dextran 40 Description

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DESCRIPTION

LMD (dextran 40) is a sterile, nonpyrogenic preparation of low molecular weight dextran (average mol. wt. 40,000) in 5% Dextrose Injection or 0.9% Sodium Chloride Injection. It is administered by intravenous infusion.

Also described as low viscous or low viscosity dextran, dextran 40 is prepared by acid hydrolysis and differential fractionation of a crude macromolecular polysaccharide produced from the fermentation of sucrose by the bacterium, Leuconostoc mesenteroides (strain B-512). The crude material is composed of linked glucose units. In the fraction represented by dextran 40, 80% of the molecules have a molecular weight ranging from 10,000 to 90,000 (average approximately 40,000) when measured by a light scattering method. More than 90% of the linkages are of the 1,6 alpha glucosidic, straight chain type.

Each 100 mL of 10% LMD (dextran 40) in 5% Dextrose Injection contains 10 g dextran 40 and 5 g dextrose hydrous in water for injection. Total osmolar concentration is 255 mOsmol/liter (calc.); pH is 4.4 (3.0 to 7.0).

Each 100 mL of 10% LMD (dextran 40) in 0.9% Sodium Chloride Injection contains 10 g dextran 40 and 0.9 g sodium chloride in water for injection. Total osmolar concentration is 310 mOsmol/liter (calc.); pH is 4.9 (3.5 to 7.0) (may contain sodium hydroxide and/or hydrochloric acid for pH adjustment). Electrolyte concentration per liter: Na+ 154 mEq; Cl- 154 mEq (not including ions for pH adjustment).

The solutions contain no bacteriostat, antimicrobial agent or added buffers (except for pH adjustment) and are intended only for single-dose injection. When smaller doses are required the unused portion should be discarded.

10% LMD (dextran 40) is an artificial colloid pharmacologically classified as a plasma volume expander; 5% Dextrose Injection is a fluid and nutrient replenisher; 0.9% Sodium Chloride Injection is a fluid and electrolyte replenisher.

Dextran 40 is a linear glucose polymer (polysaccharide) chemically designated (C6 H10 O5)n.

The structural formula for dextran (repeating unit) is:

structural formula dextrose

Dextrose, USP is chemically designated D-glucose monohydrate (C6 H12 O6 • H2O), a hexose sugar freely soluble in water.

Sodium Chloride, USP is chemically designated NaCl, a white crystalline powder freely soluble in water.

Water for Injection, USP is chemically designated H2O.

The flexible plastic container is fabricated from a specially formulated polyvinylchloride. Water can permeate from inside the container into the overwrap but not in amounts sufficient to affect the solution significantly. Solutions inside the plastic container also can leach out certain of the chemical components of the plastic in very small amounts before the expiration period is attained. However, safety of the plastic has been confirmed by tests in animals according to USP biological standards for plastic containers.

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Description

DESCRIPTION

LMD (dextran 40) is a sterile, nonpyrogenic preparation of low molecular weight dextran (average mol. wt. 40,000) in 5% Dextrose Injection or 0.9% Sodium Chloride Injection. It is administered by intravenous infusion.

Also described as low viscous or low viscosity dextran, dextran 40 is prepared by acid hydrolysis and differential fractionation of a crude macromolecular polysaccharide produced from the fermentation of sucrose by the bacterium, Leuconostoc mesenteroides (strain B-512). The crude material is composed of linked glucose units. In the fraction represented by dextran 40, 80% of the molecules have a molecular weight ranging from 10,000 to 90,000 (average approximately 40,000) when measured by a light scattering method. More than 90% of the linkages are of the 1,6 alpha glucosidic, straight chain type.

Each 100 mL of 10% LMD (dextran 40) in 5% Dextrose Injection contains 10 g dextran 40 and 5 g dextrose hydrous in water for injection. Total osmolar concentration is 255 mOsmol/liter (calc.); pH is 4.4 (3.0 to 7.0).

Each 100 mL of 10% LMD (dextran 40) in 0.9% Sodium Chloride Injection contains 10 g dextran 40 and 0.9 g sodium chloride in water for injection. Total osmolar concentration is 310 mOsmol/liter (calc.); pH is 4.9 (3.5 to 7.0) (may contain sodium hydroxide and/or hydrochloric acid for pH adjustment). Electrolyte concentration per liter: Na+ 154 mEq; Cl- 154 mEq (not including ions for pH adjustment).

The solutions contain no bacteriostat, antimicrobial agent or added buffers (except for pH adjustment) and are intended only for single-dose injection. When smaller doses are required the unused portion should be discarded.

10% LMD (dextran 40) is an artificial colloid pharmacologically classified as a plasma volume expander; 5% Dextrose Injection is a fluid and nutrient replenisher; 0.9% Sodium Chloride Injection is a fluid and electrolyte replenisher.

Dextran 40 is a linear glucose polymer (polysaccharide) chemically designated (C6 H10 O5)n.

The structural formula for dextran (repeating unit) is:

structural formula dextrose

Dextrose, USP is chemically designated D-glucose monohydrate (C6 H12 O6 • H2O), a hexose sugar freely soluble in water.

Sodium Chloride, USP is chemically designated NaCl, a white crystalline powder freely soluble in water.

Water for Injection, USP is chemically designated H2O.

The flexible plastic container is fabricated from a specially formulated polyvinylchloride. Water can permeate from inside the container into the overwrap but not in amounts sufficient to affect the solution significantly. Solutions inside the plastic container also can leach out certain of the chemical components of the plastic in very small amounts before the expiration period is attained. However, safety of the plastic has been confirmed by tests in animals according to USP biological standards for plastic containers.

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