What is pulsatile vessel?
In fluid dynamics, a flow with periodic variations is known as pulsatile flow, or as Womersley flow. The flow profiles was first derived by John R. Womersley (1907–1958) in his work with blood flow in arteries.
What is pulsatile arterial blood?
The basic assumptions underlying his law are that there is steady, laminar, parallel, flow of a New- tonion liquid in a straight, smooth walled tube. The arterial blood circulation is pulsatile, the fluid is non-Newtonion and the vessels are of complex geometry and elasticity.
Is tinnitus related to aneurysm?
Aneurysm of the internal carotid artery is known as a rare cause of pulsatile tinnitus and, in the main, aneurysms of the petrous portion have been reported as a cause of pulsatile tinnitus.
What does pulsation mean?
Definition of pulsation 1 : rhythmical throbbing or vibrating (as of an artery) also : a single beat or throb. 2 : a periodically recurring alternate increase and decrease of a quantity (such as pressure, volume, or voltage)
What does pulsatile mean in biology?
pulsatile flow. Rhythmic, intermittent propagation of a fluid through a vessel or piping system, in contrast to constant, smooth propagation, which produces laminar flow.
What does pulsatility mean?
beating rhythmically; pulsating or throbbing. Derived forms. pulsatility (ˌpʌlsəˈtɪlɪtɪ )
What is pulsatile in medical terms?
[pul´sah-tīl] characterized by a rhythmic pulsation.
Should I go to the ER for pulsatile tinnitus?
Facial paralysis, severe vertigo, or sudden onset pulsatile tinnitus can indicate a seri- ous intracranial condition. These symptoms may point to cerebrovascular disease or neo- plasm, and should be treated as an otologic emergency.
Is pulsatile tinnitus usually serious?
In pulsatile tinnitus, people hear something resembling their heartbeat in their ear. Pulsatile tinnitus is usually due to a small blood vessel that is coupled by fluid to your ear drum. It is usually nothing serious and also untreatable.
What is the difference between pulsing and pulsating?
As verbs the difference between pulse and pulsate is that pulse is to beat, to throb, to flash while pulsate is to expand and contract rhythmically; to throb or to beat.
What is the throbbing pain?
Throbbing pain is one of the symptoms of a headache. It’s a pulsing, beating sensation that happens over and over again. Anyone can get this type of headache, but it’s most likely to happen to women. Certain conditions like migraines or caffeine withdrawal can trigger a throbbing headache.
What is non pulsatile blood?
When compared to a pulsatile device, a nonpulsatile TAH or VAD needs to produce increased flow and higher mean intravascular pressures to maintain normal organ function. Despite its maintaining normal organ function, nonpulsatile flow does cause alterations in biochemical functions and organ specific blood flow.
What is a pulsatile delivery system?
For example, Ritalin® LA capsule is a pulsatile delivery system that provides immediate release of 50% of the total dose upon oral ingestion, followed by a burst release of the remainding drug after 4 hours.
What are the different types of pulsatile release systems?
A variety of pulsatile release systems have been investigated and successfully applied in commercial products. The fundamental system design is based on the combination of a range of formulation approaches, including single- or multiple-unit immediate-release and delayed release systems discussed previously.
What is pulsatlility and why is it important?
In the nervous system, pulsatlility is observed in oscillatory activity from pacemakers and central pattern generators. Pulsatile activity is critical to the function of many hormones in order to maintain the delicate homeostatic balance necessary for essential life processes, such as development and reproduction.
What does pulsate mean in the English language?
English Language Learners Definition of pulsate : to make strong and regular beats, sounds, flashes, etc. : to be filled with activity or a feeling See the full definition for pulsate in the English Language Learners Dictionary