A stent delivery system comprising: an elongate shaft including a proximal portion, a distal portion, a lumen extending at least partially therethrough, and a stent receiving portion on the distal portion of the shaft; a stent positioned at the stent receiving portion of the elongate shaft, the stent having a constrained configuration and an expanded configuration; a proximal constraining member releasably connected to a proximal portion of the stent and having a first position and a second position; a distal constraining member releasably connected to a distal portion of the stent and having a first position and a second position; wherein the stent is in the constrained configuration with the proximal and distal constraining members in the first position and the stent is in the expanded configuration with the proximal and distal constraining members in the second position; a first biasing member operably connected to the shaft; and a second biasing member operably connected to the shaft, the first and second biasing members operably connected respectively to the proximal and distal constraining members; a first pull wire operably connected to the first biasing member and configured to move the stent between the constrained and expanded configurations; and a second pull wire operably connected to the second biasing member; characterized in that: the first biasing member comprises a fixed end portion connected to the elongate shaft and a free end portion, the free end portion positioned proximal to the fixed end portion; the second biasing member comprises a fixed end portion connected to the elongate shaft and a free end portion, the free end portion positioned distal to the fixed end portion; and the first and second biasing members have a first configuration cooperatively applying a longitudinal tensioning force to the stent and a second configuration cooperatively releasing the longitudinal tensioning force on the stent and wherein second pull wire is configured to cooperate with the first pull wire to move the stent between the constrained and expanded configurations. an elongate shaft including a proximal portion, a distal portion, a lumen extending at least partially therethrough, and a stent receiving portion on the distal portion of the shaft; a stent positioned at the stent receiving portion of the elongate shaft, the stent having a constrained configuration and an expanded configuration; a proximal constraining member releasably connected to a proximal portion of the stent and having a first position and a second position; a distal constraining member releasably connected to a distal portion of the stent and having a first position and a second position; wherein the stent is in the constrained configuration with the proximal and distal constraining members in the first position and the stent is in the expanded configuration with the proximal and distal constraining members in the second position; a first biasing member operably connected to the shaft; and a second biasing member operably connected to the shaft, the first and second biasing members operably connected respectively to the proximal and distal constraining members; a first pull wire operably connected to the first biasing member and configured to move the stent between the constrained and expanded configurations; and a second pull wire operably connected to the second biasing member; characterized in that: the first biasing member comprises a fixed end portion connected to the elongate shaft and a free end portion, the free end portion positioned proximal to the fixed end portion; the second biasing member comprises a fixed end portion connected to the elongate shaft and a free end portion, the free end portion positioned distal to the fixed end portion; and the first and second biasing members have a first configuration cooperatively applying a longitudinal tensioning force to the stent and a second configuration cooperatively releasing the longitudinal tensioning force on the stent and wherein second pull wire is configured to cooperate with the first pull wire to move the stent between the constrained and expanded configurations. the first biasing member comprises a fixed end portion connected to the elongate shaft and a free end portion, the free end portion positioned proximal to the fixed end portion; the second biasing member comprises a fixed end portion connected to the elongate shaft and a free end portion, the free end portion positioned distal to the fixed end portion; and the first and second biasing members have a first configuration cooperatively applying a longitudinal tensioning force to the stent and a second configuration cooperatively releasing the longitudinal tensioning force on the stent and wherein second pull wire is configured to cooperate with the first pull wire to move the stent between the constrained and expanded configurations.