CZ2001497A3 - Apparatus for treating wounds - Google Patents

Abstract

Wound care device (10) includes bandage (12) adapted to cover the wound (16) and seal the wound (16) around the periphery, the bandage (12) being above the wound (16) a cavity is formed which communicates with the liquid supply and with drainage for drainage. It is in the fluid supply a nebulizer (26) and a liquid drug pump. In drainage for Liquid extraction is by suction pump and bandage (12) it creates a relatively sealed space above the wound (16) maintaining vacuum.

Description

Technical field

The present invention relates to a wound care device. In particular, the invention relates to a device for the treatment of surface wounds.

BACKGROUND OF THE INVENTION

Professional healthcare professionals, such as nurses and doctors, routinely treat patients with superficial wounds of various sizes, shapes and severity. The conditions and parameters of the treatment are determined by the type of wound and the patient's indications by which the medication is selected, for example, the use of antibiotics, growth factors, enzymes, insulin, anesthetics and the like. The nature of the wound then determines the treatment regimen, for example, the dose size of the drugs and the temperature control.

It is known in the art that the wound healing process can be improved by regulating the atmosphere around the wound, for example by adjusting the oxygen and / or moisture content, or if the treatment regimen involves the supply of pressurized oxygen, or by administering drugs near the wound surface. Examples can be found in Madalene C.Y. Heng, Topical Hyperbaric Therapy for Skin Wounds Problem, 19 J. DERMATOL. SURG. ONCOL. 784 (1993); Theodor Kaufman, M.D., et al., The Mlcroclimate Chamber: The Effect of Continous Topical Administration of 96% Oxygen and 75% Relative Humidity on Healing Rate of Experimental Deep Burns, 23 J. TRAUM 807 (1983); and U.S. Pat. Patent No. 4,969,881 to Viesturs entitled Disposable Hyperbaric Oxygen Dressing. Manufacturers of medical devices would welcome a practical surface wound treatment system that would allow healthcare professionals to flexibly regulate the surface atmosphere around the wound, including the application of medicines in the form of aerosol and atmosphere additives such as oxygen. Furthermore, it is also desirable to discharge the effluent from the wound site.

It has been known from several publications that wound dressings or wound dressings have been used in surgery for many years to form an enclosed space above the wound for healing healing. A method of such wound treatment is described in U.S. Patent Nos. 5,645, 081 and 5,636,643 without cited publications.

A conventional treatment of superficial wounds involves the application of a dressing material such as cotton gauze directly to the wound of the patient. It is usually necessary to change this dressing material frequently because it has been saturated with a wound discharge. The frequency of dressing material exchange may be increased if liquid drugs such as saline, peroxide, surface antibiotics or other drugs are applied to the dressing at the same time according to the treatment regimen of the various types of wounds.

Replacing wound dressings causes a number of potential problems for healthcare professionals. Direct contact with sensitive tissue in and near the wound can be extremely uncomfortable for the patient and can cause additional trauma. Exposing the wound to the atmosphere may increase the likelihood of infection. The dressings are usually held in place by adhesives so that changing the dressing involves removing the adhesive tape from the patient's skin, which can be painful and traumatic to the patient, especially if it is necrotic tissue. In addition, the dressing material can bind to tissue within the wound, so that changing the dressing can cause tissue loss from the wound, which is associated with pain for the patient and also slows the healing process.

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SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a bandage system that allows sanitary collection and removal of material released from the wound during the treatment and healing process and reduces the need for removal of wound contacting material.

SUMMARY OF THE INVENTION

The problem is solved and the drawbacks of known solutions of this kind are largely eliminated by a wound treatment device comprising a bandage adapted to cover the wound and sealing the wound around its periphery, wherein a cavity is formed in the bandage above the wound. drainage of liquid.

Advantageously, an atomizer as well as a pump for liquid medicament are provided in the liquid supply.

Preferably, a suction pump is provided in the fluid drainage and the bandage forms a relatively sealed space above the wound to maintain the vacuum.

Preferably, a temperature-controlled fluid recirculation tube is attached to the bandage.

Preferably, the apparatus further comprises a heater and a heat exchanger arranged in the temperature-controlled liquid recirculation tube.

Preferably, the apparatus further comprises a temperature sensor which is connected to a temperature-controlled liquid recirculation tube.

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Preferably, the apparatus further comprises a control circuit and a shut-off valve, the control circuit being connected to a temperature sensor and a shut-off valve which is arranged in the liquid supply line, the control circuit being adapted to activate the shut-off valve based on the temperature sensor signal.

Further preferably, an oxygen supply is connected to the liquid supply.

Preferably, the apparatus further comprises an oxygen inlet, an air inlet and a valve system, the first inlet of which is connected to the oxygen inlet, the second inlet of the air inlet, and the outlet of the liquid medicament inlet.

The valve system may be a two-port selection valve.

Preferably, the apparatus further comprises a pressure sensor which communicates with the fluid supply line.

Preferably, the apparatus further comprises a pressure sensor communicating with the fluid supply line and a control circuit coupled to the pressure sensor and the display, the control circuit being adapted to display display data based on the data obtained by the control circuit from the pressure sensor.

Preferably, the apparatus further comprises a control circuit coupled to the pressure sensor and adapted to generate an alarm signal when the reading obtained by the control circuit from the pressure sensor exceeds a predetermined threshold.

Preferably, the apparatus further comprises a basket adapted for insertion

between the bandage and the skin surface around the wound.

The bandage is preferably two-part and consists of a feed bandage adapted to seal the wound and comprising said cavity and a drainage bandage adapted to be coupled to the feed bandage.

Preferably, the bandage is provided with a fluid supply conduit which is arranged to deliver liquid to the wound at the wound, and a fluid drainage conduit provided with at least one liquid collecting opening and arranged around the wound.

The liquid supply line is preferably provided with a funnel-like extension.

The bandage covers the fluid supply and fluid drainage lines and forms a closed space above and around the wound.

It is further preferred that the device further comprises a sensor connected to the atomiser and adapted to signal the amount of liquid within the atomiser.

Said sensor may comprise an acoustic sensor.

Preferably, the apparatus further comprises a control circuit connected to the sensor and adapted based on the data obtained by the control circuit from the sensor to determine whether the liquid reservoir of the dispenser contains liquid.

It is further preferred that the apparatus further comprises an electronic control system coupled to the nebulizer for controlling the output of the nebulizer.

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The present invention also provides a wound treatment device comprising:

a first bandage adapted to cover the wound, the first bandage having a first surface adapted to face the wound, at least one liquid inlet passage formed in the first surface and at least one fluid drainage passage formed in the first surface;

a fluid supply line communicating with the fluid supply passage;

a second bandage adapted to couple to the first bandage, wherein the second bandage has a second surface adapted to face the first bandage and create a fluid space between the surfaces; and a fluid drainage pipe connected to the fluid drainage passage.

The at least one liquid feed passage preferably comprises a plurality of feed passages which are arranged substantially in a circle.

Preferably, the device further comprises a drainage liquid container connected to the liquid drain line and a filter connected to the drainage liquid container.

Preferably, the first bandage comprises a first resilient and relatively impermeable layer forming a first surface and the second bandage comprises a second resilient and relatively impermeable layer forming a second surface, wherein in the second bandage a closed space maintained under negative pressure is formed over the wound.

Preferably, the device further comprises a basket adapted to be inserted between the bandage and the periphery of the healthy tissue surrounding the wound and forming a relatively tightly sealed space above the wound, maintained under vacuum.

Preferably, the fluid space is divided into a first chamber and a second chamber, the first chamber being formed around the liquid inlet passage and the second chamber being formed around the drainage liquid passage.

The fluid supply line is connected to the first chamber and the drainage fluid passage is connected to the second chamber.

The present invention also provides a wound treatment device comprising:

a bandage with a wound facing surface and a fluid drainage passageway with an aperture near the wound facing surface;

a fluid drainage pipe connected to a fluid drainage passage;

first and second drainage fluid containers connected to a liquid drainage line; and a first and a second valve positioned between the fluid drainage conduit and the first and second drainage fluid reservoirs.

The valves are preferably push-buttons.

Preferably, the device further comprises a sensor connected to the first drained liquid container to indicate the amount of liquid in the first drained liquid container.

The present invention further provides a wound treatment device comprising:

a cover band adapted to cover the wound and sealing on healthy tissue around the periphery of the wound, the cover band forming a relatively closed, vacuum maintained space around the wound;

a fluid supply conduit arranged between the cover bandage and the healthy skin of the tissue near the wound; and a drainage conduit with at least one drainage fluid opening disposed between the cover bandage and the healthy skin of the tissue adjacent the wound and the intake conduit.

The liquid supply line is preferably connected to the liquid medicament supply.

Preferably, the device further comprises a drainage fluid reservoir communicating with the liquid supply line and a vacuum source.

The drainage pipe is preferably formed by a flexible hose running along the length of the drainage pipe.

The present invention further provides a wound treatment device comprising:

a cover band sealing around the wound and forming a relatively closed, vacuum maintained cavity over the wound, the cover band having a first surface adapted to face the wound through which at least one liquid inlet passage and at least one drainage passage passes, and a second surface facing the wound a first surface and defining a fluid space therebetween, which is divided into a first chamber and a second chamber, the first chamber being formed around the liquid inlet passage and the second chamber being formed around the drainage passage;

the liquid supply line communicates with the first chamber and the liquid supply passage; and a drainage pipe with at least one drainage fluid opening is connected to the second chamber and the drainage passage.

444444 44 44 44

4 · 4 4 4 4 4 4 4

4 4 · 444

4,444 4444 44,444

Said drainage pipe is preferably arranged inside the first chamber.

Finally, the present invention also provides a wound treatment device comprising:

a cover band sealing around the wound and forming a cavity above the wound to the joint, the dimensions of which are adapted to the joint and in which vacuum is maintained, the cover band having a first surface adapted to face the wound through which at least one liquid inlet passage and at least one a drainage passage, and a second surface facing the first surface and defining a liquid space therebetween;

the liquid supply line communicates with the liquid space and the liquid supply passage; and a drainage pipe with at least one drainage fluid opening is connected to the cavity.

Preferably, the device further comprises a heater and a temperature sensor connected to the cover bandage.

Finally, it is also advantageous if the apparatus further comprises a heater and a temperature sensor connected to the cover bandage and to the sprayer.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS The invention is further elucidated with reference to the accompanying drawings, in which: FIG

FIG. 1 is a perspective view of a wound treatment device according to the invention;

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Figure 2 is a block diagram of a wound treatment device according to the invention;

FIG. 3 is a block diagram of an alternative embodiment of a wound treatment device according to the invention;

Fig. 4 is an exploded perspective view of a two-piece bandage device according to the invention;

Fig. 5 is a plan view of the lower layer of the drug delivery bandage device of Fig. 4;

FIG. 6 is a plan view of the topsheet of the drug delivery bandage device of FIG. 4;

Fig. 7 is a plan view of the liquid medicament supply line and the temperature-controlled liquid recirculation line of Fig. 4; Fig. 8 is a plan view of the liquid medicament supply line and the temperature-controlled liquid recirculation line of Fig. 7;

Fig. 9 is a cross-sectional view taken along line 9-9 of Fig. 1;

FIG. 10 is a fragmentary plan view of the bandage device of FIG. 1;

FIG. 11 is an exploded perspective view of an alternative embodiment of a bandage device;

000090 00 90 90 • 9 9 0999 909 exploded perspective view of another alternative embodiment of a bandage device;

0 9 0 9 0 ···· ·

099 98 «900

9 09 9990 90 909 in Fig. 12 in Fig. 13 an exploded perspective view of another alternative embodiment of a bandage device;

FIG. 14 is an exploded perspective view of an alternative embodiment of a drainage bandage;

FIG. 15 is a schematic perspective view of an alternative embodiment of a wound treatment device;

Fig. 16 is a plan view of the recirculation assembly of the heating device of Fig. 15;

FIG. 17 is a perspective view of the recirculation system of FIG. 16;

FIG. 18 is an exploded perspective view of the radiator heating plate of the heating device of FIG. 15;

FIG. 19 is a block diagram of an alternative embodiment of a drainage system;

FIG. 20 is an exploded perspective view of a wound treatment device and a liquid drug delivery system in an alternative embodiment of the device of the invention;

Fig. 21 is a plan view of the wound care device of Fig. 20;

Fig. 22 is a cross-sectional view of the circulation tube of the wound care device in the plane A-A of Fig. 20;

FIG. 23 is a plan view of another embodiment of the wound care device of the present invention;

Fig. 24 is a cross-sectional view of the wound treatment device in plane B-B of Fig. 23;

FIG. 25 is a plan view of another embodiment of the wound care device of the present invention;

FIG. 26 is a cross-sectional view taken along line C-C of FIG. 25;

FIG. 27 is a plan view of yet another embodiment of the wound care device of the present invention;

Fig. 28 is a cross-sectional view of the wound treatment device in the plane D-D of Fig. 27;

Fig. 29 is a cross-sectional view of the wound treatment device in the plane E-E of Fig. 27;

Fig. 30 is a plan view of a flexible wound treatment device according to the invention;

Fig. 31 is a cross-sectional view of the flexible wound treatment device in the plane F-F of Fig. 30;

Fig. 32 is a cross-sectional view of the flexible wound treatment device of Fig. 30 applied to a wound on the flexible joint;

a perspective view of a wound treatment device comprising a heating system; and • 4 lt 44 44 44 44 44

444 444 44

4 4 4444 44

- in FIG. 33

FIG. 34 is a perspective view of a portion of the wound care device of FIG. 33.

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DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 1, a wound treatment device 10 is shown comprising a bandage device 12 applied to a patient ' s skin 14 near a surface wound 16. The wound treatment device 10 includes a wound temperature control system 17, a wound drainage system 19 and a wound 16; a medical fluid supply system 15 comprising a nebulizer 26. The wound care device 10 thus constitutes a system for controlling the surface temperature in the vicinity of the wound 16, including the drug delivery, the control of atmospheric conditions, the temperature control and the discharge of the wound effluent 16.

The incorporation of the nebulizer 26 of FIGS. 2 and 3 into the wound care device 10 allows the wound 16 to be supplied with a nebulized liquid containing dissolved wound care substances 16, for example oxygen or medicaments. When the wound 16 is healing, a layer of liquid is formed on its outer surface. This layer of liquid forms a barrier that hinders the access of atmospheric components, such as oxygen or drug substances, to the cells in the wound, since these components must diffuse through this layer of liquid. Application of the atomized liquid improves treatment and promotes healing, since the atomized liquid can be more easily mixed with the liquid layer. This allows the components dissolved in the atomized liquid to diffuse more easily through the liquid layer and to be absorbed in the cells below the liquid layer. Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

- 14 liquids.

The bandage device 12 is of two parts and consists of a bandage 18 for supplying a liquid medicament and a bandage 20 for receiving the spout. This discharge receiving bandage 20 is designed to be detachably connected to the liquid drug delivery bandage 18 as shown, for example, in FIGS. 2 and 3. The liquid drug delivery bandage 18 serves to isolate the wound environment from the surrounding atmosphere, so that the system The medical fluid delivery system 15, the wound temperature control system 17, and the wound drainage system 19 can control the environment around the wound 16. The use of the two-piece, removable construction of the bandage device 12 allows the discharge bandage 20 to be replaced without the need remove the liquid medicament bandage 18 from the patient's skin 14.

The liquid drug delivery bandage 18 includes a liquid drug delivery conduit 22 and is applied to the skin 14 of the patient on the wound 16. The liquid drug delivery bandage 18 may remain in place and the effluent receiving bandage 20 may be replaced during treatment as necessary. The spout 20 comprises a wound discharge conduit 24 which is connected to the wound through the liquid medicament delivery bandage 18, thereby allowing the wound 16 to be discharged from the bandage device 12. The liquid comprises both wound 16, as well as the liquid that is fed to the liquid drug delivery bandage 18 through the liquid drug delivery line 22. Thus, the bandage device 12 allows the regulation of the atmosphere at the surface of the wound 16 and suppresses the access of the polluted atmosphere to the wound 16, thus improving healing and reducing the potential for infection and trauma.

System 15 for supplying medical fluid to the device 10 for

In the exemplary embodiment, the wound treatment 16 comprises a nebulizer 26 and optionally a medical fluid pump 39 as shown in FIGS. 2 and 3. The temperature control system 17 comprises a heater 40 and a pump 42. The drainage system 19 comprises a drainage bag 92 shown in Fig. 2 or alternatively an aspiration pump 98 and a liquid bottle 96 as shown in Fig. 3.

The atomiser 26 is provided with a spray gas inlet 28, for example, normal air or pure oxygen, a spray liquid medicament outlet 30, and finally a liquid medicament cartridge 32, which is disposed between the spray gas inlet 28 and the spray liquid medicament outlet 30. The cartridge 32 contains the liquid medicament needed to supplement the therapy of the wound 16, for example, antibiotics, growth factors, enzymes, hormones, insulin, anesthetics and the like. It is understood that the container 32 may contain any liquid, for example, pure water or saline. The present nebulizer 26 may be of the Mini Heart type from Vortran, which can atomize about 4 mm of liquid drug per hour using a nebulizer gas of about 1.5 liters per minute. However, it will be understood that any suitable nebulizer may be used.

The atomized liquid medicament outlet 30 from the atomizer 26 is connected to the liquid medicament supply line 22 of the bandage 18 for the liquid medicament supply of the bandage device 12. Optionally, a liquid pump 39 may be included in the liquid medicament supply line 22, such as a type IV pump. Thus, the wound care device 10 provides for the delivery of either aerosol or liquid medicament, or both, to the wound 16 through the liquid medicament bandage 18.

As discussed in more detail below, the bandage 18 comprises

The liquid medicament supply further comprises a recirculating fluid conduit 34 with an inlet 36 and an outlet 38. The wound care device 10 comprises a heater 40 and a peristaltic pump 42 interposed between the inlet 36 and an outlet 38 of the recirculating fluid conduit 34. for the temperature controlled liquid to flow through the bandage device 12, thereby regulating the temperature around the wound 16.

The peristaltic pump 42 is an example of Model 313 type from Watson Marlow and has a nominal flow rate of between 200 to 250 millimeters per minute. Although a peristaltic pump 42 powered by a synchronous 72-rpm AC motor is used because its replacement tubing eliminates the need to clean the pump 42 for use in another patient, it is understood that another type of pump, for example a centrifugal, toothed or membrane.

In the exemplary embodiment, the heater 40 consists of a specially designed tubular unit consisting of a tubular sheath 37 in which a 100 W heater 35 and a thermocouple 33 for monitoring the temperature of the heater 35 are arranged. The liquid reservoir 41 is tightly housed inside the sheath 37 so that the heating element 35 can heat the recirculated liquid. As discussed below, other suitable heating systems may also be used.

In the exemplary embodiment, the liquid container 41 is formed of a silicone rubber tube that fits snugly into the housing 37. The liquid container 41 is preferably designed as a unit supplied with the bandage device 12 and connected to its ducts to prevent splashing thereof, that could occur if an open container was used for the recirculated liquid. However, it is understood that for temperature control

Other suitable equipment, such as a submersible heating element located in an open liquid container (not shown) or an alternative heating device 200, shown in Figures 14-18, may be used in recirculated media and will be described in more detail below.

The wound care device 10 further comprises a computer-based electronic control system 44 which is electronically connected to electronics and electromechanical elements such as a sprayer 26, a peristaltic pump 42, a heater 40 and a thermocouple 33. This electronic control system 44 provides automatic control of the device 10 for treating wounds 16 in various treatment regimes, for example, to control the temperature at the wound site 16 by means of a heater 40 and a peristaltic pump 42 to maintain the temperature of the recirculating liquid at 37 ° C.

In the exemplary embodiment, the electronic control system 44 is coupled to the controlled elements directly using analog, discrete, and serial I / O signals as required by the interface of the individual elements. It is understood that the communication mechanism may comprise any type of electronic network with a serial or parallel bus architecture. Similarly, the communication protocol may be different. For example, a master-slave, a token ring, or a peer-to-peer communication protocol such as Ethernet or Echelon LONworks ™ may be used. Using control software for elements of wound care device 10, such as nebulizer 26, heater 40, and peristaltic pump 42, electronic control system 44 can automatically regulate the delivery of the liquid drug or aerosol thereof, the temperature and oxygen concentration at the wound site 16, and the chosen treatment regime and the optimal environment for healing this wound 16.

The atomising gas inlet 28 of the atomiser 26 is connected to a atomising gas source 46 that has an oxygen inlet 48 and an air inlet 50 and includes an air compressor 52, an air pressure regulator 54, an oxygen pressure regulator 56, a selection valve 58 and an outlet. a gas filter 60, which in the embodiment is a disposable bacterial filter.

The oxygen inlet 48 may, according to an exemplary embodiment, be connected via a standard hospital air filter and water scavenging bath 64 to a standard hospital oxygen mixer 62. This oxygen mixer 62 may be replaced by an internal source of oxygen pressure (not shown). The air filter and the water scavenging bath 64 comprises a filter element for trapping particles larger than 5 µm and a scavenging bath for trapping solids and condensed water from the oxygen mixer 62, which is further provided with an oxygen flow meter 66 in the exemplary embodiment, e.g. , which allows the oxygen flow to be set, for example, in the range of zero to three liters per minute.

The air compressor 52 is connected to the atomising gas inlet 28 of the atomizer 26 via an external air filter and a sorbent bath 68. As with oxygen, an external compressed air source (not shown) may also be used. In the exemplary embodiment, the air compressor 52 is a diaphragm pump driven by a brushless DC motor that can deliver at least 1.3 liters per minute at 15 psi. The air compressor 52 is provided with an inlet filter (not shown) trapping particles larger than 25 µm and combined with a silencer. Similar to the oxygen filter 64, it contains:

- 19 air filter and sorbent 68 a filter element trapping particles larger than 5 µm and a sorbent to retain solids and water droplets from the compressed air outlet from the air compressor 52. The air and oxygen inlets 48, 50 are connected to the select valve 58 via air or oxygen pressure regulators 54, 56. The pressure regulators 54, 56 maintain air and oxygen pressures between about 15 and about 17 psi. The air pressure regulator 54 relieves the excess pressure from the wound treatment device 16 through the air outlet 70, while the excess oxygen from the oxygen pressure regulator 56 is relieved by the oxygen outlet 72.

The selection valve 58 is electronically coupled to the electronic control system 44, allowing software control of the mixing of air with oxygen, so that the composition of the inlet gas for the atomizer 26 can vary from pure air to pure oxygen. This selection valve 58 can replace the need for an external oxygen mixing device 62. For example, the selection valve 58 switches between oxygen and air in a certain ratio.

However, other types of valves may be used to mix air with oxygen, such as a two-port mixing valve, a pair of throttle valves, or another valve design that is useful for mixing two inlet media. The electronic control system can be used to automatically supply the air-oxygen mixture to the wound site 16 according to the selected mode. For example, the electronic control system 44 may be equipped with a program according to which air is delivered to wound 16 for three hours, followed by oxygen supply for three hours, and so on. The selection valve 58 switches automatically according to this program.

The atomizing gas source 46 further comprises a pressure sensor 68

- an air pressure sensor 20 between the selection valve 58 and the air pressure regulator 54, an oxygen pressure sensor 74 that is connected between the selection valve 58 and the oxygen pressure regulator 56, and a atomizing gas pressure sensor 76 that is included between the selection valve 58, and The spray gas inlet 28 to the sprayer 26. The sensors 72, 74, 76 are coupled to the electronic control system 44, providing feedback to check the correct operation of the system so that the alarm can be triggered and the wound care device 16 is automatically disconnected. if the pressure signal exceeds a predetermined threshold.

The wound care device 10 also includes a level sensor 78 in the atomiser 26 which signals that the atomizer 26 is empty. The level sensor 78 in the atomiser 26 sends a feedback signal to the electronic control system 44 and may be formed, for example, by a sound reflection sensor. The electronic control system 44 continuously monitors the output signal from the level sensor 78, which changes markedly when the liquid medicament cartridge 32 is emptied, which is when the alarm can be triggered and the wound care device 16 can be disconnected. It will be understood that other types of sensors may also be used to detect the emptiness of the atomizer 26, such as a capacitive sensor, a float sensor, an optical sensor, an infrared sensor or ultrasonic sensors.

The wound care device 10 further comprises a atomizing gas pressure sensor 80 that is interposed between the selection valve 58 and the atomising gas inlet 28 to the atomiser 26. This atomizing gas pressure sensor 80 generates a feedback signal for the electronic control system 44 which indicates the pressure inside. and it is also used to verify the proper operation of the selection valve 58. The wound care device 10 furthermore.

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it comprises a tilt sensor 82 and a bandage pressure sensor 84, both of which are connected to the electronic control system 44. The tilt sensor 82 triggers an alarm and turns off the wound treatment device 10 when the wound treatment device 10 is tilted more than e.g. 30 °.

The bandage pressure sensor 84 is included between the sprayer outlet 30 and the liquid drug delivery line 22 of the bandage device 12. The bandage pressure sensor 84 by monitoring the back pressure in the bandage device 12 allows the electronic control system 44 to indicate the pressure inside the bandage device 12 or between the patient and the bed if the patient lies directly on the bandage device 12. Thus, the electronic control system 44 can trigger an alarm and turn off the wound care device 16 when the pressure in the bandage device 12 exceeds a certain limit.

The pressure on the wound 16 may cause further skin rupture, especially if it is a ulcer decubitus 16 or a pressure sores. The signal from the bandage pressure sensor 84 can be used as a feedback signal for bed control or bed surface control to set optimal conditions. Thus, the signal from the bandage pressure sensor 84 can inform the peroneal, which can then move the patient onto an existing mattress or a reduced carrier pressure mattress to optimize conditions.

The temperature control system 17 consists of a heater 40, a liquid reservoir 41 and a pump 42. The liquid reservoir 41 is provided with an inlet 43 which communicates with the outlet 38 of the recirculating fluid line 34 and an outlet 45 which communicates with the line supplying the peristaltic pump. 42.

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The peristaltic pump 42 is provided with an inlet 47 that communicates with the outlet 45 of the liquid container 41 and an outlet 49 that communicates with the inlet 36 of the recirculating fluid line 34. The peristaltic pump outlet temperature sensor 86 and the peristaltic pump safety temperature sensor 88 are connected between the outlet 49 and the inlet 36 of the recirculating fluid line 34 of the bandage device 12.

The outlet temperature sensor 86 of the peristaltic pump 42 provides a feedback signal to the electronic control system 44 for the closed control loop of the heater 40, thereby regulating the temperature of the liquid entering the recirculating liquid line 34 of the bandage device 12 to a desired value, for example 37 ° C. Similarly, the safety temperature sensor 88 provides a feedback signal to the electronic control system 44 that serves to disconnect the wound care device 10 when the temperature of the recirculating liquid exceeds a safe level, for example 41 ° C. Said temperature sensors 86, 88 are, for example, non-contact infrared sensors, for example of the type Irt / c.01HB-J-37C from Exergen Corp., although it is understood that other suitable sensors may be used.

Proximity sensors (not shown) may be used to ensure proper coupling of temperature sensors 86, 88. For example, temperature sensors 86, 88 and optional proximity sensors may be located on a housing or channel in which a pipe extending from the inlet 36 of the recirculating fluid line 34 is installed. If the proximity sensor does not detect the presence of a tube in the channel, the electronic control system 44 may respond accordingly. for example, by indicating this condition and / or triggering an alarm and / or disconnecting the entire system.

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The wound temperature control system 17 further comprises a fluid leak sensor 90 that is connected near the peristaltic pump 42 and serves to monitor the leakage from the peristaltic pump 42 or the connected piping. The leakage sensor 90 in the exemplary embodiment is a capacitive mixer arranged below the peristaltic pump 42. The leakage sensor 90 generates a signal for the electronic control system 44 that can trigger the alatrm and disconnect the wound treatment device 10 if a leak is detected.

The wound care device 10 further comprises a wound discharge collection drainage bag 92, thereby collecting fluid flowing from the bandage device 12 through the discharge conduit 24, consisting of both the fluid supplied to the bandage device 12 through the liquid drug delivery line 22, The drain filter bag 92 comprises a steam filter 94 for filtering the gaseous components of the liquid exiting the bandage device 12. Said steam filter 94 is, in an exemplary embodiment, a standard hospital vent filter designed to be attached directly to the side. drainage bag 92.

Fig. 3 shows an alternative embodiment of wound care device 10 'in which the drainage bag 92 for the discharge and steam filter 94 of wound care device 16 is replaced by a liquid bottle 96, a suction pump 98 and a vacuum filter 100 interposed between the bottle 96 for the liquid and the suction pump 98. The suction pump 98 serves to create a vacuum that facilitates drainage. If necessary, sufficient vacuum can be applied so that the negative pressure acting on the wound 16 facilitates its closing. The vacuum filter 100 in the exemplary embodiment is a hydrophobic bacterial filter which is:

24 placed between the liquid bottle 96 and the suction pump 98.

The drainage device 12 consists, according to FIGS. 4-10, of a liquid medicament supply bandage 18 and a drainage bandage 20. The liquid medicament supply bandage 18 consists of a lower layer 102 and an upper layer 104, between which a liquid drug supply line 22 is arranged, as well as the recirculating fluid conduit 34. The drainage bandage 20 comprises a bottom layer 106 and an upper layer 108, between which an absorbent pad 110 and a conduit 24 for discharging discharge are disposed. The absorbent pad 110 is an example of medically pure hydrophilic foam, although other suitable material may be used as the absorbent. In the exemplary embodiment, the layers 102, 104, 106, 108 of the bandage device 12 are formed of transparent flexible polyurethane or vinyl that meets the requirements of USP Class VI for medical use.

The lower layer 102 of the liquid drug bandage 18 has a generally square perimeter 112 with rounded corners 114 and a tongue 116 on one side of the perimeter 112, as best seen in FIG. 5. Further, a central opening 118 for wound drainage 16 is formed in the bottom layer 102. around which liquid medicament passages 120 are arranged in a circle and drainage passages 122 formed from the central opening 118 in a radial direction away from the liquid medicament passages 120 are arranged in an outer circle. These liquid medicament passages 120 serve to supply liquid medicament from the liquid medicament supply line 22 to the wound 16 and in the exemplary embodiment are smaller than the central opening 118 and the drainage passages 122 that serve to pass the drained liquid through the liquid medicament delivery bandage 18.

The topsheet 104 of the liquid drug delivery bandage 18 has

The generally square periphery 124 with tongue 126, central aperture 128 and outer passages 130. Said elements are aligned with the circumference 112, tongue 116, central aperture 118 and drainage passages 122 of the backsheet 102 as best seen in FIG. 6. When the backsheet 102 and the topsheet 104 are in alignment, the central openings 118, 128 and the outer passages 122, 130 are passable for the liquids, thereby allowing passage of the wound 16 to pass through the liquid drug delivery bandage 18.

The liquid drug delivery line 22 and the recirculating liquid line 34 are in the exemplary embodiment housed in a multi-cavity tube 132, as best seen in FIGS. 7 and 8. It will be understood that separate tubes may also be used. Said multi-cavity tube 132 is in the exemplary embodiment a tube of USP Class VI durometer polyvinyl chloride with three cavities and thus has three channels, one of which constitutes a liquid drug delivery conduit 22 and the other two constitutes a recirculating liquid conduit 34. The multi-cavity 132 has an end 134 that represents the end of the liquid drug delivery line 22.

The recirculating fluid conduit 34 consists of a straight section 136 that extends axially from the end 134 and a generally circular section 138 that extends to the straight section 136 as best seen in FIG. 7. The geometry of the recirculating fluid conduit 34 may vary as needed for fluid distribution. with a controlled temperature in the bandage 18 for the delivery of the liquid medicament. A temperature-controlled liquid, such as water, circulates in the liquid drug delivery bandage 18 through sections 136, 138 and passes through the temperature control system 17 to maintain the temperature of the liquid drug delivery bandage 18 at an optimum value for wound treatment 16. that the temperature of the liquid medicament bandage 18 can be controlled by the electronic control system 44 φ · φφ · 949 • · φ ··· ··

99 φ ·· · ΦΦ · 99

26 according to the selected regime, for example at a value suitable to maximize the effectiveness of treatment with enzymes or other liquid medicaments supplied through the liquid medicament delivery line 22.

The liquid drug delivery bandage 18 is formed by placing a multi-cavity tube 132 between the bottom layer 102 and the top layer 104 such that the multi-cavity tube 132 extends above the tabs 116, 126 and the annular section 138 is concentric with the central openings 118, 128, The lower layer 102 and the upper layer 104 are welded together in a high frequency manner. Circular high-frequency welds 140, 142 seal the circuits of the individual central holes 118, 128 and the drainage passages 122, 130 in alignment. The circuitry 112, 124 of the layers 102, 104 are sealed to each other by the peripheral high-frequency weld 144.

A peripheral high-frequency weld 144 extends from a liquid supply chamber weld 146 which, together with the high-frequency weld 140 of the internal drainage passage, defines a liquid supply chamber 148 which communicates with the liquid medicament passage 120 in the lower layer 102 and end 134 of the liquid supply conduit 22. pharmaceuticals. Thus, the liquid drug aerosol, which is a liquid drug supply line 22 from the atomizer 26 or the liquid drug pump 39, may be supplied through the liquid drug delivery bandage 18 to the wound 16 through a liquid delivery chamber 148 which is separated from the drainage passages 118, 122, 128, 130. In the exemplary embodiment, the recirculating fluid conduit 34 is disposed in the liquid supply chamber 148, but it will be appreciated that the recirculating liquid conduit 34 may also be separated from the liquid supply chamber 148.

The liquid drug delivery bandage 18 further comprises a sealing basket 150 attached to the backsheet 102 near its periphery

4 «» 4 44 44 44 44

445 44 · · ·

444 444 44

4 4444 44 • 4444

27 and 112, as can be seen from FIGS. 4 and 9. In the exemplary embodiment, the sealing basket 150 is formed of a thin foam frame, provided with an adhesive layer for connecting the sealing basket 150 to the backsheet 102 and for detachably joining the sealing basket. a sealing basket 150 with the skin 14 of the patient. The sealing basket 150 improves the seal between the backsheet 102 of the liquid drug delivery bandage 18 and the skin 14 of the patient, thereby allowing the wound treatment device 10 to regulate the atmosphere in the wound area 16. It is understood that to form the sealing basket 150 other suitable materials may also be used, for example, the sealing basket 150 may be a suitable layer of adhesive material.

The lower layer 106 of the drainage bandage 20 with the periphery 152 is provided with a central drainage passage 154 and external drainage passages 156 that are arranged to coincide with the respective periphery 124 and passages 128, 130 of the upper layer 104 of the liquid drug delivery bandage 18. The backsheet 106 is provided with a thin adhesive layer 158 formed as an open frame near the periphery 152, thereby providing a releasable connection to the topsheet 104 of the liquid drug delivery bandage 18. The adhesive layer 158 is formed such that after disengagement the drainage bandage 20 remains on the bottom layer 106 without the need to remove the liquid drug bandage 18.

The top layer 108 of the drainage bandage 20 has no passages and coincides with the bottom layer 106 to form a cavity 160 in which the absorbent pad 110 is disposed. The drainage bandage 20 is formed by receiving an outlet conduit 24 between the bottom layer 106 and the top layer 108. are then welded to each other by high-frequency welding. Thus, the drainage bandage 20 discharges the wound effluent 16 from the liquid medicament bandage 18 through the absorbent pad 110 and away therefrom via the discharge conduit 24.

4

4 • ·

4, and in a system that can be easily replaced, for example when the absorbent pad 110 is saturated or otherwise contaminated.

Thus, the bandage device 12 comprises a two-piece bandage in which the drainage bandage 20 can be removed and replaced while the liquid drug delivery bandage 18 remains in place. Thus, the drainage passages 118, 122, 128, 130 allow access to the wound 16 through the liquid drug delivery bandage 18 when the drainage bandage 20 is removed. Thus, the attendant can remove the culture or sample from the wound 16 without the need to remove the bandage 18 for delivering the liquid drug with the wound 16.

An alternative embodiment of the bandage device 12 'of Fig. 11 consists of a one-piece combination of a liquid medicament bandage 18' and a drainage bandage 20 '. The liquid drug delivery bandage 18 'consists of a backsheet 102' in which a single drainage passage 118 'and a plurality of liquid drug passages 120' are formed. A single drainage passage 128 'is formed in the topsheet 104'. The liquid drug delivery band 18 'is provided with a liquid drug delivery conduit 22' for the purpose discussed above, i.e. for delivering a sprayed or liquid drug and the like. The drainage bandage 20 'consists of an insert 110', an upper layer 108 ', and a discharge conduit 24'. This outlet 24 'is connected to a bandage device 12' between the topsheet 104 'and the topsheet 108'.

Another alternative embodiment of the bandage device 12 '' consists only of the lower layer 102 '' and the upper layer 104 '' according to Fig. 12. A drainage passage 118 '' and a plurality of liquid drug passages 120 '' are centrally formed in the lower layer 102 '' and are arranged in a circle around the drainage passage 118 ''. The liquid medicament delivery line 22 '' and the effluent discharge line 24 '' are • · · ·

29 arranged between the backsheet 102 '' and the topsheet 104 ''. The liquid medicament supply line 22 '' and the liquid medicament passages 120 '' are separated from the high-frequency weld (not shown) from the discharge conduit 24 '' and the drainage passage 118 ''.

Fig. 13 shows another alternative embodiment of a bandage device 12 '' 'with a rectangular backsheet 102' '' and a topsheet 104 '' '. The liquid medicament passages 120 '' 'are arranged in a rectangle and allow liquid medicament delivery and control of the atmosphere around the elongated shape wound 16. The drainage passage 118 '' 'is circular in the exemplary embodiment but may also have any other suitable shape, for example rectangular or elliptical. From the embodiment of the bandage device 12 '' ', it can be seen how the bandage device according to the invention can be easily adapted to the wound 16 of any shape by suitable adjustment of the geometric shape.

Another alternative embodiment of a drainage bandage 20 '' comprising a bottom layer 106 '', a top layer 108 '' and an absorbent pad 110 '' is shown in Figure 14. The bottom layer 106 '' and the top layer 108 '' are provided with respective passage portions 107 '' and 109 ''. The drainage bandage 20 '' is formed by welding together the bottom layer 106 '' and the top layer 108 '' at their periphery, so that passage sections 107 '' and 109 '' form a passage suitable for connection to the outlet 24. The drainage bandage 20 '' can be used in the same way as the drainage bandage 20 described above so that the wound effluent 16 from the liquid drug delivery bandage 18 passes through the drainage bandage 20 '' as shown by arrows 99 '' and 101 ''.

As mentioned above, the heater 40 may be replaced by another heating system, for example, a recirculating fluid heater 200 as shown in FIGS. 15-18. On • · · ·

Thus, FIG. 15 illustrates another alternative embodiment of the bandage device 12 '. This bandage device 12 '' '' consists of a liquid drug delivery bandage 18 '' 'which differs substantially from the liquid drug delivery bandage 18 shown in Figures 4-6 by the shape of the external drainage passages 122' ''. '', which have the shape of segments of the annulus. The bandage device 12 '' '' comprises a drainage bandage 20 '' '' of substantially the same construction as the drainage bandage 20 '' described above. The bandage device 12 '' '' further comprises an outlet conduit 24 which is connected to the steam filter 94.

The heating device 200 includes a radiant heating plate 202 adapted to contact a heat exchanger 204 in which the recirculated liquid passes around the radiant heating plate 202. As seen in FIG. 15, the heat exchanger 204 comprises a tube 206 that can be passed through a channel 208 in the peristaltic The heat exchanger 204 is further provided with an inlet 210 and an outlet 212 which are connected to the spray cap 214 of the sprayer 26, which communicates with the multi-cavity tube 132, which leads to the bandage device 12 '. '' '. The multi-cavity tube 132 is connected to the bandage device 12 '' '' by a coupling 216.

In the exemplary embodiment, the heat exchanger 204 is formed by a pair of plastics sheets welded together to form an inlet passage 218 and an outlet passage 220 according to FIG. 16. The inlet passage 218 is connected to the inlet 210 of the heat exchanger 204 and to the tube 206, The heat exchanger 204 is folded around its center axis 222, as shown in FIG. 17, so that the inlet passage 218 is opposite the outlet passage 220. The side edges 224, 226 of the heat exchanger 204 that extend from the center axis 222, *

31 are then welded together, as indicated by arrows 230, to form a pocket 228 for receiving a radiant heating plate 202 so that the recirculating liquid passes through the heat exchanger 204 around the radiant heating plate 202.

As the liquid passes through the heat exchanger 204 around the radiation heating plate 202, the temperature of the liquid is measured, for example by means of an infrared temperature sensor 238. The temperature of the recirculating liquid is then controlled to a desired value by controlling the heating power of the radiation heating plate 202 based on the measured liquid temperature. It will be understood that the heat exchanger 204 may be replaced by another suitable device, for example a tube attached to the flexible sheet or by narrow, for example parallel passages between the flexible sheets and the like. It is essentially to provide a heat exchanger capable of transferring heat from the radiation heating plate 202 to the recirculating liquid while controlling the temperature of the recirculating liquid.

The radiator heating plate 202 comprises, in the embodiment of FIG. 18, two plates 228, 230 which are connected to the base 232. The plates 228, 230 are provided with resistive heating elements 234 which are adjustable to control the temperature of the liquid passing through the heat exchanger 204 around it. the radiator heating plates 202. The plates 228, 230 are further provided with apertures 236 facilitating the installation of the infrared temperature sensor 238 of the recirculating liquid. The radiation hotplate 202 and infrared temperature sensors 238 are connected to the electronic control system 44, thereby providing automatic temperature control of the recirculating liquid.

An alternative drainage system 162, as shown in FIG. 19, may be in the wound treatment device 10, 10 'of FIG.

4 ·· 4 4 4 · 44 444 · 44 444

The drainage system 162 comprises a first drainage bag 164 and a second drainage bag 166 and valves 168, 170, which are included among the drainage bags. 164, 166 and through the outlet 24. The drainage bags 164, 166 are provided with sensors 172, 174, which supply the electronic control system 44 with pressure signals prevailing in the drainage bags 164, 166, which indicate the filling state of the drainage bag 164, 166 and hence the need for replacement. The drainage bags 164, 166 are further provided with bacterial filters 190, 192 and ventilation valves 186, 188, which can be used by the electronic control system 44 to release excess pressure within the drainage bags 164, 166.

Drain bags 164, 166 are connected to pump 17 via ventilation valves 186, 188, pressure regulator 182, and filter 184. Valves 168, 170 are connected to electronic control system 44, which allows automatic selection of the drain bag 164, 166 to be connected to the bandage device 12, 12 'and to take the discharge from the bandage device 12, 12'. Thus, the drainage system 162 allows the wound care device 10, 10 'to operate continuously. Under this wound care device 10, 10', the valve 170 is closed and the valve 168 is opened to allow the drainage bag 164 to be filled. signals to the electronic control system 44 that the drain bag 164 has been filled, the valve 168 closes and the valve 170 is opened to allow the drain bag 166. With the valve 168 closed, the valve 178 is opened and pressurizes the drain bag 164 to thereby contain the drainage contents. As soon as the sensor 174 signals that the drain bag 166 has been filled, the valve 170 closes and the valve 168 is opened to allow the drainage tube to be filled again.

3344 4444 bag 164. When valve 170 is closed, valve 168 is opened and pressurizes the drain bag 166, thereby pushing the contents of the drain bag 166 through the bacterial filter 192. These cycles are repeated so that the drain line 24 is not exposed back pressure.

FIGS. 20 and 21 show another possible embodiment of wound treatment device 320, which comprises a line 322 for delivering liquid medicament to the wound 16, a suction pump 326 and a reservoir 324 for sucking and storing liquid from the wound 16. Supply hose 328 is connected to a liquid drug delivery line 322 and a fluid hub 330. This fluid hub 330 includes a fluid conduit or diaphragm 332 having an aperture 333 and a coupling 334 for circulating fluid distribution.

In an exemplary embodiment, the membrane 332 is made of two sheets joined at the sides or may be made of a hose. The material of the membrane 332 may be rubber, plastic or other suitable material. In another embodiment, the diaphragm 332 is provided with a funnel-shaped extension 338 that leads to the aperture 333 as best seen in FIG. 21. This funnel-shaped extension 338 allows the flow rate of the liquid medicament to be controlled. The operator may cut the membrane 332, thereby shortening its length and increasing the flow of the liquid medicament. The larger piece of funnel 338 is cut off, the higher the flow.

The circulating fluid conduit 334 has two connections 340, 342 that extend from opposite sides of the membrane 332 of FIG. 21. A circulation hose 344 is attached to the connections 340, 342, which encircles the periphery of the wound 16 on the healing tissue. Collecting openings for the liquid or jams 346 are formed along the length of the circulation hose 344. For example, port 342 is connected to outlet pipe 348, while port 340 is connected.

- 34 is the end. Thus, all the fluid in the circulation hose 344 is forced to flow in one direction to the outlet conduit 348. As a result, the fluid flows out of the diaphragm 332, passes over the wound 16, the intercepts 346 are sucked into the circulation hose 344 and exits the outlet conduit 348. 326 is connected to the outlet duct 348 by suction duct 350 through a reservoir 324, thereby allowing suction of liquid from the wound 16 into the reservoir 324.

The circulation hose 344 may comprise a flexible wire 352 that extends through the circulation hose 344. This flexible wire 352 determines the shape of the circulation hose 344, which may thereby conform to the circumference of the wound 16 and retain its shape. As can be seen from FIG. 22, the diameter 358 of the flexible wire 352 is smaller than the diameter 354 of the circulation hose 344, so that the flexible wire 352 does not prevent fluid flow.

The fluid hub 330 adheres to an adhesive pad 361 that is adhered to healthy tissue near the wound 16. It should be noted, however, that the fluid hub 330 can attach to the patient's skin 14 in many other suitable ways. The topsheet 362 is sized to overlap the wound treatment device 320 and may be detachably attached directly to healthy tissue (not shown). In the exemplary embodiment, the topsheet 362 is made of a transparent flexible polyurethane or vinyl that meets the requirements of USP Class VI for medical use. The basket or rim 360 has a generally square shape with rounded corners, is applied to the patient's skin 14 around the circumference of the circulation hose 344 and serves as a seal. In one embodiment, the skirt 360 is disposed below the topsheet 362 as shown in Fig. 21. In addition, the skirt 360 is connected to the fluid hub 330 by fasteners 364 that extend through the holes 366.

FIGS. 23 and 24 show another embodiment of wound treatment device 16. Fluid supply pipe 382 extends to outer chamber 378. This outer chamber 378 is formed around the periphery of inner chamber 374. Chambers 374 and 378 are shown in FIGS. 24 is defined by an upper layer 372 and a lower layer 373. The inner chamber 374 is defined by the high-frequency weld around its periphery between the layers 272 and 273, while the outer chamber 378 is defined by the high-frequency weld around its periphery. The welds form an inner flange 375 and an outer flange 380. It will be understood that other suitable means may be used to form the flanges 375 and 380 instead of the ultrasonic welds. For example, the skirts 375 and 380 may be formed by adhesive or by local heat application to the layers 372, 373.

A basket 383 is disposed around the outer rim 380 of the bandage. The basket 383 carries layers 372 and 373 forming a cavity 379 around wound 16 as seen in Figure 24. An adhesive layer 384 is attached to the underside of the basket 383 to adhere to healthy skin 14. around the wound 16 (not shown) so that the wound care device 368 remains in place and the liquid medicament remains in the cavity 379 around the wound 16.

The liquid medicament is supplied through the liquid inlet pipe 382 to the outer chamber 378. In the lower layer 373, several passages 377 are formed which extend into the cavity 379 above the wound 16. The liquid is then discharged from the surface of the wound 16 through an outlet port 376. By means of the vacuum applied to the outlet tube 370, the liquid medicament is sucked from the inner chamber 374 into the outlet tube 370 and finally goes to waste. Along the length of the outlet tube 370, liquid collecting openings or interceptions 346 are formed within the inner chamber 374 with spacing therebetween, which further assists

* 9 • 99 9

- 36 when draining liquid.

It should be noted that the flow direction of the liquid medicament may be opposite to that previously described. For example, the liquid medicament may enter the wound treatment device 368 through the outlet pipe 370 and be fed into the cavity 37 9 above the wound 16 through an outlet port 376. The fluid may then be discharged through the passage 377 into the outer chamber 378 and away therefrom through the liquid supply pipe 382. The passage 377 may be of any size suitable for sucking liquid from cavity 379 above wound 16 into outer chamber 378.

25 and 26, another embodiment of wound treatment device 386 is shown. In contrast to the previous embodiment, the liquid supply tube 382 in this embodiment leads to the inner chamber 374. As in the previous embodiment, around the periphery of the inner chamber 374 is shown. An outer chamber 378 is formed. Further, the chambers 374 and 378 are delimited by the topsheet 372 and the bottomsheet 373 of FIG. 26. Again, the chambers 374 and 378 are defined between the layers 372, 373 by high-frequency weld around the periphery of the inner chamber 374 and high-frequency weld around the outer chambers 378. The welds form an inner rim 375 and an outer rim 380. It will be understood that other suitable means may be used to form rims 375, 380 instead of high-frequency welding.

The liquid medicament with the liquid inlet pipe 382 is introduced into the inner chamber 374. This is different from the previous embodiment, where the liquid medicament through the liquid pipe 382 is introduced into the outer chamber 378. The liquid medicament can then pass through the inlet port 385 in the lower layer 373 into the cavity 379 above wound 16 and to this wound 16. In the lower layer 373, passageways are formed in the region of the cavity 379 with respect to one another.

In one exemplary embodiment, the passages 381 are larger than the passages 377 of the previous embodiment. The liquid medicament is removed from the surface of the wound 16 through passages 381. In one embodiment, openings or intersections 346 are formed at intervals along the tube 391 that extends through the outer chamber 378. The tube 391 extends through the outer chamber 378. Due to the negative pressure applied to the outlet tube 391, the liquid medicament is sucked from the outer chamber 378 into the tube 391 and finally into the waste container. Other features such as scythe 383 and adhesive layer 384 are similar to the previous embodiment.

It should be noted that the flow direction of the liquid medicament may be opposite to that described above. For example, the liquid medicament may be fed to the wound treatment device 386 through a tube 391, flow from the baffles 388, and pass the passages 381 into the cavity 379. The liquid medicament may then be sucked through the inlet port 385 into the inner chamber 374 and further away . The passages 381 may be of any size suitable for passage of a liquid medicament from the outer chamber 378 to the cavity 379 above the wound 16.

Referring to Figs. 27-29, a further embodiment of wound treatment device 392 is shown. This wound treatment device 392 includes a chaplet supply tube 396 that extends, in an exemplary embodiment, to the center of wound treatment device 392 to outlet port 398. The outlet port 392 is shown in FIG. an opening 398 opens into a cavity 400 above the wound 16, which is formed on the underside of the wound care device 392 according to FIGS. 28 and 29. A reservoir 402 is formed above the cavity 400 around the outlet port 398. the inner wall 410 separates the reservoir 402 from the outlet opening 398. The outer wall 412 defines the periphery of the reservoir 402. Around the inner wall 410.

The columns 404, as shown in FIG. 27, extend from the reservoir 402 in a circle, as shown in FIG. 27. An upper layer 405 is disposed above the reservoir 402 and, in an exemplary embodiment, is attached to the upper edge of the outer wall 412. The topsheet 405 above the reservoir 402. Thus, the topsheet 405 collapses into the reservoir 402 and the passages 406 are not obstructed when a negative pressure is applied to the wound treatment device 392.

An adhesive pad 394 has been attached to the periphery of the cavity 400 of the wound care device 392. As in previous embodiments, the adhesive pad 394 adheres to the healthy skin 14 of the patient about the wound 16. It should be noted that the adhesive pad 394 may be replaced by a variety of other means. receiving a wound treatment device 392 above the wound 16.

For example, the liquid medicament flows from the liquid inlet tube 396 through the outlet port 398 to the cavity 400 above wound 16 and to this wound 16. The liquid is then aspirated through the passage 406 and collected in the reservoir 402. The collected liquid is then aspirated from the reservoir 402 tubes 414 and finally into a waste container (not shown). Similar to other embodiments already described, a vacuum source may be connected to the outlet pipe 414 as described above.

It should be noted that the flow direction of the liquid medicament in the wound treatment device 392 may be opposite to that previously described. For example, the liquid medicament may be fed to the wound treatment device 392 through the outlet tube 414 and flow through the passage 406 into the cavity 400. The liquid medicament may then be sucked through the outlet port 398 into the liquid inlet tube 396. The passages 406 may be of any size suitable for the passage of a liquid medicament into the cavity 400 above or from wound 16.

- 39 cavity 400.

Referring now to Figs. 30-32, another possible embodiment of a flexible wound treatment device 420 is shown. The liquid supply tube 382 extends through the top panel 422 into chamber 424. This chamber 424 is formed between the top panel 422 and the middle panel 426 and is shown in Figs. 30 and 31 are defined by an inner flange 375 and an outer flange 380. For example, the flanges 375 and 380 are formed by high-frequency welds around the circumference of the chamber 424, as discussed above. A plurality of passages 377 pass through the central panel 426 into the cavity 428 above wound 167. The cavity 428 above wound 16 is defined by two side walls 430 and 432 and two end walls 434 and 436 extending between said side walls 430 and 432. in one plane, the corners of the walls 430, 432, 434 and 436. The result is a flexible or flexible body. A spacer spacer 442 is provided in the circumference of the cavity 428 above the wound 162. The spacer spacer 442 is made of foam material in the exemplary embodiment, but it is understood that it may also be made of any other suitable material that will contribute to maintaining the shape of the cavity 428. 31 and 32.

A cushion 438 is disposed around the periphery of the cavity 428 above the wound 16 and attached to one of the planar corners of the walls 430, 432, 434, and 436 opposite the central panel 426. This cushion 438 is made of a thin flexible foam material, preferably plastic coating. This cushion 438 forms a cushion between the walls 430, 432, 434 and 436 and an adhesive film 440 having similar properties to the adhesive compositions described in connection with the previous embodiments.

The flexible wound care device 420 is optimal for wound care 16 on flexible joints such as knees and elbows.

· · «« «

This is due to the spacer spacer 442 keeping the center panel 426 raised sufficiently so that when the wound 16 is lifted when the joint is bent, the wound 16 does not contact the center panel 426 as shown in FIG.

In a similar manner to the previous embodiments, the liquid medicament is supplied by the liquid supply tube 382 to the chamber 424 from where it flows through the passages 377 into the cavity 428 above the wound 16. In this cavity 428 the outlet tube 448 extends through the spacer 442. the exit tube 448, which is disposed within the cavity 428, may be formed by slugs 346 so that liquid medicament after passing around the wound 16 is discharged through the orifice 437 and / or the slugs 346 into the outlet tube 448. As in previous embodiments, The flow rate of the liquid drug may be reversed. Liquid medicament may be delivered to wound 16 through outlet pipe 448 and discharged through passages 377 into chamber 424 and away through fluid supply pipe 382.

Referring to Figures 33 and 34, another embodiment of the invention is comprised of a heating system 500 coupled to a bandage 499. It should be noted that the heating system 500 may be coupled to any of the bandages described herein. The heating system 500 includes a heating and sensing pad 502, thermocouples 508 and 510, a pipe 504, and a connector 506 to the control unit. The heating and sensing pad 502 is part of a heating system 500 that transfers heat to the bandage 499 while simultaneously sensing the amount of heat transferred. The heating and sensing pad 502 includes a thermocouple 508 as shown in FIG. 34, which supplies heat to the heating and sensing pad 502. The second thermocouple 510 senses the heat supplied by the thermocouple 508. The heating and sensing pad 502 may be made of silicone, for example. The heating and sensing pad 502 may be made of any other suitable material with similar properties

44 ··, 4 4 · 4 4

4 4 · 4,444

4 · 444 4444

444 444 44

44 4444 44

- 41 94 4,444 with silicone properties. The heating and sensing pad 502 may either be inserted into the pocket 503 in the bandage 499 or attached to the bandage 499 in any suitable manner. The heating and sensing pad 502 can be used to transfer heat from the thermocouple 508 to the bandage 499. Both thermocouples 508, 510 are led from the heating and sensing pad 502 to the connector 506 of the control unit. Both thermocouples 508, 510 may be housed in a tube 504 protecting them. The tube 504 may be flexible, made of any suitable material and of any suitable length.

By connector 506, the heating system 500 is connected to a spray system (not shown) and may be removed for use with other bandages. A dual channel tube 512 may be connected to the tubular connector 513 to supply liquid medicament to the bandage 499 and to draw liquids therefrom as described in the previous embodiments.

The invention has been described in detail in the foregoing popois in connection with certain preferred embodiments. However, many other variations and modifications are within the spirit and spirit of the invention, which are also within the scope of the protection defined by the following claims.

Claims (9)

Ρ A Τ E N E C O R T E R T E R T E R E C D A wound care device comprising: a bandage adapted to cover the wound and to seal the wound around its periphery, wherein a cavity is formed in the bandage above the wound, which is connected to the liquid inlet and to the drainage to drain the liquid. Device according to claim 1, characterized in that an atomiser is provided in the liquid supply. Device according to claim 1, characterized in that a liquid medicament pump is provided in the liquid supply. Device according to claim 1, characterized in that a suction pump is provided in the liquid drainage and the bandage forms a relatively sealed space above the wound for maintaining the vacuum. Device according to claim 1, characterized in that a pipe for recirculating the temperature-controlled liquid is connected to the bandage. 6. The apparatus of claim 5, further comprising a heater and heat exchanger disposed in the temperature controlled liquid recirculation tube. 7. The apparatus of claim 6, further comprising a temperature sensor that is connected to said temperature sensor. - 43 ΦΦ · »Φ Φ 4 Φ>>> Φ ΦΦ to the temperature controlled liquid recirculation pipe. The apparatus of claim 7, further comprising a control circuit and a shut-off valve, the control circuit being connected to a temperature sensor and a shut-off valve, which is arranged in the liquid supply line, the control circuit being adapted to activate the shut-off valve. based on the signal from the temperature sensor. 9. Equipment according to of claim 3 č u j ící se by that k the liquid supply is further power supply connected of oxygen. 10. Equipment according to of claim 9 č u j ící se further comprising an oxygen inlet, an air inlet, and a valve system, the first inlet of which is coupled to the oxygen inlet, the second inlet is coupled to the air inlet, and the outlet is coupled to the liquid medicament inlet. Device according to claim 10, characterized in that the valve system consists of a two-port selection valve. The apparatus of claim 1, further comprising a pressure sensor that communicates with the fluid supply conduit. 13. The apparatus of claim 12, further comprising a pressure sensor communicating with the fluid supply conduit and a control circuit coupled to the pressure sensor and display, wherein the control circuit is provided with a pressure sensor. 00 0 - 44 for displaying data on the display based on the data obtained by the control circuit from the pressure sensor. 14. The apparatus of claim 12, further comprising a control circuit coupled to the pressure sensor and adapted to generate an alarm signal when the reading obtained by the control circuit from the pressure sensor exceeds a predetermined threshold. 15. The apparatus of claim 1, further comprising a basket adapted to be inserted between the bandage and the skin surface around the wound. 16. The apparatus of claim 1, wherein the bandage is two-piece and consists of a lead bandage adapted to seal the wound and comprising said cavity and a drainage bandage adapted to be coupled to the lead bandage. 17. The apparatus of claim 1 wherein the bandage is provided with a fluid supply conduit disposed at the wound for supplying liquid to the wound, and a fluid drainage conduit provided with at least one liquid collection aperture and arranged around the wound. Apparatus according to claim 16, characterized in that the liquid supply line is provided with a funnel-like extension. Device according to claim 16, characterized in that the bandage covers the liquid supply line and the liquid drainage line and forms a closed space above and around the wound. 20. The apparatus of claim 2, further comprising a sensor coupled to the nebulizer and adapted to signal the amount of liquid within the nebulizer. Device according to claim 12, characterized in that the sensor is an acoustic sensor. 22. The apparatus of claim 12, further comprising a control circuit connected to the sensor and adapted based on the data obtained by the control circuit from the sensor to determine whether the liquid reservoir of the dispenser contains liquid. 23. The apparatus of claim 2, further comprising an electronic control system coupled to the atomizer to control the output of the atomizer. 24. Wound care equipment, comprising: a first bandage adapted to cover the wound, the first bandage having a first surface adapted to face the wound, at least one liquid inlet passage formed in the first surface and at least one fluid drainage passage formed in the first surface; a fluid supply line communicating with the fluid supply passage; a second bandage adapted to be coupled to the first bandage, wherein the second bandage has a second surface adapted to face the first bandage and create a fluid space between the surfaces; and ··· · ··· «· · · · · · · · · · - 46 ·· * ·· · drainage piping for liquid connected to a drainage passage for liquid. 25. The apparatus of claim 24, wherein the at least one liquid feed passage comprises a plurality of feed passages. 26. The apparatus of claim 25, wherein the plurality of feed passages are arranged substantially in a circle. 27. The apparatus of claim 24, further comprising a drained liquid reservoir connected to the fluid drainage conduit. 28. The apparatus of claim 27, further comprising a filter coupled to the drainage fluid reservoir. 29. The apparatus of claim 24, wherein the first bandage comprises a first resilient and relatively impermeable layer forming the first surface and a second bandage comprising a second resilient and relatively impermeable layer forming the second surface, wherein in the second bandage a closed closed vacuum is formed over the wound. space. 30. The apparatus of claim 24, further comprising a basket adapted to be inserted between the bandage and the periphery of the healthy tissue surrounding the wound and forming a relatively tightly closed space above the wound, maintained under negative pressure. · »···· · 9 9 9 9 · · · · · · · The apparatus of claim 24, wherein the fluid space is divided into a first chamber and a second chamber, the first chamber being formed around the liquid inlet passage and the second chamber being formed around the drainage liquid passage. 32. The apparatus of claim 31, wherein the fluid supply conduit communicates with the first chamber and the drainage fluid passage communicates with the second chamber. 33. Wound care equipment, comprising: a bandage with a wound facing surface and a fluid drainage passageway with an aperture near the wound facing surface; a fluid drainage pipe connected to a fluid drainage passage; first and second drainage fluid containers connected to a liquid drainage line; and a first and a second valve positioned between the fluid drainage conduit and the first and second drainage fluid reservoirs. 34. The apparatus of claim 33, wherein the valves are push-buttons. 35. The apparatus of claim 33, further comprising a sensor coupled to the first drainage fluid container to indicate the amount of liquid in the first drainage fluid container. 4 4 4 4 4 4 • 4 44 4 4 4 4 4 4 4 4 4 4 4 · <4 44 · 36. A wound care device comprising: a cover band adapted to cover the wound and sealing on healthy tissue around the periphery of the wound, the cover band forming a relatively closed, vacuum maintained space around the wound; a fluid supply conduit arranged between the cover bandage and the healthy skin of the tissue near the wound; and a drainage pipe with at least one drainage fluid opening disposed between the cover bandage and the healthy skin of the tissue near the wound and the inlet pipe. 37. The apparatus of claim 36, wherein the liquid supply line is connected to the liquid drug supply. 38. The apparatus of claim 36, further comprising a drained liquid reservoir communicating with the fluid supply line and a vacuum source. 39. The apparatus of claim 36, wherein the drainage pipe is formed by a flexible hose extending along the length of the drainage pipe. 40. Wound care devices, comprising: a cover band sealing around the wound and forming a relatively closed, vacuum maintained cavity over the wound, the cover band having a first surface adapted to face the wound through which at least one liquid inlet passage and at least one drainage passage passes and a second surface facing the wound a first surface and defining a fluid space therebetween, which is divided into a first chamber and a second chamber, the first chamber being formed 49 around a liquid supply passage and a second chamber formed around the drainage passage; the liquid supply line communicates with the first chamber and the liquid supply passage; and a drainage pipe with at least one drainage fluid opening is connected to the second chamber and the drainage passage. 41. The apparatus of claim 40, wherein the drain line is disposed within the first chamber. 42. Wound care equipment, comprising: a cover band sealing around the wound and forming a cavity above the wound to the joint, the dimensions of which are adapted to the joint and in which vacuum is maintained, the cover band having a first surface adapted to face the wound through which at least one liquid inlet passage and at least one a drainage passage, and a second surface facing the first surface and defining a liquid space therebetween; the liquid supply line communicates with the liquid space and the liquid supply passage; and a drainage pipe with at least one drainage fluid opening is connected to the cavity. 43. The apparatus of claim 42, further comprising a heater and a temperature sensor coupled to the cover bandage. 44. The apparatus of claim 43, further comprising a heater and a temperature sensor connected to said device. - 50 to cover bandage and sprayer.