Dilator or dilatator is a medical term with a number of uses, including:

  • A surgical instrument or medical implement used to induce dilation, that is, to expand an opening or passage such as the cervix (see cervical dilator), urethra, esophagus, or vaginal introitus.
  • A pharmacological treatment used to induce dilation, such as cervical dilation, vasodilation, or pupillary dilation.
  • A muscle which causes dilation of a part, for example, the iris dilator muscle or the dilator naris muscle.

Other articles related to "dilator":

Pupillary Response
... constriction (miosis) or dilation (mydriasis, expansion), via relaxation or contraction of the iris dilator muscle ... Dilation Muscular mechanism Relaxation of iris dilator muscle Activation of iris dilator muscle Cause in pupillary light reflex Increased light ...
Rhinoplasty - Anatomy of The Human Nose - The Structures of The Nose
... the dilator muscle group — which includes the dilator naris muscle that expands the nostrils it is in two parts (i) the dilator nasi anterior muscle ...
Iris (anatomy) - General Structure
... muscle (sphincter pupillae), which contracts the pupil in a circular motion, and a set of dilator muscles (dilator pupillae) which pull the iris radially to enlarge the pupil, pulling it in ... This anterior surface projects as the dilator muscles ... It is typically defined as the region where the sphincter muscle and dilator muscle overlap ...
Apraclonidine - Clinical Uses
... In Horner's syndrome, the sympathetic innervation to the pupillary dilator muscle is lost ... The affected pupil is thus miotic and the pupillary dilator responds to denervation by increasing alpha-1 receptors ... to the denervated (and thus hyper-sensitive) pupillary dilator muscle, a super-normal dilatory response is generated in which the pupil dilates to a degree greater than that which would be seen in a non-den ...