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Med/Surg exam 2
Fluid and Electrolytes, ABG's
138
Nursing
Undergraduate 4
05/19/2012

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Term
Cellular metabolism
Definition
Results in acid production. They body must neutralize the acid before its entry into the serum or hide/excrete the ingredients, or make more compensating substances
Term
You can always make more compensatory substances
Definition
More HCO3 will be retained by the kidney, more CO2 will be retained by the lung, More H+ ion will hide or be saved by the kidney
Term
Big and baby buffers
Definition
Chemical buffer systems, protein buffer system, chloride shift, cellular buffers, respiratory buffer system, renal buffer system
Term
Baby buffers
Definition
Metabolic processes that neutralize the acid in the serum. Chemical, PO4 and HCO3, Proteins- Cl- shift on and off Hgb in exchange for HCO3. Cellular moves H+ into different spaces.
Term
Respiratory buffering system
Definition
Responds quickly (10-30 minutes) easy to assess physical effect. Sensitive to minute changes in the acid base balance dance of life. Controlled by the same systems that control respirations. Loss of this buffering system requires compensation to be made by baby buffers and the renal buffering system.
Term
Respiratory buffer system enemies
Definition
Any disease that interferes with the controllers or the organ of gas exchange.
Primary diseases of the lung (chronic) COPD, Pneumonia. (Acute) Respiratory failure, Pulmonary Edema or Embolus. Neuromuscular Diseases, Electrolyte Distubrances.
Term
Renal Buffering System
Definition
Kick in 12 hours to 2-3 days, works on several different levels. Retention/Excretion of hydrogen or bicarbonate. Retention/Excretion of Phosphate/Phosphoric Acid. Rention/Excretion of Ammonium/ Ammonia. Loss of function requires compensation to be made by the baby buffer systems and acutely by the respiratory buffer system.
Term
Renal Buffer Eliminators
Definition
Any disease or substance that is known to destroy, eliminate, or negatively affect the excretory role of the kidney. Diabetes, hypertention, kidney disease, nephrotoxic drugs, congenital renal disease.
Term
Compesation
Definition
Compensation by the respiratory or the renal system is achieved when the ph Remains or returns within the normal range.
Term
Only true way to measure Hypoxemia
Definition
PaO2 is the only true way to measure hypoxemia
Term
Blood Gas Parameters for pH
Definition
7.35-7.45
Term
Blood Gas Parameters for PCO2
Definition
34-45
Term
Blood Gas Parameters for HCO3
Definition
22-26
Term
Blood Gas Parameters for PO2
Definition
80-100 at sea level
65-75 Mile High
Term
Blood Gas Parameters for O2
Definition
95-100 Seal Level
90 and higher Mile High
Term
Blood Gas Parameters B.E.
Definition
-2 to 2+
Term
ABG interpretation
Definition
Look at the pH result
1st name compensated- ph within normal range or uncompensated- ph outside of normal range
Last name acidosis- pH below 7.4
alkalosis- ph above 7.4

Middle name- Look at the parameter that relates to the pH disturbance
If the PCO2 is consistent with the pH problem the middle name or etiligy is respiratory. If the HCO3 is consistent with the pH problem the middle name or etiology is metabolic.
Term
ROME
Definition
Respiratory
Opposite
The pH and CO2 are inversely related

Metabolic
Equal
The pH and HCO3 move in the same direction
Term
K+ with acidosis
Definition
The K+ will be high with acidosis, cardiac monitor with high K+ level- may see EKG peaked T wave
Term
Respiratory Acidosis
Definition
Caused by any disease/ condition that inhibits ventilation-- Gas exchange from occuring that results in hypoventilation. Results in retnetion of CO2.
Increased PaCO2 and Decreased pH
Term
Respiratory Alkalosis
Definition
Caused by any disease or situation that results in hyperventilation. Excessive CO2 is blown out of the lungs during exipriation. decreased PaCO2 increased pH
Term
Metabolic Acidosis
Definition
Caused by any situation or disease that inhibits synthesis or causes excessive excretion or bicarbonate in the urine or any condtion that increases the amounts of acids in the body. Depleted bicarbonate HCO3.
Decreased HCO3 Decreased pH
Term
Metabolic Alkalosis
Definition
Caused by any Metabolic condition or situation that decreases the amount of acids or promotes excessive synthesis or bicarbonate ions by the kidney. Results in an excess of HCO3. Increased HCO3 and pH
Term
Signs ans symptoms of acidemia
Definition
CNS- lethargy, confusion, stupor, coma
Cardiac- Delayed conduction, wide QRS, Tall T waves, Bradycardia
Neuromuscular- Hyporflexia, Hypotention, skeletal muscle weakness, faccid paralysis
Respiratory- compensation, would see hyperpnea, tahypnea
Integumentary- Metabolic-warm, flushed, dry, Perspiratory pale to cyanotic, skin dry
Term
Signs and symptoms of alkalemia
Definition
CNS- anxiety, irritability, seizures
Neuromuscular- hyperreflexia, muslce cramping, and twiching parasthesias
Cardiac- increased heart rate, irritability
Respiratory- metabolic cause decreased respiratory effort
Respiratory cause increased rate and depth of respirations
Term
Mixed Imbalances
Definition
Tow or more primary imbalances may coexist in the smae very messed up patient. Metabolic acidosis and metabolic alkalosis. Seein with a patient with DKA who is vomiting.
Metabolic acidosis and respiratory acidosis- seen in a patient with acute pulmonary edema and cardiogenic shock
Term
Treatment
Definition
Treat the cause, protect cardiac muscle form electrolyte K+ imbalances
Term
Nursing Implications
Definition
Watch for signs of clinical improvement, evaluate mental status provide a safe environment, cardiac monitor, due to hypoventilation, evaluate drug therapy, monitor and evaluate electrolytes, ABG's
Term
Homeostasis
Definition
Equillibrium of the internal environment, the body will maintin through biofeedback systems. A balance between teh ion and cation.
Term
Water content of the body
Definition
50-60% body weigh in adult
45-55% older adult
70-80% in infants
Term
Body compartments maintain homeostasis
Definition
Fluid compartments
Intracellular- all fluid within a cell, most body fluids live here.
Extracellular- fluids located between the cells or thir spacing. Intravasular (plasma), transcellular (CSF, peritoneal fluid, synovila fluid)
Term
Movement of fluids within compartments
Definition
The magic of the semi-permeable membrane- the cell membrane is picky water and Oxygen can move freely.
Diffusion- Spreading molecules from an area of higher concentration to an area of lower concentration.
Osmosis- across a concentration gradient- usually lower to higher moving water.
Term
Hypovolemia
Definition
ECF volum deficit, abnormal loss of normal body fluids
Diarrhea, vomiting, nasogastric tube drainage, fistula drainage, hemorrhage, inadequate intake, NPO, shift plasma to interstitial (third spacing, burns, peritonitis, bowel obstructions, ascites)
Term
Clincial Manifestations of Hypovolemia
Definition
Hemoglovin and Hematocrit elevation, ECH deficit hemoconcentration, increased Protein, BUNG, glucose, and electrolytes. Urine specific Gravity due to concentrated urine, serum sodium elevated, Nurses Report Findings.
Term
Physical assessment of Hypovolemia
Definition
Physical Assessment, Vital signs (weak, tachycardia pulse, hypotensive (othostatic), hyperthermia. Neurological- dizzy, confused, weakness, and fatigue.
GI- thirst, dry oral mucosa, N/V, anorexia, and weiht loss.
Renal- Oliguria Low to zero urine output
Other- cool clammy skin, sunken eyes and flattened neck veins.
Term
Nursing Interventions for Hypovolemia
Definition
Fluid replacement- LR or 0/9%NS
Monitor I/O
Call for ouptut less than 0.5mL/kg/hour for 2 consecutive hours
Monitor VS
Watch LOC and maintain safety with position changes
Treat the cause of fluid volume deficit
Term
Hypervolemia
Definition
#1 cause of HF
ECF volume excess, excessive intake of fluids, abnormal retention of fluids (HF), interstital to plasma fluid shift
Term
Clinical findings of Hypervolemia
Definition
VS- Tachycardia, bounding pulse, hypertension, tachypnea, JVD
Hgb and Hct, serum proteine- decreased due to hemodilution, low SG urine
Respiratory- Dyspnea, crackles and orthopnea
Neurological- Confusion, muscle weakness
GI- Anorexia, weight gain, ascites
Edema
Term
Edema
Definition
Acculuation of fluid around organ and tissues
The fluid is in the extracellular or interstitial compartments
Lungs- pulmonary edema
Abdomen- ascites
Extremities- peripheral edema
The skin becomes so taunts it will be shiny
Pitting edema VS non-pitting
Term
Causes of Edema
Definition
Vascular insufficiency, prengnacy retention of water and sodium, Heart Failure- pump failure, Renal failure- removal of all fluids, cirrhosis- elevated pressure within the vessels of the liver
Anasarca- excessive acculumation of fluid in the interstitial spaces throughout the body, causes cardiac, renal or liver failure.
Term
Collaborative care
Definition
Reduce IV fluids, Monitor ABG for hypoxemia and respiratory alkalosis, position patient high fowlers, O2 as indicated, diruetics monitor I/O, and daily weight, sodium 2-4g/24 hours, document edema, measure PRN and elevate dependent edema areas, skin assessment
Term
Electrolytes
Definition
Substances whose moledcules dissociate into ions(charged particles) when placed into water, International standard is millimosles per liter, U.S. uses milliequivalent,
ICF prevalent cation is K+
Prevalent anion is PO34
ECF prevalent cation is Na+
Prevalent anion is Cl-
Term
The homeostasis of electrolytes
Definition
Lytes regulate fluid balances, hormone production, strengthens skeletal structures, acts as a catalysts in nerve response and muscle contraction.
Sodium is the primary electrolyte
Electrolytes are calculated from a blood draw or plasma.
We never really know what lytes are doing at the cellular level
Common in most patients with major illness or injury.
Term
Hyponatremia Serum Sodium Less than 135mEq/L
Definition
Risk factors, GI- vomitting, nasogastric suction, diarhea, and tap water enema. Hypovolemi
Physical exertion
Renal- diuretics, adrenal insufficiency, and kidney disease
Burns, wound drainage
edematous state, fluid volume excess
hypotonic IV fluids
Term
Clincial manifestations of Hyponatremia
Definition
VS- tachycardia, hypotention (orthostatic)
Neurological-Muscle weakness, confusion, headache, lethargy, muscle cramps, seizures can occur
GI- hyperactive bowel sounds, abdomincal cramping
Term
Hyponatremia Collaborative care
Definition
Oral fluid restriction usually 1000ml per 24 hours. No water
Isotonic or hypertonic IV solusions
Increase sodium intake in diet
seizure precautions- padded side rails if seizure occurs
Safety with confusion (Bed low, brakes locked, call light in reach.)
Term
Hypernatremia- Serum sodium greater than 145mEq/L
Definition
Risk factors, water deprivation NPO, excessive sodium intake- oral and IV solution, sodium retention, renal failure, cushings syndrome, steroids, fluid loss- fever, burns, respiratory infection, hyperglycemia
Term
Clinical Findings Hypernatremia
Definition
VS- Tachycardia, hyperthemia, orthostatic hypotension
Neruo/musculoskeletal- Restlessness, agitation, muscle twitching, increased DTR, altered LOC
GI- dry mucous membranes, hyperactive bowel sounds, abdominal cramping
Edema, and oliguria
Term
Nursing interventions and Medical management for Hypernatremia
Definition
Administer hypotonic solutions or isoltonic solutions, encourage water intake, monitor LOC and patient safety, oral hygeine to decrease thirs, I/O and daily weights, cellular dehydration can also cause seizures.
Term
Hypokalemia serum potassium less than 3.5mEq/L
Definition
Actual potassium deficits
Gi-vomitting, nasogastric suction, hiarrhea and excessive laxative us
Renal- Diuretics
Skin- diaphoresis
Relative Potassium Deficits- alkalosis, tPN, water intoxification
Term
Clinical Manifestations of Hypokalemia
Definition
Metabolic alkalosis
VS- weak irregular pulse, hyperthermia
Cardiac- ECG changes, Inverted T waves, bradycardia, ST depression, premature ventricular contractions, ventricular tachycardia
Neuromuscular- Weakness!! Muscle cramping, confusion, hypoactive reflexes- respiratory status
GI- decreased motility, hypoactive bowel sounds, constipation, ileus, N/V anorexia
Term
Collaborative care for hypokalemia
Definition
Treat the underlying cause, replacement of potassium, oral and IV potassium, food high in potassium, NEVERN IV PUSH K+, safe IV dose maximum 10mEq/hour
Postassium protocols
Monitor IV for phlebitis
Monitor Respirations and cardiac rhythm
Consider LOC and safety
Term
Nursing Diagnosis for Hypokalemia
Definition
Risk for electrolyte imbalance
Risk for injury
Potential complication: Dysrhythmias
Term
Hyperkalemia Serum potassium greater than 5.0mEq/L Risk factors
Definition
Actual potassium Excesses- increased intake of potassium- IV or salt substitutes
Renal failure- Not excreting
Potassium sparing diuretics- Thiazides (spironolactone)
Relative Potassium Excesses
Tissue damage, trauma
Uncontrolled diabetes
acidosis
Addison's disease
Term
Clinical Manifestations of Hyperkalemia
Definition
Metabolic acidosis
Vits Signs- slow irregular pulse, hypotension
Neuromuscular- resltessness, irritability, weakness, paresthesias
ECG changes- ventricular fibrilation Peaked T wave
GI- N/V, increases GI motility, diarrhea
Term
Collaborative care for hyperkalemia
Definition
Stop potassium intake, stop IV or oral doses of potassium. Increase potassium excretion (loop diuretics, kayexalate-sodium polystrene sulfonate PO or enema)
dialysis
Force K from ECF to ICF by Iv insulin of sodium bicarbonate
Cardiac monitoring- cardiac arrest, and monitor for dysrhythmias
Term
Nursing Diagnosis for Hypo or hyperkalemia
Definition
Risk for electrolyte imbalance
Risk for injury
Potential complication: Dysrhythmia
Term
Hypocalcemia- Serum Calcium less than 9.0mg/dl
Definition
Malabsoption of calcium from Crohn's
End stage renal disease
Post thyroidectomy
Decreased production of PTH, acute pancreatitis, multiple blood transfusions
Term
Clincial Findings Hypocalcemia
Definition
Neuromuscular- muscles twitchy even at rest, hyperactive deep tendon reflexes, postivit chovstek's sign, positive Trousseaus's sign
Cardiovascular- Decrease myocardial contractility and decreased HR
ECG changes
Term
Collaborative Care for Hypocalcemia
Definition
Calcium replacement therapy oral or IV
Seizure precautions
Emergency resuscitations equipment
Encourage foods high in calcium
Treat pain and anxiety to prevent hyperventilation-induced respiratory alkalosis
Term
Hypercalcemia
Definition
High serum calicum levels caused by hyperparathyroidism, malignancy, vitamin D overdose, prolonged immobilization
Term
Hypercalcemia Manifestations
Definition
decreased memory, confusion, disorientation, fatigue, constipation
Term
Hypocalcemia- Low serum levels caused by
Definition
Decreased production of PTH, acute pancreatitis, multiple blood transfusions, alkalosis, decreased intake
Term
Nursing management of hypercalcemia/hypcalcemia
Definition
Exretion of Ca with loop diuretic, hydration with isotonic saline infusion, synthetic calcitonin, mobilization
Term
Hyperphosphatemia
Definition
High serum PO34 caused by acute or chronic renal failure, chemotherapy, excessive ingestion of phosphate or vitamin D.
Manifestations-
Calcified deposition in soft tissue such as joints, arteries, skin, kidneys, and corneas.
Neuromuscular irritability and tetany
Term
Hyperphosphatemia Management
Definition
identify and treat underlying cause, restric foods and fluids containing phophorus, adquate hydration and correction of hypocalcemic conditions.
Manifestations
CNS depression, confusion, muscle weakness and pain, dysrhythmias, cardiomyopathy
Term
Hypophsphatemia
Definition
Low Serum PO34 caused by malnourishment/ malabsoprtion, alcohol withdrawal, use of phophate-binding anatcids, during parenteral nutrition with inadequate replacement
Term
Management of hypophosphatemia
Definition
Oral supplementation, ingestion of foods high in phosphorus, IV administation of sodium or potassium phosphate
Term
Hypomagnesium Serum Magnesious less than 1.2mg/dl
Definition
Malnutrition, alcoholism, prolonged use of TPN, uncontrolled diabetes with fluid loos
Term
Clinical Findings Hypomagnesmia
Definition
Neuromuscular
Increased nerve impulse transmission, hyperactive DTR, facial paresthesias, muscle tetany, confusion
Hyperactive DTR, tremors, siezures
GI
Hyperactive bowel sounds, constipation, ileus
Term
Nursing Interventions and Medical Management for hypomagnesmia
Definition
Stop medications which lead to magnesium loss (loop diuretics)
IV and oral magnesium replacement
Encourage food high in magnesium
Term
Hypermagnesemia
Definition
Caused by increased intake or ingestion of products containing magnesium when renal insufficiency or failure is present.

Manifestations are:
Lethargy
Drowsiness
Nausea/Vomitting
Impaired reflexes
Somnolence
Respiratory and cardiac arrest
Term
Management of Hypermangnesemia
Definition
Prevention
Emergency treatment- IV calcium gluconate
Fluids to promote urinary exretion
Term
Sodium Levels
Definition
134-145
Term
Potassium Levels
Definition
3.5-4.5
Term
pH Levels
Definition
7.35-7.45
Term
CO2 levels
Definition
35-45
Term
Magnesium Levels
Definition
1.5-3.5
Term
Bicarb Levels
Definition
22-26
Term
Hemoglobin Levels for women
Definition
12-16
Term
Hemoglovin Levels for Men
Definition
14-18
Term
Calcium Levels
Definition
10
Term
BUN levels
Definition
10
Term
Normal ICP
Definition
10
Term
Normal CVP
Definition
10
Term
Purposes of IV solution
Definition
Fluid maintainence
Replacement
Correction of fluid/electrolyte imbalance
Medication administration
Term
Isotonic Fluid types
Definition
LR (274mOsm)
.9NS (309mOsm)
D5W (278mOsm)
Term
Hypotonic fluid types
Definition
.45NS (154mOsm)
.33NS (103mOsm)
Term
Hypertonic Fluid types
Definition
D5 1/2 NS (406mOsm)
D5LR (524 mOsm)
3%NS (1026 mOsm)
Term
Sodium electrolyte disorders and symptoms
Definition
Excess- hypernatremia- thirst, CNS deterioration, increased interstitial fluid.

Deficit- hyponatremia- CNS deterioration
Term
Potassium electrolyte disorders and symptoms
Definition
Hyperkalemia- ventricular fibrillation, ECG changes, CNS changes

Hypokalemia- Bradycardia, ECG changes, CNS changes
Term
Calcium electrolyte disorders and symptoms
Definition
Hypercalcemia- thirst, CNS deterioration, incresed interstitial fluid.

Hypocalcemia- Tetany, Chvostek's sign, Trousseas sign, muscle twitching, CNS changes, ECG changes
Term
Magnesium electrolyte disorders signs and symptoms
Definition
Hypermagnesiemia- Loss of DTR, depression of CNS, depressioun of nerumuscular function

Hypomagnesemia- Hypoactive DTR, CNS changes
Term
One function of body fluids
Definition
To provide nutrients to cells and carry waste away from cells
Term
Body fluids transport nutrients to and waste productrs from the cells, and they are also necessary fo that
Definition
electrolyte chemical reactions can occur.
Term
The largest amount of body fluids is whithin the cells which is call the
Definition
intracellular compartment
Term
Extracellular fluid is divided into the following two parts
Definition
intravascular and interstitial
Term
An example of sensible fluid loss if fluid excreted through the
Definition
kidneys
Term
Daily fluid loss known as
Definition
insensible in not measurable
Term
The electron of an atom carries a
Definition
negtive charge
Term
An atom that has an electrical charge is called an
Definition
ion
Term
A cation is an ion with a
Definition
positive electrical charge
Term
Anions carry a
Definition
negative electrical charge
Term
A milliliter is what fraction of a liter
Definition
1/1000
Term
Active transport
Definition
the method in which the body moves electrolytes from an area of lesser concentration to an area of greater concentration
Term
ATP
Definition
Is the energy source of active transport
Term
The major cation in both interstitial and intravascular fluid
Definition
Sodium
Term
The chief cation in the intracellular fluid is
Definition
Potassium
Term
A substance that is dissolved is called
Definition
solute
Term
The solution in which a solute is dissolved is called
Definition
Solvent
Term
When a carrier substance is needed to transport another substance across a membrane the process is called
Definition
facilitated diffusion
Term
The movment of fluid through a selectively permeable membrane is called
Definition
osmosis
Term
The result of osmosis is two solutions, separated by a membrane that are
Definition
equal in concentration.
Term
Isotonic
Definition
When the solutions on both sides of a selectively permeable membrane are alike in concentration.
Term
An example of a solution that is isotonic to body cells is
Definition
0.9%NS
Term
Distilled water is an example of
Definition
a hypotonic solution
Term
Hypotonic solutions cause the cells to
Definition
swell
Term
Hypertonic solutions cause the cells to
Definition
shrink
Term
Homeostasis results from fluid and electorlytes that are
Definition
balanced
Term
If the body loses more electrolytes than fluid, as occurs when a patient has diarrhea, the extracellular fluid will contain fewer electrolytes or less solute than the intracellular fluid. The concentration of solutes to solution is decreased. Fluids are pulled out of the cells into the blood stream as an attempt to equalize to solute/solution ratio. If this process continues thefluid will be
Definition
pulled out of the cells.
Term
Hydrostatic pressure is greater at the
Definition
arterila end of the capillary
Term
The process by which water and solutes pass through a membran when the hydrostatic pressure is greater on one side of the membrane than on the other is called
Definition
filtration
Term
Fluid entering the interstitial space will cause an
Definition
increase in tissue congestion
Term
An abnormal loss of secretions from the GI tract is
Definition
serious
Term
When there is an increased production of aldosterone, the kidneys retain
Definition
more sodium, chloride, and water
Term
An increased production of aldosterone causes a
Definition
loss of potassium
Term
An increase in the production of ADH will lead to an increase in
Definition
urine saving
Term
Potassium administered as a direct IV push is
Definition
Fatal
Term
Edema is the result of
Definition
excess fluid in interstitial spaces
Term
A person who has gastric suction or has had prolonged vomiting will have a deficit of
Definition
water, sodium, and potassium
Term
The nurse obtains all of the following assessment datat about a patient with deficient fluid volume caused by a massive burn injury. Which is of greatest concern?
Definition
The blood pressure is 90/40
The urine ouput os 30 ml over the last hour
Oral fluid intake is 100 ml for the last 8 hour
There is prolonged skin tenting over the sternum.

THE BLOOD PRESSURE IS 90/40
Term
A recetnly admitted patinet has a small cell carcinoma of the lung, which is causing the syndrom of inappropriate antidiuretic homrone. The nurse will monitor carefully for
Definition
increased total urinary output
elevation of serum Hct
decreased serum sodium level
rapid and unexpected weight loss

DECRESED SERUM SODIUM LEVELS
Term
When caring for an alert and oriented elderly patient with a history of dehydration, the home health nurse will teach the patient to icnrease fluid intake
Definition
in the late evening hours
if the mucosa feels dry
when the patient feels thirst
as soon as changes in level of consciousness occur

IF THE ORAL MUCOSA FEELS DRY
Term
Spronolactone, an aldosterone antagonist is prescribed for a patient as a diuretic. Which statement by the patient indicates that the teaching about this medication has been effective
Definition
I will try to drink at least 8 glasses of water each day
I will use salt substitute to decrease my sodium intake
I will increase my intake of potassium containing foods
I will dring apple juice instead of orange juice for breakfast.

I WILL DRINK APPLE JUICE INSTEAD OF ORANGE JUICE FOR BREAKFAST
Term
When caring for a patient admitted with hyponatremia, which actions will the nurse anticpate taking
Definition
Restric the patient's oral free water intake
Term
The home health nurse notes that an elderly patient has low serum protein level. The nurse will plan to asses for
Definition
edema
Term
When teach a patient with renal failure about a low phophate diet the nurs will include information to restrict
Definition
Ingestion of dairy products
Term
Following a thyroidectomy, a patient complains of a tingling feeling around my mouth. The nurse should immediately checke for
Definition
the presence of Chvostek's sign.
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