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Questions and Answers
What is the primary goal of a biomedical instrumentation system regarding the physiologic system?
What is the term that describes the ability of a biomedical instrumentation system to distinguish between desired and competing variables?
What is the term that describes the consistency in output for a constant input in a biomedical instrumentation system?
What is the primary function of the sensor in a biomedical instrumentation system?
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What is the term that describes the difference between the true value and the measured value divided by the true value in a biomedical instrumentation system?
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What is the primary goal of the processor in a biomedical instrumentation system?
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What is the term that describes the ability of a biomedical instrumentation system to reproduce the same output for the same input?
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What is the primary function of the display or storage component in a biomedical instrumentation system?
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What is the term that describes the smallest increment that can be measured with certainty in a biomedical instrumentation system?
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What is the primary rule of biomedical instrumentation that ensures the system is easy to use and maintain?
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Study Notes
Laboratory Incubator
- Provides a controlled, contaminant-free environment for safe, reliable work with cell and tissue cultures
- Controls temperature, CO2, and humidity for growth of live organisms
- Common uses: storage and incubation of bacteriological, viral, microbiological, and cellular cultures
Incubator Components
- Outer wall: stainless steel sheets
- Inner wall: aluminum
- Insulated cabinet: enables visualization of the interior
- Control panel: with all switches and indicators to set the desired temperature
- Strong seal: between the door and the cabinet
- Cabinet door: with control panel, thermostat, and air-pump with filters
- HEPA filters: vaporize water to maintain relative humidity inside the chamber
- Electrical part: with CO2 sensor, temperature sensor, humidity sensor, door switch, and control circuit
Preventive Maintenance
- Always wear gloves when handling containers
- Change the water in the humidity pan at least once per week
- Clean the outside of the unit, especially the door handle
- Sterilize inside the incubator often
- Check and calibrate the temperature regularly
- Check all displays & indicator lights working normally
- Check tubing cracks and tight connections
- Replace chamber HEPA Filter
- Ensure water level in water jacket is full
- Check gas or water leaks
- Check operation of all motors, fan, valve, and heaters
BSC Re-certification
- Certification is needed when:
- Certifier should include:
- Test Report
- Installation
- Calibration Date
- Maintenance
- Methods used
- Filter loading
- Date certified
- Changing sample
- Changing rooms
- Certification due date
- Certifiers name, address, and phone number
- Signature
- Certifier should include:
Common Mistakes in Using BSC
- Blocking of air flow
- Placing arms and materials on the grill
- Placing extra high materials
- Unclean room
- Diffuser damage during lifting materials
- Storing cotton materials
Maintenance Tests
- Smoke test
- Leakage test on filters
- Down flow test
- Electrical safety test
Biomedical Instrumentation Systems
- Types: Direct, Indirect, Invasive, Noninvasive, Contact, Remote, Sense, Actuate, Dynamic, Static
- Fundamental Rules:
- Minimum disturbance to physiologic system
- Sensor must be at physiologic variable value
- Processing should be perfect
- Maintain simplicity
Important Instrumentation Terms
- Sensitivity: change in output as a function of a change in input
- Stability: consistency in output for a constant input
- Specificity: ability to distinguish desired variable from other competing variables
- Accuracy: difference between true value and measured value divided by the true value
- Precision: number of distinguishable alternatives from which a given result is selected
- Resolution: smallest increment that can be measured with certainty
- Reproducibility: same output for the same input
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Description
Identify the different parts of a laboratory incubator, including the outer and inner walls, control panel, and thermostat. Learn about the features that ensure a controlled environment, such as the strong seal and air-pump system. Test your knowledge of this essential laboratory equipment.
