Surgical stapling device
View Patent ↗A surgical stapling device is provided having a shaft, a surgical staple slidable longitudinally within the shaft, and a staple-firing mechanism for driving the staple towards the forward end of the housing, bending the staple to bring the free ends of the legs towards one another to close the staple, and releasing the closed staple. The device also includes a blood locator tube slidable longitudinally within the shaft between an initial extended position wherein a forward end of the tube projects beyond the forward end of the shaft to enter a puncture site in a liquid-carrying vessel in a human or animal, thereby to locate the forward end of the shaft at the puncture site, and a retracted position wherein the tube is retracted into the housing in coordination with the closure of the staple. The tube has a longitudinal slot extending rearwardly from its forward end and the back of the staple is accommodated transversely in the slot.
1. A surgical stapling device, comprising:
an elongate housing having a free forward end;
a surgical staple slidable longitudinally within the housing towards the forward end thereof, the staple having a back and two forwardly pointing legs;
a staple-firing mechanism for driving the staple towards the forward end of the housing, bending the staple to bring the free ends of the legs towards one another to close the staple, and releasing the closed staple; and
an elongated locator member slidable longitudinally within the housing between an initial extended position wherein a forward end of the locator member projects beyond the forward end of the housing to enter a puncture site in a liquid-carrying vessel in a human or animal, thereby to locate the forward end of the housing at the puncture site, and a retracted position wherein the locator member is retracted into the housing in coordination with the closure of the staple, wherein the locator member has a longitudinal slot extending rearwardly from its forward end partially along the length of the locator member, and wherein the back of the staple is accommodated transversely in the slot with its forwardly pointing legs disposed externally of and respectively on opposite sides of the locator member.
2. A device as claimed in claim 1 , wherein the staple-firing mechanism comprises an actuator slidable longitudinally of the housing within the slot for driving the staple towards the forward end of the housing, and an anvil against which the staple is driven by the actuator to deform and close the staple.
3. A device as claimed in claim 2 , wherein the anvil comprises an element extending transversely through the slot in the locator member in front of the staple, the forward end of the locator member being positioned behind the said transverse member in the retracted position of the locator member to allow release of the closed staple.
4. A device as claimed in claim 3 , further including resilient biasing means for pushing the closed staple upwardly relative to the transverse element to release the closed staple.
5. A device as claimed in claim 1 , wherein the locator member comprises a hollow tube for accommodating a guidewire and for conducting blood back along the housing to a visualization port.