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Critical Care Nursing Nursing (RN) School Study Aid
Normal Electrolyte Lab Values
- Potassium (K+)
- 3.5 to 5.0 mEq/L
- Calcium (Ca2+)
- 8.5 to 10.5 mg/dL
- Phosphate (PO43–)
- 2.5 to 4.5 mg/dL
- Magnesium (Mg2+)
- 1.5 to 2.5 mEq/L
- Sodium (Na+)
- 135 to 145 mEq/L
- Chloride (Cl–)
- 95 to 105 mEq/L
1 min
Potassium (K+) Lab Value
- 3.5 to 5.0 mEq/L
20 secs
Sodium (Na+) Lab Value
- 135-145 mEq/L
24 secs
Chloride (Cl-) Lab Value
- 95-105 mEq/L
27 secs
Calcium (Ca2+) Lab Value
- 8.5 to 10.5 mg/dL
25 secs
Phosphate (PO43-) Lab Value
- 2.5 to 4.5 mg/dL
29 secs
Magnesium (Mg2+) Lab Value
- 1.5 to 2.5 mEq/L
28 secs
BUN (Blood Urea Nitrogen) Lab Values
- 10-20 mg/dL
40 secs
Creatinine Lab Values
- Measures Renal Function
- 0.6 - 1.3 mg/dL
1 min
Bilirubin Lab Value
- 0.2-1.2 mg/dL
- Increased Bilirubin Causes Jaundice
54 secs
Albumin Lab Value
- 3.5 - 5.0 g/dL
42 secs
Total Protein Lab Values
- 6.4 - 8.3 g/dL
1 min
Liver Enzyme Tests: AST and ALT
- AST/ALT Ratio
- AST: 10-30 U/L
- ALT: 10-40 U/L
1 min
WBC Differential Lab Value
- White Blood Cells (WBC)
- 5-10 (5,000-10,000)
- Leukocyte Differential
- Neutrophils (50%-70%)
- Bands (2%-5%)
- Segs (50%-70%)
- Lymphocytes (20%-40%)
- Monocytes (4%-8%)
- Eosinophils (2%-4%)
- Basophils (0.5%-1.5%)
1 min
Red Blood Cell Count (RBC) Lab Values
- Women: 3.5-5.5 million cells/ MuL
- Men: 4.3-5.9 million cells/ MuL
1 min
Hemoglobin (Hgb) Lab Values
- Men: 13 - 17 g/dL
- Women: 12 - 16 g/dL
46 secs
Hematocrit (Hct) Lab Values
- Men: 40% - 54%
- Women: 35% - 47%
1 min
PT/PTT Lab Values
- Prothrombin Time (PT)
- 10-14 seconds
- Activated Partial Thromboplastin Time (PTT or aPTT)
- 25-35 seconds
1 min
INR Lab Value
- 0.8-1.2 Normal Range
- Warfarin
- 2.0-3.0
1 min
Platelet Lab Value
- 150,000-400,000 Micro L
40 secs
Bleeding Time Lab Values
- 2-7 Minutes
40 secs
pH - Blood and Urine Lab Value
- Blood
- 7.35 - 7.45
- Urine
- 4.0 - 8.0
1 min
Urine Specific Gravity Lab Value
- 1.003-1.030
1 min
Blood Glucose Lab Value
- 70-100 mg/dL
25 secs
Hemoglobin A1c Lab Value
- 4-6%
1 min
Cholesterol Lab Values
- LDL (Low Density Cholesterol)
- < 100 mg/dL
- HDL (High Density Cholesterol)
- > 40 mg/dL Males
- > 50 mg/dL Females
- Total Cholesterol
- < 200 mg/dL
1 min
Triglycerides Lab Value
- < 150 mg/dL
50 secs
Troponin Lab Values
- Troponin T (cTnT)
- < 0.1 ng/mL Normal
- Troponin I (cTnI)
- < 0.5 ng/mL Normal
- > 2.3 ng/mL Myocardial Injury
1 min
Cardiac Enzyme Evaluation: Myoglobin
- Measures
- Skeletal or Cardiac Muscle Injury
- Time Ranges
- Onset: 1 - 4 Hours
- Peak: 12 Hours
- Return to Normal: 24 Hours
- Considerations
- Elevation After 24 Hours: Reinfarction
1 min
Cardiac Enzyme Evaluation: Troponin
- Measures
- Cardiac Muscle Injury
- Time Ranges
- Onset: 1 Hour
- Peak: 10 - 24 Hours
- Return to Normal: 5 - 14 Days
- Considerations
- Most Specific for Cardiac Muscle
- Treated Aggressively
1 min
Cardiac Enzyme Evaluation: Creatine Kinase CK-MB
- Measures
- Skeletal or Cardiac Muscle Injury
- Time Ranges
- Onset: 4-8 Hours
- Peak: 12-24 Hours
- Return to Normal: 2-3 Days
1 min
CSF Lab Values: Normal
- Pressure: < 20 cm H2O
- Color/Appearance: Clear or Colorless
- Proteins: < 40 mg/dL
- Lactate Dehydrogenase: 10% of Serum Level
- Cells: 0-5 Small Lymphocytes
- Glucose: 40-70 mg/dL
1 min
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