What role do macrophages play in wound healing? Macrophages play a critical role in the inflammatory phase. They help to débride the wound through phagocytosis, but, more importantly, they are the primary source of proinflammatory cytokines and growth factors such as the interleukins (IL-1, IL-6, IL-8), PDGF, TGF-β, epidermal growth factor (EGF), fibroblast growth factor …
What roles do platelet derived growth factor and transforming growth factor beta play in wound healing? Platelet-derived growth factor (PDGF) is released initially by platelets in the inflammatory phase during the formation of the initial thrombus. It is an important chemoattractant and activator of macrophages, which arrive to orchestrate wound healing. These macrophages then secrete …
Stages of wound healing What events occur during each of the primary phases of wound healing? Wound healing has three principal phases: inflammatory, proliferative, and remodeling. The inflammatory phase begins at the time of injury and lasts for 24 to 48 hours. This phase begins with hemostasis and leads to inflammation. Platelets form the initial thrombus release …
Abnormal Gait Neurologic evaluation of gait or balance disorders requires an understanding of the underlying physiology and mechanics of gait and balance. Gait & Balance •Gait is a complex action that involves several systems—musculoskeletal, proprioceptive, visual, and vestibular systems The “task to perform” is the task that the subject intends to execute. It can be …
Cerebral AV Malformations Cerebral arteriovenous malformations (AVMs) are congenital vascular lesions that are characterized by blood flow from high-pressure arterial vessels directly into thin-walled veins without passing through an intervening capillary/venule system Synonyms Arteriovenous malformations of the brain AVM Brain AVM Cerebral AV malformations Incidence •Detection rates in large prospective studies range from 1.1 to …
What is the Alvarado score and is it useful in diagnosis? Developed more than 20 years ago, the Alvarado score has found more widespread usage in the past decade. It is a 10-point risk stratification system with points based on findings such as anorexia and right lower quadrant pain, as well as laboratory studies like …
What is the most common tumor of the appendix? Carcinoid is the most common tumor of the appendix, and the appendix is the most common site of carcinoid tumors. Most large series report an incidence of 0.2 to 0.3 in appendectomy specimens. Simple appendectomy is appropriate for distal tumors that are less than 1 cm …