isthmus of uterus(redirected from orificium internum uteri)
a narrow connection between two larger bodies or parts. adj., adj isth´mian.
isthmus of auditory tube (isthmus of eustachian tube) the narrowest part of the eustachian tube at the junction of its bony and cartilaginous parts.
isthmus of fauces (isthmus fau´cium) the constricted aperture between the cavity of the mouth and the pharynx.
isthmus of rhombencephalon the narrow segment of the fetal brain, forming the plane of separation between the rhombencephalon and cerebrum.
isthmus of thyroid the band of tissue joining the lobes of the thyroid.
isthmus of uterine tube the narrower, thicker-walled portion of the fallopian (uterine) tube closest to the uterus.
isthmus of uterus the constricted part of the uterus between the cervix and the body of the uterus.
isth·mus of u·ter·us[TA]
an elongated constriction at the junction of the body and cervix of the uterus.
isthmus of uterus
A narrowing of the body of the uterus just above the cervix.
See also: isthmus
Guyon,Felix J.C., French surgeon, 1831-1920.
Guyon amputation - amputation above the malleoli, a modification of Syme amputation.
Guyon catheter guide
Guyon exploratory bougie
Guyon isthmus - an elongated constriction at the junction of the body and cervix of the uterus. Synonym(s): isthmus of uterus
Guyon sign - ballottement of the kidney in cases of nephroptosis, especially when there is also a renal tumor.
Guyon ureteral sound
Guyon vessel clamp