Metric System Measurements In Healthcare-globalpint

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Metric System Measurements In Healthcare.

Systems both the imperial and metric measure are used in prescribing drugs and medicines. Many of the drugs are now being produced by the manufacturers in the metric system, but some are still being dispensed in the imperial system, therefore the healthcare personnel must be familiar with both systems and also be able to convert one to the other.

People are encouraged to use the metric system because soon, not only drugs and medicines will be produced and dispense in this system but household commodities such as sugar, butter, milk, meat and so on will be weighed and measured in the metric system. Meanwhile the healthcare personnel must make sure that he or she is familiar with medicines from both systems.

 

IMPERIAL SYSTEM

APOTHECARIES’ MEASURE OF WEIGHT

This is the table used in dispensing medicines and drugs

60 grains(gr) = 1 drachm (dr)

8 drachms    = 1 ounce or 480 grains

12 ounces    = 1 pound (Ib)

 

APOTHECARIES’ FLUID MEASURE

This is the table also used in dispensing medicines and drugs

60 minims(m)   = 1 fluid drachm (fl dr)

8 fluid drachms= 1 fluid ounce (fl oz)

20 fluid ounces= 1 pint

8 pint               = 1 gallon

 

THE METRIC SYSTEM

METRIC MEASURE OF WEIGHT

1000 picograms (pg)   = 1 nanogram (ng)

1000 nanograms         = 1 microgram (µg)

1000 micrograms        = 1 milligram (mg)

10 milligrams              = 1 centigram (cg)

10 centigrams             = 1 decigram (dg)

10 decigrams              = 1 gram (g)

10 grams                     = 1 decagram (dg)

10 decagrams             = 1 hectogram (hg)

10 hecctogram           = 1 kilogram (kg)

NOTE: 1000 milligrams = 1 gram

1000 grams        = 1 kilogram

 

METRIC MEASURE OF VOLUME

1 millilitre of water weighs 1 gram at 4 degrees centigrade

10 millilitres (ml)            = 1 centilitre (cl)

10 centilitres                  = 1 decilitre (dl)

10 decilitres                   = 1 litre (l)

10 litres                         = 1 decalitre (dal)

10 decalitres                 = 1hectolitre (hl)

10 hectolitres               = 1 kilolitre (kl)

NOTE: 1000 millilitres   = 1 litre

 

DOMESTIC MEASURES

The sizes of various domestic appliances vary so greatly that as such they are not recommended as measures for medicines. There are some hospitals that are still using medicine glasses that are graduated in teaspoons, dessertspoons and tablespoons. If a healthcare personnel is required to measure a medicine in such a glass, he or she will realize that these glasses have been marked according to the table of apothecaries fluid measure and the following are only very approximate equivalents:

1 teaspoonful        = 1 drachm  = 3.5 ml

1 dessertspoonful = 2 drachms = 7 ml

1 tablespoonful    = 4 drachm   = 14 ml

1 teacupful           = 5 ounces    = 150 ml

1 tumblerful         = 10 ounces  = 300 ml

 

EQUIVALENT

To aid the healthcare personnel in converting from the imperial system to the metric system and vice versa. Below are some useful approximate equivalents

APOTHECARY WEIGHTS TO METRIC

1/2 ounce            = 15.5 grams (g)

1 ounce               = 31 g

120 grains           = 8 g

60 grains             = 4 g

30 grains             = 2 g

15 grains             = 1 g

10 grains             = 647 milligrams (mg)

7 and half grains = 486 mg

6 grains               = 389 mg

5 grains               = 323 mg

4 grains               = 259 mg

3 grains               = 194 mg

2 and half grains = 162 mg

2 grains               = 130 mg

1 and half grains = 97 mg

1 grain                 = 65 mg

3/4 grain              = 49 mg

1/2 grain              = 32 mg

1/3 grain              = 21 mg

1/4 grain              = 16 mg

1/6 grain              = 11 mg

1/8 grain              = 8 mg

1/10 grain            = 6.5 mg

1/20 grain            = 3 mg

1/60 grain            = 1 mg

1/100 grain          = 0.6 mg

1/120 grain          = 0.5 mg

1/150 grain          = 0.4 mg

1/200 grain          = 0.3 mg

1/300 grain          = 0.2 mg

1/600 grain          = 0.1 mg

2.2 pounds           = 1 kilogram (kg)

 

IMPERIAL VOLUMES TO METRIC

12 minims                               = 0.7 millilitres (ml)

16 minims                               = 0.9 ml

32 minims                               = 1.9 ml

48 minims                               = 2.8 ml

1 fluid drachm                        = 3.6 ml

4 drachms or 1/2 fluid ounce = 14 ml

1 fluid ounce                           = 28 ml

3 and half fluid ounces           = 100 ml

10 and half fluid ounces         = 300 ml

21 fluid ounces                       = 600 ml

35 fluid ounces                       = 1 litre (l) or 1000 ml

40 fluid ounces                       = 1.1 lites

 

DOMESTIC MEASURES TO METRIC (APPROXIMATE)

1 teaspoonful             = 3.5 ml

1 dessertspoonful      = 7 ml

1 tablespoonful         = 14 ml

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