LessonnotesGH

SHS2 Biomedical Science · Semester 2, Week 10

Diagnostic Device

Lesson notes

Learning Objectives

Indicator: 2.3.1.LI.3 - Discuss the bioinstrumentation principles used in the construction of a diagnostic device.

By the end of the lesson, learners can:

  1. Define bioinstrumentation and list at least four basic principles that guide the design of diagnostic devices.
  2. Explain how access to measurement, accuracy, sensitivity and specificity affect the performance of a diagnostic device.
  3. Describe how the principles of calibration and signal processing are applied in a familiar diagnostic device such as a thermometer or blood pressure monitor.
  4. Discuss at least two safety principles that must be considered before a diagnostic device can be used on a patient.
  5. Compare the trade-offs between sensitivity and specificity using examples of common diagnostic tests.

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Curriculum details

Strand
Biomedical Intervention (Strand 3)
Sub-strand
Diagnostic Device (3.1)
Content standard
2.3.1.CS.1 - Demonstrate an understanding of the concepts applied to build diagnostic devices. 2.3.1.LO.1 Describe the importance of technology in clinical diagnosis, the composition of diagnostic medical devices and explain basic principles relating to diagnostic medical device design.
Indicator
2.3.1.LI.3 - Discuss the bioinstrumentation principles used in the construction of a diagnostic device.
Suggested placement
Semester 2, Week 10 (Week 30 of the year)

Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.

Curriculum reference
NaCCA curriculum document, p. 70

Exemplars (from the NaCCA curriculum) 

Initiating Talk for Learning: The teacher starts brainstorming sessions on the requirements of medical device design and construction to be effective for the intended purpose and confirm prescribed safety principles in order not to compromise public safety.
Exploratory Learning: With the aid of realia, models or pictures, learners explore how access to measure and, accuracy, sensitivity and specificity affect the performance of medical devices. Inaccessible measure and may require invasive procedures.
Teaching and Learning Resources:
- Online resources
- Articles
- Reports
- Pictures
- Videos
- Charts
- Diagnostic medical device
- Flip chart
- Textbooks
Assessment (2.3.1.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 2 Skills of conceptual understanding.
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