A simple experiment which can be used to model the cardiac output measurement using a catheter can be constructed using:
- an aquarium pump
- a temperature probe
- a bucket
- tube with a port for injecting ice water
- syringe and valve
- data collection device such as a CBL.
The pump and tubing is available at most aquarium stores and many
home improvement stores. The syringe and valve port are available
through science supply stores. The temperature probe that comes with
the CBL is sufficient.