| Fontan operation | <procedure> A procedure in which total right atrial or total caval blood flow is channeled directly into the pulmonary artery or into a small right ventricle that serves only as a conduit. The principal congenital malformations for which this operation is useful are tricuspid atresia and single ventricle with pulmonary stenosis. (08 Mar 2000) |
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| fontan procedure | <procedure> A procedure in which total right atrial or total caval blood flow is channeled directly into the pulmonary artery or into a small right ventricle that serves only as a conduit. The principal congenital malformations for which this operation is useful are tricuspid atresia and single ventricle with pulmonary stenosis. (08 Mar 2000) |
| Fontan, Francois | <person> French thoracic surgeon, *1929. See: Fontan procedure, Fontan operation. (05 Mar 2000) |
| Fontana's canal | sinus venosus sclerae |
| Fontana's spaces | Irregularly shaped endothelium-lined spaces within the trabecular reticulum, through which the aqueous filters to reach the sinus venosus sclerae. Synonym: spatia anguli iridocornealis, ciliary canals, Fontana's spaces. (05 Mar 2000) |
| Fontana's stain | <technique> A traditional method for silver-impregnation of treponemes and other spirochetal forms. (05 Mar 2000) |
| Fontana, Arturo | <person> Italian dermatologist, 1873-1950. See: Fontana's stain, Fontana-Masson silver stain, Masson-Fontana ammoniacal silver stain. (05 Mar 2000) |
| Fontana, Felice | <person> Italian physiologist, 1730-1805. See: Fontana's canal, Fontana's spaces. (05 Mar 2000) |
| Fontana-Masson silver stain | <technique> A stain used to demonstrate melanin and argentaffin granules. Synonym: Fontana-Masson silver stain. (05 Mar 2000) |
| fontanel | 1. <medicine> An issue or artificial ulcer for the discharge of humors from the body. 2. <anatomy> One of the membranous intervals between the incompleted angles of the parietal and neighboring bones of a foetal or young skull; so called because it exhibits a rhythmical pulsation. In the human foetus there are six fontanels, of which the anterior, or bregmatic, situated at the junction of the coronal and sagittal sutures, is much the largest, and remains open a considerable time after birth. Origin: F. Fontanelle, prop, a little fountain, fr. Fontaine fountain. See Fountain. Source: Websters Dictionary (01 Mar 1998) |
| fontanelle | <paediatrics> A soft spot, such as one of the membrane covered spaces (fonticuli cranii) remaining in the incompletely ossified skull of a foetus or infant. They are membranous spaces at the juncture of an infant's cranial bones that later ossify. (12 Nov 1997) |
| fonticuli cranii | <anatomy> The membranous intervals between the angles of the cranial bones in the infant; they include the midline anterior fontanel and posterior fontanel, and the paired sphenoidal fontanel and mastoid fontanel. Synonym: fonticuli cranii. (05 Mar 2000) |
| fonticulus | Synonym: fontanel. See: cranial fontanels. Origin: L. Dim. Of fons (font-), fountain, spring (05 Mar 2000) |
| fonticulus anterior | A diamond-shaped membranous interval at the junction of the coronal, sagittal, and metopic sutures where the frontal angles of the parietal bones meet the two ununited halves of the frontal bone. Synonym: fonticulus anterior, bregmatic fontanel, frontal fontanel. (05 Mar 2000) |
| fonticulus anterolateralis | An irregularly shaped interval on either side where the frontal, sphenoidal angle of the parietal, squamous portion of the temporal and greater wing of the sphenoid meet. Synonym: fonticulus sphenoidalis, fonticulus anterolateralis, anterolateral fontanel. (05 Mar 2000) |