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WO1999038550A1 - Catheter a lumieres multiples et extremite elargie - Google Patents

Catheter a lumieres multiples et extremite elargie Download PDF

Info

Publication number
WO1999038550A1
WO1999038550A1 PCT/US1999/001969 US9901969W WO9938550A1 WO 1999038550 A1 WO1999038550 A1 WO 1999038550A1 US 9901969 W US9901969 W US 9901969W WO 9938550 A1 WO9938550 A1 WO 9938550A1
Authority
WO
WIPO (PCT)
Prior art keywords
tip member
lumen
area
catheter
body portion
Prior art date
Application number
PCT/US1999/001969
Other languages
English (en)
Inventor
Margo L. Gisselberg
Original Assignee
Tyco Group S.A.E.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyco Group S.A.E.L. filed Critical Tyco Group S.A.E.L.
Priority to AU25680/99A priority Critical patent/AU2568099A/en
Publication of WO1999038550A1 publication Critical patent/WO1999038550A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/0069—Tip not integral with tube
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A61M25/0026—Multi-lumen catheters with stationary elements
    • A61M25/003—Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves
    • A61M2025/0031—Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023—Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A61M25/0026—Multi-lumen catheters with stationary elements
    • A61M2025/0037—Multi-lumen catheters with stationary elements characterized by lumina being arranged side-by-side

Definitions

  • the present invention relates generally to catheters for use on a human patient and more particularly to a multiple lumen catheter having an improved catheter tip. More particularly, the present invention includes a reinforced wall adjacent to a portion of the tip member and also preferably a lumen for the passage of a guide wire therethrough.
  • Single or multiple lumen catheters are well known in the medical field and are widely used in medical procedures such as he odialysis or other procedures wherein it is desirable to inject or remove fluids through one or more lumens of the catheter.
  • the currently available single or multiple lumen catheters frequently have an opening at the distal end thereof and one or more openings or holes along the sidewall of the catheter.
  • the arterial or intake lumen is used to remove blood from the patient.
  • This intake lumen typically opens along the sidewall of the catheter.
  • the side opening may occasionally become completely or partially occluded by the interior wall of the patient's blood vessel. The complete or partial occlusion of the side opening will significantly reduce the flow of blood through the intake lumen of the catheter and - 2 -
  • one or more relatively large side openings are used. ith these side openings it is typically recommended that the flow of fluid through the side opening be checked prior to hemodialysis. If the side opening is occluded, it is recommended that the catheter be rotated or otherwise repositioned.
  • a further difficulty with the use of the large single side opening is that the side opening may occasionally get caught on the tissue or the wall of the blood vessel during insertion into the patient.
  • Yet another difficulty with the use of a large single side opening is that the catheter may kink or bend at the side opening during insertion if the catheter tip meets resistance during insertion because the large side opening may weaken the column strength of the catheter.
  • the use of multiple side openings in a catheter provides an increased likelihood that a clot may form along or in one or more of the side openings as compared to the likelihood of clotting in catheters with a single side opening for each lumen.
  • This increased likelihood of clot formation is believed to be caused, at least partially, by the presence of multiple surfaces between each of the side openings which may provide an area of reduced flow in the lumen which allows the clot to form thereon.
  • U.S. Patent No. 4,808,155 granted to Mahurkar is directed to a dual lumen catheter which is used primarily for hemodialysis.
  • the catheter disclosed in this patent includes side by side lumens for the infusion and withdrawal of the patient's blood. As shown, the withdrawal lumen is substantially shorter than the infusion lumen to minimize the mixing of the treated and untreated blood of the patient.
  • the present invention is intended to provide an improved tip for a catheter.
  • the catheter tip preferably minimizes whipping or bending of the catheter tip while reducing the mixing of fluids from the catheter. Additionally, the present invention enables the physician to insert the catheter using conventional placement techniques while reducing the likelihood of positional occlusion of the catheter.
  • the catheter includes a pair of side by side lumens which extend from the proximal end portion of the tubing to the distal end portion of the tubing.
  • the tip portion is preferably attached to the distal end portion of the tubing and includes distal and proximal end portions thereon.
  • the preferred form of the catheter is a dual lumen catheter having at least one generally D shaped lumen therein.
  • the catheter preferably includes a blood return or first lumen which extends between the proximal end portion of the catheter and the distal end portion of the catheter tip.
  • the other lumen is preferably an intake or second lumen which extends between the proximal end portion of the catheter and a side opening generally at the interconnection of the distal end portion of the catheter and the proximal end portion of the catheter tip.
  • the tip portion preferably includes distal and proximal end portions wherein the connection portion is located along the proximal end portion of the tip and the distal end portion is generally bulbous shaped with a relatively small guide wire passing lumen extending therethrough.
  • the sidewall of the tubing portion of the distal end portion of the catheter preferably extends beyond the opening of the second lumen on the side of the catheter which is opposite opening to reinforce the catheter to minimize buckling.
  • Another object of the present invention is to prevent clotting by providing a side opening in the sidewall of a catheter which is shaped and oriented to be essentially self flushing such that external fluid flow may pass directly from the proximal side of the side opening to the distal side of the side opening without interruption.
  • Yet another object of the present invention is to reduce vessel wall occlusion by providing a side opening which maximizes the open passageway for fluid flow even when a portion of the slot is occluded by or sucked against a portion of the vessel wall.
  • Figure 1 is an elevated view of a catheter of the present invention
  • Figure 2 is an enlarged elevated view of the distal portion of the embodiment shown in Figure 1;
  • Figure 3 is an enlarged side view of the distal portion of the embodiment shown in Figure 1;
  • Figure 4 is an enlarged cross-sectional view of the distal portion of the embodiment shown in Figure 1, taken generally along lines 4-4 of Figure 2;
  • Figure 5 is a cross-sectional view of the embodiment shown in Figure 1 taken generally along lines 5-5 of Figure 2
  • Figure 6 is a cross-sectional view of the embodiment shown in Figure 1 taken generally along lines 6-6 of Figure 2 ;
  • Figure 7 is an end view of the catheter of Figure 1.
  • the catheter assembly 10 generally includes an elongate and slightly oval-shaped body portion 12 having a tip member 14 on the distal end thereof and a Y-shaped connector hub 16 on the proximal end thereof. As shown in - 6 -
  • the proximal end of the Y-connector includes extension members 18 and 20 thereon.
  • the extension members 18 and 20 may be bent as shown or straight (not shown) .
  • proximal is intended to refer to the end or portion of a member which is normally oriented or positioned away from the patient while the term “distal” refers to the end or portion of a member in use which is nearest to the patient.
  • distal refers to the end or portion of a member in use which is nearest to the patient.
  • the body portion 12 of the preferred embodiment of the catheter assembly 10 is hollow except for a generally flat, longitudinal septum 22 which divides the interior of the hollow cylinder into two preferably parallel lumens 24 and 26, with each lumen, 24 and 26, having a generally D-shaped cross section.
  • the lumen 24 is the blood intake or arterial lumen
  • the lumen 26 is the blood return or venous lumen when this invention is used for a procedure such as hemodialysis.
  • the exterior surface of the body portion 12 preferably merges smoothly into the tip member 14.
  • the body of the tip member 14 is preferably formed by injection molding and may be adhesively, heat or otherwise attached or bonded to the distal end portion of the body portion in a conventional manner. Additionally, the tip may also be insert molded directly onto the distal end portion of the body portion.
  • the tip member preferably includes three areas.
  • the proximal area 15 is the connection area where the tip member 14 and body portion 12 are interconnected. As shown in the drawings, the proximal area 15 is generally staggered so that the outer wall of the body portion 12 which is oriented adjacent to the side of the intake lumen 24 is proximal to the portion of the body portion 12 which - 7 -
  • the proximal side of the proximal area 15 generally forms the opening 30 for the intake lumen 24.
  • the middle portion of the tip member 14 is generally referred to as the flow passage area 17.
  • the flow passage area 17 preferably includes a pair of flow directing inner surfaces.
  • the proximal inner surface 32 directs the flow of fluid from the blood vessel of the patient into the catheter when the catheter is used for hemodialysis and has sufficient surface area and tapered surfaces to minimize the likelihood that the opening 30 for the intake lumen 24 will not be caught against the wall of the blood vessel. Additionally, the proximal inner surface 32 is shaped to disperse any fluids which are injected into the blood vessel of the patient through this lumen when the flow of fluids is reversed.
  • the distal inner surface 34 of the flow passage area 17 is adjacent to the opening 28 for the return lumen 26 to disperse and direct the fluids passing from the opening 28 into the blood vessel of the patient when the catheter is used for hemodialysis or the injection of fluids or medications into the patient.
  • the distal inner surface 34 is shaped to minimize the likelihood that the opening 28 will be drawn against the wall of the blood vessel if fluids are drawn into the catheter through the opening 28 because of the shape of the distal inner surface 34.
  • the flow passage area 17 also includes a raised area ' 36 which functions to reduce the likelihood that fluids will be intermixed between the openings 28 and - 8 -
  • the final area of the tip member 14 is the nose area 19.
  • This area is an enlarged area located on the distal end portion of the tip member 14.
  • the nose area 19 is a generally bullet shaped area which functions to disperse fluids from the return lumen and also includes the guide wire lumen 38 extending therethrough.
  • the outer diameter of the tip member 14 decreases from the proximal area 15 of the nose area 19.
  • the diameter of the tip member is approximately equal to or slightly less than the diameter of the body portion 12 of the catheter assembly 10.
  • the interconnection of the tip member 14 and the body portion rely on the engagement of the walls of the body portion and the tip member which as mentioned above, may be adhesively or otherwise bonded together in a conventional manner.
  • the wall of the body portion 12 which is opposite to the opening 30 extends into the tip member 14 and preferably forms a surface for binding the components together as well as a surface which adds longitudinal strength to the tip member 14.
  • the tip member 14 is formed of a relatively soft material so as to minimize the potential for injury to the wall of the blood vessel while the body portion is preferably stiffer than the tip member 14 to provide greater columnar strength to the catheter assembly to allow for the insertion of the catheter into the body of the patient.
  • the openings 28 and 30 of the lumens of the catheter preferably extend the entire width of the tip member 14 and are separated longitudinally along the tip member 14 by the raised area 36. Additionally, the relative area of the openings 28 and 30 at the proximal inner surface 32 and distal inner surface 34 is preferably greater than the area of the lumens 24 and - 9 -
  • the proximal and distal inner surfaces, 32 and 34 preferably curve radially away from the axis of the tip member 14.
  • the shape of the proximal and distal inner surfaces 32 and 34 generally determines the shape of the openings 30 and 28 respectively.
  • These openings are preferably formed to extend more than 180 degrees around the circumference of the tip member 14. Therefore, fluids delivered outwardly through the lumens 24 and 26 pass around and over a large portion of surface area of the raised area 36 and nose area 19. Therefore, the tendency for the tip member to whip in the blood vessel during use is reduced.
  • the proximally positioned portion of the raised area 36 and nose area 19 adjacent to the openings 28 and 30 are each gradually built up in the distal direction to define a preferably uniform arc terminating along the outer surface of the tip member 14.
  • the radius of this arc is relatively short and is preferably as large as the intake and return lumens, 24 and 26 respectively.
  • the taper on the proximal side of each of the openings 28 and 30 is much sharper than the gradually tapered surfaces on the distal side of the openings formed by the proximal and distal inner surfaces, 32 and 34.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

L'invention concerne un cathéter allongé (10) comprenant une ou plusieurs lumières (24, 26), dont au moins une est en communication fluidique avec une ouverture située dans l'élément d'extrémité (14) du cathéter. L'élément d'extrémité présente une zone proximale (15) permettant sa fixation à la partie corps (12) du cathéter, une zone de passage de flux (17) ayant des surfaces distale et proximale (32, 34) qui s'évasent vers l'extérieur depuis l'intérieur du cathéter, une zone saillante (36) étant présente entre lesdites surfaces, de sorte que les ouvertures soient situées du même côté du cathéter, et soient espacées l'une de l'autre avec la zone saillante entre les deux.
PCT/US1999/001969 1998-01-30 1999-01-28 Catheter a lumieres multiples et extremite elargie WO1999038550A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU25680/99A AU2568099A (en) 1998-01-30 1999-01-28 Multiple lumen catheter with an enlarged tip

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7321398P 1998-01-30 1998-01-30
US60/073,213 1998-01-30

Publications (1)

Publication Number Publication Date
WO1999038550A1 true WO1999038550A1 (fr) 1999-08-05

Family

ID=22112418

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/001969 WO1999038550A1 (fr) 1998-01-30 1999-01-28 Catheter a lumieres multiples et extremite elargie

Country Status (2)

Country Link
AU (1) AU2568099A (fr)
WO (1) WO1999038550A1 (fr)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1231979A1 (fr) * 1999-11-24 2002-08-21 Radius International Limited Partnership Catheter pour vaisseau sanguin
EP1430924A1 (fr) * 2002-12-17 2004-06-23 N.G.C. Medical S.p.A. Cathéter d'aspiration à deux lumières pour protection distale lors d'interventions percutanées
WO2004096334A1 (fr) * 2003-03-28 2004-11-11 Sherwood Services Ag Catheter a extremite resistant a l'occlusion
WO2005082442A1 (fr) * 2004-02-12 2005-09-09 Boston Scientific Scimed, Inc. Embout de catheter de dialyse
EP1663342A2 (fr) * 2003-08-20 2006-06-07 Datascope Investment Corp. Catheter de dialyse avec renfort
WO2006062023A1 (fr) * 2004-12-07 2006-06-15 Nipro Corporation Catheter d’aspiration de thrombus dote d’une excellente capacite de passage
US7090654B2 (en) 2003-03-28 2006-08-15 Sherwood Services Ag Catheter with occlusion resistant tip
US7211074B2 (en) 2003-08-12 2007-05-01 Sherwood Services Ag Valved catheter
WO2007084706A3 (fr) * 2006-01-20 2007-12-27 Radius Int Lp Catheter presentant un bout moule par insertion
US7322953B2 (en) 2003-08-04 2008-01-29 Covidien Ag Catheter device
WO2009052506A1 (fr) 2007-10-19 2009-04-23 Navilyst Medical, Inc. Cathéter qui minimise la recirculation
US7776005B2 (en) 2003-03-28 2010-08-17 Covidien Ag Triple lumen catheter with occlusion resistant tip
US7988658B2 (en) * 2003-11-06 2011-08-02 Radius International Limited Partnership Catheter and method of manufacture
CN102421476A (zh) * 2009-03-12 2012-04-18 乔林有限及两合公司 双腔导管
US8317773B2 (en) 2006-11-07 2012-11-27 Angio Dynamics, Inc. Catheter with open faced sloped end portion
US8864724B2 (en) 2008-05-14 2014-10-21 Covidien Lp Catheter with valve
US8876752B2 (en) 2010-09-24 2014-11-04 Covidien Lp Dialysis catheter
US8986263B2 (en) 2011-03-08 2015-03-24 Covidien Lp Catheter with valve
US9005154B2 (en) 2008-09-26 2015-04-14 Covidien Lp Valved hemodialysis catheter
US9050435B2 (en) 2011-03-22 2015-06-09 Angiodynamics, Inc. High flow catheters
US9072867B2 (en) 2011-09-30 2015-07-07 Covidien Lp Catheter with external flow channel
US9155862B2 (en) 2012-09-28 2015-10-13 Covidien Lp Symmetrical tip acute catheter
US9168355B2 (en) 2006-09-29 2015-10-27 Covidien Lp Acute hemodialysis catheter assembly
US9468461B2 (en) 2009-06-26 2016-10-18 Covidien Lp Catheterization system
US9713694B2 (en) 2006-09-28 2017-07-25 Covidien Lp Low profile catheter assembly
US9913962B2 (en) 2004-11-04 2018-03-13 Covidien Ag Catheter insertion apparatus
US10058676B2 (en) 2009-09-30 2018-08-28 Covidien Lp Medical catheter having a design providing low recirculation and reversibility
US10143822B2 (en) 2012-07-05 2018-12-04 Covidien Lp Valved tip catheters

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4995865A (en) * 1989-06-09 1991-02-26 Worldwide Medical Plastics Inc. Multi-lumen catheters
US5380276A (en) * 1994-02-28 1995-01-10 The Kendall Company Dual lumen catheter and method of use
US5451206A (en) * 1993-08-02 1995-09-19 Quinton Instrument Company Triple lumen catheter
US5472417A (en) * 1987-12-22 1995-12-05 Vas-Cath Incorporated Triple lumen catheter
US5571093A (en) * 1994-09-21 1996-11-05 Cruz; Cosme Multiple-lumen catheter
US5685867A (en) * 1990-01-08 1997-11-11 The Curators Of The University Of Missouri Clot resistant multiple lumen catheter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5472417A (en) * 1987-12-22 1995-12-05 Vas-Cath Incorporated Triple lumen catheter
US4995865A (en) * 1989-06-09 1991-02-26 Worldwide Medical Plastics Inc. Multi-lumen catheters
US5685867A (en) * 1990-01-08 1997-11-11 The Curators Of The University Of Missouri Clot resistant multiple lumen catheter
US5451206A (en) * 1993-08-02 1995-09-19 Quinton Instrument Company Triple lumen catheter
US5380276A (en) * 1994-02-28 1995-01-10 The Kendall Company Dual lumen catheter and method of use
US5571093A (en) * 1994-09-21 1996-11-05 Cruz; Cosme Multiple-lumen catheter

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1231979A4 (fr) * 1999-11-24 2008-01-23 Radius Int Lp Catheter pour vaisseau sanguin
EP1231979A1 (fr) * 1999-11-24 2002-08-21 Radius International Limited Partnership Catheter pour vaisseau sanguin
EP1430924A1 (fr) * 2002-12-17 2004-06-23 N.G.C. Medical S.p.A. Cathéter d'aspiration à deux lumières pour protection distale lors d'interventions percutanées
US7776005B2 (en) 2003-03-28 2010-08-17 Covidien Ag Triple lumen catheter with occlusion resistant tip
US7090654B2 (en) 2003-03-28 2006-08-15 Sherwood Services Ag Catheter with occlusion resistant tip
WO2004096334A1 (fr) * 2003-03-28 2004-11-11 Sherwood Services Ag Catheter a extremite resistant a l'occlusion
KR100972463B1 (ko) * 2003-03-28 2010-07-27 코비디엔 아게 폐색 저항성 선단을 구비한 카테터
US7322953B2 (en) 2003-08-04 2008-01-29 Covidien Ag Catheter device
US7211074B2 (en) 2003-08-12 2007-05-01 Sherwood Services Ag Valved catheter
EP1663342A2 (fr) * 2003-08-20 2006-06-07 Datascope Investment Corp. Catheter de dialyse avec renfort
EP1663342A4 (fr) * 2003-08-20 2007-09-12 Datascope Investment Corp Catheter de dialyse avec renfort
US7988658B2 (en) * 2003-11-06 2011-08-02 Radius International Limited Partnership Catheter and method of manufacture
WO2005082442A1 (fr) * 2004-02-12 2005-09-09 Boston Scientific Scimed, Inc. Embout de catheter de dialyse
US11504499B2 (en) 2004-11-04 2022-11-22 Covidien Ag Catheter insertion apparatus
US10668248B2 (en) 2004-11-04 2020-06-02 Covidien Ag Catheter insertion apparatus
US9913962B2 (en) 2004-11-04 2018-03-13 Covidien Ag Catheter insertion apparatus
JPWO2006062023A1 (ja) * 2004-12-07 2008-06-05 ニプロ株式会社 通過性の優れた血栓吸引カテーテル
WO2006062023A1 (fr) * 2004-12-07 2006-06-15 Nipro Corporation Catheter d’aspiration de thrombus dote d’une excellente capacite de passage
WO2007084706A3 (fr) * 2006-01-20 2007-12-27 Radius Int Lp Catheter presentant un bout moule par insertion
US9713694B2 (en) 2006-09-28 2017-07-25 Covidien Lp Low profile catheter assembly
US9168355B2 (en) 2006-09-29 2015-10-27 Covidien Lp Acute hemodialysis catheter assembly
US8317773B2 (en) 2006-11-07 2012-11-27 Angio Dynamics, Inc. Catheter with open faced sloped end portion
WO2009052506A1 (fr) 2007-10-19 2009-04-23 Navilyst Medical, Inc. Cathéter qui minimise la recirculation
US9044576B2 (en) 2008-05-14 2015-06-02 Covidien Lp Catheter with valve
US8864724B2 (en) 2008-05-14 2014-10-21 Covidien Lp Catheter with valve
US9005154B2 (en) 2008-09-26 2015-04-14 Covidien Lp Valved hemodialysis catheter
US9642962B2 (en) 2008-09-26 2017-05-09 Covidien Lp Valved hemodialysis catheter
CN102421476A (zh) * 2009-03-12 2012-04-18 乔林有限及两合公司 双腔导管
US9468461B2 (en) 2009-06-26 2016-10-18 Covidien Lp Catheterization system
US10058676B2 (en) 2009-09-30 2018-08-28 Covidien Lp Medical catheter having a design providing low recirculation and reversibility
US8876752B2 (en) 2010-09-24 2014-11-04 Covidien Lp Dialysis catheter
US8986263B2 (en) 2011-03-08 2015-03-24 Covidien Lp Catheter with valve
US9050435B2 (en) 2011-03-22 2015-06-09 Angiodynamics, Inc. High flow catheters
US9072867B2 (en) 2011-09-30 2015-07-07 Covidien Lp Catheter with external flow channel
US10143822B2 (en) 2012-07-05 2018-12-04 Covidien Lp Valved tip catheters
US9526861B2 (en) 2012-09-28 2016-12-27 Covidien Lp Symmetrical tip acute catheter
US11413426B2 (en) 2012-09-28 2022-08-16 Covidien Lp Symmetrical tip acute catheter
US9155862B2 (en) 2012-09-28 2015-10-13 Covidien Lp Symmetrical tip acute catheter
US11554247B2 (en) 2012-09-28 2023-01-17 Covidien Lp Symmetrical tip acute catheter

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