3.4.1 Osmolality and Osmolal Gap Flashcards

1
Q

Osmolality is measured clinically using an Osmometer

T or F

A

T

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2
Q

Osmolality is based on the measurement of a decrease in

a. Melting point
b. Freezing point
c. Vapor pressure
d. Condensation

A

b and c

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3
Q

When calculating osmolality, these are based on 3 osmotic particles,
namely:

S______(mmol/L),
G______ (mg/dl),
B_____(mg/dl).

A

Sodium
Glucose
BUN

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4
Q

Calculated Osmolality:

2Na(mmol/L) + (Glucose mg/dL / 18) + (BUN mg/dL / 2.8)

T or F

A

T

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5
Q

Effective screening method in Detecting the presence toxic compounds

a. Osmometry
b. Osmolal gap
c. Clark method

A

b

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6
Q

The difference of measured osmolality determined by an osmometer

a. Osmometry
b. Osmolal gap
c. Clark method

A

b

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7
Q

Osmolal gap = Measured osmolality - _________ osmolality

A

Calculated

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8
Q

Reference value :

Serum osmolality:

a. 275-297 mOsm/kg
b. 250-300 mOsm/kg
c. 5-10 mOsm/kg
d. 3-7 mOsm/kg

A

a

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9
Q

Reference value :

Osmolal gap

a. 275-297 mOsm/kg
b. 250-300 mOsm/kg
c. 5-10 mOsm/kg
d. 3-7 mOsm/kg

A

c

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10
Q

Clinical significance:

OG > ____ mOsm/kg

a. 10
b. 12
c. 11

A

b

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11
Q

OG > 12 mOsm/kg
Abnormal osmotic particles are present in plasma causes:

  • Renal failure
  • Diabetic insipidus
  • Lactic acidosis
  • Intoxication with alcohols

Which of the following does not belong?

A

Diabetic insipidus

Should be ketoacidosis

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12
Q

Common application: ethanol intoxication

a. These toxic compounds increase osmolal gaps
b. These toxic compounds Decrease osmolal gaps

A

a

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