| ball of the thumb |
The thenar eminence of the thumb.
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| ball-valve action |
Intermittent obstruction of a passageway or opening so that the flow of fluid or air is prevented from moving in and out in equal amounts.
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| Ballard tool |
var. Ballard score. [Jeanne Ballard, American neonatologist] A system for estimating newborn gestational age by rating physical and neuromuscular characteristics of maturity. For infants born between 20 and 28 weeks' g
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| balloon atrial septostomy |
The surgical enlargement of an opening between the cardiac atria for palliative relief of congestive heart failure in newborns with certain heart defects. A deflated balloon is inserted into a vein, passed through the f
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| balloon dilatation of the prostate |
A treatment for prostatic hyperplasia.
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