RINGOLACT-D
(Lactated Ringer’s and 5% Dextrose Injection U.S.P)
Therapeutic Class
- Isotonic crystalloid solution and carbohydrate source.
Description and Composition
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A clear, colorless solution, each 1000 ml. of which contains: |
Calcium Chloride 2H2O |
0.2 grams |
Potassium Chloride |
0.3 grams |
Sodium Chloride |
6.0 grams |
Sodium Lactate |
3.1 grams |
Dextrose Monohydrate |
50.0 grams |
Water for Injections q.s. |
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Indications
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- Hypovolemic states such as those induced by severe diarrhea and vomiting.
- Trauma and burns.
- Environmental emergencies such as severe perspiration leading to dehydration and heat illness.
- Also indicated for the prevention and replenishment of extracellular fluid before, during and after surgery.
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Pharmacological Effects
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- 5% Dextrose and Lactated Ringer’s Injection has an electrolyte composition and concentration similar to that of the extracellular fluid along with added dextrose which acts as a caloric source.
- In stressful situations, e.g. surgery, provision of dextrose prevents gluconeogenesis, which otherwise occurs due to catabolism of fats and proteins.
- Provides calories for some metabolic needs. Each 100mL provides 5 grams of Dextrose and each gram of Dextrose Monohydrate provides 3.4kCal. Depending on the presence of insulin, glucose enters cells and is broken down to pyruvate. With adequate oxygen, it enters the Kreb's cycle in the mitochondria and is converted into energy (A.T.P.), CO2 and H2O. The brain does not require insulin for glucose metabolism.
- Even large volumes of infusion of the solution do not easily cause sodium excess and hyperchloremic acidosis.
- It expands circulating blood volume by approximating the fluid and electrolyte composition of the blood along with providing energy.
- Provides the following electrolytes in each liter of fluid:
|
Sodium |
130 mEq. |
Chloride |
108.7 mEq. |
Potassium |
4 mEq. |
Calcium |
2.7 mEq. |
Bicarbonate(as Lactate) |
28 mEq. |
- Lactate is metabolized by the liver and converted to bicarbonate. One mole of lactate is metabolized in the body to produce one mole of bicarbonate. Therefore its administration has the same effect as that of bicarbonate.
- The presence of lactate not only eliminates any chances of dilutional acidosis, but also aids in the correction of mild acidosis.
- The infusion of 5% Dextrose and Ringer’s Lactate, does not induce hypokalemia and hypocalcemia as compared to normal saline.
- The pH range is 3.5 - 6.5.
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Pharmacological Effects
The usual infusion rate is 300-500 ml/hour (about 75-125 drops/minute) for adults and 50-100ml/hour (about 12-25 drops/minute) for children.
The dosage should be adjusted according to the age, weight and clinical condition of the patient. However, for non-diabetics, the maximum infusion rate of dextrose should be 4mg/kg/minute. At this rate the hepatic glucose production is minimized and peripheral glucose uptake maximized.