ITPI20090142A1 - MEDICAL DRAINAGE DEVICE WITH INDEPENDENT DISCHARGE PATH FROM THE RETURN PATH. - Google Patents

Description

Description

MEDICAL DRAINAGE DEVICE WITH DELIVERY PATH

INDEPENDENT OF THE RETURN ROUTE

Scope of the invention

The present invention relates to the technical sector of devices for medical use.

In particular, the invention refers to an innovative drainage device in which the delivery path of a liquid and the return reflux path can be oriented independently of each other.

Brief notes on the known art

In the surgical field, drainage devices have been commonly known and have been widely used for a long time now. These, as is well known, have the function of cleaning certain areas of unwanted substances and liquids through an injection of a physiological fluid and a simultaneous aspiration of the same around the infected areas. An example may concern the cleaning of organs or areas infected with â € œpusâ € generated by the triggering of infectious and inflammatory phenomena.

A drainage device essentially consists of a suction tube of variable diameter depending on the seat into which to introduce it and the viscosity of the liquid to be sucked.

A particularly functional solution includes two coaxial flexible tubes, ie one sheathed within the other. The outer tube is provided with a hole at the apex through which the inner tube sucks the liquid present in the infected area. The outermost tube is also generally provided with a plurality of holes along its length so that the physiological delivery liquid can flow outwards together with the suction by the internal tube. On the opposite side to the suction apex there is generally a branch fitting that connects the delivery of the physiological liquid on one side and the suction of the infected liquid on the other.

However, such drainage devices suffer from some technical limitations.

The tubes, being coaxially constrained, are obliged to necessarily act at the same point. In this way, the surgeon does not have the possibility of starting an aspiration at a point distant from the exact point of entry of the physiological fluid, despite the fact that the physiological fluid quickly invades the surrounding areas as well. The need to aspirate at a point other than the fluid inlet can only be satisfied through the simultaneous use of two or more independent drainage devices, all with an evident additional traumatic effect for the patient.

Furthermore, current drainage devices are not particularly efficient in terms of suction. The suction is in fact entrusted only to the apex perforated at the head of the two coaxial ducts and therefore to a strongly limited suction area. Therefore, in the case in which it is necessary to operate on large areas, the apex must be guided along the entire area in order to cover it entirely. It is evident that this operation requires a long work by the surgeon with more invasive effects for the patient.

Summary of the invention

It is therefore an object of the present invention to provide a drainage device which overcomes the aforementioned drawbacks.

In particular, it is an object of the present invention to provide a drainage device in which the delivery fluid can be directed independently from the suction area.

It is therefore an object of the present invention to provide a drainage device that is versatile, so that the operator can reach, if necessary, both remote suction areas and areas located near the washing area.

It is also an object of the present invention to provide a drainage device which is efficient and allows the suction of large areas in a rapid and minimally invasive manner.

These and other purposes are therefore achieved by the present drainage device as per claim 1.

The drainage device (1) in question therefore comprises a first duct (2) and a second duct (3) and with the second duct (3) arranged substantially coaxial with respect to the first (2).

According to the invention, the second duct (3) is configured in such a way as to slide with respect to the first duct (2). In addition, the first duct (2) comprises at least one opening (4) such as to allow the passage, by means of the aforementioned sliding, of the second duct (3) towards the outside.

In this way the operator, or rather the surgeon, can easily guide the second duct to the desired points distant from the entry point of the first duct.

In a first case, the first duct 2 can have, for example, an inlet function for a first washing fluid such as a physiological solution. At this point the second duct 3 is used as a suction element and guided by the surgeon, through its extension or retraction through the opening 4, in all the desired points.

Alternatively, the first duct 2 can have a suction function and the second 3 a washing function.

It is evident that this solution allows to clean up large areas without necessarily requiring the contextual use of several drainages.

Advantageously, the opening (4) can be arranged along the first duct 2 at a distance h with respect to the apex (3â € ™).

Of course, the same opening could possibly also be predisposed in correspondence with the apex 3â € ™ itself.

Advantageously, the opening (4) has a length L contained within a variable range from 1 cm to 3 cm and a width W such as to allow the passage towards the outside of the second duct (3).

In this way the operator can maneuver the second duct 3 in such a way that its apex protrudes from the opening 4 and can thus slide it freely between an extended position and a retracted position. In particular, in the extended position, the duct 3 protrudes for a certain length from the opening 4 (the length of exit is naturally adjustable by the surgeon and depends on the overall length of the duct 3 itself in use). In the retracted position the duct 3 is pulled so as to be partially or entirely within the duct 2 or even completely extracted therefrom.

Advantageously, the second conduit (3) can

comprise a terminal element (5) comprising a

plurality of holes (8) and / or guide channels (9; 13; 14) e

configured to capture fluid for

convey it into the duct (3) or, in the case of use as

liquid injector, to spray the washing area.

This solution is however particularly indicated in

especially if the second duct 3 has

own function of aspirator.

Advantageously, the terminal element (5) can be

made of flexible rubber so that you can

be folded back to contour at least partially

a chosen area.

This winding solution does not result

absolutely traumatic for the organ or area you are on

Opera.

This solution is particularly beneficial for

surround entire organs to be treated.

Furthermore, the terminal element (5) can have at least one

of the following sections of your choice:

- H section comprising four prepared wings (12)

in such a way as to form four channels (9);

- Rectangular (11) or quadrangular (11) section e

comprising a plurality of holes (8);

- H section comprising two channels (14);

- X section comprising four channels (13).

Such solutions are particularly advantageous for

allow a cleaning action on a large area and not

exclusively on a single point as per known technique.

In fact, by placing element 5 next to the area to be treated

all the holes or channels present will face out

directly on the area to be treated with an action

contemporary and therefore more effective than the single

hole from known technique.

The flexibility of the construction material of element 5 means that the area to be treated can easily be outlined at least partially.

Advantageously, a fitting (7) can be provided between the terminal element (5) and the second duct (3).

Advantageously, the fitting can have a substantially V shape in such a way as to form an opening for insertion into the opening (4).

In this case, the traction action of the duct 3 inside the duct 2 is greatly facilitated by the opening which also allows the terminal element to enter the duct 2.

Alternatively, the terminal element (5), the duct (3) and the fitting (7) can be made in a single piece, for example by molding.

Advantageously, the drainage device 1 is further provided with a bifurcation fitting 15, arranged on the opposite side to that of the cleaning fluid outlet or similarly the inlet of the sucked fluid. The bifurcation device directs a first fluid along the first channel (2).

Brief description of the drawings

Further characteristics and advantages of the present drainage device 1, according to the invention, will become clearer with the following description of an embodiment thereof, given by way of non-limiting example, with reference to the attached drawings, in which:

- Figure 1 shows an axonometric view of the device as a whole and a section of the same.

- Figure 2 shows only the duct 2 both in an axonometric view and in a side view.

- Figure 3 and Figure 6 both show in axonometric view some geometries inherent to a terminal element 5.

- Figure 4 shows a connecting element 7 between element 5 and the inner tube 3.

- Figure 5 shows a side view of an assembly consisting of the tube 3 with the element 5.

- Figure 7 shows a side view of the device with a 15 bifurcation fitting.

- Figures 8 to 10 show some examples of use of the drainage device and in which the bifurcation 15 has been omitted only for purposes of descriptive clarity.

Description of a preferred embodiment With reference to Figure 1, a drainage device 1 according to the present invention is described.

A first conduit 2, for example a small tube suitable for transporting fluids, is combined with a second conduit 3 arranged inside it in a substantially coaxial manner. Section A-A, again in figure 1, shows the radius R <1> of the first duct 2 selected in such a way as to be greater than the radius R <2> of the second duct 3. In this way, a circular crown C is created within which a first fluid can flow, as better described below.

The term coaxial is here intended in a non-limiting way without absolutely implying a perfect centering of the second duct with respect to the first.

The difference in diameter between the first and the second duct has the additional function of making the second tube 3 slide with respect to the first, simply by means of a pulling or pushing action.

Again as shown in the axonometric view of figure 1, the first duct 2 comprises an opening 4 through which the second duct 3 emerges. One or more openings 6 are then arranged along the duct and configured to allow an outflow towards the external or aspiration of a fluid.

Figure 2 shows an axonometric view and a side view of the first duct 2 only. The opening 4 is therefore configured in such a way as to allow easy exit of the second duct 3 so that it can easily slide towards the € ™ external or partially or totally retracted into the first duct. For this purpose, the side view indicates a height of the opening L preferably within a range between 1 centimeter and 3 centimeters even if different lengths can easily be realized. The width W must naturally be greater than the diameter of the second duct 3 to allow it to escape. An indicative width may, for example, correspond to approximately 1/4 of the overall circumference of the first duct 2. This dimension avoids the risk of inflections of the first duct during its push into the patient.

Again the opening 4 can then conveniently be set up at a predetermined height or distance h of the first duct 2 with respect to its apex 3â € ™. The height can vary freely according to the chosen length of the duct 2. Only by way of example, a value of height h of about 16 cm is shown on a tube 2 with a total length of about 30 cm (the example refers to a model 28F, i.e. radius R <1> of about 4.612 mm).

As shown in Figure 3, a terminal element 5, made of flexible material such as rubber or the like, comprises a plurality of holes 8 and / or channels 9 and preferably with a suction function but, possibly, also as a fluid injection.

In the case of suction, the fluid enters the main section of element 5 through the holes and / or channels and then rises along it. Conversely, in the case of injection, the fluid escapes from the holes or channels towards the outside.

Figure 4 shows an axonometric view of a connecting element 7 generally configured in the shape of a V. The connecting element is hollow inside it in a passing way in order to allow the passage of fluid.

Figure 5 shows how the connecting element makes it possible to connect the small tube 3 to the terminal element 5.

Both figure 3 and figure 6 show various possible constructive solutions of constructive sections for the terminal element 5. For example, figure 3 shows a rectangular 11 or quadrangular section 11 in which the walls 10 constituting the section form a duct 11 within from which the aspirated or injected fluid rises or escapes through the holes 8. Similarly, another solution presented again in figure 3 shows an H-section provided with wings 12 which generate the channels 9 into which the fluid rises / exits.

Figure 6 shows other examples including an X section generating 13 channels or a simple H section with 14 channels.

The assembly of figure 5, in which the small tube 3 is connected by means of the fitting to the terminal element 5, can of course be made in separate parts and subsequently assembled or be made in a single piece.

Figure 7 shows a connection bifurcation 15 applied to the end of the device 1.

The external duct 2 alone, or the combination of the duct 2 with the terminal portion 5, may optionally comprise a reference of the radiographic type. This can for example include a line in a color which is visible on radiographs and which runs along the entire duct 2 and possibly along the terminal portion as well. Any numbering can be integrated in order to indicate a reference for the overall length of the duct. This solution is important to visually give the surgeon an idea, while working, of the position of the drainage device.

Having technically described the essential aspects, we now pass to a description of use.

Without any limitation to the present invention, an example in use is described in which the second channel 3 acts as an aspirator while the first channel 2 acts as an injector of physiological cleaning liquid. However, it is evident that it is possible in an indifferent way to reverse the roles.

For this purpose, Figure 8 shows a plurality of arrows applied to the first duct 2 and representing the passage of the first fluid (for example the physiological washing solution) along it. The fluid is sent into the duct 2 with a certain pressure through the connecting bifurcation 15 and then exits through the plurality of openings 6, in such a way as to invade the desired area to be treated. At the same time, again figure 8, shows a plurality of arrows applied to the terminal element 5 to indicate the suction action and the simultaneous rising of the collection fluid through the holes 8 along the tube 3.

Figure 9 shows, by way of example, how a thrust action S on the tube 3 (arrow applied to the end of the tube in question) allows its further outflow. In this way, by simply pushing or pulling the tube, the surgeon can easily reach different areas located at a distance from each other.

Figure 10 shows, for example, the case in which the tube 3 is completely retracted (see traction arrow T applied to the tube in question) to the point where the terminal element 5 is also brought back into the tube 2. It is evident that, although the connecting element can be made in various shapes, the shape V advantageously provides an opening which facilitates its passage through the opening 4.

The terminal element can of course be made of various lengths (for example around 20 cm) such as to allow easy wrapping of internal organs.

In this way the suction / washing operation is extremely efficient as it not only takes place through a plurality of holes or channels but also because these are arranged in such a way as to surround the entire area of interest.

Claims (10)

CLAIMS 1. A drainage device (1) comprising a first duct (2) and a second duct (3) and in which the second duct (3) is arranged substantially coaxial with respect to the first (2) and characterized in that the second conduit (3) slides with respect to the first conduit (2), the first conduit (2) comprising at least one opening (4) configured in such a way as to allow the second conduit (3) to pass outwards. 2. A drainage device (1), according to claim 1, in which the opening (4) is arranged at a distance h with respect to the apex (3 ') of the first duct (3). 3. A drainage device (1), according to claim 1 or 2, in which said opening (4) has a length L contained within a variable range from 1 cm to 3 cm and a width W such as to allow the passage towards the ™ outside the second duct (3). A drainage device (1), according to claim 1, wherein the second conduit (3) comprises a terminal element (5) comprising a plurality of holes (8) and / or guide channels (9; 13; 14) and configured in such a way as to convey / expel the fluid into / from the duct (3). 5. A drainage device (1), according to claim 4 or 5, wherein said terminal element (5) is made of flexible rubber so that it can be folded to at least partially surround a selected area. 6. A drainage device (1), according to claim 4, in which said terminal element (5) can have at least one of the following sections at choice: - H-section comprising four wings (12) arranged on the section in such a way as to form four channels (9); - Rectangular (11) or quadrangular (11) section and comprising a plurality of holes (8); - H section comprising two channels (14); - X section comprising four channels (13). 7. A drainage device (1), according to one or more preceding claims, in which a connection (7) is provided between the terminal element (5) and the second duct (3). 8. A drainage device (1), according to claim 7, in which said fitting is substantially V-shaped so as to form an opening for insertion into the opening (4). 9. A drainage device (1), according to one or more preceding claims, in which said terminal element (5), the duct (3) and the fitting (7) are made in a single piece. A drainage device (1), according to one or more preceding claims, in which a bifurcation element (15) is further provided for directing a first fluid along the first channel (2).