CN204745116U - A crossover sub that is used for connection center ductus venosus and ordinary drainage bag - Google Patents

Abstract

A conversion joint for connecting a central venous catheter and a common drainage bag, the conversion joint includes a rotary interface and a drainage interface. The inner wall of the rotating interface is provided with threads, the drainage interface is a conical structure of elastic material, and the drainage interface is socketed on the outer wall of the connecting pipe. The conversion joint can connect the common drainage bag with the central venous catheter, and the operation is simple, the connection is firm, and it is not easy to fall off, which can prevent the occurrence of chest infection or pneumothorax caused by loose connection, and can also avoid the risk caused by misconnection of other venous access . The adapter has extremely high clinical application value.

Description

Adapter for connecting central venous catheter and common drainage bag

technical field

The utility model relates to a medical device for closed chest drainage, in particular to a conversion joint for connecting a central venous catheter and a common drainage bag.

Background technique

Closed chest drainage is a common surgical operation, which is widely used in the drainage of hemothorax, pneumothorax, empyema and after thoracotomy, and plays a very important role in the treatment of diseases. In order to reduce drainage incisions and chest wall trauma, and reduce the incidence of complications, one end of a disposable central venous catheter is often placed in the patient's body, and the other end is connected to a drainage device such as a drainage bag for closed chest drainage. Closed thoracic drainage with a central venous catheter has the following advantages: simple and safe operation, successful catheter placement at one time, avoiding multiple punctures, and reducing pain for patients; soft catheter, good biocompatibility, small diameter, easy to tolerate by patients; It is firm and not easy to fall off, and the patient can move freely; the liquid can be drained or taken at any time according to the needs of the disease, for inspection and drug injection; the catheter care is simple. In view of this, intrathoracic indwelling central venous catheter therapy has been widely used and promoted in clinic.

However, there is no special drainage device connected with the central venous catheter at present, and a central venous catheter and a disposable common drainage bag are often used in clinical practice. However, the connector of the central venous catheter is a hollow cylindrical hard connector, and the tube connector of the ordinary drainage bag is a conical hard connector, and the two cannot be directly used together. Clinically, the central venous catheter is often connected to the disposable drainage bag through the intravenous infusion three-way tube and the rubber tube, or directly connected to the drainage bag with the rubber tube. However, such a connection method is difficult to operate and easy to fall off.

Clinically, an anti-reflux drainage bag with a screw port is also connected to a central venous catheter to achieve closed chest drainage. Since the antireflux bag has a threaded connector, it can be connected directly to a central venous catheter. However, because the connector of the anti-reflux drainage bag can be connected to all venous accesses, there is a risk of misconnection with other venous accesses. For example, the threaded connector can be connected to central venous catheters, indwelling needles, scalp needles, etc. In addition, the anti-reflux drainage bag is very similar to the ordinary drainage bag, it is easy to take it by mistake when taking it, and it will lead to waste after opening.

Utility model content

Based on many years of clinical treatment experience, the inventor has conducted long-term research on the problems existing in the above-mentioned prior art, and designed a conversion joint for connecting a central venous catheter and a common drainage bag. The conversion joint includes a rotary interface, a drainage The interface and the connecting pipe, one end of the connecting pipe is connected to the rotating interface, the other end of the connecting pipe is connected to the drainage interface, the inner wall of the rotating interface is provided with threads, the drainage interface has a conical structure, and the drainage interface is sleeved on the outer wall of the connecting pipe.

Further, the conical small-diameter end of the drainage interface is sleeved on the outer wall of the connecting tube.

Preferably, a seal is installed at the opening of the rotary interface.

Preferably, the conversion joint further includes a clamping piece.

More preferably, a one-way valve is arranged in the connecting pipe of the adapter.

Further, the connecting pipe of the conversion joint also includes a blocking piece used in conjunction with the one-way valve.

The beneficial effect of the utility model is that: the rotary interface of the conversion joint is provided with threads, which can rotate and cooperate with the joint of the central venous catheter, so as to ensure that the conversion joint is closely connected with the central venous catheter and is not easy to fall off. The drainage interface of the conversion joint is a conical joint made of elastic material, and the conical joint of the drainage bag can be inserted into the drainage interface of the conversion joint tightly, and the drainage bag is not easy to fall off. The clamping parts can also be used to further prevent the drainage bag from falling off from the conversion joint.

Using the conversion joint, the central venous catheter can be conveniently connected with the common drainage bag, the operation is simple, the connection is firm, and it is not easy to fall off, which can prevent the occurrence of chest infection or pneumothorax caused by loose connection. At the same time, the use of the conversion joint can realize the connection between the ordinary drainage bag and the central venous catheter, and it is not necessary to equip the anti-reflux drainage bag, which can avoid the waste of materials caused by the wrong use of similar products. At the same time, it can avoid the risk of misconnecting the anti-reflux drainage bag to other venous accesses.

Description of drawings

Figure 1 Schematic diagram of the first conversion joint.

Figure 2. Schematic diagram of an adapter with seal and clamp.

Figure 3 After the catheter connector of the drainage bag is inserted into the drainage interface of the conversion joint, the clamping part is stuck at the connection between the catheter connector of the drainage bag and the drainage interface.

Figure 4 is a conversion joint with a one-way valve, which is a schematic diagram of the one-way valve in an open state.

Figure 5 is a conversion joint with a one-way valve, which is a schematic diagram of the one-way valve in a closed state.

Detailed ways

As shown in Figure 1, the conversion joint used to connect the central venous catheter and the common drainage bag includes a swivel port 1, a drainage port 2, and a connecting tube 3 to connect the swivel port and the drainage port. A hollow through structure is formed between the rotating interface, the drainage interface and the connecting pipe. The inner side wall of the rotary interface 1 is provided with a thread 11, and the thread matches with the thread on the central venous drainage catheter connector, so that the conversion joint can be rotated and fixedly connected with the central venous drainage catheter. The drainage interface 2 has a conical structure and is made of elastic materials such as latex and medical silica gel. The drainage interface 2 of the conversion joint has the same conical structure as the catheter joint 8 of the drainage bag, so that the catheter joint 8 of the drainage bag can be easily inserted into the drainage interface 2, and is closely connected with the conversion joint so that it is not easy to fall off. And the drainage interface 2 made of elastic material can adapt to catheter joints of various diameters of the drainage bag. The connecting pipe 3 and the rotating interface 1 can be integrally formed, or the connecting pipe 3 and the rotating interface 1 can be manufactured separately and combined together. There is a sealing device at the connection between the connecting pipe and the rotating interface to ensure that the diversion fluid Will not flow from the junction of the two. The drainage interface 2 is sleeved on the outer wall of the connecting tube 3 , and in one embodiment, the conical small-diameter end of the drainage interface is sleeved on the outer wall of the connecting tube.

In the preferred solution of the conversion joint shown in FIGS. 2 and 3 , a seal 4 is installed at the opening of the rotary joint 1 . When in use, the medical personnel need to remove the sealing member before rotating the connecting head of the central venous catheter into the rotating interface 2 of the adapter. The step that the medical personnel need to tear off the seal can serve as a reminder that the currently used adapter is used to connect the central venous catheter, so as to avoid misconnecting the adapter with other venous accesses. In a more preferred solution, the seal of the rotary interface is printed with the word drainage, which further reminds the medical staff that the adapter needs to be connected to the central venous catheter. Before the conversion joint is used, the seal and the rotary interface are connected together. Once the adapter is used, the seal is separated from the swivel. Medical personnel can judge whether the current conversion joint has been used according to whether there is a seal on the rotary joint, so as to avoid the situation that the conversion joint is used twice. In another embodiment, the sealing member 4 further includes a sealing member pull-out 41 , and during use, the fingertips are buckled in the pull-out 41 , and the sealing member can be separated from the rotating interface by pulling it out forcefully.

In another preferred solution, the conversion joint further includes a clamping member 5, which can be clamped at the connection between the catheter connector 8 of the drainage bag and the drainage interface 2. As shown in Figure 3, when the drainage bag connector 8 is inserted into the drainage interface 2, the clamping member 5 moves to their connection and is tightly locked outside, thereby further ensuring that the catheter connector of the drainage bag will not fall off from the conversion joint .

In order to prevent liquid backflow, in a preferred solution, a one-way valve 6 is arranged in the connecting pipe 3 of the conversion joint, and the one-way valve can only be opened toward the drainage interface. As shown in Figure 4, when the drainage liquid flows into the drainage bag from the rotating interface 1 through the connecting tube 3, the one-way valve 6 is opened toward the opening of the drainage interface 2 along the direction of the liquid flow, so as to ensure the smooth circulation of the drainage fluid. As shown in Figure 5, when the drainage fluid in the drainage bag backflows back, since the one-way valve cannot be opened in the direction of the rotating interface, the fluid cannot flow back into the central venous drainage catheter. In a more preferred solution, the connecting pipe of the conversion joint also includes a stopper 7 used in conjunction with the one-way valve, and the stopper 7 can further block the movement of the one-way valve to the direction of the rotary interface 2 .

When performing closed thoracic drainage, put one end of the central venous catheter into the chest cavity of the patient, screw the other end of the central venous catheter on the rotary interface 1 of the conversion joint, and then insert the catheter connector 8 of the drainage bag into the conversion joint in the drainage interface 2. The central venous drainage catheter, the conversion joint and the drainage bag form a series structure of fluid communication to complete the closed chest drainage. The connection between the central venous catheter and the common drainage bag is realized by using the conversion joint. The operation is simple, the connection is firm, and it is not easy to fall off. It can prevent the occurrence of chest infection or pneumothorax caused by the loose connection. High application value.

Claims (6)

1. connect the adapter of central venous catheter and general drainage bag, it is characterized in that, described adapter comprises rotatable interface, drain interface and connection tube, one end of connection tube is connected to rotatable interface, the other end of connection tube is connected to drain interface, the medial wall of rotatable interface is provided with screw thread, and drain interface is conical structure, and drain interface is socketed in the outer wall of connection tube.

2. adapter according to claim 1, is characterized in that, the conical small-caliber end of described drain interface is socketed on the outer wall of connection tube.

3. adapter according to claim 1, is characterized in that, the opening part of described rotatable interface is provided with sealing member.

4. adapter according to claim 1, is characterized in that, described adapter also comprises a Fastener.

5. adapter according to claim 1, is characterized in that, is provided with check valve in the connection tube of described adapter.

6. adapter according to claim 5, is characterized in that, also comprises the matching used block piece with check valve in the connection tube of adapter.