Related Experiment Video
Updated: Jun 2, 2026
07:49
Development of an Experimental Setup for the Measurement of the Coefficient of Restitution under Vacuum Conditions
Published on: March 29, 2016
Cupping - is it reproducible? Experiments about factors determining the vacuum
R Huber1, M Emerich, M Braeunig
1Center for Complementqry Medicine, Department of Environmental Health Sciences, University Hospital Freiburg, Breisacher Str. 115b, D-79106 Freiburg, Germany. roman.huber@uniklinik-freiburg.de
Complementary Therapies in Medicine
|May 10, 2011
Summary
Cupping therapy
Area of Science:
- Pain management
- Traditional medicine
- Clinical research
Background:
- Cupping is a traditional pain treatment.
- Clinical studies are investigating cupping.
- Vacuum generation methods vary, impacting reproducibility.
Purpose of the Study:
- To assess the reproducibility of different cupping vacuum methods.
- To compare flame-based and mechanical suction techniques.
- To evaluate the learning curve for cupping practitioners.
Main Methods:
- Study 1: Compared four vacuum methods (lighter flame 2 cm, lighter flame 4 cm, alcohol flame, mechanical suction with balloon) in 50 trials each.
- Vacuum measured using a pressure gauge after cup application to a rubber pad.
- Study 2: Assessed pressure stability over 20 trials for experienced and beginner practitioners using the alcohol flame method.
Main Results:
- All four methods produced consistent pressures within their trials.
- Significant differences in vacuum magnitude were observed between methods.
- Mechanical suction (balloon) demonstrated superior reproducibility (factor of 2 lower standard deviation) compared to flame methods.
- Beginners required 10-20 trials to achieve stable pressures, indicating a learning curve.
Conclusions:
- Cupping reproducibility is achievable with detailed method descriptions.
- Mechanical suction with a balloon offers the best reproducibility.
- Beginner cupping practitioners need practice to achieve consistent results.
Related Concept Videos
01:13Excess Pressure Inside a Drop and a Bubble
The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
01:23Correlation of Experimental Data
Dimensional analysis simplifies complex physical problems and guides experimental investigations, but it does not provide complete solutions. It identifies the dimensionless groups that influence a phenomenon, but experimental data is needed to establish the specific relationships and validate theoretical predictions.
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity, and...
For example, a spherical particle moving through a viscous fluid experiences drag. Dimensional analysis shows that the drag force depends on the particle's diameter, velocity, and...