Summary: Common Carotid Artery

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1: Part 1
1. The male hit in the face with a softball is showing an immediate response to tissue damage that led to the swelling of the eyelids because there are several blood vessels (arteries and veins) surrounding the ocular tissues such as maxillary artery, superficial branch of temporal artery, palpebral artery, and lacrimal artery tend to vasodilate which increase the blood flow resulting in the swelling of the eyelids.1 Increase in pain(dolor), redness(rubor), heat (calor), swelling (tumor), and loss of function can be experienced by the patient. 1
Ecchymosis, sometimes called raccoon eye,, is a form of hematoma after traumatic injury that is greater than 10mm more than 1cm in diameter.2 Blood extravasates into the thin layer of the …show more content…

The main blood supply to the orbit derives from Internal Carotid Artery (ICA).3 From the head and neck region, Common Carotid Artery divides into ICA and external artery which is extremely important because it directly supplies blood to the cranial nerves, dura, and orbit. 3
Orbit and medial lid are supplied by Facial and Angular artery branch whereas superficial temporal artery supplies the superior and frontal orbit area. 3 When the Ophthalmic vessels are absent, middle meningeal artery supplies the orbit. Occipital, Internal Maxillary, Anterior Deep Temporal, and Infraorbital arteries are some of the additional vessels that supply blood to the orbit as well. …show more content…

The roof of the orbit is composed of two main structures called orbital plate of the frontal bone and part of lesser wing of the sphenoid bone. The floor of the orbit is composed of three main structures called maxillary bone, zygomatic bone, and palatine bone. The medial wall of the orbit is composed of orbital plate of the ethmoid bone, lacrimal bone, maxillary bone, and sphenoid bone. The lateral wall of the orbit is composed of orbital surface of the zygomatic bone and the greater wing of the sphenoid bone. Weakest bones are in the floor and medial wall of the orbit and if pressure is applied through the tissues or the sturdier bones usually causes blowout fractures. In addition, there are numerous 6 ocular muscles and other tissues that surround the orbit.
4. Hyphema is the phenomenon that red blood cells rush into the injured site (blunt trauma) such as ciliary body, iris, and trabecular meshwork (if RBCs are stuck here, it can lead to increase in IOP) where the excessive force tears the blood vessels and leads to accumulation of RBCs that can obscure the vision if not treated

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