[Experimental tendon sheath formation by free transplantation of a long vein segment (comparative study of adhesions formed around free grafts and pedicled grafts)].

In dog experiments, in order to improve the functions after tendinous injuries diphasic operations have been performed by the authors. In the first phase, after the extirpation of the tendon of the 2nd finger its area has been bridged over by a 5-6 cm long autologous vein transplant, cannulated with a silicone rubber bar. After 4 weeks, after the vascularization of the vein transplant the silicone bar has been removed from a new approach, and through the "tunnel" formed in this way and padded with silicone a tendon has been pulled through with two different methods: 1. according to the method of Paneva-Holevitch a diphasic pedicled tendon transplant and 2. a free tendon transplant. No differences were found as regards the adhesions, the vascularization and the tissular structure of the tendon. It may be presumed that also the distal portion of the pedicled tendon transplant is really a free tendon transplant.