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Chapter: Medicine Study Notes : Surgical and Fluid Management

Normal Values - Surgical and Fluid Management

Fluid Compartments in 70 Kg person: § Extracellular: 14 L § Intravascular: 3.5 L § Interstitial: 10.5 L § Intracellular: 28 L

Surgical and Fluid Management

Normal Values

 

Blood volumes

 

·       Infant          80-85 ml/kg

 ·     Young child 80 ml/kg

·       Adult 70 ml/kg

 

Child’s body weight

 

·        Under 9 years: kg = 2*age + 9


·        9 and over: kg = 3*age

 

Electrolyte concentrations



 Extracellular       Intracellular

·        Sodium    140     12

·        Potassium           4          155

·        Magnesium        1          28

·        Chloride  100     10

·        Bicarbonate       28       10

·        Phosphate          1          105

 

Fluid Compartments and Control

 

·        Fluid Compartments in 70 Kg person:

o   Extracellular: 14 L

§  Intravascular: 3.5 L

§  Interstitial: 10.5 L

o   Intracellular: 28 L


·        Female: 55% water, male 60 % water


·        Control through ECF osmolarity:

o   Thirst

o   ADH: controls H2O excretion

o   Renal Na excretion: renin-angiotensin-aldosterone system

 

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Medicine Study Notes : Surgical and Fluid Management : Normal Values - Surgical and Fluid Management |


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