ocular blood supply and circulation ppt to pdf

Ocular Blood Supply And Circulation Ppt To Pdf

File Name: ocular blood supply and circulation ppt to .zip
Size: 18739Kb
Published: 23.04.2021

The ophthalmic artery OA is the first branch of the internal carotid artery distal to the cavernous sinus. Branches of the OA supply all the structures in the orbit as well as some structures in the nose, face and meninges.

The aorta is the largest artery in the body, initially being an inch wide in diameter. It receives the cardiac output from the left ventricle and supplies the body with oxygenated blood via the systemic circulation. The aorta can be divided into four sections: the ascending aorta , the aortic arch , the thoracic descending aorta and the abdominal aorta. In this article we will look at the anatomy of the aorta — its anatomical course, branches and clinical correlations.

Ophthalmic artery

This website uses cookies to deliver some of our products and services as well as for analytics and to provide you a more personalized experience. Click here to learn more. By continuing to use this site, you agree to our use of cookies. We've also updated our Privacy Notice. Click here to see what's new. FDOCT does not need reference arm scanning and records one full depth and Doppler profile in parallel. The fundus camera allows simultaneous view for selection of the region of interest.

Download PDF. Central retinal artery occlusion CRAO is an ocular emergency. CRAO is the ocular analogue of a cerebral stroke—and, as such, the clinical approach and management are relatively similar to the management of stroke, in which clinicians treat the acute event, identify the site of vascular occlusion, and try to prevent further occurrences. Both sets of arteries arise from the ophthalmic artery, the first branch of the internal carotid artery just as it exits the cavernous sinus. The ophthalmic artery passes through the optic canal inferolaterally to the optic nerve. It supplies blood to part or all of the fovea. Other causes of nonarteritic retinal artery occlusion include cardiogenic embolism, hematological conditions sickle cell disease, hypercoagulable states, leukemia, lymphoma, etc.

Ocular blood supply and circulation ppt to pdf

This website uses cookies to deliver some of our products and services as well as for analytics and to provide you a more personalized experience. Click here to learn more. By continuing to use this site, you agree to our use of cookies. We've also updated our Privacy Notice. Click here to see what's new. Laser Doppler holography was introduced as a full-field imaging technique to measure blood flow in the retina and choroid with an as yet unrivaled temporal resolution. We here investigate separating the different contributions to the power Doppler signal in order to isolate the flow waveforms of vessels in the posterior pole of the human eye.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. Published on Mar 15, SlideShare Explore Search You.

The main function of ocular blood flow is to supply sufficient oxygen and nutrients to the eye. Local blood vessels resistance regulates overall blood distribution to the eye and can vary rapidly over time depending on ocular need. Under normal conditions, the relation between blood flow and perfusion pressure in the eye is autoregulated. Basically, autoregulation is a capacity to maintain a relatively constant level of blood flow in the presence of changes in ocular perfusion pressure and varied metabolic demand. In addition, ocular blood flow dysregulation has been demonstrated as an independent risk factor to many ocular diseases. For instance, ocular perfusion pressure plays key role in the progression of retinopathy such as glaucoma and diabetic retinopathy.


ophthalmic artery. 2. central retinal artery 3. ciliary arteries (on each side of the optic nerve). These vessels divide into 2 long posterior ciliary.


Optics Express

Eye 4, In vivo Choroidal Circulation and its Watershed Zones mental blood flow and they behave as end-arteries. The constant k depends upon L and r[3]. The mean ocular PP driving blood through the eye is the mean blood pressure in the ophthalmic artery. Studies have shown that vascular impairment plays an important role in the etiology and pathogenesis of various ocular diseases including glaucoma, age-related macular degeneration, diabetic retinopathy, and retinal venous occlusive disease. Thus, qualitative and quantitative assessment of ocular blood flow BF is a topic of interest for early disease detection, diagnosis, and management.

Ocular Blood Flow Autoregulation Mechanisms and Methods

Arteries of the Body

Your circulatory system contains a vast network of blood vessels, which includes arteries, veins , and capillaries. According to the Cleveland Clinic, if you laid out all of the blood vessels of the body they would be about 60, miles long! Arteries are a type of blood vessel. They work to carry blood away from the heart. In contrast, veins carry blood back to the heart. Because arteries are moving blood being pumped out by the heart, the walls of arteries are thicker and more elastic than those of veins. This is because the blood in the arteries is passing through with a higher pressure than in veins.

Studies have shown that vascular impairment plays an important role in the etiology and pathogenesis of various ocular diseases including glaucoma, age-related macular degeneration, diabetic retinopathy, and retinal venous occlusive disease. Thus, qualitative and quantitative assessment of ocular blood flow BF is a topic of interest for early disease detection, diagnosis, and management. Owing to the rapid improvement in technology, there are several invasive and noninvasive techniques available for evaluating ocular BF, with each of these techniques having their own limitations and advantages. This article reviews these important techniques, with a particular focus on Doppler Fourier domain optical coherence tomography OCT and OCT-angiography.


Ocular blood supply and circulation ppt to pdf. Vascular supply and drainage. The arterial input to the eye is provided by several branches from the ophthalmic​.


Journal of Ophthalmology

Танкадо, задыхаясь и не в силах произнести ни звука, в последней отчаянной надежде посмотрел на тучного господина. Пожилой человек вдруг поднялся и куда-то побежал, видимо, вызвать скорую. Танкадо явно терял последние силы, но по-прежнему совал кольцо прямо в лицо тучному господину. Тот протянул руку, взял Танкадо за запястье, поддерживая остававшуюся на весу руку умирающего. Танкадо посмотрел вверх, на свои пальцы, на кольцо, а затем, умоляюще, - на тучного господина. Это была предсмертная мольба.

На перекрестке он свернул вправо, улица стала пошире. Со всех сторон открывались ворота, и люди вливались в поток. Колокола звонили где-то совсем рядом, очень громко. Беккер чувствовал жжение в боку, но кровотечение прекратилось. Он старался двигаться быстрее, знал, что где-то позади идет человек с пистолетом. Беккер смешался с толпой прихожан и шел с низко опущенной головой.

Он посмотрелся в зеркало. Вид был такой, будто он не переставая рыдал несколько дней подряд. Беккер вытер лицо рукавом пиджака, и тут его осенило. От волнений и переживаний он совсем забыл, где находится. Он же в аэропорту.

Но когда ТРАНСТЕКСТ расшифровал эти потоки информации, аналитики тут же увидели в них синхронизированный через Интернет отсчет времени. Устройства были обнаружены и удалены за целых три часа до намеченного срока взрыва. Сьюзан знала, что без ТРАНСТЕКСТА агентство беспомощно перед современным электронным терроризмом. Она взглянула на работающий монитор. Он по-прежнему показывал время, превышающее пятнадцать часов.

 Никакого вируса. Выслушай меня внимательно, - попросил Стратмор. Сьюзан была ошеломлена. ТРАНСТЕКСТ еще никогда не сталкивался с шифром, который не мог бы взломать менее чем за один час. Обычно же открытый текст поступал на принтер Стратмора за считанные минуты.

2 comments

Madonna F.

Real world algorithms a beginners guide mit press pdf khalid bin waleed book in urdu pdf free download

REPLY

Petronila C.

Concepts and comments 4 pdf free download the power of focus jack canfield free pdf

REPLY

Leave a comment

it’s easy to post a comment

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>