Gelatin for preventing conglutination in the surgical and the method for preparing the same
A surgical operation and anti-adhesion technology, which is applied in the direction of surgical drugs, pharmaceutical formulas, medical preparations containing active ingredients, etc., can solve the problems of difficult control of purity and degradation speed, non-degradable absorption, and tissue stimulation, etc., to achieve excellent Bio-barrier properties, easy absorption by the body, and the effect of preventing tissue adhesion
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Embodiment 1
[0035] An anti-adhesion gel for surgery, comprising 1 part by weight of refined modified carboxymethyl chitosan with a molecular weight of 350,000-400,000 daltons and 30 parts by weight of water for injection, and the dynamic viscosity of the anti-adhesion gel is 900 centipoise; prepared The method steps are as follows:
[0036] (1) Removal of pyrogens such as impurity proteins in chitin raw materials
[0037] Weigh 2kg of commercially available chitin with a molecular weight of about 750,000 Daltons, add 6kg of aqueous sodium hydroxide solution, the concentration of aqueous sodium hydroxide solution is 20% (w / v), stir at 70°C for 6 hours, and dissolve with pyrogen-free water. Chitin was rinsed until the pH was neutral, and dried for later use.
[0038] (2) Carboxymethylation modification of chitin
[0039] Weigh 1 kg of chitin treated in step (1), soak it with 3 kg of 45% (w / v) sodium hydroxide aqueous solution at room temperature for 3 hours, and stir fully at 100-120 rpm....
Embodiment 2
[0049] An anti-adhesion gel for surgery, comprising 1 part by weight of refined modified carboxymethyl chitosan with a molecular weight of 600,000-650,000 daltons and 20 parts by weight of water for injection, and the dynamic viscosity of the anti-adhesion gel is 2800 centipoise; The preparation method steps are as follows:
[0050] (1) Remove pyrogens such as impurity protein in raw materials
[0051] Weigh 2kg of commercially available chitin with a molecular weight of about 900,000 Daltons, add 10kg of aqueous sodium hydroxide solution, the concentration of aqueous sodium hydroxide solution is 25% (w / v), stir at 80°C for 5 hours, and dissolve the chitin with pyrogen-free water. Chitin was rinsed until the pH was neutral, and dried for later use.
[0052] (2) Carboxymethylation modification of chitin
[0053] Weigh 1 kg of the above-mentioned chitin, soak it with 4 kg of 50% (w / v) sodium hydroxide aqueous solution at room temperature for 5 hours, and fully stir at 100-120 rp...
Embodiment 3
[0063] Under aseptic conditions, take the carboxymethyl chitosan refined after drying in embodiment 2, prepare the anti-adhesion gel preparation according to the following ratio with a pyrogen-free utensil:
[0064] Refined carboxymethyl chitosan 0.1kg
[0065] Water for injection 2.5kg
[0066] Anti-adhesion gel dynamic viscosity 1600 centipoise
[0067] The above-mentioned anti-adhesion gel is fully stirred and fully swollen, and canned in disposable medical syringes under aseptic conditions, with a filling specification of 2 ml / bottle, and stored at 0°C-10°C for future use.
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