1. With this method of investigation it appears that compression stockings have no value in preventing venous thrombosis after operation. 2. Clinical diagnosis is unreliable in detecting the presence of deep‐vein thrombosis. 3. We have confirmed that the incidence of deepvein thrombosis after operation is of the order of 30–35 per cent.

No abstract

No abstract

1965) to result in lower plasma lignocaine levels. If signs of cortical toxicity or myocardial or medullary depression appear, the release of further local anaesthetic should be prevented by reinflating the cuff. The importance of the injection-tourniquet release time is uncertain. While toxic reactions have been described with early release of the tourniquet (Cox, 1964; Dawkins and others, 1964) and several authors (e.g., Dunbar and Mazze, 1967) have, in consequence, recommended a minimum injectionrelease interval, Hargrove and others (1966) did not find any difference in the plasma lignocaine levels with intervals ranging from 5 to 30 minutes.