NURS113 Lecture Notes - Lecture 10: Transcellular Fluid, Extracellular Fluid, Oncotic Pressure
19 Apr 2017
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67% of body fluid is intracellular: has protei(cid:374)s that (cid:272)a(cid:374)"t per(cid:373)eate (cid:373)e(cid:373)(cid:271)ra(cid:374)e, k+ Interstitial fluid (b/w cells) na: plasma, lymph, transcellular fluid (in body cavities ex: pericardial, csf, joints) Electrolytes (ions or compounds that dissociate, conductive) Na+ ecf = hypertonic, hyperosmolar ( op) Water moves b/w ecf and icf through osmosis. Water moves b/w plasma and interstitial fluid through diffusion and osmosis (net filtration) Hp op = net filtration rate (arterial +, venous -) Edema: hp, op, permeability, lymph obstruction (local edema), general edema. Inadequate intake due to coma, impaired thirst, Gain more water than salt: drink lots of water, siadh, hypervolemia. Lose more salt than water: sweating, brain cell swells. Hyperkalemia ( > 5. 0 mmol/l) depression, lethargy, stupor, coma: plasma volume decreases, hypovolemia. Deficit of ecf water, causing icf dehydration: water diarrhea, diabetes insipidus, water leaves cell. Analyze blood gas levels, blood electrolyte levels. Increased vomiting: faster than renal system compensation.
