Auscultation and percussion : together with the other methods of physical examination of the chest / by Samuel Gee.

  • Samuel Gee
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Auscultation and percussion : together with the other methods of physical examination of the chest / by Samuel Gee. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    Article III.—Murmurs ix General. A murmur is a sound produced by the flow of fluid, liquid or gaseous, along a tube. Fluid flowing, however swiftly, along a tube of equal caliber throughout, produces no sound. The condition necessary to the production of an onward murmur is a sudden change in the caliber of the tube. I. Onward MuR.Mua.—A jet of fluid flowing swiftly enough, out of a narrow orifice into a wider space, is called a fluid vein.^ The mole- cules of a fluid vein are agitated by movements which cause the vein to vibrate, and which arc productive of sound. The loudness of the sound depends upon the swiftness of the flow: the quality of the fluid, and the size of the orifice are of import only inasmuch as they exert an in- fluence upon the swiftness of the flow. The sound is carried farthest in the direction of the flow, hence the name onward murmur. II. Backward ^[urmur.—Fluid flowing, how- ever swiftly, from a wider into a narrower S])ace, ' Felix Sivart : Annales de cliiinie et de pliy.sique : 2ii'l series, vol. oO. p. 3^7. Taris, 1833. - CliauYcau : Gazette med. de Paris. 18r»8, pp. 247, ct s'lq. i
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