Needle-less injection apparatus and method
First Claim
1. A catheter system for delivering a fluid to heart tissue, comprising:
- a pressurized fluid source containing a fluid therein, the pressurized fluid source generating a high transient pressure sufficient to pierce bodily tissue; and
an injection catheter including an elongate shaft having a proximal end, a distal end and an infusion lumen extending therein, the proximal end of the shaft connected to the pressurized fluid source, the infusion lumen in fluid communication with the fluid contained in the pressurized fluid source, the distal end of the shaft including a nozzle having an injection port in fluid communication with the infusion lumen such that fluid from the pressurized fluid source may be delivered to the heart tissue via the infusion lumen of the shaft and the injection port at a sufficient exit velocity to partially penetrate the heart tissue.
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Accused Products
Abstract
A device and method for delivering and injecting fluid into heart tissue utilizing high pressure injection to increase injectate (fluid) retention in the heart tissue. The catheter includes a shaft having an infusion lumen extending therethrough, wherein the proximal end of the shaft connected to a pressurized fluid source capable of generating a transient pressure of more than 1000 psi. The distal end of the shaft includes a nozzle having an injection port in fluid communication with the infusion lumen such that fluid from the pressurized fluid source may be delivered to the heart tissue at a sufficiently high exit velocity to partially penetrate the heart tissue.
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Citations
18 Claims
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1. A catheter system for delivering a fluid to heart tissue, comprising:
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a pressurized fluid source containing a fluid therein, the pressurized fluid source generating a high transient pressure sufficient to pierce bodily tissue; and
an injection catheter including an elongate shaft having a proximal end, a distal end and an infusion lumen extending therein, the proximal end of the shaft connected to the pressurized fluid source, the infusion lumen in fluid communication with the fluid contained in the pressurized fluid source, the distal end of the shaft including a nozzle having an injection port in fluid communication with the infusion lumen such that fluid from the pressurized fluid source may be delivered to the heart tissue via the infusion lumen of the shaft and the injection port at a sufficient exit velocity to partially penetrate the heart tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of delivering a fluid to an injection site in heart tissue of a patient, comprising the steps of:
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providing a pressurized fluid source containing a fluid therein, the pressurized fluid source generating a high transient pressure sufficient to pierce bodily tissue;
providing an injection catheter comprising a shaft having a proximal end, a distal end and an infusion lumen extending therein, the distal end of the catheter including a nozzle and an injection port;
inserting the injection catheter into the patient;
navigating the catheter until the distal end of the catheter is positioned adjacent the injection site; and
actuating the fluid source to inject fluid into the heart tissue via the infusion lumen of the shaft and the injection port at a sufficient exit velocity to partially penetrate the heart tissue.
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Specification