Sodium Pyruvate Aqueous Solution pH Stabilization
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Solution Overview
Problem
Aqueous solutions containing sodium pyruvate are unstable at room temperature, leading to the formation of cytotoxic dimers and hydrates, which limits their clinical use due to rapid degradation and inability to correct severe metabolic acidosis effectively.
Innovation Solution
A stable aqueous solution of sodium pyruvate is achieved by maintaining a pH of 3.0-6.0 with hydrogen ion or using NaCl to provide additional Na+, resulting in a solution that retains at least 95% of its initial concentration after six months at 25°C, with a molar ratio of dimer to sodium pyruvate less than 1:20 or 1:50, suitable for medical use in various formulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If aqueous solution containing sodium pyruvate is prepared at room temperature, then it is convenient for clinical usage and manufacturing, but the solution becomes unstable and forms cytotoxic dimers and hydrates
Solution Approach 1:
The patent changes the pH parameter of the solution to the acidic range (pH 3.0-6.0) to suppress the spontaneous aldol-like condensation reaction. This parameter change stabilizes the sodium pyruvate solution at room temperature, preventing dimer formation while maintaining convenience for clinical usage and manufacturing.
2Stability of the object's composition
If sodium pyruvate solution is stored at low temperature (4-8°C), then stability is improved, but storage and usage complexity increases
Solution Approach 1:
The patent changes the pH parameter to acidic range (pH 3.0-6.0), which fundamentally alters the stability characteristics of sodium pyruvate. This allows the solution to remain stable at room temperature (20-25°C) without requiring refrigeration, thereby simplifying storage and usage while maintaining high stability.
3Stability of the object's composition
If sodium pyruvate solution is prepared freshly and used immediately, then stability is maintained, but loss of time occurs and productivity decreases
Solution Approach 1:
The patent changes the pH parameter to acidic range (pH 3.0-6.0), which suppresses degradation reactions and enables long-term stability of sodium pyruvate solution at room temperature. This allows pre-prepared solutions to be stored for extended periods without significant degradation, eliminating the need for fresh preparation and thereby improving clinical treatment efficiency and productivity.
4Quantity of substance
If high concentration of sodium pyruvate (3.0 M) is prepared, then therapeutic effect is enhanced, but dimer formation increases rapidly
Solution Approach 1:
The patent changes the pH parameter to acidic range (pH 3.0-6.0), which suppresses the spontaneous aldol-like condensation reaction even at high concentrations. This allows preparation of high concentration sodium pyruvate solutions (up to 3.0 M or higher) that remain stable at room temperature, thereby achieving enhanced therapeutic effect without rapid dimer formation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The stable solution effectively delivers sodium pyruvate for metabolic pathway improvement and organ protection, correcting severe metabolic acidosis and improving organ function without toxicity, suitable for shock-resuscitation, intravenous therapy, and dialysis applications.
Implementation Method 1
a stabilizer of sodium pyruvate, which is selected from: (b1) hydrogen ion, which makes the solution at pH of 3.0-6.0
Implementation Method 2
NaCl, which provides additional Na+ of at least 20 mM
Data Source
AI summary
A stable aqueous solution of sodium pyruvate for medical use, which contains 10-1,200 mM sodium pyruvate and a stabilizer of sodium pyruvate, wherein the said stabilizer is H+ which leads to pH 3.0-6.0 or NaCl which provides at least 20 mM Na+.