CN101378795A

CN101378795A - Device, pump and system for stimulating the healing of a wound

Info

Publication number: CN101378795A
Application number: CNA2007800043344A
Authority: CN
Inventors: B·尼尔森; J·M·B·弗雷泽里克森; T·S·拉森; E·L·耶普森; N·维德; K·布迪格
Original assignee: Coloplast AS
Current assignee: Coloplast AS
Priority date: 2006-02-02
Filing date: 2007-02-01
Publication date: 2009-03-04
Also published as: CN101378803A; CN101378793A; CN101378794A

Abstract

A device for stimulating the healing of a wound comprises a separating means having a fluid inlet and a gas outlet. The separating means may constitute a collecting container for collecting fluid pumped from the wound. A pump for applying negative pressure comprises pump head and a drive unit. The pump head is connected to the gas outlet of the separating means, and the pump head is detachably attached to the drive unit, so that in use the fluid inlet of the separating means is connected to a wound cover, e.g. via a conduit.

Description

Be used for promoting device, pump and the system of wound healing

Technical field

The present invention relates generally to some is used for getting rid of the negative pressure system that therefore fluid also strengthens wound healing, i.e. suction system from wound.Such system can comprise wound covering thing and pump, described wound covering thing can be attached on the biological wound perimeter, to form closure, described pump is communicated with the closure fluid, forms pressure reduction between the air pressure with negative pressure in closure and surrounding space.

Background technology

Have found that the fluid conduction of wound promotes tissue growth, and helps to shorten healing time thus.Treatment has been carried out many year, and develops various therapeutic equipments and be used for providing suction to wound.

US 6,648,862 have described a kind of vacuum desiccator that adopts jar, the described canned trapping agent that has, and WO 97/18007 discloses a kind of portable wound therapy equipment, and described equipment has jar and pump, and described pump is arranged in the shell, this shell helps portable use, for example can wear on braces or by belt.

In known device, the wound covering thing is fixed on the biological skin with sealing means, thereby forms closure around wound.Covering is connected on the pump, and applies suction.This suction forces transudate to move on to the container from closure.

WO 03/018098 discloses a kind of system that is used to promote organization healing, and this system comprises the porous pad that is arranged in the wound cavity and be fixed on airtight dressing on the pad, so that provide gas-tight seal for the wound cavity.The near-end of conduit can be connected in the dressing.The far-end of conduit can be connected on negative pressure source or the wall suction inlet, and this negative pressure source can be the electrodynamic pump that is contained in the light shell.Along conduit jar is set, to remain on the transudate that applies during the negative pressure from the wound location suction.First hydrophobic filter is arranged on the opening part of jar, to survey a jar full state.Second hydrophobic filter is arranged between first filter and the negative pressure source, in case the non-once of locking system part is polluted by the transudate of extracting out from wound.The abnormal flavour filter is arranged between first and second hydrophobic filter, to help the minimizing of abnormal flavour gas.Provide fixed mechanism, so that light shell can be fixed on the fixed object, on Cribguard or venous transfusion support bar.Be provided for mechanism, with the healing of further enhancing and promotion open wound along with automatic oscillation pressure of time.The mechanism that is provided for changing the mechanism of pump driving frequency and is used to control portable power supplies is to improve battery life and to improve patient's mobility.

In being used for the treatment of multi-user's pumping system of wound, the cross-contamination between the user will be avoided.

Summary of the invention

A purpose of the preferred embodiment of the present invention provides a kind of improved wound healing system, and this system reduces to minimum with the danger of manufacturing cost and cross-contamination.

In first aspect, the invention provides a kind of device that utilizes the wound covering thing to be used to promote wound healing, this device comprises:

-separating mechanism, this separating mechanism comprises fluid inlet and gas outlet,

-being used to apply the mechanism of negative pressure, this mechanism comprises pump head (head) and driver element,

-pump head, this pump head are connected in the gas outlet of separating mechanism, and wherein, pump head removably is attached on the driver element,

So and in use, the fluid inlet of separating mechanism for example is connected on the wound covering thing through conduit.

In second aspect, the invention provides a kind of system that is used to promote wound healing, this system comprises the device and the wound covering thing of first aspect present invention.

In the third aspect, the invention provides a kind of pump that is used for the therapentic part suction flowing material on biology or the biology, this pump comprises:

The disposable suction element that-motor drives;

-driver element, this driver element is used for providing driving force to suction element, and its motor is included in the shell of pump;

Suction element is detachably connected on the driver element by this way, and promptly Chou Xi fluid does not contact with driver element.

In fourth aspect, the invention provides a kind of system that is used to promote wound healing, this system comprises one or more devices of the system of the pump of third aspect present invention and a second aspect of the present invention.

Following description is applied to all aspects of the present invention.

Aspect of the present invention first and second, before the material of suction enters pump, separating mechanism will be separated from the gas from the fluid of wound suction.Therefore, can prevent from the fluid of wound suction at least basically and may also have solid matter to enter the pump, the danger that can avoid wearing and tearing and pump for pump to block thus.And the pump of pumping liquid and solid matter can be not simpler, owing to the less small driving force that needs of viscous drag in pump, and with the cost manufacturing lower than the pump of those pumping liquids and/or solid matter.Pump can comprise peristaltic pump, in this peristaltic pump, negative pressure produces by the continuous pucker ﹠ bloat of the flow cross section of pipe, pucker ﹠ bloat is for example realized by pivo table member, this pivo table member has the one or more ledges on the outer surface that acts on pipe, and the flow cross section that causes pipe thus is pucker ﹠ bloat in succession.Replacedly, pump can comprise that at least one can move back and forth element, and such as piston or barrier film, described element is arranged to make the continuous pucker ﹠ bloat of suction chamber, is provided preferably with corresponding check valve in the import and the exit of this suction chamber.

Term " suction element " and " pump head " are represented such element as used herein, and promptly Chou Xi material and/or gas flow through these elements during aspirating.Therefore, term " suction element " and " pump head " do not comprise the driving element that is used to drive suction element and pump head in this article usually.Any suction structure or the pump of suction action finished in term " pump " and " being used to apply the mechanism of negative pressure " expression, comprising the driving element that is used to drive suction element or pump head.

In a preferred embodiment, the mechanism that is used to apply negative pressure comprises the critical piece of two removable attachment, i.e. pump head and driver element.Pump head can for example comprise above-mentioned piston or barrier film, and driver element can comprise and pump head is moved back and forth or causes those elements that suction action is required.Preferably, the close and/or gas-tight seal of liquid is arranged between pump head and the driver element, enters in the driver element so that prevent gas and/or liquid.For example, comprise that the pump head that resembles piston or barrier film and so on can lean against on the wall dividing plate along the periphery sealing.Can avoid driver element to pollute thus, perhaps can reduce the danger that driver element pollutes.Therefore, in the middle of using this device, different patients have only pump head to need sterilization.Replacedly, pump head can be incorporated in the disposable unit.Because pump head removably is attached on the driver element, so pump head can easily sterilize and/or change.

The mechanism that is used to apply negative pressure can produce the pressure reduction that is enough to take away from wound liquid, for example with respect to the negative pressure of ambient atmosphere in 10mm Hg to 600mm Hg scope.

When on wound, putting covering, on wound location, just can form gastight substantially sealing, to prevent vacuum leak.Covering is placed on forms a kind of like this sealing on the wound, make covering adhere on the healthy skin of wound location, originally keep gas-tight seal on one's body at wound simultaneously.In this article, " airtight " and " airtight basically " should be understood to be meant in the wound, can keep negative pressure in the operating period of pump at least.

The wound covering thing can be block or half block vapor permeable for example, and water impermeable.In one embodiment of the invention, make the wound covering thing become semipermeable by forming the wound covering thing with semi-transparent cover foil.In this relation, term half can see through and be meant that steam can see through.In one embodiment, the utilization of wound covering thing is held in place in the surface of a wound covering thing part or whole lip-deep binding agent.In another embodiment of the present invention, the wound covering thing is held in place by the negative pressure that system applied.

The mechanism that will be used to apply negative pressure is arranged to two detachable blocks and has several advantages.Pump head generally includes main mechanical part, and driver element also comprises than sensor, for example as motor, electronic circuit and possible control unit.In pump head, form negative pressure just, so vacuum.Because each parts can be dismantled mutually, and since driver element for potential in spite of illness the poison or the band antibacterial air or contacting of transudate isolated, so driver element is reusable, and no-trump virus or antibacterial may be infected any danger to the next user of system.Therefore, system of the present invention provides a cost advantage, because the critical piece of system, the driver element that promptly is used to apply the mechanism of negative pressure can be repeated to use.Because driver element is because of the normally expensive component of its electronic component, so this cost advantage is sizable with respect to the totle drilling cost of system.

Pump head and driver element removably are attached to each other.Being connected between pump head and driver element can be taked several different modes.Those skilled in the art will know the suitable mode that this connection is provided.

In a preferred embodiment of the invention, pump head is disposable.Detachable pump head is disposable and can changes, and driver element does not contact with the air of potential poison in spite of illness or antibacterial again, so reusable because it had not both contacted with transudate.Because pump head mainly comprises machinery and simple components, thus might be by comparatively cheap material manufacture pump head, and this has reduced the cost of pump head.Pump head can for example be attached to and be used for collecting fluidic jar or container from wound or therapentic part.Container can for example comprise the inlet hole that is connected to conduit, and described conduit is provided to the flow passage of therapentic part.In addition, container can provide the outlet of the inlet hole that is connected to pump.In the device of first aspect present invention and in the system of second aspect present invention, the delivery side of pump hole preferably is connected on the air vent, and by this air vent, the gas of suction can be sucked in the ambient atmosphere.In the pump of third aspect present invention and in the system of fourth aspect present invention, the delivery side of pump hole can or be connected on the air vent under the isolating situation of gas of liquid and pump upstream, perhaps with under the isolating situation of the gas of pump upstream is not connected to the container that is used to collect liquid at liquid.In this gas, air vent preferably is arranged on the downstream of pump, for example in collection container.

Herein, term " upstream " and " downstream " are used for representing the position with respect to flow direction.Therefore,, this means that liquid and/or gas flow arrived primary importance or element before it arrives the second position or element if primary importance or element are said to be in the upstream of the second position or element.Similarly,, this means that liquid and/or gas flow arrived the second position or element before it arrives primary importance or element if primary importance or element are said to be in the downstream of the second position or element.

Collection container can be connected on the driver element or become whole with this driver element, and described driver element is equipped with the driving element that is used for pump.This collection container is disposable elements preferably, and this disposable elements is attached on the driver element separably.

As mentioned above, container can be arranged to the integral part of separating mechanism, and perhaps it can be arranged to separative element, and this separative element will be assembled with separating mechanism.Can be provided for collecting and the container of the transudate collected from wound of packing into.The container of several different sizes can be set,, for example, be used to improve the small volume container of motility and comfortableness, the bulk container that is used for a large amount of transudates and/or will uses by the bed user so that adapt to the different needs of different user.Container can be provided with several forms, as those skilled in the art will know.It can be arranged to the more inflexible container of box-shaped, perhaps can be arranged to use the jerrycan of making than thin material, makes this container can be crooked or folding, so that the motion that allows and follow the mobile subscriber.

In one embodiment of the invention, separating mechanism comprise have fluid inlet, the elongated separating component of fluid issuing and gas outlet.

In another embodiment of the present invention, separating mechanism is the integral part of conduit.

One or more filters preferably are arranged in the air vent or its upstream.One or more filters can be arranged on the pump head front, i.e. its upstream, and/or in its exit.For example, abnormal flavour (being deodorization) filter and/or biofilter can be set.Any other or replaceable filters can be set, comprise abnormal flavour and/or biofilter, for example one or more active carbons (carbon) filter.Filter can be hydrophobic and/or thin fat.In one embodiment, filter is placed in the pump head front.Filter can be placed in the gas outlet of separating mechanism or near this gas outlet, enter in the pump head to prevent the liquid or solid granule.In one embodiment, filter is a biofilter, and this filter is hydrophobic and preferably or dredge fat.Therefore, watery and oil-based liquid will form globule on the surface of filter.Between the normal operating period, there are enough air communication to cross filter, make through the pressure drop of filter not remarkable.

In pump head (being suction element) was releasably attached to embodiment on the driving element of pump, one or more filters can be arranged on the downstream of pump head, because pump head can easily be changed with new pump head or in order to clean or to sterilize and take off temporarily.Therefore, if pump head is isolated to the driving element of pump, then pump head can deliberately be polluted, and even under the situation of one or more filter failures, the driving element of pump is not on the line yet.

Can be included in container in the separating mechanism and can comprise at least one import and at least one outlet, described import is used for fluid and gas enters container, and described outlet is used for gas and leaves container and enter the mechanism that is used to apply negative pressure.In such embodiments, import and outlet can be arranged like this with respect to container and pump, make in the upstream of pump liquid is separated from the gas.Make gas by pump suction can the expellant gas outlet should be included in the pump or be connected on this pump.

Container can comprise absorber element, for example is used to absorb the liquid from wound suction.Absorber element can for example comprise gellant, desiccant or so-called super absorbing particles (SAP).

Pump head can be disposable or reusable, promptly uses for a plurality of patients.For example, pump head and separating mechanism can be included in the unit, perhaps are attached in the unit.Therefore, comprise the jar that is used for collecting pumping liquid or the embodiment of container, for example, pump is taken off from the driver element that has container for the emptying or the replacing of container at separating mechanism.Since detachable and disposable pump head combine with separating mechanism formation parts, so system of the present invention after having used, pump head and separating mechanism can be disposed simultaneously.This is favourable, because it makes the simpler of system handles.Simultaneously, after being used, system just reduced the danger of pump head that is used to apply the mechanism of negative pressure for different patients or user error ground.

If suction element or pump head are reusable, then preferably can be sterilized.For example, pump head can be by radiosterilization.In another embodiment, pump head can be by autoclave sterilization.In another embodiment, pump head can be by vapor sterilization.In one embodiment, pump head can utilize oxirane disinfection (ETO sterilization).In yet another embodiment, pump head can pass through cleaning and disinfecting.Pump head and driver element are reusable.By two parts of removable attachment are set, the pump head of poison or antibacterial in spite of illness might be separated with driver element, this driver element never contacts with virus or antibacterial.After pump head is taken apart with driver element, can suitably clear up, so that remove any virus or antibacterial that may be residual.In a preferred embodiment, pump head mainly comprises mechanical part, and does not have accurate electronic device.Therefore, it can both be cleared up effectively inside and outside, and does not damage the functional of pump head, and therefore makes it reusable.

Pump head can be permanently attached in the container, promptly is included in wherein non-dismountablely, perhaps can removably be attached in the container.

Driver element can comprise motor.Motor can be connected on the common power plug, perhaps can be connected on the set of cells, perhaps can be connected on the molectron of attaching plug and set of cells.When system is used for the mobile subscriber and treats, set of cells will be best.

The control unit of device can for example comprise the mechanism that is used for controlling motor.For example, the operation of motor can by control unit according to for example in the wound, in separating mechanism, in the conduit that the wound covering thing is connected to separating mechanism or the pressure determined of what its appropriate location in office determine.Motor can be operated off and on, so that pump aspirates off and on, perhaps can operate continuously under speed change.Control unit is the integral part of driver element preferably.

Aspect all four of the present invention, container can have at least one import and at least one outlet, and described import is used for fluid and gas enters container, and described outlet is used for gas and leaves container and enter in the suction element.Import and outlet can arrange like this with respect to container and suction element, makes in the upstream of suction element liquid is separated from the gas, and pump can also comprise gas outlet, makes by the gas of suction element suction to discharge from pump.

Aspect of the present invention third and fourth, container can replacedly have at least one import and at least one outlet, and described outlet is used for fluid and gas enters container, and the described outlet container that leaves for gases and liquids enters in the suction element.The outlet opening of suction element can be connected on the container, makes that the liquid by the suction element suction is transported in the container, and pump can also comprise gas outlet, makes by the gas of suction element suction and can discharge from pump.

Suction element on the pressure side can be provided for prevent that the liquid in the container from entering the structure of suction element.This structure can comprise mechanical stop mechanism, such as one or more siphons, valve or other non-return device.

Air exit can be set, gas can be discharged in the ambient atmosphere, air exit is provided with filter.

In system of the present invention, the wound covering thing can comprise semi-transparent cover foil.For example, cover foil can impermeable for the liquid that is penetrated into the cover foil outside from wound, but for vapor permeable.

Shielding body such as foam of polymers, can be arranged in the wound covering thing as open celled polymeric foam.Suitable shielding body is disclosed among the EP 0 620 720, and the document is incorporated herein by reference hereby.Replacedly, other flexible structure that transudate can be carried can be set.

As mentioned above, pressure detecting element can be set, be used for surveying at the pressure stage of system and be used for described force value is delivered to the control unit of described device.Pressure detecting element can be set, to survey in the wound covering thing or the pressure stage in the fluid collecting container of system.Pressure detecting element is being set to survey in the wound covering thing, promptly under the situation of the pressure stage of wound, the wound covering thing can be connected on the collecting chamber (chamber) such as double channel catheter via multi-cavity catheter.Multi-cavity catheter can comprise first path and alternate path, and described first path is used for applying negative pressure in the wound covering thing, and described alternate path is used for negative pressure is delivered to pressure detecting element.

Replacedly, pressure detecting element can be included in the wound covering thing or at wound covering thing place, in this case, pressure detecting element can be suitable for electronic signal is sent to the control unit of described device, for example passes through lead or wireless connections.

Can use the rinse-system that is used to irrigate.A kind of suitable rinse-system is disclosed among the WO 03/057070, and the document is incorporated herein by reference hereby.

The embodiment of device of the present invention can comprise first, second and the 3rd compartment (compartment).The mechanism that is used to apply negative pressure can comprise that motor drives suction element and motor, and described motor drives suction element and is used for producing negative pressure in therapentic part or near the wound covering thing it, and described motor is used for driving force is offered suction element.Motor is included in first compartment, and suction element is included in second compartment.Be used to collect from the container of the liquid of wound sucking-off and can comprise or be attached in the 3rd compartment, and second compartment can be detachably connected on the first and/or the 3rd compartment, and the 3rd compartment can be detachably connected on first and/or second compartment.

Therefore will understand, be used for collecting the container of liquid and suction element in order can removably to install to its replacing or cleaning.Owing to be provided with aforesaid three compartments,, and need not take off suction element or need not change suction element so container can be changed or emptying.Because suction element is compared the expensive element of constituent ratio with container, thus do not requiring under the situation of changing suction element, as long as the replacing container then the invention provides cheap pump and system.

To be appreciated that in an embodiment of the present invention, first compartment constitutes driver element, the promising suction element that makes of immediate shipment is aspirated those the required elements and the unit of assembly.As following being described in further detail, when second compartment was attached on the first and/or the 3rd compartment, suction element can connect into the driven unit driving and be connected.

In this article, should be appreciated that first, second and third compartment constitutes or comprise the case member of pump.Therefore, each compartment preferably has at least one wall part, and when the shell of the assembled formation pump of compartment, this wall part constitutes the outer wall of pump case.In each compartment, one or several sub-compartment can be set, such as container, suction cavity, motor shell etc.

Attached can the realization that each compartment can be separated from each other with many different modes.Mechanical engagement mechanism can be set, comprise for example lock bolt and/or latch-up structure, be used for each compartment fixing separably toward each other.In addition, perhaps scheme as an alternative can be provided with magnetic force mechanism.

As mentioned above, suction element can for example comprise piston or barrier film, and first compartment can comprise that to make suction element reciprocating or cause those elements that suction action is required thus.Preferably, the close and/or gas-tight seal of liquid is set between suction element and driver element, enters in the driver element so that prevent gas and/or liquid.For example, comprise such as piston or membranous pump head and can seal, lean against on the wall dividing plate along periphery.Can avoid driver element to pollute thus, perhaps can reduce the danger that driver element pollutes.Therefore, owing to when pump will use for another patient, change the 3rd compartment usually, in the middle of the use of device, have only the pump head of second compartment to need sterilization for different patients with container.Replacedly, second compartment can be disposable, and therefore, when pump can be changed it when a patient moves to another patient.

First, second and the 3rd compartment can be arranged by various structures.For example, compartment can have the ordinary rectangular cross section, makes the first surface maintenance of second compartment and the flush of the first and/or the 3rd compartment.The second surface of second compartment relative with first surface can keep with the first and the 3rd compartment in another flush.Replacedly, each compartment can be a common cheese or arcual.For example, each compartment can form cheese or the arch-shaped elements of crossing over about hexagonal angle degree, makes each compartment contact two in other compartment.Easily, second compartment directly is attached on first compartment, makes second compartment cooperate with the driving that the motor of first compartment drives to the attached generation suction element of first compartment.

As a kind of safety measure, compartment can be constructed like this, promptly has only when the 3rd compartment second compartment when first and/or second compartment is pulled down and just can pull down from first compartment.Therefore, during from therapentic part pumping liquid and other material, can avoid pulling down suction element at equipment.In one embodiment, when the 3rd compartment was attached on second compartment, the lock bolt that is used for separating from first compartment second compartment was covered by the 3rd compartment.In another embodiment, the electronic control mechanism that comprises for example one or more switches and/or light emitting diode is set, whether in place to survey the 3rd compartment, and if in place, then prevent to take off second compartment.

Pump only can be configured to gas pumping by suction element and/or therefrom by intake-gas and liquid.In first alternative, container has at least one import and at least one outlet, described import is used for liquids and gases and enters container, described outlet is used for gas and leaves container and enter suction element, import and outlet are arranged like this with respect to container and suction element, make liquid separate with the gas of suction element upstream.In such an embodiment, pump also comprises gas outlet, makes by the gas of suction element suction to discharge from pump.In this embodiment, can prevent from the fluid of wound suction at least basically and may also have solid matter to enter the pump, the danger that can avoid wearing and tearing and pump to pump to block thus.

In other alternative, suction element has at least one import and at least one outlet, described import is used for liquids and gases and enters suction element, described outlet is used for liquids and gases and leaves suction element, the outlet opening of suction element is connected on the container thus, makes the liquid that aspirates by suction element be transported in the container.In such an embodiment, pump also comprises gas outlet, makes by the gas of suction element suction to discharge from pump.This embodiment goes for the application scenario of the clog-free danger of element of pump.

Will appreciate that from the above description suction element can preferably be attached in second compartment.Preferably, the reciprocating motion by suction element causes that the suction cavity of pucker ﹠ bloat also is attached in second compartment fully.Therefore can realize preventing to aspirate material and enter and pollute first compartment, this first compartment is equipped with the driven unit of pump.

Though, preferably, gas outlet is located in the second or the 3rd compartment for first compartment of avoiding polluting the driven unit that pump is housed can be provided with gas outlet in any of compartment.As described in following, one or more filters can be set.

In certain embodiments, wherein, suction element comprises pump head, passes through this pump head from therapentic part intake-gas and/or liquid during pump operated, between the pump head and first compartment, liquid and/or air seal are set preferably, enter first compartment so that prevent gas and/or liquid.Sealing can for example be leaned against to seal on second compartment by suction element and reach, and described suction element for example is made of barrier film or piston.Make that the suction cavity of second compartment is sealed when being attached on the first and/or the 3rd compartment with the operation configuration, be discharged to first compartment from second compartment to prevent aspirate matter.

Replacedly, suction element can comprise the wriggling element, and the continuous pucker ﹠ bloat of the flow cross section of this wriggling element by being contained in the pipe in second compartment applies negative pressure.The pucker ﹠ bloat of pipe can for example be realized by pivo table member, this pivo table member has one or more ledges that act on tube outer surface, the flow cross section that makes pipe thus is pucker ﹠ bloat in succession, this pivo table member is included in first compartment, is perhaps driven by the driven unit in first compartment at least.

Can be provided for surveying the pressure detecting element of the negative pressure in the wound covering thing.Replacedly or in addition, can be provided for surveying the pressure detecting element of the negative pressure in container.This pressure detecting element can be connected on the control unit of operation of control pump motor, to guarantee keeping required negative pressure at therapentic part.In one embodiment, pressure detecting element can be arranged in first compartment.Therefore, the existence of pressure detecting element can not make in most of embodiment that to be that the second and the 3rd compartment of disposable elements becomes unnecessarily expensive.

Under pressure detecting element was located at situation in first compartment, near this pressure detecting element can be arranged in and run through the place, end of catheter pressure of second compartment or its to small part, making did not need isolating outer conduit or pipe to enter first compartment.This can reduce will assembled components quantity, is convenient to the operation of pump, and reduce the danger that first compartment pollutes.

Catheter pressure can lead to container or lead in the pressure input port of the second or the 3rd compartment.In the latter's alternative, the pressure input port can be connected on the therapentic part, for example is connected on the wound that is covered by the wound covering thing, and in this case, pressure detecting element is surveyed the pressure of therapentic part.Equally, the pressure in can other parts of detection system.In the first replaceable scheme, the pressure in the pressure detecting element exploration vessel, this pressure can equal or represent at least the pressure of therapentic part.

In other embodiments, pressure detecting element is arranged in second compartment.

Pump can also comprise airtight basically and/or the close barrier layer of liquid, is used to prevent will be described in further detail below by the gas of pressure detecting element and/or liquid contamination.

In the present invention, but deflection piece (deflectable member) can arrange like this with respect to the closure that is formed by the wound covering thing, but makes the pressure reduction between ambient pressure and the negative pressure that applied by the mechanism that is used to apply negative pressure can cause deflection piece deflection.Pressure-detecting device can be positioned at the closure outside that is formed by the wound covering thing, but and be arranged to provide signal in response to the deflection of pressure or deflection piece, but deflection piece forms gastight basically barrier layer between pick off and closure.

Therefore, provide some systems, wherein, but deflection piece separates pressure-detecting device with transudate in closure.

But because not only deflection and be convenient to gaging pressure thus of deflection piece, but also pressure-detecting device is separated with transudate, thus the danger that driver element pollutes reduced, and make checkout gear can reuse repeatedly and need not sterilize.Therefore, when increasing safety, can reduce cost.Preferably, but deflection piece forms the barrier layer to antibacterial, virus, gas and liquid.

Pump can comprise at least one disposable unit and at least one durable (promptly reusable) parts, and described disposable unit comprises the container that for example is used to collect from the liquid of wound suction, and described durable components comprises the driven unit that for example is used for pump.In such embodiments, pressure-detecting device preferably is arranged in the durable components, but and deflection piece preferably is arranged in the disposable unit, not only reduced cost but also reduced risk of pollution thus.

Usually, but wound covering thing deflection piece and other assembly of the contaminated system of possibility can be disposable during treating, and this means, assembly is designed to use in the short time cycle with respect to the reusable driver element of for example primer pump.When placing the wound covering thing, on wound location, can form gas-tight seal basically, to prevent vacuum leak.Covering is placed on forms a kind of like this sealing on the wound, make covering adhere on the healthy skin of wound location, originally keep gas-tight seal on one's body at wound simultaneously.In this article, " airtight " and " airtight basically " should be understood to and be meant at least and can keep negative pressure in the operating period of pump on wound.

But deflection piece should be preferably gastight basically, and prevent that thus antibacterial and transudate from spreading by barrier film usually.But deflection piece can be made by the material that air and other gas are not significantly seen through.Because the polymer that in the long term gas is not seen through fully so term used herein " does not significantly see through " expression, is being insignificant with the osmosis during the deflection piece seance for measurement.But deflection piece can not see through antibacterial especially basically.Antibacterial has the diameter of about 0.2 μ m usually.Therefore, the barrier layer can not see through basically to the granule greater than 0.02 μ m, to reach about 10 factor of safety.But deflection piece also can be by virus penetration, and therefore plays the effect on barrier layer between single environment for use and surrounding.Although can not passing, size little (20-300nm) virus resembles the solid material that does not see through deflection piece and so on.An example of material is the acrylonitrile-butadiene rubber of using for the laboratory glove.But deflection piece can be made by flexible polymeric materials.The plastic material of PE, PP and PVC and so on be can select to resemble,, and injection-molded or blown-moulding are suitable for because these materials are cheap usually.But deflection piece also can be by the material that is selected from following kind, comprising: thermoplastic elastomer (TPE) (TPU, SIS, SBS and SEBS), resemble thermosetting or vulcanized elastomer, latex, glass, metal and the pottery of synthetic and natural rubber and so on.Under any circumstance, but deflection piece should be designed to deflection when the pressure reduction of above-mentioned scope, i.e. 10-600mmHg, and even in the scope of 10-200mmHg.

But equally also show the embodiment that is used for suction element (being pump head) about the present item of considering of the embodiment of deflection piece and requirement thereof, such as the pipe that supplies in peristaltic pump, to use, for the barrier film of in membrane pump, using or for the piston of in piston pump, using.Usually, the principle of deflection can based on:

I) elastic expansion of thin film, or

But the ii) change of the shape of deflection piece, i.e. for example bending by material, such as by elastic bending, or

Iii) but deflection piece element is with respect to the motion of another element.

Ad i) if deflection based on elastic expansion, then but deflection piece can comprise relatively thinner thin film or barrier film, for example stretch on the beginning that stretch on the encapsulation or at pipe or stretch at interval and therefore form the balloon or the barrier film of flexible wall in the cylinder etc. on disks at two or more, but deflection piece is communicated with the closure fluid.

If Ad ii) deflection based on the bending of material, but then deflection piece can comprise the bellow-shaped part that can expand and shrink according to pressure reduction in one direction, but perhaps deflection piece can comprise Bourbon pipe, promptly changes the pipe of its shape according to internal pressure.

If Ad is iii). deflection is based on the element that moves relative to each other, and then element can be included in " rolling diaphragm " or piston and cylinder assembly or the liquid string (string) in the pipe.

Irrelevant with the principle of deflection, for the degree of deflection of certain pressure reduction, but the resistance that can deflection piece overcomes deflection can perhaps be controlled by the separating force that the structure that influence deflection is set by the size Control of the character deflection piece of selecting material.As a kind of like this example of structure, spring can be set, for example the spiral disc spring influences deflection.

But deflection piece can use with two kinds of different modes:

A) as Passive part, its deflection and without any remarkable resistance, and only as the hermetic barrier between closure and the pressure-detecting device, perhaps

B) as driving link, its deflection is surveyed with pressure balance in the wound closure and by checkout gear, and therefore, but deflection piece is the part of pressure-detecting device.

But Ad a) deflection piece on measuring guide or cell are connected to pressure transducer on the sidepiece relative with closure.Because but the deflection piece motion does not have remarkable resistance or the deflection of almost unstressed ground, so but it will occupy the position that reaches uniform pressure in the both sides of deflection piece, and make pressure to measure exactly with the pressure transducer of any known kind by the barrier layer.

Usually, pick off can comprise the pick off of any kind, and this pick off can be measured the pressure reduction of mentioned kind.For example, pick off can comprise the element that is selected from following kind:

-strain gauge element,

-piezoresistance element,

-piezoelectric element,

-Bourbon pipe,

-MEMS (MEMS or solid state MEMS),

-vibrating elements (silicon resonance),

-variable-capacitance element and

-little Pirani ga(u)ge.

Ad b) pressure-detecting device can be positioned at the closure outside, but and is suitable for providing signal according to the deflection of deflection piece.Usually, checkout gear can be an any kind, and it can measurement size, distance, deflection, motion or power.

But the detection principle of using can be based on contacting between checkout gear and the deflection piece, i.e. contact measurement, and perhaps it can be with direct contact measurement, i.e. noncontacting measurement.

The checkout gear that is used for contact detection can comprise the element that is selected from following kind:

-piezoresistance element,

-piezoelectric element,

-vibrating elements (silicon resonance),

-variable-capacitance element and

The mechanical measurement of-deflection, for example adopt:

-strain gauge element,

-linear movement position sensor,

-potentiometer,

-force transducer, or

-Li sensitive resistor element (FSR).

Noncontacting measurement can based on:

-ultrasonic reflections,

-reflected light (IR-LED/ laser diode),

-triangulation (IR-LED/ laser diode and PSD-position detecting device),

-differential variable-reluctance transducer (having iron core in DVRT or the LVDT-coil).

Under any circumstance, signal is the signal of telecommunication preferably, and sort signal can be used for monitoring negative pressure and/or control pump in the closure through reading instument or display, so that required negative pressure to be provided.

The cost of pick off or checkout gear is compared often higher with the cost of disposable assembly.And disposable sensor comprises electronic unit that needs power supply and the mechanism that is used to pass the signal to durable (reusable) display or control unit.Therefore, can be advantageously, but checkout gear is separated with deflection piece, but and therefore make deflection piece energy after each the use processed.So but deflection piece preferably can be detachably connected on the pressure transducer by sealing means, perhaps can be arranged to engage contact detecting apparatus or for example be bonded on the tram, but this hasp connected system is convenient to deflection piece in an easy manner and is correctly located with respect to checkout gear by the hasp connected system with respect to the noncontacting measurement device.In order to guarantee correct measurement, can arrange connected system, prevent the use of pump, unless but the position of deflection piece is correct with respect to pick off.

In one embodiment, but deflection piece forms the wall part of wound covering thing, perhaps forms the componentry that is communicated with the closure fluid, for example forms from the part of the pipe of closure extension.

But deflection piece can form the part of wound covering thing, but perhaps deflection piece can form the wall part of the pressure signal conduit that is communicated with the closure fluid.The pressure signal conduit makes the pick off can be away from the wound setting, and pick off can be included in the driver element that is used for primer pump thus.

The pressure signal conduit can be formed or be embedded wherein by medical pipe.In one embodiment, pipe forms several chambeies, and wherein, a chamber forms the pressure signal conduit, and another chamber forms discharge tube.As the alternative that multi-lumen tube is used, pressure signal conduit and discharge tube can be formed by single medical pipe, and each pipe can engage, and the processing that is used for strengthening system strengthens being connected of wound covering thing, pump and pressure transducer with being used for.For the further connection of reinforcing member, multi-lumen tube or single lumen catheter can comprise coupling mechanism, and this coupling mechanism is connected to pump on the discharge tube and with the pressure signal conduit in coupling action once and is connected on the pick off.Similarly, can obtain separating by two pipes of single separating action.

Because the opposite only sending pressure signal of signal catheter, rather than fluid, do not handle and enter in the pressure signal conduit so resemble the liquid substance of transudate and so on discharge tube.Yet in order to strengthen the reliability of system, signal catheter can form the import that enters closure, and this import comprises the isolating construction that prevents liquid substance and transudate entering signal conduit.This isolating construction can for example be the highly flexible barrier layer, but for example above-mentioned deflection piece or second " unstressed " but deflection piece.

But in order to provide fast and the deflection or the motion of accurate signal transmission and restriction deflection piece, preferably, provide the conduit of the pressure signal with smaller size smaller, preferably less than the volume of discharge tube.Therefore, signal catheter can preferably have the little cross-sectional area of brake specific exhaust emission conduit.

In one embodiment, but deflection piece is the stressless basically deflectionable part that is connected to measuring guide, and checkout gear is a pressure transducer.

In another embodiment, but deflection piece comprises stressless basically deflectionable part and the spring structure that power is provided, but this structure can be the integral part or the resolution element of deflection piece, and checkout gear is contactless range sensor.

Description of drawings

Embodiment of the present invention will be described referring now to accompanying drawing, in the accompanying drawings:

Fig. 1 and 2 is the sketch map of first embodiment of negative pressure system of the present invention;

Fig. 3 represents the lateral perspective view from the embodiment of the separating mechanism of an aspect of of the present present invention;

The perspective bottom view of separating mechanism in Fig. 4 presentation graphs 3;

The perspective side elevation view of the driver element of the embodiment of separating mechanism, pump head and container in Fig. 5 presentation graphs 3;

Fig. 6 represents another embodiment of separating mechanism and conduit, and wherein, separating mechanism and catheter combination are in a unit;

Fig. 7-the 12nd, the cross section of the embodiment of the device of first aspect present invention;

Figure 13 and 14 is the cross section of embodiment of the pump of third aspect present invention;

Figure 15 briefly shows system of the present invention;

But Figure 16 briefly shows pressure transducer and deflection piece;

But Figure 17-28 briefly shows deflection piece and with respect to the various embodiment of the position of checkout gear.

The specific embodiment

Fig. 1 represents the first embodiment of the present invention, and wherein, wound covering thing 1 is connected on the separating mechanism 4 via fluid inlet 3 by conduit 2, and this separating mechanism 4 comprises container 10.Separating mechanism is separated from the gas with liquid, and therefore has only gas to flow through gas outlet 5 to pump head 6 basically.In this embodiment, isolating liquid and presumable solid matter are collected in the container 10.Driver element 8 drives pump head 6, and the system that makes provides negative pressure.Pump head 6 also comprises outlet 7 and filter 9.

Fig. 2 represents the second embodiment of the present invention, and wherein, pump head 6 combines with separating mechanism 4, to form a unit.For example, pump head 6 can be incorporated in the container 10.

Fig. 3 represents from the lateral perspective view of an embodiment of separating mechanism 4.

The perspective bottom view of separating mechanism in Fig. 4 presentation graphs 3.In this embodiment, separating mechanism 4 comprises the elongated portion with second fluid inlet 12, fluid issuing 11 and second gas outlet 13.Fluid issuing 11 is placed between second fluid inlet 12 and second gas outlet 13.When the fluid from wound flow through second fluid inlet 12, they then were separated into liquids and gases, and described flow of liquid is crossed fluid issuing 11 and entered in the container (not shown), and described gas flows through second gas outlet 13.Separation energy realizes by means of gravity, make liquid fall by fluid issuing 11, and gas proceeds to second gas outlet 13.

Fig. 5 is expressed as the perspective side elevation view of the driver element 8, pump head 6 and the container 10 that hold the embodiment of separating mechanism 4 among Fig. 3.End face center at driver element 8, pump head 6 and container 10 is provided with recess, with the separating mechanism 4 that holds Fig. 4.Pump head 6 be provided with intake-gas inlet 13 ', provide and be provided with this gas access 13 ' so that corresponding with the gas outlet 13 of separating mechanism.Container 10 be provided with the fluid issuing 11 corresponding fluid inlets 11 of separating mechanism 4 '.

Fig. 6 represents another embodiment of separating mechanism 4 and conduit 2, and wherein, separating mechanism 4 and conduit 2 are combined in the unit.In this embodiment, separating mechanism 4 and conduit 2 are arranged to a pipe, and this pipe comprises second fluid issuing 15 and the 3rd gas outlet 16 in section far away.Fluid is separated into liquids and gases to finish with the similar mode of embodiment shown in Fig. 3-5.In another embodiment, filter is placed in fluid inlet 11 ' front, does not have liquid to enter pump head 6 so that guarantee.

Can be applied to reference in the described system of Fig. 1-6 below with reference to the described pump configuration of Fig. 7-14 and with reference to the described pressure detection structure of Figure 15-28.

Fig. 7 and 8 is sectional elevations of two vertical planes of the device embodiment of first aspect present invention.Device comprises three compartments, i.e. first compartment 101, second compartment 102 and the 3rd compartment 103.As following being described in further detail, first compartment 101 is equipped with the suction element that makes second compartment 102 driven unit from the wound suction transudate.The 3rd compartment 103 comprises the collection container 105 that is used to collect from the liquid of wound suction.

The 3rd compartment 103 removably is attached on second compartment 102, and second compartment 102 removably is attached to again on first compartment 101.Each compartment is dismantled fixing can for example the realization by one or more lock bolts toward each other, such as any molectron of the moving partially lock bolt of spring, magnetic force mechanism, one or more lock or said mechanism.In order to prevent that second compartment 102 from by mistake taking off from first compartment 101, can on that surface of compartment 102, release-push or release-push be set, be used for second compartment is separated from its detachable coupling with first compartment 101, when the 3rd compartment 103 was attached on second compartment 102, the surface of compartment 102 was in abutting connection with the 3rd compartment 103 and it can not be entered.

Electronic control unit can be set, to guarantee that three compartments do not separate when pump is operated.For example, if by pressure detecting element 132 measure in container 105 and/or the negative pressure in the wound be higher than a certain threshold value, then Magnet by electronic operation or lock the 3rd compartment 103 is separated with second compartment 102 and/or with first compartment 101 can be changed into impossible.Replacedly, operating if be used for the motor 116 of driving pump, if perhaps pump is starting, then compartment can be interlocked by control unit.

Second compartment 102 comprises reciprocating disposable barrier film 104, and this barrier film 104 forms the wall dividing plate of the second compartment outer surface.Barrier film 104 leans against on the outer surface of second compartment 102 along periphery close and air tight manner sealing with liquid.When barrier film 104 moves back and forth, suction cavity 106 is expanded and contraction, pump-absorb action is provided thus.In the suction import of cavity 106 and exit or its, be provided with corresponding first and second check valves 108,110.When suction cavity 106 expanded, second valve 110 kept cutting out, and first valve 108 is opened.When suction cavity 106 shrank, first valve 108 cut out, and second valve 110 is opened.

First compartment 101 is equipped with fixedly barrier film 112, and this barrier film 112 is connected to respect on the motor 116 eccentric drive rods of installing 114.Barrier film 112 along peripheral attachment on the outer surface part of first compartment 101.In a preferred embodiment, barrier film 112 also is sealed on the outer surface part of first compartment 101, makes the cleaning of the outer surface part of first compartment become more convenient thus.The disposable barrier film 104 of second compartment 102 forms the periphery sealing in addition, leans against on the outer surface part of fixing barrier film 112, makes middle cavity 118 can be enclosed between two barrier films.Yet, should be appreciated that during pump operated

barrier film

104 and 112 is usually each other facing to keeping flat, so very close to each other basically between the two.Make drive rod 114 and make fixedly barrier film 112 reciprocating motions thus by rotatablely moving of motor generation.Fixedly the reciprocating motion of barrier film 112 moves back and forth disposable barrier film 104, and suction cavity 106 is expanded and contraction.

The inlet hole 120 that is used for pump runs through second compartment 102, and leads to the collection container 105 of the 3rd compartment 103.Be used for the downstream that deflated outlet opening 122 is located at pump.Outlet opening 122 also runs through second compartment 102, and leads to the 3rd compartment 103.In outlet opening 122 on being in the 3rd compartment 103 that part of, be provided with abnormal flavour filter 124 and biofilter 126.

Usually advantageously, still be that the downstream can be provided with any filter in the 3rd compartment regardless of upstream at suction cavity 106.Therefore, when changing the 3rd compartment, new filter is set, has prolonged the life-span of second compartment 102 thus.

The swabbing action that is produced by the reciprocating motion of barrier film 104 forms negative pressure in the collection container 105 of the 3rd compartment 103.Collection container 105 is connected on the wound (not shown) via discharge tube 128, produces negative pressure in wound location thus.Catheter pressure 130 is set, with the pressure port of the 3rd compartment 102,103 wound location is connected with pressure detecting element 132 through running through second.But deflection piece 132* preferably is set, but is somebody's turn to do deflection piece 132*, promptly between pick off 132 and wound closure (not shown), form hermetic barrier basically in the upstream of pick off 132.But deflection piece and pressure transducer 132 can as following with reference to Figure 15-28 described concrete enforcement.

Conduit

128 and 130 can be made of multi-lumen tube easily, such as double lumen tube.Yet also imagination can be provided with two isolating pipes to two conduits, and in these two conduits, catheter pressure can directly extend in second compartment 102, and even directly extends in first compartment 101.Yet the danger for the element (comprising pressure transducer 132) that reduces to be contained in first compartment 101 is polluted preferably is connected to pressure on the second or the 3rd compartment.

The improvement embodiment of pump in Fig. 9-12

presentation graphs

7 and 8 wherein, is provided with wall 136 (Fig. 9 and 10) and 138 (Figure 11 and 12), sucks from the top of container 105 to guarantee gas.

In the embodiment of Figure 13 and 14, wall 140 is arranged in the 3rd compartment, to form discharge tube 128 is connected to path in the pump inlet 120.Therefore, from any material of wound suction, comprise that liquid is drawn through suction cavity 106.Therefore, delivery side of pump hole 122 is set, liquids and gases is discharged in the collection container 105 of the 3rd compartment 103.In this embodiment, comprise that the air vent of abnormal flavour filter 124 and biofilter 126 makes collection container 105 be connected with outside, so that gas can be discharged from the container.

Figure 15 represents to comprise the suction system 201 of wound covering thing 202, and this wound covering thing 202 is attached to the periphery of wound 203 and therefore forms closure 204.Discharge tube 205 is called on the suction structure of pump head 206 below closure 204 is connected to, and pressure signal conduit 207 is communicated with closure 204 fluids through import 208.But axial opposite end 209 usefulness deflection pieces 210 sealing of pressure signal conduit 207, but should deflection piece 210 prevent that the transudate in the closure from discharging, and therefore protect pick off 211 to avoid polluting.In Figure 15, but the just schematically expression of deflection piece and pick off.But the pressure in closure 204 and around the pressure reduction between the pressure in the space 212 cause the deflection of deflection piece 210, and pick off 211 is suitable for determining this deflection and determines pressure reduction thus.The motor case that is called driver element 213 below pick off 211 is arranged in, this driver element 213 also is equipped with power-driven mechanism, is used for starting pump head 206 through drives structure 214.Driver element also comprises the battery that is used for portable self-powered use.But deflection piece 210 is detachably connected to driver element 213 and is thus connected on the pick off 211.As illustrational, pressure signal conduit 207 has the little cross sectional dimensions of brake specific exhaust emission conduit 205.

Liquid and other transudate 215 of discharging are discharged into the reservoir 216 from pump head 206, and suction gas is discharged in the surrounding space 212 by filter 217 and outlet 218.Filter prevents the environmental bacteria pollution, and also can prevent abnormal flavour.

But Figure 16 represents pressure signal conduit 207 and is attached to the details of deflection piece 219 and pick off 220 under the situation on the pick off.But deflection piece 219 has bellows form, and at this moment this corrugated tube promptly changes shape for the pressure reduction between the atmospheric pressure according to negative pressure in the closure 204 and the pressure in the surrounding space.When negative pressure reduced, bellow-shaped partly shortened, and the length that shortens is detected by pick off 220.Dotted line is illustrated in the bellow-shaped part under the extension state, and solid line is represented compressive state.

But Figure 17 a represents to be positioned at the side view of the deflection piece on the closure.Reference numeral 221 expression wound covering things, Reference numeral 222 expressions are arranged in the dust collecter of closure, and encapsulation is measured in Reference numeral 223 expressions, and Reference numeral 224 is measuring tubes, and Reference numeral 225 is suction tubes.Figure 17 b represents the identical embodiment from the vertical view of measuring encapsulation, measures in encapsulation at this, and corrugated tube 226 is according to pressure reduction and deflection.

Figure 18 a represents that distance sensor connects.Reference numeral 227 expression measuring chambers, and Reference numeral 228 expression pick offs.Figure 18 b represents to have pipe and connects 229 alternative embodiment, and this pipe connects 229 and guides measurement point into.To be appreciated that, but Figure 18 a and 18b do not represent deflection piece, and only represent sensor configuration.

But Figure 19 represents to be the deflection piece of moving piston 230 forms in the cylinder 231, and cylinder 231 is connected on the measuring tube 232.

Figure 20 express liquid piston 233, this piston 233 moves according to pressure reduction in measuring tube 234.

But Figure 21 represents to be the deflection piece that barrier film is positioned at the form on the distance sensor.Reference numeral 235 expression measuring tubes, Reference numeral 236 expressions have the shell of barrier film 237, Reference numeral 238 expression snap fit, Reference numeral 239 expression measuring chambers, and Reference numeral 240 expression pick offs.

But Figure 22 represents to be the deflection piece that corrugated tube is positioned at the form of pick off front.Reference numeral 241 expression measuring tubes, Reference numeral 242 expression snap fit, Reference numeral 243 expression measuring chambers, and Reference numeral 244 expression pick offs.

But Figure 23 is illustrated in the deflection piece in disposable pump head or the waste canister.Reference numeral 245 expression pump head or waste canisters, Reference numeral 246 expression driver elements, Reference numeral 247 expression pick offs, and Reference numeral expression separating and measuring chambers 248.

Figure 24 represents the contact measurement with shell 249, and this shell 249 comprises shell is connected to path 250, barrier film 251, spring base 252 and spring 253 and potentiometer 254 on the closure.Potentiometer joins barrier film to, and so diaphragm movement by being in direct contact with it.

Figure 25 represents to carry out the replaceable mode of contact measurement.In this embodiment, the susceptiveness of secondary spring 255 generators in the single use portion, and auxiliaryly provide the contact of potentiometer with respect to deflection piece than weak spring 253 is so that potentiometer pursuit movement and needn't engaging between two.

Figure 26 represents the noncontacting measurement with range sensor.Reference numeral 256 expression shells, Reference numeral 257 expressions are connected to path on the closure, Reference numeral 258 expression barrier films, Reference numeral 259 expression pick offs, and the spring of Reference numeral 260 expression generator susceptivenesss with shell.

Figure 27 represents the noncontacting measurement with magnetic resistance.Reference numeral 261 expressions have the shell of barrier film 262 and path 263, and described path 263 is connected to shell on the closure, and Reference numeral 264 is springs, and Reference numeral 265 is unshakable in one's determination, and Reference numeral 266 is coils.

But Figure 28 represents the noncontacting measurement with deflection piece, but described deflection piece is arranged in disposable jar or catcher that transudate is used.Reference numeral 267 expressions have the jar of transudate 268, Reference numeral expression separating and measuring chambers 269, Reference numeral 270 expression windows, Reference numeral 271 expression pick offs, and Reference numeral 272 expression driver elements.

Claims

1. one kind promotes the device of wound healing with the wound covering thing, and this device comprises:

-separating mechanism, it comprises fluid inlet and gas outlet,

-being used to apply the mechanism of negative pressure, it comprises pump head and driver element,

-described pump head is connected in the gas outlet of separating mechanism, and wherein, pump head removably is attached on the driver element,

Thereby in use, the fluid inlet of separating mechanism for example is connected on the wound covering thing through conduit.

2. device according to claim 1, wherein, the mechanism that is used to apply negative pressure comprises membrane pump.

3. according to each described device among the claim 1-2, wherein, driver element comprises motor.

4. according to each described device among the claim 1-3, wherein, pump head is disposable.

5. according to each described device among the claim 1-4, wherein, separating mechanism and pump head are included in the unit.

6. according to each described device among the claim 1-4, wherein, system comprises filter.

7. device according to claim 6, wherein, filter is arranged at the pump head front.

8. device according to claim 6, wherein, filter is placed in the exit of pump head.

9. according to each described device among the claim 1-8, wherein, driver element is provided with control unit.

10. device according to claim 9, wherein, control unit is the integral part of driver element.

11. according to each described device among the claim 1-10, wherein, pump head is reusable.

12. according to each described device among the claim 1-11, wherein, pump head can be sterilized.

13. according to each described device among the claim 1-12, wherein, separating mechanism comprises container.

14. device according to claim 13, wherein, container has:

-at least one is used for the import that liquids and gases enter container; With

-at least one is used for gas and leaves the outlet that container enters the mechanism that is used to apply negative pressure;

Described import and outlet arrange like this with respect to the mechanism that container and being used to applies negative pressure, that is, make in the upstream of the mechanism that is used to apply negative pressure liquid is separated from the gas;

The mechanism that is used to apply negative pressure also comprises gas outlet, and this gas outlet is used for making by the gas of the mechanism's suction that is used to apply negative pressure and can discharges from pump.

15. according to claim 13 or 14 described devices, wherein, container comprises absorber element.

16. according to claim 13 and former arbitrary other described device in the claim, this device comprises first, second and the 3rd compartment, wherein, the mechanism that is used to apply negative pressure comprises:

-motor drives suction element, is used for producing negative pressure in the wound covering thing of therapentic part or its vicinity; With

-motor is used for driving force is offered suction element, and described motor is included in described first compartment, and suction element is included in second compartment;

Described container is comprised or is attached in the 3rd compartment that second compartment is detachably connected on the first and/or the 3rd compartment, and the 3rd compartment is detachably connected on first and/or second compartment.

17. device according to claim 16, wherein, have only when the 3rd compartment from first/and second compartment when pulling down, second compartment just can be pulled down from first compartment.

18. according to claim 16 or 17 described devices, wherein, container has:

-at least one is used for gas and leaves the outlet that container enters suction element;

Described import and outlet are arranged like this with respect to container and suction element, make in the upstream of suction element liquid is separated from the gas;

Described device also comprises gas outlet, makes by the gas of suction element suction to discharge from pump.

19. according to each described device among the claim 16-18, wherein, suction element has:

-at least one is used for the import that liquids and gases enter suction element; With

-at least one is used for the outlet that liquids and gases leave suction element;

Thus, the outlet opening of suction element is connected on the container, thereby is transported in the container by the liquid of suction element suction;

20. according to each described device among the claim 16-19, wherein, suction element is incorporated in second compartment.

21. according to each described device among the claim 16-19, wherein, gas outlet is located in described second compartment.

22. according to each described device among the claim 16-19, wherein, gas outlet is located in described the 3rd compartment.

23. according to each described device among the claim 16-22, wherein, suction element comprises pump head, during pump operated, pass through this pump head from therapentic part intake-gas and/or liquid, between the pump head and first compartment, be provided with the close and/or gas-tight seal of liquid, enter first compartment so that prevent gas and/or liquid.

24. according to each described device in the former claim, this device also comprises pressure detecting element, is used to survey the negative pressure in the wound covering thing.

25. according to arbitrary other described device in claim 13 and the former claim, this device also comprises pressure detecting element, is used for surveying the negative pressure at container.

26. according to claim 24 or 25 described devices, wherein, pressure detecting element is located in first compartment.

27. device according to claim 26, wherein, pressure detecting element be arranged in to small part run through second compartment catheter pressure the end or near.

28. device according to claim 27, wherein, described catheter pressure leads to container.

29. device according to claim 27, wherein, described catheter pressure leads to the pressure input port of the second or the 3rd compartment.

30. according to claim 24 or 25 described devices, wherein, pressure detecting element is located in second compartment.

31. according to each described device among the claim 24-30, this device also comprises airtight basically and/or the close barrier layer of liquid, is used to prevent by the gas of pressure detecting element and/or liquid contamination.

32. according to each described device among the claim 16-31, wherein, second compartment comprises lock bolt, is used for pulling down second compartment from first compartment, lock bolt is maccessiable when the 3rd compartment is attached on second compartment.

33. a system that is used to promote wound healing, it comprises according to each a described device among the claim 1-32 and a wound covering thing.

34. system according to claim 33, wherein, the wound covering thing comprises semi-permeable cover foil.

35. according to claim 33 or 34 described systems, this system also is included in the flexible structure that is used to carry transudate in the wound covering thing.

36. system according to claim 35, wherein, described flexible structure comprises foam of polymers.

37. system according to claim 36, wherein, described foam of polymers comprises open celled polymeric foam.

38. according to each described system among the claim 33-37, this system also comprises pressure detecting element, this detecting element is used for the stress level of detection system and is used for described force value is delivered to the control unit of described device.

39. according to the described system of claim 38, wherein, pressure detecting element is arranged to be used to survey the interior pressure stage of wound covering thing.

40., wherein, arrange that pressure detecting element is arranged to be used for the interior stress level of fluid collecting container of detection system according to the described system of claim 38.

41. according to each described system among the claim 38-40, but this system comprises deflection piece, but should arrange like this with respect to closure by deflection piece, but make the pressure reduction between ambient pressure and the negative pressure that applies by the described mechanism that is used to apply negative pressure can cause deflection piece deflection, wherein, pressure-detecting device is positioned at the outside of the closure that is formed by the wound covering thing, but and be arranged to be used for providing signal in response to the deflection of pressure or deflection piece, but deflection piece forms gastight basically barrier layer between pick off and closure.

42. according to the described system of claim 41, wherein, but deflection piece can removably join detecting element to.

43. according to claim 41 or 42 described systems, wherein, but deflection piece is removably mounted on the fixed position with respect to detecting element.

44. according to each described system among the claim 41-43, wherein, but deflection piece forms the part with closure and the isolating wall of surrounding space.

45. according to each described system among the claim 41-44, wherein, but deflection piece forms the wall part of the pressure signal conduit that is communicated with the closure fluid.

46. according to the described system of claim 45, wherein, the pressure signal conduit forms the import enter closure, this import comprises and prevents that liquid substance from entering the isolating construction of pressure signal conduit.

47. according to claim 45 or 46 described systems, this system is included between closure and the mechanism that is used to apply negative pressure and forms the discharge tube that fluid is communicated with, described discharge tube and pressure signal catheter-shaped become a single elongated member.

48. according to the described system of claim 47, wherein, the pressure signal conduit has the little cross-sectional area of brake specific exhaust emission conduit.

49. according to each described system among the claim 41-48, wherein, the mechanism that is used for applying negative pressure is contained in pump case, this pump case also is equipped with pick off and coupled structure, but this coupled structure is used for fixing deflection piece with respect to pick off on operating position.

50. according to the described system of claim 49, wherein, coupled structure also is suitable for discharge tube is connected to the mechanism that is used to apply negative pressure.

51. according to the described system of claim 50, wherein, the interaction that coupled structure is adapted to pass through unique user separates discharge tube and pressure signal conduit with pump case.

52. according to each described system among the claim 49-51, wherein, pump case is divided into pump head and driver element, described pump head comprises suction structure, and this suction structure can be connected on the discharge tube; Described driver element is equipped with the power-driven mechanism that is used to start the mechanism that applies negative pressure and can be connected to the pressure signal conduit, and the mechanism that is used to apply negative pressure comprises the pump head that can be detachably connected on the driver element.

53. according to each described system among the claim 41-52, this system comprises that the structure that is used for applying negative pressure according to pressure signal control is to provide the control structure of required negative pressure.

54. according to each described system among the claim 41-53, wherein, but deflection piece on first direction by the flexure spring mechanism application of force.

55. according to the described system of claim 54, wherein, but deflection piece and first party go up in the opposite direction by than the pressure reduction application of force between the low negative pressure of the pressure of surrounding space.

56. according to each described system among the claim 38-55, wherein, pressure detecting element is included in the described device, the wound covering thing is connected on the described separating mechanism of described device through multi-cavity catheter, described multi-cavity catheter comprises first path and alternate path, described first path is used for applying negative pressure in the wound covering thing, and described alternate path is used for negative pressure is delivered to pressure detecting element.

57. according to each described system among the claim 38-56, wherein, pressure detecting element is included in the wound covering thing or wound covering thing place, pressure detecting element is suitable for electronic signal is delivered to the control unit of described device.

58. according to each described system among the claim 33-57, this system also comprises the rinse-system that is used to irrigate.

59. one kind is used for from the pump of biology or the suction of the therapentic part on it flowing material, it comprises:

The disposable suction element that-motor drives;

-driver element, it is used for providing driving force to suction element, and motor is included in the shell of pump;

Suction element removably is connected on the driver element by this way, and the fluid that promptly is sucked does not contact with driver element.

60. according to the described pump of claim 59, this pump comprises the suction cavity, the wall of this suction cavity is formed by suction element, and suction element comprises the volume contraction that is used to make cavity and expansiblely movablely maybe can move back and forth element.

61. according to the described pump of claim 60, wherein, suction element comprises piston.

62. according to the described pump of claim 60, wherein, suction element comprises barrier film.

63. according to each described pump among the claim 59-62, this pump also comprises the container that is used to collect from the liquid of therapentic part suction, this container is connected on the driver element.

64. according to the described pump of claim 63, wherein, suction element is included in the container.

65. according to the described pump of claim 64, wherein, suction element is included in the container non-dismountablely.

66. according to each described pump among the claim 59-65, wherein, container has:

Described import and outlet are arranged like this with respect to container and suction element, that is, make in the upstream of suction element liquid is separated from the gas;

This pump also comprises gas outlet, thereby the gas that is sucked by suction element can be discharged from pump.

67. according to each described pump among the claim 59-65, wherein, suction element has:

Thus, the outlet opening of suction element is connected on the container, so that the liquid that is sucked by suction element is transported in the container;

68. according to claim 66 or 67 described pumps, this pump also comprises and is used for preventing the structure that on the pressure side enter suction element of the liquid of container in suction element.

69. according to each described pump among the claim 59-68, this pump also comprises air exit, this outlet is used for making gas can be discharged to ambient atmosphere, and this air exit is provided with pneumatic filter.

70. according to each described pump among the claim 59-69, this pump also comprises the arbitrary device according to each described device among the claim 1-32.

71. a system that is used to promote wound healing, this system comprise according to each described pump among the claim 59-70 with according to arbitrary device of each described system among the claim 33-58.