MOSBY’S CANADIAN MANUAL OF DIAGNOSTIC
AND LABORATORY TESTS
2nd Edition — Enhanced Original Study Guide &
Practice Workbook
Diagnostics • laboratory testing • specimen integrity • nursing priorities
Source basis: the public Stuvia preview for the 134-page listing. Visible material includes IV iodinated contrast, ALP, Bence-Jones proteins, diverticulitis
imaging, BUN/creatinine, EGD, stress testing, imaging sequence, and cardiac-catheterization aftercare. This guide is independently written and does not
reproduce the paid test bank.
Disclaimer: original study material; not the official publisher test bank/textbook and not a guarantee of exam content or grades.
Original educational study guide • Not an official test bank Page 1
, 1. Master Exam Map
Domain Master Question focus
Preparation Fasting, timing, medications, hydration, positioning Best instruction
Specimens Tube/container, volume, labeling, transport Preanalytic error
Blood CBC, renal, liver, electrolytes, cardiac/endocrine Pattern recognition
Urine UA, culture, timed urine, protein/ketones Collection and interpretation
Imaging X-ray, CT, MRI, ultrasound, nuclear Contrast/safety/sequence
Endoscopy EGD, colonoscopy, bronchoscopy Preparation/complications
Fluids CSF, pleural, synovial, ascitic Pattern interpretation
Electrodiagnostics ECG, stress testing, EEG Indication/contraindication
Safety Sedation, contrast, radiation, bleeding Priority action
Diagnostic reasoning sequence
Why? → Prepare? → What invalidates it? → What can harm the patient? → What requires immediate action?
2. Specimen Collection & Preparation
• Verify identity and match the specimen label before leaving the bedside.
• Know fasting, medication, diet, hydration, timing and positioning requirements.
• Use the correct tube/additive/container/preservative and required volume.
• Prevent contamination; cultures require meticulous collection.
• Transport promptly under required temperature and light conditions.
• Document timing and relevant factors that can affect interpretation.
Error Why it matters Prevention
Hemolysis May distort potassium and other analytes Proper venipuncture; avoid force
Wrong tube Incorrect additive or ratio Know test/container
Contamination False-positive culture Correct cleansing/collection
Delay Cellular/metabolic change Prompt transport
Wrong timing Invalid timed study Exact start/stop
Low volume Unreliable blood/additive ratio Fill correctly
3. Core Blood-Lab Reasoning
BUN vs creatinine
BUN reflects urea production/excretion and is influenced by renal function, hydration, protein balance, GI bleeding and hepatic
function. Creatinine is more closely related to filtration and muscle production. Neither is a stand-alone diagnosis.
Low BUN: may occur with overhydration, low protein intake/negative nitrogen balance or severe liver dysfunction. Rising
creatinine: raises concern for reduced filtration and should be interpreted with trend and clinical context.
ALP and Bence-Jones proteins
ALP has bone and hepatobiliary sources; increased bone turnover can raise it. Bence-Jones proteins are immunoglobulin light
chains classically associated with plasma-cell disorders such as multiple myeloma.
Electrolyte pattern recognition
Finding Common considerations Priority
Low Na+ Water excess, sodium loss, drugs/endocrine causes Neurologic status
Original educational study guide • Not an official test bank Page 2
AND LABORATORY TESTS
2nd Edition — Enhanced Original Study Guide &
Practice Workbook
Diagnostics • laboratory testing • specimen integrity • nursing priorities
Source basis: the public Stuvia preview for the 134-page listing. Visible material includes IV iodinated contrast, ALP, Bence-Jones proteins, diverticulitis
imaging, BUN/creatinine, EGD, stress testing, imaging sequence, and cardiac-catheterization aftercare. This guide is independently written and does not
reproduce the paid test bank.
Disclaimer: original study material; not the official publisher test bank/textbook and not a guarantee of exam content or grades.
Original educational study guide • Not an official test bank Page 1
, 1. Master Exam Map
Domain Master Question focus
Preparation Fasting, timing, medications, hydration, positioning Best instruction
Specimens Tube/container, volume, labeling, transport Preanalytic error
Blood CBC, renal, liver, electrolytes, cardiac/endocrine Pattern recognition
Urine UA, culture, timed urine, protein/ketones Collection and interpretation
Imaging X-ray, CT, MRI, ultrasound, nuclear Contrast/safety/sequence
Endoscopy EGD, colonoscopy, bronchoscopy Preparation/complications
Fluids CSF, pleural, synovial, ascitic Pattern interpretation
Electrodiagnostics ECG, stress testing, EEG Indication/contraindication
Safety Sedation, contrast, radiation, bleeding Priority action
Diagnostic reasoning sequence
Why? → Prepare? → What invalidates it? → What can harm the patient? → What requires immediate action?
2. Specimen Collection & Preparation
• Verify identity and match the specimen label before leaving the bedside.
• Know fasting, medication, diet, hydration, timing and positioning requirements.
• Use the correct tube/additive/container/preservative and required volume.
• Prevent contamination; cultures require meticulous collection.
• Transport promptly under required temperature and light conditions.
• Document timing and relevant factors that can affect interpretation.
Error Why it matters Prevention
Hemolysis May distort potassium and other analytes Proper venipuncture; avoid force
Wrong tube Incorrect additive or ratio Know test/container
Contamination False-positive culture Correct cleansing/collection
Delay Cellular/metabolic change Prompt transport
Wrong timing Invalid timed study Exact start/stop
Low volume Unreliable blood/additive ratio Fill correctly
3. Core Blood-Lab Reasoning
BUN vs creatinine
BUN reflects urea production/excretion and is influenced by renal function, hydration, protein balance, GI bleeding and hepatic
function. Creatinine is more closely related to filtration and muscle production. Neither is a stand-alone diagnosis.
Low BUN: may occur with overhydration, low protein intake/negative nitrogen balance or severe liver dysfunction. Rising
creatinine: raises concern for reduced filtration and should be interpreted with trend and clinical context.
ALP and Bence-Jones proteins
ALP has bone and hepatobiliary sources; increased bone turnover can raise it. Bence-Jones proteins are immunoglobulin light
chains classically associated with plasma-cell disorders such as multiple myeloma.
Electrolyte pattern recognition
Finding Common considerations Priority
Low Na+ Water excess, sodium loss, drugs/endocrine causes Neurologic status
Original educational study guide • Not an official test bank Page 2
