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US 2001/0041872 A1Published application
Medical fluid flow control valve
AssigneeCook Incorporated
InventorRAM H. PAUL JR.
Life of this patent
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AssigneeCook Incorporated
InventorRAM H. PAUL JR.
Estimating the term…
A valve (10) useful as a fluid flow check valve or as a self-sealing, penetrable, hemostatic valve for sealing a catheter introducer (12) includes a seal (26) which is highly resistant to tearing and leakage, yet is capable of accepting repeated penetrations by devices of a wide variety of diameters. The seal (26) is disk-shaped and is composed of a thermoplastic styrenic elastomer, such as a styrene-ethylene/butylene-styrene block copolymer, of very low durometer (a hardness of no more than about 30 Shore A). The seal (26) is preferably contained in a valve body (40) and is compressed between a valve seat (48) in the valve body (40) and a cap (56) connected to the valve body (40). The seal (26) includes at least one perforation (34) closed by such compression. This compression also provides the seal (26) with a proximal or upstream concave surface (30), making it highly resistant to inversion during repeated removals and manipulations of interventional devices passing through the valve (10). The valve (10) of the present invention is particularly advantageous in that it seals the introducer (12) with a high degree of effectiveness when no interventional device lies across its seal (26), and in that it offers a high resistance to tearing when penetrated by devices of large diameter. The valve (10) also allows the easy passage of devices without interfering with tactile feedback (“feel”) from them.
A valve arrangement for controlling the flow of fluid through a medical device, wherein the arrangement comprises a seal (26) to be disposed in the fluid flow, at least one aperture to be found in the seal to permit fluid flow through the seal, and means (38, 56) for causing the material of the seal at least in the region of the or each perforation to close the perforation(s).
A valve (10) for a fluid flow path (14) of a medical device, comprising:
A valve (10) for a fluid flow path (14), comprising:
In a valve (10) for a fluid flow path (14), the valve (10) including a perforate elastomeric disk (28) closing the flow path (14), the improvement wherein the disk (28) is composed of a thermoplastic styrene-ethylene/butylene-styrene block copolymer having a hardness of no more than about 30 Shore A.
In a self-sealing, penetrable, hemostatic valve (10) for an introducer (12) for a catheter (20) or other interventional device, the catheter (20) or other interventional device having a proximal end (22), and the valve (10) including a generally disk-shaped seal (26) receiving and sealing around the periphery of the catheter (20) or other interventional device when inserted in the introducer (12), the improvement wherein the seal (26) is composed of a thermoplastic styrene-ethylene/butylene-styrene block copolymer having a hardness of no more than about 30 Shore A, and wherein the seal (26) is compressed so as to present a concave face (30) towards the proximal end (22) of the catheter (20) or other interventional device.
Dependencies are inferred from the claim text.