DE102010050253A1 - Lid for gastight end of pipe, has sleeve which is formed in prism-shape with three side surfaces abutting at acute angle in cross-section of prism-shape - Google Patents

Abstract

The lid has a sleeve (13) which is formed in a prism-shape with three side surfaces abutting at an acute angle in cross-section of the prism-shape. A concave portion is formed in one of side surfaces of prism-shape.

Description

The invention is in the field of manufacturing technology and medical technology and relates to a cover for the gas-tight closure of a body part with a film element.

Apart from the medical sector, the invention can also be used in other fields in which parts are to be enclosed in a gas-tight manner, in particular when a part of a gas-tight element to be sealed protrudes from the cover element. This may for example be the case with longer strand-like bodies such as pipes or the like, when a part of a pipe has to be sealed gas-tight.

For the gas-tight closure, it makes sense to use a flexible element, for example a foil, which is partially wrapped around the body to be closed.

A particular problem in this case is the gas-tight seal at the boundary surfaces between the cover element and the body to be enclosed / closed, as well as the gas-tight joining of different parts of the cover element with one another.

Even more demanding is the task when it comes to creating such a cover, which is also easily removable again.

The present invention is in this context an object of the invention to provide a cost-effective simple design cover for the gas-tight closure of a body part / a component that can reliably create a gas-tight seal and is as easy to remove again.

The object is achieved according to the invention with the features of claim 1.

For this purpose, in addition to a film element, a sleeve body is provided which is designed as a prism with three side surfaces abutting one another at an acute angle.

This sleeve body allows the filling of gussets, which arise when the film element is arranged around the body and sealed to this. Where two parts of the film element meet around the body to be closed around, there is a gusset space between the body on the one hand and the two coincident film elements on the other hand. At this point, advantageously, the sleeve body can be used, which is placed on the body / body part to be closed and allows the wrinkle-free nestling of the various parts of the film element, without the film element must be severely kinked. This results in a significant improvement of the gas-tightness of the financial statements.

It can be provided particularly advantageously that at least one of the side surfaces is concave in cross-section of the prism.

Thus, the outer contours of the prism / sleeve body can even smoother cling to the body to be closed, in particular the body part to be closed and even where the different parts of the film element meet, they run at an acute angle to each other that a gap-free seal is possible.

The production of the sleeve body from a closed-cell foam makes it easy and easy to handle and deformable to some extent, yet the gas-tightness is guaranteed.

The sleeve body may advantageously be coated with an adhesive in order to facilitate gas-tight adhesion of different parts of the film element and / or of the body to be sealed off in a gastight manner.

Advantageously, it can be provided that the coating projects beyond the edges at the edges at which the side surfaces of the respective prism adjoin one another.

In this way, even where three different elements such as the body to be closed, the sleeve body and the film element abut each other, the emergence of the tightness possibly interfering gaps is prevented. The over the edges of the cuff body protruding adhesive is advantageous gel-like plastically deformable or flowable, but on the other hand adheres drip-free on the sleeve body.

At least one of the sleeve body advantageously has a gas-tight passage for fluids, which may be designed in particular as a passage for a gas hose for the suction of gas. In this case, gas or other fluid may be supplied or withdrawn after sealing the cover member through the sleeve body, in particular, the inner space closed by the cover member may be evacuated.

In addition, provision may be made for the gas hose to have shell-side openings at its end inside the interior closed off by the cover element.

In this case, the gas hose may be bagged at its end and when sucking gas, this can be sucked exclusively through the shell-side openings at the end of the gas hose. This end is then advantageously brought into a granulate or an open-pore body or an open tissue in the region of a wound of a body part to be closed, so that there generates vacuum in the region near the wound and thus the healing can be promoted.

Any existing secretions can also be sucked off.

The presence of a plurality of shell-side openings in the tube prevents the clogging of individual openings, the suction of fluid is impossible.

The invention relates, in addition to a cover element in the form described above, to a sleeve body which can be used for such a cover element. Corresponding cover elements advantageously consist of flexible films. Such a film from which a film element is formed, for example, from a closed-cell or open-cell foam, one or more layers made exist.

The invention will be shown below with reference to an embodiment in a drawing and described.

It shows

1 in a three-dimensional view, a film element;

2 in a cross section, a film member disposed around a body part;

3 a plan view of a section of a film element with Vorfixierelementen;

4 a detail in cross section with two fitting elements;

5 a three-dimensional view of a sleeve body as a passage for a vacuum connection;

6 a special embodiment of a sleeve body in three-dimensional view;

7 a plan view of a section of a film element with a peeling element;

8th a puller in a plan view;

9 a cross section through a peeling element;

10 a cross section through a puller in partially peeled position;

11 a cross section through another variant of a peel,

12 a three-dimensional view of a tubular Abziehelementes in partially withdrawn position,

13 schematically a body part that on a film element 1 is arranged

14 a prepared fleece of an open-cell foam, which is formed as a flat film

15 in a three-dimensional representation of a suction with rectangular cross-section

16 likewise a three-dimensional view of a suction body,

17 in a side view a part of the sleeve body in longitudinal section,

18 in perspective and schematically a body part which lies on a covering element in the form of a foam film,

19 a view of a cover element with Abziehelementen that completely cover a circumferential strip of adhesive applied,

20 schematically the state in which an adhesive tape is partially exposed to pre-fix the body part,

21 an assembly of a body part around which a cover member is pulled up,

22 an arrangement like out 21 in which the cover element is already in contact with a sleeve body,

23 a side view of the arrangement 22 in which one end of a removal element projects laterally obliquely out of the cover element in order to be able to be removed further,

24 a side view of a body part 2 , in this case a leg, with a cover element 1 .

25 a peel strip or a pair of peel strips in more detail, as well as

26 a single two-ply tear strip in a top view.

1 shows in a three-dimensional view a film element 1 , which is rectangular in shape and may for example consist of two layers. Such a film element is used, for example, for gas-tight or vacuum-tight packaging of a body part in order to be able to seal or evacuate the environment of an open wound in a gastight manner in certain healing processes. For this purpose, a body part that is in the 2 with the reference number 2 is designated on the film element 1 placed and this turned up on both sides, with the fitting elements 5 . 6 . 7 . 8th should be brought to a symmetrical arrangement of the film element 1 to get around the body part.

The film element may consist of two film layers, which are separable from each other to provide a film in the inner region, which is gas-tight and cuddly, to vacuum-tight around the body part to be closed and to be vacuum-tight mating in the remaining areas. The outer film layer can for example consist of a slightly stiffer layer, which only serves to handle the inner, more flexible film layer and can be removed later. In addition, the more stable outer film layer protects the inner film layer from injury.

Such a film element is advantageous with joining surfaces 3 . 4 provided, which are distributed circumferentially at the edge of the film element and may be precoated, for example, with an adhesive to adhere to the entrapped body part gas-tight or to achieve adhesion of parts of the film element to other parts of the film element in gas-tight form.

Naturally, the film element is difficult to handle when the joining surfaces are exposed. For this purpose, the joining surfaces are covered with peel-off elements, which are peelable on the joining surfaces. These will be discussed in more detail below.

In the 1 are at the edges of the film element 1 shims 5 . 6 . 7 . 8th shown, which are placed on the outside of the film element and can also be removable. These each have handles 9 on, make the film element in practical use easy to handle.

The 2 shows in cross section the body part 2 , which is shown as a round column in cross-section for simplicity and the wrapped around it foil element 1 , At the ends of the foil element 1 are two fitting elements 5 . 8th represented, which lie congruent to each other.

For better sealing of the film element on the body part 2 is a cuff body 13 provided in the form of a prism, in the gusset between the body part 2 and the edges / joining surfaces to be joined 3 . 4 of the film element 1 lies.

The provision of the cuff body 13 guaranteed for the film element 1 a much easier and more reliable snuggling and sticking in the area of the transition from the body part 2 to the cuff body 13 and at the end of the cuff body 13 , at which the joining surfaces of the film element 1 meet.

In the 3 is a detail of the film body 1 represented, wherein a bonding surface provided with adhesive 4 can be seen as well as a fitting element 5 with a handle 9 ,

To a good prefixing of the film element 1 before joining the joining surfaces 3 . 4 to reach are Vorfixierelemente 10 . 11 . 12 provided, which may be formed, for example, as Velcro elements. It puts 10 a Velcro strip while 11 and 12 Velcro points / pads represent. In place of any Velcro surfaces also easily releasable and advantageous against each other sliding adhesive pads can be provided.

So it succeeds, the joining surfaces 4 cover before joining, so the film element 1 are first placed on the basis of the fitting elements and Vorfixierelemente in an optimal position to then expose the joint surfaces and to achieve a firm adhesion of the joining surfaces together in a gas-tight form.

In the 4 is in a cross section the design of the fitting elements 5 . 8th shown in more detail, wherein the fitting element 5 spigot 5a that has in pass holes 8a of the fitting element 8th fit into it and thus after the joining of the fitting elements, the different parts of the film element 1 Position against each other optimally positive. Pins and mating holes can also snap into each other and be solvable only by applying a certain minimum release force.

The 5 shows a three-dimensional representation of a cuff body 13 which advantageously consists of a closed-cell foam and is obtained for example by laser or water jet cutting from a foam block. The prismatic cuff body 13 thus offers a smooth surface in its mantle area, at the joining surfaces 3 . 4 of the film element 1 adhere optimally and gas-tight. The lateral surfaces of the sleeve body 13 can also be precoated with an adhesive to further optimize the seal and adhesion.

In the 5 is a vacuum line 17 shown by means of a vacuum connector 18 leads to a suction connection. The vacuum line 17 is through the cuff body 13 gas-tight and branched on the other side of the cuff body 13 , which later lies in the closed interior of the film element, in two connections 19 . 20 which may further lead to suction lines at two different wounds within the closed area on the enclosed body part. The ends of such suction lines are formed as bagged hose ends with several shell-side pore-like suction openings.

These are arranged in the wound area within a granulate or an open-cell foam or other permeable substance, by means of which the wound area can be evacuated and, if appropriate, wound secretions can also be suctioned off.

The 6 shows a cuff body 14 that with an adhesive 21 is covered in the region of the lateral surface over the edges of the sleeve body 14 pulled a little way out to the gusset area between the sleeve body and the film element 1 to allow a plastic or flowing deformation of the adhesive for complete sealing. The adhesive may have a gel-like consistency.

In addition, the prismatic cuff body 14 formed with concave side surfaces in the prism cross-section, in the region of the interstices between the sleeve body on the one hand, the film element 1 on the other hand and, for example, a body part to be enclosed angularly with respect to the surface contour in the transition region to optimize the gas-tight seal.

In the 7 is a detail of a foil element 1 shown, wherein a joining surface 4 partly visible. Another joining surface is by a lying on Abziehelement 15 covered. The stripping direction and the longitudinal direction of the peeling element is indicated by an arrow 22 characterized.

In the 8th is a peel-off element 15 shown in more detail. Here is an adhesive strip element 23 represented as well as a tension element 25 ,

The tension element 25 runs like in 9 to recognize more clearly between the first adhesive strip element 23 and a second adhesive strip element congruent thereunder 24 in the space between them 26 , At the ends 23a . 24a the adhesive strip elements 23 . 24 is the tension element 25 connected with these. In addition, the two ends 23a . 24a also be connected to each other.

In the 10 is the function of the peel-off element 15 shown schematically recognizable. The ends 23a . 24a the adhesive strip elements are by train to the tension element 25 in the longitudinal direction of the peeling element (direction of the arrow 29 ) in the gap 26 between the adhesive strip elements 23 . 24 drawn.

It takes place by a Umstülpbewegung the adhesive strip elements, in the course of which the exterior of the peel 15 in a sense, pulled inwards. This results in a curl movement of the adhesive strip elements 23 . 24 instead, when they are arranged between two joining surfaces, they are unrolled and removed without them having to be moved relative to the joining surfaces in a shearing motion.

In this way, the stripping element, even if it is fixed between two joining surfaces 3 . 4 a folded foil element 1 after its prefixing or between a joining surface 3 . 4 and acting as a joining surface skin area of the gastight body part to be sealed, are pulled out with little force. As a result, the joining surfaces come 3 . 4 lie without spacing on each other and fit together firmly and gas-tight.

To better detach the adhesive strip elements 23 . 24 in the course of the rolling movement of the joining surfaces, the adhesive strip elements can additionally with a silicone layer 28 be provided. However, the adhesive strip elements can also be made of a material that adheres poorly on the joint surfaces anyway.

In the 11 another variant of a peeling element is shown, in which two adhesive strip elements 29 . 30 as parts of a hose 16 are formed, which can lie flattened between two joining surfaces. Will on the tension element 25 pulled, so this hose, as in 12 seen as a stocking evert.

In addition, the tension element 25 inside the hose 16 reliably managed.

To a similar effect in area-like adhesive strip elements 23 . 24 These can be achieved in their peripheral areas 31 . 32 also be connected to each other, advantageously in releasable form, for example by gluing, welding or crimping.

In this case, successively, to the extent that the adhesive strips detach from the joining surface and into the space 26 are pulled, also solved the edge-side connection between the adhesive strip. In any case, the edge-side connection causes a secure guidance of the tension element, so that it can not slide laterally between the adhesive strip.

The foil element 1 For example, consists of an inner film, which may consist of polyurethane, while the outer film layer of the film element 1 for example, may consist of polyethylene. However, other material pairings are possible here as well. Particularly advantageously, the film element consists in all the illustrated embodiments of a gas-tight running foam, which is designed either closed-cell or open-pored with a gas-tight layer. The gas-tight layer can be provided, for example, on the outside or inside of the film element. It may be produced by coating the foam or by a process that closes the pores. Of the cuff body 13 advantageously consists of a polyurethane foam, which is closed-pored to ensure the vacuum tightness.

The adhesive strip elements or generally peel-off elements can advantageously consist of polyethylene or of a compound of polyethylene and polypropylene and be siliconized.

The fitting elements 5 . 6 . 7 . 8th can be made of solid plastic, which should not be sharp to avoid injury.

As an adhesive for coating the joining surfaces 3 . 4 Advantageously, an acrylate adhesive is used.

13 schematically shows a body part 2 on a foil element 1 is arranged to be covered by this. There is also a cuff body 13 provided for sealing, through which a vacuum line 17 passed through.

On the inside of the volume to be covered is on the top of the body part 2 a suction body 31 shown schematically, consisting of two strip-shaped elements 32 . 33 which, starting from a single strip in the region of the sleeve body 13 , to two wound areas 34 . 35 branch out. The wound areas 34 . 35 are each with cover pads 36 . 37 covered, on or in which the Absaugkörper 32 . 33 end up.

The individual suction body 32 . 33 are formed as flat strips of a porous, open-pored resilient foam, which are cut out of a flat fleece as needed. They can be connected in one piece and cut out together.

The suction body is in the region of the passage through the sleeve body 13 in the opening in which the vacuum line 17 opens, introduced and there, for example, jammed.

The suction body 32 . 33 can be cut out so that they fit geometrically from the sleeve body 13 to the appropriate wound areas 34 . 35 lead and do not have to be twisted or stretched.

The 14 shows a prepared fleece of an open-cell foam, which is formed as a flat film and can be cut out of the suction or suction strip suitable, for example with a pair of scissors.

In the prepared fleece 38 can also tear lines 39 . 40 be prepared in various forms as perforations or punches, which make it possible to produce certain geometries by tearing out part surfaces, even without the use of a cutting tool.

15 shows in a three-dimensional representation of a suction body of open-cell foam with a rectangular cross-section.

16 also shows a three-dimensional view of a suction, wherein the underside 41 with whom he is on the body part 2 should rest, is so closed or covered with a closed gas-tight layer, that in this area no negative pressure application takes place. Thus, the irritation of the tissue on which the suction body rests, is avoided.

17 shows a side view of a part of the sleeve body 13 in longitudinal section with the vacuum line 17 in the cuff body 13 opens and two suction 42 . 43 that are in the opening in the cuff body 13 open and are trapped there. The suction body 42 . 43 from there to the surface of the body part 2 and then on to a wound area 35 and a further wound area not shown here 34 where the suction body in Absaugkissen 37 lead. The Absaugkissen can either consist of an open-cell foam or granules or of an open tissue or the like.

The Absaugkissen can for example also be firmly connected to the Absaugkörpern or connected in the course of the application of the cover body.

The suction body can also be designed as a foam body, either closed-pored or open-pored, if in its interior a continuous opening, for example in the form of a tube or only as a recess, or as Absaugpfad in open-cell foam is provided, which then from the vacuum line 17 to the Absaugkissen 37 leads. The sheathing of the corresponding Absaugpfades by resilient foam provides the prevention of pressure points on the body part 2 for sure.

The 18 shows in perspective and schematically a body part 2 on a cover 1 in the form of a foam sheet to be covered soon.

In order to improve the practicability of the application process of a cover in a patient, it is provided that in the cover 1 initially a subarea 44 . 45 the transverse adhesive strip in the central region with respect to the longitudinal axis 46 the cover element, which is to be parallel to the longitudinal axis of the body part, is exposed by removing Abziehelementen, so there is the body part 2 on the cover 1 filed and can already be prefixed. Other areas of provided adhesive and Abdichtverbindungen that in the 18 shown schematically and with 47 . 48 . 49 . 50 are initially covered by Abziehelemente, so that these areas do not stick. The division of the deduction elements 44a . 45a . 47a . 48a . 49a . 50a is in the 19 shown.

Between the peel-off elements 48a and 44a , between 44a and 47a , between 50a and 45a and between 45a and 49a each interruptions or at least predetermined breaking points or predetermined breaking points are provided, which allow in a simple manner, in the central region corresponding Abziehelemente 44a . 45a separately and independently of the other peel-off elements in a first step to remove.

20 schematically illustrates the resulting state in which adhesive tape or transfer adhesive 44b and 45b in the central region of the cover 1 is exposed to the pre-fixation of the body part.

After prefixing the body part 2 the situation arises in the 21 is shown. A cuff body 13 gets on the body part 2 placed or glued and the film-shaped cover 1 is pulled up more or less symmetrically on both sides to the body part 2 wrap. Thereafter, corresponding fitting elements, in the 21 are not specifically shown, matched together to achieve an advance direction.

The ends of the peel-off elements are in the 21 shown in the upper area and with 47 . 48 designated.

After the firm pressing of the cover 1 to the body part and the cuff body is in the 22 achieved form shown. Then Abziehelemente can obliquely, for example at an angle of less than 90 °, beislielweise 45 ° bent from the edge of the cover and obliquely between the cover 1 and the body part are pulled out. The one or more adhesive strips under the appropriate Abziehelementen are thus exposed on the cover and this is gas-tight with the body part 2 , the cuff body and itself connected.

There may also be an initial, prepared angling of peel-off elements at an angle of less than 90 °, 45 °, or a similar angle beyond the contour of the cover member to facilitate the start of peeling.

The 24 shows a side view of a body part 2 , in this case a leg, with a cover element 1 , both already in the circumferential direction of the leg extending pullers 47a . 48a . 49a and 50a pulled away and there gas-tight connections between the cover and the leg and the sleeve body are formed. Finally, the connection of the two ends of the cover remains 1 at the top, where already a prefixing by the schematically shown fitting elements, either for example push buttons 50 or protruding tabs, for example in Velcro 51 , is realized. There are, in 24 schematically represented by dashed lines, the Abziehelemente 53 . 54 ,

In a following step, in the direction of the arrow 52 on one tab each 53 be pulled to remove the appropriate peel strip.

In the 25 is the peel strip or a pair of peel strips 53 . 54 in more detail in a view according to 24 , shown from above. The individual pull-off strips 53 . 54 are folded once each and are thus in 2 layers. At the end at which they are pulled out, the free ends there can also be connected to each other, for example in releasable form by embossing, gluing or stapling. This connection is made before pulling or pulling out, as well as along the length provided in the 26 represented connections 58 . 59 , solved. The terminal connections can be made, for example, by tearing off the ends along a perforation 55 in 25 be solved. The connections between the 2 layers are advantageously provided for stabilizing the Abziehelemente to avoid a shift. After dissolution of the compounds, the peel-off elements 53 . 54 in the direction of the arrows 56 . 57 be pulled straight out, so that the two facing, middle layers of the elements 53 . 54 moved together or individually and the entire elements are rolled up. Thus, there is no shearing movement of a peeling element with respect to an adhesive layer, so that the extraction is easy to carry out. The Abziehelemente can also obliquely, that is in the representation of 25 within the plane of the page, for example, inclined at an angle of 30-45 degrees, pulled out, as in 26 indicated by dashed lines.

The peeling-off elements can also be prepared in such a way that corresponding peeling-off ends are led out laterally beyond the contour of the covering element. LIST OF REFERENCE NUMBERS 1 film element 2 body part 3 . 4 joining surfaces 5 . 6 . 7 . 8th shims 5a spigot 8a fitting holes 9 Fitting element with handle 10 . 11 . 12 Vorfixierelemente 13 . 14 cuff body 15 peeling 16 tube 17 vacuum line 18 vacuum Connector 19 . 20 connections 21 adhesive 23 . 24 . 29 . 30 Adhesive strip elements 23a . 24a Ends of the adhesive strip elements 25 tension element 26 gap 27 tensile direction 28 silicone layer 31 . 32 Edge regions of the adhesive strip elements

Claims (10)

Cover element for the gas-tight closure of a body part with a foil element ( 1 ) around the body part ( 2 Gas-tightly joined together is characterized by at least one sleeve body ( 13 ), which is formed as a prism with three in the cross section of the prism at an angle abutting side surfaces. Cover element according to claim 1, characterized in that at least one of the side surfaces in the cross section of the prism ( 13 . 14 ) is concave. Covering element according to claim 2, characterized in that at least two, in particular all three side surfaces of the prism ( 13 . 14 ) are concave in cross-section of the prism. Covering element according to Claim 1 or one of the following, characterized in that the prism (s) ( 13 . 14 ) consists of a closed-cell foam / exist. Covering element according to Claim 1 or one of the following, characterized in that the prism (s) ( 13 . 14 ) with an adhesive ( 21 ) are coated. Covering element according to claim 5, characterized in that the coating ( 21 ) at the edges where the side surfaces of the respective prism ( 13 . 14 ) abut each other, protruding beyond the edges. Covering element according to Claim 1 or one of the following, characterized in that the at least one prism ( 13 . 14 ) has a gas-tight passage for fluids. Covering element according to claim 7, characterized in that the passage is a gas hose ( 17 ) for sucking off gas. Covering element according to claim 8, characterized in that the gas hose ( 17 ) has shell-side openings at its end within the interior closed by the cover element. Cuff body ( 13 . 14 ), formed as a triangular prism, in particular with concave side surfaces, consisting of a closed-cell foam for use in a cover according to one of claims 1 to 9.

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