The sound is not enough: why ultrasound is not optional
During surgery a «clack» is heard as the rib gives way. It is tempting to treat that as the signal the job is done. This study, in 100 patients, tested whether that holds: the sound appeared in 90%, but ultrasound confirmed the monocortical fracture in 100%. Going by ear alone would have left doubt in one in ten.
The problem, stated plainly
The technique aims for a monocortical fracture: breaking only the outer layer of bone. The surgeon needs some way of knowing when that has happened. Sound is the most immediate signal and the easiest to use.
The study asks whether that signal is sufficient. Measured, the answer is no.
What was measured
One hundred Peruvian women aged 18 to 40, treated with the RibXcar technique, with intraoperative ultrasound in every procedure to obtain objective information during surgery.
| Signal | In how many patients |
|---|---|
| «Clack» heard | 90% |
| No «clack» heard | 10% |
| Monocortical fracture confirmed by ultrasound | 100% |
In other words: in 10% of patients the fracture was correctly made but made no sound. A surgeon guided by ear alone would have kept going.
What the study proposes instead
That the endpoint of surgery should not be the sound, but what ultrasound shows. Specifically, three things the ear cannot give you:
- the angulation achieved in the rib
- the loss of bone strength
- the loss of bone continuity, seen directly
So when a patient asks what separates one surgeon from another in this technique, the useful question is whether they use ultrasound during the procedure. Doing it blind and doing it under image guidance are not the same thing, and this study quantifies the gap.
Who signs it
Sole author: Dr. Raúl Manzaneda Cipriani, creator of the technique. This is not an independent study, and that should be said.