Anti-bending fixing device of drainage catheter for external ventricular drainage

Abstract

The invention discloses an anti-bending fixing device of a drainage catheter for external ventricular drainage, relates to the field of cerebral drainage auxiliary instruments, and solves the problems that the drainage catheter is easy to bend due to the subscalp hidden trend, the drainage is unsmooth, the intracranial pressure measurement is inaccurate, and the existing fixing mode needs frequent human intervention. The device comprises a contact piece surrounding a drainage catheter, the contact piece is provided with a first adhesion layer and an inner side limiting protrusion, and the outer side is rotationally connected with a locking piece with a first connecting hole; the anti-bending supporting plate with the bending angle of 90-180 degrees is connected with the locking piece through a pin, and the auxiliary supporting plate is assembled to be matched with the trend of the guide pipe. The locking piece is connected with the telescopic connecting frame and the mounting frame, a reverse control shaft in the mounting frame is connected with two sliding frames, and the sliding frames are provided with supporting pieces with flexible bags and second adhesion layers. The device achieves accurate bending prevention and stable supporting, manual operation is reduced, drainage and pressure measurement accuracy is guaranteed, and adaptability is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brain drainage auxiliary devices, in particular to a bending-preventing fixing device for a drainage catheter for external ventricular drainage. BACKGROUND

[0002] External ventricular drainage (EVD) is a core intervention means for neurosurgery to deal with intracranial hypertension, acute hydrocephalus and other critical conditions. By drilling a hole in the skull and inserting a catheter to drain cerebrospinal fluid, intracranial pressure can be reduced by more than 40% within 15 minutes, which can win critical treatment time for patients with craniocerebral injury, cerebral hemorrhage and other conditions. About 500,000 critically ill patients worldwide rely on this technology to save their lives every year. As an invasive technology with both drainage and intracranial pressure monitoring functions, its effectiveness is highly dependent on the stability and patency of the catheter. Clinical continuous pressure measurement, graded drainage and cerebrospinal fluid sampling need to be achieved through a three-way valve system, and abnormal catheter position or blocked flow can induce severe complications such as brain hernia and excessive drainage hematoma. Among them, new complications caused by insufficient or excessive drainage account for up to 23%. Currently, the catheter is mainly fixed by using adhesive tape, double suture fixation or basic fixation clamp, which can initially prevent it from coming out, but due to the hidden path of the catheter under the scalp, the size difference of the patient's head and the influence of head movement, the accuracy and stability of the fixation still have obvious shortcomings.

[0003] The existing fixing methods cannot solve the clinical core problems, which limits the drainage effect and the safety of diagnosis and treatment. On the one hand, the hidden path of the catheter from the subscalp puncture point to the ventricle is prone to sharp bending, and the conventional fixing device cannot limit the bending angle. The reduction of the pipe diameter directly causes a sharp drop in the flow rate of the drainage, and the extrusion of the catheter by the scalp pressure can interfere with the intracranial pressure sensor signal, causing the pressure measurement data to be distorted and increasing the risk of misjudgment of brain hernia warning. On the other hand, the fixed structure lacks adaptability: traditional devices are mostly standardized designs and cannot be flexibly adjusted to adapt to the head size and incision position of different patients, and lack a multi-dimensional support mechanism. When the patient moves his head, the catheter is prone to displacement, and the medical staff need to frequently intervene and adjust. In addition, the existing devices either cannot adapt to the complex path of the subscalp catheter or need to expose the catheter for operation, which not only increases the risk of infection but also brings inconvenience to the observation of the drainage state and postoperative care, seriously affecting the clinical operation efficiency. SUMMARY

[0004] The present application provides a bending-preventing fixing device for a drainage catheter for external ventricular drainage, which specifically comprises:

[0005] A contact element surrounds the outside of the drainage conduit. The outer side of the upper base of the contact element is provided with a connecting thread, and a locking element is screwed into the outer side of the connecting thread. The locking element has a first connecting hole. The outer edge of the contact element has a first adhesive layer. An anti-bending support plate with a bending angle greater than 90 degrees and less than 180 degrees is provided. The anti-bending support plate has a second connecting hole, which is aligned with the first connecting hole and connected by a pin. The anti-bending support plate restricts the bending angle of the drainage conduit to be greater than 90 degrees and less than 180 degrees. A sliding frame is detachably connected to the outside of the locking element, and the connecting frame is connected to a mounting frame. The mounting frame has two coaxial control shafts with opposite thread directions rotatably connected internally, and is connected to two sliding frames through the control shafts. When the control shafts rotate, the two sliding frames move closer to or further away from each other.

[0006] Preferably, the inner side of the upper base of the contact element is provided with circumferentially arranged limiting protrusions.

[0007] Preferably, the anti-bending support plate is composed of multiple auxiliary support plates; the two ends of each auxiliary support plate are provided with connecting holes, and pins are inserted into the connecting holes between the multiple auxiliary support plates, and each pair of auxiliary support plates is connected by pins.

[0008] Preferably, the auxiliary tray is a semi-tubular structure, and the openings of two adjacent auxiliary trays face opposite directions.

[0009] Preferably, the auxiliary support plate can be a semi-corrugated tubular structure, allowing the auxiliary support plate to bend; traction members are inserted into the connection holes of the multiple auxiliary support plates; the traction members are flexible guide wires.

[0010] Preferably, the locking member has circumferentially arranged grooves on its outer side; the end of the connecting bracket near the locking member is elastic; the end of the connecting bracket near the locking member is an open ring structure, and the inner side of the end of the connecting bracket near the locking member is connected to a locking member by an elastic member; the outer side of the locking member is fitted with one end of the connecting bracket, and the locking member is engaged in the groove of the locking member.

[0011] Preferably, the upper end of the sliding frame is provided with a handle, and the lower end of the sliding frame is provided with a support member; the inner side of the support member is provided with a protruding flexible bladder, and the outer periphery of the support member is provided with a second adhesive layer.

[0012] Preferably, both the connecting frame and the sliding frame are telescopic rods.

[0013] Preferably, the lower end of the mounting bracket is provided with a filler, which comes into contact with the patient's face.

[0014] Preferably, the contact is a conical structure, and the cavity between the contact, the patient's head, and the drainage catheter is filled with a protective element.

[0015] Beneficial effects

[0016] 1. This invention precisely addresses the core clinical pain points of external ventricular drainage, effectively improving drainage efficacy and pressure measurement accuracy. Addressing the issues of drainage tubes being easily bent due to their concealed subcutaneous path under the scalp, poor drainage caused by scalp pressure, and inaccurate intracranial pressure measurements, the anti-bend support plate limits the bending angle of the drainage tube to 90°-180°, preventing a decrease in flow rate caused by tube diameter reduction. The contact element is fixed around the wound by a first adhesive layer, and the inner limiting protrusion further locks the tube, counteracting the squeezing of the tube by scalp pressure and ensuring stable intracranial pressure data. Simultaneously, the support structure composed of the connecting frame and sliding frame has an adjustable spacing to adapt to different head sizes. The flexible bladder of the support element and the second adhesive layer, together with the contact element, form a three-point fixation, preventing tube displacement even if the patient's head moves, significantly reducing the need for frequent manual manipulation of the tube in clinical practice.

[0017] 2. This device balances adaptability, safety, and ease of operation, fully meeting clinical needs. The anti-bend support plate is composed of multiple auxiliary support plates connected by pins or bent by traction components, flexibly adapting to the concealed path of subcutaneous catheters and providing precise support without exposing the catheter. The contact element adopts a split conical structure for quick and easy encapsulation and locking of the catheter. The protective filling around the wound isolates contaminants, protects the wound, and can also store medication to aid recovery. In addition, the connecting frame and locking element are quickly assembled and disassembled using elastic locking components. The telescopic rod design adapts to different incision locations, and the staggered openings of the auxiliary support plates facilitate observation of drainage status by medical staff. Inspections can be completed without disassembling the device, significantly improving clinical operational efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram:

[0021] Figure 1 A three-dimensional structural schematic diagram of an anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown.

[0022] Figure 2 An exploded view of an anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown.

[0023] Figure 3A three-dimensional cross-sectional schematic diagram of the contact element of the anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown.

[0024] Figure 4 An anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown. Figure 3 A magnified view of a portion of point A shown.

[0025] Figure 5 An assembly diagram of the anti-bending bracket of the anti-bending fixing device for a drainage catheter according to another embodiment of the present invention is shown.

[0026] Figure 6 An anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown. Figure 5 A schematic diagram of the three-dimensional structure at point B is shown.

[0027] Figure 7 An assembly diagram of the traction component of an anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown.

[0028] Figure 8 An anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown. Figure 7 A magnified view of a portion of point C shown.

[0029] Figure 9 An assembly diagram of the connecting bracket of the anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown.

[0030] Figure 10 An anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown. Figure 9 A magnified view of a portion at point D is shown.

[0031] Figure 11 A three-dimensional structural schematic diagram of the sliding frame of the anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown.

[0032] Figure 12 An assembly diagram of the filler and protective component of the anti-bending fixing device for a drainage catheter according to an embodiment of the present invention is shown.

[0033] List of main reference numerals

[0034] 1. Drainage catheter;

[0035] 201. Contact element; 202. First adhesive layer; 203. Connecting thread; 204. Locking element; 205. First connecting hole; 206. Limiting protrusion;

[0036] 3. Anti-bending support plate; 301. Second connecting hole; 302. Auxiliary support plate; 303. Traction component;

[0037] 401. Connecting bracket; 402. Locking component; 403. Elastic component; 404. Mounting bracket; 405. Control shaft;

[0038] 501. Sliding frame; 502. Handle; 503. Support component; 504. Second adhesive layer; 505. Flexible capsule;

[0039] 6. Filler components;

[0040] 7. Protective components. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0043] To keep the drawings concise, only the parts relevant to this application are shown schematically in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is labeled.

[0044] In this document, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] Example: Please refer to Figures 1 to 12 :

[0046] This invention proposes an anti-bending and fixing device for a drainage catheter used for external ventricular drainage, comprising:

[0047] A contact 201 surrounds the outside of the drainage conduit 1. A connecting thread 203 is provided on the outer side of the upper base of the contact 201, and a locking member 204 is screwed into the outer side of the connecting thread 203. A first connecting hole 205 is provided on the locking member 204. A first adhesive layer 202 is provided on the outer edge of the contact 201. An anti-bending support plate 3 has a bending angle greater than 90 degrees and less than 180 degrees. The anti-bending support plate 3 has a second connecting hole 301, and the second connecting hole 301 of the anti-bending support plate 3 aligns with the first connecting hole 205. The tubes are aligned and connected by pins; the anti-bending support plate 3 restricts the bending angle of the drainage tube 1 to be greater than 90 degrees and less than 180 degrees; the sliding frame 501 and the locking member 204 are detachably connected to the outer side of the connecting frame 401, and the connecting frame 401 is connected to the mounting frame 404; the mounting frame 404 has two coaxial control shafts 405 with opposite thread directions rotatably connected inside, and is connected to the two sliding frames 501 through the control shafts 405; when the control shafts 405 rotate, the two sliding frames 501 move closer to each other or further away.

[0048] like Figure 1 , Figure 2 As shown, in this device, the drainage catheter 1 for external ventricular drainage is restricted by the contact member 201. Since the first adhesive layer 202 on the outside of the contact member 201 is adhered to the skin around the opening in the patient's skull, the drainage catheter 1 will not be bent by external forces when it protrudes from the skull. At the same time, the part of the drainage catheter 1 located on the outside of the skull is also supported by the anti-bending plate 3, so that the bending point of the drainage catheter 1 is kept between 90 degrees and 180 degrees, effectively avoiding the drainage catheter 1 bending at too small an angle, which would cause the diameter of the tube at the bending point to become smaller and the flow rate to be too slow.

[0049] In the above embodiment, the device is also provided with a connecting frame 401 and a sliding frame 501 to fix and support the contact 201, the anti-bending support plate 3, and the drainage tube 1. The sliding frame 501 is controlled by a control shaft 405 on the connecting frame 401. When the control shaft 405 rotates, the sliding frames 501 move closer or further apart to adjust the distance between them. At the same time, the lower end of the sliding frame 501 can be fixed to both sides of the patient's head after adjusting the spacing according to the size of the patient's head, or it can be fixed to the platform by other fixing structures.

[0050] It should be noted that in this embodiment, the sliding frame 501 is fixed on both sides of the patient's head. When the sliding frame 501 is fixed on both sides of the patient's head, the stability of the sliding frame 501 is ensured. Even if the position of the patient's head changes, the sliding frame 501 will also change accordingly, which has minimal impact on the drainage tube 1 fixed on the contact member 201 and the anti-bending support plate 3.

[0051] In the above embodiments, the contact element 201 can adopt a split structure, such as... Figure 3As shown, the circular contact 201 has an opening of radius length, and the connecting thread 203 can be a broken thread structure set on the conical base. At the same time, the locking member 204 also has a conical internal thread that can match the connecting thread 203. Through the above structure, the contact 201 can quickly wrap around the drainage tube 1. As the locking member 204 is screwed in, the connecting thread 203 will be squeezed towards the center and gradually reduce its inner diameter, thereby locking the drainage tube 1.

[0052] It should be noted that in the above embodiments, the contact member 201 can be a circular dressing, which is fixed on a substrate made of elastic plastic, and a connecting thread 203 is opened on the substrate. Then, through the elasticity of the substrate, it cooperates with the locking member 204 to lock the drainage tube 1.

[0053] Among them, the inner side of the upper base of the contact member 201 is provided with circumferentially arranged limiting protrusions 206.

[0054] like Figure 4 As shown, in this embodiment, when the drainage conduit 1 is inserted into the inner side of the base of the contact member 201, the limiting protrusion 206 will contact the drainage conduit 1, increasing the friction between the base of the contact member 201 and the drainage conduit 1, thus maintaining the stability of the drainage conduit 1. In addition, when the limiting protrusion 206 cooperates with the retractable base of the contact member 201 in the above embodiment, it can increase the compression between the limiting protrusion 206 and the drainage conduit 1, further increasing stability.

[0055] The anti-bending support plate 3 is composed of multiple auxiliary support plates 302. The first and last ends of the auxiliary support plate 302 are provided with connecting holes, and pins are inserted into the connecting holes between the multiple auxiliary support plates 302. Each pair of auxiliary support plates 302 are connected by pins.

[0056] like Figure 5 and Figure 6 As shown, in this embodiment, the specifications of the auxiliary support plate 302 are determined by the angle at which the drainage tube 1 needs to be bent. For example, in a set of auxiliary support plates 302, by setting horizontal auxiliary support plates 302, 30-degree bent auxiliary support plates 302, 60-degree bent auxiliary support plates 302 and 90-degree bent auxiliary support plates 302, a large number of anti-bending support plates 3 can be formed by combining auxiliary support plates 302 with different degrees of bending. They can also be further combined to extend the support length of the anti-bending support plates 3 for the drainage tube 1.

[0057] Among them, the auxiliary tray 302 is a semi-tubular structure, and the openings of two adjacent auxiliary trays 302 face opposite directions.

[0058] like Figure 5As shown, in this embodiment, the staggered auxiliary support plates 302 can ensure that the upper and lower sides of the drainage tube 1 are supported. At the same time, every other auxiliary support plate 302 can expose one side of the drainage tube 1, making it convenient for staff to check the condition inside the drainage tube 1.

[0059] Among them, the auxiliary support plate 302 can be a semi-corrugated tubular structure, so that the auxiliary support plate 302 itself can be bent; the connecting holes of multiple auxiliary support plates 302 are all inserted with traction members 303; the traction member 303 is a flexible guide wire.

[0060] like Figure 7 and Figure 8 As shown, in this embodiment, the auxiliary support plate 302 can bend adaptively by bending the traction member 303, which can quickly match the bent drainage tube 1.

[0061] The locking member 204 has a circumferentially arranged groove on its outer side; the connecting bracket 401 is elastic at one end near the locking member 204; the connecting bracket 401 is an open ring structure at one end near the locking member 204, and a locking member 402 is connected to the inner side of the connecting bracket 401 near the locking member 204 via an elastic member 403; one end of the connecting bracket 401 is fitted onto the outer side of the locking member 204, and the locking member 402 is engaged in the groove of the locking member 204.

[0062] like Figure 9 and Figure 10 As shown, in this embodiment, when one end of the connecting bracket 401 is fitted onto the outside of the locking member 204, the locking member 402 cooperates with the groove of the locking member 204 to achieve locking and maintain the stability of the connection. In addition, when not connected to the connecting bracket 401, the groove of the locking member 204 can also serve as a friction texture to increase the friction with the operator's hand, for the connection between the locking member 204 and the connecting thread 203.

[0063] The upper end of the sliding frame 501 is provided with a handle 502, and the lower end of the sliding frame 501 is provided with a support member 503; the inner side of the support member 503 is provided with a protruding flexible bladder 505, and the outer periphery of the support member 503 is provided with a second adhesive layer 504.

[0064] like Figure 11 As shown, in this embodiment, when the sliding frame 501 is adjusted to be the same as the width of the patient's head, it contacts the patient's head through the flexible bladder 505 of the support member 503 to ensure comfortable and tight contact. At the same time, it adheres to the patient's head through the second adhesive layer 504 to ensure stable fixation.

[0065] In addition, the second adhesive layer 504, together with the first adhesive layer 202 of the contact member 201, forms a three-point connection, further ensuring the stability of the support for the drainage catheter 1.

[0066] Both the connecting frame 401 and the sliding frame 501 are telescopic rods.

[0067] like Figure 11 As shown, in this embodiment, the retractable connecting frame 401 and sliding frame 501 can adjust the various dimensions of the device according to the position of the patient's head and incision, so as to match the patient's size.

[0068] The mounting bracket 404 has a filler 6 at its lower end, and the filler 6 comes into contact with the patient's face.

[0069] like Figure 12 As shown, in this embodiment, the filler 6 is used to supplement the space between the mounting frame 404 and the patient's face. It can be made of medical sponge, medical cotton ball, medical gel, or other materials to increase the support for the mounting frame 404 and keep the mounting frame 404 stable.

[0070] The contact 201 has a conical structure, and the cavity between the contact 201, the patient's head, and the drainage catheter 1 is filled with a protective element 7.

[0071] like Figure 12 As shown, in this embodiment, the patient's head wound is protected by the protective component 7. The protective component 7 often uses substances such as medical gel to prevent external contaminants from coming into contact with the skull wound. In addition, the protective component 7 can also store medicine to promote the patient's recovery.

[0072] The above description is merely a specific embodiment of this application. Under the guidance of the above teachings, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of this application, and the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A bend-resistant fixing device for a drainage catheter used for external ventricular drainage, characterized in that, include: A contact element (201) surrounds the outside of the drainage conduit (1). The outer side of the upper base of the contact element (201) is provided with a connecting thread (203), and a locking element (204) is screwed into the outer side of the connecting thread (203). The locking element (204) is provided with a first connecting hole (205). The outer edge of the contact element (201) is provided with a first adhesive layer (202). A bending support plate (3) with a bending angle greater than 90 degrees and less than 180 degrees is provided. The bending support plate (3) is provided with a second connecting hole (301). The second connecting hole (301) of the bending support plate (3) is aligned with the first connecting hole (205) and connected by a pin. The bending support plate (3) restricts the bending angle of the drainage conduit (1) from being greater than 90 degrees and less than 180 degrees. The sliding bracket (501) is detachably connected to the outer side of the locking member (204), and the connecting bracket (401) is connected to the mounting bracket (404); the mounting bracket (404) is rotatably connected to two coaxial control shafts (405) with opposite thread directions, and is connected to the two sliding brackets (501) through the control shafts (405); when the control shafts (405) rotate, the two sliding brackets (501) move closer to or further away from each other.

2. The anti-bending fixing device for a drainage catheter used for external ventricular drainage according to claim 1, characterized in that, The contact element (201) has circumferentially arranged limiting protrusions (206) on the inner side of the upper base.

3. The anti-bending fixing device for a drainage catheter used for external ventricular drainage according to claim 1, characterized in that, The anti-bending support plate (3) is composed of multiple auxiliary support plates (302); the two ends of the auxiliary support plate (302) are provided with connecting holes, and pins are inserted into the connecting holes between the multiple auxiliary support plates (302), and every two auxiliary support plates (302) are connected by pins.

4. The anti-bending fixing device for a drainage catheter used for external ventricular drainage according to claim 3, characterized in that, The auxiliary tray (302) is a semi-tubular structure, and the openings of two adjacent auxiliary trays (302) face opposite directions.

5. The anti-bending fixing device for a drainage catheter used for external ventricular drainage according to claim 3, characterized in that, The auxiliary support plate (302) can be a semi-corrugated tubular structure, allowing the auxiliary support plate (302) itself to bend; traction members (303) are inserted into the connecting holes of the multiple auxiliary support plates (302); the traction member (303) is a flexible guide wire.

6. The anti-bending fixing device for a drainage catheter used for external ventricular drainage according to claim 1, characterized in that, The locking member (204) has a circumferentially arranged groove on its outer side; the connecting frame (401) is elastic at one end near the locking member (204); the connecting frame (401) is an open ring structure at one end near the locking member (204), and a locking member (402) is connected to the inner side of the connecting frame (401) near the locking member (204) by an elastic member (403); one end of the connecting frame (401) is fitted on the outer side of the locking member (204), and the locking member (402) is inserted into the groove of the locking member (204).

7. The anti-bending fixing device for a drainage catheter used for external ventricular drainage according to claim 1, characterized in that, The upper end of the sliding frame (501) is provided with a handle (502), and the lower end of the sliding frame (501) is provided with a support member (503); the inner side of the support member (503) is provided with a protruding flexible bladder (505), and the outer periphery of the support member (503) is provided with a second adhesive layer (504).

8. The anti-bending fixing device for a drainage catheter used for external ventricular drainage according to claim 1, characterized in that, Both the connecting frame (401) and the sliding frame (501) are telescopic rods.

9. The anti-bending fixing device for a drainage catheter used for external ventricular drainage according to claim 1, characterized in that, The lower end of the mounting bracket (404) is provided with a filler (6), and the filler (6) comes into contact with the patient's face.

10. The anti-bending fixing device for a drainage catheter used for external ventricular drainage according to claim 1, characterized in that, The contact (201) has a conical structure, and the cavity between the contact (201), the patient's head and the drainage catheter (1) is filled with a protective element (7).

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