EP0250891A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Catheter assembly
Assignee: Becton Dickinson and Co
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Filing: 1987-05-30
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Granted: —
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Expires: 2007-05-30
Abstract
Abstract A catheter assembly, with active fluid control valve, includes a catheter (21) having a cylindrical side wall (22) describing a lumen (23) therethrough, a proximal end (25) and a closed distal end (27). The catheter (21) includes a slit (29) through the side wall (22) positioned adjacent to the distal end (27). This slit (29) is angularly oriented with respect to the longitudinal axis of the catheter (21) and is defined by two opposed faces (32,33) formed in the side wall (22). The catheter housing (34) includes a conduit (35) therethrough wherein the proximal end (25) of the catheter (21) is connected to the housing (34) so that the conduit (35) and the lumen (23) are in fluid communication. The stylet (39) is positioned within the lumen (23) having a first end (40) connected to the closed distal end (27) and a second end (41). A valve control knob (44) having a passageway (45) therethrough is rotatably connected to the housing (34) so that the passageway (45) and the conduit (35) are in fluid communication. Engagement structure is provided in the knob (44) for engaging the stylet (39) so that rotation of the knob (44) relative to the housing (34) causes rotation of the stylet (39) which in turn causes rotation of the closed distal end (27) of the catheter (21) causing the opposed faces (32,33) of the slit (29) to separate forming an opening for allowing fluid communication between the lumen (23) and the exterior of the catheter (21).
Inventors
- 👤 Paul G. Alchas
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:57
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0074; A61M25/0075; A61M25/0043; A61M25/005
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
313 words
A catheter assembly with active fluid control valve comprising: a flexible catheter (21) having a cylindrical side wall (22) describing a lumen (23) therethrough, a proximal end (25) and a closed distal end (27); said catheter (21) including at least one slit (29) through said side wall (22) positioned adjacent to said distal end (27), characterized by said slit (29) being angularly oriented with respect to the longitudinal axis of said catheter (21), being defined by two opposed faces (32,33) formed in said side wall (22); a catheter hausing (34) having a conduit (35) therethrough, said proximal end (25) of said catheter (21) being connected to said housing (34) so that said conduit (35) and said lumen (23) are in fluid communication; a stylet wire (39) within said lumen (23) having a first end (40) connected to said closed distal end (27) of said catheter (21) and a second end (41); a valve control knob (44) having a passageway (45) therethrough rotatably connected to said housing (34) so that said passageway (45) and said conduit (35) are in fluid communication; and engagement means in said knob (44) for engaging said stylet (39) so that rotation of said knob (44) relative to said housing (34) in a first rotational direction causes rotation of said stylet (39) which in turn causes rotation of said closed distal end (27) of said catheter (21) causing said opposed faces (32,33) of said slit (29) to separate forming an opening for allowing fluid communication between said lumen (23) and the exterior of said catheter (21) and rotation of said knob (44) relative to said housing (34) in a second rotational direction, opposite to said first rotational direction, causes rotation of said stylet (39), which in turn causes rotation of said closed distal end (27) of said catheter (21) causing said opposed faces (32,33) of said slit (29) to close.
Claim 2
Dependent Claim
313 words
A catheter assembly with active fluid control valve comprising: a flexible catheter (21) having a cylindrical side wall (22) describing a lumen (23) therethrough, a proximal end (25) and a closed distal end (27); said catheter (21) including at least one slit (29) through said side wall (22) positioned adjacent to said distal end (27), characterized by said slit (29) being angularly oriented with respect to the longitudinal axis of said catheter (21), being defined by two opposed faces (32,33) formed in said side wall (22); a catheter hausing (34) having a conduit (35) therethrough, said proximal end (25) of said catheter (21) being connected to said housing (34) so that said conduit (35) and said lumen (23) are in fluid communication; a stylet wire (39) within said lumen (23) having a first end (40) connected to said closed distal end (27) of said catheter (21) and a second end (41); a valve control knob (44) having a passageway (45) therethrough rotatably connected to said housing (34) so that said passageway (45) and said conduit (35) are in fluid communication; and engagement means in said knob (44) for engaging said stylet (39) so that rotation of said knob (44) relative to said housing (34) in a first rotational direction causes rotation of said stylet (39) which in turn causes rotation of said closed distal end (27) of said catheter (21) causing said opposed faces (32,33) of said slit (29) to separate forming an opening for allowing fluid communication between said lumen (23) and the exterior of said catheter (21) and rotation of said knob (44) relative to said housing (34) in a second rotational direction, opposite to said first rotational direction, causes rotation of said stylet (39), which in turn causes rotation of said closed distal end (27) of said catheter (21) causing said opposed faces (32,33) of said slit (29) to close.
Claim 3
Dependent Claim
29 words
The catheter assembly of claim l further including stiffening means for increasing the torsional rigidity of said catheter (21) positioned between said catheter housing (34) and said slit (29).
Claim 4
Dependent Claim
32 words
The catheter assembly of claim 2 wherein said stiffening means includes a cylindrically shaped stiffening member (37) positioned within said lumen (23) extending from said catheter housing (34) toward said slit (29).
Claim 5
Dependent Claim
38 words
The catheter assembly of claim 3 wherein said stiffening member (37) has a larger outside diameter than the inside diameter of said catheter (21) so that when assembled said catheter (21) is stretched over said stiffening member (37).
Claim 6
Dependent Claim
36 words
The catheter assembly of claim 2 wherein said stiffening means includes a portion of said catheter having a smaller inside diameter making said side wall thicker along the catheter between said catheter housing and said slit.
Claim 7
Dependent Claim
27 words
The catheter assembly of one of claims 1 - 5 wherein there is a plurality of slits (63) all being positioned adjacent to said distal end (62).
Claim 8
Dependent Claim
24 words
The catheter assembly of one of claims 1 - 6 wherein said slit (29;63) is substantially straight and said opposed faces being substantially planar.
Claim 9
Dependent Claim
39 words
The catheter assembly of one of claims 1 - 7 wherein said slit (29;63) is oriented at an angle (A) within the range of about 10° to 80° with respect to the longitudinal axis (31;64) of said catheter (21;61).
Claim 10
Dependent Claim
39 words
The catheter assembly of one of claims 1 - 7 wherein said slit (29;63) is oriented at an angle (A) within the range of about 20° to 40° with respect to the longitudinal axis (31;64) of said catheter (21;61).
Claim 11
Dependent Claim
20 words
The catheter assembly of one of claims 1 - 6 and 8 or 9 wherein said slit is curvilinearly shaped.
Claim 12
Dependent Claim
79 words
The catheter assembly of one of claims 1 - 10 wherein said engagement means includes a slot (51) in said knob (44) on both sides of said passageway (45) and slot engaging means at said second end (41) of said stylet (39), said slot engaging means being positioned within said slot (51) on both sides of said passageway (45) so that rotation of said knob (44) with respect to said housing (34) will cause said stylet (39) to rotate.
Claim 13
Dependent Claim
35 words
The catheter assembly of claim 11 wherein said slot engaging means includes a loop-shaped structure (43) formed in said second end (41) of said stylet wire (39) comprising a portion of said stylet wire (39).
Claim 14
Dependent Claim
36 words
The catheter assembly of one of claims 1 - 12 wherein said passageway (45) at the proximal end (58) of said knob (44) is frusto-conically shaped for accepting the tapered tip of a fluid transfer device.
Claim 15
Dependent Claim
77 words
The catheter assembly of one of claims 1 - 13 wherein said passageway (45), said conduit (35) and said lumen (23) forming a continuous fluid path for allowing introduction of fluids into a patient or removal of fluids from a patient when said knob (44) is rotated to open said slit (29;63); and further including stop means (52,55) for limiting the rotational movement of said knob (44) with respect to said housing (34) to less than 360°.
Claim 16
Dependent Claim
51 words
The catheter assembly of claim 14 further including position indicia on said housing (34) and indicator means on said knob (44) positioned so that the user can determine whether said slit (29;63) is open or closed, by observing the relative position of said indicator means with respect to said position indicia.
Claim 17
Dependent Claim
62 words
The catheter assembly of one of claims 1 - 15 further including biasing means for biasing said knob (44) in a rotational direction with respect to said housing (34) so that said slit (29;63) will be normally closed, said biasing means being capable of returning said slit (29;63) to a closed position when said knob (44) is free of externally applied forces.
Claim 18
Dependent Claim
15 words
The catheter assembly of claim 3 wherein said stiffening member is made of thermoplastic material.
Claim 19
Dependent Claim
31 words
The catheter assembly of one of claims 1 - 17 wherein said catheter (21) is made from materials selected from the group consisting of natural rubber, synthetic rubber and thermoplastic elastomers.
Claim 20
Dependent Claim
12 words
The catheter assembly of claim 18 wherein the thermoplastic elastomer is polyurethane.
References Cited (Backward Citations)
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