DE102015110432A1 - Instillation adapter for a vacuum wound treatment system - Google Patents

Abstract

The invention relates to a vacuum wound treatment system for the negative pressure therapy of wounds on the human or animal body. The under-pressure wound treatment system includes a negative pressure therapy device having a vacuum source, a vent valve, and an electronic control unit. The vacuum wound treatment system further comprises a multi-lumen conduit having a suction lumen for aspirating fluids from the wound and having a flushing lumen. During the negative pressure therapy, the suction lumen can be kept free by supplying ambient air to the wound end of the suction lumen via the flushing lumen. There is a multi-lumen quick release connector for reversibly connecting and disconnecting the sections between a device-side section and a wound-side section of the conduit means separately therefrom. A multi-lumen instillation adapter, which has suitable fits to connect to the male parts provided on the quick disconnect connector, can be reversibly inserted between the device-side and the suture-side section of the conduit means. In the instillation adapter either the suction lumen or alternatively the flushing lumen is formed unbranched, while the other lumen has a branching. If necessary, an instillation liquid can be supplied to the wound from the outside via the branched lumen.

Description

The invention relates to a vacuum wound treatment system for the negative pressure therapy of wounds on the human or animal body. The under-pressure wound treatment system includes a negative pressure therapy device, a multi-lumen conduit having a suction lumen and a flushing lumen, and a multi-lumen quick disconnect connector. During the negative pressure therapy, the suction lumen can be kept free by supplying ambient air to the wound end of the suction lumen via the flushing lumen.

The negative pressure therapy of wounds has become increasingly important, especially in the treatment of chronic, poorly healing wounds. In this case, negative pressure therapy (hereinafter also referred to as "negative pressure treatment") means that a wound to be treated by a dressing pressure-tight against the environment is completed ("vacuum bandage"), wherein within the closed wound space a relation to the atmospheric pressure reduced pressure ("negative pressure") applied and while the therapy is sustained permanently or intermittently.

In the context of the present invention, the term "negative pressure" is understood to mean a pressure range which is typically between 1 and 250 mmHg (mm of mercury) below the ambient atmospheric pressure. For the vacuum-tight closure of the wound, a vacuum bandage is provided which may comprise, for example, an air-impermeable cover sheet typically adhered to an intact skin area of the patient surrounding the wound.

To provide the negative pressure, an electric pump is often used. The pump is normally housed in a housing together with an electronic control unit and other components required for operation (for example, an accumulator for supplying power to the pump and control unit in the case of a mobile, that is, a user-carried unit). Such a device may also be referred to as a "negative pressure therapy device". In many cases, the therapy device comprises a secretion container, which is typically intended for single use, for collecting the extracted wound fluids.

The negative pressure communication between the negative pressure therapy device and the vacuum dressing is made possible in generic therapy devices by a conduit means, wherein the conduit means is typically connected via a vacuum connection means sealingly connected to the vacuum dressing. Such vacuum connection means (also referred to as "port") are commercially available, for example, the product "VivanoTec ^® Port" of the applicant. Exemplary is also on the WO2011076340 the applicant, which describes such a vacuum connection means in more detail. For monitoring and controlling the negative pressure applied in the wound space, a negative-pressure therapy device usually comprises at least one pressure sensor. Frequently, the pressure is measured via the conduit means provided for sucking off the wound fluids from the wound space. In addition, from the prior art negative pressure therapy devices are known in which a pressure sensor accommodated in the negative pressure therapy device can communicate with the wound space via a separate line, see for example WO1997018007 ,

In single-lumen (not generic) vacuum therapy systems, only a single fluid path for aspirating fluids is present between the vacuum source and the wound space ("suction channel"). Fluids are moved from the wound space to the vacuum source via a suction lumen. The fluids comprise liquids (for example wound secretions or rinsing fluids supplied from outside into the wound space) and gases (for example gases separated from the wound or ambient air which has entered the wound space through leaks in the vacuum dressing). With the vacuum source directed towards the suction flow and solids or viscous components, such as pus, are entrained from the wound room. Such components can lead to a blockage of the suction lumen during the therapy operation.

A known from the prior art way to eliminate stuck in the suction lumps during therapy operation, is to flush the suction lumen with ambient air freely. For this purpose, a separate from the suction channel existing additional fluid path ("flushing channel") may be provided, which comprises a flushing lumen. The additional flushing channel allows a supply of ambient air in the wound near opening of the suction lumen. Advantageously, suction lumens and flushing lumens are accommodated in a single multi-lumen conduit. In such a negative pressure therapy system, therefore, there are two separate fluid paths: A first fluid path, the suction channel, serves to apply negative pressure and to aspirate fluids out of the wound space. A second fluid path, the flushing channel, serves to supply ambient air into the suction channel. Ambient air can pass into the second fluid path via a ventilation valve, which is preferably accommodated in the vacuum therapy device. About the Spüllumen is the Ambient air then passed to a sore opening of the suction lumen, so that the suction lumen of any existing blockages can be flushed. In the suction channel and / or in the flushing channel, one or more pressure sensors may be present to determine the negative pressure in the wound space. A generic, two-lumen vacuum therapy system with suction line and purge line is in the WO2011018133 described by the applicant. In this system, the vacuum therapy device accommodates an electrically controlled vent valve. The only pressure sensor communicates with the suction channel, ie with the first fluid path. The negative pressure therapy device can be coupled to a one-time use secretion container whose output communicates with the vacuum pump and the pressure sensor. That in the WO2011018133 described device is commercially available under the name VivanoTec ^® manufacturer Paul Hartmann AG (Germany).

A measure supplementing the negative pressure therapy, which can be used in particular in the initial phase of the treatment of difficult-healing wounds, offers the "instillation therapy" (hereinafter also referred to as "instillation treatment"). Instillation therapy refers to a treatment of wounds in which fluid media, in particular liquid flushing media or drug solutions are introduced into the wound. Examples of such liquid media are solutions, emulsions or suspensions of antibiotics, analgesics or local anesthetics. The introduced media should develop a substantially local healing effect. As a result, for example, an inflammation in the area of the wound which impairs wound healing can be treated or prevented as part of a prophylactic measure. The combined use of vacuum and instillation treatment combines the advantages of both treatments. In the simplest case, an instillation or rinsing of the wound may precede the actual underpressure treatment, for example before the vacuum dressing is applied. The prior art further discloses therapy systems which allow instillation treatment of a wound while a vacuum dressing is applied to the wound site to be treated. The instillation treatment and the vacuum treatment can then be sequential or alternating, without the need for a dressing change between each treatment cycles.

The introduced during the instillation cycle in the sealed vacuum dressing solution is then removed by re-application of negative pressure from the wound space. The therapy devices used for this purpose are normally stationary devices for inpatient use in the hospital or in the doctor's office. Modular devices that allow both a negative pressure and instillation treatment, with separate device components being required for each of the two therapeutic options, are disclosed, for example, in the hitherto unpublished application PCT / EP2014 / 076921 described. Devices are also known in which both therapy options can be performed by means of a single device component. Such a device is for example in the WO2013116158 described. The WO2013116158 shows a negative pressure therapy device with a vacuum source, control unit and a housing which can accommodate an instillation container. The object of the present invention is to provide a simple and inexpensive system which enables the combined treatment of wounds on the human or animal body by means of vacuum and instillation treatment. In addition, it would be desirable if the instillation treatment would also be possible with the use of a mobile, ie a compact negative pressure therapy device that can be carried on the patient's body, since the instillation treatment and the underpressure treatment could then be carried out with one and the same device. It would also be desirable to easily extend a conventional negative pressure therapy device with an instillation function.

• i) ein Unterdrucktherapiegerät mit einer Unterdruckquelle, welche in Fluid-Kommunikation mit einem Sauglumen gebracht werden kann, einem Belüftungsventil, welches in Fluid-Kommunikation mit einem Spüllumen und mit der Umgebungsluft gebracht werden kann, und mit einer elektronischen Steuerungseinheit,
• ii) ein mehrlumiges Leitungsmittel mit einem Sauglumen und mit einem Spüllumen, wobei das Sauglumen während der Unterdrucktherapie einen Anteil eines ersten Fluidpfades von der Unterdruckquelle zu einer Wunde bilden kann, so dass Unterdruck an die Wunde angelegt werden kann und Fluide aus der Wunde abgesaugt werden können, und wobei das Spüllumen während der Unterdrucktherapie einen Anteil eines zweiten Fluidpfades von dem Belüftungsventil zu einer wundnahen Öffnung des Sauglumens bilden kann, so dass dem Sauglumen Umgebungsluft zum Freihalten des Sauglumens zugeführt werden kann, und wobei das Leitungsmittel weiterhin einen geräteseitigen Abschnitt und einen separat davon vorliegenden wundseitigen Abschnitt umfasst, und
• iii) einen mehrlumiger Schnelltrennverbinder zum reversiblen Herstellen einer Fluidkommunikation zwischen dem Saug- und dem Spüllumen des geräteseitigen Abschnittes des Leitungsmittels und den jeweiligen Lumen des wundseitigen Abschnittes des Leitungsmittels, wobei der Schnelltrennverbinder ein an dem geräteseitigen Abschnitt des Leitungsmittels vorhandenes erstes Steckerteil und ein an dem wundseitigen Abschnitt des Leitungsmittels vorhandenes zweites Steckerteil umfasst. Die erfindungsgemäße Vorrichtung ist dadurch gekennzeichnet, dass das Unterdruckwundbehandlungssystem einen mehrlumigen Instillationsadapter mit einem Sauglumen und einem Spüllumen umfasst, welcher zwischen dem geräteseitigen Abschnitt des Leitungsmittels und dem wundseitigen Abschnitt des Leitungsmittels reversibel eingebracht werden kann, indem er eine erste Passung zu dem an dem geräteseitigen Abschnitt des Leitungsmittels vorhandenen ersten Steckerteil und eine zweite Passung zu dem an dem wundseitigen Abschnitt des Leitungsmittels vorhandenen zweiten Steckerteil aufweist. Weiterhin ist die Erfindung dadurch gekennzeichnet, dass bei dem Instillationsadapter entweder das Sauglumen unverzweigt von der ersten Passung zu der zweiten Passung durchgeführt wird, während das Spüllumen eine zwischen der ersten Passung und der zweiten Passung vorhandene Verzweigung aufweist, so dass über die an dem Spüllumen vorhandene Verzweigung von außen eine Instillationsflüssigkeit in das Spüllumen eingebracht werden kann, oder dass alternativ das Spüllumen unverzweigt von der ersten Passung zu der zweiten Passung durchgeführt wird, während das Sauglumen eine zwischen der ersten Passung und der zweiten Passung vorhandene Verzweigung aufweist, so dass über die an dem Sauglumen vorhandene Verzweigung von außen eine Instillationsflüssigkeit in das Sauglumen eingebracht werden kann.

The objects were achieved by a vacuum wound treatment system, for the negative pressure therapy of wounds on the human or animal body, comprising

• i) a negative pressure therapy device having a vacuum source which can be brought into fluid communication with a suction lumen, a vent valve which can be brought into fluid communication with a purging lumen and with ambient air, and an electronic control unit,
• ii) a multi-lumen conduit having a suction lumen and a flushing lumen, wherein the suction lumen can form a portion of a first fluid path from the vacuum source to a wound during the vacuum therapy so that negative pressure can be applied to the wound and fluids can be extracted from the wound and wherein the purging lumen can form a portion of a second fluid path from the vent valve to a sore opening of the suction lumen during the vacuum therapy such that ambient air can be supplied to the suction lumen to clear the suction lumen, and wherein the conduit means further comprises a device-side portion and a separately thereof encompassing this sore-sided section, and
• iii) a multi-lumen quick disconnect connector for reversibly establishing fluid communication between the suction and purging lumens of the device-side portion of the conduit means and the respective lumens of the wound-side portion of the conduit means, the quick-disconnect connector comprising a first connector part provided on the device-side portion of the conduit means and one on the wound-side Section of the conduit means existing second connector part comprises. The device according to the invention is characterized in that the under-pressure wound treatment system comprises a multi-lumen instillation adapter having a suction lumen and a flushing lumen which can be reversibly inserted between the device-side portion of the conduit means and the wound-side portion of the conduit means by making a first fit to that on the device-side portion Having the conduit means existing first connector part and a second fit to the present at the sore-side portion of the conduit means second connector part. Furthermore, the invention is characterized in that in the instillation adapter, either the suction lumen is performed unbranched from the first fit to the second fit, while the flushing lumen has a branch existing between the first fit and the second fit, such that over the existing on the flushing lumen Alternatively, the flushing lumen is performed unbranched from the first fit to the second fit, while the suction lumen has a branch between the first fit and the second fit, so that over the on The branching present from the outside of the suction lumen can be introduced into the suction lumen from the outside by an instillation liquid.

The vacuum wound treatment system according to the invention thus comprises the components characterized in detail in claim 1 and in the following description negative pressure therapy device, multi-lumen conduit means, quick disconnect connector and instillation adapter.

The negative pressure therapy device includes at least a vacuum source, a vent valve, and an electronic control unit. There may be other components, for example a power supply component (in particular a rechargeable battery or a power supply), a display, operating elements for the user, an electronic interface and / or pressure sensors. Preferably, the negative pressure therapy device comprises at least one pressure sensor, which is used to monitor and control the negative pressure in the wound space. Particularly preferably, the negative pressure therapy device comprises a first pressure sensor, which can communicate with the suction lumen or with the suction channel and / or a second pressure sensor, which can communicate with the flushing lumen or with the flushing channel, so that during the negative pressure therapy, the negative pressure in the area of the wound can be determined. Alternatively, the negative pressure existing in the wound space can also be derived or estimated in an indirect manner, for example based on the power consumption of the pump.

Advantageously, the vacuum source, the electronic control unit, the venting valve, the first and / or the second pressure sensor (if present) and optionally further components are housed in a single housing. Such a designed device is compact and easy to handle.

In the context of the present invention, it is particularly preferred that the negative pressure therapy device is a device that can be carried on the body of a user (mobile negative pressure therapy device). Such a device improves the mobility of the patient compared to a purely stationary device.

According to a further advantageous embodiment, the under-pressure wound treatment system comprises a secretion container for collecting the aspirated fluids. As a secretion container is usually intended for one-time use plastic container or a plastic bag. Preferably, the secretion container can be reversibly coupled to the negative pressure therapy device. Negative pressure therapy device and secretion container then form a compact unit in the connected state. For the present invention particularly suitable secretion canisters are in the WO2014177544 and in the WO2014177545 described. In practice, it has proved to be particularly advantageous if secretion containers of different sizes can be coupled to the negative pressure therapy device. Smaller secretion containers with a smaller capacity are used when the patient wears the unit of negative pressure therapy device and secretion container on the body (mobile operation). By contrast, larger secretion containers are preferably used in stationary operation. Even during an instillation treatment, where the patient is usually in a medical facility (hospital or doctor's office) or at home, a higher capacity secretion vessel should be used, as larger volumes of aspirated fluids must be collected in the reservoir during the subsequent vacuum treatment.

The vacuum wound treatment system according to the invention further comprises a multi-lumen conduit with a suction lumen and with a flushing lumen. The underpressure wound treatment system thus has at least two separate fluid paths: A first fluid path is used to aspirate fluids from the wound space (suction channel). A second fluid path serves to supply ambient air to a near-end of the first fluid path to purge the first fluid path (purge passage). The second fluid path may additionally be used to establish a vacuum connection between a pressure sensor and the wound space.

Both the first fluid path and the second fluid path are formed by a plurality of portions. The first fluid path comprises on the device side a negative pressure connection from the negative pressure source to the suction lumen present in the conduit means. Furthermore, the first fluid path comprises the suction lumen present in the conduit means. The secretion container may form another portion of the first fluid path when the container is disposed between the vacuum source and the wound. In this case, an outlet of the secretion container is connected via a vacuum connection to the vacuum source. At the inlet of the secretion container, the leading to the wound conduit is connected directly or indirectly. The second fluid path comprises a vacuum connection from the ventilation valve to the flushing lumen present in the conduit means on the device side. Furthermore, the second fluid path comprises the flushing lumen present in the conduit means. Also, the second fluid path can be passed through the secretion container, as long as there is no fluid communication with the interior of the secretion container.

According to a particularly preferred embodiment, no further fluid paths are present in addition to the aforementioned first fluid path and the second fluid path.

In the context of the present invention, the term "multi-lumen conduit means" is understood to mean a conduit means which comprises at least one suction lumen and at least one flushing lumen. The at least one suction lumen and the at least one purging lumen can here be present in separate conduit components. Preferably, the at least one suction lumen and the at least one flushing lumen are present in a single conduit component. The at least two lumens can in particular be arranged next to one another. The conduit means may be a standard drainage tube suitable for medical use, for example of silicone or polyvinylchloride. The drainage tube preferably has an overall flat shape.

The multi-lumen conduit means comprises at least one device-side section and at least one wound-side section located separately therefrom. Each of the at least two existing sections each includes a suction lumen and a separately provided flushing lumen. The device-side section of the conduit means may be permanently connected to a septic fluid container by the manufacturer. The wound-side section of the conduit means can be permanently connected by the manufacturer to a vacuum connection means. The device-side portion of the conduit means and the wound-side portion of the conduit means can be reversibly coupled together by a multi-lumen quick disconnect connector. For this purpose, the device-side portion of the conduit means on a first connector part. At the wound portion of the conduit means a second connector part is present. The quick disconnect connector is thus formed from a first connector part and a matching second connector part. Inside each plug part each have a suction lumen and a flushing lumen are available. During the negative pressure treatment of a patient, the first plug part is connected to the second plug part. In order to be able to supply the wound with an instillation liquid, the vacuum source is switched off and the first plug part is disconnected from the second plug part. The multi-lumen instillation adapter according to the invention is then inserted between the first plug part and the second plug part. In order to be able to connect the instillation adapter to the first and the second plug part in each case, the instillation adapter has a first fit to the first plug part present on the device-side section of the line means and a second fit to the second plug part present on the wound-side section of the line means. To improve the practical handling and to avoid incorrect insertion of the instillation adapter, the first and the second plug part should preferably be designed differently, for example by the male part present on the wound side of the conduit section being female and the male part on the device side being male, or vice versa. Accordingly, the first fit and the second fit are also different on the instillation adapter, that is, not interchangeable. This ensures that the instillation adapter can only be inserted in the correct orientation.

The first fit on the instillation adapter must be connectable to the first plug part present on the device-side section of the line means. The second fit on the instillation adapter must be connectable to the second connector part present on the wound portion of the conduit means. It is therefore also possible the first Form fit identical to the second plug part and form the second fit identical to the first plug part. The first and / or second fitting present on the instillation adapter can comprise a plug part or consist of a plug part.

The instillation adapter includes a suction lumen and a flushing lumen. According to the invention, in the instillation adapter either the suction lumen or alternatively the flushing lumen is performed unbranched from the first fit to the second fit. The other lumen, however, has a branching. Via this branch, an instillation liquid can be introduced into the wound space either from the outside into the suction lumen (if the branch is present in the suction lumen) or via the flushing lumen (if the branch is present in the flushing lumen). For this purpose, the lumen which branches off either at the suction lumen or alternatively at the rinsing lumen is continued in such a way that a direct or indirect liquid connection with a container containing an instillation solution can be produced. The container may be, for example, an infusion bag, a bottle or a syringe. An immediate fluid connection is understood here to mean that the container is coupled directly, ie without further intermediate components, to the lumen branched off from the instillation adapter. In this context, an indirect fluid connection is understood to mean that the container is connected to the branching lumen using additional components, for example a hose. The branching lumen can be continued, for example, in a flexible tube which is designed to connect an instillation component and which has a closure means at its open end. The branching lumen can also open into a fitting provided on the instillation adapter, which is designed to connect an instillation component and which has a means for closing the open lumen. The closure means is usually a stopper closing the lumen, which can be put on and removed again. The plug is preferably already attached by the manufacturer and can be removed by the user when using the instillation adapter for instillation. If the vacuum treatment is continued, the stopper is replaced. In order not to lose the plug, it should be attached to the instillation adapter with a tape or the like.

Preferably, the branching off in the instillation adapter of the suction or the flushing lumen lumen is continued in a flexible hose, which is provided at its open end with a Luer-lock adapter. A luer-lock adapter allows a simple and secure attachment of the container containing the instillation solution or a hose connected to the container.

According to an embodiment which is preferred in practice, the suction lumen has a branching. Accordingly, in this embodiment, the purge lumen in the instillation adapter is unbranched from the first fit to the second fit. The advantage of this embodiment is that the suction lumen normally has sufficient passageway capacity to effectively introduce a required amount of instillation solution, for example 100 ml to 300 ml, into the wound space. Furthermore, the flushing lumen is kept free of instillation solution. The venting valve and an optionally present in the second fluid path pressure sensor then do not come into contact with the liquid.

According to a further preferred embodiment, the flushing lumen has a branching. In this further embodiment, the suction lumen in the instillation adapter is then designed unbranched throughout. Such a construction of the instillation adapter requires that the purge line has a sufficient cross-section to introduce the desired amount of instill liquid. Instilling via the flushing line offers the advantage that wound secretions, which are still in the wound-side section of the suction lumen, are not flushed back into the wound space at the beginning of the instillation. Furthermore, it is possible to carry out the supply of instillation solution and the suction simultaneously or alternately, without removing or disconnecting the container with instillation solution coupled to the instillation adapter.

The branched lumen present in the instillation adapter can, according to a particularly advantageous embodiment, have a substantially Y-shape. The arm of the Y in the instillation adapter which is formed vertically in the letter Y is hereby arranged towards the wound. Such an arrangement allows the user to intuitively recognize to which arm of the instillation adapter the conduit leading to the wound needs to be connected. The arrangement having a Y-shape is particularly advantageous when the container is coupled directly to the instillation adapter, since the opening of the container will then face downwards in most cases.

The instillation solution can be actively or passively supplied to the wound space. In passive delivery, the instillation solution follows gravity as in infusion treatment. At a In active delivery, the instillation solution is pumped or injected into the wound space.

According to a particularly preferred embodiment of the vacuum wound treatment system, the instillation solution can be supplied exclusively via the branched lumen present in the instillation adapter. By this is meant that the vacuum wound treatment system is not designed to couple another source of instillation fluid.

Preferably, the under-pressure wound treatment system according to the invention further comprises a covering material for the airtight sealing of the wound space. The covering material can be a film material, for example a film made of polyurethane. The film is preferably self-adhesive so that it can be adhesively secured to the intact skin surrounding the wound.

According to a further preferred embodiment, the vacuum wound treatment system comprises a vacuum connection means. Vacuum connection means are also referred to as "port" or vacuum port. The port serves for the functional connection of an airtight sealed wound space with the suction section and irrigation lumen present in the wound-side section of the conduit in the conduit. In this context, a functional connection is understood to mean that both the suction lumen and the flushing lumen enter into fluid communication with the wound space. Accordingly, a fluid communication between suction lumen and flushing lumen is made. The functional connection of suction lumen and irrigation lumen with the wound space makes it possible to produce a negative pressure in the wound space and / or to suck out liquids from the wound space and / or to supply instillation fluids to the wound space and / or flush the rinsing lumen with ambient air. The port and the wound conduit section can be provided inextricably linked together by the manufacturer.

Preferably, the vacuum connection means is provided for attachment to the outside of the cover material facing away from the wound in use. The port should include attachment means which allow easy attachment of the vacuum port means to the wound dressing. For this purpose, the port can for example be equipped with an adhesive bottom. Fluid communication between a port mounted on the exterior of a vacuum dressing and the wound space is facilitated by an opening in the hermetic cover material. The opening may already be provided by the manufacturer in the covering material. It is also possible that the opening is only introduced by the user. For this purpose, the user cuts a hole in the film after applying the vacuum dressing, but before attaching the port, for example by means of a scalpel.

The first fluid path can be rinsed by supplying ambient air to a near-end of the first fluid path and freed of any lumps. Preferably, the sore opening of the suction lumen is located directly in the vacuum connection means, wherein the sore opening of the lavage lumen is likewise present directly in the vacuum connection means. Fluid communication between the suction lumen and the flushing lumen can occur within the vacuum connection means. It is also possible for both the suction lumen and the flushing lumen to communicate separately with the wound space, so that in this case fluid communication takes place between the suction lumen and the flushing lumen via the wound space. It is also conceivable that the sore opening of the suction and / or Spüllumens ends in the region of the wound dressing. This can be accomplished, for example, by extending the suction and / or the flushing lumen in the vacuum connection means by a further conductive agent component which extends into the wound dressing. The required for the flushing ambient air passes through a vent valve in the second fluid path. The ventilation valve is housed in the negative pressure therapy device. The penetrating ambient air is preferably filtered by means of a suitable sterile filter. The supply of ambient air can be permanent or only temporary. A permanent supply of ambient air can be accomplished by means of a vent valve having a fixed opening. Such a valve causes a continuous air inflow into the second fluid path, wherein the per unit time penetrating air volume depends only on the opening cross section of the valve and the pressure difference between the present in the interior of the second fluid path vacuum and the ambient pressure. Preferably, only a temporary, selective supply of ambient air via an electrically controlled valve, for example via a solenoid valve. The electrically controlled valve is then controlled by the electronic control unit of the negative pressure therapy device. Instead of a permanent air inflow is thus an interval flushing. When the electronic control unit detects blockages in the first fluid path, the air purge can be used to selectively remove blockages. It is also possible to use the rinse at predetermined intervals as a precaution. The electrically controlled valve also allows partial or complete ventilation of the Wound space, for example in the so-called cyclic negative pressure treatment or at an end of the negative pressure treatment. Under a cyclic negative pressure treatment, a negative pressure therapy is understood, in which the treatment is carried out using alternating phases of different negative pressure.

One or more pressure sensors may be present in the suction channel and / or in the flushing channel in order to determine and control the negative pressure in the wound space. The one or more pressure sensors communicate with the electronic control unit.

According to a preferred first embodiment in this context, there is only a single pressure sensor which can be brought into fluid communication with the first fluid path. In a negative pressure wound treatment system comprising a secretion container, the single pressure sensor according to this first embodiment may in particular be brought into fluid communication with the portion of the first fluid path which is disposed between the negative pressure source and the secretion container. A generic two-lumen vacuum therapy system with suction line and purge line, wherein a single pressure sensor communicates with the first fluid path, is in the WO2011018133 described by the applicant.

According to a likewise preferred second embodiment in this context, only a single pressure sensor is present, which can be brought into fluid communication with the second fluid path. According to a particularly preferred embodiment according to this second embodiment, the pressure sensor is in this case accommodated in the vicinity of the ventilation valve in the negative pressure therapy device.

According to a further third embodiment preferred in this context, both a first pressure sensor, which can communicate with the first fluid path, and a second pressure sensor, which can communicate with the second fluid path, are present. A negative pressure therapy system with a first and a second pressure sensor is in WO1997018007 described.

The vacuum wound treatment system may further comprise a wound dressing suitable for vacuum treatment for application to the wound tissue. In medical practice wound dressings are often used in an open-cell foam in the vacuum therapy. A particularly suitable for the negative pressure foam material is, for example, in the WO2012022485 described. The use of a gauze material is possible. The wound dressing may comprise multiple layers of the same material or multiple layers of different materials. In particular, a foam wound dressing can be combined with a liquid-permeable wound contact layer in order to prevent adhesion of the foam to the wound base.

According to the invention, an instillation adapter as described in the present application is furthermore proposed for use with a multi-lumen negative pressure wound treatment system, wherein the underpressure wound treatment system has a suction channel and a separate flushing channel.

For practical use, a supplementary kit for a generic negative pressure wound treatment system can be provided by the manufacturer. Such a supplemental kit includes an instillation adapter as described in the present application. Preferably, the supplement kit further comprises a hose clamp. Optionally, further components may be present, for example a syringe which is suitable for connection to the lumen branching off in the instillation adapter and / or an instillation connector for connecting an instillation container. All components included in the supplement kit should be provided sterile. The supplement kit should also be accompanied by a user guide.

• i) Bereitstellung eines Unterdruckwundbehandlungssystems, wie vorstehend beschrieben.
• ii) Anlegen eines Unterdruckverbandes an eine Wunde eines Patienten, wobei ein luftdicht abgeschlossener Wundraum hergestellt wird.
• iii) Durchführen der Unterdruckbehandlung an einem Patienten, wobei der Wundraum mit Unterdruck beaufschlagt wird.
• iv) Unterbrechen der Unterdruckbehandlung durch Abschalten der Unterdruckquelle.
• v) Vorzugsweise Abklemmen eines geräteseitigen Abschnittes eines mehrlumigen Leitungsmittels. Es sollten hierbei sowohl das Sauglumen als auch das Spüllumen abgeklemmt werden. Das Abklemmen wird bevorzugt mittels einer üblichen Schlauchklemme bewerkstelligt. Das Abklemmen sollte erfolgen, um zu gewährleisten, dass die Instillationslösung während des Instillationszykluses ausschließlich in den Wundraum gelangen kann
• vi) Optional Öffnen eines Schnelltrennverbinders, welcher den geräteseitigen Abschnitt des Leitungsmittels mit dem wundseitigen Abschnitt des Leitungsmittels verbindet und Einsetzen eines Instillationsadapters, wobei der Instillationsadapter sowohl mit dem am Schnelltrennverbinder vorhandenen ersten Steckerteil als auch mit dem am Schnelltrennverbinder vorhandenen zweiten Steckerteil verbunden wird. Dieser Verfahrensschritt ist nur erforderlich, wenn der Instillationsadapter noch nicht zwischen dem ersten und dem zweiten Leitungsmittelabschnitt eingesteckt wurde.
• vii) Verbinden des in dem Instillationsadapter verzweigt vorhandenen Lumens (Sauglumen oder alternativ das Spüllumen) mit einem eine Instillationslösung enthaltenden Behältnis.
• viii) Einbringen der Instillationslösung in den Wundraum, wobei die Instillationslösung passiv (d.h. beispielsweise der Schwerkraft folgend und/oder gegebenenfalls durch einen im Wundraum vorhandenen Unterdrucks angesaugt) oder aktiv (beispielsweise durch eine Pumpe oder Spritze) in den Wundraum eingebracht werden kann
• ix) Abwarten der vom Anwender gewünschten Einwirkungsdauer, beispielsweise 1 Minute, 5 Minuten, 10 Minuten, 30 Minuten oder 1 Stunde.

In the following, it will be described in detail how the under-pressure wound treatment system according to the invention can be used to treat a wound. The method described below is part of the present invention. The method of combined negative pressure treatment and instillation therapy includes one or more of the following steps:

• i) providing a negative pressure wound treatment system as described above.
• ii) applying a vacuum dressing to a wound of a patient to produce an airtight wound space.
• iii) performing the negative pressure treatment on a patient, wherein the wound space is subjected to negative pressure.
• iv) interrupting the vacuum treatment by switching off the vacuum source.
• v) Preferably clamping a device-side portion of a multi-lumen conduit means. In this case, both the suction lumen and the flushing lumen should be disconnected. The clamping is preferably accomplished by means of a conventional hose clamp. Disconnection should be made to ensure that the instillation solution is used during the Instillation cycle can only get into the wound room
• vi) Optionally opening a quick release connector which connects the device side portion of the conduit means to the wound portion of the conduit means and inserting an instillation adapter, the instillation adapter being connected to both the first connector part provided on the quick disconnect connector and the second connector part present on the quick disconnect connector. This process step is only required if the instillation adapter has not yet been inserted between the first and the second conduit section.
• vii) connecting the branched lumen in the instillation adapter (suction lumen or alternatively the flushing lumen) to a container containing an instillation solution.
• viii) introducing the instillation solution into the wound space, whereby the instillation solution can be introduced into the wound space passively (ie following gravity for example and / or possibly sucked by a negative pressure present in the wound space) or actively (for example by a pump or syringe)
• ix) Waiting for the duration of exposure desired by the user, for example 1 minute, 5 minutes, 10 minutes, 30 minutes or 1 hour.

Optionally, a renewed application of negative pressure can subsequently take place, wherein at the same time the instillation solution present in the wound space is partly or substantially completely sucked off again.

For this purpose, the instillation adapter can be removed again and it can be connected to each other at the Leitungsmittelabschnitten first and second connector parts.

Advantageously, however, the renewed application of negative pressure takes place with interposed instillation adapter, whereby the branched lumen provided for supplying the instillation solution has to be closed or clamped off. Furthermore, if necessary existing terminals on the conduit must be removed. In the course of wound treatment, further instillation cycles can be performed as needed.

One of the embodiments of the instillation adapter already described above may additionally be used for a further purpose as required: In the embodiment which has a branch in the suction lumen, another branch-wound conduit section can alternatively be provided to the branch present in the instillation adapter instead of the container containing an instillation solution be connected. This additional, wound-side conduit section can communicate with a further vacuum connection means, in order, if appropriate, to pressurize a further wound site with negative pressure. It is also conceivable, in particular in the case of a large-area wound, to supply one and the same wound site with two vacuum connection means. The connected to the branch further vacuum line comprises only a suction lumen and can not be flushed with ambient air. If the instillation adapter is provided for the additional use proposed here, the branching lumen should open into a connection piece present on the instillation adapter, as already described in more detail above.

The connecting piece should preferably have a fit to the second plug part, so that the same version of the wound-side conduit section can be plugged. The flushing lumen present in the second connector part then terminates in the fitting or in the instillation adapter, i. the flushing lumen present in the conduit section is not continued.

characters

The schematic representations shown below illustrate, by way of example, specific embodiments of the under-pressure wound treatment system according to the invention or of the instillation adapter present in the under-pressure wound treatment system. The present invention is not limited to the embodiments shown herein by way of example only.

1 shows an embodiment of the vacuum wound treatment system according to the invention.

2 shows a variant of an instillation adapter with a permanently attached flexible hose.

In 3 shows a further variant of an instillation adapter with a fitting for an instillation component.

LIST OF REFERENCE NUMBERS

1

A wounded body part of a patient

2

 Vacuum bandage applied to the body of a patient

3

 Vacuum connection means (port)

4

 Wound-sided portion of the multi-lumen conduit

5

 Female-trained second plug part

6

 Male trained first connector part

7

 Plastic body

8th

Flexible hose

9

 Luer lock adapter

10

Equipment side portion of the multi-lumen conduit means

11

 Instillation adapter with connection piece

12

 Instillation adapter with connection hose

13

 Branched suction lumen

14

Unbranched through flushing lumen

15

 As a male plug part trained second fit

16

 As a female plug part trained first fit

17

 Decommissioned lumen

18

 Connector for connecting an instillation component

19

 Instillation connector for connecting an instillation container

20

 Vacuum therapy device

21

 Sputum present in the device-side section of the conduit

22

 In the device-side section of the conduit means existing suction lumen

23

 collection jar

24

Air filter for the second fluid path

25

 Air filter at the outlet of the secretion container

26

 First pressure sensor

27

Electric suction pump

28

 Electrically controllable ventilation valve

29

 Second pressure sensor

30

 Secretion container unit

35

Electronic control unit

40

 Container (syringe) with instillation solution

1 1 shows a schematic illustration of an embodiment of the under-pressure wound treatment system according to the invention with a negative pressure therapy device ( 20 ), multi-lumen conduit ( 10 . 4 ), Quick disconnect connectors ( 5 . 6 ) and instillation adapter ( 12 ). The vacuum wound treatment system further includes a vacuum connection means ( 3 ), which on the outside of a vacuum dressing ( 2 ) is available. The vacuum bandage ( 2 ) covers one on a body part ( 1 ) of a patient existing wound airtight. The airtight seal of the wound creates a closed wound space, which can be subjected to negative pressure. The quick disconnect connector, which in 1 is shown in the open state, is for the reversible connection of the wound conduit section ( 4 ) with the device-side line middle section ( 10 ) and includes the male connector in the example shown here first connector part ( 6 ) and the female trained second connector part ( 5 ). The in 1 shown instillation adapter ( 12 ) comprises a plastic body ( 7 ) and the first () provided for connection to the two conduit sections ( 16 ) and second ( 15 ) Fits. Inside the plastic body ( 7 ), which is usually an injection molded part, has a suction lumen and a flushing lumen (in Figs 1 not shown). At the in 1 exemplified embodiment, the suction lumen in the instillation adapter ( 12 ), while the flushing lumen has a branch. The branching of the Spüllumens opens into a flexible hose ( 8th ) with a Luer lock adapter ( 9 ), which is lockable. To the Luer lock adapter ( 9 ) a container can be connected to an instillation solution, for example a syringe ( 40 ). The flexible hose ( 8th ) is with the plastic body ( 7 ) inseparably connected.

According to another, in 1 not shown, but also preferred embodiment, the branch is present in the suction lumen, while the rinsing lumen is performed unbranched.

The instillation adapter ( 12 ) can be inserted between the masculine first connector part ( 6 ) and the female trained second connector part ( 5 ) are inserted. For this purpose, the instillation adapter ( 12 ) via a to the first plug part ( 6 ) compatible first fit ( 16 ) and one to the second plug part ( 5 ) compatible second fit ( 15 ). The first fit ( 16 ), what a 1 female is formed in order with the masculine first plug part ( 6 ), as well as the second fit ( 15 ) can with the plastic body ( 7 ) in one piece (for example as an injection molded part). Alternatively, the fits can first be produced as separate plug components and then with the plastic body ( 7 ) are permanently connected (for example by gluing). If the first fit ( 16 ) is first manufactured by the manufacturer as a separate component, in order then with the housing ( 7 ), this separate component can be identical to the female second plug part ( 5 ) be. Accordingly, the second fit ( 15 ), what a 1 is formed male, identical to the masculine-trained first connector part ( 6 ).

The in the instillation adapter ( 12 ) unbranched continuous suction lumen can with the device in the middle line section ( 10 ) existing Sauglumen be connected by the first plug part ( 6 ) with the first fit ( 16 ) is put together. In the same way, a fluid connection between the in the instillation adapter ( 12 ) existing flushing lumen and in the device-side line middle section ( 10 ) existing Spüllumen be prepared. Fluid connections between those in the instillation adapter ( 12 ) existing lumen with the corresponding lumen in the wound line section ( 4 ) can be achieved by plugging together the second plug part ( 5 ) with the second fit ( 15 ) getting produced.

The in the wound line section ( 4 ) existing suction lumen is for negative pressure communication with a vacuum source ( 27 ) intended. The vacuum source is usually an electric pump ( 27 ), in particular an electronically controlled diaphragm pump. The activity of the pump ( 27 ) is controlled by an electronic control unit ( 35 ) controlled. The electronic control unit ( 35 ) can by the user by means of an operating unit (in 1 not shown) controlled and / or programmed. The between the electronic control unit ( 35 ) and the pump ( 27 ) existing electrical connections are in 1 dashed lines, as well as the electrical connections between the electronic control unit ( 35 ) and the pressure sensors ( 26 . 29 ) as well as with the valve ( 28 ). The negative pressure therapy device may include other electrical or electronic components that are incorporated in 1 not shown, for example, a display, switch, a power supply or electronic interfaces. At the in 1 illustrated embodiment, a secretion container ( 23 ) available. The secretion container ( 23 ) is usually arranged in the first fluid path, ie between the wound space and the vacuum source. In the schematic representation in 1 ends in the device-side line middle section ( 10 ) existing suction lumens ( 22 ) into the secretion container ( 23 ) one. The outlet of the secretion container ( 23 ) can with the pump ( 27 ) communicate. Furthermore, at the outlet of the secretion container ( 23 ) a filter ( 25 ), which is a passage of wound exudate to the vacuum source ( 27 ) should prevent. To the fluid connection between the outlet of the secretion container ( 23 ) and the vacuum source ( 27 ), a first pressure sensor ( 26 ), by means of which the negative pressure in the first fluid path can be detected. The pressure sensor ( 26 ) are sent to the electronic control unit ( 35 ). Preferably, in the negative pressure therapy device ( 20 ) existing portion of the suction lumen of the present in the device-side conduit section suction lumen ( 22 ) be separable. An appropriate connection point (in 1 not shown), for example, on the side of the filter facing the pump ( 25 ) be provided.

The in the wound line section ( 4 ) existing Spüllumen ends on the device side of an electrically controllable ventilation valve ( 28 ). The activity, ie the opening state of the ventilation valve ( 28 ) is controlled by the electronic control unit ( 35 ). Furthermore, near the device-side end of the second fluid path, an air filter ( 24 ) to prevent the entry of contaminants (eg airborne germs) into the wound space. According to the in 1 a special embodiment, a second pressure sensor ( 29 ), which is also connected to the electronic control unit ( 35 ), with the flushing lumen, that is with the second fluid path. It is also possible to provide only one pressure sensor which can communicate either with the first fluid path or alternatively with the second fluid path. As already described in connection with the first fluid path, the second fluid path can also have a connection point for the flushing lumen (FIG. 21 ) in the area of the negative pressure therapy device ( 20 ), so that the flushing-lumen section present in the therapy device differs from that in the device-side conduit section (FIG. 10 ) existing Spüllumen ( 21 ) can be separated. A possible connection point could be, for example, on the venting valve ( 28 ) side facing the air filter ( 24 ) be provided.

The vacuum source, ie the pump ( 27 ), the electronic control unit ( 35 ), the ventilation valve ( 28 ) as well as the pressure sensors ( 26 . 29 ) are preferably housed in a single housing. The secretion container ( 23 ) should be attached to the housing of the negative pressure therapy device ( 20 ) can be coupled, wherein simultaneously with the coupling the above-mentioned fluid connections with the vacuum source (first fluid path) or with the vent valve (second fluid path) are produced. The filter components ( 24 . 25 ) should preferably be present on the disposable secretion container so that it can be used together with the secretion 23 ) can be disposed of (the entirety of secretion canisters and the filter components ( 24 . 25 ) is present as a secretion container unit ( 30 ) designated). To the secretion container unit ( 30 ) can already manufacturer side of the line section ( 10 ). The therapy device ( 20 ) and the secretion container unit ( 30 ) are preferably dimensioned and shaped so that they can be carried on the body of a user.

A negative pressure treatment of a patient can be performed using the method described in 1 vacuum wound treatment system shown are performed either when the wound-side conduit section ( 4 ) by means of the quick disconnect connector directly to the device-side line middle section ( 10 ), ie when the first plug part ( 6 ) to the second plug part ( 5 ) was inserted (in 1 Not shown). Alternatively, a negative pressure treatment can be performed even if the instillation adapter ( 12 ) is interposed, as in 1 proposed. The user only has to make sure that the am Luer lock adapter ( 9 ) existing opening (in 1 not recognizable) is closed.

Instillation treatment may be accomplished by using an instillation source (eg, a syringe 40 with an instillation solution) to the Luer-Lock adapter ( 9 ) is connected. At the same time, the device-side line middle section ( 10 ) are disconnected.

2 shows a variant of an instillation adapter with a permanently attached thereto flexible hose ( 8th ), which by means of the tube on the luer lock adapter ( 9 ) for connecting a container ( 40 ) is provided. The inside of the plastic body ( 7 ) existing lumen (suction lumen 13 and flushing lumens 14 ) are in 2 indicated by dashed lines. Unlike the in 1 In the embodiment shown in FIG 2 shown instillation adapter ( 12 ) one in the suction lumen ( 13 ) branching, so that instillation solution via the suction lumen ( 13 ) can be introduced into the wound space. The flushing lumen ( 14 ) goes from the first fit ( 16 ) to the second fit ( 15 ) unbranched by. The second fit is in 2 exemplarily as a male plug part ( 15 ) educated. The second fit ( 15 ) can then with a wound on the wound line section ( 4 ) existing female plug part ( 5 ), as in 1 shown. Accordingly, the first fitting provided for connection to the device-side line middle section (FIG. 16 ) in 2 exemplified female and can be connected to a male connector. The branching suction lumen ( 13 ) has inside the plastic body ( 7 ) a Y-shape. Preferably, as in 2 the arm of the suction lumen formed vertically at the letter Y should be arranged towards the wound, while the arms of the suction lumen pointing diagonally upwards at the letter Y should be arranged towards the vacuum source or to the instillation source. Such an arrangement has the advantage that both the device-side conduit section and the connection tube for the instillation container point towards the patient. Overall, this results in an ergonomic arrangement of the conduit.

3 shows a further preferred variant of an instillation adapter. Unlike the in 2 illustrated embodiment of the instillation adapter is in the suction lumen ( 13 ) existing branch connected to a third fit. The third fit ( 18 ) serves as a fitting for connecting an instillation component. Preferably, the instillation component using the in 3 shown instillation connector ( 19 ) with the instillation adapter. The Instillation Connector ( 19 ) includes a to the connector ( 18 ) compatible plug part, which with a flexible hose ( 8th ) connected is. On the hose ( 8th ) is a Luer lock adapter (as in the examples previously shown) ( 9 ) available. Overall, identical male and female connector parts can be used throughout the wound treatment system according to the invention. Is used to realize the third fit to the second fit ( 15 ) uses identical plug part, the second lumen in the plastic body ( 7 ) be shut down, so end dead. The disused lumen is in 3 with the reference number 17 indicated.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2011076340 [0005]
• WO 1997018007 [0005, 0036]
• WO 2011018133 [0007, 0007, 0034]
• EP 2014/076921 [0009]
• WO 2013116158 [0009, 0009]
• WO 2014177544 [0015]
• WO 2014177545 [0015]
• WO 2012022485 [0037]

Claims (15)

A negative pressure wound treatment system for negative pressure therapy of wounds on the human or animal body, comprising i) a negative pressure therapy device having a vacuum source which can be brought into fluid communication with a suction lumen, a vent valve which is brought into fluid communication with a flushing lumen and with ambient air and, with an electronic control unit, ii) a multi-lumen conduit having a suction lumen and a flushing lumen, wherein the suction lumen can form a portion of a first fluid path from the vacuum source to a wound during the vacuum therapy so that negative pressure can be applied to the wound and fluids may be aspirated from the wound, and wherein the irrigation lumen during negative pressure therapy may form a portion of a second fluid path from the vent valve to a sore mouth of the suction lumen so as to supply ambient air to the suction lumen to clear the suction lumen iii) a multi-lumen quick release connector for reversibly establishing fluid communication between the suction and purging lumens of the device side portion of the conduit means and the respective lumens of the wound side portion of the conduit means, the quick disconnect connector comprising a first connector part provided on the device side portion of the conduit means and a second connector part provided on the wound side portion of the conduit means, characterized in that the underpressure wound treatment system comprises a multi-lumen instillation adapter having a suction lumen and a flushing lumen interposed between the lumen device-side portion of the conduit means and the wound-side portion of the conduit means can be reversibly introduced by a first fit to the device on the device in the instillation adapter, either - the suction lumen is made unbranched from the first fit to the second fit, while the purging lumen intervenes between the first fitment and the second fitment first branch and the second fit has existing branch, so that over the existing at the flushing lumen from the outside an instillation liquid can be introduced into the flushing lumen, or - the flushing lumen is performed unbranched from the first fit to the second fit, while the suction lumen a between the first fit and the second fit existing branch, so that on the suction lumen branching from the outside an instillation liquid can be introduced into the suction lumen. A vacuum wound treatment system according to claim 1, further comprising a first pressure sensor, which can communicate with the suction lumen and / or a second pressure sensor, which can communicate with the flushing lumen, so that during the negative pressure therapy, the negative pressure in the area of the wound can be determined. Vacuum-wound treatment system according to claim 1 or 2, wherein the vacuum source, the electronic control unit, the venting valve and - if present - the first and / or the second pressure sensor are housed in a single housing. A negative pressure wound treatment system according to claim 3, wherein said negative pressure therapy device is a device that can be carried on a user's body. A vacuum wound treatment system according to one or more of the preceding claims, further comprising a secretion container for collecting the aspirated fluids, wherein the secretion container can be preferably coupled to the negative pressure therapy device. A vacuum wound treatment system according to claim 5, wherein the secretion vessel may form a further portion of a fluid path from the vacuum source to a wound. Vacuum wound treatment system according to one or more of the preceding claims, further comprising a preferably self-adhesive covering material for airtight sealing of the wound space. Vacuum wound treatment system according to one or more of the preceding claims, further comprising a vacuum connection means (port) for the functional connection of an airtight sealed wound space with the present in the wound portion of the conduit means suction and irrigation, so that a negative pressure in the wound space can be produced and / or liquids the wound space can be aspirated and / or wound fluid can be supplied to the wound space and / or the irrigation lumen can be flushed free with ambient air, the negative pressure connection means ( 18 ) preferably for Attachment is provided on the outside facing away from the wound in use of the cover material. Vacuum-wound treatment system according to one or more of the preceding claims, characterized in that the branched lumen present in the instillation adapter has a substantially Y-shape, wherein the arm of the Y formed vertically in the letter Y is arranged in the instillation adapter towards the wound. A negative pressure wound treatment system according to claim 8 or 9, wherein a sore opening of the suction lumen is provided directly in the negative pressure connection means, and wherein a sore opening of the lavage lumen is also directly present in the negative pressure connection means. Vacuum-wound treatment system according to one or more of the preceding claims, characterized in that in the instillation adapter from the suction or the flushing lumen branching lumen is continued either in a flexible hose, which is designed to connect an Instillationskomponente and which has at its open end a closure means or that the branching lumen opens into a connection piece present on the instillation adapter, which connection is designed to connect an instillation component and which preferably has a means for closing the open lumen. A vacuum wound treatment system according to claim 11, wherein the lumen branching off the suction or the flushing lumen in the instillation adapter is continued in a flexible tube provided with a luer-lock adapter at its open end. A vacuum wound treatment system according to the second alternative of claim 11, wherein the vacuum wound treatment system further comprises an instillation connector suitable for connection to the fitting. A vacuum wound treatment system according to one or more of the preceding claims, wherein the ventilation valve is a permanently existing ventilation opening or an electrically controllable valve. Supplementary kit for a negative pressure wound treatment system according to the preamble of claim 1, comprising an instillation adapter according to one or more of the preceding claims 1, 9, 11 or 12 and optionally a hose clamp.

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