nasal sinus

Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to nasal sinus: Paranasal sinusitis

nasal sinus

any one of the numerous cavities in various bones of the skull, lined with ciliated mucous membrane continuous with that of the nasal cavity. The membrane is very sensitive; easily irritated, it may cause swelling that blocks the sinuses. The nasal sinuses are divided into frontal sinuses, ethmoidal air cells, sphenoidal sinuses, and maxillary sinus.


pertaining to the nose.

nasal acariasis
characterized by mild nasal discharge and hyperemia, occasionally severe rhinitis. See also pneumonyssuscaninum.
nasal actinobacillosis
a chronic granulomatous lesion in the nasal cavity of the sheep, causing nasal obstruction and discharge, usually unilaterally.
nasal amyloidosis
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.
nasal breath
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.
nasal catarrh
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.
nasal cavity-sinuses
see paranasal sinuses.
nasal cavity vestibular region
place of transition from skin to respiratory epithelium.
nasal conchae
see Table 10.
nasal cycling
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.
nasal deviation
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.
Enlarge picture
Nasal deviation in a horse. By permission from Knottenbelt DC, Pascoe RR, Diseases and Disorders of the Horse, Saunders, 2003
nasal discharge
may be unilateral or bilateral, serous, purulent, hemorrhagic, or contain food material.
nasal diverticulum
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.
nasal fold
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.
nasal fossa
see nasal fossa.
nasal fundus
the caudal part of the nasal cavity, close to the ethmoid bone.
nasal granuloma
see enzootic nasal granuloma, mycotic nasal granuloma, schistosomanasalis.
nasal hematoma
cause unilateral nasal obstruction; are usually the result of foreign body injury, rarely due to inept passage of a nasal tube or endoscope.
nasal hemorrhage
see epistaxis. Called also rhinorrhagia, nose bleed.
nasal meatus
see nasal cavity.
nasal mites
see nasal acariasis (above).
nasal mucosal inflammation
nasal obstruction
causes respiratory stertor, mouth breathing, and small airstreams from the nostrils. It may be caused by a palpable foreign body.
nasal odor
smell of the nasal breath; may be necrotic, smell of ketones.
nasal passage
see nasal cavity.
nasal plane
see nasal plane.
nasal polyp
see nasal polyp.
progressive nasal hematoma
see progressive nasal hematoma.
nasal schistosomiasis
infection with the blood fluke schistosoma, which is largely asymptomatic but can cause dyspnea, snoring and profuse nasal discharge.
nasal septum
a vertical plate of bone and cartilage covered with mucous membrane that divides the cavity of the nose. See also septum.
nasal sinus
see paranasal sinus.
nasal swab
cotton swab on a stick, passed up the nostril to obtain a sample of exudate and epithelial debris for microbiological or cellular examination.
nasal tube
see nasogastric tube.
nasal turbinates
see nasal conchae (above) and Table 10.
nasal vestibule
the part of the nasal cavity just inside the nostrils that is lined with skin.
nasal wash
flushing of the nasal cavity, usually with sterile saline, to recover cells or infectious agents for cytology or culture.


1. a recess, cavity, or channel, as (a) one in bone or (b) a dilated, valveless channel for venous blood.
2. an abnormal channel or fistula, permitting escape of pus. In common, unqualified usage, the word sinus refers to any of the cavities in the skull that are connected with the nasal cavity—the paranasal sinuses.

anal s's
furrows, with pouchlike recesses at their distal ends, separating the rectal columns; called also anal crypts.
basilar sinus
a dural venous sinus which runs on the floor of the cranial cavity and out through the foramen magnum.
cavernous sinus
an irregularly shaped venous channel between the layers of dura mater of the brain, one on either side of the body of the sphenoid bone and communicating across the midline. Several cranial nerves and, when present, the rete mirabile, course through this sinus.
cavernous sinus syndrome
lesions of the cavernous syndrome, caused by neoplasia or infectious agents, result in a dilated pupil and paralysis of the globe; vision is usually spared.
cerebral sinus
one of the ventricles of the brain.
cervical sinus
a temporary depression in the neck of the embryo containing the branchial arches.
circular sinus
the venous channel encircling the pituitary gland, formed by the two cavernous sinuses and the anterior and posterior intercavernous sinuses.
conchal sinus
cavity of the conchal bone.
coronary sinus
the terminal portion of the great cardiac vein, which lies in the cardiac sulcus between the left atrium and ventricle, and empties into the right atrium.
dermoid sinus, dermal sinus
see dermoid sinus.
dorsal sagittal sinus
a large dural venous sinus located within the falx cerebri.
dura mater venous sinus
large channels for venous blood forming an anastomosing system between the layers of the dura mater of the brain.
ethmoidal sinus
that paranasal sinus consisting of the ethmoidal cells collectively, and communicating with the nasal meatuses.
facial sinus
see malar abscess.
frontal sinus
one of the paired paranasal sinuses in the frontal bone, each communicating with the middle meatus of the ipsilateral nasal cavity.
hair sinus
see sinus hair.
infraorbital sinus
an air-filled recess in the head of birds which lies lateral to the nasal cavity into which it opens.
intercavernous sinus
channels connecting the two cavernous sinuses, one passing anterior and the other posterior to the stalk of the pituitary gland.
interdigitalis sinus
the cutaneous pouch, which lies between the claws of sheep and some other ruminants and whose wall contains apocrine glands, and whose duct surfaces on the skin just above the coronets; it serves as a trail gland.
lymphatic sinus
irregular, tortuous spaces within lymphoid tissues through which lymph flows.
maxillary sinus
one of the paired paranasal sinuses in the body of the maxilla on either side, opening into the middle meatus of the ipsilateral nasal cavity. In the horse it is divided into two compartments that communicate independently with the nasal chambers. All other sinuses of the horse communicate with the nasal chambers via the caudal maxillary sinus.
nasal sinus
see paranasal sinuses (below).
sinus nerve
a branch of the glossopharyngeal nerve; carries the afferent fibers of the stretch receptors in the wall of the carotid sinus.
sinus node
see sinoatrial node.
occipital sinus
a venous sinus between the layers of dura mater, passing along the midline of the cerebellum.
paranasal s's
mucosa-lined air cavities in bones of the skull, communicating with the nasal cavity and including ethmoidal, frontal, maxillary and sphenoidal sinuses.
petrosal sinus (inferior)
a venous channel arising from the cavernous sinus and draining into the internal jugular vein.
petrosal sinus (superior)
one arising from the cavernous sinus and draining into the transverse sinus of the dura mater.
prostatic sinus
the dorsolateral recess between the seminal colliculus and the wall of the urethra.
pulmonary trunk sinus
spaces between the wall of the pulmonary trunk and cusps of the pulmonary valve at its opening from the right ventricle.
red pulp sinus
vascular storage in the spleen into which capillaries empty.
sinus reflex arc
afferent fibers are in the sinus nerve; these connect with the cardioinhibitory and vasomotor centers which control blood pressure and heart rate via sympathetic fibers to blood vessels; provides a route for the sinus reflex which relates pressure in the carotid sinus to the performance of the circulatory system.
renal sinus
a recess in the substance of the kidney, occupied by the renal pelvis, calices, vessels, nerves and fat.
sagittal sinus (inferior)
a small venous sinus of the dura mater of large animals found between the cerebral hemispheres and opening into the straight sinus.
sagittal sinus (superior)
a venous sinus of the dura mater that courses between the cerebral hemispheres and ends in the confluence of sinuses.
scleral venous sinus
sigmoid sinus
a venous sinus of the dura mater on either side, continuous with the straight sinus and draining into the internal jugular vein of the same side.
sphenoidal sinus
one of the paired paranasal sinuses in the body of the sphenoid bone of some species. In the horse it communicates with the nasal cavity via the frontal and caudal maxillary sinuses.
sphenoparietal sinus
one of the venous sinuses of the dura mater, emptying into the cavernous sinus.
splenic sinus
dilated venous channels in the substance of the spleen. See also red pulp sinus (above).
straight sinus
a venous sinus of the dura mater formed by junction of the great cerebral vein and inferior sagittal sinus, and ending in the confluence of sinuses.
tarsal sinus
a space between the calcaneus and talus.
tentorial sinus
straight sinus.
transverse dura mater sinus
a large venous sinus that runs in the attached border of the cerebellar tentorium on either side of the skull.
transverse pericardial sinus
a passage within the pericardial sac, between the aorta and pulmonary trunk cranioventrally, and the left atrium and cranial vena cava dorsally.
tympanic sinus
a deep recess on the medial wall of the middle ear.
urachal sinus
an anomalous closure of the urachal canal in the newborn in which the opening at the umbilicus remains open. The bladder is normal. It is the cause of persistent infection and swelling at the umbilicus in the young animal and may lead to cystitis and pyelonephritis.
urethral s
a small cavity in the glans penis of the horse, above the urethral process; as a recess of the fossa glandis it is usually filled with a small mass (bean) of inspissated smegma.
urogenital sinus
an elongated sac formed by division of the cloaca in the early embryo, which ultimately forms most of the vestibule, urethra and vagina in the female, and some of the urethra in the male.
uterine sinus
venous channels in the wall of the uterus in pregnancy.
uteroplacental sinus
blood spaces between the placenta and uterine sinuses.
venae caval sinus
the posterior portion of the right atrium into which the inferior and the superior vena cava open.
sinus venarum
a chamber which is the greater part of the right atrium into which the great veins discharge.
venous sinus, sinus venosus
1. the common venous receptacle in the heart of the early embryo that receives blood from the umbilical and vitelline veins and from the body via the ducts of Cuvier.
2. sinus of venae cavae.
vertebral sinus
a continuation of part of the common occipital vein in birds; it emerges from the foramen magnum and accompanies the vertebral vein.

Patient discussion about nasal sinus

Q. My 21 year son has chronic sinus issues, I think, due to many high school sports injuries. Help! His ENT has recommended a "nose job" but our insurance will not cover it. Do you know of any holostic, nutritional or homeopathic solutions to keep this under control? When he gets a headache, it shuts him down and normally goes into a migraine.

A. One of the best, most inexpensive, ways to prevent, treat, and generally care for any sinus related problem is with a saline (salt water) sinus rinse. The one I use is called "Neil Med" and can be purchased at Walgreen's for about $15. It has a plastic bottle with pre-measured, pre-packaged salt that is should be mixed with cooled off sterilized (boiled) water. If I get an infection, using 2 or 3 packets to concentrate the solution gives the lavage a bacteriostatic (stuns/partially kills bacteria), not bacteriocidal (kills bacteria) quality. I do not own Neil Med although I wish I did!! The lavage method also washes out any dust, old mucous, you name it. It should be used prior to the use of any nasal steroid like Flonase if treating allergic rhinitis. Good luck!!

Q. I have been having chronic pain in sinus area and behind my eyes, been to ENT who states it is not infection? I wake up with the pain and go to sleep in severe pain. Its all day and all night. Dr insists that its migraine related and allergy related. I have chronic postnasal drainage. It started 4 months ago when I moved into our new house. The pain makes me extremely fatigue and dizzy at times. I have been referred to the eye doctor, a headache specialist and an allergy specialist. Just recently I have had a CT scan and an MRI, as well as xrays of my sinus. Nothing other than a deviated septum and possible allergies from an ENT has been diagnosed. In the mean time I am waiting for the days to come when I can get into see these specialist. Anyone out there have any of the same symptoms?? Need help here. Soooooo sick of the pain.

A. i have chronic sinusitis and can really relate to what you describe. learned to live with the pain...but still, i use various ways to reduce inflammation in my sinuses, i heat the place up before going to sleep, try to avoid eating or drinking cold stuff.
another thing i do is i heat water (80c) then add a special oil i bought in a chinese medicine store , about 5 drops, and inhale the fumes. nettle tea can do wonders too.

Q. sinus infection and Polups and I can't breath through my nose. What can I do?

A. I have used the expresso machine for the steam only and run that through a glass with some vics in it. Helped but the polups are so large now its hard to get any thing through.

More discussions about nasal sinus
References in periodicals archive ?
Specialties include management of nasal sinus disease, snoring and sleep apnea, voice and swallowing disorders, facial plastic and reconstructive surgery, surgical management of thyroid and parathyroid disease, and ear disease including hearing and balance disorders.
It gives 3 dimensional information and also gross information about the temporal bones of skull, which may be some times diseased in association with the para nasal sinus pathology.
Second-hand smoke exposure has been linked in adults to elevated risk of lung cancer, nasal sinus cancer, and breast cancer and to cardiovascular disease, including heart disease.
Heart disease mortality as well as lung and nasal sinus cancers have been causally associated with second-hand smoke exposure.