Two-section reducing lumbar cistern drainage catheter

Abstract

The utility model provides a two-section variable-diameter lumbar cistern drainage catheter, and relates to medical instruments. Extending the catheter; a first main channel of the three-way valve structure is communicated with the imbedding tube, a second main channel of the three-way valve structure is communicated with the extension catheter, a third main channel of the three-way valve structure is provided with a coreless plug used for plugging the third main channel, and the third main channel is used for injecting antibiotics or normal saline; the inner diameter of the first main channel is smaller than the inner diameter of the second main channel, and the inner diameter of the imbedding pipe is smaller than the inner diameter of the extension catheter. The situation that the two-section type reducing lumbar cistern drainage catheter is blocked during drainage is fully avoided.

Description

Technical Field

[0001] The utility model relates to medical equipment, in particular to a two-section variable-diameter lumbar cistern drainage catheter. Background Art

[0002] Neurosurgery is a branch of surgery that diagnoses and treats diseases related to the human nervous system. With the accelerated aging of the population and factors such as accidental injuries, brain diseases that are mainly treated through surgery, such as brain tumors, craniocerebral trauma, cerebral hemorrhage, and functional neurological diseases, are also on the rise. External cranial drainage is one of the most commonly used treatment techniques in neurosurgery. It refers to the continuous drainage of cerebrospinal fluid from the ventricles or lumbar spine to the outside of the body. Common neurological problems such as hydrocephalus caused by post-neurosurgery, craniocerebral trauma, cerebrovascular disease, intracranial infection, and brain tumors require external cranial drainage of cerebrospinal fluid. The main purpose is to drain bloody or infected cerebrospinal fluid outside the skull. It is also used to monitor and control intracranial pressure and inject drugs into the central nervous system.

[0003] Lumbar drainage is a method of draining cerebrospinal fluid from the lumbar cistern. It can safely and effectively drain bloody or infected cerebrospinal fluid, or drain cerebrospinal fluid from the lumbar cistern during surgery to quickly reduce intracranial pressure, increase surgical field exposure, and reduce brain traction injuries and postoperative complications.

[0004] Due to the slender nature of the lumbar drainage tube, tube blockage may occur during use. When the blockage is severe and cannot be cleared, the tube needs to be replaced, which increases the patient's pain. Utility Model Content

[0005] The utility model provides a two-stage variable-diameter lumbar drainage catheter, which aims to solve the problem that the existing lumbar drainage catheter is easily blocked during use.

[0006] In order to achieve the above-mentioned object, an embodiment of the present utility model provides a two-stage variable diameter lumbar drainage catheter, comprising:

[0007] Insertion tube;

[0008] Extension catheter;

[0009] A three-way valve structure, wherein a first main channel of the three-way valve structure is connected to the insertion tube, a second main channel of the three-way valve structure is connected to the extension catheter, and a coreless plug is provided on the third main channel of the three-way valve structure for blocking the third main channel, and the third main channel is used for injecting antibiotics or normal saline;

[0010] The inner diameter of the first main channel is smaller than the inner diameter of the second main channel, and the inner diameter of the insertion tube is smaller than the inner diameter of the extension catheter.

[0011] Preferably, the three-way valve structure includes a valve body, a valve core, and an on-off device. The valve body is provided with a cylindrical valve cavity. The top end of the valve body is provided with an opening communicating with the valve cavity. The first main channel, the second main channel, and the third main channel are provided on the valve body along the radial direction of the valve cavity. The first main channel, the second main channel, and the third main channel are T-shaped and intersect in the valve cavity.

[0012] The valve core is cylindrical, the valve core is coaxially arranged with the valve cavity, and the valve core is provided with a T-shaped channel in the radial direction;

[0013] The switch is detachably arranged on the valve core to drive the valve core to rotate, and the valve core realizes the communication between the T-shaped channel and the first main channel, the second main channel and the third main channel through rotation.

[0014] Preferably, the inner diameter of the first main channel gradually increases from the proximal end to the distal end, and the inner diameter of the distal end of the first main channel is the same as the inner diameter of the second main channel.

[0015] Preferably, a sealing ring is further provided around the upper end of the valve core, and the sealing ring is used to seal the valve cavity.

[0016] Preferably, a plurality of grooves are provided on the top of the valve core, and protrusions matching the grooves are provided on the switch. The protrusions can be inserted into the grooves to drive the valve core to rotate.

[0017] Preferably, a channel indicator is also provided on the switch.

[0018] Preferably,

[0019] The insertion tube is further provided with a plug at the proximal end, the plug sealing the proximal end of the insertion tube. The insertion tube is further provided with a plurality of evenly arranged side holes in the length direction, the side holes being located at the proximal end of the insertion tube.

[0020] Preferably, the insertion tube is further provided with a scale mark, which is arranged along the length direction of the insertion tube, and the starting end of the scale mark is located at the proximal end of the insertion tube.

[0021] Preferably, the extension catheter is made of silicone material.

[0022] The above solution of the utility model has the following beneficial effects:

[0023] The two-stage variable-diameter lumbar cistern drainage catheter includes an insertion tube, an extension tube and a three-way valve structure, which are detachably connected. The insertion tube is used to be inserted into the lumbar cistern. The length of the insertion tube is shorter than that of a conventional drainage catheter. On the one hand, it facilitates the introduction of the insertion tube, and on the other hand, it can effectively reduce the problem of tube blockage. The insertion tube and the extension tube are detachably connected through a three-way valve structure, which extends the overall length of the two-stage variable-diameter lumbar cistern drainage catheter.

[0024] Furthermore, the inner diameter of the first main channel is smaller than that of the second main channel, and the inner diameter of the insertion tube is smaller than that of the extension catheter, resulting in that when the cerebrospinal fluid is drawn out through the insertion tube, the expansion of the diameter through the three-way valve structure reduces the risk of blockage of the extension catheter.

[0025] Therefore, the present application fully avoids the blockage of the two-stage variable diameter lumbar drainage catheter during drainage by shortening the length of the insertion tube and using the expansion of the three-way valve structure to connect the extension catheter with a larger inner diameter.

[0026] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the utility model;

[0028] Figure 2 It is a top view of the three-way valve structure;

[0029] Figure 3 It is a horizontal cross-sectional view of the three-way valve structure (with the valve core hidden);

[0030] Figure 4 This is a simplified diagram of the valve core and valve body assembly;

[0031] Figure 5 This is a top view of the switch;

[0032] Figure 6 This is a bottom view of the switch.

[0033] [Description of Reference Numerals]

[0034] 1-Insertion tube, 11-Plug, 12-Side hole, 13-Scale mark,

[0035] 2-Extension catheter,

[0036] 3-Three-way valve structure, 31-First main channel, 32-Second main channel, 33-Third main channel, 34-Coreless plug, 35-Valve body, 351-Open, 36-Valve core, 361-T-type channel, 362-Sealing ring, 363-Groove, 37-Switch, 371-Bump, 372-Channel indicator

[0037] 31a - first connection part, 32a - second connection part, 33a - third connection part. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1-6 As shown, an embodiment of the present invention provides a two-stage variable-diameter lumbar drainage catheter, including an insertion tube 1, an extension catheter 2 and a three-way valve structure 3, wherein the three-way valve structure 3 includes a valve body 35, a valve core 36 and a switch 37, a valve cavity is provided in the valve body 35, and the valve cavity is cylindrical, an opening 351 is provided at the upper end of the valve body 35, and the opening 351 is communicated with the valve cavity, and the valve core 36 is placed in the valve cavity through the opening 351. A first connecting portion 31a, a second connecting portion 32a and a third connecting portion 33a are also provided on the valve body 35. The first connecting portion 31a, the second connecting portion 32a and the third connecting portion 33a are arranged along the radial direction of the valve cavity. A first main channel 31 is opened in the first connecting portion 31a, a second main channel 32 is opened in the second connecting portion 32a, and a third main channel 33 is opened in the third connecting portion 33a. The first main channel 31, the second main channel 32 and the third main channel 33 are arranged in a T-shape, and one end of each of them intersects in the valve cavity.

[0040] The valve core 36 is provided with a T-shaped channel 361 in the radial direction. The valve core 36 is coaxially arranged with the valve cavity. The valve cavity can realize the communication between the T-shaped channel 361 and the first main channel 31, the second main channel 32 and the third main channel 33 by rotating.

[0041] The aforementioned insertion tube 1 is sleeved over the first connecting portion 31a, ensuring communication between the insertion tube 1 and the first main channel 31. The extension catheter 2 is sleeved over the second connecting portion 32a, ensuring communication between the extension catheter 2 and the second main channel 32. A coreless plug 34 is provided on the third connecting portion 33a to block the third main channel 33. The third main channel 33 is used for injecting antibiotics or saline. The inner diameter of the first main channel 31 is smaller than that of the second main channel 32, and the inner diameter of the insertion tube 1 is smaller than that of the extension catheter 2.

[0042] When using the present application, the proximal end of the insertion tube 1 is placed in the lumbar cistern, and then the three-way valve structure 3 and the extension catheter 2 are connected respectively and the first main channel 31 and the second main channel 32 are connected to complete the drainage.

[0043] The conventional insertion tube 1 has a small inner diameter and a long length, and the probability of blockage after insertion is very high. For this reason, the present application reduces the length of the insertion tube 1, which on the one hand facilitates the introduction of the insertion tube 1, and on the other hand can effectively reduce the probability of blockage of the insertion tube 1. The insertion tube 1 and the extension catheter 2 are detachably connected through a three-way valve structure 3, thereby extending the overall length of the two-stage variable-diameter lumbar drainage catheter.

[0044] At the same time, the inner diameter of the second main channel 32 is larger than the inner diameter of the first main channel 31, and the inner diameter of the extension catheter 2 is larger than the inner diameter of the insertion tube 1. Therefore, after the cerebrospinal fluid is discharged from the body, it flows in the extension catheter 2 with a larger inner diameter, which further reduces the chance of blockage of the extension catheter 2.

[0045] In summary, the present application effectively avoids blockage during drainage by shortening the length of the insertion tube 1 and utilizing the diameter expansion of the three-way valve structure 3 to connect to the extension catheter 2 with a larger inner diameter.

[0046] Furthermore, the aforementioned switch 37 is detachably provided at the upper end of the valve core 36 through the opening 351 , and the switch 37 drives the valve core 36 to rotate to realize the communication between the T-shaped channel 361 and each main channel.

[0047] In this embodiment, the switch 37 is provided with a plurality of protrusions 371, and the upper end of the valve core 36 is provided with a plurality of grooves 363. The grooves 363 on the valve core 36 match the protrusions 371 on the switch 37, so that the protrusions 371 can be inserted into the grooves 363 to achieve a detachable connection. When the switch 37 is rotated, the protrusions 371 and the grooves 363 cooperate to drive the valve core 36 to rotate about its axis. After the rotation is completed, the switch 37 can be removed to avoid accidental activation and drainage blockage.

[0048] It is understandable that other structures that can achieve detachable connection and transmission between the switch 37 and the valve core 36 can be used in this application.

[0049] Preferably, the switch 37 is further provided with a channel indicator 372 , which is consistent with the direction of the T-shaped channel 361 of the valve core 36 and is used to indicate the direction of the T-shaped channel 361 and thus determine whether the T-shaped channel 361 is connected to each main channel.

[0050] In some embodiments of the present application, in order to prevent blockage in the valve cavity during the drainage process, the diameter change position is set on the first main channel 31. Specifically, the inner diameter of the first main channel 31 gradually increases from the proximal end to the distal end, and the inner diameter of the distal end of the first main channel 31 is the same as the inner diameter of the second main channel 32.

[0051] Preferably, a sealing ring 362 is also formed at the upper end of the valve core 36. The sealing ring 362 is along the circumferential protrusion 371 of the valve core 36. When the valve core 36 is assembled in the valve cavity, the valve cavity can be closed from the upper end to prevent leakage of cerebrospinal fluid in the valve cavity.

[0052] The aforementioned insertion tube 1 is further provided with a plug 11 at its proximal end, which seals the proximal end of the insertion tube 1. A plurality of side holes 12 are also provided along the length of the insertion tube 1. The side holes 12 are evenly spaced and located at the proximal end of the insertion tube 1. The distal end of the insertion tube 1 communicates with the aforementioned first main channel 31.

[0053] In this embodiment, a plug 11 is provided on the insertion tube 1, and several side holes 12 are provided on the side. This serves to shift the drainage port from the proximal end of the insertion tube 1 to the side of the tube 1, thereby preventing excessive drainage. The plug 11 also provides a force point for the guidewire (an auxiliary tool used to assist in inserting the insertion tube 1 into the lumbar cistern), facilitating the transmission of the driving force during guidewire-assisted insertion, making the insertion of the insertion tube 1 more stable and convenient.

[0054] Furthermore, a scale mark 13 is provided on the insertion tube 1, and the scale mark 13 is arranged along the length direction of the insertion tube 1, and the starting end of the scale mark 13 is located at the proximal end of the insertion tube 1, that is, the initial scale of the scale mark 13 is located at the proximal end of the insertion tube 1, which makes it convenient for the operator to know the insertion length.

[0055] Preferably, the scale marks 13 and the side holes 12 can be located on the same side of the insertion tube 1. Several scale marks 13 near the proximal end of the insertion tube 1 are replaced by side holes 12. On the one hand, concentrating the side holes 12 at the proximal end of the insertion tube improves drainage. On the other hand, several scale marks at the proximal end of the insertion tube 1 extend into the lumbar cistern and cannot serve as markings.

[0056] In this embodiment, the side hole 12 is used to replace the first two scale marks 13 at the proximal end of the insertion tube 1.

[0057] In other embodiments of the present application, the scale and the side hole 12 are located on different sides of the insertion tube 1 .

[0058] Preferably, the extension catheter 2 of the present application is made of silicone material.

[0059] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A two-stage variable diameter lumbar drainage catheter, characterized in that: include: Insertion tube (1); Extension catheter (2); A three-way valve structure (3), wherein a first main channel (31) of the three-way valve structure (3) is in communication with the insertion tube (1), a second main channel (32) of the three-way valve structure (3) is in communication with the extension catheter (2), and a coreless plug (34) for blocking the third main channel (33) is provided on the third main channel (33) of the three-way valve structure (3), and the third main channel (33) is used for injecting antibiotics or physiological saline; The inner diameter of the first main channel (31) is smaller than the inner diameter of the second main channel (32), and the inner diameter of the insertion tube (1) is smaller than the inner diameter of the extension catheter (2).

2. The two-stage variable diameter lumbar drainage catheter according to claim 1, characterized in that: The three-way valve structure (3) comprises a valve body (35), a valve core (36) and a switch (37); the valve body (35) is provided with a columnar valve cavity; the top end of the valve body (35) is provided with an opening (351) communicating with the valve cavity; the first main channel (31), the second main channel (32) and the third main channel (33) are arranged on the valve body (35) along the radial direction of the valve cavity; and the first main channel (31), the second main channel (32) and the third main channel (33) are T-shaped and intersect in the valve cavity; The valve core (36) is cylindrical, the valve core (36) is coaxially arranged with the valve cavity, and the valve core (36) is provided with a T-shaped channel (361) in the radial direction; The switch (37) is detachably arranged on the valve core (36) to drive the valve core (36) to rotate, and the valve core (36) realizes the communication between the T-shaped channel (361) and the first main channel (31), the second main channel (32) and the third main channel (33) through rotation.

3. The two-stage variable diameter lumbar drainage catheter according to claim 2, characterized in that: The inner diameter of the first main channel (31) gradually increases from the proximal end to the distal end, and the inner diameter of the distal end of the first main channel (31) is the same as the inner diameter of the second main channel (32).

4. The two-stage variable diameter lumbar drainage catheter according to claim 3, characterized in that: A sealing ring (362) is also provided in the circumferential direction of the upper end of the valve core (36), and the sealing ring (362) is used to seal the valve cavity.

5. The two-stage variable diameter lumbar drainage catheter according to claim 3, characterized in that: The top of the valve core (36) is provided with a plurality of grooves (363), and the switch (37) is provided with protrusions (371) adapted to the grooves (363). The protrusions (371) can be inserted into the grooves (363) to drive the valve core (36) to rotate.

6. The two-stage variable diameter lumbar drainage catheter according to claim 3, characterized in that: The switch (37) is also provided with a channel indicator (372).

7. The two-stage variable diameter lumbar drainage catheter according to claim 1, characterized in that: The insertion tube (1) is further provided with a plug (11) at the proximal end, and the plug (11) closes the proximal end of the insertion tube (1). The insertion tube (1) is further provided with a plurality of evenly arranged side holes (12) in the longitudinal direction, and the side holes (12) are located at the proximal end of the insertion tube (1).

8. The two-stage variable diameter lumbar drainage catheter according to claim 7, characterized in that: The insertion tube (1) is further provided with a scale mark (13), which is arranged along the length direction of the insertion tube (1), and the starting end of the scale mark (13) is located at the proximal end of the insertion tube (1).

9. The two-stage variable diameter lumbar drainage catheter according to claim 1, characterized in that: The extension catheter (2) is made of silicone material.

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