CC-OSMOMETRY

Yves Laure Pimentel · 70問 · 2年前

通報

問題一覧

The sample of choice for measuring blood osmolality is

SERUM

measurement of the OSMOLALITY

Osmometry

Measuring changes in COLLIGATIVE PROPERTIES OF SOLUTION (Osmotic pressure, boiling point, freezing point, and vapor pressure)

OSMOLALITY

– most commonly used method for measuring the changes in colligative properties in a solution.

FREEZING point depression osmometry

Osmometers: a. Reference solution:

NACL/ SODIUM CHLORIDE

Osmometers: Each osmole, freezing point is lowered by

1.86oC

is lowered by 0.3 mmHg or Torr

Vapor pressure

Vapor pressure is lowered by

0.3 mmHg or Torr

Boiling point is raised by

0.52oC

is raised by 0.52oC

Boiling point

, which is the difference between the measured osmolality and the calculated osmolality.

osmolal gap

indirectly indicates the presence of osmotically active substances

osmolal gap

= Measured osmolality – calculated osmolality= COMPUTED OSMOLALITY

Osmolal gap

is lowered by -1.86oC

freezing point

other names parasitology

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