Chest Drainage Apparatus.

[0001] The present invention relates to a chest drainage apparatus, a chamber for use in such a device, as well as a method for Chest drainage.

[0002] The Chest drainage used to support blood, secretions or air from the Pleuraspalt , also called pleural cavity. The Pleuraspaltlung skin (Pleura pulmonalis) of the lung is the space between the and the pleura (Pleuraparietalis). The Pleuraspalt is filled with a serous fluid, wherein there is a relative vacuum physiologically to the outside air, which still increases upon inhalation. That should the lung by inhalation of the active expansion of breast wall muscles follow and the diaphragm. Will the relative vacuum in the Pleuraspalt repealed, e.g. at a surgery or an accident, so no longer follows the lung the expanding chest by inhalation. The defect, which leads for entry of air into the Pleuraspalt is generally called Luftfistel.

[0003] The Chest drainage is used to, maintain or restore the physiological reduced pressure. Here, the chest and the pleura intermediate rib area opened by a, and finally a controlled suction applied introduced a drainage hose, around the draining Pleuraspalt. The most common application of the drainage tubes takes place in connection with operations, in which the chest must be opened.

[0004] In thorax drainage devices State of the Art antigen are known. You have, as is represented in 1 Fig., usually with an electric motor operated Säugpumpewall vacuum on a 1 or a, which is connected via a suction line 2 or 3 with a fluid sump which and which produces a reduced pressure in this fluid sump or 3. From the fluid sump 4 for pleural P 3 leads a drainage hose, aspirating fluid from the pleural cavity P in the fluid sump. In Fig. is designated with the reference symbol L 1 the lung.

[0005] US 5,738,656 a Drainage device for use with a drainage pipe and an auxiliary line disclosed, by means of which the drainage tube can be flushed and the suction pressure controlled. WO 2009/005 424 describes a Draining device, wherein the reduced pressure in the fluid sump is controlled by means of a sensor, wherein the sensor is arranged in the suction pipe leading to Säugpumpe.

[0006] an adaptive algorithm is proposed for the WO 2012/162 848 thorax drainage therapy In, wherein a suitable LuftfistelSäugpumpesize measure for the vacuum generated is determined as a function of this ratio between the length and the thickness is regulated size measure.

[0007] US 6,261,276 disclosed a manually operated chest drainage apparatus with a fluid sump formed in the form of a bellows. This bellows is used as a vacuum pump and at the same time as an indicator of the reduced pressure generated in the fluid sump.

[0008] US 8,177,763 disclosed a Drainage device for use with a vacuum chamber, which is connected to a vacuum source, and with a fluid sump, which is connected to said vacuum chamber via a hydrophobic membrane in more fluid-communicating.

[0009] Will the drainage tube at the conclusion of the treatment from the removed Pleuraspalt , there is a risk of an overfeed of the lung, resulting in a Pneumothorax can lead. Reason for this is when a sudden increasing the pressure amplitude deep inhalation, i.e. a highly increased vacuum in the Pleuraspalt , which also overstretched the lung.

[0010] It is therefore a task of the invention, the risk of excessive overextension of the lung at the conclusion of the to minimize Chest drainage.

[0011] a chest drainage apparatus having the features of claim 1 solve This task, a chamber for use in such a chest drainage apparatus having the features of claim 17 having the characteristics of Claim Chest drainage 16, as well as a method for.

[0012] The chest drainage apparatus for extracting fluids from a Pleuraspalt of a patient by the invention has a fluid sump for collecting the aspirated fluids and a drainage tube reduced pressure to connect the fluid collectorPleuraspalt of the patient with the on. The fluid sump is connectable to a vacuum source, so as to generate a reduced pressure in the fluid sump. The chest drainage apparatus has a device for damping pressure differences during the patient's breathing on adjustable, wherein this device is adjustable independently of a suction capacity of the vacuum source.

[0013] Thus it is possible, with an otherwise unchanged drainage parameters the subject, at the completion of the drainage to induct permanent. It is thereby possible, already during the respiration and the lung to allow increasingly widened the pressure differences in the Chest drainage work out, so that they can cope with greater extents without damage. The risk an overfeed of the lung with subsequent massive Pneumothorax at the conclusion of the drainage is reduced thereby.

[0014] Preferably, the device for damping Pleuraspaltair return flow for a device for setting a pressure differences. Therefore, the hardness or. Flexibility of the Set thorax system. The and thus the damping of the pressure differences in the expansion of the lung depends PleuraspaltPleuraspalt ab air return flow in the therethrough from the possible amount of the.

[0015] The air return flow can manually or automatically adjusting the arrival. In one embodiment, the automatic adjustment on the basis of a sensor value is adjustable. That is to say the adjustment is not over an extended period of time, e.g. several hours or days, maintained the same. It is regulated to be constant, to also to dampen sudden difference of pressure increases , e.g. when the patient inhales overexerted or inadvertently too deep. The sensor value is preferably a in the container, in the drainage tube or in the detected pressure Pleuraspalt.

[0016] there is preferably the device for damping pressure differences between secretion collector and suction source or in the housing of the suction source or in or on the drainage tube secretion collector or in or on the.

[0017] In a preferred embodiment, the device for damping pressure differences on a chamber, with adjustable stiffness. Under unity divisibility the stiffness is here the stiffness of the walls, the change in the volume available for the air and also the supply of external air into the chamber meant. These is explained below with reference of some preferred embodiments.

[0018] In the subsequently described embodiments has a chamber with an inner space and the device for damping pressure differences with a leading to the patient opening on.

[0019] In one embodiment, the chamber is formed by rigid walls with the exception of a in a wall of the chamber recessed flexible membrane, wherein the flexibility of the diaphragm is adjustable. The membrane may be spring-loaded, an excessively strong expansion of the diaphragm avoids.

[0020] In another embodiment, the chamber of rigid walls forming a part of a wall formed with the exception of a spring-loaded piston, whose position is adjustable relative to the interior space.

[0021] In another embodiment, the chamber walls formed of stiff, wherein an insertable container is arranged in the chamber, which can be filled from the outside with an incompressible fluid, the volume of the interior to limit adjustable.

[0022] In another embodiment, the chamber of rigid walls formed with a flexible bellows forming a part of a wall with the exception of a to the interior of the chamber is open towards inner space, wherein the volume of the interior of the bellows is adjustable.

[0023] In another embodiment is a first chamber having an inner space and with a leading to the patient opening present, wherein the first chamber is formed by rigid walls, wherein one wall has a closable first air interchange opening. This is used to connect with a second chamber, which is designed to be closed to a second air interchange opening , wherein the first chamber with the second chamber can be connected via the two air-communicatingair interchange openings in.

[0024] In another embodiment, the chamber walls formed of stiff, wherein the chamber has a filling opening, communicating with the suction source which is independent of an optional suction opening for the purpose of setting the damping of the respiration and through which air may be blown into the chamber is and evacuatable.

[0025] In another embodiment, the chamber walls formed of stiff, wherein the chamber has an outwardly leading valve, which is the basis of a detected negative pressure opens outwardly.

[0026] Preferably, the chamber or the first chamber through the fluid sump formed. It is alternatively arranged in or on this. Alternatively or additionally it may also be connected to the drainage tube or via a branch piping and fluid sump be arranged between suction source.

[0027] Other embodiments are recited in the dependent claims.

[0028] Preferred embodiments of the invention are described in more detail below with reference to the drawings, the only serve for explaining must be interpreted and not restrictive. In the drawings show:

Fig. a schematic representation of a lung with related chest drainage apparatus according to the 1 State of the Art;

Fig. 2a, a schematic representation of a lung during exhalation in existing Chest drainage;

Fig. Pleuraspalt during the exhalation 2b 2a in the change in the pressure the Fig. according;

Fig. 3a, a schematic representation of a lung in existing Chest drainage during inhalation;

Fig. Pleuraspalt during inspiration according to the change of the vacuum in the 3b 3a Fig.;

Fig. 4a, a schematic representation of a lung during exhalation without Chest drainage;

Fig. Pleuraspalt during the exhalation 4b 4a in the change in the pressure the Fig. according;

Fig. 5a, a schematic representation of a lung in existing Chest drainage during inhalation;

Fig. Pleuraspalt during inspiration according to the change of the vacuum in the 5b 5 a Fig.;

Fig. State of the Art 6a, a schematic representation of a lung during a Chest drainage according to the;

Fig. Pleuraspalt 6b, a schematic representation of the pressure in the in function of time during the Chest drainage according to Fig. 6a;

Fig. 6a 7a a schematic representation of the lung State of the Art Chest drainage according to the after completion of the according Fig.;

Fig. Pleuraspalt 7b, a schematic representation of the pressure in the in function of time after completion of the 7a Fig. Chest drainage according to;

Fig. 8, a schematic representation of a chest drainage apparatus in a first embodiment according to the invention with an associated lung;

Fig. 9a, a schematic representation of a lung during a Chest drainage with a fluid sump according to the invention;

Fig. Pleuraspalt 9b, a schematic representation of the pressure in the the invention in function of time during the 9a Fig. Chest drainage according to;

Fig. Chest drainage 10a, a schematic representation of a lung after completion of a fluid sump with a according to the invention;

Fig. Pleuraspalt 10b, a schematic representation of the pressure in the the invention in function of time after completion of the 10a Fig. Chest drainage according to;

Fig. fluid collector 11 in a first embodiment according to the invention, a schematic representation of a;

Fig. fluid collector according to the invention in a second embodiment, 12, a schematic representation of a;

Fig. fluid collector according to the invention in a third embodiment, a schematic representation of a 13;

Fig. fluid collector according to the invention in a fourth embodiment, a schematic representation of a 14;

In a fifth embodiment according to the invention 15 Fig. fluid collector a schematic representation of a;

In a sixth embodiment according to the invention, a schematic representation of a 16 fluid collector Fig.;

In a seventh embodiment according to the invention, a schematic representation of a 17 Fig. fluid collector ;

Fig. fluid collector a schematic representation of a eighth embodiment according to the invention in a 18;

Fig. fluid collector a schematic representation of a ninth embodiment according to the invention in a 19;

Fig .20

Fig .21

Fig .22

Fig .23 a

Fig .23 b

Fig .24a

Fig .24b

a schematic representation of the pressure in the fluid sump according to the invention when using a Pleuraspalt during the 18 and 19 the Chest drainage in function of time Fig.;

in a tenth embodiment according to the invention, a schematic representation of a fluid collector ;

a schematic representation of the pressure in the in use of the 21 fluid collectorPleuraspalt Chest drainage during the according to the invention in function of time according to Fig.;

a schematic representation of a chest drainage apparatus in a second embodiment according to the invention with an associated lung;

a for Fig. 23a alternative embodiment;

a schematic representation of a lung with an associated

a more specific representation of a variant of the embodiment according to Fig. 24a.

[0029] 1 shows Fig., as above already mentioned, a lung during a Chest drainage. In 2a is the situation during exhalation Fig. represented. In this and the subsequent Figures are for reasons of simplicity only the drainage tube 4 and the fluid sump 3, but not shown the vacuum pump. This is, of course, during the draining with the fluid sump 3 via the suction line (here represented only with a simple opening 2) connected.

[0030] During the exhalation the lung L decreases, as this is represented by the double arrow 2a schematically in Fig.. The Double arrow visualized the elongation of the lung. The Pleuraspalt absolute pressure in the is reduced, i.e. the relative pressure difference to the atmospheric pressure is low. These 2b with the arrow O is represented in Fig.. When exhalation Pleuraspalt prevailing reduced pressure increases in the direction which is at atmospheric pressure. In this example reaches 0.5 kPa he-.

[0031] during the Chest drainage breathes the patient is now a, such stretches the lung L from. These 3a is represented in Fig.. The volume due to the larger pressure difference is also greater and thereby pulls in the Pleuraspalt to the atmospheric pressure, i.e. by virtue of the larger absolute negative pressure value , 3 in the air from the fluid sump Pleuraspalt. These 3a with the rectangular beam and the reference numeral V represented in Fig.. The negative pressure value upon inhalation 3b is designated with an arrow I in Fig.. He is -2.5 kPa in this example.

[0032] Is the drainage tube 4 clamped shut is switched off or the entire Draining device removed the Säugpumpe , so forms Pleuraspalt again a stand-alone system with the the lung, as this is represented in Fig. 4a. In Fig. 4b shows the value of pressure during exhalation in turn O Arrow on. The value is -0.5 kPa in this example unchanged. In Fig. 5a is the situation represented by inhalation without communication with the Chest drainage. Since no air can be drawn from the container in the Pleuraspalt , in the underpressure value increases the absolute Pleuraspalt P more strongly to. In this example, to -5.5 kPa. The Dashed 5b shows the expansion during the curve represented in Fig. Chest drainage. The lung L can prosper without Chest drainage thus expand more. The danger arises an overfeed Pneumothorax -and therefore of the lung.

[0033] 6a and 6b show the situation during the Chest drainage again Fig. The, 7a and 7b after completion of the the Fig. Chest drainage. In Fig. 7a is a manometer M represented, by means of which the pressure is measured in the Pleuraspalt. Ap shall mean the pressure differential between inhalation and exhalation. In this and the pressure in the analogue representation for p It is Pleuraspalt and tonne for the period.

[0034] 6b and 7b can be seen in the comparison of the Fig. As, the increase in pressure differential takes place abruptly and immediately after termination or Unterbrücken the drainage.

[0035] This situation is to be avoided with the chest drainage apparatus according to the invention now. Fig. 8 shows a first embodiment according to the invention therefore a chest drainage apparatus according to. This device has also a suction device, preferably a 1 on Saugoder vacuum pump, which is connected via a suction line with a fluid sump 3. From 3 leads a drainage hose Pleuraspalt P of a patient 4 for fluid sump. Instead a motor-driven vacuum pump 1 can also be connected to a fluid sump 3 hospitalin-house vacuum system of the the.

[0036] 3 is designed to be stiff fluid sump The. He can consist of one or more chambers. The at least one chamber can be equipped with dolls is a purge liquid to limit Herumschwappen. The fluid sump 30 for connection to the drainage tube 4 on 3 has a drainage opening. It points 1 to 2 for connection to the further a suction opening Säugpumpe. The suction opening 2 is preferably provided with a check valve and/ora bacteria filter, the 1 be protected from contamination Säugpumpe. Such Container State of the Art well known in the are. The State of the Art 3 according to the invention may also be less than in the fluid sump set forth.

[0037] according to inventionunchangeable this in itself rigid and is formed with a means 2 5 provided with internal volume fluid sump, fluid collector 2 can be adjusted with which the flirt of the. Shortly after the operation or upon start of the system is adjusted and is always towards the end of the drainage drainage soft stronger and more rigid, so that the lung can get used to greater extents.

[0038] Facilities include in itself closed chamber having an opening leading to the patient.

[0039] In the embodiment according to this device has a membrane 50 on 9a Fig. 5, which forms a part of the external wall of the 3 fluid collector. The fluid sump thus forms the above-mentioned chamber. This membrane 50 is fluid-tight, in particular air-tightly, formed. It can be by means of a spring 51 stretch, as a result of which their hardness, i.e. its own spring force, can be adjusted. In Fig. 1.2 9a are three positions, 3 of the spring 51 and thus the membrane 50 shown schematically. In Fig. 9b is evident, how the changes in the pressure profile as a function of this adjustment Pleuraspalt. Is 1 the spring 51 in the position on the day 3, the membrane is stretched and very soft 50 hardly so. The thanks to the flexible membrane 50 changes at elevated pressure difference 3 fluid sump the volume, so that sufficient air can pass and a manner that the lung L Pleuraspalt P in the is prevented.

[0040] 50 something made stiffer On the second day is the membrane is tensioned by putting more, for example up to the position 2 is harder or stiffer. The Drainage system total overall, since the volume change of the 3 is limited fluid collector. When Pleuraspalt P less air from the fluid sump into the inhalation is being passed 3. The Pleuraspalt P may increase in the reduced pressure. This is in "day 2" designated range recognizable 9b Fig. in the with. The lung L can, consequently, extend a little more. Am third day The membrane is even more tensioned and stiffened 50, 51 by the spring 9a is brought into the position 1 according to Fig.. The absolute Pleuraspalt P can make even greater increase in the underpressure value, as indicated in "day 3" is recognizable in the region 9b Fig.. Pleuraspalt P and the extension of pressure conditions in the lung will thus be able to a state after completion of the L are transferred successively Chest drainage, without abrupt changes in the pressure difference are obtained. The 10a and 10b after completion of the situation is represented in the Fig. Chest drainage. As is recognizable, Ap1istAp2 identical or approximately identical.

[0041] according to invention will thus the load on the lung L incrementally increased until the drainage is removed. Increases may, as described in this example, be carried out daily. You may, however, also in other time intervals of arrival and/or of phases of load reduction be interrupted. These is healing procedure of the individual patient by the medical staff be treated according to the decided. according to invention is avoided that upon completion and removal of the drainage can take place a sudden manner that the lung L.

[0042] 11 is the aforementioned first embodiment of the according to the invention 3 fluid collector In Fig. represented. The 30 means the opening for connection to the drainage tube 4 reference number, the reference number 1 or respectively of the suction line for connection to the suction opening 2 the Säugpumpe. In a wall 31 of the otherwise rigid and the membrane 3 is formed with 50 fixed fluid collectorunchangeable internal volume. The membrane 50 can rectangular, triangular, round, oval or in another form be constructed. It is formed in a fluid-tight manner. Preferably, there is it is made of silicone.

[0043] The in the wall 50 is here along their external perimeter 31 membrane held and fixed. You can for example glued, welded or be made in one piece with this in the multi-injection moulding procedure.

[0044] 51 50 is preferably integral with the membrane and connected spring The via a movable armature 52 adjustable. The armature 52 in its position relative to the said container is fixable and 3 50 displaceable relative to the surface of the membrane. These is represented in the Figure with the double arrow. These also applies to the following examples, which have an armature or other fixing.

[0045] 52 can, for example, as a slide or rotary knob or formed with anchor The such a operating element be connected. He is, for example, a part of an additional body arranged on the container. Is 5 provided with the reference number 8 in Fig. Such an additional body.

[0046] 50 11 shows the line represented in broken lines, with membrane Fig. The position of the membrane by inhalation, with solid lines represented the position upon exhalation 50 membrane.

[0047] 12 is a second embodiment represented Fig. In. Here 50 via a rigid connecting rod 520 is the membrane in the direction perpendicular to the membrane surface 52 connected with the adjustable anchor. Again 50 in different stretched positions can be fix the membrane, or about its spring force and hardness. Adjust flexibility. The further the membrane is stretched and pulled away 50 from the container 3, the overall system is that much more severe. The, shown in Figure 2 shows its position during inhalation membrane, the membrane 50 shows the position with solid lines represented upon exhalation.

[0048] 13 is a third embodiment represented In Fig.. The membrane 50 is parallel to its surface adjustable here;

that is to say, it is tensioned or relaxed parallel to its surface. These is represented with the double arrow. This also elaborates on the actuating means such as a slide or a rotary knob enable. The same applies here, the more the diaphragm is stretched that much more severe or more rigid is the overall system. The, shown in Figure 2 shows the situation upon inhalation membrane.

[0049] In the embodiment is a fastener 32 14 Fig. according, with which the membrane 3 is held in the wall 31 of the container 50, slidably, so that the membrane is stretched 50 different strengths. As here represented as a slide or carriage 32 can fastener The be formed. It can also be, for example, in the form of a diaphragm opening and closing. May I also refer to the same as in the embodiment according to Fig. 13.

[0050] 15 is a part of a wall in the embodiment 3 31 of the container according to Fig. rigidly but formed so as to be displaceable. This part forms a piston 54, which is held in a 55 piston housing being open to the atmosphere. The piston 54 is sealed to the outside. Here 56 is a sealing ring 54 disposed on the outer side of the piston, for example, according to. This piston 51 with an adjustable armature 54 is in turn connected via the spring 52. The displaceability of the piston and thus the hardness or 54. Flexibility of the container by the position of the armature 3 suggests, in turn adjust 52. The spring 51 allows the flexibility of the container during the exhalation inlet and 3 here. That is to say the piston 54 moves toward interior of the container 3, when the suction force of the vacuum in the inner space by inhalation is greater than the spring force. The position of the core 52 influences the hardness of the system.

[0051] The previously described embodiments can be on the container 3 Arrange. You can also be in a separate intermediate container 1 and container 4 or between 3 and draining tube Säugpumpe between container form 3.

[0052] 16 and 17 is in the embodiments according to the the system hardness Fig. also generates by changing the volume of the container to the drainage device, but without the fluid sump to strengthen -3 itself partially flexible.

[0053] 16 is a flexible insertable container 3 according to 57 disposed in the fluid sump Fig.. Example, he may be a bag. This transport fluid collector 571 through a feed opening 3 connected with the outside of the is. 570 571 is closable filling opening with a closure The. In these insertable container 57 can be an incompressible fluid, for example water, in a predetermined amount filling, so that the insertable container fluid collector 3 assumes a predefined volume within the 57. This indicates the volume of air available for the pressure equalization with the small and the system 3 Pleuraspaltfluid collector is harder the. In increasing healing is more filled 57 said insertable container, prepare the lung at the completion of the drainage.

[0054] In the embodiment according to an internal partition 16, the fluid sump 33 on 3 Fig., which delimits the insertable container 57 from the remaining interior space. Here, a change of air in the interior of the still possible between the subregions fluid collector 3. This partition 33 is optional. The insertable container 57 can also be arranged in a different or the single interior of the 3 fluid collector.

[0055] 58 extension container 17 is the embodiment according to a present In Fig., which is connected with the fluid sump air interchange opening 34 via a 3. Preferably, or otherwise attach to the fluid sump 58 3 extension container the above it can be secure to it. The extension container 3 rigid and rigidly 58 can be constructed as the fluid sump. Preferably, system, but it is designed to be flexible, so that its volume reduced pressure prevailing in the interior of the container at least partially adjusts the. At the beginning of the drainage is such a extension container present. He can be replaced by a smaller extension container in the course of the drainage. Towards the end of the drainage is used preferably only nor the fluid sump 3, wherein the then is sealed airtightly air interchange opening 34.

[0056] 18 and 19 are embodiments represented in the Fig., which enable a fast active regulation of the negative pressure in the Pleuraspalt. Am fluid sump 18 is a bellows 59 arranged 3 according to Fig., which with respect to the interior of the open and is designed to be closed with respect to the environment 3 fluid collector. This bellows 59 has a rigid wall 590 on, which by means of an armature 52 to move towards and away from the interior of the container 3. Therefore, the internal volume of the bellows 59 change. The movement of the armature 59 can be effected manually and of the bellows 52, wherein the wall is fixed in a different distance from the inner space depending on the 590 healing stage and drainage system is set so the hardness of the. The closer the wall 3, and thus the smaller the internal volume 590 in the fluid sump is 59 of the bellows, the overall system is that much more severe.

[0057] A active regulation can be achieved, by the armature is connected with an electric motor and is moved through a controller. This may he sufficient time for healing are brought to a solid position as a function for several hours and there remain so. Preferably, however, the pressure in the drainage tube or a parallel auxiliary line or in the fluid sump monitored. The obtained information on the pressure change sensor value give. The armature is moved according to said monitored pressure change. That is to say is to far too great an extent to be expected is inhaled and a difference of pressure point , so is 3 moved toward the wall and the bellows 590 to the container 59 reduced in size. Air is conveyed from the fluid sump 3 for Pleuraspalt P. These 18 is represented with dotted lines in the Fig.. Upon inhalation difference of pressure points Dashed represented in Fig. That should bring about 20 or selectively reduce, as compared with the continuous-line represented is recognizable more damped pressure course curve signals.

[0058] The same result with the embodiment according to 19 20 may also be according to Fig. achieve Fig.. Flier 57 is in turn a flexible insertable container, here a balloon, 3 disposed in the fluid sump. The insertable container 571 57 has an outwardly directed opening on, which in this case is provided with a not shown valve. This opening 571 57 blown and sucked air into the insertable container is, preferably also on the basis of a measured pressure change and preferably pneumatically. The air is blown in to deep inhalation and wherein normalization of situation, i.e. flat again if necessary sucked off again in respiration. By the selection of the volume of air injected can also be aspirated or bring about difference of pressure points.

[0059] A insertable container 57 is not absolutely necessary. The 3 blown directly into the fluid sump and for that air can also be sucked off.

[0060] 21 is a manually or electronically in the embodiment according to present 53 operable valve Fig., which is at a predefined limit pressure in the interior of the 3 opens fluid collector. Therefore, air flow from the outside into the fluid sump and the pressure difference with respect to the atmosphere reduce 3. With increasing healing of the lung is the limit pressure set differently, so that the valve only opens at a larger pressure difference 53. For example, on the first day at a 53 thus be able to give valve 3 in the container 2 kPa Open prevailing reduced pressure of-, on the second day at -4 kPa and on the third day at -6 kPa. In Fig. Pleuraspalt 22 is represented at the inlet and the pressure profile in the exhalation, which reflects the result of such valve timing.

[0061] The above-described static embodiments according to Fig. 11 to 15 and 21 can be also automatically operate analogously. You can also be provided with a controller, to regulate the hardness of the pressure measurements in accordance with an automatic active drainage system to achieve, to the end result according to obtain 20 Fig..

[0062] This Chest drainage is advantageously not only in preparing a termination of the active control. You also serves, abrupt peaks with an unintentional to deep inhalation generally to prevent the risk of a break of the drainage and unprepared-, for example while pinching of the drainage tube or upon accidental interruption of Säugpumpe , to avoid. Where difference of pressure point by inhalation a is made softer so the overall system, so as to smooth and to prevent the excessive lung expansionPleuraspaltdifference of pressure point in the.

[0063] The examples described above relate to changes in or on the fluid sump in the housing of the changes can be 3 1 make Säugpumpe. The same: i.e. there are for example 6 or valves on the suction hose Säugpumpe 2 or at the vacuum port of the pressure compensation reservoir make 1, wherein the pressure compensation reservoir 6 with the above-described membranes, setters or bellows may be provided. These is 23a represented in Fig.. Furthermore, such devices 10 in a housing 5 for the damping of pressure differences also Säugpumpe Arrange the 1, wherein the communication with the fluid sump 3 via the suction opening, or as represented in Fig. 23b, fluid collector takes place via an additional opening of the 3. There are also other arrangement possibilities. Identical parts are designated with same reference symbols as before in Fig. 23b.

[0064] 7 be provided with a branch piping Likewise, the drainage tube 4, which leads to such a compensating container 6 or valve. These 24a is represented in Fig.. That practical arrangement in a housing 1 is a pump 24b shown in Fig. 10, wherein the means 5 for damping is represented, but not a housing surrounding this. Identical parts are represented with same reference symbols 6.

[0065] The described here also with regulated Säugpumpen function examples, which monitor and regulate the vacuum in the drainage system. For example, this reduced pressure in the cavity that is, in the Pleuraspalt , in the drainage tube, are monitored in an auxiliary line or in the fluid sump. Reason for this is that the rules are too slow Säugpumpe taking place by means of the, balancing the pressure changes between inhalation and exhalation. The according to the invention makes possible, however, static and dynamic compensation adjustable hardness of the system, which are sufficiently rapid, the lung to train that no abrupt differential pressures are created and the lung thus Exit the drainage is cycled.

[0066] The a brusque expanding of the lung, which allows for a system according to the invention prevents an optimal Training of the lung for the date of termination a Chest drainage.

[0067]

1 Säugpumpe

10 housing

2 suction opening

3 fluid sump 30 drainage opening

31 wall

32 fastening element 33 partition

34 air interchange opening

4 drainage tube

5 means for adjusting the hardness a chest drainage apparatus 50 membrane

51 spring

52 armature

520 connecting rod

53 valve

54 piston

55 piston housing

56 sealing ring

57 insertable container

570 Closure

571 filling opening

58 59 bellows extension container

590 wall

6 Desurging tank branch piping 7

L Lung

P Pleuraspalt

O pressure upon exhalation I pressure upon inhalation M manometer