An arm port puncture training simulation device

Abstract

The utility model provides a kind of arm infusion port puncture training simulation device, including the simulation seat with seat body, the top surface of seat body is equipped with the inner embedding slot of the fat simulation layer inside embedding, the top surface of fat simulation layer is equipped with the port seat groove of the infusion port seat inside embedding, infusion port seat has the liquid storage cavity of opening upwards, the top of liquid storage cavity is provided with diaphragm, the top surface of seat body is provided with the skin simulation layer covered on fat simulation layer. The surface layer of this arm infusion port puncture training simulation device is made of the skin simulation layer of silica gel, the fat simulation layer of sponge is made in inner layer, the layered bionic structure of above-mentioned has the level of real human tissue, so that trainer can obtain close real hand feeling experience in operation, and training effect is better.

Description

Technical Field

[0001] This utility model relates to the technical field of port-of-care puncture training models, and in particular to a training simulation device for arm port-of-care puncture. Background Technology

[0002] An infusion port, also known as an implantable central venous catheter system or a fully implantable intravenous drug delivery device, is a closed venous system that can be completely implanted into the body. It mainly consists of a venous catheter with its tip located in the superior vena cava, an injection port embedded under the skin for puncture, and a non-traumatic needle (butterfly needle).

[0003] In the field of medical care, port-a-cath insertion is an important procedural skill, especially in hematology and oncology, where the clinical application of arm port-a-caths is becoming increasingly widespread. Port-a-cath insertion requires specialized prosthetic procedure training and qualification before it can be performed on patients. Otherwise, if the butterfly needle is inserted incorrectly and fails to enter the port-a-cath, the fluid will be administered directly subcutaneously, potentially causing local swelling and pain, and in severe cases, tissue necrosis. If the butterfly needle is inserted too deeply into the port-a-cath, it may touch the inner surface of the port-a-cath, damaging the needle tip and causing partial blockage.

[0004] Chinese patent CN205621343U discloses a simulated human port-in-the-way puncture model, comprising a port-in-the-way with a puncture septum, a silicone-filled base, and a catheter. The puncture septum is centrally located, surrounded by the silicone-filled base, and the catheter passes through the silicone-filled base to connect the puncture septum to the outside. When using this simulated human port-in-the-way puncture model, medical personnel practice port-in-the-way puncture by piercing the puncture septum with a butterfly needle.

[0005] The existing technical solutions mentioned above have the following drawbacks: Since a port-a-cath is an infusion device implanted under the skin, when performing port-a-cath puncture, the butterfly needle needs to pass through the skin first and then puncture the septum. This simulated human port-a-cath puncture model only allows medical staff to practice the action of puncturing the septum, lacking the sense of layering of real human tissue (such as skin and fat with different tactile sensations), making it difficult for trainees to obtain a near-realistic tactile experience during operation, resulting in poor training effect. Utility Model Content

[0006] The present invention aims to address the aforementioned shortcomings in the prior art by providing a training simulation device for arm port-aqueduct puncture, which solves the problem of poor training effect in the prior art.

[0007] The above-mentioned utility model objective is achieved through the following technical solution: a training simulation device for arm port-aqueduct puncture, comprising a simulation seat with a base, an embedded groove for an internally embedded fat simulation layer on the top surface of the base, a port-aqueduct groove for an internally embedded port-aqueduct on the top surface of the fat simulation layer, the port-aqueduct having an upward-facing fluid storage cavity, a diaphragm on the top of the fluid storage cavity, and a skin simulation layer covering the fat simulation layer on the top surface of the base.

[0008] The present invention is further configured such that: a retaining ring groove is provided circumferentially on the wall of the liquid storage chamber, and a protruding ring is provided circumferentially on the outer wall of the diaphragm to engage with the retaining ring groove.

[0009] The present invention is further configured such that: a pressure sensor is provided on the bottom wall of the liquid storage chamber, a pressure plate is slidably disposed in the liquid storage chamber and placed on the pressure sensor, a controller connected to the pressure sensor is provided on the outer wall of the base, and the controller is connected to an audible and visual alarm.

[0010] The present invention is further configured such that: an inner through hole communicating with the reservoir cavity is opened on the outer wall of the infusion port seat; a middle through hole aligned with the inner through hole is opened on the outer wall of the fat simulation layer; an outer through hole aligned with the middle through hole is opened on the side wall of the seat away from the simulated palm; and the connecting wire of the pressure sensor passes through the inner through hole, the middle through hole and the outer through hole in sequence and is connected to the controller.

[0011] The present invention is further configured such that the material of the fat simulation layer is a sponge.

[0012] The present invention is further configured such that the material of the skin simulation layer is silicone.

[0013] The present invention is further configured such that: an upper fixing hole is provided on the top surface of the skin simulation layer, a middle fixing hole is provided on the top surface of the fat simulation layer and aligned below the upper fixing hole, and a locking hole with a gradually decreasing diameter and a lower fixing hole aligned with the middle fixing hole are provided sequentially on the bottom surface of the base, and a fixing member for fixing the skin simulation layer and the fat simulation layer is provided through the upper fixing hole, the middle fixing hole and the lower fixing hole.

[0014] The present invention is further configured such that: the fixing member includes an outer fixing shell that passes through the upper fixing hole, the middle fixing hole and the lower fixing hole in sequence and has an inner shell cavity inside; the upper part of the outer side wall of the outer fixing shell is provided with an upper limit protrusion that abuts against the top surface of the skin simulation layer; a guide plate hole is provided on the outer side wall of the outer fixing shell; a lower limit sliding plate that abuts against the top wall of the locking hole is slidably disposed in the guide plate hole; and a push-pull assembly is provided in the inner shell cavity, which drives the lower limit sliding plate to reciprocate linearly along the guide plate hole by pushing and pulling the lower limit sliding plate.

[0015] The present invention is further configured such that: the push-pull assembly includes a rotary shaft rotatably disposed on the upper part of the inner shell cavity, a hinge shaft coaxially disposed below the rotary shaft, a hinge seat disposed on the axial surface of the hinge shaft, and a connecting rod. One end of the connecting rod is hinged to the hinge shaft through the hinge seat, and the other end is hinged to the lower limit slide plate. An opening is provided on the top surface of the outer fixed shell, and a torsion shaft passing through the opening is provided on the top surface of the rotary shaft.

[0016] The present invention is further configured such that: after the torsion shaft passes through the opening, a torsion head is provided, and a lock head buckle is hinged to the end of the torsion head away from the torsion shaft; and a lock head slot is provided on the top of the outer side wall of the outer fixed shell to engage with the lock head buckle.

[0017] In summary, the beneficial technical effects of this utility model are as follows:

[0018] (1) The outer layer of this arm infusion port puncture training simulation device is made of silicone skin simulation layer and the inner layer is made of sponge fat simulation layer. The above-mentioned layered biomimetic structure has the sense of layering of real human tissue, so that trainees can get a close-to-real tactile experience during operation and the training effect is better.

[0019] (2) This arm port puncture training simulation device detects the puncture depth by setting a pressure sensor, controller and audible and visual alarm. When an incorrect operation is performed, the audible and visual alarm is triggered to remind medical staff that an incorrect operation has been performed.

[0020] (3) This arm port puncture training simulation device uses a fixing component to press and limit the skin simulation layer and fat simulation layer. The fixing component can be removed and installed without the need for other tools. The skin simulation layer and fat simulation layer are easy to remove and replace. Worn parts can be replaced individually, which helps to reduce maintenance costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the arm port-in-the-lamp training simulation device of this utility model;

[0022] Figure 2 This is a partial cross-sectional view of the arm infusion port puncture training simulation device of this utility model;

[0023] Figure 3 This is a cross-sectional view of the infusion port in this utility model;

[0024] Figure 4 This is a cross-sectional view of the arm infusion port puncture training simulation device of this utility model;

[0025] Figure 5 This is a structural schematic diagram of the fixing component in this utility model.

[0026] In the above attached diagrams: 1. Simulation seat; 2. Seat body; 3. Simulation hand; 4. Inner groove; 5. Fat simulation layer; 6. Portal slot; 7. Infusion port; 8. Reservoir chamber; 9. Snap ring groove; 10. Diaphragm; 11. Protruding ring; 12. Pressure sensor; 13. Pressure plate; 14. Inner wire hole; 15. Middle wire hole; 16. Outer wire hole; 17. Controller; 18. Audible and visual alarm; 19. Skin simulation layer; 20. Upper... 21. Fixing hole; 22. Middle fixing hole; 23. Locking hole; 24. Lower fixing hole; 25. Fixing component; 26. Outer fixing shell; 27. Semi-fixing shell; 28. Upper limit protrusion plate; 29. ​​Inner shell cavity; 20. Guide plate hole; 31. Lower limit sliding plate; 32. Rotary shaft; 33. Hinge shaft; 34. Hinge seat; 35. Connecting rod; 36. Opening; 37. Torsion shaft; 38. Torsion head; 39. Lock head latch; 30. Lock head slot. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] like Figure 1 As shown, this utility model proposes a training simulation device for arm infusion port puncture, including a simulation seat 1. The simulation seat 1 includes a seat body 2 and a simulated hand 3. The cross-section of the seat body 2 is racetrack-shaped, and the upper and lower end faces of the seat body 2 are flat, so that the simulation seat 1 can be placed relatively stably on a table or workbench. The simulated hand 3 is fixedly installed at the end of the seat body 2.

[0029] like Figure 2 As shown, an embedded groove 4 with a rectangular cross-section is provided on the top surface of the seat 2. A fat simulation layer 5 is embedded in the embedded groove 4. The top surface of the fat simulation layer 5 is flush with the top surface of the seat 2. The fat simulation layer 5 is made of a material with a certain softness and thickness, such as a sponge, to simulate the texture of human fat tissue.

[0030] like Figure 2 and 3 As shown, a circular cross-section port groove 6 is formed at the center of the top surface of the fat simulation layer 5. A cylindrical infusion port 7 is embedded in the port groove 6. The infusion port 7 has an upward-opening reservoir 8 in the middle. The reservoir 8 has a circular cross-section, and a retaining ring groove 9 is formed circumferentially on the top of the reservoir wall. The retaining ring groove 9 has an annular cross-section. A circular plate-shaped diaphragm 10 is provided on the top of the reservoir 8. The diaphragm 10 is made of silicone, and a protruding ring 11 is formed circumferentially on the outer wall of the diaphragm 10 to engage with the retaining ring groove 9.

[0031] like Figure 2As shown, a pressure sensor 12 is screwed to the bottom wall of the liquid storage chamber 8, and a pressure plate 13 is provided inside the liquid storage chamber 8 that slides with the liquid storage chamber 8. The pressure plate 13 is placed on the pressure sensor 12.

[0032] like Figure 2 As shown, the outer wall of the infusion port 7 is provided with an inner threading hole 14 that communicates with the reservoir 8, the outer wall of the fat simulation layer 5 is provided with a middle threading hole 15 that is aligned with the inner threading hole 14, and the side wall of the seat 2 away from the simulated palm 3 is provided with an outer threading hole 16 that is aligned with the middle threading hole 15. The inner threading hole 14, the middle threading hole 15 and the outer threading hole 16 are all circular holes.

[0033] like Figure 1 and 2 As shown, a controller 17 is screwed onto the side wall of the base 2 away from the simulated hand 3. The connecting wire of the pressure sensor 12 passes through the inner wire hole 14, the middle wire hole 15, and the outer wire hole 16 in sequence before connecting to the controller 17. The controller 17 is electrically connected to an audible and visual alarm 18 via a connecting wire. The audible and visual alarm 18 is an existing audible and visual alarm device. When the audible and visual alarm 18 is working, it can emit a slow-frequency flashing red light and simultaneously activate the voice alarm to emit a "penetration too deep" sound.

[0034] like Figure 1 and 2 As shown, a skin simulation layer 19 is provided on the top surface of the seat 2, which covers the fat simulation layer 5. The skin simulation layer 19 is made of a soft and elastic material, such as silicone, to simulate the touch and elasticity of real skin.

[0035] Key points for port-a-cath puncture: 1. When puncturing a port-a-cath, the tip of the butterfly needle must be inserted vertically. Tilt or wobbling is strictly prohibited to ensure that the tip of the butterfly needle does not accidentally pierce the wall of the reservoir 8; 2. The puncture should be performed gently. If resistance is felt, do not blindly force the needle in, to prevent the tip of the butterfly needle from grinding against the bottom wall of the reservoir 8.

[0036] The detailed working process of the arm port-acupoint puncture training simulation device in this embodiment is as follows:

[0037] S1: Medical staff operate the butterfly needle to pierce the skin simulation layer 19 and diaphragm 10 in sequence and insert it into the fluid reservoir 8. When the tip of the butterfly needle contacts the pressure plate 13, the pressure sensor 12 senses the pressure and outputs a current signal to the input terminal of the controller 17 through the connecting wire. The controller 17, which is powered on, activates the audible and visual alarm 18, which emits a slow-frequency flashing red light and simultaneously activates the voice alarm to emit the sound of "puncture too deep".

[0038] S2: If the audible and visual alarm 18 is not activated, it indicates that the puncture depth of the butterfly needle has not exceeded the limit. At this time, the instructor can judge whether the butterfly needle is inserted at an angle by observing whether the needle tip is inserted vertically.

[0039] The outer layer of this arm infusion port puncture training simulation device is made of silicone skin simulation layer 19, and the inner layer is made of sponge fat simulation layer 5. The above-mentioned layered biomimetic structure has the sense of layering of real human tissue, so that the trainee can get a near-realistic tactile experience during operation, and the training effect is better.

[0040] This arm port-infusion puncture training simulation device detects puncture depth by setting up a pressure sensor 12, a controller 17, and an audible and visual alarm 18. In case of incorrect operation, the audible and visual alarm 18 is triggered to remind medical staff that an incorrect operation has been performed.

[0041] like Figure 4 As shown, two circular upper fixation holes 20 are symmetrically formed on the top surface of the skin simulation layer 19, and the two upper fixation holes 20 are symmetrically distributed on both sides of the infusion port 7. Two circular middle fixation holes 21 are symmetrically formed on the top surface of the fat simulation layer 5, and the two middle fixation holes 21 are symmetrically distributed on both sides of the infusion port 7, and the middle fixation holes 21 are aligned and positioned below the upper fixation holes 20.

[0042] like Figure 4 As shown, a locking hole 22 and a lower fixing hole 23 are sequentially opened on the bottom surface of the base 2. Both the locking hole 22 and the lower fixing hole 23 are circular holes. The diameter of the locking hole 22 is larger than that of the lower fixing hole 23. The lower fixing hole 23 is aligned and set below the middle fixing hole 21. The lower fixing hole 23 has the same diameter as the middle fixing hole 21 and the upper fixing hole 20.

[0043] like Figure 4 and 5 As shown, a fixing member 24 is inserted through the upper fixing hole 20, the middle fixing hole 21, and the lower fixing hole 23. The fixing member 24 is used to fix the skin simulation layer 19 and the fat simulation layer 5. The fixing member 24 includes a cylindrical outer fixing shell 25, which can pass through the upper fixing hole 20, the middle fixing hole 21, and the lower fixing hole 23 from top to bottom. The outer fixing shell 25 is composed of a pair of half fixing shells 251 spliced ​​together. The two half fixing shells 251 are glued together by applying glue to the mating surface.

[0044] like Figure 4 and 5As shown, a circular upper limit plate 26 is fixedly connected to the upper part of the outer side wall of the outer fixing shell 25. The upper limit plate 26 is disposed in two halves on the two half fixing shells 251. When this fixing component 24 is working, the bottom surface of the upper limit plate 26 abuts against the top surface of the skin simulation layer 19. The upper limit plate 26 is used to press and limit the skin simulation layer 19 and the fat simulation layer 5 located below the upper limit plate 26.

[0045] like Figure 4 and 5 As shown, the outer fixing shell 25 has an inner shell cavity 27 inside, and the inner shell cavity 27 has a circular cross-section. The inner shell cavity 27 is split in half on the two half-fixing shells 251. Two guide plate holes 28 are symmetrically opened on the outer side wall of the outer fixing shell 25. The guide plate holes 28 have a rectangular cross-section and are split in half on the two half-fixing shells 251. A lower limit slide plate 29 is slidably disposed in each guide plate hole 28. When the lower limit slide plate 29 slides out of the guide plate hole 28 and its top surface abuts against the top wall of the locking hole 22, the lower limit slide plate 29 cooperates with the upper limit protrusion 26 to restrict the vertical movement of the outer fixing shell 25. At this time, the upper limit protrusion 26 presses and limits the skin simulation layer 19 and the fat simulation layer 5.

[0046] like Figure 4 and 5 As shown, a push-pull assembly is provided in the inner shell cavity 27. The push-pull assembly drives the lower limit slide plate 29 to reciprocate linearly along the guide plate hole 28 by pushing and pulling the lower limit slide plate 29. The push-pull assembly includes a rotary shaft 30, a hinge shaft 31, a hinge seat 32, and a connecting rod 33.

[0047] like Figure 4 and 5 As shown, the rotary shaft 30 is cylindrical and rotatably mounted on the upper part of the inner shell cavity 27, with the rotary shaft 30 and the inner shell cavity 27 in a rotatable fit. The hinge shaft 31 is cylindrical and coaxially mounted below the rotary shaft 30, with two mutually symmetrical hinge seats 32 fixedly connected to the hinge shaft 31. One end of the connecting rod 33 is hinged to the hinge shaft 31 through the hinge seat 32, and the other end is hinged to the lower limit slide plate 29.

[0048] like Figure 4 and 5 As shown, an opening 34 is provided at the center of the top surface of the outer fixed shell 25, which communicates with the inner shell cavity 27. The opening 34 is a circular hole. A torsion shaft 35 passing through the opening 34 is coaxially fixed to the top surface of the rotary shaft 30. The torsion shaft 35 is used to provide a force application point for medical personnel to rotate the rotary shaft 30 and the hinge shaft 31.

[0049] like Figure 4 and 5As shown, the torsion shaft 35 passes through the opening 34 and is fixedly connected to the torsion head 36. The torsion head 36 is used to provide a force point for medical staff to rotate the torsion shaft 35. The end of the torsion head 36 away from the torsion shaft 35 is hinged to the locking buckle 37. The top of the outer wall of the outer fixed shell 25 is provided with a locking groove 38 that engages with the locking buckle 37. The locking groove 38 is a rectangular groove and is split in half on the two half fixed shells 251.

[0050] The detailed installation process of the fat simulation layer 5 and the skin simulation layer 19 in this embodiment is as follows:

[0051] S1: Medical staff embed the fat simulation layer 5 into the inner groove 4. At this time, the middle fixation hole 21 is aligned with the lower fixation hole 23. Then, the skin simulation layer 19 is covered on the fat simulation layer 5, and the upper fixation hole 20 and the middle fixation hole 21 are aligned.

[0052] S2: Medical staff pass the outer fixation shell 25 through the upper fixation hole 20, the middle fixation hole 21 and the lower fixation hole 23 from top to bottom until the bottom surface of the upper limit convex plate 26 abuts against the top surface of the skin simulation layer 19. Then, the torsion shaft 35, the rotation shaft 30 and the hinge shaft 31 are rotated by the torsion head 36. The rotation of the hinge shaft 31 will push the lower limit slide plate 29 out of the guide plate hole 28 through the connecting rod 33. At this time, the top surface of the lower limit slide plate 29 abuts against the top wall of the locking hole 22. The lower limit slide plate 29 cooperates with the upper limit convex plate 26 to restrict the up and down movement of the outer fixation shell 25. At this time, the upper limit convex plate 26 presses and limits the skin simulation layer 19 and the fat simulation layer 5.

[0053] S3: Medical staff rotate the lock buckle 37 so that the lock buckle 37 is engaged in the lock slot 38. At this time, the rotation of the torsion head 36, the torsion shaft 35, the rotation shaft 30 and the hinge shaft 31 is restricted. The lower limit slide plate 29 remains in the state of sliding out of the guide plate hole 28 and the top surface abutting against the top wall of the locking hole 22. The upper limit convex plate 26 remains in the state of pressing and limiting the skin simulation layer 19 and the fat simulation layer 5.

[0054] This arm port-acupuncture training simulation device uses a fixing element 24 to press and limit the skin simulation layer 19 and the fat simulation layer 5. The fixing element 24 can be installed and removed without the aid of other tools, and the skin simulation layer 19 and the fat simulation layer 5 are easy to install and remove. Worn parts can be replaced individually, which helps to reduce maintenance costs.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A training simulation device for arm port-a-cath puncture, characterized in that: The device includes a simulation seat (1) with a base (2). The top surface of the base (2) has an embedded groove (4) for embedding a fat simulation layer (5). The top surface of the fat simulation layer (5) has a port groove (6) for embedding an infusion port (7). The infusion port (7) has an upward-facing reservoir (8). A diaphragm (10) is provided on the top of the reservoir (8). A skin simulation layer (19) covering the fat simulation layer (5) is provided on the top surface of the base (2).

2. The arm port-a-cath puncture training simulation device according to claim 1, characterized in that: The wall of the liquid storage chamber (8) is provided with a retaining ring groove (9) in the circumferential direction, and the outer wall of the diaphragm (10) is provided with a protruding ring (11) that engages with the retaining ring groove (9) in the circumferential direction.

3. The arm port-a-cath puncture training simulation device according to claim 1, characterized in that: A pressure sensor (12) is provided on the bottom wall of the liquid storage chamber (8). A pressure plate (13) is slidably arranged in the liquid storage chamber (8) and placed on the pressure sensor (12). A controller (17) connected to the pressure sensor (12) is provided on the outer wall of the seat (2). The controller (17) is connected to an audible and visual alarm (18).

4. The arm port-a-cath puncture training simulation device according to claim 3, characterized in that: The infusion port (7) has an inner thread hole (14) on its outer side wall that communicates with the reservoir (8). The fat simulation layer (5) has a middle thread hole (15) on its outer side wall that is aligned with the inner thread hole (14). The seat (2) has an outer thread hole (16) on its side wall away from the simulated hand (3) that is aligned with the middle thread hole (15). The connecting wire of the pressure sensor (12) passes through the inner thread hole (14), the middle thread hole (15) and the outer thread hole (16) in sequence and is connected to the controller (17).

5. The arm port-a-cath puncture training simulation device according to claim 1, characterized in that: The material of the fat simulation layer (5) is a sponge.

6. The arm port-a-cath puncture training simulation device according to claim 1, characterized in that: The material of the skin simulation layer (19) is silicone.

7. The arm port-a-cath puncture training simulation device according to claim 1, characterized in that: The skin simulation layer (19) has an upper fixing hole (20) on its top surface, and the fat simulation layer (5) has a middle fixing hole (21) aligned with the upper fixing hole (20) on its top surface. The base (2) has a locking hole (22) with a gradually decreasing diameter and a lower fixing hole (23) aligned with the middle fixing hole (21) on its bottom surface. Fixing members (24) for fixing the skin simulation layer (19) and the fat simulation layer (5) are inserted into the upper fixing hole (20), the middle fixing hole (21) and the lower fixing hole (23).

8. The arm port-a-cath puncture training simulation device according to claim 7, characterized in that: The fixing member (24) includes an outer fixing shell (25) that passes through the upper fixing hole (20), the middle fixing hole (21) and the lower fixing hole (23) in sequence and has an inner shell cavity (27). The upper part of the outer side wall of the outer fixing shell (25) is provided with an upper limit protrusion (26) that abuts against the top surface of the skin simulation layer (19). A guide plate hole (28) is provided on the outer side wall of the outer fixing shell (25). A lower limit sliding plate (29) that abuts against the top wall of the locking hole (22) is slidably arranged in the guide plate hole (28). A push-pull assembly is provided in the inner shell cavity (27) to drive the lower limit sliding plate (29) to reciprocate linearly along the guide plate hole (28) by pushing and pulling the lower limit sliding plate (29).

9. The arm port-a-cath puncture training simulation device according to claim 8, characterized in that: The push-pull assembly includes a rotary shaft (30) rotatably disposed on the upper part of the inner shell cavity (27), a hinge shaft (31) coaxially disposed below the rotary shaft (30), a hinge seat (32) disposed on the axial surface of the hinge shaft (31), and a connecting rod (33). One end of the connecting rod (33) is hinged to the hinge shaft (31) through the hinge seat (32), and the other end is hinged to the lower limit slide plate (29). An opening (34) is provided on the top surface of the outer fixed shell (25), and a torsion shaft (35) passing through the opening (34) is provided on the top surface of the rotary shaft (30).

10. The arm port-a-cath puncture training simulation device according to claim 9, characterized in that: The torsion shaft (35) is provided with a torsion head (36) after passing through the opening (34). A lock head buckle (37) is hinged to one end of the torsion head (36) away from the torsion shaft (35). A lock head slot (38) is provided on the top of the outer wall of the outer fixed shell (25) to engage with the lock head buckle (37).

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