Passage (medicine)

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In medicine , the term passage is used for the passage of substances or a medical instrument through an organ .


  • Gastrointestinal passage: Indigestible substances pass through the entire gastrointestinal tract and are excreted unchanged. This fact is used in the context of X-ray diagnostics with the help of MDP : By giving an X-ray contrast medium (e.g. porridge mixed with barium ), the route of the administered food from the esophagus through the stomach to the intestine can be assessed. This enables an assessment of the swallowing process, stomach filling and digestive peristalsis , among other things .
  • Liver passage ( “first pass” ): An orally ingested drug first passes through the liver via the portal vein circulation. If it is broken down into ineffective metabolites here , it cannot be used orally, but only parenterally .
  • Ascariasis: When infected with roundworms ( Ascaris lumbricoides ), the nematodes pass through the lungs , which leads to breathing difficulties, bloody expectoration and coughing.
  • Dysphagia : This symptom with the main characteristic of a swallowing disorder is an impairment of the passage of food from the mouth via the pharynx into the esophagus.

See also

Individual evidence

  1. ^ Rudolf Häring: Special surgical medical examination. In: Rudolf Häring, Hans Zilch (Hrsg.): Textbook surgery with revision course. (Berlin 1986) 2nd, revised edition. Walter de Gruyter, Berlin / New York 1988, ISBN 3-11-011280-9 , pp. 1–6, here: p. 2.