WO1999053981A9 - Catheter a joint annulaire et son procede - Google Patents

Catheter a joint annulaire et son procede

Info

Publication number
WO1999053981A9
WO1999053981A9 PCT/US1999/008507 US9908507W WO9953981A9 WO 1999053981 A9 WO1999053981 A9 WO 1999053981A9 US 9908507 W US9908507 W US 9908507W WO 9953981 A9 WO9953981 A9 WO 9953981A9
Authority
WO
WIPO (PCT)
Prior art keywords
catheter
base arrangement
locking sleeve
connector
compression seal
Prior art date
Application number
PCT/US1999/008507
Other languages
English (en)
Other versions
WO1999053981A1 (fr
Inventor
James C Marrs
Qingsheng Cai
William L Beling
Harry A Puryear
Original Assignee
Sims Deltec Inc
James C Marrs
Qingsheng Cai
William L Beling
Harry A Puryear
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 Sims Deltec Inc, James C Marrs, Qingsheng Cai, William L Beling, Harry A Puryear filed Critical Sims Deltec Inc
Priority to US09/673,709 priority Critical patent/US6562023B1/en
Priority to AU37505/99A priority patent/AU3750599A/en
Publication of WO1999053981A1 publication Critical patent/WO1999053981A1/fr
Publication of WO1999053981A9 publication Critical patent/WO1999053981A9/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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/02—Access sites
    • A61M39/0208—Subcutaneous access sites for injecting or removing fluids
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/02—Access sites
    • A61M39/0208—Subcutaneous access sites for injecting or removing fluids
    • A61M2039/0211—Subcutaneous access sites for injecting or removing fluids with multiple chambers in a single site
    • 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
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • A61M39/12—Tube connectors; Tube couplings for joining a flexible tube to a rigid attachment

Definitions

  • This invention relates to catheter connectors and methods for connection generally, and more specifically to catheter connectors and methods for portal assemblies.
  • an implanted portal assembly which is accessed percutaneously to infuse the fluid to the desired location.
  • a similar arrangement can be used to draw blood from an artery or vein for blood sampling purposes, or to draw other body fluids.
  • Such an implanted assembly includes a port which is implanted under the skin and attached to the chest wall or other convenient body location. The port includes a septum for accessing an interior of the port.
  • the septum is located directly under the skin and is penetrable by a needle. Drugs or other fluids can be introduced into the port (or fluids withdrawn from the port) by percutaneously inserting the needle through the septum of the port.
  • the port includes an outlet member which is connected via connection structure to one end of a flexible elastic catheter which leads to the infusion (or withdrawal) site in the patient's body.
  • Such an implantable port device of this type may remain in the patient's body for a long period of time, such as several months.
  • a significant concern is that the connection between the catheter and the port remain secure and fluid tight during the period of implantation.
  • the catheter and port may be subjected to various external forces acting to separate the catheter from the port. Should the connection fail, the fluids injected into the port would not be transported to the targeted infusion site and instead the fluid would be dispensed at the site of the port. This can be a particular concern in the case of certain drug therapies, such as chemotherapy, in which the drugs are highly concentrated and dangerous if misdirected in the patient's body. Withdrawal of fluids would also be adversely affected if the connection failed.
  • a further concern is the ease and reliability in which the port can be connected to the catheter.
  • the connection between the port and the catheter is made during the implantation surgery when the portal assembly is first installed.
  • a surgeon handling the implantation surgery will be wearing gloves, and the gloves or port may be covered with body fluids from the surgery.
  • the connector structure is easy to use in these circumstances and to do so reliably.
  • the connection is also a need for the connection to be made quickly to keep the length of the surgery as short as possible.
  • a further concern is the size of the catheter connector.
  • a connector that is too bulky can be a problem for the patient.
  • Intricate parts can be a problem for manufacture of the connector, and also use of the connector, especially if the parts are small in size.
  • U.S. Patent No. 5,562,618, issued October 8, 1996 is a further example of connection structure for connecting a catheter to a port.
  • the '618 patent shows a connector 26 for use in connecting a dual lumen catheter 24 to a port having two different needle access sites 48 and two outlet tubes 34, 36.
  • a sleeve 102 and a lock ring 120 connect catheter 24 to outlet tubes 34, 36.
  • Connector 26 of the '618 patent bunches up an end of catheter 24 during use as shown in FIG. 6.
  • FIG. 1 is a perspective view of a portal assembly according to the present invention including a catheter connector.
  • FIG. 2 is a perspective view of the port of FIG. 1.
  • FIG. 3 is a top view of the port.
  • FIG. 4 is a front view of the port.
  • FIG. 5 is a top view of the port, showing the catheter positioned on the outlet tubes, and the locking sleeve positioned over the catheter ready to connect the catheter to the port.
  • FIG. 6 is a cross-sectional top view of FIG. 5, taken along lines A- A of FIG. 4.
  • FIG. 7 is a top view of the port related to FIG. 5 showing the locking sleeve now in the locked position.
  • FIG. 8 is a cross-sectional top view of FIG. 7, taken along lines A-A of FIG. 4.
  • FIG. 8 A is an enlarged cross-sectional top view of a portion of the portal assembly of FIG. 8 showing the catheter seal.
  • FIG. 9 is an exploded cross-sectional front view of the port before assembly, taken along lines B-B of FIG. 3, without the outlet tubes or the outlet tube support.
  • FIG. 10 is a bottom perspective view of the base of the reservoir.
  • FIG. 11 is a cross-sectional top view of the base of the reservoir.
  • FIG. 12 is a top view of one of the caps of the reservoir.
  • FIG. 13 is a top view of one of the outlet tubes with a proximal end portion shown in cross-section.
  • FIG. 14 is a cross-sectional end view of the outlet tube of FIG. 13 taken along lines C-C.
  • FIG. 15 is a perspective view of the outlet tube support.
  • FIG. 16 is a cross-sectional side view of the outlet tube support taken along lines D-D of FIG. 15.
  • FIG. 17 is a rear end view of the outlet tube support.
  • FIG. 18 is a front end view of the outlet tube support.
  • FIG. 19 is a perspective view of the cowl of the outer housing of the port.
  • FIG. 20 is a perspective view of the base of the outer housing of the port.
  • FIG. 21 is a perspective view of the locking sleeve.
  • FIG. 22 is an end view of the locking sleeve.
  • FIG. 23 is an opposite end view of the locking sleeve relative to FIG. 22.
  • FIG. 24 is a cross-sectional view of the locking sleeve taken along lines E-E of FIG. 23.
  • FIG. 25 is a side view of the locking sleeve.
  • FIG. 26 is an alternative side view to FIG. 25 with the locking sleeve rotated relative to the view of FIG. 25.
  • FIG. 27 is a cross-sectional side view of the compression seal.
  • FIG. 28 is an end view of the dual lumen catheter.
  • FIG. 29 is a top view of a first alternative locking sleeve.
  • FIG. 30 is a top view of a second alternative locking sleeve.
  • FIG. 31 is a top view of a third alternative locking sleeve.
  • a catheter connector including a compression fitting for sealing a catheter to a tube of a base arrangement, such as a port.
  • the base arrangement includes a stop surface.
  • the connector includes a locking member including a stop surface. The two stop surfaces compress a compression seal to seal the catheter to the tube.
  • the locking member mounts to the base arrangement with a cam and bayonet system.
  • the cam is formed on a moveable lever arm which functions as a compensating member.
  • the locking member is preferably a sleeve which holds the compression seal in an internal chamber.
  • the compensating member is provided to allow for consistent sealing of the catheter.
  • Other compensating members which can be provided in combination with the lever arm or instead of the lever arm include recesses or holes in the locking sleeve to receive portions of the compression seal, and/or a flexible stop surface within the locking sleeve.
  • Another aspect of the present invention also relates to a compression fitting where the compression seal which seals the catheter to the tube or tubes has an undulating shape for forming a plurality of ring seals.
  • a further aspect of the present invention also relates to a compression fitting where the tip of the catheter is received in a generally cylindrical recess of the base arrangement.
  • the recess includes a stop surface for engaging the end of the catheter.
  • an inspection hole is provided for visually checking whether the catheter is fully inserted into the recess.
  • Preferred base arrangements in accordance with the invention include implantable ports including at least one pierceable septum.
  • Preferred base arrangements also include two outlet tubes which are sealed to a dual lumen catheter by the compression fitting.
  • the preferred outlet tubes and lumens of the dual port and catheter includes rounded D-shapes with curved corners.
  • the present invention also relates to methods of use of a catheter connector where the connector includes a compression fitting including a compression seal.
  • One aspect of the method of use in accordance with the present invention relates to providing a cam slot and bayonet to lock the compression fitting, where the method includes positioning the cam slot on a moveable lever arm, and moving the lever arm during locking of the compression fitting to compensate for overcompression of the seal.
  • Further methods include moving an end portion of the locking sleeve to compensate for overcompression of the seal.
  • Still further methods include flowing the seal into a recess or hole of the locking sleeve for overcompression of the seal.
  • Another aspect of the method of use in accordance with the present invention relates to forming a plurality of ring seals with the compression seal between the catheter and the outlet tube or tubes of the connector.
  • a further aspect of the method of use in accordance with the present invention relates to positioning the end of the catheter within the connector in a generally cylindrical recess, the end of the catheter positioned within the recess and over the outlet tube or tubes so as to engage a stop surface.
  • the present invention provides a connector for connecting a catheter to a base arrangement with at least one outlet tube.
  • the base arrangement preferably includes an access port for implantation under the skin and two side by side outlet tubes.
  • the connector includes a locking member and a compression seal which cooperates with the base arrangement to radially inwardly compress the catheter to the outlet tube or tubes.
  • the preferred compression seal produces a plurality of ring seals between the catheter and the outlet tube or tubes.
  • a cam and bayonet arrangement with an overcenter portion locks the locking member to the base arrangement and provides consistent sealing of the catheter, as well as a mechanical advantage for the operator, and secure locking.
  • the connector includes a compensating feature for allowing consistent locking of the locking member to the base arrangement.
  • the base arrangement also receives an end of the catheter for further sealing of the catheter to the base arrangement.
  • FIGS. 1 through 8 A a portal assembly 20 is shown.
  • Figures 9 through 28 show features of portal assembly 20 in greater detail.
  • Portal assembly 20 includes a portal or port 22, a catheter 24, and a connector 26 connecting catheter 24 to port 22 with a fluid-tight seal.
  • Portal assembly 20 is implantable under the skin for use in infusing drugs or other fluids to the patient entering at port 22 and exiting at a distal end 25 of catheter 24.
  • Portal assembly 20 is also utilized in some situations as a port for withdrawing blood or other fluids from the body via catheter 24. In either case, catheter 24 has distal end 25 at the desired location within the patient's body.
  • Connector 26 connects a proximate end 32 of catheter 24 to port 22. Connector 26 also permits disconnection of catheter 24 from port 22 at the desired time.
  • Catheter 24 is made from a bio-compatible and flexible, elastic polymeric material, such as silicone or polyurethane.
  • port 22 is a dual port.
  • Two different needle access sites 28 are provided with a dual port configuration.
  • the dual port configuration includes two outlet tubes 34, 36 as shown in FIG. 2.
  • catheter 24 is a dual lumen configuration with a first lumen 30 and a second lumen 31 as shown in FIGS. 1, 6 and 28.
  • Distal ends 68, 70 of outlet tubes 34, 36 extend generally parallel to axis 71 and in close proximity to one another.
  • Each lumen 30, 31 of catheter 24 is in fluid communication with one of outlet tubes 34, 36. Additional outlet tubes and an appropriately configured catheter 24 can be provided if more than two access sites are provided.
  • portal assembly 20 can instead be a single port configuration, with a single outlet tube, and catheter 24 can be a single lumen. It is to be appreciated that, for a multi-port configuration, outlet tubes 34, 36 can be positioned in a spaced apart configuration (not shown). In that case, a connector 26 would be provided for each outlet tube and catheter 24 would be a single lumen.
  • Outlet tubes 34, 36 are shown as being made from generally tubular shaped bio-compatible metallic materials, such as titanium. Other materials, such as plastics and other non-metallic materials, in other shapes are possible. Angled shapes (FIG. 13) are provided to link two access sites to a dual lumen catheter. As will be described below, ends 68, 70 of outlet tubes 34, 36 are provided with a rounded D-shaped outer surface 69, such as shown in FIG. 14. Such shapes generally match the shapes of lumens 30, 31 of catheter 24.
  • Port 22 includes a body 50 and a plurality of suture holes 52 for use in suturing port 22 to the patient. Port 22 includes two pierceable septums 66 defining the two access sites 28 which close off two internal chambers 65 within body 50.
  • Each chamber 65 is in fluid communication with one of outlet tubes 34, 36.
  • Body 50 of port 22 can be made from a variety of materials, including all metal, all plastic, combinations thereof, or other materials which are bio-compatible.
  • port 22 is a hybrid construction including a metallic reservoir 60, such as titanium, surrounded by an outer housing 100 made from plastic, such as polysulfone.
  • reservoir 60 generally includes a base 62, and two caps 64 each with a central opening 67.
  • Each cap 64 is interference fit to base 62.
  • Caps 64 hold pierceable septums 66 to define enclosed chambers 65.
  • each septum 66 is wafer shaped before caps 64 compress a periphery of each septum 66 which causes the central region to bulge outward as shown in FIG. 1.
  • An exterior surface 72 of each cap 64 engages an interior surface 74 of upper chamber 76 of base 62 to form the interference fit.
  • Each septum 66 is trapped between a lip 78 of cap 64 and a shoulder 79 of base 62 around the periphery of septum 66.
  • Outlet tubes 34, 36 are welded to base 62 adjacent to each chamber 65.
  • Each of chambers 65 of reservoir 60 are in fluid communication with outlet tubes 34, 36 respectively, such as shown in FIG. 8. Therefore, fluids injected into chambers 65 via a needle which pierces one of septums 66, is in fluid communication with the respective outlet tubes 34, 36 for delivery to a site in the patient's body at distal end 25 of catheter 24.
  • Outer housing 100 generally includes a base 102 (FIG. 20) and a cowl 104 (FIG. 19) attached to one another around reservoir 60, such as by ultrasonic welding.
  • Cowl 104 includes two openings 105 which expose septums 66 when housing 100 is around reservoir 60.
  • Outlet tubes 34, 36 extend from housing 100 between a slot 106 of base 102 and a slot 108 of cowl 104.
  • Bumps 202 on base 102 are provided for assembly tolerance compensation. During assembly, bumps 202 engage reservoir 60 and melt down to the appropriate size so as to prevent reservoir 60 from rattling within outer housing 100.
  • Optional ridges 208 on cowl 104 (shown only on one side) are provided for extraction of the component from the injection mold.
  • a metallic support 80 (FIGS. 15-18) which supports outlet tubes 34, 36.
  • a first end 81 of support 80 is received within a recess 63 of base 62 of reservoir 60.
  • Support 80 is also received in slots 106, 108 of housing 100.
  • End 81 includes two spaced apart tabs 83a, 83b.
  • a central section 85 defines an oval shaped passage (see FIGS. 6 and 17).
  • An inner circular shoulder 87 closely surrounds and supports outlet tubes 34, 36 (See FIGS. 8 A, 17 and 18).
  • a locking sleeve 120 including an inner compression seal 140 to seal catheter 24 to outlet tubes 34, 36, mounts to support 80 to hold catheter 24 in sealing engagement with port 22.
  • Support 80 and locking sleeve 120 form a compression fitting to seal catheter 24 to outlet tubes 34, 36.
  • Seal 140 is concentric about a longitudinal axis 141 and defines a generally tubular shape.
  • Seal 140 is made of resilient material, such as molded silicone. As will be described below, a preferred seal 140 includes an undulating shape.
  • seal 140 is axially compressed resulting in a radially inward acting force applied to catheter 24 to seal catheter 24 to outlet tubes 34, 36.
  • Support 80 extends from reservoir 60 and includes a generally circular distal end 82.
  • Distal end surface 84 is generally perpendicular to a longitudinal axis 86 of support 80.
  • Distal end 82 of support 80 further includes two bayonets 88, 90 on opposite sides of end 82.
  • Support 80 further includes an inner passage 92, defining a cylindrically shaped chamber 93 at end 82 and an internal stop surface 94 for receipt of an end 32a of catheter 24. Inspection holes 180 are provided to visually inspect whether catheter 24 is positioned in chamber 93.
  • Stop surface 94 is generally perpendicular to axis 86.
  • Locking sleeve 120 includes a body 121, such as made from metal (titanium), with a solid end ring 122. An inwardly projecting shoulder 124 is disposed at a second end 126 of locking sleeve 120. Inner passage 123 receives catheter 24 and seal 140, with one end 140a adjacent to shoulder 124. During use, an opposite end 140b of seal 140 is positioned adjacent to end surface 84 of support 80. Locking sleeve 120 is axially moved relative to support 80 which results in compression of seal 140. Shoulder 124 is generally perpendicular to axis 125.
  • Locking sleeve 120 includes two slots 128, 129 which cooperate with bayonets 88, 90 of support 80 to mount locking sleeve 120 to support 80.
  • Slots 128, 129 are generally identically shaped on opposite sides of locking sleeve 120. With reference to slot 128, the slot is configured as a cam surface 130 which provides camming action of locking sleeve 120 relative to support 80 for use in providing mechanical advantage to axially compress seal 140 during locking.
  • Cam surface 130 can be angled as desired to vary the torque required to lock locking sleeve 120 and seal catheter 24.
  • outwardly extending wings or lever arms 132 are provided extending from a central portion of lock ring 120.
  • Recess 134 of port 22 is configured to fairly closely receive wings 132 of locking sleeve 120 as shown in FIG. 7.
  • Locking sleeve 120 is shown as being turned in a clockwise direction to seal catheter 24 against outlet tubes 34, 36. A counterclockwise arrangement is also possible (not shown).
  • Slot 128 includes an overcenter surface or detent 160 which locates bayonet 88 to hold locking sleeve 120 in the locked position as best shown in FIGS. 1, 7, 8 and 8 A.
  • An axial force is exerted on locking sleeve 120 by seal 140 in a direction away from support 80.
  • bayonet 88 cannot work its way past detent 160 and along cam surface 130 to possibly inadvertently allow catheter 24 to become separated from port 22.
  • detent 160 will not allow an errant needle to unlock locking sleeve 120. Further, the surgeon will realize instantly that connector 26 is properly locked when bayonet 88 reaches detent 160 during connection of catheter 24 to port 22.
  • a similar detent is provided for the other bayonet 90.
  • Cam surface 130 is formed on a moveable lever arm 170 of locking sleeve 120 so as to provide flexibility in locking sleeve 120, to assure consistent sealing.
  • Lever arm 170 in the preferred embodiment is formed by continuing slot 128 at 128a so as to form cam surface 130 on a projecting arm.
  • the size and shape of connecting region 172 controls the amount of flexing allowed in arm 170.
  • Arm 170 flexes in the direction of arrow A to assure that bayonets 88, 90 lock into detents 160. This is useful as a compensating mechanism to lessen the emphasis on the components of locking sleeve 120 having precise tolerances.
  • lever arm 170 With lever arm 170, a fluid tight seal is achieved over a larger range of relative sizes of body 121 and seal 140 of locking sleeve 120. Without lever arm 170, undue force may be required to reach detents 160 due to overcompression of the seal.
  • Lever arm 170 is particularly useful in preferred connector 26 which locks through a relatively short amount of rotation (approximately 90°). Slot 128a is sized to accommodate the total range of tolerances in the components of the locking sleeve 120.
  • a further compensating mechanism useable in addition to, or in the alternative to, lever arm 170 is to supply flow relief areas in body 121 for excess portions of seal 140 to flow to in the compressed state while still assuring that bayonets 88, 90 reach detents 160.
  • FIG. 29 shows a first alternative locking sleeve 120a with internal recesses or grooves 122a in body 121a for receipt of seal 140 so as to compensate for overcompression of seal 140.
  • FIG. 30 shows a second alternative locking sleeve 120b with holes 124b through body 121b so as to compensate for overcompression of seal 140.
  • FIG. 31 shows a third alternative locking sleeve 120c with a flexible second end 126c. Second end 126c includes slots 128c formed in end 126c which provides flexibility in end 126c. This flexibility permits compensation for overcompression of seal 140.
  • body 121 can be provided with a spring member or an elastomer which biases cam surface 130 toward end 126 so as to allow compensation of overcompression of seal 140.
  • compression seal 140 in the preferred embodiment includes an undulating shape along an inner diameter portion 142, and also along an outer diameter portion 144.
  • the undulating shape includes plurality of alternating rings 148 and recesses 146. Once seal 140 is compressed axially, a plurality of ring seals are formed between catheter 24 and outlet tubes 34, 36 from the inward expansion of rings 148. While the undulating shape of compression seal 140 is preferred, other shapes are possible, including generally cylindrical.
  • the undulating shape for seal 140 is preferred since it exerts a force in a 360° manner in a plurality of locations on catheter 24.
  • the use of recesses 146 further assists in compensating for variations in relative sizes of the system components, while still assuring a sufficient seal is formed.
  • Rings 148 further assist to resist pullout by catheter 24 due to the concentration of the radial forces on catheter 24 at each ring 148.
  • the use of concentric rings 148 further provides more predictability over a cylindrical seal for the inward radial expansion of seal 140 so that a sufficient seal is formed. For example, seal 140 is less likely to produce unsymmetrical buckling than a cylindrical seal.
  • Rings 148 are generally circular in cross-section. It is to be appreciated that other shapes are possible with sharper or smoother curves or angles to change the nature of the ring seals on catheter 24. Also, recesses 146 can be deeper or shallower to control the compression of seal 140. Non-uniform shapes along axis 141 are possible.
  • Cylindrical chamber 93 within support 80 generally constrains end 32a of catheter 24 during sealing.
  • the receipt of end 32a in chamber 93 helps to seal catheter 24.
  • catheter end 32a may flow toward stop surface 94, leading to further compression, and sealing, of catheter 24 at end 32a against stop surface 94.
  • septum 32b of catheter 32 is compressed, and further sealed, by the slight movement of outlet tubes 32, 34 toward one another from the resulting effect of radial compression by seal 140 on catheter 24.
  • Connector 26 generally includes the two outlet tubes 34, 36, the distal end of 82 of support 80, and locking sleeve 120. Together, outlet tubes 34, 36, and distal end 82 of support 80 form a base arrangement portion of connector 26. Connector 26 is useable not only in portal assembly 20 but in other structures where it is desired to securably connect a device to a catheter.
  • a preferred use of connector 26 with catheter 24 and port 22 positions by hand the end 32 of catheter 24 over the ends 68, 70 of outlet tubes 34, 36, and end 32a within chamber 93 of end 82 of support 80 and engaged with stop surface 94. Verification that catheter 24 is properly positioned within support 80 is through inspection hole 180 (see FIG. 5). As locking sleeve 120 is rotated to mount to support 80 through bayonets 88, 90, compression seal 140 is compressed axially, which results in a radial compression on catheter 24 against outlet tubes 34, 36 to form a plurality of ring seals. Detents 160 hold bayonets 88, 90 and locking sleeve 120 in the locked state until it is desired to disconnect catheter 24 from port 22. Arm 170 pivots as needed to allow bayonets 88, 90 to reach detents 160 for locking.
  • connector 26 in the case of the dual outlet tube configuration, achieves its seal by seal 140 engaging catheter 24 to seal catheter 24 against outlet tubes 34, 36, and also end 32a pushed into stop surface 94 as seal 140 compresses catheter 24. Also the squeezing together of outlet tubes 34, 36 is believed to cause sealing of septum 32b of catheter 24 against tubes 34, 36.
  • both outlet tubes 34, 36 and lumens 30, 31 of catheter 24 include D-shapes.
  • D-shapes on tubes 34, 36 include rounded corners 180.
  • the D-shaped lumens 30, 31 include rounded corners 182.
  • the rounded corners of the D-shapes facilitate a fluid tight seal from the compression-style fitting around a dual lumen catheter.
  • the back-to-back D- shapes allow relatively high fluid flow in a catheter having a circular outer cross-section. It is preferred that the D-shapes be related as follows:
  • Interference Radius of outlet tube corner - 0.9 x Interference Radius of lumen of catheter corner 1.05 x Interference, where Interference is 0.
  • the Interference is the overall interference of the catheter internal lumen with the outlet tube outside surface.
  • the catheter lumen inside surface needs to contact the outside surface of the outlet tube throughout the full perimeter. Gaps may form with sharper corners when a compression-type fitting is used. When rounded corners are provided as shown in the drawings and described above, gaps are sufficiently reduced or eliminated.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne un raccord de cathéter comprenant un tube (34, 36) de sortie, et un joint (140) à compression définissant une forme ondulée permettant de produire des joints annulaires au cours de l'utilisation. Une fente à came formée sur un bras de levier permet de verrouiller un manchon (120) de verrouillage du connecteur. Le bras de levier fait office de mécanisme de compensation de la surcompression du joint. La pointe (32a) du cathéter est reçue dans un évidement (92) du connecteur. Le raccord peut être utilisé sur une chambre implantée (20), présentant une double chambre à tubes (34, 36) de sortie parallèles, et un cathéter (24) à double lumière.
PCT/US1999/008507 1998-04-23 1999-04-23 Catheter a joint annulaire et son procede WO1999053981A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US09/673,709 US6562023B1 (en) 1999-04-23 1999-04-23 Catheter connector including seal ring and method
AU37505/99A AU3750599A (en) 1998-04-23 1999-04-23 Catheter connector including seal ring and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6567698A 1998-04-23 1998-04-23
US09/065,676 1998-04-23

Publications (2)

Publication Number Publication Date
WO1999053981A1 WO1999053981A1 (fr) 1999-10-28
WO1999053981A9 true WO1999053981A9 (fr) 1999-12-16

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PCT/US1999/008507 WO1999053981A1 (fr) 1998-04-23 1999-04-23 Catheter a joint annulaire et son procede

Country Status (2)

Country Link
AU (1) AU3750599A (fr)
WO (1) WO1999053981A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10149051B4 (de) 2001-10-05 2005-09-08 Disetronic Licensing Ag Vorrichtung zur Katheterkonnektion aus Träger, Hülse und Verbindungsstruktur
EP1907045B1 (fr) 2005-05-20 2014-01-08 Medtronic, Inc. Connecteur de verrouillage de catheter et procede
JP7058824B2 (ja) * 2018-01-19 2022-04-25 ニプロ株式会社 医療用コネクタ

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5185003A (en) * 1989-04-11 1993-02-09 B. Braun Melsungen Ag Port for injecting medicaments
US5387192A (en) * 1994-01-24 1995-02-07 Sims Deltec, Inc. Hybrid portal and method

Also Published As

Publication number Publication date
WO1999053981A1 (fr) 1999-10-28
AU3750599A (en) 1999-11-08

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