Nail pull device in a means of fixation of bone fragments at bone fractures.

摘要

Device for extracting nails in a fixing means for fixing bone fragments at bone fractures, wherein the fixing means (2) includes a bushing (6) and at least one pin (7) provided in said ferrule (6 ), wherein the bushing (6) in a part forward end (9) has at least one opening (10) in a longitudinal side thereof, wherein a front portion (11) of the pin (7) extends, when said pin (7) it is located in an operating position outside the cap (6) through the opening (10) and engages the bone material of one of the bone fragments (3, 4) and wherein the device extraction (1) it is adapted to pull the pin in a rearward direction relative to the sleeve (6) for removing the front (11) of the pin (7) from bone material of one of the bone fragments (3, 4) and to the bushing (6), characterized in that the extraction device (1) comprises an inner extraction member (12) connectable to the pin (7), an outer extraction member (13) connectable to the sleeve (6) and wherein the inner extraction member (12) insertable through a hole (33) in said removal member (13) and an extraction handle (14) can also be inserted into the outer extraction member (13) through said hole (33) therein for cooperation with the inner extraction member ( 12) and rotatable with respect to members of outer and inner extraction (13, 12) to extract, through the inner extraction member (12), the pin (7) in a direction (R) of extraction or withdrawal relative to outer extraction member (13) and the bushing (6) without subjecting this way the pin (7) to torsional forces, that the outer extraction member (13) can be attached manually to prevent said outer extraction member (13 ) can rotate when the extraction handle (14) rotates and members of external and internal extraction (13, 12) are provided with members preventing the rotation (32, 29) which would cooperate to prevent the inner extraction member (12) rotatable relative to member external extraction (13) when rotating the extraction handle (14).