CRT/RRT Exam Review | Questions with 100% Verified Answers | Latest Update 2026/2027

CRT/RRT Exam Review | Questions with 100% Verified
Answers | Latest Update 2026/2027
Question: bleeding time (template)
Answer: less than 10 minutes


Question: erythrocyte count
Answer: 4.2 - 5.9 million/mcl


Question: erythrocyte sedimentation rate (Westergren)
Answer: Male: 0-15mm/hr
Female: 0-20 mm/hr


Question: hematocrit, blood
Answer: Male: 42-50%
Female: 40 - 48%


Question: hemoglobin, blood
Answer: Male: 13-16 g/dl
Female: 12-15 g/dl


Question: leukocyte count and differential
Answer: leukocyte count: 4000-11000/mcl
50-70% segmented neutrophils
0-5% band forms, 0-3% eosinophils
0-1% basophils, 30-45% lymphocytes
0-6% monocytes


Question: mean corpuscular volume
Answer: 86-98 fL


Question: protrhombin time, plasma
Answer: 11-13 seconds


Question: partial thromboplastin time (activated)
Answer: 30-40 seconds


Question: platelet count
Answer: 150,000 - 300,000/mcL

,Question: reticulocyte count
Answer: 0.5 - 1.5% of red cells


Question: amylase, serum
Answer: 25 - 125 U/L


Question: arterial studies, blood (Patient breathing room air): PO2
Answer: 75-100 mmHg


Question: arterial studies, blood (Patient breathing room air): PCO2
Answer: 38-42mmHg


Question: arterial studies, blood (Patient breathing room air): Bicarbonate
Answer: 23-26 mEq/L


Question: arterial studies, blood (Patient breathing room air): pH
Answer: 7.38 - 7.44


Question: arterial studies, blood (Patient breathing room air): Oxygen Saturation
Answer: 95% or greater


Question: bicarbonate, serum
Answer: 23 - 28 mEq/L


Question: bilirubin, serum:
Answer: Total 0.3 - 1.0 mg/dL
Direct 0.1 - 0.3 mg/dL


Question: Comprehensive metabolic panel: Bilirubin, serum (total)
Answer: 0.3 - 1.0 mg/dL


Question: Comprehensive metabolic panel: calcium, serum
Answer: Male: 9.0 -10.5mg/dL
Female: 8.5 - 10.2mg/dL


Question: Comprehensive metabolic panel: cholesterol, serum (total)
Answer: Desirable: less than 200md/dL
Borderline-high: 200-239mg/dL(may be high in the presence of coronary artery
disease
or other risk factors)
High: greater than 239md/dL

, Question: Comprehensive metabolic panel: creatinine, serum
Answer: 0.7-1.5 mg/dL


Question: Glucose, plasma
Answer: Normal (fasting); 70 -115 mg/dL
Borderline: 115-140 mg/dL
Abnormal: greater than 140 mg/dL


Question: phosphorus, serum
Answer: 3.0 - 4.5 mg/dL


Question: Proteins, serum: Pre-Albumin
Answer: 0.2 - 0.4 g/dL


Question: Proteins, serum: Albumin
Answer: 3.5 - 5.5 g/dL


Question: Urea nitrogen, blood (BUN)
Answer: 8 - 20 mg/dL


Question: Uric acid, serum
Answer: 3.0 -7.0 mg/dL


Question: Cholesterol serum: High density lipoprotein (HDL)
Answer: Low: less than 40 mg/dL


Question: Cholesterol serum: Low density lipoprotein (LDL)
Answer: Optimal: less than 100mg/dL
Near optimal: 100 - 129 mg/dL
Borderline-high: 130-159 mg/dL (may be high in the presence of coronary artery
disease
or other risk factors)
High: 160 - 189 mg/dL
Very high: 190 mg/dL and bove


Question: Triglycerides, serum (fasting)
Answer: Normal: less than 250mg/dL
Borderline: 250 - 500 mg/dL
Abnormal: greater than 500 mg/dL