A catheter system , comprising: a catheter shaft including a distal catheter tip portion ; a hydraulic chamber capable of transitional displacement along a longitudinal axis of the catheter shaft ; and a braided member located between the catheter tip portion and the hydraulic chamber and being extensible along the longitudinal axis of the catheter shaft ; wherein the transitional displacement of the hydraulic chamber exerts force on the braided member such that it controllably facilitates the axial actuation of the braided member effecting a variable adjustable radial force; characterized in that the hydraulic chamber comprises: an outer tubular member having a distal end plug and a proximal end plug ; an elongate inner tubular member forming a catheter shaft ; the hydraulic chamber being formed by a proximal lateral surface of an annular distal seal , a distal lateral surface of an annular proximal seal , the internal surface of the outer tubular member and the external surface of the inner tubular member, wherein the annular distal seal is formed from the internal surface of the outer tubular member, the annular proximal seal is formed from the external surface of the inner tubular member; and a hydraulic fluid port formed as lateral opening in the catheter shaft surface, positioned between the proximal and distal seal and maintaining the hydraulic chamber in fluid-tight communication with a hydraulic lumen in the catheter shaft. a catheter shaft including a distal catheter tip portion ; a hydraulic chamber capable of transitional displacement along a longitudinal axis of the catheter shaft ; and a braided member located between the catheter tip portion and the hydraulic chamber and being extensible along the longitudinal axis of the catheter shaft ; wherein the transitional displacement of the hydraulic chamber exerts force on the braided member such that it controllably facilitates the axial actuation of the braided member effecting a variable adjustable radial force; characterized in that the hydraulic chamber comprises: an outer tubular member having a distal end plug and a proximal end plug ; an elongate inner tubular member forming a catheter shaft ; the hydraulic chamber being formed by a proximal lateral surface of an annular distal seal , a distal lateral surface of an annular proximal seal , the internal surface of the outer tubular member and the external surface of the inner tubular member, wherein the annular distal seal is formed from the internal surface of the outer tubular member, the annular proximal seal is formed from the external surface of the inner tubular member; and a hydraulic fluid port formed as lateral opening in the catheter shaft surface, positioned between the proximal and distal seal and maintaining the hydraulic chamber in fluid-tight communication with a hydraulic lumen in the catheter shaft. an outer tubular member having a distal end plug and a proximal end plug ; an elongate inner tubular member forming a catheter shaft ; the hydraulic chamber being formed by a proximal lateral surface of an annular distal seal , a distal lateral surface of an annular proximal seal , the internal surface of the outer tubular member and the external surface of the inner tubular member, wherein the annular distal seal is formed from the internal surface of the outer tubular member, the annular proximal seal is formed from the external surface of the inner tubular member; and a hydraulic fluid port formed as lateral opening in the catheter shaft surface, positioned between the proximal and distal seal and maintaining the hydraulic chamber in fluid-tight communication with a hydraulic lumen in the catheter shaft. <EOS>