Electrolytes II Flashcards
Na+ range
135 - 145
K+ range
3.5 - 5
Ca+
Total
Ionized
Total 8.5 - 10.5 mg/ dL
Ionized 4 - 6mg / dL
Mg+ range
1.3 - 2.1mEq/L
Cl- range
95 - 105 mEq/L
PO4- phosphate
Range
2.5 - 4.5 mg/ dl
Electrolyte Relationships
Sodium / Potassium
(Similar / Inverse)
High Na = ___K
Inverse
High Na =Low K
Electrolyte Relationships
Calcium /Phosphorus
High Calcium = ___ Phosphorus
Inverse
High Ca = Low Phos
Electrolyte Relationships
Calcium / Vitamin D
Similar or Inverse
Similar
High Ca = high Vit D
Electrolyte Relationships
Magnesium/ Calcium
Similar or Inverse
Low Mg = ____ Ca
Similar
Low Mg = Low Ca
Electrolyte Relationships
Magnesium/ Potassium
Similar or Inverse
If there is high Mg there will be ___ K
Similar
High Mg = high K
Electrolyte Relationships
Magnesium/ Phosphorus
Similar or Inverse
Low Mg = ___ Phos
Inverse
Low Mg = High Phos
Besties with H²O
Sodium NA+ 135 - 145mEq/L
Fluid distribution and elimination (BP)
Sodium NA+ 135 - 145mEq/L
Transmits impulses in nerve and muscle fibers
Sodium NA+ 135 - 145mEq/L
How many weeks vacation do RNs get per year
2 atleast to start
Plus 2.5x pay for holidays
Maintained by ADH & Assisted by Aldostrone
Sodium NA+ 135 - 145mEq/L
Neurological symptoms are most likly due to this electrolyte
Sodium NA+ 135 - 145mEq/L
Labs for Diagnostic for Hyponatremia
Serium osmolality Less than….
Serum Sodium level Less than….
Urine specific gravity less than…. (unless SIADH)
What happens to the Hemocrit and plasma protein
Labs for Diagnostic for Hyponatremia
Serium osmolality (280 mOsm/kg) Less than 280
Serum Sodium level Less than 135
Urine specific gravity less than 1.010 (unless SIADH)
Hemocrit & plasma proteins elevated
Sodium levels may appear low bc too much fluid is in the body?
Isovolemic hyponatremia
This type of hyponatremia
S/S
Maybe no signs
Thrist in SIADH (High Concentration Urine, increased ADH)
Primary polydipsia
NEURO/PSYCH
Isovolemic Hyponatremia
This type of Hyponatremia
Causes
Glucocortidicoid deficiency (causing inadequate fluid filtration by kidneys)
Hypothyroidism (limited water excretion)
Renal failure (increased H2O levels)
Medication: Psych / Lithium
Tramatic Brain Injury
Adrenal Insufficiency
SIADH (too much ADH causes, increased thrist, H2O retention, increased NA+ excretion)
Isovolemic Hyponatremia
Interventions for this type Hyponatremia
Oral urea (extreme cases)
Fluid restrictions
1L q day
Increases Serum osmolality/ stabilizes ADH
High Na+ Diet
Daily weight
I & Os
NEURO CHECKS
SODIUM CHLORIDE TABS
Isovolemic hyponatremia
Diagnostics
Low urine sodium <25
Low urine osmolality <100
Hypovolemic hyponatremia
low urine sodium and low urine osmolality in the context of hyponatremia suggests a situation where the body is conserving sodium and attempting to retain water, likely due to a loss of both sodium and water (hypovolemia).
Result from conditions such as vomiting, diarrhea, excessive sweating, or the use of diuretics.
Both sodium and water are decreased in extracellular area, sodium loss is greater than water loss
Hypovolemic hyponatremia
Renal causes
Salt-losing nephritis adrenal insufficiency
Diuretic use, loop, thiazide (volume depletion, thirst and H²O retention)
Osmotic diuresis (Inhibiting Na+ reabsorbs)
Hypovolemic Hyponatremia
S/ S
Mental confusion, headache
Altered LOC
hyperirritability, anxiety
Tremors, seizures
Hyperreflexia, muscle weakness, twitching
Nausea, Vomiting, abdominal cramps
Edema and weight gain
Hypovolemic Hyponatremia
Non-renal Causes
Vomiting
Diarrhea
Fistulas
Sweating excess
Burns
Continuous NG suction
Hypovolemic Hyponatremia
Interventions
High Na+ Diet
Daily weight / I & O
Neuro checks
Sodium Chloride tabs
ISOTONIC IV FLUIDS (NO D5W)
Hypovolemia hyponatremia
Diagnostics
Low urine sodium
GI loss (diarrhea)
Renal loss due to diuretics (after diauretics stopped)
Third spacing
Hypovolemia hyponatremia
High urine sodium
> 40 mEq/L
Metabolic alkalosis (Vomiting)
Renal Salt losses due to diuretics
Adrenal insufficiency, or cerebral salt wasting
Hypovolemia hyponatremia
Both sodium and water are INCREASED in the EXTRACELLULAR area, but water gain is more than sodium gain (Aldosterone)
Hypervolemic Hyponatremia
S /S
Edema / Third Spacing
Hypertension
Weight gain
Rapid / Bounding pulse
Causes
Heart Failure
Renal failure
Liver failure
Nephrotic syndrome
EXCESSIVE ADMINISTRATION OF HYPOTONIC IV
HYPERALDOSTRONE
Hypervolemic hyponatremia
Interventions
High Na+ diet
Daily weight/ I & O
Neuro checks
Sodium chloride tabs
ISOTONIC IV FLUIDS (NO D5W)
Maybe given dose of Lasix while receiving hypertonic solutions
Hypervolemic hyponatremia
The normal serum osmolality is _____ mOsm/kg.
Lower significa….
Higher…
285–295
Lower: less solutes in water Over hydration
Higher: more solutes in water Dehydration
Addisons adreal insufficiency
SIADH
Fluid Overload: CHF, Liver failure
Renal problems, NG
This electrolyte problem
Hyponatremia
<135
Assessment for Hyponatremia
SALT LOSS
S = Seizures
A = ____ cramps
L =
T= tendon reflex
L = loss ____
O =
S = ____ Respiration
S = ____ of muscles
Seizures & Stupor
Abdominal cramping & Attitude
Lethargic
Tendon Reflexes Diminished
Loss Urine/ Appetite
Orthostatic Hypotension/ Overactive bowle sounds
Shallow respiration (late Dev- muscle weakness)
Spasms of muscles
S/S
Restlessness
Fever / Flushed Skin
Nause / Vomiting
Lethargy/ Confused
Seizures/ Coma
TWITCHING/ HYPERREFLEXIA
ATAXIA
Causes:
Hypothalamus lesion
Elderly / Confused
Infants
May appear hypervolemic
Elevated BP
Bounding pulse
Dyspnea
Hypernatremia > 145
Causes (electrolyte imbalance)
Cushing’s syndrome & hyperventilating
GI feeding out H2O
Corticosteroids, failed compensatory
Aldosterone (too much)
Thirst impairment
Hypernatremia >145
Hypernatremia
No FRIED foods for you
F = (2)
R = Relaxed or Restlessness
I = increased (2)
E = (2)
D = Describe Skin
Fever & Flushed Skin
Restlessness
Increased fluid retention/ increased deep tendon reflexes
Edema, extremely confused
Dry skin, decreased tugor, dry mucous
Decreased urine output
For Hypernatremia >145 use this IV bag
D5 / .45% or
D5W
Why do you use
D5 / .45% or
D5W
To treat Hypernatremia >145
Gradual reduction to prevent cerebal edema
Hypernatremia Vs Hyponatremia
Agitation
Confusion
Flushed Skin / low fever
Thrist
Restlessness
Weakness
Hypernatremia Vs Hyponatremia
Decreased Reflexes
Ab cramps
Leathargy /Confused
Headache
Muscle twitching
Nausea / Vomiting
Anorexia
Hypernatremia
Agitation
Confusion
Flushed Skin / low fever
Thrist
Restlessness
Weakness
Hyponatremia
Decreased Reflexes
Ab cramps
Leathargy /Confused
Headache
Muscle twitching
Nausea / Vomiting
Anorexia
Assist in skeletal and heart muscle contraction
Aids in transmission of nerve impulse
Acid base balance
Potassium
Hydrogen- potassium exchange
When there is an increase in extracellular acidity (low pH), cells may take up more hydrogen ions in exchange for releasing potassium ions.
How is the most K+ lost
Urine 80%
______ stimulates Na+ reabsorption and K+ excretion
Aldosterone
(Low / High) pH in ECF can cause H+ to be substituted for K+ to maintain ICF neutrality
Low (Acidic)
<7.35
Norm
7.35 to 7.45.
Cellular Excitability:
The sodium-potassium pump helps establish and maintain the resting membrane potential of cells, which is critical for electrical excitability and nerve impulse transmission.
Osmotic Balance:
By regulating the concentration of sodium and potassium ions, the pump helps control osmotic balance, preventing cells from swelling or shrinking excessively.
Energy Conservation:
The pump consumes energy (in the form of ATP) to move ions against their gradients. This constant energy expenditure contributes to overall cellular metabolism.
Secondary Active Transport:
The sodium-potassium pump creates a sodium concentration gradient that indirectly drives the cotransport of other substances, such as glucose and amino acids, into cells.
All describe the action of which ACTIVE TRANSPORT mechanism
Sodium Potassium Pump
Cushings syndrome
Decreased Magnesium
Hyperaldostronism
Hepatic disease
Hyperglycemia
Lasix, steroids, laxatives
Respiratory alkalosis
Hypokalemia <3.5
Severe <2.5
Your body threw K+ in the DITCH
D = drugs (name them)
I = inadequate intake K+
T = too much _____
C = ______ syndrome
H = heavy fluid loss
(Hypokalemia)
Hypokalemia
Drugs (laxatives, diuretics, corticosteroids)
Inadequate intake of K+
Too much water
Cushings syndrome
Heavy fluid loss (NG suction, N&V, wound drainage, Profuse sweat)