Catheter introducer sheath assembly
First Claim
1. A catheter introducer kit comprising in combination a catheter introducer sheath assembly and a catheter containing a vena-cava filter and a stabilizer for placement of said filter, said catheter introducer sheath assembly comprising the combination of an elongated, flexible introducer sheath defining a passage and a closure device having a through passage extending between proximal and distal ends, said introducer sheath joined to the distal end of said closure device, the passages through said sheath and said closure device having a diameter sufficient to pass said catheter therethrough, said closure device comprising the combination of a resilient member at least partially defining said throughpassage of said closure device, said throughpassage having an axis;
- a body including first and second relatively rotatable body portions, said first body portion being stationary with respect to said resilient member and said second body portion including an internal cam having a cam surface oriented about and spaced from the axis of said throughpassage with a first surface portion disposed relatively closer to said axis than a circumferentially spaced second surface portion; and
a compression member positioned in a radially extending aperture in said first body portion and biased radially outward by said resilient member to maintain contact with said cam surface,said members of said combination of said closure device cooperatively related to enable adjustment of the radial compression of said resilient member for closing or opening said passage by relative rotation of said second body portion with respect to said first body portion to position, in dependent manner, said compression member radially closer to or further from said axis to close or open said throughpassage or to engage, with desired tightness, the said catheter or a guidewire extending or sliding through said closure device and sheath.
2 Assignments
0 Petitions
Accused Products
Abstract
A catheter introducer sheath assembly, for introduction into a body passage of a catheter containing a filter comprises a flexible introducer sheath joined to the distal end of a closure device forming a through-passage with a diameter sufficient to pass the catheter therethrough. The closure device has a resilient member in the through-passage and two rotatable body portions, one stationary with respect to the resilient member, and the other rotatable about the axis of the resilient member with an internal cam circumferentially spaced around the axis. A compression member positioned radially in an extending aperture makes contact with both the resilient member and the cam surface to vary the through-passage allowing the operator to manually control the passage of the device. The sheath assembly receives a cathetory guidewire that slides through and extends beyond the closure device and the sheath. In another aspect, the combination sheath assembly and closure device forms a catheter introducer kit constructed to receive a stabilizer and a catheter of sufficiently large diameter to house a vena cava filter, and to pass the filter through the closure device and sheath for placement in the body by means of a dilator attached to the end of the sheath to facilitate guiding the filter to the desired position for its release from the sheath. The closure device is adjustable to prevent any backflow of fluid such as blood from the assembly during the filter placement procedure.
-
Citations
23 Claims
-
1. A catheter introducer kit comprising in combination a catheter introducer sheath assembly and a catheter containing a vena-cava filter and a stabilizer for placement of said filter, said catheter introducer sheath assembly comprising the combination of an elongated, flexible introducer sheath defining a passage and a closure device having a through passage extending between proximal and distal ends, said introducer sheath joined to the distal end of said closure device, the passages through said sheath and said closure device having a diameter sufficient to pass said catheter therethrough, said closure device comprising the combination of a resilient member at least partially defining said throughpassage of said closure device, said throughpassage having an axis;
-
a body including first and second relatively rotatable body portions, said first body portion being stationary with respect to said resilient member and said second body portion including an internal cam having a cam surface oriented about and spaced from the axis of said throughpassage with a first surface portion disposed relatively closer to said axis than a circumferentially spaced second surface portion; and a compression member positioned in a radially extending aperture in said first body portion and biased radially outward by said resilient member to maintain contact with said cam surface, said members of said combination of said closure device cooperatively related to enable adjustment of the radial compression of said resilient member for closing or opening said passage by relative rotation of said second body portion with respect to said first body portion to position, in dependent manner, said compression member radially closer to or further from said axis to close or open said throughpassage or to engage, with desired tightness, the said catheter or a guidewire extending or sliding through said closure device and sheath. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12, 13, 14)
-
-
8. A catheter introducer sheath assembly comprising the combination of an elongated, flexible introducer sheath defining a passage and a closure device having a through passage extending between proximal and distal ends, said introducer sheath joined to the distal end of said closure device, the passage through said sheath and the throughpassage through said closure device having diameters sufficient to pass a respective catheter therethrough,
said closure device comprising the combination of a resilient member at least partially defining said throughpassage of said closure device, said throughpassage having an axis; -
a body including first and second relatively rotatable body portions, said first body portion being stationary with respect to said resilient member and said second body portion including an internal cam having a cam surface oriented about and spaced from the axis of said throughpassage with a first surface portion disposed relatively closer to said axis than a circumferentially spaced second surface portion; and a compression member positioned in a radially extending aperture in said first body portion and biased radially outward by said resilient member to maintain contact with said cam surface, said members of said combination of said closure device cooperatively related to enable adjustment of the radial compression of said resilient member for closing or opening said throughpassage by relative rotation of said second body portion with respect to said first body portion to position, in dependent manner, said compression member radially closer to or further from said axis to close or open said throughpassage or to engage, with desired tightness, a catheter or guidewire extending or sliding through said closure device and sheath and wherein said cam defines a smooth spiral-form surface. - View Dependent Claims (9, 10, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
Specification