Medications, Consultations & Prevention of Inpatient Complications Flashcards
What are the approaches to fluid management?
4Rs
Routine Maintenance
Replacement
Redistribution
Resuscitation
What do intravascularly dry patients look like?
Decreased urine output
CVP
IVC
Hypotension
Tachycardia
Decreased weight
What is the goal of fluids
maintain hemodynamic stability, euvolemic state
What are the daily fluid requirements
25-30ml/kg/day of water (total fluid)
*rarely more than 3L per day
When should enteral nutrition be considered
if NPO > 3days
how should fluids be dosed for obese patients
weight based dosing should be off ideal body weight, not actual body weight
who are fluid requirements lower for
elderly
CKD
CHF
malnourished patients
What does tonicity define
the cell
What is hypertonic fluid
tonicity higher than that of the blood
for TBI, fluid shifts, hyponatremia
3% NACL, 7% NACL, D10W and higher concentrations
What are Colloids
high molecular weight, will stay in intravascular space longer
albumin (16hrs intravasc vs 30min NS), hetastarch
What is Isotonic
denoting or relating to a solution having the same osmotic pressure as some other solution, especially one in a cell or a body fluid
NS, LR, D5W, plasmalyte
what is Hypotonic fluid
tonicity is lower thant hat of the blood, used for hypernatremia
.45% NACL (1/2NS), D2.5W
What is Crystalloids
isotonic but hypo-oncotic lack the large proteins that keep fluid intravascularly
NS, LR
What are balanced crystalloids
include lactate or acetate, they are buffered, low Cl-
LR, Plasmalyte
What does 0.45% hypotonic saline increase the risk of
cerebral edema
rarely used
used in patients with hypovolemia in setting of hypernatremia
when do we use 3% hypertonic saline
symptomatic hyponatremia
elevated ICP (d/t TBI, bleed, concern for herniation)
What can occur with innapropriate 3% hypertonic saline administration
osmotic demyelination syndrome
What is the pH of LR
6.5
What is within LR
(components)
Ca2+, K+, Cl-, Na+
Will patients who recieve LR get lactic acidosis
NO
may cause increase lactate but not lactic acid
what is contraindicated in newonates with LR
Ceftriaxone
What are the CONS of NS
intracellular potassium depletion
Hypercholremic metabolic acidosis
neutrophil activation
pH 5.5
(high volume can cause hypercholremic metabolic acidosis)
What is Plasmalyte
balanced crystalloid fluid
What is D5W
dextrose 5% in free water
used in hypoglycemia
what makes up 50% of all plasma proteins
albumin
If a trauma patient is hypotensive, what fluids should they NOT recieve
crystalloid fluids
in a trauma if a patient looses 1L of blood how much fluid and what type will they need
3L (ish) of crystalloid to maintain normovolemia
how much of fluids will remain as intravascular volume
30%