Ch 40 Fluid Electrolyte And Acid Base Balance Flashcards
Acid
Substance containing a hydrogen ion can be liberated or released
Acidosis
Condition characterized by a proportional excess of hydrogen ions in the extracellular fluid, in which the pH falls below 7.35
Active transport
Movement of ions or molecules across the cell membranes, usually against the pressure gradient and with the expenditure of metabolic energy
Alkalosis
Condition, characterized by proportionate lack of hydrogen ions in the extra cellular fluid concentration in which the pH exceeds 7.45
Anions
Ion that carries a negative electric charge
Antibody
Immunoglobulin produced by the body in response to a specific antigen
Antigen
Foreign material capable of inducing a specific immune response
Autologous transfusion
Occurs when a patient donates one’s own blood for a transfusion
Base
Substance that can accept or trap a hydrogen ion
Blood typing
The laboratory examination to determine a persons blood type
Buffer
Substance that prevents body fluids from becoming overly acid or alkaline
Capillary filtration
Passage of fluid across the wall of the capillary results from the force of blood pushing against the walls of the capillary
Cation
Ion that carries a positive electric charge
Colloid osmotic pressure
Pressure exerted by plasma proteins on permeable membranes in the body; synonym for oncotic pressure
Pulls fluid into the capillaries and/or prevents fluid from leaving
Cross matching
Act of determining the compatibility of two blood specimens
Dehydration
Decreased water volume in body tissue
Diffusion
Tendency of salutes to move freely throughout a solvent from an area of higher concentration to an area of lower concentration and tall equilibrium is established
Edema
Accumulation of fluid and extra cellular spaces
Electrolytes
Substance capable of breaking into ions and developing an electric charge when dissolved in solution
Extra cellular fluid ECF
Fluid outside the cells; includes intravascular and interstitial fluids
1/3 of adult body fluid
Na, Ca, Ch, bicarbonate
Most important in homeostasis
Hydrostatic pressure
Force exerted by a fluid against the container wall
In capillaries increases filtration by pushing fluid and solute out of the capillaries
Hypercalcemia
Excessive calcium in the extra cellular fluid
Hyperchloremia
Excess of chloride and the extra cellular fluid
Hyperkalemia
Excess of potassium in the extra cellular fluid
Hypermagnesemia
Excess of magnesium in the extra cellular fluid
Hypernatremia
Excess of sodium in the extra cellular fluid
Hyperphosphatemia
Above normal serum concentration of inorganic phosphorus
Hypertonic
Have a greater concentration than the solution with which it is being compared
Greater concentration of particles than plasma
Hypervolemia
Excess of plasma
Both water and Na are retained
Hypocalcemia
Insufficient amount of calcium in the extra cellular fluid
Hypochloremia
Insufficient amount of chloride in the extra cellular fluid
Hypokalemia
Insufficient amount of potassium in the extra cellular fluid
Hypomagnesemia
Insufficient amount of magnesium in the extra cellular fluid
Hyponatremia
Insufficient amount of sodium in the extra cellular fluid
Hypophosphatemia
Below normal serum concentration of inorganic phosphorus
Hypotonic
Having a lesser concentration in a solution with which is being compared
Lesser concentration of particles than plasma
Hypovolemia
Deficiency of blood plasma
Intracellular fluid ICF
Fluid within the cell; synonym for cellular fluid 2/3 of adult body fluid Cations: K, Mg Anions: Phosphorus High in K and Mg Low in Na and Ch
Ion
Atom or molecule carrying an electric charge in solution
Isotonic
Having about the same concentration as a solution with which it is being compared
Same concentration of particles as plasma
Osmolarity
Concentration of particles in a solution, Or a solutions pulling power
Concentration of solutes in body fluid
Na is the greatest determinant
Osmosis
Passage of a solvent through a semi permeable membrane from an area of lesser concentration to an area of greater concentration until equilibrium is established
pH
Expression of hydrogen ion concentration and resulting acidity of a substance
Solutes
Substance dissolved in a solution
Solvent
Liquid holding a substance in solution
Normal sodium
135-145 mEg/L
Regulates water balance
Controls and regulates volume of body fluids
Major electrolyte in ECF. Essential for acid-base, fluid balance, active and passive transport, irritability and conduction of nerve muscle tissue
Normal potassium
3.5-5.0 mEq/L
Major cation in ICF
Plays vital role in cell metabolism and transition of nerve impulses, the functioning of cardiac, lung, muscle tissues and acid-base balance
K imbalance can cause cardiac dysrhythmia that can be life threatening
Normal Ch
95-105 mEq/L Major anion of ECF Major component of gastric juice Regulates acid-base balance Acts as buffer in O2 and CO2 exchange Maintain osmotic pressure in blood, produces hydrochloric acid
Normal Ca
8.5-10.5 mEq/L
Found in cells, bone, teeth. Needed for proper functioning of the cardiovascular, neuromuscular, endocrine systems, blood clotting and teeth formation
Normal phosphate
2.5-4.5 mg/dl
Major anion of ICF
Found in ECF, bone, skeletal muscle and nerve tissue
Children have higher levels than adults
Metabolize protein, fats and carbohydrates
Involved in important chemical reactions in the body, cell division and hereditary traits
Normal Mg
1.5-2.5 mEq/L Intracellular metabolism In skeleton and ICF Found in bones. Regulates BP, blood sugar, muscle contractions and nerve function Mg is a sedative Mg and Ca rise and fall together
Bicarbonate
In ICF and ECF
Regulates acid-base balance
Body’s primary buffer system
Oncotic pressure
Pulling water from interstitial space into the vascular compartment
ABG’s
Average water content of the human body
55% Male 60% Female 50% 3/4 of total body mass 50% elderly 80% baby
What average is based on
Average adult white male who weighs 70kg
Ratio of ICF to ECF
2:1
Interstitial fluid ISF
ECF
Conduit between capillaries and cells
Transport nutrients and waste
Hydrostatic pressure pushing out of capillaries
Osmotic pressure pushing into capillaries
Body temperature
Acid base balance
Blood serum
Plasma without clotting factors
Used in numerous diagnostic tests and blood typing
Over Hydration
More water is gained or retained than electrolytes
Function of water in body
Regulates and maintains body temperature
Insulator and shock absorber
Lubricant joints
Carry oxygen and nutrients to cells
Supports Removel of toxins and wastes from organs
Needed for normal cell function
Albumin
The main protein of plasma and it regulates oncotic pressure in the blood by binding to water and electrolytes
How much sodium should be consumed
Less than 2,300 mg per day
How long does it take for thirst to be quenched
30 minutes to 1 hour
Indescribable water loss
Can’t be perceived , can’t be measured
Sensible water loss
Can be perceived and measured
What is the desirable total intake and output for an adult in a 24 hr period
1,500-3,500 ml
Diminish absorption of phosphate
Calcium
What is the significance of the adrenal glands on fluid and electrolyte
Help body conserve Na, save chloride and water, excrete K
How edema develops
Hydrostatic pressure forces fluids and solutes out of the capillaries and into interstitial space.
Nursing intervention for temperature of 102F (fluids and electrolytes balance)
Increase the 24 hour fluid intake by 500ml
First sign of decreased vascular volume associated with fluid volume deficit
Tachycardia
How are orthostatic blood pressure performed, and why
Any time a fluid and electrolyte imbalance is suspected
- Lay down for 5 minutes, take BP and HR
- Stand up for 1 minute, take BP and HR
- Stay standing for 3 more minutes, take BP and HR
If there is a 10 point down change for diastolic or 20 point down charge for systolic they have a fluid volume deficit
Assessment finding dehydrated infant
Sunken fontanel
Lack of tears
High blood, urea, nitrogen (BUN)
Kidney failure
Dehydration
Why do infants lose more fluid through the kidneys
Lower glomerular filtration rate