| 摘要 |
A catheter and method for transporting a fluid between a body vessel of a patient and a site external of the patient. The catheter comprises a catheter body sized to at least partially extend between the body vessel and the external site. The catheter body has a proximal portion extending toward the external site and a distal portion extending to the body vessel. An inwardly contoured segment is formed in the catheter body at the distal portion, and a valve is formed at the inwardly contoured segment. The valve is operable to open in a first direction when subjected to a first pressure from a side of the valve to permit fluid flow therethrough in the first direction, and in a second direction opposite the first direction when subjected to a second pressure from another side of the valve to permit fluid flow therethrough in the second direction.
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