FIELD: medicine. SUBSTANCE: spine retractor has support members 2, 3 in form of two arms, provided with cuts 7. One support member has screw rest 4 and may move laterally along the mark. The other member has connecting cylinder 5, which moves for rotation relatively the clutch. Sleeve coupling 1 has internal single-start thread for rest screw. From outside it has mark 8 and cut 6 for key. EFFECT: retraction of spine at initial stage of operation; reduced traumatism. 1 dwg
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