German Heyl Succinate Calcium Trisodium Salt Injection: Mechanism of Action and Clinical Application of Heavy Metal Poisoning Chelating Agent
Ditripentat HeylAmp. is a heavy metal chelating agent that specifically binds to heavy metal ions to form stable complexes that are excreted from the body. It is mainly used for detoxification treatment of lead, cadmium and other poisoning. The following provides a detailed explanation from two aspects: the mechanism of action and clinical application.
mechanism of action
1. Chemical chelation principle: Carboxylic acid groups in molecules form highly stable water-soluble complexes with heavy metal ions (such as Pb ² ⁺, Cd ² ⁺), blocking the binding of heavy metals to biomolecules.
2. Metabolic pathway: The formed complex is excreted by the kidneys with a half-life of about 2-4 hours and requires multiple administrations to maintain effective blood drug concentration.
3. Selective binding: Strong affinity for divalent metal ions, especially for lead ions, with low calcium ion substitution rate, reducing the risk of electrolyte imbalance.
clinical application
1. Scope of indications: Acute lead poisoning (blood lead ≥ 45 μ g/dL), chronic lead poisoning with symptoms or organ damage, and adjuvant treatment for cadmium poisoning.
2. Treatment plan: Adults should receive intravenous infusion of 1-2g per day, and children should receive 20-40mg/kg. The treatment course should be 5-7 days and adjusted according to blood lead monitoring.
3. Combination therapy: In severe poisoning, it can be used sequentially with dimercaptopropanol to enhance lead excretion.
4. Efficacy evaluation: Effective standards include an increase of 50% or more in urinary lead excretion and symptom relief, and monitoring of renal function and electrolytes is required.
Precautions
1. Taboo population: Severe renal insufficiency (GFR<30mL/min), lactating women, and known allergy sufferers are contraindicated.
2. Special monitoring: During the treatment period, daily monitoring of urine volume, blood creatinine, and electrolytes is necessary to prevent damage to the renal tubules.
3. Adverse reactions: Transient dizziness, pain at the injection site, and occasional transient elevation of transaminase may occur.
4. Drug interactions: Avoid using with calcium containing preparations as it may reduce chelation efficiency.
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