Thoracic double-tail fiber silicone drainage catheter, puncture drainage device and method

Abstract

The present invention relates to a thoracic double-tail fiber silicone drainage catheter, and belongs to the technical field of medical devices. The drainage catheter comprises a first spiral tube segment, a straight tube segment and a second spiral tube segment connected in sequence, the second spiral tube segment being perpendicular to the straight tube segment, and the second spiral tube segment also maintains spatial verticality with the first spiral tube segment. The diameter of the drainage catheter is 1.0-1.2 mm, and the tails of the first spiral tube segment and the second spiral tube segment are respectively and evenly provided with a plurality of side holes, and the aperture of the side holes is 0.063 mm. In the drainage catheter structure of the present invention, the second spiral tube segment located on one side of the amniotic cavity can be close to the outside of the fetal chest wall, reducing the risk of displacement and falling off caused by fetal grasping or fetal activity. If the drainage catheter is still in place after the delivery of the newborn, a negative pressure drainage device can be directly connected for drainage to avoid re-puncture after delivery. In addition, the diameter of the drainage catheter is reduced, and the side holes at the tails of the two spiral tube segments are attached, which can reduce the possibility of blockage of fetal fat and fetal hair in the drainage catheter lumen.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices and relates to a thoracic double-tail fiber silicone drainage catheter, a puncture drainage device and a method. Background Art

[0002] Fetal pleural effusion is a phenomenon in which abnormal body fluid accumulates in the pleural cavity due to various factors during fetal development. Primary pleural effusion is mostly caused by congenital chylothorax due to abnormal development of lymphatic vessels in the embryonic period. If severe pleural effusion is not intervened before birth, the fetal mortality rate is about 62%. Common intrauterine treatment methods include thoracentesis, thoraco-amniotic drainage and pleurodesis. Among them, thoraco-amniotic drainage is a method of continuously draining pleural effusion into the amniotic cavity through a drainage tube to continuously reduce the amount of pleural effusion, which can relieve the increased intrathoracic pressure and thus reduce the risk of pulmonary dysplasia. Fetal thoraco-amniotic drainage can effectively improve its pregnancy outcome.

[0003] At present, the drainage tubes used for fetal chest drainage mainly include: Harrisoncatheter (Cook Inc., Bloomington, IN), Rocketcatheter (Rocket Co. Inc., Branford, CT), and double-basketcatheter (Hakko Co., Nagano, Japan). However, during the intrauterine operation, these drainage tubes are likely to be displaced, dislocated, or blocked. The drainage tubes may even fall into the fetal chest cavity and need to be removed by thoracoscopy after birth. More importantly, most children with intrauterine chest-amniotic drainage need to undergo closed chest drainage treatment again immediately after delivery, but the above-mentioned intrauterine drainage tubes currently in the world need to be removed immediately after delivery and cannot be continued to the drainage treatment of the newborn. Summary of the invention

[0004] The present invention aims to provide a thoracic cavity double-tail fiber silicone drainage catheter which is not easy to be blocked, shifted or fallen off. The present invention also provides a puncture drainage device and method using the drainage catheter.

[0005] The technical solution adopted by the present invention is:

[0006] A thoracic double-tail fiber silicone drainage catheter comprises a first spiral tube segment, a straight tube segment and a second spiral tube segment connected in sequence, wherein the second spiral tube segment is perpendicular to the straight tube segment, and the second spiral tube segment also maintains spatial verticality with the first spiral tube segment; the length of the straight tube segment is 25-35 mm, and the lengths of the first spiral tube segment and the second spiral tube segment after extension are both 30 mm; the diameter of the drainage catheter is 1.0-1.2 mm, and the tails of the first spiral tube segment and the second spiral tube segment are respectively and evenly provided with a plurality of side holes.

[0007] Furthermore, the diameter of the side hole is 0.063 mm.

[0008] The puncture and drainage device comprises a negative pressure drainage device, the above-mentioned thoracic double-tail fiber silicone drainage catheter, a guide wire that can be inserted into the drainage catheter, a puncture sleeve for inserting the drainage catheter, a puncture needle core matching the puncture sleeve, and a first thruster and a second thruster that can be inserted into the puncture sleeve for separating the puncture sleeve and the drainage catheter; the length of the puncture sleeve is equal to the sum of the length of the first thruster and the extended second spiral tube segment, and the length of the second thruster is equal to the length of the puncture sleeve; the negative pressure drainage device is connected to the tail joint of the second spiral tube segment and is used for negative pressure drainage of pleural effusion.

[0009] The puncture and drainage method, using the above-mentioned puncture and drainage device, comprises the following steps:

[0010] Step 1: insert the puncture needle core into the matching puncture cannula, and insert the guide wire into the drainage catheter;

[0011] Step 2: Under ultrasound positioning, puncture the pregnant woman's abdominal wall into the uterus, avoid the fetal heart and lung tissue, puncture the puncture needle core and the puncture cannula into the chest cavity as a whole, pull out the puncture needle core, use a syringe connected to the puncture cannula to extract, if pleural effusion is extracted, it means that the puncture cannula has entered the chest cavity;

[0012] Step 3: insert the first spiral tube section of the drainage catheter together with the guide wire therein into the chest cavity through the puncture cannula, fix the drainage catheter, and then remove the guide wire; fully insert the first pusher into the puncture cannula, slowly withdraw the entire puncture cannula to the outside of the chest cavity, then remove the first pusher, replace the second pusher and fully insert it into the puncture cannula, so that the second spiral tube section of the drainage catheter is placed outside the chest wall; after confirming the position of the drainage catheter under ultrasound, remove the puncture cannula and the second pusher;

[0013] Step 4: Connect the tail connector of the second spiral tube section of the drainage catheter outside the chest wall to the threaded connection port of the negative pressure drainage device to drain the pleural effusion under negative pressure.

[0014] The beneficial effects of the present invention are:

[0015] (1) The second spiral tube section located on the side of the amniotic cavity can be close to the outside of the fetal chest wall, reducing the risk of displacement or dislocation caused by fetal grasping or fetal movement. After the delivery of the newborn, if the drainage catheter is still in place, it can be directly connected to a negative pressure drainage device for drainage to avoid re-puncture after delivery.

[0016] (2) The inventors found in clinical treatment that reducing the diameter of the drainage catheter and adding side holes at the tail of the two spiral tube sections can reduce the possibility of blockage of the drainage catheter lumen by fetal fat and fetal hair. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the invented double-tail fiber silicone drainage catheter;

[0018] Figure 2 It is a structural schematic diagram of the puncture needle core and the puncture cannula;

[0019] Figure 3 is a schematic diagram of the structure of the guide wire;

[0020] Figure 4 is a schematic diagram of the structure of the first propeller and the second propeller;

[0021] Figure 5 is a schematic diagram of the structure of a negative pressure drainage device;

[0022] Figure numerals: 1-first spiral tube segment, 2-straight tube segment, 3-second spiral tube segment, 4-side hole, 5-puncture needle core, 6-puncture cannula, 7-guide wire, 8-first propeller, 9-second propeller, 10-negative pressure drainage device. DETAILED DESCRIPTION

[0023] The thoracic double-tail fiber silicone drainage catheter, puncture drainage device and method of the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] like Figure 1 The thoracic double-tail fiber silicone drainage catheter shown includes a first spiral tube segment 1, a straight tube segment 2, and a second spiral tube segment 3 connected in sequence, the second spiral tube segment 3 is perpendicular to the straight tube segment 2, and the second spiral tube segment 3 also maintains spatial verticality with the first spiral tube segment 1. The length of the straight tube segment 2 is 25-35mm, and the lengths of the first spiral tube segment 1 and the second spiral tube segment 3 after extension are both 30mm, that is, the overall extension length of the drainage catheter is 85-95mm. The diameter of the drainage catheter is 1.0-1.2mm, and the tails of the first spiral tube segment 1 and the second spiral tube segment 3 are evenly opened with a plurality of side holes 4 (the side holes are through holes opened on the tube wall and connected to the tube cavity), and the aperture of the side hole 4 is 0.063mm.

[0025] Drainage devices, see Figures 2 to 5, including a negative pressure drainage device 10, the above-mentioned thoracic double-tail fiber silicone drainage catheter, a guide wire 7 that can be inserted into the drainage catheter, a puncture sleeve 6 for insertion of the drainage catheter, a puncture needle core 5 matching the puncture sleeve 6, and a first propeller 8 and a second propeller 9 that can be inserted into the puncture sleeve 6 for separating the puncture sleeve 6 and the drainage catheter. The length of the puncture sleeve 6 is equal to the sum of the lengths of the first propeller 8 and the second spiral tube segment 3 after extension, and the length of the second propeller 9 = the length of the puncture sleeve 6. The negative pressure drainage device 10 is connected to the tail joint of the second spiral tube segment 3 and is used for negative pressure drainage of pleural effusion. In this embodiment, the model of the puncture sleeve 6 is 22 / 21G, L200mm. The model of the puncture needle core 5 is 22 / 21G, L200mm. The length of the drainage catheter is 85-95mm. The length of the guide wire 7 is L200mm. The length of the first propeller 8 is L170mm. The length of the second thruster 9 is L200 mm.

[0026] The puncture and drainage method, using the above-mentioned puncture and drainage device, comprises the following steps:

[0027] Step 1: insert the puncture needle core 5 into the matching puncture cannula 6, and insert the guide wire 7 into the drainage catheter.

[0028] Step 2: Under ultrasonic positioning, puncture the pregnant woman's abdominal wall into the uterus, avoiding the fetal heart and lung tissue. After puncturing the puncture needle core 5 and the puncture cannula 6 as a whole into the chest cavity, pull out the puncture needle core 5, and use a syringe connected to the puncture cannula 6 for extraction. If pleural effusion is extracted, it means that the puncture cannula 6 has entered the chest cavity.

[0029] Step 3: Place the first spiral tube section 1 of the drainage catheter together with the guide wire 7 therein into the chest cavity through the puncture cannula 6. After fixing the drainage catheter, remove the guide wire 7. Fully insert the first propeller 8 into the puncture cannula 6, slowly withdraw the entire puncture cannula 6 to the outside of the chest cavity, then remove the first propeller 8, replace the second propeller 9 and fully insert the puncture cannula 6, so that the second spiral tube section 3 of the drainage catheter is placed outside the chest wall. After the position of the drainage catheter is confirmed under ultrasound, remove the puncture cannula 6 and the second propeller 9.

[0030] Step 4: Connect the tail connector of the second spiral tube section 3 of the drainage catheter outside the chest wall to the threaded connection port of the negative pressure drainage device 10 to drain the pleural effusion under negative pressure.

[0031] The inventors have conducted a large number of clinical trials and found that when the length of the straight tube section 2 of the drainage catheter is controlled at 25-35 mm and the overall length of the drainage catheter is shortened to 85-95 mm, the effect of reducing the risk of displacement and falling off caused by fetal grasping or fetal activity is the best. In addition, by reducing the diameter of the drainage catheter and adding side holes at the tail of the two spiral tube sections, it is less likely that the drainage catheter lumen will be blocked by fetal fat and fetal hair.

[0032] The above are only specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any replacement or transformation methods that can be easily thought of by any technician familiar with the technical field within the scope of the technical method disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A thoracic double-tail fiber silicone drainage catheter, comprising a first spiral tube section (1), a straight tube section (2) and a second spiral tube section (3) connected in sequence, characterized in that: The second spiral tube section (3) is perpendicular to the straight tube section (2), and the second spiral tube section (3) also maintains spatial perpendicularity with the first spiral tube section (1); the length of the straight tube section (2) is 25-35 mm, and the lengths of the first spiral tube section (1) and the second spiral tube section (3) after extension are both 30 mm; the diameter of the drainage catheter is 1.0-1.2 mm, and the tails of the first spiral tube section (1) and the second spiral tube section (3) are respectively evenly provided with a plurality of side holes (4), and the diameter of the side holes (4) is 0.063 mm; the thoracic double-tail fiber silicone drainage catheter is used for drainage of fetal pleural effusion.

2. A puncture drainage device, characterized in that: The invention comprises a negative pressure drainage device (10), the thoracic double-tail fiber silicone drainage catheter according to claim 1, a guide wire (7) that can be inserted into the drainage catheter, a puncture sleeve (6) that can be inserted into the drainage catheter, a puncture needle core (5) that matches the puncture sleeve (6), and a first thruster (8) and a second thruster (9) that can be inserted into the puncture sleeve (6) for separating the puncture sleeve (6) and the drainage catheter; the length of the puncture sleeve (6) is equal to the sum of the lengths of the first thruster (8) and the extended second spiral tube segment (3), and the length of the second thruster (9) is equal to the length of the puncture sleeve (6); the negative pressure drainage device (10) is connected to the tail joint of the second spiral tube segment (3) and is used for negative pressure drainage of pleural effusion.

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