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MedSurg6
Med Surg Chapter 6
Question | Answer |
---|---|
Fluid balance is controlled by | kidneys |
If the fluid pressure is high such as in CHF or fluid overload | less ADH is released |
If fluid pressure is down | more ADH is released |
Active transport | Fuel is needed ATP (adenosine triphosphate), Example: sodium and potassium pump.They need ATP to move |
Passive transport | No energy is required. Diffusion, Filtration, Osmosis |
Diffusion | movement from an area of higher concentration to an area of lower concentration |
Filtration | the movement of small molecules and water through an area that is semipermeable |
Osmosis | movement of water from an area of low concentration to an area of high concentration |
Three types of tonicity | isotonic, hypertonic, and hypotonic |
Tonicity is based on: | blood |
isotonic | same osmolality as blood |
hypertonic | higher or greater osmolality |
hypotonic | lower osmolality |
another word for dehydration | hypovolemia |
sensible loss examples | urinating |
insensible loss examples | sweating and breathing |
Adults lose how much fluid in 24 hours? | 2,500 ml |
People at risk for dehydration | children, older adults, infants |
Adults need how much fluid a day? | 30 ml/kg |
Signs of dehydration | • Thirst • Rapid, weak pulse • Low BP • Dry Skin and mucous membranes • Skin tenting • Decreased urine output (less than 30 ml/hr) • Increased temperature |
During dehydration how is the creatinine and BUN? | Elevated |
Signs of Fluid Excess | • Bounding pulse • Elevated BP • Respiratory changes (crackles, labored breathing, shallow) • Edema • Increased urine output • Weight gain • Heart failure (posterior lower lobes first) |