John Hay
John Hay Biomedical
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Principles of Biomedical Technology (Principles of Biomedical Science)
Unit 2: Unit 2.1 Clinical DataPBS 2.1Biotechnology Research and Experiments

Interpret Bloodwork Against Normal Ranges

Use patient evidence to interpret bloodwork against normal ranges without overclaiming.

Builds on (2 levels back)inferred · high confidence
  • Sign vs. symptom: Clinical data mixes measured findings with patient-reported history.
  • Normal range comparison: Students need a reference range or baseline to tell whether a value is concerning.

Prerequisites are inferred: pending teacher review.

Re-learn the skill with worked practice and clear examples.

Use patient evidence to interpret bloodwork against normal ranges without overclaiming.

Step 1: Learn the key
Compare each bloodwork value to its [blank] range before calling it high, low, or normal.
Blood testPatientReference
Glucose142 mg/dL70-99 fasting
LDL cholesterol170 mg/dLunder 100
Hemoglobin14 g/dL12-16
Bloodwork reference range table
Step 2: Use the model
Read the figure, table, control, range, or protocol before choosing an answer.
Step 3: Name the limit
Say what the evidence can support and what it cannot prove yet.
Practice

Use the bloodwork table. Which value is outside its reference range?

Reviewed
Blood testPatientReference
Glucose142 mg/dL70-99 fasting
LDL cholesterol170 mg/dLunder 100
Hemoglobin14 g/dL12-16
Bloodwork reference range table
  1. A.LDL cholesterol 170 mg/dL
  2. B.Hemoglobin 14 g/dL
  3. C.The test name
  4. D.Reference range label
Show the worked solution ▾

Answer: A. LDL cholesterol 170 mg/dL

  1. Step 1: Read the shown evidence: Use the table or figure, not outside memory.
  2. Step 2: Compare to the rule: The correct choice matches the listed evidence.

Why it's right: LDL 170 is above the under-100 reference.

Why the others miss:
  • B: This does not match the strongest evidence.
  • C: This ignores the comparison.
  • D: Length is not evidence.

Aligned to Biotechnology Research and Experiments · reading level ~grade 9

Where you'd see this
  • In Unit 2.1 Clinical Data, this skill turns class evidence into a result another person can check.
Careers that use this
Physician Assistant: Uses interpret bloodwork against normal ranges to make a decision from evidence without overclaiming.
Video library
Watch: Interpret Bloodwork Against Normal Ranges
Complete Blood Count (CBC) Test Results Interpretation w/ Differential Nursing NCLEX
RegisteredNurseRN · 11:54
Guided notes

Fill these in as you work through the lesson.

Big idea: Use patient evidence to interpret bloodwork against normal ranges without overclaiming.
Key terms: write the meaning
  • Reference range (expected lab values):  
  • Glucose (blood sugar):  
  • LDL cholesterol (blood fat linked to heart risk):  
  • Flag (mark for outside-range result):  
The rule

Compare each bloodwork value to its   range before calling it high, low, or normal.

Check yourself
  1. What value or patient statement is shown? 
  2. What reference, rule, or comparison should be used? 
  3. What should happen next? 
Work one example

Use the case table to practice interpret bloodwork against normal ranges and write one justified next step.