sinus

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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 ?
System Patients of Patients value Involved with Patients with Good Involvement Died Prognosis 1 Sigmoid sinus 16 0 16 0.022 2 Superior 21 1 20 0.035 sagittal sinus 3 Transverse 19 3 16 0.603 sinus 4 Deep cortical 1 1 0 0.010 vein
Depressed skull fracture overlying the superior sagittal sinus as a cause of benign intracranial hypertension.
Sagittal T1 imaging (c) revealed heterogeneous signal of the superior sagittal sinus. Postcontrast images were remarkable for a filling defect with direct visualization of the thrombus (d) in the superior sagittal sinus.
Unlike ineffective fetal heart rate monitors, Noninvasix's optoacoustic fetal sensor uses light and sound for direct, real-time monitoring of cerebral venous oxygenation in the fetus' superior sagittal sinus, the main vein that drains the brain.
The dura and sagittal sinus were displaced because of mass effect and sagittal sinus thrombosis was evident (Figure 1A, 1B.
A cranial computed tomographic (CT) scan showed thrombosis of the superior sagittal sinus associated with 3 cerebral hematomas (left frontal and bilateral parieto-occipital) and diffuse cerebral edema with signs of increased intracranial pressure (Figure).
Based on these findings, PRES and superior sagittal sinus thrombosis were considered the differential diagnosis.
AN inquest into the death of a 53-year-old Nicosia woman who was undergoing brain surgery at a private hospital to remove a benign tumour has found indications of medical culpability, it emerged yesterday."Her death was due to heart failure caused by profuse haemorrhage stemming from injury to the Superior Sagittal Sinus (SSS, which runs through the centre of the brain), during the removal of the tumour," Judge Charalambos Charalambous said in his findings.
Transarterial intravenous coil embolization of fistula involving the superior sagittal sinus. SurgNeurol 2001;55: 353-358.