LABORATORY_ELECTROLYTES

Question 1

MOST ABUNDANT CATION IN EXTRACELLULAR FLUID

Answer 1

SODIUM

Question 2

SPECIMEN FOR SODIUM:

Answer 2

SERUM
PLASMA (lithium, ammonium heparin & lithium oxalate)
SWEAT
24 HR URINE

Question 3

METHODS : SODIUM

Answer 3

FLAME EMISSION SPECTROPHOTOMETRY
ION SELECTIVE ELECTRODE
ATOMIC ABSORPTION SPECTROPHOTOMETRY

Question 4

2 TYPES OF ISE in SODIUM TEST:

Answer 4

DIRECT - provides undiluted sample
INDIRECT - used diluted sample

Question 4

Sources of ERROR in ION SELECTIVE ELECTRODE METHOD for SODIUM TEST?

Answer 4

PROTEIN BUILDUP

Question 4

MOST ROUTINELY USED method in SODIUM TESTING:

Answer 4

ION SELECTIVE METHOD

Question 5

Sample volume for SODIUM?

Answer 5

10 uL

Question 5

INCUBATION TIME FOR SODIUM?

Answer 5

5 MINUTES

Question 6

TEMP FOR SODIUM TEST?

Answer 6

30 C

Question 6

REFERENCE RANGE OF SODIUM:

Answer 6

SERUM: 135-145 mmol/L
URINE (24hr) : 40-220 mmol/d
CEREBROSPINAL FLUID : 135-150 mmol/L

Question 7

It is the MAJOR INTRACELLULAR CATION in the body

Answer 7

POTASSIUM