MEDIVEERSETHE PRACTICAL HUB
Measuring chamber: located on the reference instrument. Compare its shape and position with the apparatus used in your practical.
Zoom in, then drag to inspect. Keyboard: + / − to zoom, arrows to pan, 0 to reset. Tap the numbered markers to explore parts.
Spirometer — reference view
Image: Raimond Spekking · Source / original · CC BY-SA 4.0Resized and converted to WebP; original colours retained.
Spirometer
Spirometry apparatus · pulmonary function recorder
What is its use?
Measures exhaled or inhaled volume and flow to assess ventilatory function.
Tap a number to locate its part. Zoom, drag or use full screen to inspect the reference. Models and graduations can differ; check the actual apparatus used in your laboratory.
How to recognise it.
- A chamber or sensor measures respiratory volume or flow
- Modern systems usually use a mouthpiece and flow sensor
- The reference shows a historical volume-measuring instrument with an outlet port
Basic spirometry cannot directly measure residual volume or capacities that include it. A peak flow meter gives a much more limited flow measure.
Point them out.
Choose a part to bring its numbered marker into view.
The science behind the reading.
Volume is measured directly or calculated by integrating airflow over time; accurate technique and quality control are essential.
Think first. Then reveal.
Explain your answer aloud before opening it.
01What is FEV₁?+
The volume expired in the first second of a forced expiratory manoeuvre.
02What is FVC?+
The volume forcibly exhaled after a maximal inspiration under the specified spirometry manoeuvre.
03Can spirometry directly measure residual volume?+
No. Other lung-volume methods are needed.
04Why are repeatable attempts important?+
They help assess effort, technique and reliability of the measurement.
Read the references.
Teaching and clinical references are listed here. Image attribution and licence appear below the viewer.