Fluid jet PMR
First Claim
1. A catheter for forming holes in the myocardium of a heart chamber wall, said catheter having a distal region and a proximal region, said catheter comprising:
- an elongate tubular shaft having a length, a first lumen therethrough, and a distal nozzle in fluid communication with said first lumen;
a valve disposed along said elongate shaft length for controlling fluid flow through said lumen and being in fluid communication with said lumen; and
means for controlling said valve from said tubular shaft proximal region.
2 Assignments
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Accused Products
Abstract
Devices and methods for performing myocardial revascularization using fluid jets. Devices can include a pressurized fluid source coupled through fluid supply lumens to a distal-most nozzle disposed on the distal end of the catheter. Some devices have separate myocardial revascularization catheters disposed within guide catheters, while other devices have unitary devices including a generally steerable myocardial revascularization catheter shaft. Preferred embodiments include a distally disposed control valve. One valve is controlled using an electrically actuated device, another valve is controlled using a low-pressure control fluid, while yet another device valve is controlled using an axially slidable activation wire. The fluid valve can include a biasing spring to shut the valve and preclude fluid flow, with the bias opposed by a user-applied fluid, mechanical, or electrical force. One device includes a radially expandable distal catheter portion, which expands under pressure to present a significantly larger distal profile. The inflated distal region may be forced against a heart chamber wall, and can provide a larger surface area and improved seal. One catheter includes an intermediate expandable tubular anchor portion. Fluid used in the devices can include saline, revascularization enhancing therapeutic substances, angiogenic promoting substances, and radiopaque contrast media, all of which can be injected at the same time.
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Citations
42 Claims
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1. A catheter for forming holes in the myocardium of a heart chamber wall, said catheter having a distal region and a proximal region, said catheter comprising:
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an elongate tubular shaft having a length, a first lumen therethrough, and a distal nozzle in fluid communication with said first lumen;
a valve disposed along said elongate shaft length for controlling fluid flow through said lumen and being in fluid communication with said lumen; and
means for controlling said valve from said tubular shaft proximal region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 41, 42)
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19. A catheter for forming holes in the myocardium of a heart chamber wall, said catheter having a distal region and a proximal region, said catheter comprising:
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an elongate tubular shaft having a length, a first lumen therethrough, and a distal nozzle in fluid communication with said lumen;
a valve disposed along said elongate shaft length for controlling fluid flow through said lumen; and
a valve actuator for controlling said valve from said tubular shaft proximal region.
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37. A method for performing myocardial revascularization from within a heart chamber having a wall, the method comprising forming holes in the myocardium using at least one fluid jet.
Specification