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  • Title: [Neurologic principles of edema in inactivity].
    Author: Trettin H.
    Journal: Z Lymphol; 1992 Dec; 16(1):14-6. PubMed ID: 1288027.
    Abstract:
    The complete immobilisation of a limb alone can lead to the formation of oedema. Whereas the oedema secondary to inactivity induced by immobilisation is completely reversible, and will only lead to tissue damage in the longterm, neglect of oedema secondary to inactivity in the presence of central and peripheral paresis (apoplectic insult, paraplegia, damage to the plexus brachialis) may entail serious consequences due to the danger of tissue fibrosis. With paresis of an extremity, the lymphovenous return is impaired by two decisive factors: increased hydrostatic pressure in the distal limb segment, and absence of the muscle pump. In flaccid paresis, where there is low muscle tone and no muscle pump action, there is also a low venous tone and the resultant hydrostatic pressure is especially high. Venous stasis in the sub- and prefascial veins leads to increased protein loss from the venous limb of the capillaries and the venules. Compensation initially occurs in the prefascial lymph outflow region (latent oedema) which becomes decompensated if overloaded (visible oedema). Fibrosis of the subcutis and trophic skin changes are the result. In spastic paresis the regional subfascial lymphatic system responds with lymphangiospasm. Where the sympathetic innervation is interrupted (e.g. brachial plexus paralysis) there is passive hyperaemia of the terminal vessels with vascular dilatation and lymphangioparalysis. Insufficiency of the vascular walls results in an accumulation of protein in the tissues, which ultimately ends in fibrosis with ankylosis and shortening of the tendons and muscles. The early administration of complex physical decongestion therapy with manual lymphatic drainage can prevent this state.
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