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US 9,011,463 B2Granted
Shock wave balloon catheter with multiple shock wave sources
AssigneeShockwave Medical, Inc.
InventorsJohn Adams, Thomas G. Goff, Doug Hakala
Life of this patent
Estimating the term…
Abstract
An apparatus includes a balloon adapted to be placed adjacent a calcified region of a body. The balloon is inflatable with a liquid. The apparatus further includes a shock wave generator within the balloon that produces shock waves that propagate through the liquid for impinging upon the calcified region adjacent the balloon. The shock wave generator includes a plurality of shock wave sources distributed within the balloon.
Claims14
An angioplasty device comprising:
- an axially extending elongate member;
- a balloon surrounding a portion of the elongate member, said balloon being fillable with a conductive fluid;
- a plurality of electrode pairs located on the elongate member and enclosed within and spaced from the balloon, wherein the electrode pairs are configured to produce shock waves that propagate through the liquid while the balloon remains intact, and wherein there is a first set of two electrode pairs connected in series and a wherein there is a second set of two electrode pairs connected in series and wherein one electrode in each pair has a surface area larger than the surface area of the other electrode in the pair;
- a high voltage source connectable to the electrodes;
- and
- a multiplexer selectively connecting the high voltage source to one or the other of the first and second sets of electrode pairs wherein each of the electrode pairs in the first and second sets includes a positive and negative terminal in spaced apart relation and wherein the series connection of each the first and second sets is completed via an arc in the conductive fluid when the electrodes pairs in the selected set are activated with the high voltage source.
3 more elements
An angioplasty device comprising:
- an axially extending elongate member;
- a balloon surrounding a portion of the elongate member, said balloon being fillable with a conductive fluid;
- a first electrode pair having first and second spaced apart electrodes and a second electrode pair having first and second spaced apart electrodes, said electrode pairs being located on the elongate member and enclosed within and spaced from the balloon, wherein the electrode pairs are configured to produce shock waves that propagate through the liquid while the balloon remains intact and wherein one electrode in each pair has a surface area larger than the surface area of the other electrode in the pair;
- and
- a high voltage source connectable to the first electrode of first electrode pair, and with the second electrode of first pair being connected to the first electrode of the second pair, and with the second electrode of the second pair being connected to the high voltage source, and wherein when a high voltage pulse is supplied to the first and second electrode pairs, a first arc is generated in the conductive fluid across the first electrode pair and a second arc is generated in the conductive fluid across the second electrode pair, thereby creating a series connection running from the first electrode in the first electrode pair to the second electrode of the second pair.
2 more elements
An angioplasty device comprising:
- an axially extending elongate member;
- a balloon surrounding a portion of the elongate member, said balloon being fillable with a conductive fluid;
- a plurality of electrode pairs located on the elongate member and enclosed within and spaced from the balloon, wherein the electrode pairs are configured to produce shock waves that propagate through the liquid while the balloon remains intact and wherein one electrode in each pair has a surface area larger than the surface area of the other electrode in the pair;
- a high voltage source connectable to the electrodes;
- and
- a multiplexer and wherein the plurality of electrode pairs include a first set of two pairs of electrodes with one electrode of one pair being connected to one electrode of the other pair, said electrode pairs further including a second set of two pairs of electrodes with one electrode of one pair being connected to one electrode of the other pair, and wherein said multiplexer selectively connects the high voltage source to one or the other of the first and second sets of electrode pairs, with the connected set operating in series across an arc generated in the conductive fluid at each pair of electrodes.
3 more elements
Dependencies are inferred from the claim text.