sinus


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Related to sinus: sinus headache, Sinus infection

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 ?
Several studies have come up with different external landmarks for the transverse sinus -the point of insertion of semispinalis capitis muscle, the superior nuchal line (SNL) etc.
(SST) The sphenoid sinus types (It is expressed as conchal type, when the sinus is separated from the sella by thick trabecular bone; it is stated as presellar type, when the sinus is pneumatised without extending posteriorly of the sellar floor and sellar type is when the sinus extends inferiorly and posteriorly of the sella turcica.
Powered instrumentation in functional endoscopic sinus surgery.
These arachnoid villi and granulations are blocked after dural sinus thrombosis leading to the development of papilledema and intracranial hypertension.2 Various invasive and non-invasive imaging tools are available to assess the venous system.
A routine transthoracic echocardiogram showed normal biventricular function; however a well defined echo free space was seen along non-coronary sinus of Valsalva, protruded into the right atrium.
The cavity in the left frontal sinus was evaluated using 70-degree endoscope because of the defect in the frontal sinus septum, the internal part of the sinus was irrigated and aspirated.
Major players operating in the global sinus dilation devices market and included in this report are Acclarent, Inc., Aetna, Inc., Entellus Medical, Inc., KARL STORZ GmbH and Co.
Transthoracic echocardiography demonstrated aortic root dilatation at the level of the sinus of Valsalva (4.9 cm) with an appearance suggestive of right coronary artery ostial dilatation; the proximal ascending aorta measured 4.1 cm.
An endoscopic examination showed that the right uncinate process could not be clearly detected and seemed to adhere to the medial wall of the maxillary sinus (Figure 1(b)).
The addition of the new devices complement the previously FDA cleared Vent-Os device for maxillary sinus dilation.