1. The guidewire for use in a medical procedure, comprising: an elongated guide member having dimensions which ensure its insertion into the patients body vessel, defining a longitudinal axis and having a front and rear end portions, wherein the transverse dimension of the proximal end portion is smaller than the transverse dimension of the adjustable the end portion, the front end portion comprises a first core element comprising a first material and a second base member comprising a second material different from the first material and races Assumption before the first main element, wherein the first material of the first base member has a greater rigidity than the rigidity of the second material of the second core element to facilitate advancement of the front end portion and the application thereto of torque while minimizing deformatsii.2. Guide according to claim 1, wherein the first material of the first base member comprises an alloy of nickel, cobalt and hroma.3. Guide according to claim 2, wherein the first material of the first base member comprises stainless stal.4. Guide according to claim 2, wherein the second material of the second base member comprises nickel and titanium or their splav.5. The guide according to claim 4, wherein the first basic element is connected directly to the second main elementom.6. The guide according to claim 5, wherein the first basic element is connected to a second main element by welding without use of any filler materiala.7. The guide of claim 1 comprising a spring coaxially disposed around the guide member and having a size to pass longitudinally secured on the changed1. Проволочный направитель для использования в медицинской процедуре, содержащий:удлиненный направляющий элемент, имеющий размеры, обеспечивающие его вставку в сосуд тела пациента, задающий продольную ось и имеющий задний и передний концевые участки, причем поперечный размер переднего концевого участка меньше, чем поперечный размер заднего концевого участка
