Skip to main content

Osmolality Nasıl Hesaplanır?

learn.whatIsHeading

Osmolality measures solute concentration in body fluids. It's critical for diagnosing hyponatremia, hypernatremia, and fluid disorders.

Formül

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

Adım Adım Kılavuz

  1. 1Calculate: Osm = 2[Na] + (Glu/18) + (BUN/2.8)
  2. 2Normal: 280-310 mOsm/kg
  3. 3Compare measured to calculated osmolality

Çözümlü Örnekler

Giriş
Na 128, glucose 200, BUN 28
Sonuç
Osm ≈ 318 (high), measured lower suggests hyponatremia
Pseudohyponatremia likely

Kaçınılması Gereken Yaygın Hatalar

  • Neglecting glucose and BUN contributions in hyperglycemia/uremia
  • Confusing osmolality with osmolarity (different in concentrated solutions)

Sık sorulan sorular

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.

Hesaplamaya hazır mısınız? Ücretsiz Osmolality Hesaplayıcıyı deneyin

Kendiniz deneyin →

Ayarlar

GizlilikKoşullarHakkında© 2026 PrimeCalcPro