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Fluid and Electrolytes
Fluid and electrolytes
45
Nursing
Undergraduate 3
11/06/2009

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Cards

Term
Adult water weight %
Definition
40-60%
Term
Insensible fluid loss
Definition
Fluid loss from skin and lungs
Term
Sensible fluid loss
Definition
fluid loss from urination, defecation, wounds and other means
Term
Intracellular fluid
Definition
fluid inside the cells
Term
extracellular fluid
Definition
fluid found outside the cell
Term
Interstitial fluid
Definition
fluid which surrounds the cells
Term
Intravascular fluid
Definition
Plasma, the liquid portion of the blood.
Term
Transcellular fluids
Definition
fluid in the cerbrospinal column, pleural cavity, lymph system, joints and eyes.
Term
Electrolytes
Definition
Charged particles capable of producing electricity.
Term
Isotonic fluids
Definition

has the same solute concentration as another solution. No net fluid shift.

Example: normal saliene- the concentration of sodium in the soultion nearly equals the concentration of sodium in the blood.

Term
Hypotonic solution
Definition

When a less concentrated, soultion is placed nxt to a more concentrated solution fluid shifts from the hypotonic solution into the more concentrated compartment to equalize concentrations.

Example: Half normal saline

Term
Hypertonic fluids
Definition

fluid will move out of theless concentrated solution into the more concentrated or hypertonic solution unitl both solutions have the same amt of solutes of fluid

Ex: Dextrose 5% NS- it is greater than the concentration of solutes in teh pts blood

Term
Osmosis
Definition
Water molecules move from an area of higher concentration to an area of lower concentration. Passive.
Term
Diffusion
Definition
Substances move from an area of higher concentration to an area of lower concentration.
Term
Active Transport
Definition
Moving molecules and Ions against a concentration gradient from an area of lower concentration to an area of higher concentration. It require energy which is usually ATP, example- sodium-potassium pump
Term
Volume expanders
Definition

Increase blood volume from severe blood loss or plasma loss

 

Examples: Albumin, Dextran, Plasma

Term
Isotonic
Definition
Water and Electrolytes are lost or gained in EQUAL proportions
Term
Osmolar
Definition
Loss or gain of water only.
Term

Fluid volume deficit

Hypovolemia

Definition
Body loses water and electrolytes from ECF
Term
Causes of hypovolemia
Definition

Abnormal loss from skin, GI tract or kidneys. Decreased fluid intake, Massive bleeding.

Examples: Excessive diuretic or laxative use, V/N/D, NGT drainage, hemmorage, frank or occult.

Term
Third space fluid shift.
Definition
movement of fluid out of the intravascular space into another body space such as the abdominal cavitiy (stays in the body not the vascular space)
Term
Increased risk for hypovolemia
Definition
bowel, inflammed tissue, burns, crush injuries, pelvis or hip fracturs, pleural effusions, intestinal obstructions, hypoalbuminemia
Term
People at increased risk for hypovolemia
Definition
Children and elderly
Term

Assessment for hypovolemia

(Name at least 4)

Definition
Increased respirations and heart rate, subnormal temps, orthostasis, weight loss, poor skin turgor, dry mucous membranes, decreased urine volume, dark malodorous urine, increased specific gravity, increased HCT, alter LOC and confusion
Term
Goals of hypovolemia
Definition
Restore fluid volume, replace electrolytes as needed, and eliminate cause of fluid volume deficit.
Term
Interventions for hypovolemia
Definition
Assess vital signs, weight, tissue turgor, neck and hand vein filling, mucus membranes, bowel sounds and breath sounds,  mointor labs, I &O, daily weight, adminster fluids PO & IV (isotonic NS or LR)
Term

Hypovolemic shock

(what to do)

Definition
EMERGENCY! multiple fluid challenges given to restore circulating volume. IV therapy, blood transfusions, drugs to support blood pressure, o2 therapy and treat cause.
Term
Hypervolemia
Definition
Body retains water and sodium in similar proportions and the serum Na concentration remains essentially normal.
Term
Causes of hypervolemia
Definition
Excessive intake of salt, rapid adminstration of sodium-containing infusions, excessive irrigation of body cavities or organs, agressive fluid replacements, blood or plasma infusions, use of hypertonic fluids, disease proccesses causing altered regulatory mechanisms.
Term

Assessment of hypervolemia

(name at least 4)

Definition
Weight gain, difficutly breathing, legs swollen, fingers and feet swollen (pitting or nonpitting), mental confusion, tachycardia, full bounding pulses, increased BP
Term
Anasarca
Definition
Severe generalized edema
Term
Interventions for hypervolemia
Definition
assess s/sx of overload, monitor daily weight, vs, I&O, assess and doc. edema, assess breath sounds, pulse oximeter, and heart sounds, position in high  folers, monitor labs and chest xray, restrict fluid and NA, diuretics as ordered, and do client teaching.
Term
Goals for hypervolemia
Definition
maintain fluid balance, prevent respiratory (pulmonary edema) and cardiovascular complications (CHF) and eliminate cause of overload.
Term
Dehydration
Definition
Water lost from body without signif. loss of electrolytes causing increased serum osmolality and increased serum sodium levels. (Hypernatremia)
Term
Cellular dehydration= dehydration
Definition
water is drawn into the intravascular space from the cells
Term
Dehydration causes
Definition
decreased water intake, decreased thrist sensation, prolonged fever, enteral feedings (tube) without sufficient water intake.
Term
People at most risk for dehydration
Definition
infants, confused or comatose patients, elderly, brian injuries or inadequate production of ADH
Term
Assessment for dehydration
Definition
irritability, confusion, dizziness, weakness, extreme thirst, fever, dry skin and mucus membrane, sucken eyeballs, poor turgor, decrease urine output, increased heart rate with falling blood pressure
Term
Interventions for dehydration
Definition
assess vs, weight, tissue turgor, neck and hand vein filling, mucus membranes bowel sounds and breath sounds, monitor daily weight, I &O, labs, monitor LOC, orientation and seizure precautions, assist with mobility, positioning (orthostasis), safety and skin care, mouth care
Term
Fluids to adminster for dehydration
Definition
isotonic NS or LR or hypotonic fluids
Term
Overhydration
Definition
Water intoxication. water is gained in excess of electrolytes causing low serum osmolality and low serum sodium levels.
Term
Overhydration (cells)
Definition
water is drawn into the cells causing them to swell.
Term
Overhydration can lead too...
Definition
cerebral edema, impaired neurological function and death
Term
Overhydration causes
Definition
fluids and electrolytes lost at equal balance but only water is replaced, SIADH, malignant tumors, aids, head injury, drug adminstration, psychogenic polydipsia.
Term
SIADH
Definition
Syndrome of inappropriate antidiuretic hormone
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