sinus

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Related to Sinuses: Paranasal sinuses

sinus,

cavity or hollow space in the body, usually filled with air or blood. In humans the paranasal sinuses, mucus-lined cavities in the bones of the face, are connected by passageways to the nose and probably help to warm and moisten inhaled air. When drainage from them is blocked, as after a cold, these sinuses often become infected, a condition called sinusitis. The accumulation of pus results in pressure, headaches, pain, and general discomfort. In invertebrates one of the spaces among the muscles and viscera through which blood returns to the heart is also known as a sinus.

sinus

(sÿ -nŭs) A semienclosed break along the borders of a lunar mare or in a scarp. The word is used in the approved name of such a feature on the Moon. (Latin: bay)

Sinus

 

in anatomy, a cavity, protrusion, or long closed channel. In vertebrates (including man), the term “sinus” refers to a channel filled with venous blood in the dura mater. The cavity in some cranial bones is also called a sinus. [23–1297–]

sinus

[′sī·nəs]
(biology)
A cavity, recess, or depression in an organ, tissue, or other part of an animal body.

sinus

1. Anatomy
a. any bodily cavity or hollow space
b. a large channel for venous blood, esp between the brain and the skull
c. any of the air cavities in the cranial bones
2. Pathol a passage leading to a cavity containing pus
3. Botany a small rounded notch between two lobes of a leaf, petal, etc.
4. an irregularly shaped cavity
References in periodicals archive ?
Other findings include attenuation of the nasal septal and sinus trabeculae, and opacified ethmoid sinuses with bulging lateral walls.
Acclarent's comprehensive visualisation capabilities enable surgeons to confidently access, dilate and irrigate targeted sinuses throughout every aspect of Endoscopic Sinus Surgery (ESS) with Balloon Sinuplasty technology and provide their patients with minimally invasive options that have been repeatedly proven safe and effective worldwide.
Sphenoid sinuses behind the ethmoids in the upper region of the nose and behind the eyes
Without the computer, surgeons enter hard-to-reach spots in the sinuses through an incision between the eye and the nose.
However, T1-weighted MRI revealed that sphenoid sinus aeration was absent; also, an area of high signal intensity was seen at the normal sites of the sphenoid sinuses (figure 1, A).
Therefore, anything that causes a swelling in the nose -- an infection or an allergic reaction -- also can affect the sinuses.
3) Sphenoid sinus mucoceles account for only 1% of all mucoceles of the paranasal sinuses.
Ostial dilation of the maxillary sinuses was performed in all enrolled patients and each physician determined if additional surgical procedures such as septoplasty or endoscopic sinus surgery were also needed for a particular patient.
Computed tomography (CT) demonstrated opacification of the frontal sinuses bilaterally (figure, A); the ethmoid, sphenoid, and maxillary sinuses were clear.
Antibiotics, anti-fungals, and anti-inflammatories are nebulized directly into the sinuses using a 3.
Follow-up on this population will continue at six and 12 months to affirm durability of symptom improvement and patency of the sinuses treated with balloon dilation.
During hospitalization, further radiographic evaluation of the cranial venous sinuses by MRV confirmed the diagnosis of sigmoid sinus thrombosis (figure, A).