Medical Mathematics

A resident is to receive 1 milligram of a A resident is to receive 1 milligram of a medication per dose. If a solution has 5 medication per dose. If a solution has 5 milligrams of the medication in 30 milliliters milligrams of the medication in 30 milliliters of solution, how much solution should the of solution, how much solution should the resident receive?resident receive?

5 mg = 1 mg

30 ml 6 ml

A radiology patient needs to drink one half A radiology patient needs to drink one half liter of contrast fluid prior to a procedure. liter of contrast fluid prior to a procedure. How many 100 cc containers will the How many 100 cc containers will the patient need to drink?patient need to drink?

1 cc = 1 ml

1000 ml = 1 L

0.5 Liters = 500 ml

500 ml = 5 containers

100 ml

X o

The number of ml that a 300 cc container The number of ml that a 300 cc container can hold is?can hold is?

1 cc = 1 ml

300 cc = 300 ml

A premature infant weighing 875 grams A premature infant weighing 875 grams weighs how many milligrams?weighs how many milligrams?

1 g = 1000 mg

875 g = 875,000 mg

X o

How many mm of gauze bandage is needed How many mm of gauze bandage is needed to cover a wound that is 4 cm in length?to cover a wound that is 4 cm in length?

1 cm = 10 mm

4 cm = 40 mm

X o

5 milliliters is equal to 5 what?5 milliliters is equal to 5 what?

ml = cc

5 ml = 5 cc

How many milliliters are in 2.5 liters?How many milliliters are in 2.5 liters?

1 L = 1000 ml

2.5 L = 2500 ml

x o

How many cc’s are in 0.5 liters of fluid?How many cc’s are in 0.5 liters of fluid?

1 L = 1000 ml

0.5 L = 500 ml

1 ml = 1 cc

500 ml = 500 cc

x o

Three yards of elastic bandage is needed to Three yards of elastic bandage is needed to wrap an athlete’s ankle. How many wrap an athlete’s ankle. How many meters of bandage will be used?meters of bandage will be used?

1 yd = 0.914 m

3 yd = 2.75 m

3 yd = 36 in and 1 in = 2.54 cm

36 x 2.54 cm = 91.44 cm = .914 m

The average youth brain weighs 30 ounces The average youth brain weighs 30 ounces or how many Kg?or how many Kg?

16 oz (1 lb) = 0.45 Kg

30 = 1.875 lbs

16

1.875 lbs x .45 = 0.84 Kg

1 kg = 2.2 lbs

30/16 = 1.875 lb ÷ 2.2 = 0.85 Kg

Susie has been on a diet and has lost 5 Susie has been on a diet and has lost 5 Kilograms. How many pounds has she Kilograms. How many pounds has she lost?lost?

1 kg = 2.2 lbs

5 kg x 2.2 lbs = 11 lbs

Johnny weighed 10 lbs on his 2 month Johnny weighed 10 lbs on his 2 month check-up. How many kilograms did he check-up. How many kilograms did he weigh?weigh?

1 kg = 2.2 lbs

10 lbs ÷ 2.2 = 4.5 Kg

1 lb = 0.45 Kg

10 x 0.45 = 4.50 Kg

The capacity of the right atrium is The capacity of the right atrium is approximately 2.3 ounces. What does this approximately 2.3 ounces. What does this equal in cc’s?equal in cc’s?

1 oz = 30 ml

2.3 oz x 30 = 69 ml = 69 cc

How many ml of liquid medication can a How many ml of liquid medication can a tablespoon hold?tablespoon hold?

1 T = 15 ml

Which kitchen utensil is BEST to use when Which kitchen utensil is BEST to use when measuring 15 ml of cough syrup?measuring 15 ml of cough syrup?

Tablespoon

What is the length in inches of a newborn What is the length in inches of a newborn baby measured to be 42 cm?baby measured to be 42 cm?

1 in = 2.54 cm

42 cm ÷ 2.54 = 16.5 in

A surgical scar which measures 4.6 cm is A surgical scar which measures 4.6 cm is how many inches long?how many inches long?

1 in = 2.54 cm

4.6 ÷ 2.54 = 1.8 in

A surgeon removes a 200 g tumor from a A surgeon removes a 200 g tumor from a patient. How many ounces does this patient. How many ounces does this tumor weigh?tumor weigh?

1 kg = 2.2 lbs

1000 g = 2.2 lbs

200 g = .44 lbs

1lb = 16 oz

.44 ÷ 16 = 7.04 oz

16 oz (1 lb) = 0.45 Kg = 450 g

200 ÷ 450 = .44 lbs

.44 ÷ 16 = 7.04

Approximately how many kilograms does a Approximately how many kilograms does a 200 pound patient weigh?200 pound patient weigh?

1 kg = 2.2 lbs

200 lbs ÷ 2.2 = 90.9 kg

How many kilograms are equal to 30 lbs?How many kilograms are equal to 30 lbs?

1 kg = 2.2 lbs

X kg = 30 lbs

2.2 X = 30 lbs

X = 30÷2.2 = 13.6 kg