Hemodialysis tube fixing and protecting device for hemodialysis

Abstract

The utility model discloses a hemodialysis pipe fixing and protecting device for hemodialysis belongs to the medical instrument technical field, and it includes main support base, is set up with the accommodation groove for accommodating patient's arm on the main support base, the accommodation groove is provided with the arrow mark in, to indicate the arm of patient's place direction, one side of main support base is fixedly connected with vice support base, and the vice support base is used for limiting and protecting hemodialysis pipe. The utility model adopts the design of the sliding buckle cooperation bidirectional superimposed bandage in the arm fixing link, and the main bandage and vice bandage are respectively set up corresponding sliding buckle, and the reverse superimposition is carried out with the sliding buckle as fulcrum, and then is locked through magic tape, forms bidirectional constraint, effectively avoids the bandage slippage or deflection caused by one -sided stress, and the fixing is more firm and stable. Meanwhile, the main bandage middle section splicing elastic band can carry out elastic self -adaptation compensation according to the circumference change of patient's forearm muscle and slight activity.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically a hemodialysis catheter fixing and protection device. Background Technology

[0002] Hemodialysis catheter fixation and protection devices are a general term for medical devices used in hemodialysis treatment to fix, protect, and store hemodialysis catheters (and external tubing) placed in the patient's body. Their core function is to prevent catheter displacement, dislodgement, kinking, and infection, thereby ensuring the safety and smooth progress of dialysis treatment.

[0003] According to the search, patent document with publication number CN221751951U discloses a hemodialysis catheter fixing and protection device, including a fixing base, an arm fixing mechanism, and a tube fixing mechanism. The fixing base is provided with a U-shaped groove for placing the arm. The arm fixing mechanism is disposed on the fixing base for fixing the arm in the U-shaped groove. The fixing base is provided with a first tube groove and a second tube groove, which are arranged opposite to each other. The tube fixing mechanism is disposed on the fixing base for fixing the hemodialysis catheter in the first tube groove and the second tube groove.

[0004] The aforementioned comparative documents also have the following shortcomings:

[0005] 1. Using a standard arm restraint with a retainer and Velcro strap for arm binding, the restraint itself has no elastic structure. When the patient's arm muscles (such as the palmaris longus muscle) change circumference due to slight movement, the restraint cannot adaptively adjust its tightness, easily resulting in problems such as being too tight and affecting blood circulation, or being too loose and causing slippage.

[0006] 2. By pressing down the entire fixed plate and locking the position with the locking nut, a rigid compressive force is applied to the hemodialysis tube. The pressure is difficult to control precisely. If it is tightened too much, it will directly cause deformation of the lumen and obstruct blood flow; if it is loosened, it will not be fixed firmly. Utility Model Content

[0007] To overcome the above-mentioned defects, this utility model provides a hemodialysis tubing fixation and protection device, which solves the problems of existing hemodialysis tubing fixation and protection devices not being able to securely fix the patient's arm and the uneven distribution of squeezing force on the hemodialysis tubing.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a hemodialysis catheter fixing and protection device, comprising a main support base, wherein the main support base is provided with a receiving groove for accommodating the patient's arm, and an arrow mark is provided in the receiving groove to indicate the direction of the patient's arm placement; a secondary support base is fixedly connected to one side of the main support base, and the secondary support base is used to limit and protect the hemodialysis catheter.

[0009] An arm limiting mechanism includes two sliding buckles fixedly connected to the side of the main support base near the auxiliary support base. On the other side of the main support base, a main strap and an auxiliary strap are fixedly connected along the direction marked by the arrow. The main straps are provided with Velcro for fixing, but a portion of elastic band is spliced ​​in the middle of the main straps. The main straps and the auxiliary straps are both provided with sliding buckles on the corresponding side.

[0010] The secondary support is also equipped with a hemodialysis tube locking mechanism for locking the hemodialysis tube.

[0011] A limiting plate is provided on the auxiliary support base. A positioning plate is fixedly connected to the bottom of the limiting plate. A pressing plate is provided at the bottom of the positioning plate. Two positioning rods are fixedly connected to the top of the pressing plate. The positioning rods pass through the limiting plate and the positioning plate and are slidably connected to them. An anti-detachment block is fixedly connected to the top of the positioning rod. A tension spring is sleeved on the outside of the positioning rod. The two ends of the tension spring are fixedly connected to the anti-detachment block and the limiting plate, respectively.

[0012] As a further embodiment of this utility model: the hemodialysis tube locking mechanism includes two arc-shaped limiting grooves opened on the secondary support seat, and two through sliding holes and one threaded hole are opened on the secondary support seat between the two arc-shaped limiting grooves, with the threaded hole opened between the two through sliding holes.

[0013] As a further embodiment of this utility model: the bottom of the limiting plate is fixedly connected to two limiting shafts, the limiting shafts are slidably connected to the through sliding holes on the corresponding side, and the bottom of the limiting plate is rotatably connected to a screw that matches the threaded hole, the screw being threadedly connected to the threaded hole.

[0014] As a further embodiment of this utility model: a knob is rotatably connected to the top of the secondary support base corresponding to the screw position, and the knob is coaxially and fixedly connected to the screw.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention employs a sliding buckle combined with a bidirectional overlapping strap design for arm fixation. The main and secondary straps are threaded through corresponding sliding buckles, then overlap in opposite directions using the buckles as fulcrums, and finally locked with Velcro, forming a bidirectional constraint. This effectively prevents strap slippage or misalignment caused by unilateral force, resulting in a more secure and stable fixation. Simultaneously, an elastic band is spliced ​​in the middle of the main strap, which can elastically adapt to changes in circumference caused by slight movements of the patient's forearm muscles (such as palmaris longus and extensor carpi brachii brevis). This prevents the strap from loosening due to muscle tension while also avoiding excessive tightness that could affect blood circulation in the extremities, significantly improving comfort and safety during prolonged hemodialysis treatment. Furthermore, arrow markings are placed within the receiving slot to guide the patient to position their arm correctly, ensuring precise alignment of the tubing with the locking mechanism and reducing the risk of tubing twisting or traction caused by improper positioning.

[0017] This invention features a locking mechanism for hemodialysis tubing. Two arc-shaped limiting grooves are created on the secondary support base, working in conjunction with a liftable limiting plate and a pressure plate at its bottom. A manual knob drives a screw to precisely raise and lower the limiting plate along a through-hole, enabling rapid tubing positioning and convenient disassembly. The core improvement lies in the positioning rod connected to the top of the pressure plate and fitted with a tension spring. This allows the pressure plate to apply an elastically adjustable downward pressure to the hemodialysis tubing, rather than rigid compression. The spring's elastic restoring force ensures reliable tubing locking, preventing displacement and detachment, and automatically adjusts the pressure according to the tubing diameter and wall hardness, avoiding excessive deformation of the lumen due to excessive pressure and ensuring smooth blood flow. Simultaneously, the arc-shaped limiting grooves and the pressure plate form a wrap-around positioning system, combined with the guiding effect of the limiting shaft, making tubing fixation more stable and operation easier, effectively overcoming the shortcomings of traditional nut tightening methods that are prone to over- or under-pressure. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the secondary support portion of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the limiting plate part of this utility model.

[0021] In the diagram: 1. Main support seat; 2. Receiving groove; 3. Secondary support seat; 4. Arm limiting mechanism; 41. Sliding buckle; 42. Main strap; 43. Secondary strap; 5. Hemodialysis tube locking mechanism; 51. Arc-shaped limiting groove; 52. Limiting plate; 53. Limiting shaft; 54. Screw; 55. Knob; 56. Positioning plate; 57. Pressure plate; 58. Tension spring. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0023] like Figures 1-3 As described above, this utility model provides a technical solution:

[0024] A hemodialysis catheter fixing and protection device, comprising:

[0025] The main support 1 has a receiving groove 2 for accommodating the patient's arm. The receiving groove 2 has an arrow mark to indicate the direction of the patient's arm. A secondary support 3 is fixedly connected to one side of the main support 1. The secondary support 3 is used to limit and protect the hemodialysis tube.

[0026] The arm limiting mechanism 4 includes two sliding buckles 41 fixedly connected to the side of the main support 1 near the auxiliary support 3. On the other side of the main support 1, a main strap 42 and an auxiliary strap 43 are fixedly connected in the direction of the arrow. The main strap 42 is equipped with Velcro for fixing, but the middle of the main strap 42 is spliced ​​with a part of elastic band. The main strap 42 and the auxiliary strap 43 are both threaded through the corresponding sliding buckle 41. After the main strap 42 and the auxiliary strap 43 are threaded through the sliding buckle 41, they are overlapped in opposite directions with the sliding buckle 41 as the fulcrum and fixed with Velcro. The patient's arm must be positioned according to the arrow. Since there are fewer muscles in the wrist, but more muscles such as palmaris longus and extensor carpi brachii brevis in the forearm, the elastic band design on the main strap 42 can avoid the strap loosening caused by muscle tension due to the patient's hand movement.

[0027] The secondary support 3 is also equipped with a hemodialysis tube locking mechanism 5 for locking the hemodialysis tube.

[0028] The hemodialysis catheter locking mechanism 5 includes two arc-shaped limiting grooves 51 formed on the auxiliary support base 3. Two through-holes and a threaded hole are formed on the auxiliary support base 3 between the two arc-shaped limiting grooves 51. The threaded hole is formed between the two through-holes. A limiting plate 52 is provided on the auxiliary support base 3. Two limiting shafts 53 are fixedly connected to the bottom of the limiting plate 52. The limiting shafts 53 are slidably connected to the through-holes on the corresponding side. A screw 54 matching the threaded hole is rotatably connected to the bottom of the limiting plate 52. The screw 54 is threaded into the threaded hole. A knob 55 is rotatably connected to the top of the auxiliary support base 3 corresponding to the position of the screw 54. The knob 55 is coaxially fixedly connected to the screw 54. A positioning plate 56 is fixedly connected to the bottom of the limiting plate 52. The bottom of the positioning plate 56 is provided with... The pressure plate 57 has two positioning rods fixedly connected to its top. The positioning rods pass through the limiting plate 52 and the positioning plate 56 and are slidably connected to them. An anti-detachment block is fixedly connected to the top of the positioning rod. A tension spring 58 is sleeved on the outside of the positioning rod. The two ends of the tension spring 58 are fixedly connected to the anti-detachment block and the limiting plate 52, respectively. The hemodialysis tube is accommodated between the arc-shaped limiting groove 51 and the positioning groove. The screw 54 is controlled by manually rotating the knob 55, thereby controlling the overall height of the limiting plate 52, thus completing the positioning and disassembly of the hemodialysis tube. The pressure plate 57 fits against the top of the hemodialysis tube. The design of the tension spring 58 on its top positioning rod makes its downward pressure more gentle, avoiding excessive deformation of the hemodialysis tube due to excessive pressure, which would affect blood flow.

[0029] The working principle of this utility model is as follows:

[0030] First, during the arm fixation process, the patient needs to position their arm according to the arrow markings in the receiving slot 2 of the main support seat 1. The main strap 42 and the secondary strap 43 are then passed through the sliding buckles 41 on both sides, and the straps are overlapped in opposite directions using the sliding buckles 41 as fulcrums, and then fixed with Velcro. At the same time, the elastic band spliced ​​in the middle of the main strap 42 can provide elastic compensation according to the slight changes in the tightness of the arm muscles (such as the palmaris longus muscle), so as to avoid the straps from loosening due to muscle tension caused by the patient's hand movements. Secondly, in the locking process of the hemodialysis tube, the tube is placed into the two arc-shaped limiting grooves 51 on the auxiliary support seat 3. By manually turning the knob 55, the screw 54 is driven to rotate in the threaded hole, thereby driving the limiting plate 52 and the positioning plate 56 at its bottom to move up and down along the through sliding hole until the pressure plate 57 at the bottom of the positioning plate 56 is in contact with the top of the hemodialysis tube. At this time, the tension spring 58 of the positioning rod is in a stretched state, and its elastic restoring force can make the pressure plate 57 apply a gentle and adaptive downward pressure to the hemodialysis tube, which not only completes the positioning and locking of the tube, but also effectively avoids the rigid compression that causes excessive deformation of the lumen and affects blood flow.

[0031] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A device for fixing and protecting hemodialysis tubing, characterized in that, include: The main support (1) has a receiving groove (2) for accommodating the patient's arm. The receiving groove (2) has an arrow mark to indicate the direction of the patient's arm. A secondary support (3) is fixedly connected to one side of the main support (1). The secondary support (3) is used to limit and protect the hemodialysis tube. Arm limiting mechanism (4), the arm limiting mechanism (4) includes two sliding buckles (41) fixedly connected to the side of the main support base (1) near the auxiliary support base (3). The other side of the main support base (1) is fixedly connected with a main strap (42) and an auxiliary strap (43) respectively along the direction marked by the arrow. The main strap (42) is provided with Velcro for fixing, but the middle of the main strap (42) is spliced ​​with a part of elastic band. The main strap (42) and the auxiliary strap (43) are both provided with sliding buckles (41) on the corresponding side. The secondary support (3) is also provided with a hemodialysis tube locking mechanism (5) for locking the hemodialysis tube. A limiting plate (52) is provided on the auxiliary support base (3). A positioning plate (56) is fixedly connected to the bottom of the limiting plate (52). A pressing plate (57) is provided at the bottom of the positioning plate (56). Two positioning rods are fixedly connected to the top of the pressing plate (57). The positioning rods pass through the limiting plate (52) and the positioning plate (56) and are slidably connected to them. An anti-detachment block is fixedly connected to the top of the positioning rod. A tension spring (58) is sleeved on the outside of the positioning rod. The two ends of the tension spring (58) are fixedly connected to the anti-detachment block and the limiting plate (52) respectively.

2. The hemodialysis tubing fixing and protection device according to claim 1, characterized in that: The hemodialysis tube locking mechanism (5) includes two arc-shaped limiting grooves (51) on the auxiliary support (3). The auxiliary support (3) has two through sliding holes and one threaded hole between the two arc-shaped limiting grooves (51). The threaded hole is located between the two through sliding holes.

3. The hemodialysis tubing fixing and protection device according to claim 2, characterized in that: The bottom of the limiting plate (52) is fixedly connected to two limiting shafts (53), the limiting shafts (53) are slidably connected to the through sliding holes on the corresponding side, and the bottom of the limiting plate (52) is rotatably connected to a screw (54) that matches the threaded hole, the screw (54) being threadedly connected to the threaded hole.

4. The hemodialysis tubing fixing and protection device according to claim 3, characterized in that: The top of the secondary support base (3) is rotatably connected to the screw (54), and the knob (55) is coaxially fixedly connected to the screw (54).

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