FIELD: medicine. SUBSTANCE: restrictor is made in form of closed zigzag-shaped wire spring rolled up into a cylinder. Spring has pitch with curves made in form of circles with radius being equal to quarter pitch of the zigzag. The spring is made of material with shape memorizing. Device may have additional curves which are bent outside conically for preserving migration of the device. EFFECT: reduced traumatism; reduced migration and shifts. 2 cl, 3 dwg
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Authors
Dates
1995-04-30—Published
1986-07-17—Filed