WO2009068665A1 - Tube assembly for use in a wound drainage system - Google Patents

Tube assembly for use in a wound drainage system Download PDF

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Publication number
WO2009068665A1
WO2009068665A1 PCT/EP2008/066465 EP2008066465W WO2009068665A1 WO 2009068665 A1 WO2009068665 A1 WO 2009068665A1 EP 2008066465 W EP2008066465 W EP 2008066465W WO 2009068665 A1 WO2009068665 A1 WO 2009068665A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
conduit
inner tube
wound
tube assembly
Prior art date
Application number
PCT/EP2008/066465
Other languages
French (fr)
Inventor
Klaus Budig
Brian Nielsen
Jesper Mads Bartroff Frederiksen
Jens Høg TRUELSEN
Original Assignee
Coloplast A/S
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
Priority to US476507P priority Critical
Priority to US61/004,765 priority
Application filed by Coloplast A/S filed Critical Coloplast A/S
Publication of WO2009068665A1 publication Critical patent/WO2009068665A1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0023Suction drainage systems
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/008Drainage tubes; Aspiration tips
    • A61M1/0088Drainage tubes; Aspiration tips with a seal, e.g. to stick around a wound for isolating the treatment area

Abstract

System for draining fluid from a wound, which system comprises an enclosure for enclosing the wound, a drainage conduit (104) for connecting a wound site within the enclosure to a suction source, a pressure communication conduit (102) providing a communication between the wound site and a pressure sensing element. The drainage conduit (104) and the pressure communication conduit (102) extend coaxially, so that one of the conduits is in the form of an annular passage surrounding the other conduit.

Description

TUBE ASSEMBLY FOR USE IN A WOUND DRAINAGE SYSTEM

Technical field

The present invention generally relates to tubes, in particular tubes for use in negative pressure systems, i.e. suction systems, for removal of fluids from a wound and thus for enhancing wound healing. Such systems may comprise a wound enclosure which is attachable to a wound circumference of a living being to form an enclosure, and a suction source in fluid communication with the enclosure to provide a pressure difference between a negative pressure in the enclosure and an air pressure of an ambient space. Pressure detection within the wound enclosure is desirable in order to control and maintain an appropriate suction level within the wound enclosure.

Background of the invention

It has been found that fluid drainage of wounds promotes tissue growth and thereby facilitates a reduced healing time. The treatment has been exercised for many years, and various therapeutic apparatus for providing suction to a wound have been developed.

A wound cover may be fixed in a sealing manner to the skin of a living being so that an enclosure is formed around the wound. The cover is connected to a pump, and suction is applied. The suction forces exudate from the enclosure to a receptacle.

WO 01/34223 discloses a suction tube in the form of a multi-lumen tube having a central lumen for applying suction to a wound site and one or more peripheral lumens for sensing pressure at the wound site. The design of WO 01/34223 results in a rather large overall wall thickness and therefore a relatively hard and inflexible tubing system, which causes patient discomfort and is inconvenient for transportation purposes. Summary of the invention

It is an object of preferred embodiments of the present invention to provide a wound drainage system with an improved tubing system for draining fluid and detecting pressure at the wound site.

In a first aspect, the invention provides a system for draining fluid from a wound, comprising :

- an enclosure for enclosing the wound;

- a drainage conduit for connecting a wound site within the enclosure to a suction source;

- a pressure communication conduit providing a communication between the wound site and a pressure sensing element; wherein the drainage conduit and the pressure communication conduit extend coaxially, so that one of the conduits is in the form of an annular passage surrounding the other conduit. Preferably, one of the conduits is formed by an inner tube, and the other conduit is formed by an outer tube, which surrounds the inner tube.

In a second aspect, the invention also provides a tube assembly for use in the above system, the tube assembly comprising an inner tube and an outer tube, the inner and outer tube extending coaxially with the outer tube surrounding the inner tube. Though the tube according to the second aspect of the invention is primarily intended for the drainage system according to the first aspect of the invention, other applications are possible. In general, the tube assembly may be used is any setup, in which fluid flow and communication between two sites is required. One particular use is so-called night bags, in which urine may flow in one of the inner and outer tube, and pressure equalisation is made through the other tube.

Thanks to the provision of co-axial conduits, with one surrounding the other, the conduits may be accommodated in a tube assembly having a relatively small wall thickness. This results in a more flexible system and reduces the risk of kinking as compared to prior art systems having a central tube and peripheral tubes. Moreover, handling is rendered easier as compared to handling of tube systems including separate tubes extending in parallel. It is further achieved that one of the conduits may extend beyond the other one, so that, for example at one of the conduits, one may terminate at one face of an exudate collecting canister, whereas another conduit may extend further to a pressure sensing element, e.g. through the canister to a pressure sensing element arranged at another face of the canister. A further advantage of the present invention is that it allows for easy and inexpensive interconnection of the conduits to other conduits or tubes, or to connecting elements. This is described in further detail below.

In one embodiment, the stiffness of the inner tube is different from the stiffness of the outer tube. Particularly, the inner tube may be stiffer than the outer tube. This allows the inner tube to be made from a relatively thin-walled material and reduces the risk of kinking of the inner tube. The other tube may be made from a relatively soft material to increase patient comfort.

The risk of kinking may be further reduced by providing a corrugated wall along at least a portion of a length of one or both tubes. The corrugated tube wall may extend along the entire length of the tube wall or only along a part thereof. For example, corrugated sections may be provided, with non-corrugated sections extending between the corrugated sections. It has been found that corrugations are particularly beneficial in the wall of the inner tube.

Each of the tubes may be terminated by a conical wall portion at at least one end thereof. The conical wall sections provide the possibility of easily connecting the tube assembly to a connector, e.g. for connecting to another tube assembly or for connecting the tube assembly at the wound site. Sealing and/or locking may be accomplished by firmly pressing the tubes against the connector or by rotating respective male and female parts relative to each other. In order to hold the parts together, a bayonet clutch or an ordinary screw thread may be used. In a one embodiment, the drainage conduit surrounds the pressure communication conduit. This allows the drainage conduit to terminate before the pressure communication conduit terminates, allowing for convenient connection to, e.g., a suction unit including an exudate collecting canister and a pump unit.

Description of the drawings

Embodiments of the invention will now be described further with reference to the accompanying drawings.

Fig. 1 illustrates a tube assembly 100 comprising an inner tube 102 and an outer tube 104. In the upper sketch of Fig. 1, the tubes are concentric, whereas they are centrally offset in the lower sketch. The inner tube may move freely within the outer tube, except for its end points, which may be fixed at connectors or the like. As shown in Fig. 2, the tubes may form a conical male connector 106 at at least one end thereof.

Fig. 3 illustrates a system for draining fluid from a wound (not shown). A free end 103 of the tube assembly 100 is intended for connection to a wound site (not shown). The system includes a drive and collecting unit 110 comprising an exudate collecting canister 112 and a drive and control unit 114. The drive and control unit 114 comprises a pressure sensing element (not shown) for measuring a pressure at the wound site through the inner tube 102. The outer tube 104 terminates at an inlet to the canister 112, whereas the inner tube

(pressure communication conduit) extends through the canister. Fig. 4 shows a corrugated inner tube 102 surrounded by a non-corrugated outer tube 104.

Claims

1. A system for draining fluid from a wound, comprising :
- an enclosure for enclosing the wound;
- a drainage conduit for connecting a wound site within the enclosure to a suction source;
- a pressure communication conduit providing a communication between the wound site and a pressure sensing element; wherein the drainage conduit and the pressure communication conduit extend coaxially, so that one of the conduits is in the form of an annular passage surrounding the other conduit.
2. A system according to claim 1, wherein one of said conduits is formed by an inner tube, and wherein the other conduit is formed by an outer tube, which surrounds the inner tube.
3. A system according to claim 2, wherein the stiffness of the inner tube is different from the stiffness of the outer tube.
4. A system according to claim 3, wherein the inner tube is stiffer than the outer tube.
5. A system according to any of claims 2-4, wherein at least one of the tubes has a corrugated wall along at least a portion of its length.
6. A system according to claim 5, wherein the inner tube has a corrugated wall along at least a portion of its length.
7. A system according to any of claims 2-6, wherein each of the tubes is terminated by a conical wall portion at at least one end thereof.
8. A system according to any of the preceding claims, wherein the drainage conduit surrounds the pressure communication conduit.
9. A tube assembly for use in a system according to any of the preceding claims, said tube assembly comprising an inner tube and an outer tube, the inner and outer tube extending coaxially with the outer tube surrounding the inner tube.
10. A tube assembly according to claim 9, wherein the stiffness of the inner tube is different from the stiffness of the outer tube.
11. A tube assembly according to claim 10, wherein the inner tube is stiffer than the outer tube.
12. A tube assembly according to any of claims 9-11, wherein at least one of the tubes has a corrugated wall along at least a portion of its length.
13. A tube assembly according to claim 12, wherein the inner tube has a corrugated wall along at least a portion of its length.
14. A tube assembly according to any of claims 9-13, wherein each of the tubes is terminated by a conical wall portion at at least one end thereof.
15. A tube assembly according to any of claims 9-14, wherein one of the inner and outer tubes extends beyond the other one at at least one end of the tube assembly.
PCT/EP2008/066465 2007-11-30 2008-11-28 Tube assembly for use in a wound drainage system WO2009068665A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US476507P true 2007-11-30 2007-11-30
US61/004,765 2007-11-30

Publications (1)

Publication Number Publication Date
WO2009068665A1 true WO2009068665A1 (en) 2009-06-04

Family

ID=40385408

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/066465 WO2009068665A1 (en) 2007-11-30 2008-11-28 Tube assembly for use in a wound drainage system

Country Status (1)

Country Link
WO (1) WO2009068665A1 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9033942B2 (en) 2008-03-07 2015-05-19 Smith & Nephew, Inc. Wound dressing port and associated wound dressing
US9050398B2 (en) 2010-12-22 2015-06-09 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9327065B2 (en) 2009-12-22 2016-05-03 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9474654B2 (en) 2008-08-08 2016-10-25 Smith & Nephew, Inc. Wound dressing of continuous fibers
WO2017019939A1 (en) * 2015-07-29 2017-02-02 Innovative Therapies, Inc. Wound therapy device pressure monitoring and control system
US9801985B2 (en) 2007-12-06 2017-10-31 Smith & Nephew Plc Apparatus for topical negative pressure therapy
USD804014S1 (en) 2010-12-22 2017-11-28 Smith & Nephew, Inc. Suction adapter
USD806242S1 (en) 2012-05-23 2017-12-26 Smith & Nephew Plc Flexible port used to connect a wound dressing to a source of negative pressure
US9889241B2 (en) 2009-06-01 2018-02-13 Smith & Nephew, Inc. System for providing continual drainage in negative pressure wound therapy
USRE46825E1 (en) 2009-01-20 2018-05-08 Smith & Nephew, Inc. Method and apparatus for bridging from a dressing in negative pressure wound therapy
US10010658B2 (en) 2013-05-10 2018-07-03 Smith & Nephew Plc Fluidic connector for irrigation and aspiration of wounds
US10016545B2 (en) 2008-07-21 2018-07-10 Smith & Nephew, Inc. Thin film wound dressing
US10076594B2 (en) 2015-05-18 2018-09-18 Smith & Nephew Plc Fluidic connector for negative pressure wound therapy
US10076449B2 (en) 2012-08-01 2018-09-18 Smith & Nephew Plc Wound dressing and method of treatment
US10406036B2 (en) 2009-06-18 2019-09-10 Smith & Nephew, Inc. Apparatus for vacuum bridging and/or exudate collection
USD866756S1 (en) 2017-12-22 2019-11-12 Smith & Nephew Plc Flexible port used to connect a wound dressing to a source of negative pressure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999038549A1 (en) * 1998-01-28 1999-08-05 Mentor Corporation Tubing system to maintain fluid pressure during surgery
WO2001034223A1 (en) * 1999-11-09 2001-05-17 Kci Medical Limited Wound suction device with multi-lumen connector
WO2007030599A2 (en) * 2005-09-07 2007-03-15 Tyco Healthcare Group Lp Self contained wound dressing apparatus
WO2007087811A1 (en) * 2006-02-02 2007-08-09 Coloplast A/S A suction system
WO2007092397A2 (en) * 2006-02-06 2007-08-16 Kci Licensing, Inc. Systems and methods for improved connection to wound dressings in conjunction with reduced pressure wound treatment systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999038549A1 (en) * 1998-01-28 1999-08-05 Mentor Corporation Tubing system to maintain fluid pressure during surgery
WO2001034223A1 (en) * 1999-11-09 2001-05-17 Kci Medical Limited Wound suction device with multi-lumen connector
WO2007030599A2 (en) * 2005-09-07 2007-03-15 Tyco Healthcare Group Lp Self contained wound dressing apparatus
WO2007087811A1 (en) * 2006-02-02 2007-08-09 Coloplast A/S A suction system
WO2007092397A2 (en) * 2006-02-06 2007-08-16 Kci Licensing, Inc. Systems and methods for improved connection to wound dressings in conjunction with reduced pressure wound treatment systems

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9801985B2 (en) 2007-12-06 2017-10-31 Smith & Nephew Plc Apparatus for topical negative pressure therapy
US9956329B2 (en) 2008-03-07 2018-05-01 Smith & Nephew, Inc. Wound dressing port and associated wound dressing
US9033942B2 (en) 2008-03-07 2015-05-19 Smith & Nephew, Inc. Wound dressing port and associated wound dressing
US10016545B2 (en) 2008-07-21 2018-07-10 Smith & Nephew, Inc. Thin film wound dressing
US9474654B2 (en) 2008-08-08 2016-10-25 Smith & Nephew, Inc. Wound dressing of continuous fibers
USRE46825E1 (en) 2009-01-20 2018-05-08 Smith & Nephew, Inc. Method and apparatus for bridging from a dressing in negative pressure wound therapy
US9889241B2 (en) 2009-06-01 2018-02-13 Smith & Nephew, Inc. System for providing continual drainage in negative pressure wound therapy
US10406036B2 (en) 2009-06-18 2019-09-10 Smith & Nephew, Inc. Apparatus for vacuum bridging and/or exudate collection
US9327065B2 (en) 2009-12-22 2016-05-03 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9999547B2 (en) 2009-12-22 2018-06-19 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9642750B2 (en) 2009-12-22 2017-05-09 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9974695B2 (en) 2009-12-22 2018-05-22 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US10406037B2 (en) 2009-12-22 2019-09-10 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
USD804014S1 (en) 2010-12-22 2017-11-28 Smith & Nephew, Inc. Suction adapter
US9050398B2 (en) 2010-12-22 2015-06-09 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9956389B2 (en) 2010-12-22 2018-05-01 Smith & Nephew, Inc. Apparatuses and methods for negative pressure wound therapy
US9907703B2 (en) 2012-05-23 2018-03-06 Smith & Nephew Plc Apparatuses and methods for negative pressure wound therapy
USD820990S1 (en) 2012-05-23 2018-06-19 Smith & Nephew Plc Medical dressing
USD806243S1 (en) 2012-05-23 2017-12-26 Smith & Nephew Plc Flexible port used to connect a wound dressing to a source of negative pressure
USD806256S1 (en) 2012-05-23 2017-12-26 Smith & Nephew Plc Medical dressing
USD806242S1 (en) 2012-05-23 2017-12-26 Smith & Nephew Plc Flexible port used to connect a wound dressing to a source of negative pressure
US10076449B2 (en) 2012-08-01 2018-09-18 Smith & Nephew Plc Wound dressing and method of treatment
US10010658B2 (en) 2013-05-10 2018-07-03 Smith & Nephew Plc Fluidic connector for irrigation and aspiration of wounds
US10076594B2 (en) 2015-05-18 2018-09-18 Smith & Nephew Plc Fluidic connector for negative pressure wound therapy
WO2017019939A1 (en) * 2015-07-29 2017-02-02 Innovative Therapies, Inc. Wound therapy device pressure monitoring and control system
USD866756S1 (en) 2017-12-22 2019-11-12 Smith & Nephew Plc Flexible port used to connect a wound dressing to a source of negative pressure

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