Embolic device delivery system

1 . A system comprising:

an elongated body comprising an elongated body proximal portion and an elongated body distal portion, the elongated body proximal portion having a first maximum cross-sectional dimension, wherein the elongated body distal portion comprises an inner surface defining a first inner lumen, and an outer surface extending more distally than the inner surface;

an interface member comprising an interface member proximal portion and an interface member distal portion;

an embolization device configured to expand from a delivery configuration to a deployed configuration, wherein the interface member distal portion is attached to the embolization device; and

a connecting member configured to contact the embolization device to mechanically connect the embolization device and the elongated body, wherein the connecting member is configured to extend into and out of the first inner lumen to mechanically connect the embolization device and the elongated body,

wherein in the delivery configuration, the embolization device comprises a device proximal portion having a second maximum cross-sectional dimension greater than the first maximum cross-sectional dimension, and

wherein the interface member proximal portion is configured to mate with the elongated body distal portion when the connecting member contacts and mechanically connects the embolization device and the elongated body, the interface member having a third maximum cross-sectional dimension greater than the first maximum cross-sectional dimension wherein the elongated body distal portion comprises a distal-most end, wherein the interface member proximal portion is configured to mate with the distal-most end of the elongated body distal portion, and wherein the distal-most end of the elongated body comprises a minimum cross-sectional dimension greater than the first maximum cross-sectional dimension.

2 . The system of claim 1 , wherein the interface member has a minimum cross-sectional dimension less than the second maximum cross-sectional dimension of the device proximal portion of the embolization device.

3 . The system of claim 1 , wherein the interface member tapers from the interface member distal portion having a maximum cross-sectional dimension that is substantially equal to the second maximum cross-sectional dimension of the embolization device to the interface member proximal portion having a cross-sectional dimension less than the second maximum cross-sectional dimension of the embolization device.

4 . The system of claim 1 , wherein either the interface member proximal portion or the elongated body distal portion defines a protrusion, and the other of the interface member proximal portion or the elongated body distal portion defines a recess configured to receive the protrusion.

5 . The system of claim 4 , wherein when the interface member proximal portion is mated with the elongated body distal portion, the protrusion and the recess are frictionally engaged and the recess is translatable over three dimensions on the protrusion.

6 . The system of claim 4 , wherein the protrusion has at least one shape selected from the group of a frustrum shape, a semi-hemispherical shape, and a pyramidal shape.

7 . The system of claim 1 ,

wherein the interface member defines a second inner lumen configured to align with the first inner lumen when the interface member proximal portion is mated with the elongated body distal portion, and

wherein the connecting member is configured to extend through the first inner lumen and the second inner lumen when the connecting member mechanically connects the embolization device and the elongated body.

8 . The system of claim 7 , further comprising a cord configured to partially occlude the first inner lumen,

wherein the cord is configured to prevent a passage of a ball portion of the connecting member through the first inner lumen when the cord partially occludes the first inner lumen, and

wherein the ball portion is configured to pass through the first inner lumen when the cord is retracted from the first inner lumen.

9 . The system of claim 1 , wherein the embolization device defines a proximal opening and the interface member distal portion is configured to be received in the proximal opening to mechanically connect the device proximal portion and the interface member distal portion.

10 . The system of claim 1 , further comprising a delivery catheter defining a lumen, wherein the elongated body, the interface member, and the embolization device are configured to be received within the lumen.

11 . The system of claim 10 , wherein the elongated body is configured to transfer a pushing force to the embolization device to deploy the embolization device from the lumen.

12 . The system of claim 1 , wherein the connecting member is configured to extend into the embolization device to mechanically connect the embolization device and the elongated body.

13 . The system of claim 1 ,

wherein the elongated body distal portion comprises a second inner surface defining a tapered inner lumen, the tapered inner lumen fluidly connected to the first inner lumen and tapering from the distal-most end to the first inner lumen.

14 . A system comprising:

an elongated body comprising an elongated body proximal portion and an elongated body distal portion, the elongated body proximal portion having a first maximum cross-sectional dimension, wherein the elongated body distal portion comprises an inner surface defining a first inner lumen, and an outer surface extending more distally than the inner surface;

an interface member comprising an interface member proximal portion and an interface member distal portion;

an embolization device configured to expand from a delivery configuration to a deployed configuration, the embolization device comprising a device proximal portion and the device proximal portion, and the device proximal portion attached to the interface member distal portion; and

a connecting member configured to contact the embolization device to mechanically connect the embolization device and the elongated body, wherein the connecting member is configured to extend into and out of the first inner lumen to mechanically connect the embolization device and the elongated body,

wherein the interface member distal portion is attached to the embolization device,

wherein either the interface member proximal portion or the elongated body distal portion defines a protrusion, and the other of the interface member proximal portion or the elongated body distal portion defines a recess configured to receive the protrusion,

wherein the interface member proximal portion is configured to mate with the elongated body distal portion when the recess receives the protrusion and the connecting member contacts and mechanically connects the embolization device and the elongated body,

wherein when the recess receives the protrusion, a nominal contact area is defined between the protrusion and the recess and the recess is translatable over three dimensions on the protrusion,

wherein the elongated body is configured to transfer a force through some portion of the nominal contact area and through the interface member and to the embolization device,

wherein in the delivery configuration, the device proximal portion has a second maximum cross-sectional dimension greater than the first maximum cross-sectional dimension, and

wherein the interface member having a third maximum cross-sectional dimension greater than the first maximum cross-sectional dimension wherein the elongated body distal portion comprises a distal-most end, wherein the interface member proximal portion is configured to mate with the distal-most end of the elongated body distal portion, and wherein the distal-most end of the elongated body comprises a minimum cross-sectional dimension greater than the first maximum cross-sectional dimension.

15 . The system of claim 14 , wherein the interface member defines a second inner lumen configured to be aligned with the first inner lumen when the interface member proximal portion is mated with the elongated body distal portion, and wherein the connecting member extends through the first inner lumen and the second inner lumen.

16 . The system of claim 14 , wherein the interface member proximal portion defines the protrusion and the elongated body distal portion defines the recess.

17 . The system of claim 14 , wherein the protrusion has at least one shape selected from the group of a frustrum shape, a semi-hemispherical shape, and a pyramidal shape.

18 . A method comprising:

introducing an embolization device system into vasculature of a patient, the embolization device system comprising:

an elongated body comprising an elongated body proximal portion and an elongated body distal portion, the elongated body proximal portion having a first maximum cross-sectional dimension, wherein the elongated body distal portion comprises an inner surface defining a first inner lumen, and an outer surface extending more distally than the inner surface,

an interface member comprising an interface member proximal portion and an interface member distal portion, wherein the interface member distal portion is attached to the embolization device,

a connecting member configured to contact the embolization device to mechanically connect the embolization device and the elongated body, wherein the connecting member is configured to extend into and out of the first inner lumen to mechanically connect the embolization device and the elongated body, and

an embolization device configured to expand from a delivery configuration to a deployed configuration, wherein the interface member distal portion is attached to the embolization device,

wherein in the delivery configuration, the embolization device comprises a device proximal portion having a second maximum cross-sectional dimension greater than the first maximum cross-sectional dimension, and

wherein the interface member proximal portion is configured to mate with the elongated body distal portion when the connecting member contacts and mechanically connects the embolization device and the elongated body, the interface member having a third maximum cross-sectional dimension greater than the first maximum cross-sectional dimension; and

deploying the embolization device at a target site within the vasculature wherein the elongated body distal portion comprises a distal-most end, wherein the interface member proximal portion is configured to mate with the distal-most end of the elongated body distal portion, and wherein the distal-most end of the elongated body comprises a minimum cross-sectional dimension greater than the first maximum cross-sectional dimension.

19 . The method of claim 18 , wherein deploying the embolization device at the target site within the vasculature comprises deploying the embolization device from a delivery catheter by at least applying a pushing force to the elongated body proximal portion, the method further comprising:

separating the elongated body and the embolization device; and

withdrawing the elongated body from the vasculature.