP may drop sharply.
• pH 4.5-7.5 — necessary to prevent hydrolysis and ensure biocompatibility.
• Aluminum <5 ppm — excess Al³⁺ catalyzes GH complex decomposition.

Key features:
• Strict stability time control (6 hours vs 8-12 for other drugs).
• Check of all standard safety parameters (sterility, endotoxins, heavy metals).
• Suitability assessment for two types of studies (kidneys and brain).
• Compliance with Ph. Eur. monograph on Technetium (99mTc) gluconate/glucoheptonate.

Critical parameters:
• Radiochemical purity: ≥95.0%
• Free pertechnetate: ≤5.0%
• Reduced technetium: ≤5.0%
• Aluminum oxide: <5.0 ppm
• pH: 4.5–7.5
• Endotoxins: <175 EU/mL
• Sterility: no growth
• Heavy metals: ≤10 ppm
• Stability time: ≤6 hours
• Minimum activity: ≥200 MBq

💡 Usage tips:
1. Prepare the drug immediately before use, avoid prolonged storage.
2. Do not use the drug if it has changed color or become turbid (sign of Sn²⁺ oxidation).
3. Brain studies require higher doses, so check activity carefully.
4. If RCP <95%, use only for qualitative assessment, not quantitative.
5. Store the kit in the refrigerator and protect from light to extend lyophilizate shelf life.

⚠️ Note: Tc-99m GH occupies a niche between purely filtration (DTPA) and purely secretory (MAG3) drugs. Its ability to fixate in the renal cortex allows obtaining excellent static images, but this feature requires impeccable radiochemical purity, as free technetium can also weakly bind to tissues, distorting the picture.