Lab Values/Meanings Flashcards Preview

Pharmacy School 2016-17 > Lab Values/Meanings > Flashcards

Flashcards in Lab Values/Meanings Deck (19):
1

Components of CHEM-7

Na, Cl, BUN, K, CO2, SCr, Glucose

2

Sodium

135-145 mEq/L

Major regulating factor for bodily water balance

Hypernatremia could result from more water loss than Na loss or an IV hypertonic solution

3

Potassium

3.5-5.0 mEq/L

Regulation of muscle and nerve excitability through action potentials

Hypokalemia shifts due to insulin or dextrose. Deficit could result from diet, meds, vomiting or diarrhea

Hyperkalemia symptoms include rhythm disorders, bradycardia or cardiac arrest. Can result in crush injuries, burns or hemolysis. May also result from increased intake, renal failure or drugs.

4

Chloride

96-106 mEq/L

Passive role in balancing positive charge; follows sodium to maintain osmolarity

5

Bicarbonate

22-32 mEq/mL

Total carbon dioxide which is a measure of serum bicarbonate (needed for acid-base balance)

Assesses metabolic pH status

Metabolic alkalosis (headache, lethargy, tetany)

Metabolic acidosis (increased breath rate)

6

BUN

Blood Urea Nitrogen

8-20 mEq/mL

Measure of serum nitrogen as a waste product from protein metabolism

Useful in assessing renal function and hydration status; also for liver and nutrition status

7

Serum Creatinine

0.7-1.2 mg/dL

Produced in muscle as decomposition product and excreted by kidneys

BUN:SCr greater than 20:1 = pre-renal

Used to evaluate renal function

8

Ideal Body Weight Calc

Males: 50kg + 2.3(inches over 5 ft)
Females: 45.4kg +2.3(inches over 5 ft)

9

Adjusted Body Weight Calc

ABW = IBW + 0.4(ABW-IBW)

10

Crockcroft-Gault

Used to calculate CrCl

[(140-age)x(weight in kg)] / SCr x 72

x.85 for females

11

Glucose

70-110 mg/dL

Fuel for most cellular processes (need 40 for brain function; 450 is critical)

Worry about ketoacidosis at critical value

12

Magnesium

1.5-2.2 mEq/L

Involved in neuromuscular and enzymatic functions

Linked with potassium

Used for treatment of chronic Torsades de pointes

13

Calcium

8.5-10.8 mg/dL

Involved in neuromuscular activity, endocrine function and bone health

Bound to serum albumin

Corrected Ca = [.8x(4mg/dL - Alb)] + Ca

Hypocalcemia (parasthesis, tetany)
Hypercalcemia (twitching, kidney stones, constipation)

14

Phosphate

2.6-4.5 mg/dL

Component of phospholipid membranes and high energy ATP bonds

Hyperphosphatemia common in CKD (take phosphate binders) and associated with hypocalcemia

15

Albumin

3.5-5 g/dL

main serum protein produced by liver

Binds ions and drugs

Hyperalbuminemia not really an issue and might result from sudden dehydration

Hypoalbuminemia from liver failure or nutrition issues

16

Hemoglobin

Males: 14-18 g/dL
Females: 12-16 g/dL

Measure of oxygen transport in blood

17

Hematocrit

Male: 42-50%
Female: 36-45%

Indicates percent of volume of blood composed of erythrocytes after being centrifuged or the "packed cell volume"

18

WBCs

3.8-10.8 x 10^3 cells per micro-liter

19

Platelets

140-440 x 10^3 micro-liters

Involved in forming clots