Manual bone cement mixing method

Agitating – In vacuum chamber

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Details

366288, 366312, B01F 1306

Patent

active

053483910

ABSTRACT:
A method for mixing bone cement by mixing PMMA powder and MMA liquid in a vacuum chamber using a rotary mixer having a pair of spaced mixing arms. The rotary mixer is manually rotated by a gear drive. The arms of the rotary mixer follow continuous paths, each path having a plurality of loops at the wall of the chamber and curved portions extending across the chamber between loops. The arms move through the cement, break bubbles and thoroughly mix the PMMA and MMA. Gas from broken bubbles is vacuum drawn from the mixer by a vacuum source. The vacuum source is deactivated when a vacuum tube is detached from the mixer.

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