units used in medical laboratory technology

1. PRESENTED BY:
HUSNA

2. TABLE OF CONTENT:
TOPIC: UNITS OF MEASUREMENTS
• SI units
• Types of units
• Use of prefixes
• Standardized reporting of laboratory
results
• Clinical enzymology

3. • With increase in trade and communication,
Necessity for a global unified system of
measurement was needed.
• In 1863, French meter system based on meter,
gram & second was introduced.
• The system was revised in 1873, and base unit for
measuring length was changed to centimeters
called as CGS System.
• This system didn’t solved problems so a final
version of now accepted system called SYSTEM
INTERNATIONAL UNITS was introduced,
INTRODUCTION

4. Its defined as a scientific method of expressing the magnitudes
or quantities of important natural phenomena.
IMPORTANCE:
 It is accepted all over the world and has made the research
easier.
 It overcomes language barrier.
 Comparison of laboratory data from different laboratories all
over the world could be done easily and quickly.
 It is a rational system of unit. For example, joule is used for
all types of energies.
SYSTEM INTERNATIONAL UNITS (SI):

5. TYPES OF SI UNITS:
SI units are divided into three types.
 BASE UNITS
 DERIVED UNITS
 SUPPLEMENTARY UNITS

6. BASE UNITS:
There are seven
fundamental
physical quantities
that form the basis
of other quantities
these are called
base units.

7. Derived unit
It is obtained from
the manipulation of
one or more base
units.
Example
• Unit of volume is “
cubic meter”
• Its derived by
cubing the base
unit meter.

9. SUPPLEMENTARY UNITS:
These are the units about which it is still not
decided whether it is base unit or derived
unit.
EXAMPLES:
 Radian
 Steradian

10. PREFIXES:
Prefixes are used to express very
large or small numbers.
EXAMPLE:
1000km
55cm
78nm
RBCs volume is in liters.

12. CONVERSION:
Conversion factor;
is a number used to change one set of units to another, by
multiplying or dividing.
For example,
to convert inches to feet, the appropriate conversion value is 12
inches equal 1 foot

13. RULES OF CONVERSION:
• Kilogram is written as kg not kgs
• Full stop is not used after the symbol
• Decimal shall be written with coma or dot.
• A raised dot in SI Units shows multiplication.
EXAMPLE:
3 decimal 5
Its written as 3.5 not 3`5 because it means
multiplication.

14. It involves the use of recognized symbols,
abbreviations and internationally accepted
format of reports.
• Its understood all over the world. Slide 15
• provides unit that is easily adapted to
laboratory changes in methodology without
necessitating a change in the numerical
reporting system
STANDARIZED REPORTING OF LABORATORY RESULTS:

16. 1. 2Mobitz type-2
Clinical enzymology
f
It is the study of activity and properties of enzymes in specimens
(usually of blood) taken from patients, as an aid to the diagnosis and
treatment of disease.
UNITS OF ENZYME ACTIVITY
• ONE INTERNATIONAL UNIT
Amount of enzyme that will convert one micromole of substrate per
minute per liter of sample and is abbreviated as U/L (units/liters)
• KATAL (CATALYTIC ACTIVITY)
Is defined as number of mole of substrate transformed per second per
liter of sample.

17. REFERENCE:
https://www.google.com/search?q=table+of+derived+units&tbm=i
sch&ved=2ahUKEwjo9YXbiIf0AhUR4oUKHfhjCUIQ2-
cCegQIABAA&oq=table++of+derived&gs_lcp=C
https://en.wikipedia.org/wiki/International_System_of_Units
https://www.slideserve.com/cdanielle/units-and-measurement-
powerpoint-ppt-
presentation/?utm_source=slideserve&utm_medium=website&ut
m_campaign=auto+related+load
https://www.labnetinternational.com/products
https://www.sciencedirect.com/topics/biochemistry-genetics-and-
molecular-biology/enzymology
Roberts, W.M.: Brit. J. Exp. Path. 11, 90 (1930)

18. THANK YOU