Dilator

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Hegar dilator set in sizes 4 to 17 mm (from right)

A dilator ( Latin dilator , reamer, expanders 'also Bougie , French bougie =, wax candle', colloquially short dilator ) is a medical device for widening ( dilatation ) of existing body openings (z. B. urethra , anus , esophagus , vagina , Cervix ) or artificial accesses such as the puncture canal for the placement of a central venous catheter or a puncture tracheotomy .

Structure and use

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Pratt dilators in sizes 13 to 43 Ch (from left)
Seldinger set with dilator (blue) at the lower edge of the picture

Dilators for bougienage are usually made of metal, slightly curved rods with rounded tips in various thicknesses ranging from 4 to 20  Ch .

A distinction is made between different versions:

  • Bakes - the tip is shaped like different sized buds
  • Clutton - J shape
  • van Buren - J-shape
  • Hank - small thickening in the first third
  • Hegar - slightly curved, s. Illustration
  • Pratt - especially long, s. Illustration
  • Sim - longer than usual and quite thin and pliable

The in the context of z. B. vascular punctures (z. B. pulmonary artery catheter ) used dilators are disposable products made of plastic with a size of about 14  G . Dilators used in puncture tracheotomy are significantly thicker, sometimes horn-shaped, so that the dilatation can be carried out without changing the dilator. In both cases, the Seldinger technique is commonly used.

Metal dilators are also used improperly, as they are not harmless, in the context of clinical eroticism.

See also

Individual evidence

  1. ↑ dilator. Duden , accessed on January 2, 2016 .
  2. ↑ dilator. Wissen.de , accessed on January 2, 2016 .