PREVENTION OF EXPERIMENTAL SHOCK FOLLOWING VENOUS OCCLUSION IN THE DOG BY THE APPLICATION OF A RIGID CAST

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Abstract
In a series of 13 dogs the application of a plaster cast for 36 hrs. to the lower extremities led to the survival of 11 animals following venous occlusion of the limb. Only one dog died in shock. This contrasts with the development of shock in 13 of 15 dogs when no cast is applied; death occurring in 3 1/2-21 hrs. These results indicate that the cast by preventing the local accumulation of plasma fluid avoided the shock syndrome. The local fluid accumulation which occurred following the removal of the cast developed at a slower rate than in the control series. The absence of untoward results in the period following removal of the cast suggests that for the shock syndrome to become established the loss of plasma fluids must occur at a rapid rate, a rate faster than compensating mechanisms can cope with. This casting procedure appears to be applicable clinically for use in both civilian and military crush injuries.

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