Search results
Results from the WOW.Com Content Network
The direction of the wound is random rather than straight, and it may have multiple branches. [5] Most often caused by an object with a broken or serrated edge, such as a piece of broken glass or metal, but may also be caused by a blow from a blunt object to tissue with bone immediately behind it.
Numerous small contusions from broken capillaries that occur in grey matter under the cortex are called multiple petechial hemorrhages or multifocal hemorrhagic contusion. [14] Caused by shearing injuries at the time of impact, these contusions occur especially at the junction between grey and white matter and in the upper brain stem , basal ...
Bruise colors vary from red, blue, or almost black, depending on the severity of broken capillaries or blood vessels within the bruise site. Broken venules or arterioles often result in a deep blue or dark red bruise, respectively. Darker colored bruises may result from a more severe bleeding from both blood vessels.
The slow process of reabsorption of hematomas can allow the broken down blood cells and hemoglobin pigment to move in the connective tissue. For example, a patient who injures the base of their thumb might cause a hematoma, which will slowly move all through their finger within a week. Gravity is the main determinant of this process.
[citation needed] Extreme exercise can make capillaries vulnerable, with a breaking point similar to that of collagen. [23] Capillary permeability can be increased by the release of certain cytokines, anaphylatoxins, or other mediators (such as leukotrienes, prostaglandins, histamine, bradykinin, etc.) highly influenced by the immune system. [24]
However, for a given fluid and a fixed pressure drop, data can be compared between capillaries of differing diameter. [5] Fahræus and Lindqvist noticed two unusual features of their data. First, decreased with decreasing capillary radius, R. This decrease was most pronounced for capillary diameters < 0.5mm.
Pharmaceuticals, including the chemotherapy medications gemcitabine and denileukin diftitox, as well as certain interleukins and monoclonal antibodies, can also cause capillary leaks. [ 1 ] [ 2 ] These conditions and factors are sources of secondary capillary leak syndrome, and it is often difficult to diagnose and treat because of its complex ...
Livedo reticularis is a common skin finding consisting of a mottled reticulated vascular pattern that appears as a lace-like purplish discoloration of the skin. [1] The discoloration is caused by reduction in blood flow through the arterioles that supply the cutaneous capillaries, resulting in deoxygenated blood showing as blue discoloration ().