Safety anti-blocking drainage tube for neurosurgery

Abstract

The application discloses a safe anti-blocking drainage tube for nerve surgery, which can be used in neurosurgery, spine and spinal cord surgery or spine endoscope surgery and comprises a flexible drainage tube body and a removable flexible support body arranged in the flexible drainage tube body. A plurality of through holes are formed in the circumferential side wall of the extension end of the flexible drainage tube body. The flexible support body is in a trilobal, cross or strip support structure, and the front end of the flexible support body is connected with a mechanism with a through-hole disc for scraping. The flexible support body is parallel and flush in the flexible drainage tube body, the outlet end of the flexible support body is tightly inserted into the flexible drainage tube body, and the rear end of the flexible support body is connected with a liquid outlet interface. By moving or pulling out the flexible support body, the scraping mechanism can drag and remove the blockage such as blood clots in the gap between the flexible drainage tube body and the flexible support body. The flexible support body can also play a supporting role to prevent the flexible drainage tube body from being blocked due to bending during the conveying process.

Description

Technical Field

[0001] This invention relates to the fields of open spinal cord surgery, spinal endoscopy, and neurosurgery, and particularly to a safe and non-blocking drainage tube for neurosurgery. Background Technology

[0002] Because the spinal cord nerves are exposed after laminectomy in open spinal surgery, the surgical drainage tube often comes into direct contact with the spinal cord. The spinal endoscopic drainage tube reaches the lesion directly through the working sheath, and the lesion site is the spinal cord nerve tissue. The rigidity of ordinary drainage tubes is not specially considered, and the drainage tube is placed perpendicular to the spinal cord nerves. Thus, when the drainage tube moves longitudinally and is compressed due to changes in the patient's body position, there is a risk of causing nerve stimulation or even damage to the patient.

[0003] To ensure the safety of spinal cord surgery and avoid nerve damage caused by drainage tubes, a feasible design is to use soft materials to design the drainage tube. However, in clinical use, due to the low rigidity of the drainage tube, it is easy to bend because it is too soft, which can lead to blockage of the drainage tube and affect its use. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and to propose a safe and unclog-resistant drainage tube for neurosurgery, comprising:

[0005] A flexible drainage tube body and a flexible support body placed inside the flexible drainage tube body, wherein the flexible support body can support the flexible drainage tube body;

[0006] The flexible drainage tube includes an insertion section and a drainage section. The circumferential sidewall of the insertion section is provided with several through holes. The drainage section is connected to the liquid outlet interface, and drainage is carried out through the front end of the insertion section and the through holes.

[0007] The flexible support body has an outwardly protruding scraping mechanism at its front end. By moving the flexible support body, the scraping mechanism can drag and remove the blockage in the gap between the flexible drainage tube and the flexible support body.

[0008] As a further description of the above technical solution: the outer diameter of the scraping mechanism and the inner diameter of the flexible drainage tube are fitted with a small clearance.

[0009] As a further description of the above technical solution: the hardness range of the flexible drainage tube is 25A-40A.

[0010] As a further description of the above technical solution: the hardness of the flexible support body is less than the hardness of the flexible drainage tube body, and the hardness range of the flexible support body is 25A-30A.

[0011] As a further description of the above technical solution: the inner diameter of the flexible drainage tube is 4mm-6mm, and the size of the flexible support is 3mm-4mm.

[0012] As a further description of the above technical solution: the flexible drainage tube and the flexible support are made of silicone.

[0013] As a further description of the above technical solution: the flexible support body also includes a support structure connected to the scraping mechanism, the support structure being a continuous or discontinuous design, and having a cross or three-bladed impeller shape.

[0014] As a further description of the above technical solution: the support structure is provided with at least one reinforcing rib, the distribution range of the support structure is the same as the length of the flexible support body, and the support structure is integrally connected with the flexible support body.

[0015] As a further description of the above technical solution: the front end of the flexible drainage tube is cylindrical or funnel-shaped.

[0016] As a further description of the above technical solution: a stretching section is provided at the rear of the flexible support body to stretch the flexible support body out from the inside of the flexible drainage tube body.

[0017] The above technical solution has the following advantages or beneficial effects:

[0018] 1. The structure is simple. By pulling the flexible support, the scraping mechanism at the front end can move between the flexible drainage tube and the flexible support, pulling out pus or blood clots that may be blocked in the tube. The flexible support can also provide support to prevent the flexible drainage tube from bending and causing blockage during delivery.

[0019] 2. The hardness of the flexible support body is less than that of the flexible drainage tube body, and the flexible support body is supported by a support structure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the drainage tube proposed in this invention;

[0021] Figure 2 This is a cross-sectional view of the flexible drainage tube body in this invention;

[0022] Figure 3 This is a cross-sectional view of the flexible support body in this invention;

[0023] Figure 4 This is a perspective view of the flexible support body in this invention;

[0024] Figure 5 This is a side view of an embodiment of the support structure in this invention. Figure 1 ;

[0025] Figure 6 This is a side view of an embodiment of the support structure in this invention. Figure 2 ;

[0026] Figure 7 This is a cross-sectional view of an embodiment of the flexible support in this invention;

[0027] Figure 8 This is a perspective view of another embodiment of the drainage tube in this invention;

[0028] Figure 9 This is a schematic diagram of another embodiment of the flexible support in this invention;

[0029] Figure 10 This is a cross-sectional view of another embodiment of the flexible drainage tube in this invention.

[0030] Legend:

[0031] 1. Flexible drainage tube body; 11. Insertion section; 12. Drainage section; 13. Through hole; 2. Flexible support body; 21. Scraping mechanism; 22. Support structure; 23. Tensioning section; 3. Liquid outlet. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Reference Figures 1-9 One embodiment of the present invention provides a safe and unclog-resistant drainage tube for neurosurgery, comprising:

[0034] The flexible drainage tube 1 and the flexible support 2 placed inside the flexible drainage tube 1, the flexible support 2 can support the flexible drainage tube 1; the hardness of the flexible drainage tube 1 does not exceed 40A.

[0035] The flexible drainage tube 1 includes an insertion section 11 and a drainage section 12. The circumferential sidewall of the insertion section 11 is provided with several through holes 13. The drainage section 12 is connected to the liquid outlet 3 and drainage is carried out through the front end of the insertion section 11 and the through holes 13.

[0036] The front end of the flexible support 2 is provided with an outwardly protruding scraping mechanism 21. By moving the flexible support 2, the scraping mechanism 21 can drag and remove the blockage in the gap between the flexible drainage tube 1 and the flexible support 2.

[0037] In this embodiment, the flexible drainage tube 1 and the flexible support 2 cooperate with each other, and there is a gap between the flexible drainage tube 1 and the flexible support 2. Drainage is carried out through the gap and the flexible support 2. When there is a blockage in the tube, the flexible support 2 can be pulled out. The scraping mechanism 21 at the front end of the flexible support 2 can pull out the blockage and keep the interior of the flexible drainage tube 1 unobstructed. An insertion section 11 is provided at the front end of the flexible drainage tube 1. The insertion section 11 is delivered to the lesion area for drainage through a spinal endoscope or a delivery sheath. Several through holes 13 are opened on the side wall of the insertion section 11, preferably 6, which are evenly opened in a ring on the side wall of the insertion section 11 to prevent the tube from deforming due to the pressure difference between the inside and outside of the tube when blood clots or other substances block the drainage tube. Through holes can be opened on the plane of the scraping mechanism 21 for drainage.

[0038] The outer diameter of the scraping mechanism 21 is fitted with the inner diameter of the flexible drainage tube 1 with a small clearance; a stretching section 23 is provided at the rear of the flexible support 2 to stretch the flexible support 2 out from the inside of the flexible drainage tube 1.

[0039] In this embodiment, the scraping mechanism 21 is less than 1 mm thick and is located at the front end of the flexible support 2. There is a certain gap between it and the flexible drainage tube 1. By pulling the stretching section 23 at the rear of the flexible support 2, the flexible support 2 can be pulled out from the inner diameter of the flexible drainage tube 1. The scraping mechanism 21 can pull out the blood clots or pus blocking the flexible support 2 and the flexible drainage tube 1, keeping the inner diameter of the flexible drainage tube 1 unobstructed.

[0040] The hardness range of the flexible drainage tube body 1 is 25A-40A; the hardness of the flexible support body 2 is less than that of the flexible drainage tube body 1, and the hardness range of the flexible support body 2 is 25A-30A.

[0041] In this embodiment, the hardness of the flexible drainage tube 1 is preferably 30A, and the hardness of the flexible support 2 is preferably 28A. Through the cooperation of the flexible drainage tube 1 and the flexible support 2, the extension section 11 of the flexible drainage tube 1 is delivered to the target lesion.

[0042] The inner diameter of the flexible drainage tube 1 is 4mm-6mm; the size of the flexible support 2 is 3mm-4mm.

[0043] In this embodiment, the flexible drainage tube 1 needs to be transported through a delivery sheath. The wall thickness of the flexible drainage tube 1 and the flexible support 2 is 0.5 mm. The inner diameter of the flexible drainage tube 1 is preferably 5 mm, and the outer diameter of the flexible support 2 is preferably 3.5 mm.

[0044] The flexible drainage tube 1 and the flexible support 2 are made of silicone. They have good bending properties and are less likely to cause nerve damage during insertion or drainage.

[0045] The flexible support 2 also includes a support structure 22 connected to the scraping mechanism 21. The support structure 22 is designed to be continuous or discontinuous and is shaped like a cross or a three-bladed impeller.

[0046] The support structure 22 is provided with at least one reinforcing rib. The distribution range of the support structure 22 is the same as the length of the flexible support body 2. The support structure 22 and the flexible support body 2 are integrally connected.

[0047] In this embodiment, the support structure 22 can be a cross-shaped reinforcing rib, which can support the interior of the flexible support body 2. The support structure 22 can be designed continuously or intermittently, extending inside the flexible support body 2 to support the flexible support body 2.

[0048] In another embodiment, the support structure 22 can be a three-bladed impeller.

[0049] Specifically, the front end of the flexible drainage tube 1 is cylindrical or funnel-shaped, which facilitates the insertion of the flexible drainage tube 1 into the area to be drained.

[0050] The flexible support 2 is provided with a stretching section 23 at the rear, which stretches the flexible support 2 out from the inside of the flexible drainage tube 1.

[0051] In this embodiment, drainage is achieved through a flexible drainage tube 1 and a flexible support 2. When bending occurs, the support structure 22 within the flexible support 2 provides support to its inner diameter. During drainage, if blockage occurs due to pus or blood clots, the flexible support 2 is pulled out of the lumen of the flexible drainage tube 1 via the stretching section 23. The scraping mechanism 21 at the front end pulls out the blood clots from the gap between the flexible drainage tube 1 and the flexible support 2, allowing the flexible drainage tube 1 to continue drainage. The stretching section 23 can be configured to be inserted directly into the drainage tube 1 and connected to the drainage bag at the rear.

[0052] Example 2

[0053] In this embodiment, the support structure 22 is spiral-shaped, with one side connected to the scraping mechanism 21 and the other side extending to the liquid outlet 3. When the flexible support 2 is inserted into the interior of the flexible drainage tube 1, it can achieve a good supporting effect when the liquid outlet 3 is drained.

[0054] Example 3

[0055] Reference Figures 8-9In this embodiment, the flexible drainage tube 1 is a flat flow path. A protruding limiting support block is provided on the inner wall of the flexible drainage tube 1. The scraping mechanism 21 is fitted with the flexible drainage tube 1 with a small clearance and can move along the setting direction of the protruding support block. The support structure 22 in the flexible support body 2 is a reinforcing rib parallel to the limiting support block, and there are at least two of them. In order to prevent bending and blockage, the circular drainage tube needs to be evenly provided with support structures on its inner wall, which reduces its internal delivery space. In this embodiment, a rectangular drainage tube is designed. Under the influence of blood pressure, the bendable part is the designed long plane. The support structure 22 is perpendicular to the long plane, which provides good support while setting a small number of support structures.

[0056] Example 4

[0057] In this embodiment, the flexible support 2 may have a connecting pipe in the middle and a syringe can be connected to the rear. The scraping mechanism 21 has a U-shaped through hole on its side, which is connected to the middle pipe. Liquid is injected through the syringe at the rear and flows back from the through hole. It is discharged outward together with the blood drained by the flexible drainage tube 1 on the outside. The injection can flush out blood clots and other blockages inside the flexible drainage tube 1 with water flow to keep the drainage tube unobstructed.

[0058] Example 5

[0059] Reference Figure 10 In this embodiment, the interior of the flexible drainage tube 1 is provided with radially extending protrusions, the cross-section is gear-shaped, and the hardness is 40A. The flexible support body 2 is not required. In non-neurological surgeries, the drainage tube designed in this embodiment can be used.

[0060] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A neurosurgical safety anti-block drainage tube, characterized by, The utility model provides a flexible drainage tube body (1) and the flexible support body (2) of placing inside the flexible drainage tube body (1), the flexible support body (2) can support the flexible drainage tube body (1); The flexible drainage tube body (1) includes a stretch-in section (11) and a drainage section (12), the circumference side wall of the stretch-in section (11) is provided with a plurality of through holes (13), the drainage section (12) is connected with a liquid outlet interface (3), and the stretch-in section (11) front end and the through hole (13) are used for drainage; The front end of the flexible support body (2) is provided with an outwardly protruding scraping mechanism (21), the flexible support body (2) is moved, the scraping mechanism (21) is dragged and removed to the blockage between the flexible drainage tube body (1) and the flexible support body (2); The outer diameter of the scraping mechanism (21) and the inner diameter of the flexible drainage tube body (1) are small-gap matched; The flexible support body (2) further includes a support structure (22) connected with the scraping mechanism (21), the support structure (22) is continuously or intermittently designed, and is in the shape of a cross or a three-blade impeller; The support structure (22) is provided with at least one reinforcing rib, the distribution interval of the support structure (22) is the same as the length of the flexible support body (2), and the support structure (22) is integrally connected with the flexible support body (2); The front end of the flexible drainage tube body (1) is in the shape of a cylinder or a funnel; The rear of the flexible support body (2) is provided with a stretch section (23), and the flexible support body (2) is stretched out from the inside of the flexible drainage tube body (1). The hardness of the flexible drainage tube body (1) ranges from 25A to 40A.

2. The neurosurgical safety anti-block drainage tube according to claim 1, wherein, The hardness of the flexible support body (2) is less than that of the flexible drainage tube body (1), and the hardness of the flexible support body (2) ranges from 25A to 30A.

3. The neurosurgical safety anti-block drainage tube according to claim 1, wherein, The inner diameter of the flexible drainage tube body (1) is 4mm-6mm, and the size of the flexible support body (2) is 3mm-4mm.

4. The neurosurgical safety anti-block drainage tube according to claim 1, wherein, The material of the flexible drainage tube body (1) and the flexible support body (2) is silica gel.

5. The neurosurgical safety anti-block drainage tube according to claim 1, wherein, ​

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