Test 1 Flashcards
(42 cards)
What causes dehydration?
excessive fluid losses
Fluid shifts
What causes fluid volume excess?
Decreased fluid losses
Fluid shifts
A 1 kg weight loss or gain equates to what in dehydration assessments?
Around 1 liter of fluid
What is the ideal method for rehydrating a dehydrated patient?
PO fluids
What are the standard lab values for urine output?
0.5mL/kg/hr
What is the standard lab value for Hct?
36-49%
What is the standard lab value for urine specific gravity?
1.005-1.030
What sodium levels indicate hypoatremia?
Sodium <135
What sodium levels indicate hypernatremia?
Sodium >145
What is hypovolemic hyponatremia?
water volume decreases slightly or remains relatively stable but sodium depletes due to other modalities
What is hypervolemix hyponatremia?
Water volume increases while sodium intake is stable, leading to a decreased level of sodium
What types of things can cause a sodium excess?
Excessive sodium intake
hypertonic IV fluids
hypertonic enteral feedings without adequate water
What potassium levels indicate hypokalemia?
Potassium <3/5%
What potassium levels indicate hyperkalemia?
Potassium >5%
What vitamin does calcium require to be absorbed?
Vitamin D
What calcium levels indicate hypocalcemia?
Calcuium <9
What calcium levels indicate hypercalcemia?
Calcium >10.5
A patient that is exhibiting Trousseau’s sign when the BP is inflated could be suffering from?
Hypocalcemia
Calcium has an inverse relationship with?
phosphate
Blood transfusions can cause hypocalcemia. Why is this?
The citrate preservatives in blood products bind to calcium
What is the most common cause of hypercalcemia?
an overproduction of parathyroid hormone
Other causes include prolonged periods of immobilization, malignancy, or excessive intake of vitamin D or dietary calcium
What calcium levels would indicate hypercalcemia?
Calcium >10.5
______________ levels effect potassium and sodium absorption.
Magnesium
What magnesium levels indicate hypomagnesmia?
Magnesium <1.3 mRq/L