[Phlegmasia caerulea dolens . Acute venous stasis and ischemic phlebothrombosis].

On the basis of the data of the literature and of 25 personal cases, the problem of phlegmasia caerulea is contemplated in its whole. Grégoire made an outstanding description of the condition in 1938; it was related to an arterial spasm, but later works showed the importance of the venous block and the secondary character of the arterial involvement. A severe form of venous thrombosis, phlegmasia caerulea dolens often occurs in elderly patients (11/25 in our series) or in persons in a poor general condition. The primary phenomenon is the occurrence, in various etiological circumstances, of an acute venous stasis giving rise to a number of phenomena, including extensive thrombosis and arterial involvement, which lead to irreversible lesions and to gangrene. Thus there is a first reversible phase of acute venous stasis with a still moderate arterial involvement, and a second phase of evolution with marketed ischemia, in which the tissular lesions can become irreversible. The necrosis results from the massive obliteration of the cutaneous venulae, not from the arterial failure. The old term of venous gangrene (Cruveilhier) points out to the mechanism and makes the practicioner aware of the extreme severity of any ischemic phlebitis, which can reach an irreversible stage within a few hours. The condition is therefore an emergency, and venous drainage must be re-established as quickly as possible in the limb, thus breaking the pathological cycle leading to irreversible lesions. In the simple venous stasis phase, a medical treatment may be attempted, but it must not be continued if it is not effective. Venous thrombectomy, a quick and safe procedure, therefore is the solution to choose either at once or after a short trial of medical treatment. Phlegmasia caerula certainly is the best indication for this procedure. If operated on time, the results are excellents: however, in very advanced cases with massive and total thrombosis of the venous system, amputation remains the only solution.