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percussion (per-kush´un)

1. A diagnostic procedure designed to determine the density of a part by the sound produced by tapping the surface with the finger or a plessor; performed primarily over the chest to determine presence of normal air content in the lungs and over the abdomen to evaluate air in the loops of intestine. 2. A form of massage, consisting of repeated blows or taps of varying force. [L. percussio, fr. per-cutio, pp. -cussus, to beat, fr. quatio, to shake, beat]
auscultatory p. auscultation of the chest or other part at the same time that p. is made, to aid in hearing the sound made by p.
bimanual p. immediate p. in which the finger of one hand taps the other hand; a form of mediate p.
clavicular p. p., usually direct, along the entire clavicle to demonstrate dullness, particularly in apical pulmonary tuberculosis.
deep p. heavy p. to obtain information about deeply situated organs or structures.
direct p. immediate p
finger p. p. in which a finger of one hand is used as a plessimeter and one of the other hand as a plessor.
immediate p. the striking of the part under examination directly with the finger or a plessor, without the intervention of another finger or p;
mediate p. p. effected by the intervention of a finger or a plessimeter between the striking finger or plessor and the part percussed.
Murphy's p. examination for dullness by striking the chest wall directly with the fingertips of one hand successively, beginning with the fifth finger.piano p;
palpatory p. finger p. in which attention is focused upon the resistance and reverberation of the tissues under the finger as well as upon the sound elicited.plessesthesia;
piano p. Murphy's p
threshold p. p. effected by means of a glass rod as a plessimeter, the rod being inclined to the wall of the chest or abdomen and touching it only by one extremity.


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