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17. Mr. J is receiving a pureed 2000 calorie diet per NG tube. In addition, he is receiving 1 can of Jevity (250 cal/ 8 oz) per shift. What is his daily caloric intake?18. Two 4 oz. Cans of formula and 80 cc water were added to the feeding bag. What strength feeding had been ordered?19. Mr. R. is to receive milk through his NG tube at 30 cc/ hr. Milk supplies 90 cal/ ½ cup and is available in quart containers. How many calories per day is Mr. R. receiving?7. Weight Based CalculationsIn weight based calculations, the mg/kg/day or dose is the bridge factor.Example:Order: Gentamicin 8 mg/kg/day q6h for a child weighing 35 kgGive _____ mg per dose12
Starting Factor: 35 kgUnit Answer: mg/doseBridge Factor: 8 mg/kg/day Step 1: Make sure that the weight is in kg. If in pounds, convert to kg.Pt weighs 35 kgStep 2: Multiply the starting factor by the bridge factor35 kg x 8 mg= 280 mg/daykgdayStep 3: Figure out the dose280 mg/day / 4 (q6h)Answer: 70 mgDoses within a RangeFor problems asking about doses within a range, calculate the low and high ends of the range and then compare with the patient’s ordered dose. Example:10 kg Patient is ordered 150 mg Tylenol. The safe dosage range is 10-20 mg/kg/dose. Is the ordered dose safe for this patient?Starting Factor: 10 kgUnit Answer: mg/doseBridge Factors: 10 mg/kg/dose; 20 mg/kg/doseStep 1: Calculate the low end of the range10 kg x 10 mg= 100 mg/doseKgDoseStep 2: Calculate the high end of the range10 kg x 20 mg= 200 mg/doseKgDoseStep 3: Compare the patient’s ordered dose with the dosage rangeOrdered: 150 mg/doseRange: 100-200 mg/dose13
Step 4: Answer the questionYes, the ordered dose is safe for this patientA.Practice Problems1. Order: Give "Drug C" IV piggyback for a child weighing 66 lb. at a dosage of 50 mg/kg/day in divided doses q6h. How many mg would each dose contain?2. Order: Tetracycline Elixir qid for a child weighing 50 lb at a dosage of 8 mg/kg/day in equally divided doses. How many mg would one does contain?3. Tetracycline is supplied at 50 mg per 7 ml. How many ml should be administered?4. Order: Quinidine for an adult patient weighing 110 lb. at a dosage of 25 mg/kg/day q6h. How many mg should the dose contain? Quinidine is supplied as 300 mg tablets. How many should be given?5. Order: Ampicillin IVPB for a child weighing 55 lb. at a dosage of 20mg/kg/day in 4 equally divided doses. How many mg would be given per dose? The Ampicillin is supplied as 250 mg in 1.5 ml after reconstitution. Give ______ ml.B.Homework Problems1. Order: Pronestyl orally for a patient who weighs 198 lb. at a dose of 25 mg/kg/day given at 6 hour intervals. Give _____ mg.2. Order: Garamycin 35 mg IM q6h for a child weighing 42 lb.The recommended dose is 6 - 7.5 mg/kg/day in 4 equally divided doses.Is the order within the safe range? Garamycin is supplied as 80 mg/ml. Give _____ ml.
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Nursing, Trigraph, Orders of magnitude, Litre, Intravenous therapy, ml/hr