(CRL) the longest measurement of the fetus from end to end. Measurement of the CRL of the embryo in the first trimester has been shown to be the most accurate parameter for assessment of gestational age; the measurement is less accurate at the end of the first trimester because of fetal flexion.
An orthopaedic procedure in which the length of a limb, usually a leg, is increased. The bone is surgically divided and slowly stretched in a special frame. The operation is usually done on people with unequal leg lengths as a result of injury or from PARALYSIS in childhood. Exceptionally, it may be done in both legs to help people of short stature.... limb lengthening
A measure of how many days a patient, on average, spends in the hospital. Hence, this measure, when applied to individuals or specific groups of patients, may be an indicator of the severity of illness and resource use. It is often used as a comparison to assess efficiency of resource usage between hospitals.... average length of stay (alos)
n. 1. the part of a tooth normally visible in the mouth and usually covered by enamel. 2. a dental *restoration that covers most or all of the natural crown of a tooth. It may be made of porcelain (sometimes bonded to a metal substructure), gold, a combination of these, or less commonly other materials. Most crowns are like thimbles and are custom made to fit over a trimmed-down tooth. Preformed metal crowns may be used on primary teeth. A post crown is used to restore a tooth when insufficient of the natural crown remains. A post is inserted into the root and the missing centre of the tooth is built up as a core; over it is fitted a thimble-like crown to restore the natural shape of the tooth. *Root canal treatment is required before a post crown can be made.... crown
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