Infusion catheters with slit valves and of simplified construction
First Claim
1. A catheter for delivering a fluid to a patient comprising a tube, said tube comprising a lumen and wall with delivery slits in said wall, wherein said tube has an outside diameter of about 0.020 to about 0.125 inches, wherein said delivery slits are in an infusion segment of the tube, wherein said infusion segment includes at least one slit per inch, wherein said catheter has a cracking pressure of at least 0.1 psi, wherein said catheter does not comprise a spring, a membrane or a wick in said lumen.
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Abstract
The present invention relates to catheters to deliver a fluid to a patient. A catheter of the invention comprises a plurality of slits through which the fluid is delivered to the patent. A catheter of the invention is designed in a simple manner to lower costs and provide a reliable means to deliver fluids to a patient. The invention further comprises methods for making a catheter of the invention and methods of delivering a fluid to a patient with a catheter of the invention.
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Citations
20 Claims
- 1. A catheter for delivering a fluid to a patient comprising a tube, said tube comprising a lumen and wall with delivery slits in said wall, wherein said tube has an outside diameter of about 0.020 to about 0.125 inches, wherein said delivery slits are in an infusion segment of the tube, wherein said infusion segment includes at least one slit per inch, wherein said catheter has a cracking pressure of at least 0.1 psi, wherein said catheter does not comprise a spring, a membrane or a wick in said lumen.
- 13. A method for delivering a fluid to a patient comprising delivering said fluid with a catheter, said catheter comprising a tube, said tube comprising a lumen and wall with delivery slits in said wall, wherein said tube has an outside diameter of about 0.020 to about 0.125 inches, wherein said delivery slits are in an infusion segment of the tube, wherein said infusion segment includes at least one slit per inch, wherein said catheter has a cracking pressure of at least 0.1 psi, wherein said catheter does not comprise a spring, a membrane or a wick in said lumen.
- 17. A method for making a catheter comprising taking a catheter tube and generating a delivery slit in said catheter tube with a device selected from the group consisting of a lancet, a needle, a pointed needle, a round needle, a blade, and a beveled blade, wherein said delivery slits are in an infusion segment of the tube, wherein said infusion segment includes at least one slit per inch, wherein said catheter has a cracking pressure of at least 0.1 psi, and wherein said method does not comprise inserting a spring, a membrane or a wick in the said catheter tube.
Specification