(n.) A cavity in a bone or other part, either closed or with a narrow opening.
(n.) A dilated vessel or canal.
(n.) A narrow, elongated cavity, in which pus is collected; an elongated abscess with only a small orifice.
(n.) A depression between adjoining lobes.
Example Sentences:
(1) CT scan revealed a small calcified mass in the right maxillary sinus.
(2) Our experience indicates that lateral rhinotomy is a safe, repeatable and cosmetically sound procedure that provides and excellent surgical approach to the nasal cavity and sinuses.
(3) In 3 cases the volume changes in the sinus were measured.
(4) Because of these different direct and indirect actions, a sudden cessation of sinus node activity or sudden AV block may result in the diseased heart in a prolonged and even fatal cardiac standstill, especially if the tolerance to ischemia of other organs (notably the brain) is decreased.
(5) Electromechanic dissociation, sinus bradycardia, nodal rhythm followed by idioventricular rhythm and asystole, were observed following myocardial rupture.
(6) The clinical and roentgenographic features of xanthogranulomatosis bear a close resemblance to those seen in two fibrosclerosing syndromes: sinus histiocytosis with massive lymphadenopathy and retroperitoneal fibrosis.
(7) It is usually associated with a left superior caval vein draining into the coronary sinus and is frequently part of a complex congenital malformation of the heart.
(8) Sinus lining cells give rise to a well defined entity of neoplasia which is proposed to be termed sinus lining cell reticulosarcoma.
(9) The region of the tentorium and straight sinus can occasionally give rise to a vermiform appearance (the "AVM artifact").
(10) The recorded APs were further subdivided into those exhibiting consistent antegrade conduction during sinus rhythm (overt APs: 50 left APs, eight right APs), those exhibiting intermittent antegrade conduction (intermittent APs: six left APs, two right APs), and those exhibiting only retrograde conduction (concealed APs: 33 left APs, two right APs).
(11) A total of 6 cases of sick sinus syndrome were presented, including 2 cases of sinoatrial (SA) block and 4 cases of bradycardia-tachycardia syndrome.
(12) The interobserver variability of these indices is low (r greater than 0.96); reproducibility is good in patients with sinus rhythm but mediocre in atrial fibrillation.
(13) A block of tissue bounded by the ostium of the coronary sinus, the pars membranacea, the septal leaflet of the tricuspid valve and the atrial and ventricular septa is removed.
(14) In order to study cerebrospinal fluid (CSF) absorption across the dural sinus wall, the effect of CSF pressure (recorded from the cisterna magna) on dural venous pressure (recorded from the transverse sinus) was investigated in groups of rats at 2, 10, 20, and 31 days after birth and in adulthood.
(15) All of the above patients had an acute inferior myocardial infarction, and in 10 of the 12 patients with supraventricular arrhythmias and in four of five with sinus dysrhythmias, the origin of the sinus node artery started just after an occluded right coronary or left circumflex artery or was involved in the occlusion.
(16) The normal anatomical position of the point of junction of the superficial cerebral veins with the superior sagittal and transverse sinuses of the rat was studied with an analytical mathematical method.
(17) Most symptoms come from the ciliated airways (nose, paranasal sinuses, and bronchs) and from the middle ear.
(18) In 6 patients electrograms were recorded after sinus rhythm was reestablished, and all showed marked decreases or disappearance of fragmentation.
(19) Direct visualization of the intercavernous sinuses on contrast-enhanced MR images may serve as an ancillary sign for the diagnosis of carotid-cavernous or carotid-dural fistulas near the sella.
(20) Drainage of contrast medium from the maxillary sinus during blowing and sniffing was studied by cine-roentgenography in 11 healthy subjects.
Sinusoid
Definition:
(n.) The curve whose ordinates are proportional to the sines of the abscissas, the equation of the curve being y = a sin x. It is also called the curve of sines.
Example Sentences:
(1) These early hyperplastic lesions revealed stellate-shaped dilated bile canaliculi lined by blebs and abnormally thick elongated microvilli, a decreased number of microvilli on the sinusoidal surface, a marked increase in smooth endoplasmic reticulum, large nucleoli, and bundles of pericanalicular microfilaments.
(2) Time-qualified data series were analysed by means of chronobiological procedures in order to validate the circadian rhythm and to correlate the sinusoidal profiles.
(3) Electrophysiological studies were performed to determine whether or not ethanol potentiates the inhibitory effects of gamma-aminobutyric acid (GABA) on medial vestibular nucleus (MVN) neurons responding to horizontal sinusoidal rotation using alpha-chloralose anesthetized cats.
(4) At 2 h after injury sinusoidal enlargement of the axons was evident.
(5) The structural causes of zone dilatation have been described in Poulsen's disease: sinusoids are empty and dilated, with detritus-filled dilated perisinusoidal spaces.
(6) These parameters can be measured by subjecting the catheter to sinusoidally varying pressures at a wide variety of frequencies to obtain the frequency response.
(7) We studied the effect of symmetric, biphasic sinusoidal electromagnetic fields (EMF) (20 Hz, 6 mT) on the differentiation of normal human skin fibroblasts (HH-8), normal human lung fibroblasts (WI38), and SV40-transformed human lung fibroblasts (WI38SV40) in in vitro cultures.
(8) The threshold functions differ from those observed in patients with scala tympani electrodes, primarily at low sinusoidal frequencies and long pulse widths.
(9) This experimental model excludes the interference of subjective factors, such as erotic stimuli and libido on erection, and it seems that androgen deficiency has a direct effect on the neurophysiology of the erectile tissues resulting in a higher tonus of the detumescence factors, which can be explained by an incomplete relaxation of the sinusoidal smooth muscle.
(10) Anticollagen type III antibody stained hepatocytes and thin connective tissue fibres, while anticollagen type I antibody stained thicker fibres and some sinusoidal cells but not hepatocytes.
(11) If this time waveform is derived from repeated bursts of sinusoidal tone, the second mechanism might be the sole pitch mechanism.
(12) The responses of afferents were further studied using sinusoidal and trapezoidal stimuli aligned as closely as possible with the orientation of their response vector.
(13) Visual response latencies and rise times of X and Y ganglion cells recorded in the optic tract of anaesthetized, paralyzed cats were measured during repeated stimulation with sinusoidal gratings.
(14) The fully developed wreath around the Graafian follicle consists of sinusoidal capillaries.
(15) In cirrhosis, positive staining may be related to the transformation of hepatic sinusoids into true capillaries and thus be a marker of the severity of physiological disturbance in the liver.
(16) The fine structural characteristics and phagocytic properties of peroxidase-positive and peroxidase-negative cells in rat hepatic sinusoids were investigated.
(17) Stimuli used to activate the cells orthodromically were graded innocuous and noxious mechanical stimuli, including sinusoidal vibration and thermal pulses.
(18) The three mesenchymal cell types of the sinusoidal wall possessed the centriole in common within the Golgi complex, but only the fat-storing cell was provided with the single cilium.
(19) We have compared the responses of simple cells to laterally moving sinusoidal gratings and to stationary temporally-modulated gratings.
(20) Subsequently, microvilli on sinusoidal surfaces were disrupted or lost.