buttonhole

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but·ton·hole

(bŭt'ŏn-hōl),
1. A short straight cut made through the wall of a cavity or canal.
2. The contraction of an orifice down to a narrow slit; that is, the so-called mitral buttonhole in extreme mitral stenosis.
Farlex Partner Medical Dictionary © Farlex 2012

but·ton·hole

(bŭt'ŏn-hōl)
1. A short straight cut made through the wall of a cavity or canal.
2. The contraction of an orifice down to a narrow slit; i.e., the so-called mitral buttonhole in extreme mitral stenosis.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

buttonhole

(bŭt′ŏn-hōl″)
An incision (sometimes inadvertent) into the wall of a cavity or membrane. This term may be applied to surgical procedures on hollow organ systems such as the gastrointestinal, urinary tract, and cardiovascular systems and to some of myocutaneous grafts.
Medical Dictionary, © 2009 Farlex and Partners