Ad
related to: jkr model of contact pressure ulcer symptoms checklist
Search results
Results from the WOW.Com Content Network
Schematic of contact area for the JKR model JKR test with a rigid bead on a deformable planar material: complete cycle. To incorporate the effect of adhesion in Hertzian contact, Johnson, Kendall, and Roberts [5] formulated the JKR theory of adhesive contact using a balance between the stored elastic energy and the loss in surface energy. The ...
Pressure ulcers can trigger other ailments, cause considerable suffering, and can be expensive to treat. Some complications include autonomic dysreflexia, bladder distension, bone infection, pyarthrosis, sepsis, amyloidosis, anemia, urethral fistula, gangrene and very rarely malignant transformation (Marjolin's ulcer – secondary carcinomas in chronic wounds).
[31] [32] Pressure ulcers are caused by ischemia that occurs when pressure on the tissue is greater than the pressure in capillaries, and thus restricts blood flow into the area. [30] Muscle tissue, which needs more oxygen and nutrients than skin does, shows the worst effects from prolonged pressure. [ 32 ]
Finally there are the processes at the contact interface: compression and adhesion in the direction perpendicular to the interface, and friction and micro-slip in the tangential directions. The last aspect is the primary concern of contact mechanics. It is described in terms of so-called contact conditions. For the direction perpendicular to ...
The Braden Scale for Predicting Pressure Ulcer Risk, is a tool that was developed in 1987 by Barbara Braden and Nancy Bergstrom. [1] The purpose of the scale is to help health professionals, especially nurses, assess a patient's risk of developing a pressure ulcer .
A total Waterlow score ≥10 indicates risk for pressure ulcer. A high risk score is ≥15. A very high risk exists at scores ≥20. The reverse side of the Waterlow card lists examples of preventive aids and interventions. [2]
Pressure ulcer [22] – Also known as decubitus ulcers or bedsores, this type of wound is a result of chronic pressure to the skin over a prolonged period. While most individuals have intact sensation and motor function which allow for frequent positional change to prevent the formation of such ulcers, older individuals are particularly ...
Several theories have been put forth, however the pathophysiology of pressure urticaria is unknown. [3] Although there isn't an obvious early cutaneous reaction, the time of the reaction following the application of pressure to the skin, the shape of the lesions, and the infiltrating cells observed on histopathologic examination are indicative of a late-phase reaction. [5]
Ad
related to: jkr model of contact pressure ulcer symptoms checklist