Nausea vomiting
This presentation is the property of its rightful owner.
Sponsored Links
1 / 8

Nausea & Vomiting PowerPoint PPT Presentation


  • 131 Views
  • Uploaded on
  • Presentation posted in: General

Nausea & Vomiting . Nausea & Vomiting . Nausea: inclination to vomit. Vomiting: ejection or expulsion of gastric contents through the mouth. Phases of emesis. Nausea : imminent need to vomit → associated with gastric stasis. Retching : labored movement of abdominal & thoracic muscles.

Download Presentation

Nausea & Vomiting

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Nausea vomiting

Nausea & Vomiting


Nausea vomiting1

Nausea & Vomiting

  • Nausea: inclination to vomit.

  • Vomiting: ejection or expulsion of gastric contents through the mouth.


Phases of emesis

Phases of emesis

  • Nausea: imminent need to vomit → associated with gastric stasis.

  • Retching: labored movement of abdominal & thoracic muscles.

  • Vomiting: forceful expulsion of gastric contents due to GI retroperistalsis.


Nausea vomiting

  • Vomiting is triggered by afferent impulses to the vomiting center found in medulla.

  • Impulses are received from sensory centers such as: chemoreceptor trigger zone (CTZ), cerebral cortex, and visceral afferents from the pharynx & GIT.


Nausea vomiting

  • Afferent impulses are integrated by vomiting center resulting in efferent impulses to the salivation center, respiratory center and pharyngeal, GI and abdominal muscles leading to vomiting.


Nausea vomiting

  • Numerous neurotransmitter receptors are located in: vomiting center, CTZ & GIT. These receptors include:

    • Cholinergic.

    • Histaminic.

    • Dopaminergic.

    • Opiate.

    • Serotonin.

    • Benzodiazepine.

  • Upon stimulation of these receptors → vomiting takes place.


Nausea vomiting

  • Anticipatory NV → NV associated with the administration of noxious, cytotoxic agents or by the anxiety associated with such treatments.

  • NV occur frequently after operative procedures.

  • NV in ♀ 3 times > ♂.

  • Hyperemesis gravidarum → NV during pregnancy.


  • Login