Sample collection using catheter with expandable member
First Claim
1. A method for taking a liquid or tissue bodily sample from a desired location along a blood vessel of a patient and collecting said sample outside the body to facilitate treatment of the patient, comprising:
- providing a sampling probe in the form of an elongate vascular catheter having a proximal portion that remains outside the body and a distal portion that can be located in the blood vessel during use, said distal portion including an expandable member that can be selectively expanded to larger diameter and contracted to smaller diameter,said expandable member including a membrane thereon with openings that communicate with a source of suction force controllable from the proximal portion that remains outside the body,positioning said expandable portion at a desired location within said blood vessel,taking said sample by exposing said membrane by expanding said expandable portion to place said membrane in proximity with the wall of said blood vessel so that said liquid or tissue bodily sample is received by said membrane,contracting said expandable portion to said smaller diameter,removing said catheter from said patient, andcollecting said sample outside the body.
4 Assignments
0 Petitions
Accused Products
Abstract
Taking a bodily sample from deep within the body of a patient and collecting the sample outside the body to facilitate treatment of the patient. A sampling probe is provided in the form of an elongate catheter having a proximal portion that remains outside the body and a distal portion that can be located within the body. The distal portion includes a membrane with openings that communicate with space that communicates with a source of suction force. The catheter is positioned within the body. The sample is taken by exposing the membrane by placing it in proximity with a desired location so that the bodily sample is received by the membrane. The catheter is removed from the patient and the sample is collected outside the body.
141 Citations
18 Claims
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1. A method for taking a liquid or tissue bodily sample from a desired location along a blood vessel of a patient and collecting said sample outside the body to facilitate treatment of the patient, comprising:
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providing a sampling probe in the form of an elongate vascular catheter having a proximal portion that remains outside the body and a distal portion that can be located in the blood vessel during use, said distal portion including an expandable member that can be selectively expanded to larger diameter and contracted to smaller diameter, said expandable member including a membrane thereon with openings that communicate with a source of suction force controllable from the proximal portion that remains outside the body, positioning said expandable portion at a desired location within said blood vessel, taking said sample by exposing said membrane by expanding said expandable portion to place said membrane in proximity with the wall of said blood vessel so that said liquid or tissue bodily sample is received by said membrane, contracting said expandable portion to said smaller diameter, removing said catheter from said patient, and collecting said sample outside the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 16, 17, 18)
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10. A kit for treating a patient by collecting a liquid or tissue sample from a blood vessel of the patient that can be analyzed to determine physiological function, comprising:
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a sampling probe in the form of an elongate vascular catheter having a proximal portion that remains outside the body and a distal portion that can be located in the blood vessel, said distal portion including an expandable member that can be selectively expanded to larger diameters and contracted to smaller diameter, said expandable member including a membrane on at least a part of an outside surface of said expandable member, said membrane including openings that may receive said liquid or tissue sample and which communicate a suction device, controllable from proximal portions outside the body, for creating a suction force through said openings to draw bodily sample into said storage space, and apparatus for facilitating collection and analysis of said sample outside the body to determine physiological function.
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11. A method for taking a liquid or tissue bodily sample from deep within the body of a patient and collecting said sample outside the body to facilitate treatment of the patient, comprising:
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providing a sampling probe in the form of an elongate catheter having a proximal portion that remains outside the body and a distal portion that can be located within the body, said distal portion including an expandable member that can be selectively expanded to larger diameters and contracted to smaller diameter, said expandable member including a membrane on at least a part of an outside surface of said expandable member, said membrane including openings that communicate with a suction device, controllable from proximal portions outside the body, positioning said catheter within the body, taking said liquid or tissue sample by expanding said expandable member to place said membrane in proximity to a desired location so that said bodily sample is received by said membrane, removing said catheter from said patient, and collecting said sample outside the body. - View Dependent Claims (12)
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Specification