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The French scale measures the outer diameter of the catheter, not the size of the internal drainage channel (inner diameter). For instance, a two-way catheter of 20 Fr and a three-way catheter of 20 Fr have the same outer diameter, but the three-way catheter has an additional channel for irrigation, reducing the size of its drainage channel.
Wound bed, wound edge and periwound skin should be examined before the initial treatment plan is devised. It should also be re-assessed at each visit or each dressing change. For wound bed, the following parameters are assessed: Tissue type; presence and percentage of non-viable tissue covering the wound bed; Level of exudate; Presence of infection
The International Red Cross wound classification system is a system whereby certain features of a wound are scored: the size of the skin wound(s); whether there is a cavity, fracture or vital structure injured; the presence or absence of metallic foreign bodies. A numerical value is given to each feature (E, X, C, F, V, and M).
Without comorbidities, wounds are thought to be able to heal if the oxygen tension is >40 mmHg. [1] In the presence of comorbities, such as diabetes or edema, a higher value is likely needed. Patients with oxygen tensions <20 mmHg are likely to need revascularization to promote adequate wound healing. [3]
According to FMI, the coronavirus pandemic will increase demand for digital wound measurement devices, as diabetic patients are more vulnerable to coronavirus.
The Wallace rule of nines is a tool used in pre-hospital and emergency medicine to estimate the total body surface area (BSA) affected by a burn.In addition to determining burn severity, the measurement of burn surface area is important for estimating patients' fluid requirements and determining hospital admission criteria.
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Proper evaluation of wound depth includes use of a probe to measure wound depth and evaluate for undermining of wound edges or sinus/fistula formation. Necrotic tissue, slough, eschar : Wounds may be covered with a layer of dead tissue which may appear cream/yellow in color (slough) or as a black, hardened tissue ( eschar ).