a catheter comprising a proximal portion, a distal portion and a hollow cavity extending there between, the distal portion of the catheter configured to be deployed into a lumen of a blood vessel by advancing the catheter through a first vascular access point of a subject; and

an elongate member comprising a distal tip portion mounted with a first magnetic element and configured to be insertable within the catheter, a region proximate to the distal tip portion mounted with the first magnetic element, formed of a softer material than the rest of the elongate member, the distal tip portion of the elongate member configured to be deployed in the lumen of the blood vessel by advancing the elongate member through the catheter deployed in the lumen of the blood vessel through the first vascular access point,

wherein the catheter comprises an inflatable balloon located proximate to the distal portion and an expandable occlusive mesh mounted to the inflatable balloon, wherein the elongate member is configured to inflate the balloon, wherein the inflating the balloon facilitates expansion of the expandable occlusive mesh radially, thereby providing a passageway for the elongate member and a guidewire for magnetic coupling,

wherein the first magnetic element of the elongate member is configured to exert a first magnetic force to magnetically couple with the guidewire advancing within the lumen of the blood vessel through a second vascular access point of the subject, and

wherein a magnetic coupling of the elongate member and the guidewire facilitates attracting the guidewire into the catheter and drawing out from the first vascular access point by simultaneously withdrawing the elongate member from the first vascular access point and advancing the guidewire through the second vascular access point.