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Dosage and calculations
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Terms in this set (35)
calculating IV drop factors
Volume (mL)/Time (hr) * drop factor (gtt/ml)/60
different types of syringes and uses
tuberculin - tb tests, intradermal, 1 mL, tenths to hundreths calibration
insulin - insulin only, U-100, lo dose and 1 mL, units, subq
IM - intermuscular
PCA patient controlled analgesia name different parts
morphine (1 mg/mL) - concentration
Continuous/basal dose - amount that goes in even if the pump is not pushed by patient
PCA (demand dose) - what is given when patient pushes the pump
Locket (PCA) interval -amount of time that the pump is locked out for
Hourly dose limit (includes continuous dose) - the maximum amount the patient can push within an hr
Clinical loading dose - the amount that the RN administers from the beginning, the very first dose
Rule of 9's
parkland burn formula that determines the percentage of the body is burned. Add together the percentages anterior and posterior.
PCA calculations patient push
total amount received (mL)/ PCA dose = number of pushes by pt.
PCA calculations dose per hr
divide 60 mins/PCA lockout = number of total doses
PCA dose * number of total doses = PCA dose per hr
calculating doses
(Dose order/ dose on hand) * Quantity = X dose
Determining infusion times and volumes
Xgtt/min= amount of solution (mL) * drop factor / Time (min)
reading prescription labels
know equivalents
other sheet
order: amoxil 0.5 g po q6h
available: amoxil caps 250 mg/capsule
how many capsules will pt receive
(500 mg/250 mg) * 1 = 2 capsules
to ensure accuracy and reduce misinterpretation place a zero before the decimal point T/F
true
bid
twice a day
pc
after meals
5.2 kg = ? g
5200 g
30 mL = ? oz
1 oz
10 t = ? mL
50 mL
1 t = ? mL
4 mL
80 mg is equivalent to
0.08 g
a medicine ordered q6h would be given how many times a day
4
1 oz is equivalent to
30 mL
order: furosomide 15 mg IM qd
available: furosomide 20 mg/2 mL
how many milliliters will be administered?
15 mg/ 20 mg * 2 =
1.5 mL
order: compazine 8 mg po stat
available: compazine syrup labeled 5 mg per 5 mL
How many milliliters will you administer?
5 mg/5mL = 1 to 1
8mg =8 mL
A client's intake was the following:
1 1/4 cup (10 oz) of coffee, 4 oz of cranberry juice, 1 1/2 bowl of chicken broth (9 oz), 3 1/2 glasses of water (21 oz)
The client voided urine as follows: 240 mL, 160 mL, 500 mL and 425 mL
Calculate the client's intake and output in mL
A. Intake: ___mL
B. Output: ___mL
intake: 23+21 = 44 oz = 44*30 = 1320 mL
output:1365 mL
The physician prescribes 1000 mL of normal saline to be infused over a period of 10 hrs. The drop factor is 15 drops/mL. The nurse adjusts the flow rate at how many drops per minute?
Volume (mL)/Time (hr) * drop factor (gtt/mL)/60
1000 mL/ 10 hr* 15 gtt/mL/60 = 25 gtt/min
the client is to receive 1000 mL of D5W at 100 mL/hr. The drop factor is 10 drops/mL. The nurse adjusts the flow rate to deliver how many drops per minute?
Volume (mL)/Time (hr) * drop factor (gtt/mL)/60
1000 mL/10 hrs * 10 gtt/mL/60 = 16.6=17
The physician orders 500 mL of 0.9% normal saline to rub over 6 hrs. The drop factor is 10 drops/mL. The nurse adjusts the flow rate to run at how many drops per minute?
Volume (mL)/Time (hr) * drop factor (gtt/mL)/60
500 mL/6 hrs * 10 gtt/mL/60 = 14
The physician's order reads cyanocobalamin (Vit B12), 150 mcg IM. The medication label reads cyanocobalamin, 100 mcg/mL. The nurse prepares to administer how many mL to the client?
100 mcg per 1 mL 150 mcg = 1.5 mL
150/X = 100/1 mL =
100X=150=
150/100=1.5 mL
850 mL ringer lactate at 40 mL/hr
Determine the infusion time and completion time in military and traditional time
The IV was started at 7am when will the infusion be complete?
...
What type of syringe is used for heparin?
tuberculin
What type of syringe is used for Humulin regular U-100 units
insulin
A child weighs 45 lbs what is their weight in kg? Always round weights to the tenth place
45 / 2.2 = 20.5 kg
A child is ordered gentamicin 45 mg IV q8h, the recommended dosage is 6-7.5 mg/kg/day in 3 divided doses, what is the safe 24 hr dosage range for this child? Is his dosage safe? round to nearest tenth place
6*20.5 = 123
7.5 * 20.5 = 153.75
range: 123 mg - 153.8 mg
Yes 45 mg is safe because 45 * 3 = 135 mg
how to calculate Body surface area
Formula
BSA= Sq root (Wt (kg) * Ht (cm))0/3600
calculate the body surface area using formula for a child weighing 13 kg and 65 cm.
BSA= Sq root (Wt (kg) * Ht (cm))/3600
Sq root ((13 kg * 65 cm)/3600) = 0.48 = 0.5
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