Compositions comprising PVP having an average molecular weight in the range of 3.000 to 14.000 daltons
First Claim
1. A composition suitable for use in medicine as an infusion solution, a haemodilation solution or a surgical rinse solution, comprising an aqueous colloidal solution of physiologically inert PVP having colloidal osmotic pressure and a weight average molecular weight in the range of from 7,000 to 12,000 Daltons, said solution being substantially free of chemical impurities with an amine content of less than about 10 ppm, a peroxide content of less than about 20 ppm, a solvent content of less than about 10 ppm wherein said solvent is isopropanol, t-butanol or acetone, and being substantially free from PVP having a molecular weight above 50,000 Daltons.
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Abstract
The present invention relates to compositions for use in medicine, e.g. as infusion or surgical rinse solutions, and to processes for their preparation. The compositions of the invention comprise an aqueous solution of physiologically inert PVP having a weight average molecular weight in the range of from 3,000 to 14,000 daltons.
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15 Claims
- 1. A composition suitable for use in medicine as an infusion solution, a haemodilation solution or a surgical rinse solution, comprising an aqueous colloidal solution of physiologically inert PVP having colloidal osmotic pressure and a weight average molecular weight in the range of from 7,000 to 12,000 Daltons, said solution being substantially free of chemical impurities with an amine content of less than about 10 ppm, a peroxide content of less than about 20 ppm, a solvent content of less than about 10 ppm wherein said solvent is isopropanol, t-butanol or acetone, and being substantially free from PVP having a molecular weight above 50,000 Daltons.
- 10. A process for the preparation of a composition suitable for use in medicine as an infusion solution, a haemodilation solution or a surgical rinse solution, comprising an aqueous colloidal solution of physiologically inert PVP having colloidal osmotic pressure and a weight average molecular weight in the range of from 7,000 to 12,000 Daltons, said solution being substantially free of chemical impurities with an amine content of less than about 10 ppm, a solvent content of less than about 10 ppm wherein said solvent is isopropanol, t-butanol or acetone, a peroxide content of less than about 20 ppm, and being substantially free from PVP having a molecular weight above 50,000 Daltons, said process comprising a step of passing a PVP solution over a cation exchange resin.
Specification