TELESCOPIC CANNULA WITH BLOCKING Russian patent published in 2015 - IPC A61B17/34 

FIELD: medicine.

SUBSTANCE: invention relates to medicine. Set of telescopic cannula with blocking contains multitude of telescopic tubes, made, all together, with such shape and dimensions as to reach specified place relative to anatomical area. Each tube has preliminarily installed blocking shape. Construction of internal tube, inserted into external tube, contains clearance between tubes, which are blocked with each other inside clearance to limit turn of tubes relative to clearance. Blocking shapes of tubes can be similar or different. Examples of blocking with each other shapes are as follows: polygonal blocking shape, blocking shape in form of non-circular closed curve, combined blocking shape in form of polygonal curve and blocking shape in form of spline.

EFFECT: orientation to tubes, set by planning device, is provided.

14 cl, 22 dwg