Temporary intubation fixing device for neck of hemodialysis patient

Abstract

The invention relates to the technical field of medical instruments, and discloses a hemodialysis patient neck temporary intubation fixing device which comprises a left neck sleeve, a right neck sleeve, a first connecting plate, a universal type connecting mechanism and a negative pressure type fastening mechanism, wherein the left neck sleeve and the right neck sleeve can be arranged on the neck of a patient in a sleeving mode, and the first connecting plate is arranged on the outer circumferential face of the right neck sleeve. The hollow sleeve is mounted at the center of the inner ball ring, and the interior of the hollow sleeve is in a hollow state; the vent holes are formed in the hollow sleeve and can adsorb a pipe body to the circumferential inner wall of the hollow sleeve; and the gas valve can control gas emission and gas introduction. According to the temporary neck intubation fixing device for the hemodialysis patient, the outer wall of the hose can be fixed in an adsorption mode through gas negative pressure, the stable fixing effect is achieved due to the fact that the outer wall of the hose is tightly adsorbed to the inner wall of the hollow sleeve, and in addition, due to the fact that the suction force of gas to the hose is outward, the fixing effect is good. Therefore, the normal liquid flow of the hose is ensured.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a device for fixing a temporary cervical cannula in hemodialysis patients. Background Technology

[0002] Central venous catheterization is a medical procedure that involves inserting a catheter into a central vein to provide a stable vascular access for hemodialysis patients, facilitating the hemodialysis process. Central venous catheterization has the advantages of being relatively simple to perform, safe, and having few complications. It is also immediately usable, making it the preferred vascular access method for various critically ill patients or those requiring temporary dialysis.

[0003] For example, Chinese patent publication number "CN213284798U" discloses a "temporary neck catheter fixation device for hemodialysis patients." Its main structure includes a neck brace. Multiple rubber strips are fixedly connected to the inner wall of the neck brace. Two symmetrical fixing mechanisms are connected to the side wall of the neck brace. Each fixing mechanism includes two support frames fixedly connected to the side wall of the neck brace. A screw is threaded to the upper end of each support frame. The upper ends of the two screws are fixedly connected to the lower end faces of two limiting blocks. Limit blocks are connected to the upper ends of both fixing mechanisms. A connecting rod is fixedly connected to the side wall of the neck brace. A sleeve is fixedly connected to one end of the connecting rod. An arc-shaped locking block is inserted into the sleeve. A limiting mechanism is fixedly connected to the inner wall of the sleeve. This temporary neck catheter fixation device for hemodialysis patients can protect and fix the dialysis tubing, thereby preventing the dialysis tubing from being compressed and becoming blocked, further protecting the patient and indirectly promoting the patient's recovery.

[0004] It is evident that the aforementioned temporary neck catheter fixation device for hemodialysis patients uses a sleeve to secure the tubing. Inside the sleeve, the tubing is elastically compressed by a helical spring, thus securing it. However, this elastic pressure fixation method has the following drawbacks: First, the elastic compression force of the helical spring is relatively weak, resulting in a weak clamping and fixing strength for the tubing, thus leading to poor stability. Second, the elastic contact clamping method easily causes tubing deformation, which affects the blood flow within the tubing, thus still easily causing tubing blockage. Furthermore, because the angle of the sleeve is fixed, the patient needs to change their posture to adjust the flow path of the dialysis tubing, which is not conducive to comfortable dialysis. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a temporary neck catheter fixation device for hemodialysis patients. It utilizes negative gas pressure to achieve an adsorption-type fixation effect on the outer wall of the catheter. Because the outer wall of the catheter is tightly adsorbed onto the inner wall of the hollow sleeve, a stable fixation effect is achieved. Furthermore, the outward suction force of the gas on the catheter ensures normal fluid flow, thus solving the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a temporary neck catheter fixation device for hemodialysis patients, comprising a left neck sleeve and a right neck sleeve that can be fitted onto the patient's neck, and a first connecting plate disposed on the outer circumferential surface of the right neck sleeve; further comprising a universal connecting mechanism, the structure of which includes an outer ball ring fixedly installed on one side of the first connecting plate, an inner ball ring installed at the center of the outer ball ring in a ball-joint manner, and a friction braking ring capable of limiting the relative rotation of the outer ball ring and the inner ball ring; and a negative pressure fastening mechanism, the structure of which includes a hollow sleeve installed at the center of the inner ball ring and having a hollow interior, multiple vent holes disposed inside the hollow sleeve and capable of adsorbing the tube body on its inner circumferential wall, and a gas valve capable of controlling gas discharge and gas supply.

[0007] Preferably, the universal connection mechanism further includes a horizontal connecting plate integrally disposed on the outer circumferential surface of the outer ball ring. One end of the horizontal connecting plate is provided with a second connecting plate integrally disposed therewith and fixedly installed at the end of the first connecting plate. The outer ball ring has a spherical cavity with both ends open inside. The outer ball ring has an annular embedding groove on the periphery of the central region of the spherical cavity. A friction braking ring is embedded in the annular embedding groove of the outer ball ring. The outer circumferential surface of the inner ball ring is installed in the spherical cavity. The center of the inner ball ring has a component mounting cavity with both ends open.

[0008] Preferably, the friction brake ring is a ring-shaped body made of rubber with elastic deformation function.

[0009] Preferably, the maximum static friction force formed by the inner circumferential wall of the friction braking ring on the outer circumferential surface of the inner spherical ring is sufficient to keep the inner spherical ring stable during dialysis.

[0010] Preferably, the structural radius of the spherical cavity is adapted to the structural radius of the inner spherical ring, and the opening radii at the top and bottom of the spherical cavity are smaller than the structural diameter of the inner spherical ring and larger than the structural radius of the inner spherical ring.

[0011] Preferably, the negative pressure fastening mechanism further includes a tube insertion hole located at the center of the hollow sleeve and open at both ends. The middle part of the hollow sleeve is fixedly installed inside the component mounting cavity. A cylindrical annular negative pressure cavity is provided around the central area of ​​the tube insertion hole on the hollow sleeve. A sealing ring is embedded at each end of the hollow sleeve at the tube insertion hole. An outwardly expanding gas reserve cavity is provided at the top of the cylindrical annular negative pressure cavity on the hollow sleeve. A gas flow channel connecting the top of the gas reserve cavity and the external space is provided at the top of the hollow sleeve. An air valve is installed inside the gas flow channel on the hollow sleeve. Multiple vent holes are provided inside the hollow sleeve connecting the circumferential side of the tube insertion hole and the circumferential inner wall of the cylindrical annular negative pressure cavity.

[0012] Preferably, the horizontal symmetry plane of the hollow sleeve and the horizontal symmetry plane of the component mounting cavity are on the same horizontal plane.

[0013] Preferably, the outer diameter of the flexible tube inserted into the insertion hole of the tube body is adapted to the structural radius of the insertion hole of the tube body.

[0014] Preferably, the structural radius of the tube insertion hole is not less than the structural radius of the sealing ring hole.

[0015] Compared with the prior art, the present invention provides a temporary neck catheter fixation device for hemodialysis patients, which has the following beneficial effects: The negative pressure of the gas can be used to fix the outer wall of the hose by adsorption. Since the outer wall of the hose is tightly adsorbed to the inner wall of the hollow sleeve, a stable fixing effect is achieved. In addition, the suction force of the gas on the hose is outward, thus ensuring the normal flow of liquid in the hose. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the present invention; Figure 3 This is a perspective view of the universal joint mechanism in this invention; Figure 4 This is a three-dimensional cross-sectional view of the universal joint mechanism in this invention; Figure 5 This is a perspective view of the negative pressure fastening mechanism in this invention; Figure 6 This is a three-dimensional cross-sectional view of the negative pressure fastening mechanism in this invention.

[0017] The components are as follows: 1. Left neck sleeve; 2. Right neck sleeve; 3. No. 1 connecting plate; 4. Universal connecting mechanism; 41. Outer ball ring; 42. Horizontal connecting plate; 43. No. 2 connecting plate; 44. Spherical cavity; 45. Annular embedded groove; 46. Friction brake ring; 47. Inner ball ring; 48. Component mounting cavity; 5. Negative pressure fastening mechanism; 51. Hollow sleeve; 52. Tube insertion hole; 53. Sealing ring; 54. Annular negative pressure cavity; 55. Gas reserved cavity; 56. Gas flow channel; 57. Gas valve; 58. Vent hole. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1 and Figure 2 A temporary neck catheter fixation device for hemodialysis patients includes a left neck sleeve 1 and a right neck sleeve 2 that can be fitted onto the patient's neck, and a No. 1 connecting plate 3 disposed on the outer circumference of the right neck sleeve 2. The left neck sleeve 1 and the right neck sleeve 2 are installed on the outside of the patient's neck by bolts. A dialysis tubing is inserted through the tube body insertion hole 52, and then a suction device is used for standby.

[0020] To enable the hose clamping angle adjustment function, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 and Figure 4 A universal connection mechanism 4 needs to be set up. Its structure includes an outer ball ring 41 fixedly installed on one side of the first connection plate 3, an inner ball ring 47 installed in the center of the outer ball ring 41 in a ball joint manner, and a friction brake ring 46 that can limit the relative rotation of the outer ball ring 41 and the inner ball ring 47. After the dialysis tubing is installed, the hollow sleeve 51 is manually rotated to continuously adjust the angle of the hollow sleeve 51 until the dialysis tubing forms an angle and path that is conducive to blood flow. Due to the static friction force of the friction brake ring 46 on the hollow sleeve 51, the hollow sleeve 51 will remain in a static state, thereby realizing the angle adjustment function of the dialysis tubing.

[0021] For details regarding the structure of the universal connection mechanism 4, please refer to [link / reference]. Figure 3 and Figure 4It also includes a horizontal connecting plate 42 integrally disposed on the outer circumferential surface of the outer spherical ring 41. One end of the horizontal connecting plate 42 is provided with a second connecting plate 43 integrally disposed with it and fixedly installed at the end of the first connecting plate 3. The outer spherical ring 41 has a spherical cavity 44 with both ends open. The outer spherical ring 41 has an annular embedding groove 45 on the periphery of the central region of the spherical cavity 44. A friction brake ring 46 is embedded in the annular embedding groove 45 of the outer spherical ring 41. The outer circumferential surface of the inner spherical ring 47 is mounted on the spherical cavity. In 44, the inner spherical ring 47 has a component mounting cavity 48 with both ends open at its center. The friction braking ring 46 is a ring-shaped body made of rubber with elastic deformation function. The maximum static friction force formed by the inner circumference of the friction braking ring 46 on the outer circumference of the inner spherical ring 47 is sufficient to keep the inner spherical ring 47 stable during dialysis. The structural radius of the spherical cavity 44 is adapted to the structural radius of the inner spherical ring 47, and the opening radii of the top and bottom of the spherical cavity 44 are smaller than the structural diameter of the inner spherical ring 47 and larger than the structural radius of the inner spherical ring 47.

[0022] To achieve the suction-type fixation function for the dialysis tubing, please refer to... Figure 1 , Figure 2 , Figure 5 and Figure 6 A negative pressure fastening mechanism 5 needs to be installed. Its structure includes a hollow sleeve 51 installed at the center of the inner ball ring 47, multiple vent holes 58 located inside the hollow sleeve 51 that can hold the tube body against its inner circumference, and a gas valve 57 that controls gas discharge and inlet. When the dialysis tubing is inserted into the tube insertion hole 52 and adjusted to the appropriate position, the air inlet of the suction device is inserted into the gas flow channel 56, and then the suction device is turned on. At this time, the dialysis tubing body is attached to the inner circumference of the hollow sleeve 51, while the gas inside the annular negative pressure chamber 54 is extracted. Under the action of air pressure suction, the dialysis tubing body is tightly adsorbed onto the inner circumference of the hollow sleeve 51, realizing the adsorption-type fixation function of the dialysis tubing. Since the vent 58 exerts an outward penetrating adsorption force on the dialysis tubing, the dialysis tubing can be in an expansion trend under the premise of being adsorbed and fixed, which is conducive to blood flow.

[0023] For details regarding the specific structure of the negative pressure fastening mechanism 5, please refer to [link / reference needed]. Figure 5 and Figure 6It also includes a tube insertion hole 52 located at the center of the hollow sleeve 51 and open at both ends. The middle part of the hollow sleeve 51 is fixedly installed inside the component mounting cavity 48. The hollow sleeve 51 has an annular cylindrical negative pressure cavity 54 located around the middle area of ​​the tube insertion hole 52. A sealing ring 53 is embedded at each end of the hollow sleeve 51 located at the tube insertion hole 52. The hollow sleeve 51 has an outwardly expanding gas reserve cavity 55 located at the top of the annular cylindrical negative pressure cavity 54. The top of the hollow sleeve 51 has a connection between the top of the gas reserve cavity 55 and the outside air. The hollow sleeve 51 has a gas flow channel 56, and a gas valve 57 is installed inside the gas flow channel 56. The hollow sleeve 51 has multiple vent holes 58 on the circumferential side of the connecting tube insertion hole 52 and the inner circumferential wall of the annular negative pressure chamber 54. The horizontal symmetry plane of the hollow sleeve 51 is on the same horizontal plane as the horizontal symmetry plane of the component mounting cavity 48. The outer diameter of the hose inserted into the tube insertion hole 52 is adapted to the structural radius of the tube insertion hole 52. The structural radius of the tube insertion hole 52 is not less than the structural radius of the annular hole of the sealing ring 53.

[0024] In use, the left neck collar 1 and right neck collar 2 are bolted to the outside of the patient's neck. The dialysis tubing is inserted through the tube insertion hole 52. A suction device is then used as a backup. The air inlet of the suction device is inserted into the gas flow channel 56, and then the suction device is turned on. At this time, the dialysis tubing is pressed against the inner circumference of the hollow sleeve 51, and the gas inside the annular negative pressure chamber 54 is extracted. Under the action of air pressure suction, the dialysis tubing is tightly adsorbed onto the inner circumference of the hollow sleeve 51, achieving suction of the dialysis tubing. The attached fixation function, due to the outward adsorption force of the vent 58 on the dialysis tubing, allows the dialysis tubing to expand while being fixed in place, thus facilitating blood flow. After the dialysis tubing is installed, the hollow sleeve 51 is manually rotated to continuously adjust its angle until the dialysis tubing forms an angle and path conducive to blood flow. Due to the static friction force of the friction brake ring 46 on the hollow sleeve 51, the hollow sleeve 51 will remain stationary, allowing dialysis to begin.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temporary neck cannula fixation device for hemodialysis patients, comprising a left neck sleeve (1) and a right neck sleeve (2) that can be fitted onto the patient's neck, and a first connecting plate (3) disposed on the outer circumferential surface of the right neck sleeve (2), characterized in that: It also includes, The universal connection mechanism (4) includes an outer ball ring (41) fixedly installed on one side of the first connection plate (3), an inner ball ring (47) installed in a ball joint manner at the center of the outer ball ring (41), and a friction brake ring (46) that can limit the relative rotation of the outer ball ring (41) and the inner ball ring (47) to the required strength. And a negative pressure fastening mechanism (5), the structure of which includes a hollow sleeve (51) installed at the center of the inner ball ring (47) and hollow inside, multiple vent holes (58) set inside the hollow sleeve (51) and capable of adsorbing the tube body on its circumferential inner wall, and a gas valve (57) capable of controlling gas discharge and gas supply.

2. The temporary neck catheter fixation device for hemodialysis patients according to claim 1, characterized in that: The universal connection mechanism (4) further includes a horizontal connecting plate (42) integrally disposed on the outer circumferential surface of the outer ball ring (41). One end of the horizontal connecting plate (42) is provided with a second connecting plate (43) integrally disposed with it and fixedly installed at the end of the first connecting plate (3). The outer ball ring (41) is provided with a spherical cavity (44) with both ends open. The outer ball ring (41) is provided with an annular embedding groove (45) on the periphery of the central area of ​​the spherical cavity (44). The outer ball ring (41) is embedded with a friction brake ring (46) inside the annular embedding groove (45). The outer circumferential surface of the inner ball ring (47) is installed in the spherical cavity (44). The center of the inner ball ring (47) is provided with a component mounting cavity (48) with both ends open.

3. The temporary neck catheter fixation device for hemodialysis patients according to claim 2, characterized in that: The friction brake ring (46) is a ring-shaped body made of rubber with elastic deformation function.

4. The temporary neck catheter fixation device for hemodialysis patients according to claim 3, characterized in that: The maximum static friction force formed by the inner circumferential wall of the friction brake ring (46) on the outer circumferential surface of the inner spherical ring (47) is sufficient to keep the inner spherical ring (47) stable during dialysis.

5. A temporary neck catheter fixation device for hemodialysis patients according to claim 4, characterized in that: The structural radius of the spherical cavity (44) is adapted to the structural radius of the inner spherical ring (47), and the opening radii of the top and bottom of the spherical cavity (44) are smaller than the structural diameter of the inner spherical ring (47) and larger than the structural radius of the inner spherical ring (47).

6. A temporary neck catheter fixation device for hemodialysis patients according to claim 5, characterized in that: The negative pressure fastening mechanism (5) further includes a tube insertion hole (52) located at the center of the hollow sleeve (51) and open at both ends. The middle part of the hollow sleeve (51) is fixedly installed inside the component mounting cavity (48). The hollow sleeve (51) has an annular negative pressure cavity (54) located around the middle area of ​​the tube insertion hole (52). A sealing ring (53) is embedded at each end of the hollow sleeve (51) located at the tube insertion hole (52). An outwardly expanding gas reserve cavity (55) is provided at the top of the annular negative pressure cavity (54). A gas flow channel (56) connecting the top of the gas reserve cavity (55) and the external space is provided at the top of the hollow sleeve (51). An air valve (57) is installed inside the hollow sleeve (51) located in the gas flow channel (56). A plurality of vent holes (58) connecting the circumferential side of the tube insertion hole (52) and the circumferential inner wall of the annular negative pressure cavity (54) are provided inside the hollow sleeve (51).

7. A temporary neck catheter fixation device for hemodialysis patients according to claim 6, characterized in that: The horizontal symmetry plane of the hollow sleeve (51) is on the same horizontal plane as the horizontal symmetry plane of the component mounting cavity (48).

8. A temporary neck catheter fixation device for hemodialysis patients according to claim 7, characterized in that: The outer diameter of the flexible tube inserted into the tube insertion hole (52) is adapted to the structural radius of the tube insertion hole (52).

9. A temporary neck catheter fixation device for hemodialysis patients according to claim 8, characterized in that: The structural radius of the tube insertion hole (52) is not less than the structural radius of the sealing ring (53) annular hole.

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