Marc de L’lesere Colombat devised his hysterotome so that trachelectomy could be precisely and quickly performed by anyone possessing modest skills.  Hence, the tenaculum is applied to the cervix by means of the plunger passing through the central shaft.  Next the sickle-shaper blade at the distal most extent of the spring loaded arm, is brought t bear upon the cervix and while traction is applied the blade rotates about the circumference of the cervix while cutting more deeply with each rotation until a flawless conization is completed.