Medical instrument set, delivery system, and embolic device delivery medical system

An embolic device delivery medical system comprising:

• a delivery catheter, the delivery catheter including a sheath that includes a sheath lumen and a distal end opening that communicates with the sheath lumen, and a sheath hub that includes a communication passage communicating with a proximal end of the sheath lumen and is provided on a proximal side of the sheath;
• an embolic device loading catheter that includes a catheter body including a loading lumen configured to be loaded with the embolic device and having an open distal end, and a proximal hub including an insertion passage communicating with a proximal end of the loading lumen;
• a delivery pusher that includes an elongated pusher body insertable into the loading lumen through the insertion passage of the proximal hub of the embolic device loading catheter;
• the embolic device loading catheter including a distal connection portion configured to be attachable to and detachable from a sheath hub of a delivery catheter at a distal portion of the catheter body;
• the pusher body having a body length longer than a distance from a proximal end of the insertion passage of the proximal hub to the distal end opening of the sheath of the delivery catheter in a connected state where the distal connection portion of the catheter body is connected to the sheath hub of the delivery catheter, and when the pusher body is inserted from the insertion passage of the proximal hub in the connected state, the embolic device is configured to pass through the sheath lumen of the delivery catheter and to be pushed out from the distal end opening of the delivery catheter into the aneurysm;
• and
• an elongated insertion assisting member configured to be assembled into the sheath lumen of the delivery catheter in order to assist delivery of the delivery catheter into the aneurysm, and wherein the insertion assisting member includes a guide wire lumen that penetrates from a distal end to a proximal end and has a diameter smaller than that of the sheath lumen of the delivery catheter.

A method comprising:

• introducing a distal portion of a delivery catheter into a living body and positioning the distal end of the delivery catheter in an aneurysm in the living body, the delivery catheter including a sheath that includes a sheath lumen and a distal end opening that communicates with the sheath lumen, and a sheath hub that includes a communication passage communicating with a proximal end of the sheath lumen and is provided on a proximal side of the sheath;
• connecting a distal portion of an embolic device loading catheter to the proximal end of the delivery catheter, the embolic device loading catheter including a catheter body including a loading lumen loaded with an embolic device and having an open distal end, and a proximal hub including an insertion passage communicating with a proximal end of the loading lumen;
• introducing a distal end of a delivery pusher into the embolic device loading catheter by way of the proximal end of the loading lumen, the delivery pusher including an elongated pusher body insertable into the loading lumen through the insertion passage of the proximal hub of the embolic device loading catheter, and wherein the pusher body has a body length longer than a distance from a proximal end of the insertion passage of the proximal hub of the embolic device loading catheter to the distal end opening of the sheath of the delivery catheter when the distal portion of the catheter body is connected to the proximal end of the delivery catheter;
• and
• moving the delivery pusher in a forward direction to push the embolic device out of the embolic loading catheter into the sheath lumen of the delivery catheter and out of the sheath lumen of the delivery catheter into the aneurysm.