Osmolality کا حساب کیسے لگائیں
Osmolality کیا ہے؟
Osmolality measures solute concentration in body fluids. It's critical for diagnosing hyponatremia, hypernatremia, and fluid disorders.
فارمولا
Calculate: Osm = 2[Na] + (Glu/18) + (BUN/2.8)
- Na
- Na value — Variable used in the calculation
- BUN
- BUN value — Variable used in the calculation
مرحلہ وار گائیڈ
- 1Calculate: Osm = 2[Na] + (Glu/18) + (BUN/2.8)
- 2Normal: 280-310 mOsm/kg
- 3Compare measured to calculated osmolality
حل شدہ مثالیں
ان پٹ
Na 128, glucose 200, BUN 28
نتیجہ
Osm ≈ 318 (high), measured lower suggests hyponatremia
Pseudohyponatremia likely
عام غلطیاں جن سے بچنا ہے
- ✕Neglecting glucose and BUN contributions in hyperglycemia/uremia
- ✕Confusing osmolality with osmolarity (different in concentrated solutions)
اکثر پوچھے جانے والے سوالات
What's the osmolal gap?
Difference between measured and calculated osmolality. Large gap suggests unmeasured osmoles (ethanol, methanol, etc.).
How does osmolality relate to sodium?
Sodium is the main determinant of osmolality; hyponatremia usually means hypoosmolality and vice versa.
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