CN207679835U - A kind of left heart drainage-tube automatically terminating absorption - Google Patents

Abstract

A left heart drainage tube that automatically releases adsorption. Through the inner elastic hose arranged inside the decompression part of the drainage tube, when negative pressure is generated in the drainage tube, the air pressure causes the inner elastic hose to deform so that the outside air can pass through the decompressed tube. The side hole on the inner part and the inner elastic hose enters the drainage tube to eliminate the negative pressure. After the negative pressure is eliminated, the inner elastic hose returns to its original shape, keeping the decompression part of the drainage tube airtight. After the drainage tube is absorbed, it can automatically correct the inside of the drainage tube Air pressure will not cause damage to the left endocardium, completely solving the problem of wall-adhering adsorption. In addition, because the negative pressure is stable, the blood or gas in the left heart system can be effectively drained, and the damage to blood components is also small, and it has the advantages of low manufacturing cost, simple operation, and convenient use.

Description

A left heart drainage tube with automatic desorption

Technical field:

The utility model relates to daily necessities for human beings, in particular to a medical device, in particular to a medical device for heart and blood vessel surgery, in particular to a left heart drainage tube for automatically desorbing.

Background technique

During heart surgery, it is necessary to drain the blood in the heart cavity to form a clear, bloodless surgical field of view to successfully complete the operation. A left heart drain is a drainage device placed in the left atrium or ventricle. At present, the left heart drainage tubes used in most hospitals are silicone tubes with a large number of side holes at one end. This drainage tube has many disadvantages. Especially due to the location and other reasons, the drainage tube is likely to be adsorbed to the left atrium (ventricular) wall, resulting in poor drainage, which makes the surgical field of vision unclear and the drainage tube is adjusted repeatedly, resulting in a relatively prolonged operation time and increased potential surgical risks. Moreover, the left ventricular drainage tube not only loses the drainage effect after being attached to the wall, but also causes damage to the endocardium due to excessive negative pressure, which brings risks to patients during surgery.

In the prior art, the adsorption is usually reduced by adding protrusions on the side wall of the drainage tube, but the protrusions will make it difficult for the drainage tube to go deep into the narrow position, which may easily cause adverse consequences of insufficient deep blood drainage. There is also a method of setting a ventilation plug on the drainage tube to manually open the ventilation plug to eliminate the negative pressure in the drainage tube to release the adsorption when adsorption occurs. This method has the defects of complex structure, dependence on the observation of the operator, and untimely response, which still exist. Risk of damage to the endocardium.

Utility model content

The purpose of this utility model is to provide a left heart drainage tube which has a simple structure, does not increase the external size of the drainage tube, and can automatically and timely release the adsorption in order to solve the above-mentioned defects in the prior art.

Its main working principle is that through the inner elastic hose arranged inside the decompression part of the drainage tube, when negative pressure is generated in the drainage tube, the air pressure will deform the inner elastic hose so that the outside air can pass through the decompression part and the inner elastic soft tube. The side hole on the tube enters the drainage tube to eliminate the negative pressure. After the negative pressure is eliminated, the inner elastic hose returns to its original shape, so that the decompression part of the drainage tube remains airtight.

In order to achieve the above purpose, the utility model adopts the following technical solutions: including a drainage tube, including a drainage tube, wherein, the drainage tube is a long hollow cylinder structure, including a negative pressure interface at the proximal end, a decompression in the middle section part and the drainage part at the far end, the drainage part is provided with more than two side holes on the tube wall, the end of the drainage tube is a blind end and is adjacent to the drainage part, and the decompression part is arranged inside There is an inner layer elastic hose, the outer wall of the inner layer elastic hose is closely attached to the inner wall of the decompression part, the outer walls of both ends of the inner layer elastic hose are sealed and connected with the inner wall of the decompression part, and the inner wall of the decompression part The pipe wall and the pipe wall of the inner elastic hose are respectively provided with two or more side holes, and the positions of the side holes on the pipe wall of the decompression part are all staggered from the positions of the side holes on the pipe wall of the inner elastic hose.

Further, the tube walls of the decompression part and the drainage part are both made of rubber tubes or silicone tubes.

Further, the diameter of the drainage tube is between 2mm and 10mm.

Further, the end of the drainage tube is a blind end with a spherical or parabolic surface.

Compared with the prior art, the utility model has positive and obvious effects. The utility model has the advantages of low manufacturing cost, simple operation and convenient use. There is no need to adjust the number of side holes and the depth of the drainage tube. After the drainage tube is adsorbed, the air pressure in the drainage tube can be automatically corrected, which will not cause damage to the left endocardium, and completely solve the sticking problem. In addition, due to the stable negative pressure, the blood or gas in the left heart system can be effectively drained, and the damage to blood components is also small.

Description of drawings:

Fig. 1 is a structural diagram of the utility model.

Detailed ways:

Example 1:

As shown in Figure 1, a left heart drainage tube that automatically desorbs, including a drainage tube, is characterized in that the drainage tube is a long hollow cylinder structure, with a negative pressure interface 1 at the proximal end and a decompression in the middle section. part 2 and the drainage part 3 at the far end, the drainage part 3 has a plurality of side holes 6 and the top end is a blind end 4, the inner layer of the decompression part 2 is provided with an inner elastic hose 5, and the inner elastic soft The tube 5 is in close contact with the inner tube wall of the decompression part 2 and the two ends of the inner elastic hose 5 are sealed and connected with the inner tube wall of the decompression part. The decompression part 2 and the inner elastic hose 5 All have a plurality of side holes, and the positions of the side holes 7 of the decompression part and the side holes 8 of the inner layer elastic hose are staggered and do not communicate. In a normal state, the drainage tube mainly drains blood or gas in the heart cavity through the drainage part 3, and the decompression part 2 does not work. If the drainage part 3 sticks to the wall and the drainage is not smooth, the inner elastic hose of the decompression part will be deformed due to the increase of negative pressure in the drainage tube. And the side hole on the elastic hose enters to relieve the negative pressure in the drainage tube. After the negative pressure is released, the elastic hose on the inner layer returns to the state of being tightly attached to the inner wall of the decompression part due to the rebound effect, and the drainage part continues to work.

Further, as shown in FIG. 1 , the drainage tube is made of rubber or silicone except for the negative pressure interface 1 .

Further, the diameter of the drainage tube is between 2mm and 10mm.

Further, as shown in FIG. 1 , the top end of the drainage part is in a blunt round shape, which can effectively avoid damage to the endocardium when in contact with the heart.

Claims (4)

1. a kind of left heart drainage-tube automatically terminating absorption, including a drainage tube, which is characterized in that the drainage tube is strip Hollow cylinder structure, includes the conduction part of the negative port of proximal end, the relief portion in stage casing and distal end, and the conduction part exists The side opening of more than two numbers is provided on tube wall, the end of drainage tube is cecum and relief portion adjacent with conduction part, described Inside is provided with an internal layer elastic hose, the outer wall of internal layer elastic hose and the inner wall of relief portion fit closely, The both ends outer wall of internal layer elastic hose and the inner wall sealing of relief portion connect, the tube wall of the tube wall and internal layer elastic hose of relief portion On be respectively arranged with the side openings of more than two numbers, the side opening position on relief portion tube wall on internal layer elastic hose tube wall Side opening position is staggered.

2. the left heart drainage-tube as described in claim 1 for automatically terminating absorption, it is characterised in that：The pipe of relief portion and conduction part Wall is made of rubber tube or silicone tube.

3. the as claimed in claim 1 or 2 left heart drainage-tube for automatically terminating absorption, which is characterized in that the drainage tube it is straight Between diameter is 2 millimeters to 10 millimeters.

4. the left heart drainage-tube as claimed in claim 1 or 2 for automatically terminating absorption, which is characterized in that the end of drainage tube is Cecum end face is spherical or paraboloid.