Dissolvable anastomosis stent and method for using the same

Claim 1

A dissolvable stent for mammalian anastomoses comprising a first member for receiving a first vessel stump, a second member for receiving a second vessel stump, and engaging means for engaging the first and second members, the first and second members and the engaging means being constructed of a biocompatible, non-toxic material which substantially completely dissolves in mammalian bodily fluids, wherein the first and second members each has a cavity extending at least partially therethrough along a longitudinal axis thereof and the engaging means is longitudinally insertable at least partially in the cavities.

Claim 7

A method of surgical mammalian vessel anastomosis connecting a first vessel stump having an external surface and a generally annular opening to a second vessel stump having an external surface and a generally annular opening using a dissolvable stent, the stent comprising a male member for receiving a first vessel stump, the male member having a first end with a first circumference and a second end with a second circumference smaller than the first circumference, and a female member for receiving a second vessel stump, the female member having first and second ends, an outer circumference at least partially substantially the same as the first circumference of the male member and an inner circumference for at least partially receiving the second end of the male member, the male and female members of the stent being axially aligned when the second end of the male member is received by the female member, the method comprising the steps of: (a) circumferentially inserting a first purse-string suture into the first vessel stump and circumferentially inserting a second purse-string suture into the second vessel stump, the first and second purse-string sutures being positioned proximate edges of the first and second vessel stumps; (b) inserting the first end of the male member of the stent into the opening of the first vessel stump and inserting the second end of the female member of the stent into the opening of the second vessel stump; (c) inserting the second end of the male member of the stent partially into the first end of the female member of the stent; (d) tightening the purse-string sutures to annularly introflect the edges of the first and second vessel stumps onto the second end of the male member of the stent; (e) inserting the second end of the male member of the stent farther into the female member of the stent to cause the annularly introflected edge of the first vessel stump to engage the annularly introflected edge of the second vessel stump to form a substantially annular engagement region between the male and female members with a clamping force sufficient to maintain the edges of the stumps in the annular engagement region; (f) applying a biocompatible sealant to the external surfaces of the first and second vessel stumps to substantially entirely cover the substantially annular engagement region; and (g) removing the purse-string sutures from the first and second vessel stumps.

Claim 8

A method of surgical mammalian vessel anastomosis connecting a first vessel stump having an external surface and a generally annular opening to a second vessel stump having an external surface and a generally annular opening using a dissolvable stent, the stent comprising a male member for receiving a first vessel stump, the male member having a first end with a first circumference and a second end with a second circumference smaller than the first circumference, and a female member for receiving a second vessel stump, the female member having first and second ends, an outer circumference at least partially substantially the same as the first circumference of the male member and an inner circumference for at least partially receiving the second end of the male member, the male and female members of the stent being axially aligned when the second end of the male member is received by the female member, the method comprising the steps of: (a) circumferentially inserting a first purse-string suture into the first vessel stump and circumferentially inserting a second purse-string suture into the second vessel stump, the first and second purse-string sutures being positioned proximate edges of the first and second vessel stumps; (b) inserting the first end of the male member of the stent into the opening of the first vessel stump and inserting the second end of the female member of the stent into the opening of the second vessel stump; (c) inserting the second end of the male member of the stent partially into the first end of the female member of the stent; (d) tightening the purse-string sutures to annularly introflect the edges of the first and second vessel stumps onto the second end of the male member of the stent; (e) inserting the second end of the male member of the stent farther into the female member of the stent to cause the annularly introflected edge of the first vessel stump to engage the annularly introflected edge of the second vessel stump to form a substantially annular engagement region between the male and female members with a clamping force sufficient to maintain the edges of the stumps in the annular engagement region; (f) applying a biocompatible sealant to the external surfaces of the first and second vessel stumps to substantially entirely cover the substantially annular engagement region; and (g) removing the purse-string sutures from the first and second vessel stumps.