REPLACEABLE HEAD PIECE TO ELECTRODE-KNIFE OF PLACEMAKER FOR DISSECTION OF CICATRICIAL TISSUES SURROUNDING THE EXTRAVASCULAR FRAGMENT OF PLACEMAKER ELECTRODE (VERSIONS) Russian patent published in 2017 - IPC A61B17/32 

FIELD: medical equipment.

SUBSTANCE: group of inventions relates to medical equipment, namely to electrosurgical tools for electric coagulation and dissection of tissue, in particular, to devices for dissection of cicatricial tissues surrounding the extravascular fragments of endocardial electrodes of implanted pacemaker, and can be used for safe separation of electrodes of pacemaker during replacement or upgrade pacemaker. Device includes a housing, having lower and upper parts, working part with sharpened edge, fixed on the lower part of the housing. Working part with sharpened edge is made in the form of a chute with arc-like cross section with skewed downward chamfer on the front part of the chute or smooth pointing on the front part of chute. In the lower part of the housing is a slot with possibility of contact of the working part of inserted electrode-knife with its tissue. In the first version of the housing it is made in the form of elongated element with lengthwise inner channel for introduction of electrode-knife, note that longitudinal inner channel is made with fixation element. In the second version of the housing it includes outer tubular body and spring-loaded internal tubular body, made with possibility of introduction of electrode-knife and displacement relative to the outer tubular body. At that, between outer and inner tubular bodies are installed limiters, determining internal stroke length of the tubular body.

EFFECT: use of a group of inventions will allow to cut scar tissues around extravascular fragment of the pacemaker electrode without breaking the electrode, which reduces injuries and duration of operative interventions compared to existing techniques.

22 cl, 11 dwg