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The inferior ophthalmic vein passes posterior-ward through the inferior orbit [4] upon the inferior rectus muscle.It passes across (not through) the inferior orbital fissure before either draining into the superior ophthalmic vein within the orbit, or passing through or below the common tendinous ring and exiting the orbit through the superior orbital fissure to empty into the cavernous sinus.
The volume of the blood sample collection is very important in experimental animals. All nonterminal blood collection without replacement of fluids is limited up to 10% of total circulating blood volume in healthy, normal, adult animals on a single occasion and collection may be repeated after three to four weeks.
The superior ophthalmic vein is a vein of the orbit that drains venous blood from structures of the upper orbit. It is formed by the union of the angular vein, and supraorbital vein. It passes backwards within the orbit alongside the ophthalmic artery, then exits the orbit through the superior orbital fissure to drain into the cavernous sinus.
The supraorbital vein is a vein of the forehead.It communicates with the frontal branch of the superficial temporal vein.It passes through the supraorbital notch, and merges with the angular vein to form the superior ophthalmic vein.
The supraorbital artery is a branch of the ophthalmic artery.It passes anteriorly within the orbit to exit the orbit through the supraorbital foramen or notch alongside the supraorbital nerve, splitting into two terminal branches which go on to form anastomoses with arteries of the head.
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The lacrimal artery supplies the lacrimal gland, the eyelids and conjunctiva, and the superior rectus muscle and lateral rectus muscle. [6]Recurrent meningeal branch. A recurrent meningeal branch may sometimes arise from the lacrimal artery to pass backwards, exiting the orbit through the lateral part of the superior orbital fissure to reach the dura mater.
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related to: orbital blood collection