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Re-evaluation of the cold face test in humans
A K Reyners1, R A Tio, F G Vlutters
1Department of Cardiology, University Hospital of Groningen, The Netherlands. A.K.L.Reyners@int.azg.nl
European Journal of Applied Physiology
|September 14, 2000
Summary
Standardizing the cold face test improves its reliability for assessing autonomic nervous system function. Preventing breathing during the test enhances heart rate response, making it a more effective clinical tool.
Area of Science:
- Physiology
- Autonomic Nervous System Research
Background:
- The cold face test is a clinical method to evaluate the diving reflex.
- Standardization is needed to avoid confounding reflexes like the oculocardiac reflex.
Purpose of the Study:
- To compare and standardize methods for performing the cold face test.
- To assess the reproducibility of the test results.
Main Methods:
- Investigated effects of breathing, bag mass, and diving goggles on cold face test responses.
- Measured blood pressure and heart rate beat-to-beat.
- Used iced-water bags as cold stimulus.
Main Results:
- The cold stimulus was insufficient to elicit the oculocardiac reflex.
- Diving goggles and bag mass did not influence results.
- Preventing breathing enhanced heart rate reduction.
- Test reproducibility was highest with prior stimulus habituation.
Conclusions:
- Standardized cold face test protocols enhance reliability for assessing autonomic nervous system function.
- Preventing breathing during the test optimizes heart rate response.
- Habituation and controlled breathing are recommended for accurate cold face testing.