- Gerhardts Schallwechsel (German)
- Gerhardt-Biermer change of note
- Biermer’s change of note
Perkutory phenomenon in larger longitudinal or oval lung caverns containing fluids.
Perkutory phenomenon in larger longitudinal or oval lung caverns containing fluids. Because the secrete mirror is always horisontal, there is a change of percussion note when the patient changes position.
Several authors describe this as being identical to Biermer’s sign, but that is strictly not correct.
- C. J. A. C. Gerhardt:
Lehrbuch der Auscultation und Percussion.
3rd edition, 1876.
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