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dilator

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dilator /di·la·tor/ (di-lāt´er)
1. a structure that dilates, or an instrument used to dilate.
2. dilator muscle.
di·la·tor (d-ltr, dl-, d-l-)
n.
1. An instrument or a substance for enlarging a cavity, canal, blood vessel, or opening.
2. A muscle that dilates an orifice or a body part, such as a blood vessel or the pupil of the eye. Also called dilatator.
dilator
[dī′lātər]
Etymology: L, dilatare, to widen
a device for expanding a body opening or cavity. Examples include a tent dilator, consisting of a sponge or bundle of seaweed that expands the cervical os, and a Barnes' bag (dilator), a rubber bag that can be inserted into a body cavity and filled with water to produce pressure on the cavity walls.
dilator [di-la´ter]
a structure (muscle) that dilates, or an instrument used to dilate.
dilator
a structure (muscle) that dilates, or an instrument used to dilate.
dilator pupillae muscle
dilator muscle of the pupil.
dilator
Therapeutics A device used to stretch/enlarge an opening or tubular structure–eg, esophagus, to allow the passage of food. See Bougienage.
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Researchers suggest that the underlying reason for the improved accommodation ability may be due to the positively activated functions of three muscles in the eye: the constrictor pupillae muscle and dilator pupillae muscle working in coordination with the ciliary muscle.
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During his Nobel acceptance speech, Furchgott noted the irony that the prize's namesake Alfred Nobel, celebrated for his work with nitroglycerine and dynamite, had suffered from angina, the insufficient flow of oxygenated blood to the heart for which he was prescribed nitrogylcerine, itself a known blood vessel dilator.
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In blood vessels, phorphorylation modifies the enzyme that produces nitric oxide, called nitric oxide synthase, so that it makes more of the blood vessel dilator.
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