Triple-lumen critical care catheter
First Claim
1. A multiple-lumen intravenous catheter for critical-care applications, said catheter comprising an elongated cylindrical tube having a first septum dividing the interior of the catheter into a large lumen having an elliptical cross section, and a smaller lumen having a crescent-shaped cross section, the smallest diameter of said elliptical cross section being larger than the radius of the interior of the catheter, and a second septum dividing the crescent-shaped lumen into two small lumens.
1 Assignment
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Accused Products
Abstract
A multiple-lumen intravenous catheter for critical-care applications comprises an elongated cylindrical tube. This tube has a first septum dividing the interior of the catheter into a large lumen having an elliptical cross section, and a smaller lumen having a crescent-shaped cross section. The smallest diameter of the elliptical cross section is larger than the radius of the interior of the catheter. A second septum divides the crescent-shaped lumen into two small lumens.
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Citations
13 Claims
- 1. A multiple-lumen intravenous catheter for critical-care applications, said catheter comprising an elongated cylindrical tube having a first septum dividing the interior of the catheter into a large lumen having an elliptical cross section, and a smaller lumen having a crescent-shaped cross section, the smallest diameter of said elliptical cross section being larger than the radius of the interior of the catheter, and a second septum dividing the crescent-shaped lumen into two small lumens.
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10. A method of using a multiple-lumen intravenous catheter with a critically-ill patient, said multiple-lumen catheter including an elongated cylindrical tube having a first septum dividing the interior of the catheter into a large lumen having an elliptical cross section, and a smaller lumen having a crescent-shaped cross section, the smallest diameter of said elliptical cross section being larger than the radius of the interior of the catheter, and a second septum dividing the crescent-shaped lumen into two small lumens, the method comprising the steps of:
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inserting the catheter into a vein of a patient; infusing a fluid into the vein through the large lumen; and monitoring the hydrostatic pressure in the vein through one of the other lumens.
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11. A method of using a multiple-lumen intravenous catheter with a critically-ill patient, said multiple-lumen catheter including an elongated cylindrical tube having a first septum dividing the interior of the catheter into a large lumen having an elliptical cross section, and a smaller lumen having a crescent-shaped cross section, the smallest diameter of said elliptical cross section being larger than the radius of the interior of the catheter, and a second septum dividing the crescent-shaped lumen into two small lumens, the method comprising the steps of:
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inserting the catheter into a vein of a patient; infusing a first fluid into the vein through the large lumen; monitoring the hydrostatic pressure in the vein through one of the other lumens; and infusing a second fluid into the vein through the third lumen.
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12. A method of using a multiple-lumen intravenous catheter with a critically-ill patient, said multiple-lumen catheter including an elongated cylindrical tube having a first septum dividing the interior of the catheter into a large lumen having an elliptical cross section, and a smaller lumen having a crescent-shaped cross section, the smallest diameter of said elliptical cross section being larger than the radius of the interior of the catheter, and a second septum dividing the crescent-shaped lumen into two small lumens, the method comprising the steps of:
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inserting the catheter into a vein of a patient; infusing a first fluid into the vein through the large lumen; monitoring the hydrostatic pressure in the vein through one of the other lumens; and injecting a medication into the vein through the third lumen.
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13. A method of using a multiple-lumen intravenous catheter with a critically-ill patient, said multiple-lumen catheter including an elongated cylindrical tube having a first septum dividing the interior of the catheter into a large lumen having an elliptical cross section, and a smaller lumen having a crescent-shaped cross section, the smallest diameter of said elliptical cross section being larger than the radius of the interior of the catheter, and a second septum dividing the crescent-shaped lumen into two small lumens, the method comprising the steps of:
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inserting the catheter into a vein of a patient; infusing a first fluid into the vein through the large lumen; monitoring the hydrostatic pressure in the vein through one of the other lumens; and withdrawing blood from the vein through the third lumen.
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Specification