DK200900040U1 - Apparatus for removing fluid or air accumulations below skin level - Google Patents

Description

DK 2009 00040 U3

Denominations

Apparatus for removing liquid or air amylines below skin level.

The invention relates to an apparatus for removing fluid or air accumulations below the skin level of a human or animal, which apparatus comprises a cannula for piercing the skin and a suction and collecting device for aspirating the liquid via the cannula. This is for example. on fluid retention or air retention in relation to surgical procedures, or solely discharge of fluid retention in e.g. knees or other tissues with cavities or other organ regions, e.g. gastrointestinal region or heart / lungs.

The prior art

After several types of surgical procedures, but especially after surgery for breast cancer, fluid accumulations often occur during the operation wound. Also after vascular surgery in e.g. the groin regions are fluid accumulations frequently after surgery. Furthermore, fluid accumulations may be present in the knees, in the lungs, around the heart, or in the abdominal cavity, e.g. in conditions of infection or heart / lung / liver disease. Fluid accumulation in the lungs or abdomen is also often seen in patients with severe cancer. When depleting liquid accumulations in these conditions, various systems are used today, i.a. just a cannula mounted on a syringe or various compound systems with three-way taps, hoses, needles and syringes. If a drain hose is fitted, it is most often carried today to an open container (capsule, plastic / glass container), or a collection bag.

When using a needle on a syringe, the fluid discharge is made difficult, among other things. by removing the cannula mounted on the syringe up to several times to drain the extracted liquid. In case a three-way cock is fitted, it must be rotated alternately between suction and discharge position, while the mounted syringe must be actively pulled out to extract the liquid and then pressed in to drain the syringe via a drain which is usually via a type of hose is transported to an open container (capsule, plastic / glass container) or a 2 collection bag, e.g. of plastic. Finally, the drain hose must also be handled in relation to the drain.

When discharging fluid after breast surgery (seroma accumulation) it is often advantageous to be 2 people. One person applies a suction by holding the plunger rod out of the syringe, while the other hand moves the liquid over to the place where the cannula is pierced the skin. In this way, you can get a more complete emptying without piercing the skin several times, thereby reducing the risk of infection. By this method, a negative pressure can also be established inside the cavity where the liquid has been collected. This negative pressure causes the surface of the skin to be sucked into the chest wall. This may increase the possibility of grafting and thereby prevent new fluid accumulation.

The procedure for discharging liquid or air from cavities below skin level can, as is most commonly performed today, be divided into: A. Needle mounted on syringe 1. Insertion of the needle into cavities with liquid or air.

2. Retention of the puncture cannula at a certain position, and often with a certain desired depth of the needle tip under the skin.

3. Pull out the plunger on the syringe to fill the syringe with liquid / air from the cavity.

4. Separate syringe and needle.

5. Empty the contents of the syringe into the collection container (capsule, plastic / glass container) 6. Re-assemble the needle and syringe.

7. Extract any liquid or air from the cavity again. 3-7 is repeated until all liquid or air is extracted from the cavity.

3 GB 2009 00040 U3 B. Needle mounted on syringe with three-way cock 1. Insert the needle into the cavity with liquid or air.

2. Retention of the puncture cannula at a particular position and with the needle tip placed at a certain depth under the skin.

3. Pull out the plunger on the syringe to extract liquid or air from the cavity.

4. Turn the three-way cock away from the starting position. Press the plunger on the syringe to empty the contents of the syringe into the collection unit: capsule, plastic / glass container, or collection bag.

5. Turn the three-way cock back to the starting position, in order to repeat the procedure as mentioned in cl. 3-5.

6. Procedure Points 3-5. repeated until all the liquid or air from the cavity below the skin level is depleted.

All in all, several sub-procedures that can be difficult to perform by one person alone, especially where the system is disassembled. (Sections 3 to 7). This may result in incomplete emptying of liquid or air as well as breakage of the aseptic procedure, e.g. reflux of fluid or air from the cannula into the cavity, with subsequent increased risk of infections. Likewise, handling the depleted fluid in open vessels / containers is both unhygienic and unpleasant for patients to experience.

From US Patent No. 4,435,170, a blood collection kit is known which comprises a handheld control device which is firmly connected to a rigid suction tube. A hose connected to the rigid suction pipe extends through the control apparatus, which can be clamped together more or less by means of a clamping mechanism. At the other end, the hose is connected to a collection vessel which communicates with a vacuum source. The suction tube is provided with side holes at the front end and is thereby adapted for aspiration of tissue fluids from open cavities, ie. typically in connection with surgical procedures.

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Purpose of creation

The object of the invention is to provide an apparatus which permits the penetration of intact skin to, during the same procedure and without changing or separating the individual parts, to extract liquid from a closed cavity into a container.

This is achieved according to the invention in that the cannula is connected to the mouth of a gun-like handle and in the gun-like handle connected to a first end of a conduit, the other end of which is connected to the suction and collection device, and that the handle has a closing mechanism which cooperates with the wire and actuated to open for passage of the liquid by actuating one trigger of the gun-like lever belonging to the action of a drive device which preloads the trigger into a sealing starting position.

The use of a needle that is suitably sharp in combination with the gun-like handle enables relatively easy and controlled penetration of intact skin, the user having a good grip in the apparatus, due to the gun-like handle, while allowing the action of the trigger effective control of the suction process. The handle enables a relatively precise positioning of the tip of the cannula both in terms of direction and depth of insertion, relative to the underlying tissue, and at the same time the user has a hand free to be able to influence the affected area of the skin and push fluid to the tip of the cannula. Hereby, it is possible to easily establish a vacuum in the cavity, whereby the surfaces can be held together so that, if desired, an acceleration of the waxing of the respective surfaces is ensured. During the extraction of the cannula, suction can still be maintained at the tip of the cannula, thereby ensuring that the cavity is left in vacuum. The presence of a vacuum in the cavity also causes the small blood vessels in the surface to burst. This minimal damage to the surface can promote subsequent coalescence, thereby reducing the likelihood of subsequent fluid formation. The procedure in question is unambiguous and repeatable, so that the discharge of liquid or air from the cavity can be carried out in the same way each time and by one person only by using the apparatus of the invention, which is a closed system in a vacuum, and if parts do not require separation during use, the likelihood of fluid and air return to the patient's cavity is sucked during treatment, thereby reducing the risk of infection. The closed system also means that discomfort due to the odor of the liquid is reduced. The gun-like handle puller allows for both easy sensation of needle movement and control of fluid or air flow rates through the conduit.

According to the invention, the closing mechanism can be a valve device with a valve body which is brought into the closing position by actuation of the vacuum of the suction and collection device. This opens up the possibility that the closing mechanism can be manufactured in an easy and inexpensive way.

Furthermore, the conduit is a flexible hose, one end of which is directly connected to the cannula and the other end of which is connected to the suction and collection device, and the closure mechanism of the handle can be a hose clamping mechanism, thereby ensuring a particularly close connection between the cannula and the suction and collection device. .

In addition, according to the invention, the cannula may conveniently be removably connected to the mouth of the handle via a luer coupling.

According to the production, the hose clamping mechanism may comprise a fixed abutment for the hose while the trigger is hinged around a pivot axis and preloaded into an unactivated position about this pivot axis by means of a spring device, having a projection for said pawl. installing and compressing the hose in this position and releasing the hose by manually activating the trigger to rotate about the axis of rotation in the direction of the preload force of the spring device. This provides a particularly simple closure mechanism in connection with a hose connection between the cannula and the suction and collection device.

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According to the invention, the suction and collection device may be a vacuum container with a pre-provided vacuum, thereby avoiding the use of a separate vacuum source.

Finally, according to the invention, the vacuum container may have a closable inflow nozzle through which it is connected to the other end of the hose so that reflux can be avoided.

The invention is described in more detail below with reference to the drawing, in which Figure 1 shows a schematic representation of an apparatus according to the invention, and Figure 2 shows a gun-like handle with a hose clamping mechanism, in section, and Figure 3 schematically a closing mechanism whose function can be controlled by vacuum.

The apparatus shown in Figure 1 comprises a gun-like handle shown by the general reference numeral 1 and comprising a grip 2, a trigger 3 and a barrel 4. At the front end of the barrel a cannula 5 is mounted, which via a luer coupling 6 is connected to a hose 7 which extends partially through the barrel 4 of the gun-like handle 1 and passes out and communicates with a vacuum container shown by the general reference numeral 8. The vacuum container is of a generally known type such as that which is disclosed in U.S. Patent No. 4,376,439. It has a schematically shown device 9 which is arranged to show if there is a vacuum of a certain size in the container 8 and thus also to show when this is no longer the case as a result of the container being filled up to a predetermined limit. The gun-like handle 1, seen in cross section in Figure 2, is made of a suitable plastic material and has a cover 10 which allows easy access to the interior of the handle. This cover is of a type that is cast integrally with the other part of the handle via a plastic hinge and is arranged to be able to be fastened to the other part of the handle via a snap connection, which is not shown in detail. .

The trigger 3 is molded in the same material and has a tab 11, which at each side is extended through a hole 12 on each side of the handle 2.

The trigger 3 is thereby pivotally mounted on the handle 2. As schematically shown in Figure 2, between the handle 2 and the trigger 3 is arranged a spring device 13, which pushes the trigger 3 in a clockwise direction around the pin 11, whereby a projection 14 on the trigger 3 is pressed against an abutment 15 so that the hose 7 passing through a hole 16 in the barrel 4 and between the abutment 15 on the barrel 4 and the projection 14 on the trigger 3 is clamped between the abutment 14 and the abutment 15. This closes the passage through the hose 7 between the projection 14 and the plant 15. Upon activating the trigger 3, ie. pressing the trigger 3 so that it is rotated counterclockwise around the pin 11, the hose 7 is released for compression and the passage is opened.

The cannula 5 is of generally known type with a sharp tip 17.

The hose 7 is connected to the vacuum container 8 by means of a further luer coupling 18, and the inlet plug 19 of the vacuum container 8, which is preferably of rubber, can be clamped by a clamping device 20, which is shown in dotted lines.

When using the apparatus according to the invention, the user engages grip 2 of the gun-like handle 1 and pulls 3 and maneuvers the cannula through the skin into the cavity from which the liquid or air is to be removed. The holding of the gun-like handle 1 around the handle 2 and the trigger 3 enables easy handling of the apparatus with one hand while keeping the other hand free to affect adjacent areas of the skin and the cavity concerned. The vacuum in the vacuum container 8 is easily connected to the interior of the cannula and thus the cavity concerned by pressing the trigger 3 so that liquid extraction can be effected which is transferred to the vacuum container 8 via the hose 7. Throughout the treatment by means of of the apparatus according to the invention, a closed system is operated which operates with a vacuum which is independent of other vacuum sources and which is supplied exclusively with the vacuum container 8. When it is desired to interrupt the flow of the liquid and air through the hose 7, only the trigger 3 is released.

The gun-like handle can have many different shapes and can be shaped in different ways. In Figure 3, the trigger is indicated by the reference numeral 3 with the pivot pin 11. The trigger 3 is shown in the pressed position. It is here connected to a piston-like valve body 20 which is slidably mounted in a valve housing 21. The valve housing 21, together with the valve body 20, defines a space 22 which is connected to a conduit 23 connected to the vacuum vessel 8 and a conduit 24. connected to the catheter 5. In the shown position of the trigger 3, it has been moved in the direction indicated by an arrow 25, whereby there is a vacuum connection between the vacuum vessel 8 and the cannula 5 via the space 22. Upon release of the trigger 3, the piston-like valve body 20 in the direction shown by an arrow 26 to the right in Figure 3 until a flat projection 27 abuts the inlet to the conduit 24 and closes the connection therewith. In this position, the trigger 3 is in the unaffected or unactivated position. This avoids the use of a metal spring device.

The valve arrangement shown is only shown schematically and can take many different forms.

The apparatus of the invention has been described with reference to preferred embodiments. Many changes can be made without departing from the idea of creation. For example, the cannula 5 may be attached to the gun-like handle and the individual parts may be made of such materials as are suitable for single use.

Claims (7)

9 DK 2009 00040 U3 Bruas model requirements An apparatus for removing fluid or air accumulations below the skin level of a human or animal, comprising an cannula (5) for piercing the skin and a suction and collecting device (8) for aspirating the liquid via the cannula (5), which is new in that the cannula (5) is connected to the mouth of a gun-like handle (1) and in the gun-like handle (1) to a first end of a conduit (7; 23, 24), the second end of which is connected to the suction. and the collecting device (8), and the handle (1) has a closure mechanism (14,15; 20, 27) which cooperates with the conduit (7; 23, 24) and is actuated to open the passage of the liquid by actuation of a gun-like one. lever (1) belonging to trigger (3) against the action of a drive device which preloads trigger (3) into a sealing starting position. Apparatus according to claim 1, which is new in that the closing mechanism (20, 27) is a valve device with a valve body (20, 27) which is brought into the closing position by actuation of the vacuum of the suction and collection device (8). Apparatus according to claim 1, which is new in that the conduit (7; 23, 24) is a flexible hose, one end of which is directly connected to the cannula (5) and the other end of which is connected to the suction and collection device ( 8) and that the handle closing mechanism (14,15) is a hose clamping mechanism. Apparatus according to claim 1,2 or 3, which is new in that the cannula (5) is removably connected to the mouth of the handle (1) via a Luer coupling (6). Apparatus according to claim 3, which is new in that the hose clamping mechanism (16,18) has a fixed abutment (15) for the hose (7; 23, 24) in the handle (1) and the trigger (3) is hinged. about a pivot axis and preloaded into an unactivated position about that pivot axis by a spring device (13), having a projection (14) for pressing the hose against said abutment (15) and compressing the hose (7; 23, 24) in this position and releasing the hose (7; 23, 24) by manually activating the trigger DK 2009 00040 U3 10 (3) for rotation about the axis of rotation in the direction of the spring force of the spring device. Apparatus according to claim 1 or 2, which is new in that the suction and collection device (8) is a vacuum container with a pre-provided vacuum. Apparatus according to claim 1,2 or 3, which is new in that the vacuum container (8) has a closable inflow nozzle (19) through which it is connected to the other end of the conduit (7; 23, 24).