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Brachycephalic Obstructive Airway Syndrome

Også kendt som: Brachycephalic Airway Syndrome, Brachycephalic Syndrome, BOAS, BAS, Upper airway obstruction syndrome

DyrlægevurderetCatDogHastighed: HighHvor almindeligt: Common
Compiled from veterinary literature and clinical references· Updated 2026-07-30·How we create this

Kort sagt

Brachycephalic Obstructive Airway Syndrome (BOAS) is a common, inherited condition affecting flat-faced pets. It occurs when compressed facial anatomy restricts airflow, causing severe breathing difficulties, heat intolerance, and digestive issues. Early surgical intervention is highly effective at restoring normal breathing and preventing life-threatening airway collapse.

Anatomical comparison of a normal dog airway versus a compressed brachycephalic airway.
The anatomical differences between a normal canine airway and the crowded, obstructed airway of a brachycephalic dog.

TL;DR. Arvelig luftvejssygdom hos fladnæsede racer: trange luftveje, inspiratorisk anstrengelse, varmeintolerance, kollapsrisiko; ofte kirurgi.

Normal luftvej versus komprimeret brachycefal luftvej.

Hvad er det?

Overskud af bløddelsvæv i kort kranium: stenotiske næsebor, forlænget bløde gane, evt. hypoplastisk trakea; undertryk og sekundær larynxkollaps.

Årsager og risikofaktorer

Medfødt brachycefali. Hund: mops, French Bulldog, English Bulldog, Boxer, Pekingese, Chinese Shar-Pei, Boston Terrier. Kat: perser, himalaya. Værre ved fedme og varme.

Tegn

  • Inspiratorisk anstrengelse (kardinal)
  • Stertor, stridor, snorken, anstrengelses-/varmeintolerance, opkast/regurgitation
  • Akut: cyanose, kollaps, kraftig stridor

A French Bulldog showing signs of severe respiratory distress and open-mouth breathing.
Mundånding og udstrakt tunge tyder på nød.

Diagnostik

Undersøgelse; laryngoskopi under sedation (guld); endoskopi, thoraxrøntgen, evt. blodgas.

An endoscopic view of an elongated soft palate blocking the larynx.
Forlænget blød gane blokerer larynx.

Behandling

Akut: ilt, køling, sedation, Glucocorticoids. Kirurgi: udvidelse af næsebor, stafylektomi, sakkelresektion.

Prognose

God ved tidlig kirurgi; forsigtig ved fremskreden larynxkollaps.

Forebyggelse

Ansvarlig avl, slank vægt, undgå varme, sele (ikke halsbånd).

Hvornår ringe til dyrlæge

Akut: cyanose, kollaps, ukontrollerbar hiven, strakt hals/albuer ud, feber med åndenød.

Kilder

  • Current Techniques in Small Animal Surgery, 5th Edition, p. 404.
  • Small Animal Critical Care Medicine, 2nd Edition, pp. 117, 127.
  • Small Animal Internal Medicine, 5th Edition, p. 289.

My highlights & notes

Tegn og symptomer

increased inspiratory efforts· HallmarkGagging· CommonExcessive drooling· CommonBringing up undigested food· CommonStertor· CommonStertorous breathing· CommonVomiting (throwing up)· CommonTiring easily during activity· Commonheat intolerance· Commonloud breathing sounds· Commonmouth breathing· Commonrestless sleep· Commonsnoring· Commonstridor· CommonBlue gums or tongue (cyanosis)· OccasionalTrouble swallowing (dysphagia)· OccasionalFever· OccasionalExcessive drooling· OccasionalRestlessness· OccasionalFast breathing· Occasionalabnormal posture· OccasionalCollapse (suddenly going down)· OccasionalFainting· Occasional

Racer med højere risiko

Engelsk BulldogFrench BulldogPugBoston TerrierBoxerChinese Shar-PeiHimalayan SheepdogPekingeseSaluki

Hvordan det diagnosticeres

  • Blood gas analysis
  • Bronchoscopy
  • Fluoroscopy
  • Laryngoscopy
  • Retroflexed endoscopy of the nasopharynx
  • Sedated oral examination
  • Thoracic radiographs
  • Upper gastrointestinal flexible endoscopy

Behandlingsmetoder

Glucocorticoids· Line 1

Behandling skal ordineres af en autoriseret dyrlæge. Specifikke doser vises bevidst ikke.

Ofte stillede spørgsmål

What is Brachycephalic Obstructive Airway Syndrome?

Brachycephalic Obstructive Airway Syndrome (BOAS) is a common, inherited condition affecting flat-faced pets. It occurs when compressed facial anatomy restricts airflow, causing severe breathing difficulties, heat intolerance, and digestive issues. Early surgical intervention is highly effective at restoring normal breathing and preventing life-threatening airway collapse.

What are the symptoms of Brachycephalic Obstructive Airway Syndrome?

increased inspiratory efforts、Gagging、Excessive drooling、Bringing up undigested food、Stertor、Stertorous breathing、Vomiting (throwing up)、Tiring easily during activity

How is Brachycephalic Obstructive Airway Syndrome diagnosed?

Blood gas analysis、Bronchoscopy、Fluoroscopy、Laryngoscopy、Retroflexed endoscopy of the nasopharynx、Sedated oral examination

How is Brachycephalic Obstructive Airway Syndrome treated?

Behandling skal ordineres af en autoriseret dyrlæge. Specifikke doser vises bevidst ikke.

Kilder

  1. Current Techniques in Small Animal Surgery, 5th Edition (VetBooks.ir) · p. 404
  2. Small Animal Critical Care Medicine, 2nd Edition (VetBooks.ir) · p. 117
  3. Internal Medicine 5th · p. 289
  4. Current Techniques in Small Animal Surgery, 5th Edition (VetBooks.ir) · p. 404
  5. Internal Medicine 5th · p. 289
  6. Small Animal Critical Care Medicine, 2nd Edition (VetBooks.ir) · p. 127

Artiklen er generel oplysning og erstatter ikke dyrlægeråd. Hvis dyret er sygt, kontakt en dyrlæge.

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