Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
any of four passages in the nasal cavity formed by the projection of the conchae: inferior nasal meatus [TA] (meatus nasi inferior [TA]), lies below the inferior concha; middle nasal meatus [TA] (meatus nasi medius [TA]), lies between the middle and inferior conchae; superior nasal meatus [TA] (meatus nasi superior [TA]), lies between the superior and middle conchae; common nasal meatus [TA] (meatus nasi communis [TA]) is the part of the nasal cavity between the conchae and the nasal septum.
Synonym(s): meatus nasi [TA]
na·sal me·a·tus(nā'zăl mē-ā'tŭs) [TA]
The three passages (inferior, middle, superior) in the nasal cavity formed by the projection of the conchae.
Synonym(s): meatus nasi.
Synonym(s): meatus nasi.
pertaining to the nose.
characterized by mild nasal discharge and hyperemia, occasionally severe rhinitis. See also pneumonyssuscaninum.
a chronic granulomatous lesion in the nasal cavity of the sheep, causing nasal obstruction and discharge, usually unilaterally.
in horses analogous to AL-amyloidosis in humans; can occur independently of a generalized disease, affecting nasal vestibule and anterior septum and turbinates, with sufficient nodular or diffuse deposits to obstruct the nasal passage.
nasal areae, nasal plane
the polygonal, raised, epidermal markings on the skin of the nasolabial plane of the dog. The pattern of marking is individual to each dog and can be used for identification, similar to the use of fingerprints in humans.
nasal bot fly
infestation causes sneezing and constant nasal discharge. The presence of the flies in the flock causes some insect worry. See also oestrusovis.
flow of the breath from the nostrils as distinct from the breath from the mouth.
nasal breath volume
as determined by holding the palms of the hands in front of the nostrils; diminution or cessation of flow are readily appreciated.
chronic nasal discharge without obvious physical cause. A specific problem of unknown etiology in rabbits, although Bordetella bronchiseptica is thought to be implicated. Manifested by sneezing, constant nasal and ocular discharge and matting of the fur on the insides of the forelimbs. Called also snuffles.
nasal cavity erectile tissue
erectile tissue present only in some patients; usually collapsed.
nasal cavity hemorrhage
nasal cavity obstruction
by mucosal inflammation, foreign body, neoplasm; detected by assessing the nasal breath flow.
nasal cavity olfactory region
located on ethmoturbinates, turbinates and nasal septum; covered by olfactory epithelium including sustentacular, basal and olfactory cells.
nasal cavity respiratory region
covers most of the cavities; covered by respiratory epithelium containing many, mainly serous, glands and carrying cilia.
see paranasal sinuses.
nasal cavity vestibular region
place of transition from skin to respiratory epithelium.
see Table 10.
reciprocal change in degree of congestion between nostrils; when the mucosa of one nasal cavity becomes congested the mucosal congestion of the opposite nasal cavity diminishes.
1. occurs as a congenital deviation of the maxilla and nasal septum and leads to malocclusion of the maxillary teeth.
2. in older animals can result from paranasal sinus cysts or sinonasal neoplasia.
may be unilateral or bilateral, serous, purulent, hemorrhagic, or contain food material.
see nasal diverticulum.
encapsulated nasal hematoma
persistent because of its size; blood is accumulated under respiratory mucosa so as to resemble a polyp. Like a polyp the hematoma obstructs the flow of breath through the nasal cavity.
enzootic nasal adenocarcinoma
of sheep and cattle may occur at a sufficiently high incidence to suggest an infectious cause. Usually unilateral in front of the ethmoid bone.
see facial fold1.
nasal foreign bodies
take the form of grass seeds or sticks poked up while the animal is scratching its muzzle in allergic rhinitis, especially in cattle. Cause sneezing, nasal discharge, inspiratory dyspnea, snoring noise and rubbing of the nose. Foreign bodies may be viewable or palpable.
see nasal fossa.
the caudal part of the nasal cavity, close to the ethmoid bone.
cause unilateral nasal obstruction; are usually the result of foreign body injury, rarely due to inept passage of a nasal tube or endoscope.
see epistaxis. Called also rhinorrhagia, nose bleed.
see nasal cavity.
see nasal acariasis (above).
nasal mucosal inflammation
causes respiratory stertor, mouth breathing, and small airstreams from the nostrils. It may be caused by a palpable foreign body.
smell of the nasal breath; may be necrotic, smell of ketones.
see nasal cavity.
see nasal plane.
see nasal polyp.
progressive nasal hematoma
see progressive nasal hematoma.
infection with the blood fluke schistosoma, which is largely asymptomatic but can cause dyspnea, snoring and profuse nasal discharge.
a vertical plate of bone and cartilage covered with mucous membrane that divides the cavity of the nose. See also septum.
see paranasal sinus.
cotton swab on a stick, passed up the nostril to obtain a sample of exudate and epithelial debris for microbiological or cellular examination.
see nasogastric tube.
see nasal conchae (above) and Table 10.
the part of the nasal cavity just inside the nostrils that is lined with skin.
flushing of the nasal cavity, usually with sterile saline, to recover cells or infectious agents for cytology or culture.