A stent delivery system including: a reconstrainable self expanding tubular stent comprising an elongated tubular body comprising a proximal portion, a distal portion, and a lumen extending between the proximal portion and the distal portion, wherein the elongated tubular body further comprises one or more wires; a suture comprising a grasping loop connected to the proximal portion of the stent; and wherein the grasping loop is configured to assume a first configuration when at a temperature below a first temperature and a second configuration when at a second temperature above the first temperature: an introducer onto which the stent is in use loaded: characterised in that the introducer comprises: an introducer elongated tubular body comprising a proximal portion, a distal portion, a shoulder portion disposed at the proximal portion, and a pusher portion disposed on the introducer elongated tubular body separate from and in a direction distal to the shoulder portion, wherein the grasping loop is in the first configuration wrapped around the introducer between the shoulder portion of the introducer and the pusher portion of the introducer;the grasping loop enabling the stent to be held in place and such that when moving in use to the second configuration the grasping loop unravels from the introducer and detaches therefrom permitting the introducer to be retracted from the stent and the grasping loop; an outer sheath configured to compress the tubular stent body such that the elongated tubular stent body has an outer diameter less than when the elongated tubular stent body is in an expanded state; the outer sheath configured for slideable disposition over at least portion of the introducer, the stent and the grasping loop in the first configuration and to expose at the second temperature the grasping loop in the second configuration. a reconstrainable self expanding tubular stent comprising an elongated tubular body comprising a proximal portion, a distal portion, and a lumen extending between the proximal portion and the distal portion, wherein the elongated tubular body further comprises one or more wires; a suture comprising a grasping loop connected to the proximal portion of the stent; and wherein the grasping loop is configured to assume a first configuration when at a temperature below a first temperature and a second configuration when at a second temperature above the first temperature: an introducer onto which the stent is in use loaded: characterised in that the introducer comprises: an introducer elongated tubular body comprising a proximal portion, a distal portion, a shoulder portion disposed at the proximal portion, and a pusher portion disposed on the introducer elongated tubular body separate from and in a direction distal to the shoulder portion, wherein the grasping loop is in the first configuration wrapped around the introducer between the shoulder portion of the introducer and the pusher portion of the introducer;the grasping loop enabling the stent to be held in place and such that when moving in use to the second configuration the grasping loop unravels from the introducer and detaches therefrom permitting the introducer to be retracted from the stent and the grasping loop; an outer sheath configured to compress the tubular stent body such that the elongated tubular stent body has an outer diameter less than when the elongated tubular stent body is in an expanded state; the outer sheath configured for slideable disposition over at least portion of the introducer, the stent and the grasping loop in the first configuration and to expose at the second temperature the grasping loop in the second configuration. an introducer elongated tubular body comprising a proximal portion, a distal portion, a shoulder portion disposed at the proximal portion, and a pusher portion disposed on the introducer elongated tubular body separate from and in a direction distal to the shoulder portion, wherein the grasping loop is in the first configuration wrapped around the introducer between the shoulder portion of the introducer and the pusher portion of the introducer;the grasping loop enabling the stent to be held in place and such that when moving in use to the second configuration the grasping loop unravels from the introducer and detaches therefrom permitting the introducer to be retracted from the stent and the grasping loop; an outer sheath configured to compress the tubular stent body such that the elongated tubular stent body has an outer diameter less than when the elongated tubular stent body is in an expanded state; the outer sheath configured for slideable disposition over at least portion of the introducer, the stent and the grasping loop in the first configuration and to expose at the second temperature the grasping loop in the second configuration.