Medical devices

A method of using a medical device, comprising:

• deploying a first guidewire distal looped portion and a second guidewire distal looped portion of the medical device from a distal end of an elongate outer sheath that extends along a sheath longitudinal axis and defines a central lumen extending therethrough;
• guiding an occlusion device disposed at a distal end of an elongate flexible shaft along the first guidewire distal looped portion and the second guidewire distal looped portion, wherein the occlusion device is guided from an orientation that is aligned with the sheath longitudinal axis towards an orientation that is perpendicular with the sheath longitudinal axis;
• and activating the occlusion device via a control disposed proximally of the distal end of the elongate outer sheath, wherein activating the occlusion device includes activating the occlusion device via a control disposed at a proximal end of the elongate outer sheath, wherein activating the occlusion device includes causing a first jaw and a second jaw to move with respect to one another, upon actuation of the control disposed at the proximal end of the elongate outer sheath.