EP2629815A2

EP2629815A2 - Collection device for use in a drainage device

Info

Publication number: EP2629815A2
Application number: EP11775938.1A
Authority: EP
Inventors: Birgit Riesinger
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-20
Filing date: 2011-10-20
Publication date: 2013-08-28
Also published as: WO2012052519A2; DE102010060543A1; US20130304004A1; WO2012052519A3

Abstract

What is provided is a collection device for use in a drainage device for treating wounds using negative pressure, wherein said collection device is provided entirely or partially with at least one insert containing liquid-absorbing polymers.

Description

Collection device for use in a drainage device

The invention relates to a collecting device for use in a drainage device for wound treatment using negative pressure.

In the treatment of open wounds, the use of sutures and staples are common methods. However, such mechanical closure methods have the disadvantage that they can exert great stress on the tissue around the wound and possibly even lead to tearing. In addition, these procedures can not be applied to severely inflamed wounds or to very large and / or deep open wounds. For the treatment of such wounds, drainage methods have long been used in which the wound can be kept dry and clean by the application of a continuous negative pressure to the wound, so that the migration of epithelial tissue and subcutaneous tissue into the wound is improved. The wound exudates are collected in a collecting container, eg a Redon bottle, and then disposed of. However, the collection containers for liquid wound exudates used in conventional drainage methods are associated with considerable disadvantages. One of the biggest problems is the proper and safe handling of the sometimes highly infectious fluids, which may spill when changing the collection device. In WO96 / 05873 a wound drainage system is described in which the collecting container is additionally filled with a gel-forming substance, eg polyacrylamide, so that the therein Trapped drainage fluid is immobilized. The binding of Wundexsudate the risk of contamination is reduced because usually no fluid can escape even when tilting the collection device. However, the loose bed of such a gel-forming substance has the disadvantage that no control over a targeted expansion of the substance in the swollen state is possible. Although the liquid is immobilized as far as possible, the mass remains mobile as such within the collecting device and therefore can still lead to contamination by spilling of the swollen mass. Moreover, cleaning and sterilization of such containers remains difficult unless the gel is disposed of with the container.

SUMMARY OF THE INVENTION

It is an object of the present invention, inter alia, to better manage the exudate obtained in wound treatment using negative pressure in relation to the risk of contamination emanating from it and in relation to its inherent physiological and pathological significance.

This object is achieved with the features of the claims presented. BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows a collecting device 5 with lid 30 and spray head 22 with a loose bed of liquid-absorbing substances. 2 shows a collecting device 5 according to the invention with cover 30 and spray head 22 with an inner lining made of an immobilized liquid-absorbing insert 16. FIG. 3 shows a collecting device 5 according to the invention with cover 30 and spray head 22 with a plurality of immobilized liquid-absorbing layers 16, which are enveloped by foil 17. FIG. 4 a shows a collecting device 5 with an inner container 15 and a liquid-absorbing insert 16.

Fig. 4b shows the removal of the inner container 15 from the collecting device 5 with a liquid-absorbing insert 16 in the used state.

5 shows a collecting device 5 according to the invention with a cover 30 and a bottle-shaped spray head 22 with an inner lining made of an immobilized liquid-absorbing insert 16. FIG. 6 shows a collecting device 5 according to the invention with a pivotable cover 30 and a spray head 22 with an inner lining of one immobilized liquid-absorbent insert 16.

FIG. 7 a shows a collecting device 5 according to the invention with a bag-shaped inner container 15.

FIG. 7 b shows the removal of the bag-shaped inner container 15 from the collecting device 5.

8 shows a spiral-shaped spray head 22 with outlet openings 23.

9 shows a helical spray head 22 with outlet openings 23. 10 shows a collecting device 5 with a distributor 50.

FIG. 11 shows the installation situation of the collecting device 5 with respect to the entire drainage device 100 shown in FIG. 14.

FIG. 12 shows the installation situation of the collecting device 5 with respect to the entire drainage device 100 shown in FIG. 14 with different supply units 31, 35, 36.

FIG. 13 a shows a collecting device 5 with a cover 30 and spray head 22 integrated in the cover.

Fig. 13b shows the lid 30 with the spray head 22 and the outlet openings 23 in plan view. Fig. 14 shows the device 100 according to the invention in its entirety.

Fig. 15a shows a shredding device 48 for installation in a drainage tube in the vertical section. Fig. 15b shows a shredding device 48 for installation in a drainage tube in cross section.

Fig. 15c shows the installation of a shredder 48 in a drainage tube 4. Figs. 16 and 17 show further embodiments of a stationary vacuum pump. Figs. FIGS. 18-21 show further embodiments of a mobile vacuum pump. DETAILED DESCRIPTION OF THE INVENTION According to the invention, there is provided a collection device for use in a drainage device for wound treatment using negative pressure, said collection device being wholly or partially provided with at least one fluid-absorbent polymer-containing insert. In an alternative embodiment, an analysis device is provided for the examination of body-derived exudates obtained by suction for physiological and / or pathological parameters.

Preferably, the collecting device or the analysis device is introduced into a drainage device for wound treatment using negative pressure, which furthermore has a gastight wound covering element, a suction head, at least one drainage tube, and optionally a negative pressure source.

In its simplest embodiment, the collecting device according to the invention is, for example, a mat which contains liquid-absorbing polymers. Such a mat may, for example, comprise a cellulose fleece and, with or without a sheath, be introduced into a drainage device for wound treatment using negative pressure. Alternatively it can be provided that the collecting device comprises a container containing the said insert. The container preferably has a rigid and possibly pressure-resistant wall. For example, such a container may take the form of a canister or a surface, similar to a redone bottle. The insert containing the liquid-absorbent polymer may be a loose fill. Alternatively, it can preferably be provided that the insert containing liquid-absorbent polymers is spatially defined or limited, for example in the form of a textile material, a bag, a wall cladding, a disposable container containing said polymers or the like. The advantages of all of these embodiments are better hygiene, better protection against spillage or leakage, for example when tilting the device and / or - in some embodiments - easier removability of the said insert. These advantages will be discussed in detail below and will be apparent from the figures.

Said negative pressure source is preferably selected from the group comprising a) electrically operated vacuum pump

b) Hand operated vacuum source, and / or

c) evacuated vacuum vessel. The said vacuum pump may be a solitary pump, but it may also be part of a centralized suction system, as is often used in clinics. In this case, wall-mounted vacuum connections are provided in the patient rooms, to which the drainage devices according to the invention for wound treatment can be connected. In this case, said vacuum pump can vacuum a plurality of wound treatment drainage devices according to the invention. In principle, any suitable pump system can be used as long as the pump is capable. The pump must be able to draw negative pressures of -80 - -200 mm Hg, and it must preferably be able to carry liquids. Said evacuated vessel can be connected similar to the known redone bottle to the device according to the invention for wound treatment and put them under negative pressure. Said evacuated vessel has a liner containing liquid-absorbent polymers, preferably in the form of a wall lining.

Here, in particular - and this applies to all embodiments discussed in this application - not only to the classical vacuum wound care systems, but also to postoperative drainage systems, as they come for example after arthroscopy used.

Particularly preferably, said evacuated vessel may be provided in the form of a cartridge which is placed in a holder which is already connected to the drainage device according to the invention for wound treatment. When the cartridge is full, it is removed and disposed of, and a new evacuated cartridge can be placed in the holder.

Particularly advantageous are the aforementioned embodiments, because by dispensing with a separate pump and instead using an evacuated vessel, the device is mobile and independent of the mains, so that the patient himself is mobile. In addition, as a smaller construction can be achieved, which allows the patient to discretely hide the device. For this purpose, in particular, an anatomically adapted configuration of the said evacuated vessel or the mentioned holder is advantageous, which allows unobtrusive carrying of the same, for example on the leg. Furthermore, such a device makes no operating noise and is very easy to use. The same applies to the mentioned manual operated vacuum source. In the simplest case, this can be a plastic syringe with a sufficiently high volume. Other possibilities are in a pump similar to a rubber ball, a bellows, etc. The aforementioned drainage tube may be at least partially provided with a sheath having superabsorbent polymers or having an inner wall coating comprising superabsorbent polymers. Preferably, it is then executed double-walled coaxial, wherein the superabsorbent polymers can be introduced in the intermediate space between the two tube walls. In this way, leakage of exudate can be prevented if the drainage tube leaks; In addition, such a self-sealing sheath can be formed. This embodiment also has the advantage that it reinforces, at least in sections, the tube walls and thus protects them from collapsing when negative pressure is applied. The gas-tight wound covering element is used to close the wound so that a negative pressure can be connected. Within the wound space located under the wound covering element, an absorption body can additionally be inserted, which additionally absorbs and absorbs wound exudates. In addition, to protect the wound, an additional liquid-permeable film element is conceivable (so-called wound distance grid), which protects the wound from sticking to the absorbent body and / or the wound covering element located above it. Such wound systems are well known and described for example in DE 202005010653 Ul.

The wound-covering element has at least one opening for connecting a suction head, which serves as a connection for a drainage tube, which in turn leads via an inlet into a collection device for the wound exudates. The collection device has at least one liquid-absorbent polymer-containing insert, which is designed for receiving and absorbing the wound exudates. Preferred is their maximum Expansibility in the wetted state is adapted to the internal volume of the collecting device.

The term "maximum expansion capacity" is understood to mean the greatest possible expansion of the insole as a result of the absorption of wound exudates, which is coordinated with the internal volume of the collection device in such a way that, at maximum expansion, no damage to the container or the drainage components leading into it. A kinking or breaking off of certain system components is also taken into account in the dimensioning of the insert in advance, so that expansion through absorption does not adversely affect the function of the drainage system.

The term "immobilized" in this context means that the insert containing liquid-sorting polymers is not present as a loose filling but is held together in a form suitable for the respective application, which in a preferred embodiment may be a foam, a textile material and / or a homogeneous non-textile polymer material containing liquid-absorbing polymers such as superabsorbent particles or fibers The insert can also be configured as a film with a layer thickness of 1 to 3 mm, which consists for example of CMC, water, glycerol and superabsorbent particles. Glycerol and SAPs are bacteriocidal and fungistatic, but a textile material with incorporated superabsorbent particles or fibers is just as possible as a foam or sponge material with correspondingly added polymers Absorption bodies which are suitable for use in the collection device are sufficient known and belong to the state of the art.

The liquid absorbent pad is located within the collection device. The container may be partially, ie only in certain areas, or as a whole with such an insert, for example, in the form of an inner lining occupied. The deposit is either the loose applied or reversible or - in disposable products - irreversibly connected to the inner wall of the collecting device. Several superimposed layers in partial areas or as a complete interior lining are possible. The present device is particularly in view of the controlled Absorptionsbzw. Swelling process within the collection device of decisive advantage, since thus increased safety in handling is achieved. The liquid wound exudates are immediately absorbed by the fluid-absorbing pad (s) and the swollen pad also remains stable is not present as a loose gel mass that could still leak. Spilling and associated contamination by the wound exudates is thus excluded, both in liquid and in bound form.

In addition, the device has the advantage that the collection device is easier to disinfect, since the liquid-absorbent insert as a whole can be disposed of together with the ab- sorbed Wundexsudaten and must not be removed as a gel-like mass from the container. Conversely, inserting the inserts into the collection device is simpler than e.g. in a loose bed of gel-forming substances would be. The simple disposal means at the same time also an odor minimization, since the bound Wundexsudate cause both during the application as well as with the disposal no odor nuisance. Optionally, the collection device may even be used repeatedly in the same patient, if necessary, before it has to be emptied and then possibly disinfected. Another advantage of the application is the reduction or elimination of the noise nuisance for the patients, as the fluids are absorbed directly and thus little or no noise is produced by the drained wound exudates as they enter the collection device.

Furthermore, various safety elements, eg tilt sensors, which are intended to prevent spillage of wound exudates or overflow of the collecting device, can be forgiven. without compromising safety. Thus, the present drainage system is less expensive to construct and more cost effective.

In a further embodiment, the liquid-absorbent insert is at least partially enveloped by a liquid-permeable film which rests flat on the insert. Through the shell, the insert therein is additionally protected and held together, which is particularly advantageous for flexible materials such as a textile fabric or non-woven with superabsorbers. The sheath closely conforms to the underlying absorbent layer and may e.g. be connected at the bottom with the inner wall of the collecting device. As a shell, e.g. a sheet-like material with corresponding perforations, but also a nonwoven material, provided that it is suitable to forward the Wundexsudate to the absorbent body on.

In a particular embodiment, a removable inner container, in particular a bag, is arranged between the liquid-absorbent insert and the collecting device. The inner container fits substantially into the collection device so that the entire internal volume of the collection device is utilized. In the case of a bag, the shape of the bag is preferably adapted to the collecting device so that it e.g. can be disposed of as a disposable product together with the absorbed wound exudates. The bag may be made of plastic as well as textile or paper-like material, similar to a vacuum cleaner bag. This makes an even easier cleaning and disinfection of the reusable collection device possible. Much like a Staubsaug bag, it can also have an input valve in the form of a spring-mounted flap.

Incidentally, the said bag can also function as a collecting device per se, ie in this case it is not inserted into a collecting device, but acts as said collecting device itself. In a further embodiment, the inner container is biodegradable. The liquid-absorbent inserts may be both prepared in the inner container, or introduced into the inner container after it has been placed in the collecting device. As an alternative to a bag, a reusable inner container is also possible, which, like the collecting device, can be cleaned and disinfected.

As already mentioned, the inner container may consist of a disposable material or be fitted as a solid container in the collecting device and reused. The collecting device, in turn, may be made of glass, plastic or metal and both reused and constructed as a disposable product.

In another embodiment, the liquid-absorbent insert is connected to the inner wall of the collecting device or the inner wall of the inner container. This may be a reversible compound in the case of reuse of the container or may be an irreversible compound e.g. by gluing, as long as it is a disposable container. If the liquid-absorbent insert is provided with a sheath, only the sheath can be connected to the collecting device or the inner container.

In a further embodiment, spacing means, which counteract the expansion of the liquid-absorbent insert in the direction of the center of the container, are arranged in the collecting device. This can be, for example, an inner basket, a (wire mesh or another type of framework which is suitable for the expansion of the liquid-absorbing insert to leave a free space in the interior, which is not filled with the absorption layer.At the same time, such means serve as spacers for the Components that discharge into the collecting device, such as the Drainage tube, measuring probe and / or the spray head or distributor for spraying / distributing the liquid wound exudates.

This is also the feature of another embodiment in which within the collection device at least one spray head connected to the inlet is arranged with one or more outlet openings. The spray head performs two functions: On the one hand, a better distribution and thus wetting of the liquid-absorbent deposits is ensured because the shape of the spray head and the arrangement outlet openings is largely matched to the number and arrangement of the deposits. On the other hand, due to the fine distribution of the liquid, the noise nuisance as it would be with a dripping liquid is minimized. Ideally, the outlet openings of the spray head are directed to the liquid-absorbing deposits. The spray head, but also the collection device or the inner container can also be equipped with a hydrophobic coating to promote the absorption by the liquid-absorbing deposits and to direct in the appropriate direction.

In another embodiment, the spray head is pivotable and / or rotatable, i. movably disposed within the collection device. This achieves an improved distribution of the wound exudates and, at the same time, creates a construction which makes it possible to place an inner container when the spray head is pivoted outward.

The spray head itself has a cylindrical, spherical, spiral, conical, bottle or screw shape. The exact shape depends on the type and shape of the collecting device and the liquid-absorbing deposits, as well as the liquids to be drained.

In a further preferred embodiment, the collecting device has a lid with at least one inlet, preferably a removable and / or pivotable lid. This will both clean and disinfect the collection device as also facilitates the arrangement of an inner container. Alternatively, the collection device is made in a piece of material including cover. For this purpose, common manufacturing processes are used depending on the choice of material. In a further embodiment, a flow sensor and a shut-off valve are arranged in front of the spray head. The object of such a flow sensor is to strike alarm after reaching a certain filling state in the collecting device and to close a check valve located in front of the flow sensor or a terminal, so that it does not come to overflow the collecting device. In addition, below the spray head, a pipe section can connect, which leads out of the collecting device via a bottom opening and also has a shut-off valve. Behind the pipe section leading out of the collecting device, a pump for generating negative pressure can be connected and connected to the collecting device via a starting suction line and the shut-off valve.

Likewise, it is preferably provided that the device further comprises a comminution device for comminuting particulate constituents of the aspirated exudate.

Preferably, it is further provided that the device according to the invention further comprises a dropper or a weighing device for determining the amount of wound exudates transferred into the collecting device. In this way, it is ensured that the amount of exudate removed can always be precisely determined - which otherwise is not readily possible due to the use of the superabsorbent polymers. Said dropper is combined in a preferred embodiment with the flow sensor.

When exceeding or falling below a predetermined range of the amount of exudate discharged, it can be provided that the device makes recommendations for increasing or decreasing the exudate. tion of the suction rate - for example, the set negative pressure - are, which are then confirmed by the doctor by pressing a button. Possibly. For example, the device can even adapt the negative pressure itself to the mentioned range. Furthermore, it is preferably provided that the device according to the invention further comprises a removal device for the removal of fresh exudate. Said removal device can be formed, for example, with flanges and valves commonly used in the catheter and infusion technique. It may also consist of a sealable in the liquid jet, lockable chamber (for example, a PE bottle). In this way, a doctor, for example, with a commercial disposable syringe, j dererzeit freshly discharged exudate take and example meadow a study.

Particularly preferably, this removal device can be designed such that it takes samples at given time intervals (approximately every 15 minutes). These can be analyzed by means of an analysis device with respect to physiological and / or pathological parameters and the values obtained can be stored so that they can be read by a physician at any time. Alternatively, the samples taken can also be preserved, in particular for the investigation of the germ load, for example by fixation or freezing, or spread on an agar plate. Preferably, a magazine of agar plates or sample vessels, for example in revolver form, is provided here, with which time series can be recorded.

Preferred physiological and / or pathological parameters are a) pH of the exudate b) Protein content

c) germ load

d) proportion of blood or blood cells in the discharged liquid, and / or

e) oxygen content.

Here, for example, a pH meter, an oxygen probe, a germ detector, a hemoglobin sensor or a protein sensor can be used.

He may then take immediate action, such as initiating antibiotic or topical administration of antimicrobial agents (eg, silver, copper, octenidine, antibiotics, etc.) or buffers, or administering an appropriate saline, wrestler or protein solution. In the presence of blood or blood cells in the discharged fluid, an alarm may be triggered and / or the pumping operation interrupted to prevent acute anemia.

It can also be provided that the device pronounces recommendations for wound irrigation, and then - if necessary after confirmation by the doctor - independently performs. For this purpose, flushing medium can be brought from a container into the wound via pump reversal. Said rinse solution may in particular contain the abovementioned agents or solutions.

It is particularly preferred that the device according to the invention has a device for determining the germ load and / or the material composition of the exudate. Such a device may be, for example, a biosensor (e.g., a biochip) or a color strip test strip.

With regard to the germ burden, multiresistant germs are of particular interest here, which are responsible, inter alia, for the notorious hospital infections, for example MRSA (methicillin-resistant Staphylococcus aureus), ORSA (oxacillin-resistant Staphylococcus aureus), VISA (vancomycin-intermediate Staphylococcus aureus) or VRSA (vancomycin-resistant Staphylococcus aureus). Such biosensors are based, for example, on the principle of immunoassay or that of a biochip - preferably in the form of a disposable product, or on aptamers. Those skilled in the art are aware of such technologies from the relevant literature.

With regard to the material composition of the exudate, in particular serum proteins (albumins), matrix metalloproteases, coagulation factors and proteins (for example thrombin, fibrin), inflammatory markers (cytokines), insulin or glucose are of interest, as well as those typical for kidney and liver values Marker. Here too, for example, the immunoassay principle can be realized, preferably in the form of a disposable product (test strip). Preferably, said biochip, preferably in combination with the operating and / or control element described below, has a memory into which the measured values for germ load and / or material composition of the exudate can be read and from which these can also be read out again. In this way, the temporal course of the composition of the exudate can be tracked and logged.

Furthermore, it is preferably provided that at least one liquid-conducting component of the device has a liquid-repellent (hydrophobic) coating, preferably a lotus-effect coating. In this way, the wetting of the surfaces is reduced, thereby facilitating a cleaning and making durable contamination more difficult. In particular, this can mitigate the consequences of misuse - for example, if a container that does not have a collection bag as intended - is exudate-transferred, as it facilitates the necessary cleaning. Furthermore, it is preferably provided that the device according to the invention has an operating and / or control element having a touchscreen. Said operating and / or control element can be designed, for example, in the form of a tablet PC. The touchscreen has the advantage that it is easier to sanitize than a conventional keyboard. The data transmission between operating and / or control element and the device, including a pump, can be carried out via conventional wire connections, but also wirelessly, for example via WLAN or Bluetooth or similar protocols. In addition to hygienic advantages, a wireless design also has the advantage that the operating and / or control element can be designed to be physically detached from the device.

The operating and / or control element can be detachably configured from the rest of the device, in particular detachably from the vacuum pump. In this way, it can be taken by the doctor, for example, to read out data while the device remains in operation on the patient. Furthermore, it is thus possible to design the operating and / or control element as a reusable product, while the remaining device or parts thereof, such as the collecting device or the vacuum pump, are designed as a disposable product. Other embodiments are illustrated below by the figures and experiments, by the concrete embodiment, the invention is not limited in any way. PICTURES

LIST OF REFERENCE NUMBERS

1 wound dressing

2 suction head

3 opening (from 1)

4 drainage hose

5 collection device

6 vacuum pump

7 flow sensor

8 hose connectors

9 floor (from 22)

10 housing

11 inlet

12 outlet

13 opening

14 floor

15 inner container

16 liquid-absorbing layer

17 foil

18 sampling point

19 inner wall

20 start suction line

21 shut-off valve

22 spray head

23 outlet opening

24 three-way valve 25 vacuum line

26 vacuum line

27 check valve

28 accumulator

29 display

30 lids

31 AC connection

32 pipe section

33 floor opening

34 shut-off valve

35 DC connection

36 solar element

37 flow sensor

38 shut-off valve

39 bleed valve

40 bacterial filters

41 control module

42 LCD display

43 control unit

44 microcamera

45 fluorescent screen

46 piezoelectric vibration module

47 signal line

48 shredder

49 cutting edge

50 distributors

51 control module

52 pump module 53 touchscreen

54 battery compartment

55 pump

56 removable collection device

57 drainage hose

58 mounting straps

59 bellows

60 valve

61 pump

100 drainage device

1 shows a collecting device 5 according to the invention with cover 30 and spray head 22 with outlet openings 23. The drainage tube 4 leads via an inlet 11 to the spray head 22. In the collecting device 5 there is a loose bed of liquid-absorbing substances. The drainage device is operated via a vacuum pump 6 and a connected vacuum line 25, which is connected to the collecting device 5 via an outlet 12. To the suction line also a bacterial filter 40 is connected upstream. Fig. 2 shows the same structure as in Fig. 1, but in the collecting device 5, an inner lining of an immobilized liquid-absorbent insert 16 is arranged.

Fig. 3 shows the same structure as in Figs. 1 and 2, but in the collecting device 5 more immobilized liquid-absorbing deposits 16 are arranged, which are each covered with a film 17. FIG. 4 a shows a collecting device 5 with an inner container 15 and a liquid-absorbing layer 16.

Fig. 4b shows the removal of the inner container 15 from the collecting device 5 with a liquid-absorbing layer 16 in the used state.

FIG. 5 shows a collecting device 5 according to the invention with a cover 30 and a bottle-shaped spray head 22. FIG. 5 shows a collecting device 5 according to the invention with a bottle-shaped spray head 22. The drainage tube 4 leads via an inlet 11 to the spray head 22. In the collecting device 5 is an inner lining of an immobilized liquid-absorbent insert 16. The drainage device via a vacuum pump 6 and a connected vacuum line 25, which is connected via an outlet 12 with the Sammelvorrich- device 5 operated. To the suction line also a bacterial filter 40 is connected upstream.

Fig. 6 shows a collecting device 5 according to the invention with a pivotable lid 30 and a spray head 22 with an inner lining of an immobilized liquid-absorbing insert 16. The lid is also lockable in an inclined position to remove the spray head 22 from the lid 30 and the consumed To be able to pull inner container out of the pot.

FIG. 7 b shows the removal of the bag-shaped inner container 15 from the collecting device 5. FIG. 8 shows a spiral-shaped spray head 22 with outlet openings 23. FIG. 9 shows a helical spray head 22 with outlet openings 23.

10 shows a collecting device 5 with a distributor 50 and the opening drainage hose 4.

FIG. 11 shows the installation situation of the collecting device 5 with respect to the entire drainage device 100 shown in FIG. 14. The drainage tube 4 leads via a flow sensor 7 and a hose connector 8 to the spray head 22 between the flow sensor 7 and the Hose connector 8 is arranged a removal point 18 in the form of a test cock. The test cock can be replaced by an elastomeric membrane (not shown) built into the drainage tube 4 which, after removal of the wound exudate, contracts with the aid of a medical syringe and seals the resulting hole. The spray head 22 has a base 9, on which a central opening 13 is arranged, which in turn is followed by a pipe section 32 projecting outwardly beyond a bottom 14 of the collector device. On the pipe section 32, in the immediate vicinity of the bottom 14, a shut-off valve 34 is installed. The pipe section 32 continues via an additional shut-off valve 21 (safety valve) and a suction line 20 to a remote-controlled three-way valve 24, to which also vacuum lines 25 and 26 are connected. The one vacuum line 25 connects the collecting device 5 with the three-way valve 24 and the other vacuum line 26, the vacuum pump 6 with the three-way valve 24. On the guided to the vacuum pump 6 vacuum line 26 is (optionally) a check valve 27. The drainage device is operated by the control unit 43 to which also the vacuum pump 6 and the accumulator 28 are connected. FIG. 12 shows the installation situation of the collecting device 5 with respect to the entire drainage device 100 shown in FIG. 14 with different supply units 31 (alternating current connection) and 35 (direct current connection). This allows the vacuum pump to be connected to a 230 V AC power supply or to a 12 V socket as required. In addition, a solar element 36 and at least one interchangeable, rechargeable accumulator 28 is provided, the state of charge can be controlled by a display 29 (LED lamp and / or acoustic signal). The collection device 5 is additionally preceded by a control module 41, which is composed of a flow sensor 7, 37 and an optoelectronic element, eg a laser transmitter or a microcamera 44, which is directed onto a glass-transparent luminescent screen 45 arranged on the drainage tube 4. The extracted wound exudate is continuously scanned by the microcamera 44 and analyzed by the control module 41. This in turn allows the assessment of the healing process based on comparison with reference data. The changes in the exudate parameters registered by the control module 41 are also received by the control unit 43, which can change the operating parameters accordingly.

The data is passed on to a CPU unit (chip), which u. a. has the reference data and which is locked to the control unit 43. The control unit 43 is equipped with an LCD display 42. The control unit 43 connected to the control module 41 can supply different data. These include, among other things, the consistency of the wound exudate, the color, cytological information, etc. The control module 41 can also determine whether MRSA, germs, etc. are present and alert accordingly. The vibration module 46 may be used in place of the shredding device 48. Such piezoelectric modules are known and belong to the prior art.

FIG. 13 a shows a collecting device 5 with a cover 30 and spray head 22 integrated in the cover. Fig. 13b shows the lid 30 with the spray head 22 and the outlet openings 23 in plan view.

Fig. 14 shows the device 100 according to the invention in its entirety. The wound dressing 1, which optionally comprises an absorbent body, is applied tightly around the wound on the skin of the patient. In operation, the device 100 is connected to the power supply via the AC terminal 36. The check valves 38, 34, 21 and the check valve 27 are open. The vacuum line 25 is closed by the three-way valve 24 and the vent valve 39 on the lid of the collector as well. The distance from the suction head 2 to the three-way valve 24 is filled with air at atmospheric pressure. By pressing the ON button on the housing of the vacuum pump 6 whose drive is started. The air is strongly drawn in via the start suction line 20 (about 170 mm Hg), causing the wound exudate to begin to flow. The wound exudate reaches the flow sensor 7 which sends a signal to a control unit 43 which first closes the shut-off valves 34, 21 and turns the three-way valve 24 so that the start suction line 20 can no longer suck in air. The wound exudate flows into the spray head 22 due to inertia and the existing pressure differential. Meanwhile, the vacuum line 25 is released and the vacuum pump 6 begins to operate at a second, lower level (about 85 mm Hg). The wound exudate flows via the openings 23 of the spray head 22 into the interior of the collecting device 5 and wets the inner lining 16 located therein, which also contains superabsorber particles. When a certain amount of exudate has been registered by the flow sensor 7, the latter sends a signal to the control unit 43, which in turn closes the shut-off valve 38 located on the drainage hose 4. Fig. 15a shows a shredding device 48 for installation in a drainage tube in the vertical section. Fig. 15b shows a shredding device 48 for installation in a drainage tube in cross section. It can be seen that cutting edges 49 protrude into the lumen of the drainage hose. FIG. 15c shows the installation of a shredding device 48 in FIG a drainage tube 4. It can be seen that the blades 49 cause blood clot and other particulate components (pus plaques, biofilm particles, etc.) of the aspirated exudate are crushed. Figs. 16 and 17 show further embodiments of a stationary vacuum pump. The first, installed on the drainage tube 4 three-way valve 24 is placed in position "free" for the vacuum line and in position "closed" for the spray head 22. The second, located on the vacuum line three-way valve 24 (Fig. 16) or the control valve 38 (Fig. 17) is closed for the short vacuum line, at the lower end of the bacterial filter 40, also closed. In this setting, the ON button on the vacuum pump 6 is operated. The air is strongly drawn, causing the wound exudate to flow and reaches the flow sensor 7, which at this moment sends a signal to the control unit 43, the first three-way valve 24 in the "free" position and the second three-way valve 24 in the position Surrounded "closed" for the wound exudate. The function of the vacuum pump 6 is to start the device. The vacuum pump 6 thus constitutes a "starter." In addition, the control unit 43 includes a smaller pump 61 inserted on the drainage tube 4, which functions as a continuous suction of wound exudate Collection device 5 is still a vent 39 is provided.

The wound exudate flows via the openings 23 of the spray head 22 into the interior of the collecting device 5 and wets the inner lining 16 contained therein containing SAP.

When a predetermined amount of exudate is registered by the flow sensor 7 or flow meter 37, it sends a signal to the control unit 43, which in turn closes the shut-off valve 38 located on the drainage tube 4 and at the same time switches off the pump 61. Fig. 18 shows a mobile vacuum pump as may be used in the context of the drainage device according to the invention. The vacuum pump has a control module 51 and a pump module 52. The control module may have a touchscreen 53, while the pump module may have a battery compartment 54, a pump 55 and a removable collection device 56. Said collection device may be lined, for example, with superabsorbent polymers. The drainage tube 57 is shown shortened. The touchscreen can be designed to be push-up - similar to a mobile phone with slide function - to make hidden hidden controls or open the battery compartment.

19 shows the mobile vacuum pump in the side view with the push-up screen 53 and the pump 55. It can also be seen that the collecting device 56 can be designed to be removable upwards. In this case, the collecting device can be designed via a valve so that it is automatically connected to the drainage tube during insertion.

Fig. 20 shows an alternative embodiment of a mobile vacuum pump as may be used in the context of the device according to the invention. Here, the touch screen 53 is in the form of a folding display - similar to a mobile phone with folding display designed - to make concealed controls accessible underneath or to open the battery compartment. Again, the collection device may be lined with superabsorbent polymers. Furthermore, the mobile vacuum pump has a fastening strap 58, with which the pump can be fastened, for example, in an inconspicuous form on the leg of a patient. For this purpose, the mobile vacuum pump may also be anatomically designed, ie adapted, for example, to the shape of the leg of a patient. The latter two points can also be used in the vacuum pump according to FIGS. 18 and 19 be realized. FIG. 21 shows an alternative embodiment of a mobile vacuum pump, which in this case has the form of a bellows 59. Said bellows may for example be lined with superabsorbent polymers. Furthermore, this embodiment has a valve 60, by means of which a negative pressure on the drainage tube 57 can be applied.

TRIES

Preparation of a liquid-absorbent insert for use in the collecting device according to the invention:

1. A dispersion of carboxymethyl cellulose and boiled and cooled tap water is mixed with a certain amount of glycerol and mixed homogeneously. The glycerol also acts bacteriostatic and fungistatic. The solution is evenly distributed to the bottom of a flat container. Thereafter, an amount of powdery SAP is sprinkled on the surface of the solution. The resulting cake is then baked at a temperature of about 100 ° C in the kitchen stove for 90 min.

After cooling, the surface is drizzled with glycerol and water. This is followed by renewed heating to 120 ° C. (3 min) and subsequent cooling to ambient temperature.

The white-colored flat structure holds other aids such as glue together and is flexible. 2. The experiment was repeated without subsequent application of glycerol but with TiO ₂ . The titanium dioxide in certain circumstances disinfects and is also inert. Components / Experiment No. 1: Components / Experiment No. 2: Water 40 grams of water 40 grams

SAP 18 grams of SAP 18 grams

CMC 2 grams CMC 3 grams

Glycerol 10 grams of glycerol 18 grams of collagen powder ₂ grams of Ti0 ₂ 2 grams

Collagen powder 2 grams

Claims

claims

A collection device for use in a drainage device for wound treatment using negative pressure, said collection device (5) being wholly or partially provided with at least one fluid-absorbent polymer-containing insert (16).

2. Collection device according to claim 1, wherein the liquid-absorbent insert

(16) comprises a foam, a textile material and / or a homogeneous non-textile polymeric material.

3. Collection device according to claim 1 or 2, wherein the liquid-absorbent insert (16) is at least partially enveloped by a liquid-permeable film (17) and rests flat on this.

4. Collection device according to one of claims 1 to 3, wherein between the liquid-absorbent insert (16) and the collecting device (5), a removable inner container (15), preferably a bag, is arranged.

5. collecting device according to one of claims 1 to 4, wherein the collecting device (5) and / or the inner container (15) is a disposable container.

6. Collection device according to one of claims 1 to 5, wherein the liquid-absorbent insert (16) with the inner wall (19) of the collecting device (5) or the inner wall of the inner container (15) connected, preferably glued, is, or loosely rests on it.

7. collecting device according to one of claims 1 to 6, wherein in the collecting device (5) from holding means are arranged, which counteract the expansion of the liquid keitsabsorbierenden insert (16) in the direction of the container center.

8. Collection device according to one of claims 1 to 7, wherein within the collecting device (5) at least one of the inlet (1 1) connected to the spray head (22) with one or more outlet openings (23) is arranged.

9. Collection device according to claim 8, wherein the spray head (22) is pivotable and / or rotatable.

10. Collection device according to claim 8 or 9, wherein the spray head (22) has a cylindrical, spherical, spiral, conical, bottle or screw shape.

11. Collection device according to one of the preceding claims, wherein the maximum

Expansibility of the insert in the wetted state is adapted to the internal volume of the collecting device.

12. Analysis device for the examination of absorbed by the body's own exudates on physiological and / or pathological parameters.

An analysis apparatus according to claim 12, wherein said suction is generated by a) applying atmospheric negative pressure and / or

b) by superabsorbent polymers mediated suction.

The analyzer of any of claims 12-13, wherein said analyzer includes at least one device selected from the group consisting of • Dropper or weighing device to determine the amount of wound exudates transferred to the collection device

• Removal device for taking fresh exudate

• pH meter, oxygen probe, germ detector, hemoglobin sensor and / or protein sensor

• Test strips

• biochip

• microphotometers, and / or

• Immunoassays

having.

15. Wound dressing comprising at least one area containing superabsorbent polymers and also an analysis device according to one of claims 12-14.

16. A drainage device for wound treatment using negative pressure, comprising a collecting device and / or an analysis unit according to one of the preceding claims and

a gastight wound covering element (1),

a suction head (3),

at least one drainage tube (4), as well

optionally a vacuum source (6).

17. A drainage device according to claim 16, wherein said vacuum source is selected from the group comprising

a) Electrically operated vacuum pump

b) Hand operated vacuum source, and / or

c) evacuated vacuum vessel.