What Researchers Did
Researchers used high-speed video and a special hyperbaric chamber to observe and control cavitation bubbles during cataract surgery (phacoemulsification) to determine if they help break down the eye's lens.
What They Found
Cavitation bubbles formed at ultrasonic power levels of 30% or more, but their presence did not affect how well the phacoemulsification procedure worked. When pressure in the hyperbaric chamber increased beyond 2.0 bar (29.1 psi) above atmospheric pressure, cavitation was completely stopped. The study concluded that cavitation plays no role in lens breakdown during cataract surgery; instead, the "jackhammer effect" is the key mechanism.
Canadian Relevance
No direct Canadian connection identified. The study was conducted in Chile and does not cover any Health Canada-recognized hyperbaric oxygen therapy indications.
Study Limitations
The study was conducted at a single center in Chile and evaluated cataract fragments rather than performing the procedure within live human eyes.