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Unit 13
prep for exam 3
49
Nursing
Undergraduate 1
10/31/2009

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Term
2,400 to 2,700 mL/day of fluid intake
Definition
Average fluid intake for an adult per day
Term
2,300 - 2,600 mL/day
Definition
average fluid output for an adult per day
Term
Sodium
Definition
an electrolyte that is not normally stored by the body and must be consumed daily to maintain normal levels; functions largely in controlling and regulating water balance; found in many foods
Term
135 - 145 mEq/L
Definition
Normal serum sodium levels are...
Term
3.5 to 5.0 mEq/L
Definition
Normal serum Potassium levels are...
Term
Potassium
Definition
Electrolyte that is vital for skeletal, cardiac, and smooth muscle activity; maintaining acid-base balance; cont. to intracellular enzyme reactions
Term
Calcium
Definition
electrolyte that is vital in regulating muscle contraction and relaxation, neuromuscular function, and cardiac function; forming bones and teeth
Term
Hypokalemia
Definition
potassium deficit; serum potassium level < 3.5 mEq/L (R/T GI losses of potassium through vomiting and gastric suction)
Term
Hyperkalemia
Definition
potassium excess; serum potassium level > 5.0 mEq/L (can lead to cardiac arrest)
Term
hyponatremia
Definition
Sodium deficit; serum sodium level of less than 1.35 mEq/L; Common electrolyte imbalance (affects brain, nervous system affected by cellular edema; serum levels below 110 mEq/L can lead to permanent neuro. damage)
Term
Hypernatremia
Definition
excess sodium in ECF; serum sodium > 145 mEq/L; neurological manifestations
Term
hypocalcemia
Definition
calcium deficit; total serum calcium level < 8.5 mg/dL; tetany with muscle spasms and parasthesias; numbness & tingling around the mouth and hands and feet; convulsions
Term
hypercalcemia
Definition
total serum calcium levels > 105 mg/dL; most often occurs when calcium is mobilized from the bony skeleton...dude. :D
Term
hypomagnesemia
Definition
magnesium deficiency (serum magnesium < 1.5 mEq/L) - caused by chronic alcoholism; aggravates alcohol w/drawal (delirium tremens - DTs)
Term
hypermagnesemia
Definition
serum magnesium level > 2.5 mEq/L due to increased intake or decreased excretion; often a result of overzealous Magnesium therapy
Term
hypochloremia
Definition
decreased serum chloride level R/T excess losses of chloride ion through GI tract, kidneys, sweating; risk of alkolosis, muscle twitching, tremors, tetany
Term
hyperchloremia
Definition
associated w/ condition that causes sodium retention; serum chloride level > 108 mEq/L; Excess replacement of sodium chloride or potassium chloride are risk factors; manifestations include: acidosis, weakness, lethargy, w/risk of dysrhythmias & coma
Term
hypophosphatemia
Definition
serum phosphate level < 2.5 mg/dL (poss. causes: alcohol w/drawal, acid-base imbalances, use of antacids that bind w/phosphate in the GI tract); manifestations: paresthesias, muscle weakness & pain, mental changes, poss. seizures
Term
hyperphosphatemia
Definition
serum phosphate > 4.5 mg/dL; phosphate shifts out of cells into ECF due to tissue trauma or chemo for malig. tumors, renal failure, or when excess phosphate is admin. or ingested (i.e., infants who are fed cow's milk are @ risk; people on phosphate containing laxatives or enemas); numbness, tingling around mouth and in fingertips, muscle spasms, tetany
Term
Fluid volume deficit (FVD)
Definition
occurs when the body loses both water and electrolytes from the ECF in similar proportions, so decreasd volume of fluid remains isotonic. Often called hypovolemia.
Term
Fluid volume excess (FVE)
Definition
occurs when the body retains both water & sodium in similar proportions to normal ECF (hypervolemia)...always secondary to an increase in the total body sodium content, inc. in total body water (water & sodium are both retained so excess volume of fluid is isotonic)
Term
Isotonic
Definition
same osmolality as body fluids (0.9% NaCl)
Term
Hypertonic
Definition
higher osmolality than body fluids (3% NaCl)
Term
Hypotonic
Definition
lower osmolality than body fluids (.45% NaCl)
Term
1,500 - 2,000 mL per 24 hours
Definition
Normal urinary output for an adult over a 24 hour period
Term
40 - 80 mL per hour
Definition
Normal urinary output for an adult in an hour
Term
Anion
Definition
ions that carry a negative charge (inc. chlorine, bicarbonate, phosphate, and sulfate)
Term
cation
Definition
ions that carry a positive charge (inc. sodium, potassium, calcium, and magnesium)
Term
Colloidal Osmotic Presure
Definition
a pulling force exerted by colloids that help maintain the water content of blood
Term
dehydration
Definition
insufficient fluid in the body
Term
diaphoresis
Definition
intense sweating (abnormal)
Term
diuretic
Definition
agents that increase urine secretion
Term
diffusion
Definition
the mixing of molecules or ions of 2 or more substances as a result of random motion; molecules move from a solution of higher concentration to a solution of lower concentration
Term
electrolyte
Definition
chemical substances that develop an electric charge and are able to conduct an electric current when placed in water; ions
Term
extracellular fluid
Definition
fluid found outside the body cells
Term
filtration
Definition
process whereby fluid and solutes move together across a membrane from one compartment to another (area of higher pressure to area of lower pressure)
Term
hydrostatic pressure
Definition
the pressure a liquid exerts on the sides of a container that holds it; also called filtration force; the force exerted by blood against the vascular walls (e.g., the artery walls); Fluids move from the area of greater pressure to the area of lower pressure.
Term
Interstitial fluid
Definition
fluid that surrounds the cells, accounting for 75% of ECF, includes lymph
Term
Osmolality
Definition
the concentration of solutes in body fluids; determined by the total solute concentration w/in a fluid compartment; measured as "parts of solute/Kg of water"
Term
Osmosis
Definition
passage of a solvent through a semipermeable membrane from an area of lesser solute concentration to one of greater solute concentration; water moves towards the higher concentration of solute in an attempt to equalize the concentrations; this process is important for maintaining homeostasis & fluid balance
Term
Specific gravity
Definition
the weight or degree of concentration of a substance compared w/that of an equal volume of another, such as distilled water, taken as a standard
Term
Third Space Shifting (Third Space Fluid Shift)
Definition
fluid shifts from the vascular space into an area where it is not readily accessible as extracellular fluid
Term
Osmotic pressure
Definition
the power of a solution to draw water across a semipermeable membrane; when 2 solutions of diff. solute concentrations are separated by a semipermeable membrane, the solution of higher solute concentration exerts a higher__________ ___________, drawing water across the membrane to equalize the concentrations of the solutions (fluids move from lower to greater pressure)
Term
hypertonic, out, shrink
Definition
Fill in the blank: influsing a __________ IV solution (3% sodium chloride) will draw fluid ___ of RBCs, causing them to _____.
Term
hypotonic, swell, into
Definition
a ____________ solution through an IV will cause the RBCs to _______ as water is drawn _____ the cells by their higher osmotic pressure.
Term
Magnesium
Definition
electrolyte vital to intracellular metabolism, prod. & use of ATP, neuromuscular & cardiac function
Term
chloride
Definition
electrolyte found in gastric juice, reg. acid-base balance, buffer in exchange O2 & CO2 in RBCs
Term
phosphate
Definition
vital to chemical actions of the cell, essential for functioning of muscles, nerves, RBCs
Term
Bicarbonate (HCO3)
Definition
reg. acid-base balance as essential component of carbonic acid-bicarbonate buffering system
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