impregnated foot
Introduction
Introduction to impregnated foot The immerisionfoot, also known as the trenchfoot, is a non-frozen tissue injury caused by localized blood circulation disorders caused by long-term static exposure of both lower limbs to cold and humid environments. basic knowledge The proportion of illness: 0.001% Susceptible people: no special people Mode of infection: non-infectious Complications: exfoliation syndrome
Cause
Impregnated foot cause
(1) Causes of the disease
A non-frozen tissue injury caused by local blood circulation disorders due to long-term static exposure of both lower extremities to cold, humid environments.
(two) pathogenesis
Over-tight shoes, gloves, stiff standing state, leading to vasoconstriction and diastolic dysfunction of blood vessels, loss of heat, tissue damage caused by ischemia, increased vascular permeability, edema formation, extravascular fluid extravasation, blood vessels The internal cell pressure increases, the blood flow stagnates, and the ischemia is intensified.
Prevention
Dipping foot prevention
In cold and humid environment, you should pay attention to heat preservation and cold, wear loose shoes and socks, once the disease should be quickly separated from the wet and cold environment, the patient rests in bed, restore local blood circulation, the affected limb should be gently flexed or raised, moderately warm, gently massage the affected limb Proximal non-numb area.
Complication
Impregnated foot complications Complications
In severe cases, blisters, blood blisters, intradermal or subcutaneous hemorrhage, epidermal exfoliation or superficial gangrene, hair and deck detachment, often accompanied by bacterial infections may occur.
Symptom
Impregnated foot symptoms Common symptoms Sensory allergy refers to (toe) numbness tachycardia blister joint stiffness
Pre-congestion: It can be produced shortly after exposure to wet and cold environment. It can last for several hours to several days. It only starts to feel local cold and discomfort. As the exposure time prolongs, it gradually appears to be dull, limbs become cold, pale, numb, light. The swelling is swollen and the surrounding pulse is weakened or disappears.
The period of congestion: starting from a few hours after the patient leaves the wet and cold environment, it can last for 6 to 10 weeks. The affected limbs turn red, hot, no sweat and obvious swelling. The surrounding pulse beats obviously, and there is diffuse burning pain, which is intensified in ten days. Left and right offspring with paroxysmal tingling, increased heat, relieved by cold, and can be induced by a variety of stimuli, may have mild tachycardia, hypothermia, temporary proteinuria and other systemic symptoms, severe cases may appear blisters, blood blister, Intradermal or subcutaneous hemorrhage, epidermal exfoliation or superficial gangrene, hair and deck shedding, often accompanied by bacterial infections.
Late stage of congestion: Sustained for several months or years, the local temperature of the affected limb is reduced, there is a cold feeling, common Raynaud's phenomenon, hypersensitivity, sweating, joint stiffness, recurrent edema, bullae, skin and attachment atrophy.
Examine
Immersion foot inspection
Histopathology: no obvious histopathological changes in early stage. When dysfunction and nutritional damage occur, histopathological changes manifest as vascular injury, fibrosis around small arteries, intimal thickening, thrombosis, luminal occlusion, dermis, subcutaneous Fat and muscle fibrosis can involve nerves and infiltrate inflammatory cells.
Diagnosis
Immersion foot diagnosis
There is a local cold and discomfort soon after exposure to a wet and cold environment. As the exposure time prolongs, the sensation is slow, the limbs become cold, pale, numb, mildly swollen, the surrounding pulse is weakened or disappeared, and the patient is separated from the wet and cold environment for several hours. At the beginning, it lasts for 6 to 10 weeks. The affected limbs turn red, hot, no sweat and obvious swelling. The surrounding pulse beats obviously, and there is diffuse burning pain, which is intensified. After about 10 days, the offspring have a paroxysmal tingling and the heat is intensified. Relieved by cold, and can be induced by a variety of stimuli, lasting for months or years, the local temperature of the affected limb is reduced, there is a cold feeling, common Raynaud's phenomenon, hypersensitivity, sweating, joint stiffness, recurrent edema, bullae, skin And the attachment shrinkage and other phenomena can be diagnosed.
