Surgery – Blood drawn and replaced or treated and returned to body – Body inserted tubular conduit structure
Reexamination Certificate
2007-10-02
2007-10-02
Zalukaeva, Tatyana (Department: 3761)
Surgery
Blood drawn and replaced or treated and returned to body
Body inserted tubular conduit structure
C604S043000, C604S523000
Reexamination Certificate
active
10059925
ABSTRACT:
A catheter comprises an elongated tube having an interior defined by a sidewall having openings. At least a portion of the catheter is spirally formed into a corkscrew pattern or has an inwardly spiraling portion with at least one opening coincident therewith. Additionally or alternatively, the catheter comprises a septum that divides the interior into at least first and second lumens. The first and second lumens may form a double helix in a portion of the catheter coincident with the plurality of openings or along the entire length of the catheter. Methods of manufacturing the catheters involve extruding the portion of the catheter having the openings, making this portion separately then attaching it to another catheter, or heating and deforming a portion of a catheter to form a tip portion. The catheter can be used for hemodialysis by drawing blood through one lumen and returning it through another.
REFERENCES:
patent: 4134402 (1979-01-01), Mahurkar
patent: 4661094 (1987-04-01), Simpson
patent: 4681570 (1987-07-01), Dalton
patent: 4694838 (1987-09-01), Wijayarthna et al.
patent: 4795439 (1989-01-01), Guest
patent: 4813925 (1989-03-01), Anderson et al.
patent: 4850969 (1989-07-01), Jackson
patent: 4995865 (1991-02-01), Gahara et al.
patent: 5190520 (1993-03-01), Fenton et al.
patent: 5201723 (1993-04-01), Quinn
patent: 5509897 (1996-04-01), Twardowski et al.
patent: 5554114 (1996-09-01), Wallace et al.
patent: 5873865 (1999-02-01), Horzewski et al.
patent: 6117106 (2000-09-01), Wasicek et al.
patent: 6193685 (2001-02-01), Goodin
patent: 0 386 408 (1990-09-01), None
International Search Report for corresponding PCT application No. PCT/US03/02603, mailed Jun. 27, 2003.
Berry Michelle M.
Heath Kevin R.
Deak Leslie R.
Sci-Med Life Systems, Inc.
Zalukaeva Tatyana
LandOfFree
Occlusion-resistant catheter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Occlusion-resistant catheter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Occlusion-resistant catheter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3889870