Interventional system having cooperative balloon catheter and guidewire
An interventional system is used to treat a lesion in a target anatomy. The interventional system includes a balloon catheter and a guidewire. The balloon catheter includes a balloon coupled to a catheter shaft. The catheter shaft includes a guidewire lumen having a lumen diameter. The guidewire includes a coil tip coupled to a guidewire shaft at a proximal joint. A coil diameter of the coil tip at the proximal joint is larger than the lumen diameter of the catheter shaft. The interventional system can be used to access and treat the lesion in the target anatomy. Other embodiments are also described and claimed.
1 . An interventional system, comprising:
a balloon catheter including a balloon coupled to a catheter shaft, wherein the catheter shaft includes a guidewire lumen having a lumen diameter; and
a guidewire removable from the balloon catheter and including a coil tip coupled to a guidewire shaft at a proximal joint, wherein a coil diameter of the coil tip at the proximal joint is larger than the lumen diameter of the catheter shaft, and wherein the proximal joint is radially between the coil tip and the guidewire shaft and includes a proximal face tapering radially inward in a distal direction from the coil tip to the guidewire shaft.
2 . The interventional system of claim 1 , wherein the guidewire shaft has a shaft diameter that is constant between the proximal joint and a proximal shaft end.
3 . The interventional system of claim 2 , wherein the balloon catheter includes a distal tip having a tip inner diameter equal to or less than the shaft diameter.
4 . The interventional system of claim 3 , wherein the tip inner diameter is less than the lumen diameter.
5 . The interventional system of claim 4 , wherein the lumen diameter is equal to or less than 0.011 inch.
6 . The interventional system of claim 2 , wherein the shaft diameter is equal to or less than 0.010 inch.
7 . The interventional system of claim 1 , wherein the proximal face is shaped to receive a distal tip of the balloon catheter.
8 . The interventional system of claim 7 , wherein the proximal face is tapered radially inward from an outer face edge to the guidewire shaft.
9 . The interventional system of claim 7 , wherein the proximal joint includes a marker band between the guidewire shaft and the coil tip, and wherein the proximal face is on the marker band.
10 . A guidewire, comprising:
a guidewire shaft;
a coil tip; and
a proximal joint radially between the guidewire shaft and the coil tip, wherein the proximal joint includes a proximal face shaped to receive a distal tip of a balloon catheter, and wherein the proximal face tapers radially inward in a distal direction from the coil tip to the guidewire shaft.
11 . The guidewire of claim 10 , wherein the guidewire shaft has a shaft diameter that is constant between the proximal joint and a proximal shaft end.
12 . The guidewire of claim 10 , wherein the proximal face is tapered radially inward from an outer face edge to the guidewire shaft.
13 . The guidewire of claim 10 , wherein the proximal joint includes a marker band between the guidewire shaft and the coil tip, and wherein the proximal face is on the marker band.
14 . A method, comprising:
delivering a guidewire into a target anatomy, wherein the guidewire includes a coil tip coupled to a guidewire shaft at a proximal joint, and wherein the coil tip has a coil diameter at the proximal joint, and wherein the proximal joint is radially between the coil tip and the guidewire shaft and includes a proximal face tapering radially inward in a distal direction from the coil tip to the guidewire shaft;
delivering a balloon catheter over the guidewire, wherein the balloon catheter is removably disposed on the guidewire, wherein the balloon catheter includes a balloon coupled to a catheter shaft, and wherein the catheter shaft includes a guidewire lumen having a lumen diameter smaller than the coil diameter; and
advancing the guidewire and the balloon catheter through a lesion in the target anatomy.
15 . The method of claim 14 , wherein the guidewire shaft has a shaft diameter that is constant between the proximal joint and a proximal shaft end.
16 . The method of claim 15 , wherein the balloon catheter includes a distal tip having a tip inner diameter equal to or less than the shaft diameter.
17 . The method of claim 16 , wherein the tip inner diameter is less than the lumen diameter.
18 . The method of claim 14 , wherein the proximal face is shaped to receive a distal tip of the balloon catheter.
19 . The method of claim 18 , wherein the proximal face is tapered radially inward from an outer face edge to the guidewire shaft.
20 . The method of claim 18 , wherein the proximal joint includes a marker band between the guidewire shaft and the coil tip, and wherein the proximal face is on the marker band.