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Adult Health > Fluid &Electrolytes > Flashcards

Fluid &Electrolytes Flashcards

1
Q

Osmosis

A

movement of water and small particles pass from an area of lower concentration to an area of higher concentration until concentrations are equalized

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2
Q

Interstitial

A

Fluid around cells- reserve fluid replacing fluid either in the blood vessels or cells depending on the need

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3
Q

Pt with hypovolemia experiencing inadequate tissue perfusion you can expect to see what

A

change in mental status.heart is not being adequately perfused so you can have heart arrhythmias. Urine output less than 30cc an hr. Falling blood pressure tachypnea / falling of bp, organ problems these are signs of failing pt.

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4
Q

Osmolality

A

concentration of particles per kilogram of water too much osmolality higher is too little fluid so inverse relationship if osmolality is lower too much fluid

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5
Q

Osmolarity

A

concentration of particles per liter of solution.(does not have to be water) sn can be serum

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6
Q

hypernatremia causes what

A

pulling of water

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7
Q

The higher the osmolality of a solution, the greater its?

A

pulling power for water (osmotic pressure) sn urinalysis will tell you water osmolarity and serum osmolarity

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8
Q

Serum osmolality is

A

the concentration of particles (major particles are sodium and protein) in the blood plasma

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9
Q

Normal serum osmolality is

A

275-295

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10
Q

Blood Urea Nitrogen (BUN) and glucose are

A

large particles that increase serum osmolality

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11
Q

Isotonic IV Fluids Include:

A

Normal saline, Ringers Solution (contains sodium, potassium, calcium in similar concentrations to plasma and Lactated Ringers ( contains sodium chloride, potassium, calcium and lactate in concentrations similar to plasma

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12
Q

define HYPOTONIC

A

low fluid volume

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13
Q

Patients receiving hypotonic solutions require frequent monitoring of

A

VS, LOC, and circulation to detect depletion of vascular volume (symptoms of inadequate organ perfusion/shock) and cerebral cellular edema (Symptoms of change in level of consciousness

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14
Q

receiving hypotonic require frequent monitoring bc the pulling of water out of vascular into the cells causes decrease?

you will also have signs and symptoms?

A

circulating blood volume

of inadequate circulation

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15
Q

define HYPERTONIC

what does hypertonic cause in the body

A

higher osmolality than normal plasma too little fluid present
lower osmolality means too much fluid

hypernatremia pulling water to try to equalize concentration to bring sodium level down.

cause water to be pulled from the cells into the vessels resulting in increased vascular volume and decreased cell water

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16
Q

Hypertonic IV Solution include

A

Saline solutions greater than 0.9% (3-5%)

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17
Q

intracellular

A

resistant to fluid shift fluid that lives within the cell

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18
Q

Intervascular

A

Fluid within blood vessels- least stable and is quickly lost or gained in response to fluid intake or losses

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19
Q

isotonic fluid

A

fluid primarily in the vascular system.
same osmolality as normal plasma therefore because no osmotic pressure difference is created, fluids remain primarily in the Extracellular fluid (Vascular System)

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20
Q

hypotonic

A

decrease circulating blood volume signs & symptoms of decreased circulating blood volume. loc neurological symptoms

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21
Q

sodium level too low in vascular

A

water move out of vascular into the cell inverse relationship

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22
Q

osmitrol pull fluid from

A

third spaces usually seen in severe ascites and pleural effusions

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23
Q

isotonic solutions

A

expand circulating blood volume

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24
Q

Third Spacing causes

a type of fluid volume deficit

A

injury or inflammation, malnutrition, liver dysfunction, high vascular hydrostatic pressure as seen in heart failure, renal failure

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25
Q

assessment of fluid volume deficit

A

urine output >30cc/hr metnal status change status, dark urine with high specific gravity normal is 1.010 to 1.030, decreased turgor test only on sternum, forehead or inner thigh

26
Q

normal high specific gravity

A

1.010 to 1.030

27
Q

serum osmolality range

A

275-295

28
Q

fluid excess major concerns are cerebral edema congestive heart failure pulmonary edema
sign and symptom

A

adventitious lung sounds you usually see this before peripheral edema

29
Q

causes of isotonic fluid excess

A

renal failure, heart failure, excessive fluid intake, high corticosteroid levels due to therapy, stress response or x

30
Q

hypotonic fluid excess (water intoxication)

A

Repeated plain water enemas or NG tube irrigations with plain water – the free water is drawn into cells while the expelled water washed out electrolytes
Overuse of hypotonic solutions
Syndrome of Inappropriate ADH causes excessive release of ADH causing retention of water

31
Q

Mechanisms of Edema

A

Increased hydrostatic pressure such as hypertension or vascular fluid overload forces more fluid out of the arterial end of the capillary and draws less fluid back into the venous endDecreased oncotic pressure because of decreased albumin or plasma proteins allows more fluid to be pushed out of the arterial end and draws less fluid back into the venous end

32
Q

how to grade edema

A

1+ (minimal) to 4+ (severe)

33
Q

anasarca

A

generalized edema seen in periorbital area most often related to heart, liver, and kidney problems.

34
Q

fluid excess assessment

A

distended jugular neck vein when head of bed is elevated to 45 degrees, decreased 02 sat, wet lung sounds crackles, gallop s3 heart sound, tight shiny skin , delayed vein emptying >5 secs when hand raised, tachypnea, dyspnea, productive cough

35
Q

fluid excess diagnostic test

A

low serum sodium <125
serum osmolality <275
chest x-rays may show pleural effusions

36
Q

risk factors associated with fluid volume excess

A

elderly because of decreased heart and kidney function

infants and children 2-12 have less stable regulatory response to fluid imbalances

acute illness surgery stimulates the stress response
chronic illness-cardiac dx, cardiac output with less perfusion of kidneys
renal dx leads to abnormal retention of water

37
Q

ways to fix fluid volume excess

A

1000-1500/day
240cc is cup of water

sodium restriction
promote excretion by using loop diuretics (furosemdie-lasix)
potassium sparing diuretics (spironolactone-aldactone), thiazide diuretics,
human b-type natriuretic peptide (hBNP)

digoxin, beta-blocking agents and ace increase cardiac output and renal perfusion

38
Q

sodium level in the vasculature is too high what happens ( excess particles less water)

sodium lower than normal what occurs (less particles excess water)

A

fluid moves from cell to vasculature brain can be dehydrated

fluid is going to move from the vasculature into the cells which can cerebral edema which will be manifested by neurological changes

39
Q

counseling a patient for a low sodium diet what would you tell them to eat

A

fresh meat, fish, vegetables and fruits, no-added salt snack items, sodium free spices, low sodium canned products

40
Q

hyponatremic response

A

adh- renal sodium excretion is decreased by stimulating less fluid excretion by the kidneys

aldosterone promotes sodium retention and potassium excretion

osmotic force of water in the brain can lead to the development of cerebral edema

41
Q

hyponatremia predisposing clinical conditions

A

renal losses through excretion, diuretic administration and renal dx.
GI losses through vomiting, diarrhea, gastric suctioning, tap water enemas, GI surgeries and bulimia.
Skin losses through perspiration, burns, tissue destruction
Wound drainage and wound suctioning

42
Q

what hyponatremia assessment can you used on your patients to determine if they have low sodium serum

A

thirst, neuromuscular problems lethargy, weakness, and neurological changes headaches confusion, agitation, dizziness, seizures

43
Q

What assessment findings do you see with decreased vascular volume

What assessment findings do you see with increased vascular volume

A

tachycardia, hypotension, pale dry skin and dry mucous membrane

hypertension, bounding pulse, edema and weight gain

44
Q

Diagnostic test for Hyponatremia

A

serum sodium <135
urine specific gravity <1.010
decreased BUN and Hematocrit

45
Q

hyponatremia with hypovolemic volume is treated with?

A

normal saline or lactated ringers

46
Q

hypernatremia-assesment

A

tachycardia, hypertension, dry sticky mucous membrane, thirst, increased urine output, twitching, tremor, hyper-reflexia, agitation, watery diarrhea, nausea, chloride level may also be elevated

47
Q

what are some important consideration for administering potassium

Iv potassium administration should not be infused more quickly than

never give potassium through which routes

you are always supposed to use IV through what?

A

administer potassium oral supplements with at least 4 oz of fluid
never crush or break tablets or capsules
take potassium with or after meals

10-20mEq in 100 cc NS/hr or in concentrations greater than 40mEq per liter

iv push or im

infusion pump

48
Q

Potassium should be administered in ____free solutions to avoid the release of insulin which will transport the potassium into cells.

If more than _____ is administered the client should have continuous ___ and have potassium levels checked every ___ to __ hrs.

A

dextrose

20mEq/hr
EKG monitoring
4-6 hours

49
Q

elevated potassium levels results from decreased excretion due to what?

A

adrenal and renal insufficiencies

50
Q

what are a few reasons someone can have hyperkalemia of >5.0

A

excessive potassium intake, potassium sparing diuretics, decreased excretion due to adrenal and kidney insufficiencies, burns, gi bleeds, insulin deficiencies, metabolic acidosis,

51
Q

what are some signs you will see in a pt that has hyperkalemia

A

Irregular slow heart rate
Decreased blood pressure
EKG changes: tall, peaked T waves, widened QRS, frequent abnormal beats and ventricular arrhythmias
Muscle twitching, muscle cramps

52
Q

Hyperkalemia nursing Interventions

A

Restrict potassium intake,
Monitor labs,
Monitor for cardiac arrhythmias, metabolic acidosis, administer diuretics as ordered.

Beware that numerous blood transfusions can cause elevated potassium unless administered in the form of packed red blood cells,

53
Q

calcium function as a extracellular cation found in hard bones and provide what functions in the body?

A

skeletal and heart muscle relaxation activation, excitation and contraction,
calming effect on nerve cells, blood clotting - innervates conversion of prothrombin to thrombin, bone and teeth health, lactation

54
Q

calcium regulation is stimulated by what?

A

parathyroid hormone

55
Q

calcium levels are dependent upon?

what does calcitrol do ?

what is calcitonin

calcium and ____ levels are inversely related?

A

calcitrol

they play a major role in prevention of hypocalcemia and hypomagnesemia noted by neuromuscular irritability

a calcium lowering hormone produced by the thyroid – counteracts PTH by transferring calcium from plasma to skeletal system

phosphorus

56
Q

adults need to consume how much calcium daily?

pregnant, lactating, and postmeno women need to consume how much calcium daily

A

1000-1200mg

1200-1500mg

57
Q

what are a few causes of hypocalcemia

A

hypoparathyroidism, hypomagnesemia, massive blood transfusions,
hypoalbuminemia, acute pancreatitis- Calcium in the intestine binds to undigested fat and excreted via GI tract,
inadequate vitamin D,
Renal dx

58
Q

what are the clinical manifestations seen with hypocalcemia?

what are two crucial ways to test for hypocalcemia and what are the following test consist of?

A

Tetany/laryngospasm – airway obstruction, Hyperactive deep tendon reflexes, Hyperactive bowel sounds, abdominal cramps diarrhea, mental status changes, Hypotension, decreased cardiac contractility

Chvostek’s (tapping facial nerve results in facial muscle contraction and twitching) and Trousseau’s(inflation of BP cuff upper arm 20 mm above systolic for 3 minutes results in carpal spasm) signs positive

59
Q

Interventions with a pt affected by hypocalcemia?

A

Daily oral doses or elemental calcium gluconate 1-3 gms per day
Vitamin D to absorb calcium 400-1000IU
Phosphorus binding antacids to increase calcium
Monitor lab values and for signs of tetany
Have emergency equipment at the bedside for high risk clients to manage airway obstruction (laryngospasm) 100% oxygen via rebreather mask

60
Q

Basic Metabolic Profile

Glucose
Sodium
Potassium
BUN
Creatinine
C02

Anion Gap

A 
70-120
135-145
3.5-5
5-20
0.6-1.3
22-26 <22 associated with respiratory alkalosis or metabolic acidosis;  >26 associated with respiratory acidosis or metabolic alkalosis

3-11(Serum sodium minus the sum of the chloride and bicarbonate levels) Anion gap is increased in metabolic acidosis associated with acid gain but remains normal in metabolic acidosis caused by bicarbonate loss

61
Q

Hypercalcemia can be caused by ?

A

Steroids – increase calcium reabsorption from bone

Metastatic Cancer – most common cause related to increased release of calcium from bone that is destroyed; tumor cells can stimulate bone reabsorption and increased calcium excretion from bones

Renal insufficiency or failure

62
Q

Hypercalcemia treatment and nursing interventions

A 
Isotonic solutions at 300-500 ml/hr and up to 6 liters until vascular volume restored or calcium 8-9
Synthetic calcitonin to lower levels
Low calcium diet
Loop diuretics to promote excretion
IV phosphorous
Dialysis

Adult Health (3 decks)

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