Arm model for simulating internal arteriovenous fistula puncture

Abstract

The invention discloses an arm model for simulating internal arteriovenous fistula puncture, and the model comprises an arm model which comprises an inner base model and an epidermis model sleeving the outer side of the inner base model; the blood vessel model comprises an artery section, a vein section and an internal fistula body section; the circulating pump body is respectively connected with the end parts of the artery section and the vein section and is used for circularly conveying the blood model along the artery section and the vein section; the inner base model comprises an inner base and a plurality of thickening layers arranged outside the inner base in a sleeving mode, the artery section and the vein section are arranged corresponding to the inner sides and the outer sides / the same sides of the thickening layers respectively, and holes allowing the internal fistula body section to penetrate through are formed in the thickening layers. Through the arrangement of the thickening layers, a proper number of thickening layers can be adjusted according to simulation requirements to sleeve the inner base, so that the size of the inner base model is adjusted, and the specific positions of the artery section, the vein section and the internal fistula body section are autonomously set through the holes in the thickening layers to meet different simulation requirements.

Description

Technical Field

[0001] The invention relates to the field of puncture technology, and more specifically to an arm model for simulating autologous arteriovenous fistula (AVF) puncture. Background Art

[0002] AVF refers to the surgical anastomosis of the patient's vein to the artery to achieve venous arterialization, which allows the vein to obtain a larger blood flow to meet the high blood flow requirements during subsequent dialysis treatment, thereby improving the patient's dialysis adequacy.

[0003] Expert consensus points out: AVF puncture timing: It is best to start puncture and use 8-12 weeks after AVF angioplasty. In special cases, puncture should be started at least 1 month after the fistula matures. In the early stage of the newly built arteriovenous fistula, the vascular wall is relatively fragile, and it is easy to puncture the blood vessel to form a hematoma during puncture. Characteristics of the newly built AVF: high intravascular pressure and high vascular fragility. The first puncture is very likely to damage the fistula blood vessels, causing complications such as fistula bleeding and hematoma. In severe cases, it can even cause fistula occlusion, affecting the service life of the fistula. The first AVF puncture, as a benchmark for long-term repeated punctures, can provide planning references and guidance for repeated punctures in subsequent dialysis treatments. It poses a great challenge to the operator's level. The KDOQI guidelines also recommend that HD-related personnel (including surgeons, dialysis technicians, and nurses) undergo structured training and supervision, and regularly update training to improve the knowledge of vascular access-related care and maintenance in order to improve puncture capabilities and reduce the occurrence of infections and complications. Therefore, simulation teaching is crucial, which requires simulating puncture exercises through arm models without harming patients to improve the fistula puncture skills of medical staff.

[0004] In this regard, reference can be made to the prior patent with application number CN202121664400.4, which specifically discloses an arteriovenous fistula puncture mold, and specifically discloses the mutual cooperation between the blood vessel model and the pump body to achieve a certain simulation effect. However, this type of device still has the following shortcomings: Due to differences in blood vessel positions, arm thicknesses, etc. of different human bodies, the effect of the above-mentioned device on repeated training is poor, and it is impossible to achieve the purpose of differentiated training according to the vascular characteristics and arm differences of different patients. Therefore, it needs to be improved. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an arm model for simulating arteriovenous fistula puncture, which can adjust the blood vessel depth, position and arm thickness to meet the differentiated training needs of different patients, thereby greatly improving the training effect.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An arm model for simulating arteriovenous fistula puncture, comprising:

[0008] An arm model, which includes an inner base model and an epidermis model sleeved outside the inner base model;

[0009] A blood vessel model, which includes an arterial segment, a venous segment, and an arteriovenous fistula body segment. The two ends of the arteriovenous fistula body segment are respectively connected to the arterial segment and the venous segment;

[0010] A circulating pump body, which is respectively connected to the ends of the arterial segment and the venous segment. The circulating pump body is used to circulate and transport a blood model along the arterial segment and the venous segment;

[0011] The inner base model includes an inner base and a plurality of thickening layers sleeved outside the inner base. The arterial segment and the venous segment are respectively arranged corresponding to the inside and outside / on the same side of the thickening layer. The thickening layer is provided with holes for the arteriovenous fistula body segment to pass through.

[0012] As a further improvement of the present invention, fixing components are provided on both sides of the epidermis model and enclose to form a cylindrical structure through the fixing components. The fixing components include a first fixing point and a second fixing point group arranged on both sides of the epidermis model. The second fixing point group includes a plurality of rows of second fixing points. The first fixing point is connected to different second fixing points to adjust the size of the cylindrical structure.

[0013] As a further improvement of the present invention, both the arm model and the blood vessel model are made of light-transmitting materials, and the light transmittance of the epidermis model, the blood vessel model, and the inner base model decreases in turn.

[0014] As a further improvement of the present invention, it further includes a training base. Infrared light sources are arranged on the training base. A fixed strong magnetic part is provided on the training base. A movable strong magnetic part is movably arranged between the epidermis model and the inner base model. The movable strong magnetic part and the fixed strong magnetic part are magnetically attracted to each other to align the arm model with the infrared light source.

[0015] As a further improvement of the present invention, light-shielding cloths are symmetrically provided on the training base. One end of the light-shielding cloth is connected to the training base, and the other end is adhesively bonded to the arm model.

[0016] As a further improvement of the present invention, the circulating pump body is used to periodically transport a blood model into the arterial segment.

[0017] As a further improvement of the present invention, both ends of the venous segment and the arterial segment are detachably connected to the circulating pump body.

[0018] Advantages of the present invention: Through the setting of multiple thickening layers, it is possible to adjust the appropriate number of thickening layers to be sleeved outside the inner base according to simulation needs, so as to adjust the size of the inner base model, and the specific positions of the arterial segment, venous segment and internal fistula body segment can be set independently through the holes on the multiple thickening layers to meet different simulation needs. Description of the Drawings

[0019] Figure 1 Schematic diagram of the overall installation of the present invention;

[0020] Figure 2 Schematic diagram of the installation of the thickening layer of the present invention;

[0021] Figure 3 Schematic diagram of the training base of the present invention.

[0022] Reference numerals in the drawings: 1, inner base model; 2, epidermal model; 3, arterial segment; 4, venous segment; 5, internal fistula body segment; 6, inner base; 7, circulation pump body; 8, thickening layer; 9, hole; 10, first fixed point; 11, second fixed point; 12, training base; 13, infrared light source; 14, fixed strong magnet; 15, movable strong magnet; 16, light-shielding cloth. Detailed Embodiments

[0023] The present invention will be further described in detail below with reference to the drawings and embodiments. The same components are denoted by the same reference numerals.

[0024] As Figures 1 - 3 shown, an arm model for simulating arteriovenous internal fistula puncture includes an arm model, and the arm model includes an inner base model 1 and an epidermal model 2 sleeved outside the inner base model 1. Specifically, the arm model is specifically from the elbow joint to the wrist joint of the forearm.

[0025] It further includes a blood vessel model, and the blood vessel model includes an arterial segment 3, a venous segment 4 and an internal fistula body segment 5. Among them, the arterial segment 3, the venous segment 4 and the internal fistula body segment 5 are used to fill the blood model to simulate blood flow. The two ends of the internal fistula body segment 5 are respectively connected to the arterial segment 3 and the venous segment 4, so as to simulate the human blood vessels after internal fistula surgery.

[0026] It further includes a circulation pump body 7, and the circulation pump body 7 is respectively connected to both ends of the arterial segment 3 and the venous segment 4. The circulation pump body 7 is used to circulate the blood model in the arterial segment 3 and the venous segment 4.

[0027] Specifically, the inner base model 1 includes an inner base 6 and a plurality of thickening layers 8 sleeved outside the inner base 6. In this embodiment, the number of the thickening layers 8 is specifically 3, and the apertures of different thickening layers 8 are different. The arterial segment 3 and the venous segment 4 are respectively arranged corresponding to the inner and outer sides / same sides of the thickening layer 8, and the thickening layer 8 is provided with a hole 9 for the internal fistula body segment 5 to pass through.

[0028] Furthermore, the number of the holes 9 is multiple and they are arranged along the length direction of the thickened layer 8. Among them, plug blocks are provided at the positions where the holes 9 are not used and are blocked by the plug blocks to ensure the consistency of the thickened layer 8 at other positions.

[0029] During use, the operator selects an appropriate number of thickened layers 8 to sleeve outside the inner base 6 according to the arm to be simulated for training, and adjusts the positions of the arterial segment 3, the venous segment 4 and the internal fistula body segment 5 according to the positions of the blood vessels to be simulated. When the arterial segment 3 and the venous segment 4 are respectively located on both sides of the thickened layer 8, the internal fistula body segment 5 passes through the holes 9 and is respectively connected to the arterial segment 3 and the venous segment 4. Further, the epidermal model 2 is sleeved outside the thickened layer 8, so as to complete the simulation of the human arm. Further, the circulation pump body 7 is respectively connected to both ends of the arterial segment 3 and the venous segment 4, and a blood model is respectively conveyed into the arterial segment 3. The blood model is discharged outwards successively through the arterial segment 3, the internal fistula body segment 5 and the venous segment 4. At the same time, the arterial segment 3 realizes communication with the venous segment 4 through the internal fistula body segment 5, so as to realize the simulation of the blood vessels after internal fistula surgery. Further, the operator performs specific simulation training actions, and after the training is completed, the blood vessel model is replaced to achieve the purpose of repeated training.

[0030] Due to the existence of multiple thickened layers 8, the operator can adjust the thickness of the inner base model 1 according to the number of the thickened layers 8, and cooperate with the epidermal model 2 to adjust the thickness of the arm. Further, the positions of the venous segment 4 and the arterial segment 3 can also be adjusted through the multiple thickened layers 8, so as to realize the simulation training for different depths and positions of human arteries and veins.

[0031] Preferably, fixing components are provided on both sides of the epidermal model 2 and form a cylindrical structure by surrounding through the fixing components. The fixing components include a first fixing point 10 and a second fixing point 11 group provided on both sides of the epidermal model 2. The second fixing point 11 group includes a plurality of rows of arranged second fixing points 11. The first fixing point 10 is connected to different second fixing points 11 to adjust the size of the cylindrical structure.

[0032] Among them, the first fixing point 10 and the second fixing point 11 can be connected and fixed by means of magic tape, adhesion, buttons, etc. This part is the prior art and will not be elaborated here too much.

[0033] Through the first fixing point 10 and the multiple second fixing points 11, the thickness adjustment of the endoscope model can be cooperated to ensure the attachment of the epidermal layer and the inner base layer.

[0034] Preferably, both the arm model and the blood vessel model are made of light-transmitting materials, and the light transmittance of the epidermal model 2, the blood vessel model and the inner base model 1 decreases in turn.

[0035] Among them, the inner base 6 is made of a hard material to simulate bones and ensure the overall support of the arm model. The thickening layer 8, artery segment 3, vein segment 4, arteriovenous fistula body segment 5, and epidermis model 2 are all made of silicone material, which improves the simulation authenticity while ensuring softness.

[0036] Preferably, it further includes a training base 12. Infrared light sources 13 are arranged on the training base 12. The infrared light sources 13 are specifically near-infrared light with a wavelength of 850 nm. A fixed strong magnetic part 14 is provided on the training base 12. An active strong magnetic part 15 is movably arranged between the epidermis model 2 and the inner base model 1. The active strong magnetic part 15 and the fixed strong magnetic part 14 are magnetically attracted to each other to align the arm model with the infrared light sources 13.

[0037] During use, by moving the position of the active strong magnetic part 15, the angle of the arm model relative to the training base 12 is adjusted to simulate the arm in different inclined states. Further, through the cooperation of the infrared light sources 13 and the transparent material of the arm model, the specific positions of each tissue are displayed to further facilitate the training of the operator, making the blood vessels more intuitive and visible to improve the training effect.

[0038] At the same time, through the setting of the infrared light sources 13, when a puncture fails, the leaked blood can be observed according to the infrared light sources 13, and then it can be quickly and intuitively observed whether the puncture is successful.

[0039] Preferably, light-shielding cloths 16 are symmetrically arranged on the training base 12. One end of the light-shielding cloth 16 is connected to the training base 12, and the other end is adhesively bonded to the arm model.

[0040] Through the setting of the light-shielding cloths 16, it is possible to prevent the light from leaking from the side of the arm and directly shining into the eyes of the operator to ensure the long-term training requirements.

[0041] Preferably, the circulation pump body 7 is used to periodically transport the blood model into the artery segment 3 to simulate the blood in the artery. At the same time, the periodic supply method can make the artery segment 3 vibrate to achieve a better simulation effect.

[0042] Preferably, both ends of the vein segment 4 and the artery segment 3 are detachably connected to the circulation pump body 7. The detachable connection can use any one of the existing pipeline sealing connection methods in the prior art. This part is specifically the prior art and will not be elaborated here.

[0043] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An arm model for simulating arteriovenous fistula puncture, characterized in that, Including: An arm model, which includes an inner base model (1) and an epidermis model (2) sleeved outside the inner base model (1); A blood vessel model, which includes an arterial segment (3), a venous segment (4) and an arteriovenous fistula segment (5). The two ends of the arteriovenous fistula segment (5) are respectively connected to the arterial segment (3) and the venous segment (4); A circulation pump body (7), which is respectively connected to the ends of the arterial segment (3) and the venous segment (4). The circulation pump body (7) is used for circulating and transporting a blood model along the arterial segment (3) and the venous segment (4); The inner base model (1) includes an inner base (6) and a plurality of thickening layers (8) sleeved outside the inner base (6). The arterial segment (3) and the venous segment (4) are respectively arranged corresponding to the inner and outer sides / same side of the thickening layer (8). The thickening layer (8) is provided with holes (9) for the arteriovenous fistula segment (5) to pass through.

2. The arm model for simulating arteriovenous fistula puncture according to claim 1, wherein Both sides of the epidermis model (2) are provided with fixing components and are enclosed to form a cylindrical structure through the fixing components. The fixing components include a first fixing point (10) and a second fixing point group (11) arranged on both sides of the epidermis model (2). The second fixing group includes a plurality of second fixing points (11) arranged in multiple rows. The first fixing point (10) is connected to different second fixing points (11) to adjust the size of the cylindrical structure.

3. The arm model for simulating arteriovenous fistula puncture according to claim 1, characterized in that Both the arm model and the blood vessel model are made of light-transmitting materials, and the light transmittance of the epidermis model (2), the blood vessel model and the inner base model (1) decreases in turn.

4. The arm model for simulating arteriovenous fistula puncture according to claim 1, wherein, It further includes a training base (12). Infrared light sources (13) are arranged on the training base (12). A fixed strong magnetic part (14) is arranged on the training base (12). A movable strong magnetic part (15) is movably arranged between the epidermis model (2) and the inner base model (1). The movable strong magnetic part (15) and the fixed strong magnetic part (14) are magnetically attracted to each other to align the arm model and the infrared light sources (13).

5. The arm model for simulating arteriovenous fistula puncture according to claim 4, characterized in that, Light-shielding cloths (16) are symmetrically arranged on the training base (12). One end of the light-shielding cloth (16) is connected to the training base (12), and the other end is adhesively bonded to the arm model.

6. A forearm model for simulating arteriovenous fistula puncture according to any one of claims 1-5, characterized in that The circulation pump body (7) is used for periodically transporting a blood model into the arterial segment (3).

7. A kind of arm model for simulating arteriovenous fistula puncture according to any one of claims 1-5, characterized in that, Both ends of the venous segment (4) and the arterial segment (3) are detachably connected to the circulation pump body (7).

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