An esophageal stent slippage test device
By designing a test device that simulates peristalsis and contraction of the esophageal tube, the problem of slip caused by poor stability of the esophageal stent is solved, and high accuracy detection of the stability of the esophageal stent is achieved.
Patent Information
- Application Number
- CN202211328803.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-10-27
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2042-10-27
AI Technical Summary
In clinical applications, existing esophageal stents are prone to slip into the patient's stomach due to poor stability, causing pain in the patient and requiring surgical removal.
A esophageal stent slip testing equipment is designed, including sealing chambers, lifting devices, extrusion devices and esophageal model tubes. By simulating the contraction and peristalsis of the esophageal tubes, the stability of the esophageal stent is detected.
By simulating the peristalsis and contraction of the esophageal tube, the testing equipment can better reduce the stress of the esophageal stent in the esophageal tube, improving the accuracy of detection of the stability of the esophageal stent.
Smart Images
Figure CN115560973B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technologies, and particularly to an esophageal stent slippage test device. Background Art
[0002] Esophageal cancer can cause digestive tract stenosis and affect patients' eating. To enable patients to eat through the mouth, an esophageal stent is usually placed in the patient's esophagus. The esophageal stent is used to expand the patient's esophagus, so that food can pass through the esophagus.
[0003] The esophagus mainly consists of a circular muscle layer (inner layer) and a longitudinal muscle layer (outer layer). Through the contraction and peristalsis of these two muscles, food is forced into the stomach to achieve the propulsion of food into the stomach. The esophageal stent is long-term in the patient's esophagus and will be subjected to the circumferential contraction pressure and peristaltic action of the esophageal wall. Therefore, the esophageal stent needs to have sufficient radial support force to ensure that it can be in close contact with the esophageal wall after being implanted into the patient's body, and can be stably fixed in the esophagus while expanding the narrowed esophagus. If the stability of the esophageal stent in the esophagus is poor and the esophageal stent slips into the patient's stomach, not only does it need to remove the esophageal stent through surgery, but it will also bring great pain to the patient.
[0004] Currently, there are various anti-slippage esophageal stents on the market. To avoid the problem that these esophageal stents slip into the patient's stomach during the clinical process and bring pain to the patient, it is necessary to conduct in vitro simulation tests on these esophageal stents to detect the stability of the esophageal stents. This application provides an esophageal stent slippage test device. Summary of the Invention
[0005] To detect the stability of an esophageal stent, this application provides an esophageal stent slippage test device.
[0006] The esophageal stent slippage test device provided by this application adopts the following technical solutions:
[0007] The esophageal stent slippage test device includes a sealed chamber, a lifting device, a squeezing device, and an esophageal model tube. One end of the esophageal model tube is connected to the top of the sealed chamber, and the other end extends towards the bottom of the sealed chamber. The esophageal stent is arranged inside the esophageal model tube. The squeezing device is connected to the lifting device, and the lifting device is used to drive the squeezing device to reciprocate along the axis direction of the esophageal model tube. The squeezing device includes a first clamping block, a second clamping block, and a slippage driving mechanism. The first clamping block and the second clamping block are symmetrically arranged on both sides of the esophageal model tube. Both the first clamping block and the second clamping block are connected to the slippage driving mechanism. The slippage driving mechanism is used to drive the first clamping block and the second clamping block to move towards or away from the esophageal model tube synchronously. The surfaces of the first clamping block close to the esophageal model tube and the second clamping block close to the esophageal model tube are both sinusoidal surfaces.
[0008] By adopting the above technical solution, the sealed chamber provides a sealed environment for the esophageal model tube. After the first clamping block and the second clamping block move towards the esophageal model tube simultaneously, both the first clamping block and the second clamping block are in contact with the esophageal model tube and squeeze the esophageal model tube. The squeezing device applies a clamping force to the esophageal model tube in the radial direction of the esophageal model tube to simulate the contraction force received by the esophageal tube in the human body. The peristalsis of the esophageal tube in the human body has particularity. When the longitudinal muscle contracts only halfway during the peristalsis of the esophageal tube, the circular muscle begins to contract. When the circular muscle contraction is completed, the relaxation of the longitudinal muscle only proceeds halfway. The two contractions have a phase difference of about 90 degrees, presenting a wave-like movement. In order to more accurately simulate the peristalsis of the esophageal tube, the surfaces of the first clamping block close to the esophageal model tube and the second clamping block close to the esophageal model tube are both set as sinusoidal surfaces to simulate the wavelength and amplitude of the peristaltic wave presented during the peristalsis of the esophageal tube. The esophageal tube in the human body usually peristalsis along the axis direction of the esophageal tube. The lifting device drives the squeezing device to move along the axis direction of the esophageal model tube to simulate the peristalsis of the esophageal tube.
[0009] The esophageal stent is arranged on the inner wall of the esophageal model tube. Both the first clamping block and the second clamping block move towards the esophageal model tube. While applying a squeezing force to the esophageal model tube in the radial direction of the esophageal model tube, the lifting device drives the first clamping block and the second clamping block to move from the top of the sealed chamber towards the bottom of the sealed chamber along the axis direction of the esophageal model tube. The esophageal stent located inside the esophageal model tube is subjected to a squeezing force in the radial direction and a thrust force along the axis direction of the esophageal model tube, which better restores the contraction force and peristaltic force received by the esophageal stent when it is located in the esophageal tube, so as to detect the stability of the esophageal stent.
[0010] Optionally, the lifting device includes a linear motor, a connecting rod, and two supporting seats. The linear motor is connected to the bottom of the sealed chamber. The stator of the linear motor is arranged along the axis direction of the esophageal model tube. The mover of the linear motor reciprocates along the arrangement direction of the stator of the linear motor. The two supporting seats are symmetrically arranged on both sides of the esophageal model tube and are both connected to the mover of the linear motor. The two supporting seats are respectively connected to both ends of the connecting rod. The first clamping block and the second clamping block are both connected to the connecting rod. The sliding driving mechanism is connected to the supporting seat.
[0011] By adopting the above technical solution, the lifting device can drive the extrusion device to reciprocate along the axis direction of the esophageal model tube, and adjust the sliding speed of the extrusion device along the axial direction of the esophageal model tube by adjusting the lifting speed of the lifting device, so as to simulate the peristaltic speed of the esophageal tube under the human body environment.
[0012] Optionally, the first clamping block and the second clamping block are both slidably connected to the connecting rod. The sliding driving mechanism includes a driving motor and a bidirectional sliding lead screw. The driving motor is connected to the supporting seat. The bidirectional sliding lead screw is connected to the output shaft of the driving motor. One end of the bidirectional sliding lead screw provided with a left-handed thread penetrates into the first clamping block and is threadedly connected to the first clamping block. One end of the bidirectional sliding lead screw provided with a right-handed thread penetrates into the second clamping block and is threadedly connected to the second clamping block.
[0013] By adopting the above technical solution, the first clamping block and the second clamping block can move towards or away from the esophageal model tube simultaneously in the radial direction of the esophageal model tube.
[0014] Optionally, it further includes a temperature control device for controlling the temperature inside the sealed chamber. The temperature control device includes a heating plate and a blower. The heating plate is arranged on the inner wall of the sealed chamber. The blower is arranged on the heating surface of the heating plate.
[0015] By adopting the above technical solution, the temperature control device can control the temperature inside the sealed chamber, simulate the working temperature of the esophageal tube under the human body environment, make the esophageal model tube in the working temperature of the human esophageal tube, and can improve the accuracy of the test results of the esophageal stent sliding test equipment.
[0016] Optionally, it further includes a liquid delivery device. The liquid delivery device includes a liquid storage box, an infusion tube, and a liquid pump. The liquid storage box is arranged at the bottom of the sealed chamber. One end of the infusion tube is connected to the liquid storage box, and the other end is used for supplying liquid to the esophageal model tube. The liquid pump is arranged on the infusion tube.
[0017] By adopting the above technical solution, the solution in the liquid storage box is transported to the infusion tube, so that the esophageal model tube is in a wet state when the extrusion device slides along the axial direction of the esophageal model tube, and can simulate the lubricated state inside the esophageal tube.
[0018] Optionally, it further includes a fixing device. The fixing device includes a fixing rod and a fixing sleeve. The fixing sleeve is connected to the top of the sealing chamber. One end of the fixing sleeve away from the top of the sealing chamber is provided with a connection hole. The fixing rod is arranged in the fixing sleeve and passes through the connection hole. The esophageal model tube is connected to the fixing rod.
[0019] By adopting the above technical solution, the connection between the esophageal model tube and the top of the sealing cavity is realized, and it is suspended at the top of the sealing chamber, which better simulates the real state of the esophageal tube in the human body.
[0020] Optionally, the fixing rod is movably connected to the fixing sleeve, and the diameter of the fixing rod is smaller than the diameter of the connection hole.
[0021] By adopting the above technical solution, the fixing rod is movably connected, and the diameter of the fixing rod is smaller than the diameter of the connection hole. When the extrusion device moves along the axial direction of the esophageal model tube, the fixing rod will not limit the shaking of the esophageal model tube in the radial direction and can play a certain buffering role.
[0022] Optionally, the esophageal model tube is an elastic member.
[0023] By adopting the above technical solution, the esophageal tube of the human body has good elasticity as a food circulation channel. Using an elastic material to make the esophageal model tube can better restore the esophageal tube and improve the accuracy of the esophageal stent slip test equipment for detecting esophageal stents.
[0024] In summary, the present application includes at least one of the following beneficial technical effects:
[0025] 1. By arranging the esophageal stent in the esophageal simulation tube, setting an extrusion device and a lifting device to simulate the contraction and peristalsis of the esophageal tube, restoring the force condition of the esophageal stent in the esophageal tube, and simulating and testing the stability of the esophageal stent.
[0026] 2. By setting the surfaces of the first clamping block and the second clamping block close to the esophageal model tube as sine curves to accurately simulate the peristalsis of the esophageal tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 is a schematic structure of an esophageal stent slip test device Figure 1 .
[0028] Figure 2It is a schematic structural diagram of a fixing device of an esophageal stent slip test device.
[0029] Figure 3 It is a schematic structure of an esophageal stent slip test device Figure 2 .
[0030] Figure 4 It is a schematic structural diagram of a device in the sealing chamber of an esophageal stent slip test device.
[0031] Figure 5 It is a schematic structural diagram of the first clamping block and the second clamping block in an esophageal stent slip test device.
[0032] Explanation of reference numerals: 1, sealing chamber; 11, sealing chamber door; 2, fixing device; 21, fixing sleeve; 22, fixing rod; 23, connecting hole; 3, lifting device; 31, linear motor; 32, connecting rod; 33, support seat; 4, extrusion device; 41, first clamping block; 42, second clamping block; 43, slip driving mechanism; 431, driving motor; 432, bidirectional slip screw rod; 44, sine curve surface; 5, esophageal model tube; 6, temperature control device; 61, heating plate; 62, fan; 7, liquid delivery device; 71, liquid storage box; 72, infusion tube; 73, liquid pump. Detailed implementation manners
[0033] The following further describes the present application in detail with reference to the accompanying drawings.
[0034] An embodiment of the present application discloses an esophageal stent slip test device. Refer to Figure 1 , this esophageal stent slip test device includes a sealing chamber 1, a fixing device 2, a lifting device 3, an extrusion device 4 and an esophageal model tube 5. The sealing chamber 1 provides a sealed working environment for the esophageal model tube 5, the fixing device 2 is used to fix the esophageal model tube 5 in the sealing chamber 1, the extrusion device 4 is used to extrude the esophageal model tube 5 to simulate the contraction state of the esophagus tube, and the lifting device 3 is used to drive the extrusion device 4 to move along the axis of the esophageal model tube 5.
[0035] The sealing chamber 1 provides a sealed working environment for the esophageal model tube 5. In different embodiments, the sealing chamber 1 can have different shapes, as long as it can form a space for accommodating the esophageal model tube 5 and can provide a sealed working environment for the esophageal model tube 5. As an example, the sealing chamber 1 is a cylindrical structure and is provided with a sealing chamber door 11. The sealing chamber door 11 is convenient for experimenters to replace the esophageal stent.
[0036] One end of the esophageal model tube 5 is connected to the top of the sealed chamber 1, and the other end extends towards the bottom of the sealed chamber 1. The esophageal stent is arranged inside the esophageal model tube 5. In different embodiments, the esophageal model tube 5 can be made of different materials, as long as it has sufficient toughness and elasticity to restore the toughness and elasticity of the esophageal tube. It can be made of rubber material or a fabric with better elasticity. It should be noted that the elastic material forming the esophageal model tube 5 has good elasticity in the radial direction of the esophageal model tube 5, while having very little elasticity in the axial direction of the esophageal model tube 5, so as to be able to simulate the swallowing characteristics of the human esophageal tube when subjected to extrusion force and thrust subsequently, that is, the radial direction is repeatedly compressed and expanded during swallowing while there is no elongation in the axial direction.
[0037] Referring Figure 1 and Figure 2 , in different embodiments, the esophageal model tube 5 can be connected to the sealed chamber 1 in different ways. By way of example, the esophageal model tube 5 is connected to the top of the sealed chamber 1 through the fixing device 2. Specifically but not limitedly, a structure of the fixing device 2 is proposed. The fixing device 2 includes a fixing rod 22 and a fixing sleeve 21. The fixing sleeve 21 is connected to the top of the sealed chamber 1. A connection hole 23 is provided at one end of the fixing sleeve 21 away from the top of the sealed chamber 1. The fixing rod 22 is arranged in the fixing sleeve 21, passes through the connection hole 23, and penetrates into the esophageal model tube 5. It should be noted that the fixing rod 22 is movably connected to the fixing sleeve 21, and the diameter of the fixing rod 22 is smaller than the diameter of the connection hole 23. With such a setting, when the extrusion device 4 moves along the axial direction of the esophageal model tube 5, the fixing rod 22 not only plays a role in fixing the esophageal model tube 5, but also plays a buffering role on the esophageal model tube 5.
[0038] The esophageal tube is located inside the human body, and the human body has a relatively high temperature. In order to better simulate the working environment of the esophageal tube and improve the accuracy of the test results of the esophageal stent slip test equipment. A temperature control device 6 is arranged inside the sealed chamber 1. In different embodiments, the temperature control device 6 can have different structures, as long as it can control the temperature inside the sealed chamber 1. By way of example, the temperature control device 6 includes a heating plate 61 and a blower 62. The heating plate 61 is arranged on the inner wall of the sealed chamber 1, and the blower 62 is arranged on the heating surface of the heating plate 61.
[0039] The wall of the esophagus tube in the human body is in a moist state during peristalsis. To further improve the accuracy of the test results of the esophageal stent slippage test device, a liquid delivery device 7 is provided in the sealed chamber 1. In different embodiments, the liquid delivery device 7 can have different structures, as long as it can make the esophageal model tube 5 in a moist state when the extrusion device 4 extrudes the esophageal model tube 5 and moves in the axial direction of the esophageal model tube 5. As an example, the liquid delivery device 7 includes a liquid storage box 71, an infusion tube 72, and a liquid pump 73. The liquid storage box 71 is arranged at the bottom of the sealed chamber 1. One end of the infusion tube 72 is connected to the liquid storage box 71, and the other end is connected to the first clamping block 41. The liquid pump 73 is arranged on the infusion tube 72. The liquid pump 73 can pump the solution in the liquid storage box 71 into the infusion tube 72, and the infusion tube 72 can transport the solution from the liquid storage box 71 to the surface of the first clamping block 41 for fitting with the esophageal model tube 5. When the first clamping block 41 fits with the esophageal model tube 5, the liquid can infiltrate onto the esophageal model tube 5 to achieve liquid supply to the esophageal model tube 5 by the infusion tube 72. Specifically, different liquids can be stored in the liquid storage box 71. When an oil-based liquid is stored in the liquid storage box 71, the esophageal model tube 5 is infiltrated with the oil-based liquid, and the stability of the esophageal stent in a lubricated state can be detected. When digestive juice or saliva is stored in the liquid storage box 71, the esophageal model tube 5 is infiltrated with the digestive juice or saliva, and the working environment of the human esophagus tube can be simulated to detect the stability of the esophageal stent in the working environment of the human esophagus tube.
[0040] Refer to Figure 1 and Figure 3 , the extrusion device 4 is used to extrude the esophageal model tube 5 to simulate the contraction state of the esophagus tube. Specifically but not limitedly, an extrusion device 4 is provided. The extrusion device 4 includes a first clamping block 41, a second clamping block 42, and a sliding drive mechanism 43. The first clamping block 41 and the second clamping block 42 are symmetrically arranged on both sides of the esophageal model tube 5. Both the first clamping block 41 and the second clamping block 42 are connected to the sliding drive mechanism 43, and the sliding drive mechanism 43 is used to drive the first clamping block 41 and the second clamping block 42 to move synchronously towards or away from the esophageal model tube 5.
[0041] Refer to Figure 3 and Figure 4, in different embodiments, the sliding drive mechanism 43 can have different structures, as long as it can drive the first clamping block 41 and the second clamping block 42 to move synchronously towards or away from the esophagus model tube 5. As an example, the sliding drive mechanism 43 includes a drive motor 431 and a bidirectional sliding lead screw 432. The drive motor 431 is connected to the lifting device 3, and the bidirectional sliding lead screw 432 is connected to the output shaft of the drive motor 431. One end of the bidirectional sliding lead screw 432 provided with a left-handed thread penetrates into the first clamping block 41 and is threadedly connected to the first clamping block 41, and one end of the bidirectional sliding lead screw 432 provided with a right-handed thread penetrates into the second clamping block 42 and is threadedly connected to the second clamping block 42. When the bidirectional sliding lead screw 432 rotates, the first clamping block 41 and the second clamping block 42 can move towards or away from the esophagus model tube 5 simultaneously in the radial direction of the esophagus model tube 5, simulating the contraction of the esophagus tube, so as to apply a radial squeezing force from the esophagus model tube 5 to the esophagus stent arranged in the esophagus model tube 5.
[0042] The lifting device 3 is used to drive the squeezing device 4 to move along the axial direction of the esophagus model tube 5. Specifically but not limitedly, a lifting device 3 is proposed. The lifting device 3 includes a linear motor 31, a connecting rod 32 and two support seats 33. The linear motor 31 is connected to the bottom of the sealed cabin 1. The stator of the linear motor 31 is arranged along the axial direction of the esophagus model tube 5, and the mover of the linear motor 31 reciprocates along the arrangement direction of the stator of the linear motor 31. The two support seats 33 are symmetrically arranged on both sides of the esophagus model tube 5 and are both connected to the mover of the linear motor 31. The two support seats 33 are respectively connected to both ends of the connecting rod 32. The first clamping block 41 and the second clamping block 42 are both slidably connected to the connecting rod 32, and the drive motor 431 is connected to the support seat 33. The lifting device 3 can drive the squeezing device 4 to move along the axial direction of the esophagus model tube 5, simulating the peristalsis of the esophagus tube, so as to apply an axial thrust from the esophagus model tube 5 to the esophagus stent arranged in the esophagus model tube 5.
[0043] Refer to Figure 5 , it should be noted that the peristalsis of the human esophagus tube has particularity. When the esophagus tube peristalsis, when the longitudinal muscle contraction is only half completed, the circular muscle begins to contract, and when the circular muscle contraction is completed, the longitudinal muscle relaxation only proceeds half. The two contractions have a phase difference of about 90 degrees, presenting a wavy motion. In order to more accurately simulate the peristalsis of the esophagus tube, the surfaces of the first clamping block 41 close to the esophagus model tube 5 and the second clamping block 42 close to the esophagus model tube 5 are both set as sine surfaces 44 to simulate the wavelength and amplitude of the peristaltic wave presented when the esophagus tube peristalsis.
[0044] The implementation principle of the embodiment of this application is as follows: Open the sealed chamber 1, and place the esophageal stent on the inner wall of the esophageal model tube 5. Close the sealed chamber 1, and start the temperature control device 6. The temperature control device 6 maintains the temperature in the sealed chamber 1 between 36.2° and 37.2°. After the temperature in the sealed chamber 1 is maintained between 36.2° and 37.2°, adjust the lifting speed of the lifting device to simulate the peristaltic speed. Start the extrusion device 4 and the lifting device 3. Both the first clamping block 41 and the second clamping block 42 move towards the esophageal model tube 5. While applying an extrusion force to the esophageal model tube 5 in the radial direction of the esophageal model tube 5, the lifting device 3 drives the first clamping block 41 and the second clamping block 42 to move from the top of the sealed chamber 1 towards the bottom of the sealed chamber 1 along the axis of the esophageal model tube 5. At this time, the infusion tube 72 provides a solution for the esophageal model tube 5 that fits with the first clamping block 41 and the second clamping block 42. The esophageal stent located in the esophageal model tube 5 can simultaneously receive the pressure in the radial direction of the esophageal model tube 5 and the thrust in the axial direction of the esophageal model tube 5, better restoring the extrusion force and peristaltic force received by the esophageal stent when it is located in the esophagus tube to test the stability of the esophageal stent. When the extrusion device 4 moves to the bottom of the sealed chamber 1, the first clamping block 41 and the second clamping block 42 simultaneously move away from the esophageal model tube 5, and the lifting device 3 drives the extrusion device 4 towards the top of the sealed chamber 1.
[0045] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. An esophageal stent slippage test device, characterized in that: It includes a sealed chamber (1), a fixing device (2), a lifting device (3), a squeezing device (4), an esophageal model tube (5) and a liquid delivery device (7); one end of the esophageal model tube (5) is connected to the top of the sealed chamber (1), and the other end extends towards the bottom of the sealed chamber (1). An esophageal stent is arranged inside the esophageal model tube (5). The squeezing device (4) is connected to the lifting device (3). The lifting device (3) is used to drive the squeezing device (4) to reciprocate along the axis direction of the esophageal model tube (5). The squeezing device (4) includes a first clamping block (41), a second clamping block (42) and a sliding driving mechanism (43). The first clamping block (41) and the second clamping block (42) are symmetrically arranged on both sides of the esophageal model tube (5). Both the first clamping block (41) and the second clamping block (42) are connected to the sliding driving mechanism (43). The sliding driving mechanism (43) is used to drive the first clamping block (41) and the second clamping block (42) to move towards or away from the esophageal model tube (5) synchronously. The surfaces of the first clamping block (41) close to the esophageal model tube (5) and the second clamping block (42) close to the esophageal model tube (5) are both sinusoidal surfaces (44). The fixing device (2) includes a fixing rod (22) and a fixing sleeve (21). The fixing sleeve (21) is connected to the top of the sealed chamber (1). A connection hole (23) is opened at one end of the fixing sleeve (21) far from the top of the sealed chamber (1). The fixing rod (22) is arranged in the fixing sleeve (21) and passes through the connection hole (23). The esophageal model tube (5) is connected to the fixing rod (22). The lifting device (3) includes a linear motor (31), a connecting rod (32) and two support seats (33). The linear motor (31) is connected to the bottom of the sealed chamber (1). The stator of the linear motor (31) is arranged along the axis direction of the esophageal model tube (5). The mover of the linear motor (31) reciprocates along the setting direction of the stator of the linear motor (31). The two support seats (33) are symmetrically arranged on both sides of the esophageal model tube (5) and are both connected to the mover of the linear motor (31). The two support seats (33) are respectively connected to both ends of the connecting rod (32). Both the first clamping block (41) and the second clamping block (42) are connected to the connecting rod (32). The sliding driving mechanism (43) is connected to the support seat (33). The liquid delivery device (7) includes a liquid storage box (71), an infusion tube (72) and a liquid pump (73). The liquid storage box (71) is arranged at the bottom of the sealed chamber (1). One end of the infusion tube (72) is connected to the liquid storage box (71), and the other end is used to supply liquid to the esophageal model tube (5). The liquid pump (73) is arranged on the infusion tube (72).
2. The esophageal stent sliding test device according to claim 1, characterized in that: The first clamping block (41) and the second clamping block (42) are both slidably connected to the connecting rod (32). The sliding drive mechanism (43) includes a drive motor (431) and a bidirectional sliding lead screw (432). The drive motor (431) is connected to the support base (33). The bidirectional sliding lead screw (432) is connected to the output shaft of the drive motor (431). One end of the bidirectional sliding lead screw (432) provided with a left-handed thread penetrates into the first clamping block (41) and is threadedly connected to the first clamping block (41). One end of the bidirectional sliding lead screw (432) provided with a right-handed thread penetrates into the second clamping block (42) and is threadedly connected to the second clamping block (42).
3. The esophageal stent sliding test device according to claim 1, characterized in that: It further includes a temperature control device (6). The temperature control device (6) is used to control the temperature inside the sealed cabin (1). The temperature control device (6) includes a heating plate (61) and a blower (62). The heating plate (61) is arranged on the inner wall of the sealed cabin (1). The blower (62) is arranged on the heat generating surface of the heating plate (61).
4. The esophageal stent slippage test device according to claim 1, characterized in that: The fixed rod (22) is movably connected to the fixed sleeve (21). The diameter of the fixed rod (22) is smaller than the diameter of the connection hole (23).
5. The esophageal stent sliding test device according to claim 1, characterized in that: The esophageal model tube (5) is an elastic member.
Citation Information
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Bionic human esophagus and gastric digestion system
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Novel portable liquid diet feeder for intensive care unit nursing
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