SHS2 Biomedical Science · Semester 2 Week 9: Diagnostic Device

Lesson notes

Learning Objectives

Indicator: 2.3.1.LI.2 - Identify the components of a diagnostic device and its functions.

By the end of the lesson, learners can:

Identify and name the four main components of a diagnostic medical device (measurand or input, electrode or sensor, signal processing unit, display or recording unit) when shown a real device or diagram.
State the function of each component in their own words, using correct technical terms.
Trace the path of a biological signal (measurand) from the body through each component to the final display on a diagnostic device.
Disassemble and re-assemble a simple diagnostic device safely and correctly, following a step-by-step procedure.
Explain, with at least one example, how the components work together as a system to produce a diagnosis.

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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.2 - Identify the components of a diagnostic device and its functions.
Suggested placement: Semester 2, Week 9 (Week 29 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)

Experiential Learning: With the help of a technician, learners disassemble a diagnostic medical device (e.g., glucometer, ECG monitor etc.) and try to identify the various components under the type of measurand, electrode or sensor, signal processing unit and display or recording unit. The device is then re-assembled as a unit. Learners discuss the functions of the various components and brainstorm how the individual components work together to achieve the overall objective of the device.
Teaching and Learning Resources:
- Online resources
- Articles
- Reports
- Pictures
- Videos
- Charts
- Diagnostic medical device
- Flip chart
- Textbooks
Assessment (2.3.1.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning; Level 4 Extended critical thinking and reasoning.