Question

1.         Weight in kilograms.                                                 

                        2.         Recommended dosage calculated for the patient.           

                        3.         If the ordered dosage is safe.                                     

                        4.         The amount of medication you would administer     

                                    in mls, whether a safe dose or not.

Keflex 500 mg IV every 6 hours                                                               

            Weight: 35 lbs

            Age: 4 years old

            Recommended dose: 14-27 mg/kg IV every 6 hours

            Supplied: 1 mg/4.4mL

Answer 1

Given data:-

Keflex 500 mg IV every 6 hours

Weight: 35 lbs

Age: 4 years old

Recommended dose: 14-27 mg/kg IV every 6 hours

Supplied: 1 mg/4.4 ml

1. Weight of patient = 35 lbs

= 35× 0.454 kg [as, 1 lb = 0.454 kg so, 35 lbs = 0.454 × 35 kg]

= 15.89 kg

Weight of patient (in kg) = 15.89 kg

2. Now, recommended dose = 14-27 mg /kg

Overall recommended dose= recommended dose × weight of patient

=( 14 to 27 mg/kg) × 15.89 kg

=(14 mg/kg to 27 mg/kg) ×15.89 kg

=14 mg/kg ×15.89 kg to 27 mg/kg × 15.89 kg

=222.56 mg to 420.93 mg

Therefore,range of safe recommended dosage for the patient= 222.56 mg to 420.93 mg

3. Now, maximum safe single dose = 420.93 mg

Ordered dose(single dose) = 500 mg keflex per dose

Therefore, the dose is not safe. ( greater than maximum recommended dose)

4. Hence, the amount of dose admistered should not be greater than maximum safe dose.

So, maximum amount of medication should be administered= 420.93 mg keflex

Now, supplied: 1 mg/4.4 ml

Using unitary method:-

1 mg present in 4.4 ml

420.93 mg present in=4.4 ×420.93 ml

= 1852 ml  

Amount of medication should be administered = 1852 ml which is safe.