Clinical measurement SAQs

 

 

To work on

pH questions

thermodilution graph and sites

 

 

 

 

SAQs

22 Questions

 

BP measurement - Oscillometric non-invasive monitor

see 20050606(01)

• Briefly describe the principles and sources of error in the measurement of systemic arterial blood pressure using an automated oscillometric non-invasive monitor. (03A13)
• Briefly describe the principles and sources of error in the measurement of arterial blood pressure using an automated oscillometric non-invasive monitor. (00B2)
• Briefly describe the measurement of blood pressure using an automated oscillometric non-invasive blood pressure monitor. Briefly outline the problems of this kind of monitor. (1996)
• Write short notes on the principles of oscillometry. (1992)
• Write short notes on the ideal properties of a pressure transducer. (1991)

pH measurement

• Briefly describe the measurement of pH in a blood sample using a pH electrode. (01A3)
• How does a fall in temperature influence blood gas solubility and acid base values? (99B1) (98A6)
• Write short notes on measurement of acid base disturbances. (1991)

Cardiac output measurement

Explain how cardiac output is measured using a thermodilution technique. (00A1)

Oxygen measurement

See 200500606(02)-(03)

• Describe how the partial pressure of oxygen in a blood sample is measured using a Clark electrode. (99B7)

 

• Briefly discuss the factors which influence the measurement of oxygen saturation using a pulse oximeter. (1993)

Carbon dioxide measurement

• Explain briefly the causes of differences between measured end tidal and arterial partial pressures of carbon dioxide. (1996)
• Write short notes on principles of measurement of end tidal carbon dioxide tension. (1992) (1990)

Humidity measurement

 

• Compare 2 methods of measuring humidity. (1994)

Heat vs Temperature

• Differentiate between the terms 'heat' and 'temperature'. Explain briefly the principles of a mercury thermometer, indicating its advantages and disadvantages. (99A5)
• Briefly differentiate between the terms 'heat' and 'temperature'. Explain briefly the principles of a thermistor indicating its advantages and disadvantages. (95B7)

Gas flow

• Briefly describe the differences between laminar and turbulent flow. List the factors that increase the probability of turbulent flow. (97B6)

Ultrasound

• Explain the physical principles of ultrasound imaging. (02B14) (98B4)
• Briefly explain the principles of Doppler ultrasound used to measure cardiac output using echocardiography. (98A4)

Pneumotachograph

• Outline the principles of a pneumotachograph. What factors affect the accuracy of this device? (02A7)
• Outline the principles of the pneumotachograph. What factors affect the accuracy of this device? (95A5)

Others

• Write short notes on exponential functions. (1991)