IV Flashcards
The most common electrolytes in the body
Sodium, potassium, calcium, bicarbonate, chloride, magnesium, phosphate
Elecytolye
An element or compound that, when dissolved or dissociated in water or solvent, separates into ions
Why must we add electrolytes to fluids
In order to create an isotonic solution for the body
Regulation of body fluids occurs by
Intake, output, hormonally
Fluids and solutes move through membrane by 4 processes
Osmosis, diffusions, filtaration, carrier mediated transport
Fluid output occurs where
Fluid lost through, skin, lungs, GI tract
Insensible loss (20-25 mLs per hour)
Sensible water loss (varies greatly)
Fluid intake regularted by
Osmoreceptors
Usual Fluid intake per day
2200-2700 mLs per day
Hormonal regulation of fluids
ADH
Renin-Angiotensin aldosterone mech (released by adrenal cortex by falling sodium levels)
Atrial natrietic peptides (respond to low fluid circulating blood volume)
Everytime someone has fluids they have electrolytes checked every _____
48 hours
Prolonged and severe compromises in electrolyte balance can result in
irreversible chronic health problems
Interventions to fluid imbalance include?
Enteral fluid replacement
Restriction of fluids
Parental replacement of fluids/electrolytes
two main categories of Iv theerapy
Crystaloid and colliodM
Most common category of IV thereapy
Crystaloid
Cyrstaloid solutions
Glucose, sodium cholrid and lactated ringer solutions
Vary in tonicity
Cross semipermeable membranes
Colloid solutions
Remain suspended in intervascular space to incrase vascular pressure/vascular volume in critical situations
Contain proteins and starch
Crystaloids divideed based onto tonicity into
Isotonic, hypertonic, hypotonic
Isotonic crystalloid solutions
Same tonicity as blood
Fill same fluid volume space as blood
The fluid goes equally through inter and extracellular spaces
Most common 0.9 NaCl solution
2nd most common Desxtroce 5% in water
3rd Ringers Lactate
.9% NacL is
Isotonic
Anything more than 0.9% NaCl would be
Hypertonic
Anything less than 0.9% NaCl would be
Hypotonic
How often are bags changed and tubing changed
Depends on hospital policy
Things a nurse must be aware of when caring for a patient with an IV
Safety alerts for electrolytes
NaCl is NEVER given by direct intravenous infusion
IV pumps/volume controlled devices - ensure prescribed rate of infusion
- Must be used for meds requiring preseise rates of admin
Antifreeflow safeguard preventing bolus infusion in event of machine malfunction and IS required
- Manufactured recommendation for procedure should ALWAYs be followed and checked