How do you explain to patients what the cracking/popping sound is when you manipulate them? How about when they stretch or move on their own and get their own audible cracks?
You can find anything on youtube, while looking for recent articles on Cavitation, I found a great youtube video showing a the cavitation in real-time. I normally describe the cavitation as a negative pressure within the fluid filled joint capsule. The negative pressure forms a gas bubble, which is normally diffused into the synovial fluid, then pops from the movement or distraction of the two surfaces coming apart. I usually use my two hands clapsed together and pull them apart to create a suction effect. I may now just show them this video instead!
Key Points
- cavitation is normal
- you can only get it with movement
- it doesn't put anything back into place
- the decrease in tone/tension and increase in mobility should be reinforced continuously until it's the new normal
- patient's don't need it done to themselves, they can accomplish the same novel input with repeated end range loading
Real-Time Visualization of Joint Cavitation
Reference
Real-Time Visualization of Joint Cavitation. Gregory N. Kawchuk et al (2015), PLoS ONE http://journals.plos.org/plosone/arti...
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