Auxiliary device for preparing rabbit hemorrhagic shock model
By using an auxiliary device for carotid artery cannulation in rabbits, simultaneous bloodletting and blood pressure monitoring can be achieved, solving the problems of high operational difficulty and low success rate in existing technologies, and improving the success rate and accuracy of experiments.
Patent Information
- Application Number
- CN202422655413.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In existing technologies, the preparation of rabbit hemorrhagic shock models via femoral artery cannulation is difficult, has a low success rate, and is time-consuming.
An auxiliary device for carotid artery cannulation in rabbits was used, which connected the blood storage bottle and the transducer through a three-way tube to achieve simultaneous bloodletting and blood pressure monitoring, reducing the difficulty of additional femoral artery cannulation. The height of the blood storage bottle and the transducer was adjusted using an iron stand to ensure that the blood pressure was stable at 40 mmHg.
This improved the success rate and accuracy of preparing rabbit hemorrhagic shock models, allowed for sensitive control of blood loss, prevented experimental failures due to operational errors, and ensured the accuracy of experimental data.
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Figure CN223586073U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of medical teaching, in particular to an auxiliary device for preparing a hemorrhagic shock model of a rabbit. BACKGROUND
[0002] According to the microcirculation theory, shock is defined as a systemic pathological process caused by a decrease in effective circulating blood volume, microcirculation perfusion disorder, and insufficient perfusion of important life organs and tissues, thereby causing cell function disorder. Whether shock occurs depends on the amount and speed of blood loss. When the blood volume is sharply reduced by more than 20% of the total blood volume, acute circulatory disorder and insufficient tissue effective blood perfusion, i.e. shock, are easily caused. According to the changes of microcirculation in the shock process, the shock is divided into three stages: early shock (microcirculation ischemia stage), shock stage (microcirculation congestion stage), and late shock (microcirculation failure stage). However, according to the different blood loss degrees and speeds, the duration of each stage and the pathophysiological changes are different. There are many causes of shock. In the experiment, the carotid artery of a rabbit is bled to directly reduce the effective circulating blood volume and reproduce a hypovolemic shock model. After bleeding for a certain period of time, the circulating blood volume is insufficient, the venous return heart blood volume is insufficient, the blood pressure is reduced, the baroreceptor reflex is caused, the sympathetic nervous system is excited, the peripheral blood vessels are contracted, the tissue perfusion volume is sharply reduced, and hemorrhagic shock is caused. The animal model of hemorrhagic shock prepared by medical students reduces the arterial blood pressure of the animal to 40mmHg and maintains for 30min to reach the late shock stage (microcirculation failure stage) to observe and record the changes of the physiological and biochemical indexes of the animal. Then, the shock can be rescued by infusion, blood volume is supplemented, different vasoactive drugs are used, the curative effects are compared, and the roles of the drugs in the shock treatment are analyzed. Therefore, how to simply and reliably reduce the arterial blood pressure of the animal to 40mmHg by arterial bleeding and maintain for 30min to enter the late shock stage (microcirculation failure stage) is the most critical problem.
[0003] In the prior art, the following method is usually adopted to achieve the above object, i.e. a method for recording arterial blood pressure by connecting a pressure transducer to a carotid artery cannula and bleeding through a femoral artery cannula. The method can record the change of arterial blood pressure by synchronously bleeding through the femoral artery and connecting the carotid artery cannula. However, the femoral artery is difficult to position due to its deep position, and the cannulation of the femoral artery is difficult due to its thinness, which increases the operation difficulty of students and consumes a long time, and the success rate of the shock model preparation is low. CONTENT OF THE UTILITY MODEL
[0004] In view of the above problems, the application provides an auxiliary device for preparing a rabbit hemorrhagic shock model, which can monitor the blood pressure of the rabbit during bloodletting, thereby ensuring that the blood pressure of the rabbit is maintained at 40 mmHg after bloodletting, and the process only needs to cannulate the carotid artery of the rabbit, without the need to cannulate the femoral artery of the rabbit, thereby greatly reducing the cannulation difficulty and effectively improving the success rate of preparation of the shock model.
[0005] According to an aspect of the application, an auxiliary device for preparing a rabbit hemorrhagic shock model is provided. The auxiliary device for preparing a rabbit hemorrhagic shock model comprises an operating table, an iron stand, and a signal acquisition device. An arterial cannula is arranged at the operating table. The end of the arterial cannula is connected with a first rubber tube and a second rubber tube through a three-way tube. The end of the first rubber tube is connected with a blood storage bottle. The end of the second rubber tube is connected with a transducer. The iron stand comprises a base and a vertical rod fixed vertically on the top of the base. The central axis of the vertical rod is perpendicular to the plane on which the top of the base is located. The blood storage bottle is connected to the vertical rod through a first fixing assembly. The transducer is connected to the vertical rod through a second fixing assembly. A hemostatic clamp is arranged near the blood storage bottle of the first rubber tube. The transducer is connected to the signal acquisition device.
[0006] In some embodiments, the material of the blood storage bottle is a light-transmitting material. A capacity scale mark is arranged on the outer wall of the blood storage bottle.
[0007] In some embodiments, the top of the base is provided with a level bubble. Adjustable supporting feet for adjusting the level of the base are arranged at the four corners of the bottom of the base.
[0008] In some embodiments, the level bubble is two, and the two level bubbles are arranged perpendicularly to each other.
[0009] In some embodiments, the adjustable supporting feet comprise a first limiting rod member fixed to the bottom of the base. A second limiting rod member is coaxially arranged below the first limiting rod member. A threaded cylinder is jointly sleeved between the first limiting rod member and the second limiting rod member. The outer walls of the first limiting rod member and the second limiting rod member are both provided with threads, and the threads have opposite directions.
[0010] In some embodiments, the bottom end of the second limiting rod member is connected with a wear-resistant sheet. The bottom of the wear-resistant sheet is provided with anti-slip protrusions.
[0011] In some embodiments, the vertical rod is provided with a length scale for identifying the length.
[0012] In some embodiments, the second fixing assembly comprises a sleeve ring sleeved on the vertical rod, a U-shaped clamp for clamping the transducer is arranged on one side of the outer wall of the sleeve ring, a positioning threaded rod is horizontally screwed on the side of the sleeve ring away from the U-shaped clamp, and the end of the positioning threaded rod abuts against the vertical rod.
[0013] In some embodiments, an auxiliary positioning rod is vertically arranged on the top of the sleeve ring, and the length of the auxiliary positioning rod satisfies that the height from the center point of the U-shaped clamp to the top point of the auxiliary positioning rod is 55 cm.
[0014] In some embodiments, a laser emission cylinder is horizontally arranged on the second fixing assembly, and the emission end of the laser emission cylinder is directed to the operation table.
[0015] The beneficial effects in the present application are as follows: in the present application, the iron stand is arranged, the arterial cannula is connected to the transducer and the blood storage bottle through the three-way valve and the first and second rubber tubes, so that the arterial cannula of the neck is performed only once, the blood of the rabbit is simultaneously discharged, and the blood pressure of the rabbit is monitored during the blood discharge, the operation difficulty of the additional femoral arterial cannula is reduced, and the experimental success rate and accuracy are improved. In the embodiments of the present application, the vertical rod, the first fixing assembly and the second fixing assembly are arranged, the height of the blood storage bottle and the transducer is adjusted by adjusting the height of the first fixing assembly and the second fixing assembly, so that the heart position of the rabbit and the height level of the transducer are adjusted, so as to ensure the experimental accuracy. On the other hand, the blood pressure of the rabbit can be maintained at 40 mmHg by adjusting the height difference between the liquid level in the blood storage bottle and the heart position of the rabbit, that is, 55 cm, so that the blood pressure of the rabbit can be stabilized at the required value in the experiment, the blood discharge amount can be controlled sensitively and effectively, even if the blood discharge amount is excessive in a short time due to improper operation, the blood storage bottle can be lowered to make the blood in the blood storage bottle flow back to the artery of the rabbit, so that the experiment failure caused by excessive blood discharge due to operation failure can be prevented, and the number displayed by the signal acquisition device connected to the transducer can be compared with the liquid level in the blood storage bottle in the experiment in a bidirectional manner, so as to further ensure the accuracy of the experimental data.
[0016] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS
[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art, upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not intended to limit the scope of the application. Furthermore, the drawings are not necessarily drawn to scale. In the drawings:
[0018] Figure 1 The overall structure schematic diagram of the auxiliary device for preparing a rabbit model of hemorrhagic shock is provided in the embodiments of the application;
[0019] Figure 2 The auxiliary device for preparing a rabbit model of hemorrhagic shock is provided in the embodiments of the application; Figure 1 The enlarged view at A;
[0020] Figure 3 The overall structure schematic diagram of the auxiliary device for preparing a rabbit model of hemorrhagic shock is provided in the embodiments of the application;
[0021] Figure 4 The overall structure schematic diagram of the auxiliary device for preparing a rabbit model of hemorrhagic shock is provided in the embodiments of the application;
[0022] The drawings in the detailed description of the embodiments are as follows:
[0023] The auxiliary device 100 for preparing a rabbit model of hemorrhagic shock, an operating table 110, an iron stand 120, a base 121, a bubble level 121a, a vertical rod 122, a length identification scale 122a, a first fixing assembly 123, a second fixing assembly 124, a collar 124a, a U-shaped clamp 124b, a positioning threaded rod 124c, an adjustable support foot 125, a first limiting rod 125a, a second limiting rod 125b, a threaded cylinder 125c, a wear-resistant sheet 125d, an auxiliary positioning rod 126, a laser emitting cylinder 127, a signal acquisition device 130, an arterial cannula 140, a tee 141, a first rubber tube 142, a hemostatic clamp 142a, a second rubber tube 143, a blood storage bottle 150, a capacity scale 151, and a transducer 160. DETAILED DESCRIPTION
[0024] The embodiments of the technical scheme of the application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the application, and therefore only serve as examples, and cannot limit the protection scope of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which the application belongs; the terms used herein are only for the purpose of describing the specific embodiments and are not intended to limit the application; the terms “include” and “have” and any variations thereof in the specification and claims of the application and the above description of drawings are intended to cover non-exclusive inclusion.
[0025] In particular, reference is made to Figures 1 to 4, Figure 1 The overall structure schematic diagram of the auxiliary device for preparing the rabbit hemorrhagic shock model provided by the embodiment of the application, Figure 2 Figure 1 The enlarged view at A, Figure 3 The overall structure schematic diagram of the auxiliary device for preparing the rabbit hemorrhagic shock model provided by the embodiment of the application, Figure 4 The side cross-sectional structure schematic diagram at the second fixing assembly provided by the embodiment of the application. The auxiliary device 100 for preparing the rabbit hemorrhagic shock model comprises an operation table 110, an iron stand 120 and a signal acquisition device 130. The operation table 110 herein is an experimental platform for students to perform the rabbit bloodletting treatment, which can be in various forms as long as the use requirements are met, and will not be limited herein. The iron stand 120 is used to fix the transducer 160 and the blood storage bottle 150, and is usually arranged at one side of the operation table 110. The signal acquisition device 130 is a prior art, and its model can be BL420 biological signal acquisition and analysis system. An arterial cannula 140 is arranged at the operation table 110, and is used to be inserted into the carotid artery of the rabbit. It should be noted that the carotid artery of the rabbit is easier to be cannulated than the femoral artery, and the cannulation difficulty is lower, so the cannulation is performed at the carotid artery of the rabbit herein. It can be understood that the arterial cannula 140 can also be inserted into the femoral artery of the rabbit under the condition that the experimental requirements are met, and the selection of the carotid cannulation or the femoral cannulation has no influence on the experimental effect. The end of the arterial cannula 140 is communicated with a first rubber tube 142 and a second rubber tube 143 through a three-way tube 141 respectively. The end of the first rubber tube 142 is communicated with the blood storage bottle 150, and the end of the second rubber tube 143 is communicated with the transducer 160. The transducer 160 is a prior art, and is used to measure the blood pressure of the rabbit. The iron stand 120 comprises a base 121 and a vertical rod 122 vertically fixed at the top of the base 121. The central axis of the vertical rod 122 is perpendicular to the plane where the top plane of the base 121 is located. The blood storage bottle 150 is connected to the vertical rod 122 through a first fixing assembly 123, and the transducer 160 is connected to the vertical rod 122 through a second fixing assembly 124. A hemostatic clamp 142a is arranged at the position close to the blood storage bottle 150 of the first rubber tube 142, and is used to clamp the first rubber tube 142. When the first rubber tube 142 is clamped, the blood of the rabbit will not flow into the blood storage bottle 150. The transducer 160 is connected to the signal acquisition device 130.
[0026] Noun analysis:
[0027] Shock: refers to a serious circulatory failure state caused by the rapid reduction of the effective circulating blood volume of the whole body or the abnormal distribution of blood flow, resulting in insufficient perfusion of tissues and organs.
[0028] Hemorrhagic shock: A clinical syndrome characterized by circulatory disturbances, resulting from acute blood loss leading to a significant reduction in circulating blood volume, cardiac output, and effective circulating blood volume. Microcirculatory disturbances cause insufficient blood perfusion to vital organs and tissues, resulting in a series of clinical symptoms and signs.
[0029] Circulating blood volume refers to the total amount of blood circulating in the vascular system, including arterial blood, venous blood, and blood in the microcirculation. A decrease in circulating blood volume is one of the models of hemorrhagic shock.
[0030] Insufficient oxygen and blood supply: This refers to a situation where tissues and organs do not receive enough oxygen and nutrients to meet their normal metabolic needs. In hemorrhagic shock models, reduced blood flow leads to insufficient oxygen and blood supply to tissues and organs, resulting in organ dysfunction and damage.
[0031] Circulatory failure: Changes in cardiac pumping function and peripheral vascular resistance lead to impaired blood flow, resulting in impaired perfusion of tissues and organs. Hemorrhagic shock is a state of circulatory failure.
[0032] Fluid resuscitation refers to a treatment method in hemorrhagic shock models that replenishes circulating blood volume, increases blood volume and circulating blood flow, and corrects insufficient oxygen and blood supply and circulatory failure by infusing fluids such as saline, plasma, and red blood cell suspension.
[0033] During the experiment, the rabbit was placed on the adjustment platform 110. The rabbit underwent systemic heparinization via the ear vein, followed by cannulation of the common carotid artery 140 and the external jugular vein. The external jugular vein cannulation was used to monitor central venous pressure; this is a separate device, and details can be found in existing technology, so they will not be elaborated here. The second fixing component 124 was adjusted so that the transducer 160 was at the same height as the rabbit's heart. Before bloodletting, the hemostatic clamp 142a at the blood collection bottle 150 was closed to monitor normal blood pressure. When bloodletting began, the hemostatic clamp 142a was simply opened, allowing the rabbit's blood to flow through the arterial cannula 140 into the first tubing 142 and ultimately into the blood collection bottle 150. Blood pressure could be monitored simultaneously during this bloodletting process. During the bloodletting process, the speed and amount of bloodletting can be controlled by adjusting the height of the blood collection bottle 150. Towards the end of the bloodletting process, the height of the blood collection bottle 150 is controlled so that the height difference between the liquid level in the bottle and the transducer 160 is 55cm and remains stable (in essence, since the transducer 160 is at the same height as the rabbit's heart, this indirectly controls the height difference between the rabbit's heart and the liquid level in the blood collection bottle 150 to be 55cm). Since blood density is similar to water, calculations show that 1 mmHg = 1.36 cmH2O, and 40 mmHg = 55 cmH2O. Therefore, when the height difference between the liquid level in the blood collection bottle 150 and the rabbit's heart is 55cm and remains stable, the rabbit's blood pressure will reach 40 mmHg.
[0034] In summary, in the embodiment of the present application, by setting the iron stand 120, the arterial cannula 140 is connected to the transducer 160 and the blood storage bottle 150 through the three-way valve and the first rubber tube 142 and the second rubber tube 143 respectively, so that the present application can simultaneously realize bloodletting and blood pressure monitoring of the rabbit during bloodletting by performing arterial cannulation 140 only once, reducing the operation difficulty of additional femoral arterial cannulation 140, and improving the experimental success rate and accuracy. In the embodiment of the present application, by setting the vertical rod 122, the first fixing assembly 123 and the second fixing assembly 124, the height of the blood storage bottle 150 and the transducer 160 can be adjusted by adjusting the height of the first fixing assembly 123 and the second fixing assembly 124, so that the rabbit heart position and the height level of the transducer 160 are adjusted to ensure the experimental accuracy. On the other hand, by adjusting the height difference between the liquid level in the blood storage bottle 150 and the rabbit heart position to 55 cm, the blood pressure of the rabbit can be maintained at 40 mmHg, the blood pressure of the rabbit can be stabilized at the required value of the experiment, and the blood loss can be controlled sensitively and effectively. Even if the operation is improper and the blood loss exceeds the standard in a short time, the blood in the blood storage bottle 150 can flow back to the rabbit's artery by reducing the height of the blood storage bottle 150, so as to prevent the experiment from failing due to excessive blood loss caused by operation failure. And by comparing the reading of the signal acquisition device 130 connected to the transducer 160 with the liquid level in the blood storage bottle 150 during the experiment, the accuracy of the experimental data can be further ensured.
[0035] In some embodiments, the material of the blood storage bottle 150 is a light-transmitting material, and the outer wall of the blood storage bottle 150 is provided with a capacity scale mark 151. In the embodiment of the present application, the total blood loss of the rabbit can be obtained according to the capacity scale mark 151.
[0036] In some embodiments, the top of the base 121 is provided with a level bubble 121a, and the level bubble 121a can be two, which are arranged perpendicular to each other. The bottom of the base 121 is provided with adjustable supporting feet 125 for adjusting the level of the base 121. In the embodiment of the present application, the level bubble 121a can be used to observe whether the base 121 is in a horizontal state, so as to ensure that the subsequent height measurement value is within the accurate range and improve the experimental accuracy.
[0037] In some embodiments, the adjustable support leg 125 comprises a first limiting rod 125a fixed at the bottom of the base 121, a second limiting rod 125b coaxially arranged below the first limiting rod 125a, and a threaded cylinder 125c jointly sleeved outside the first limiting rod 125a and the second limiting rod 125b. The outer walls of the first limiting rod 125a and the second limiting rod 125b are provided with threads in opposite directions. In the embodiments of the present application, when it is determined that the base 121 is horizontally inclined by observing the bubble level 121a, the adjustable support leg 125 can be raised or lowered by rotating the corresponding adjustable support leg 125, so as to maintain the horizontal state of the base 121. Specifically, the height of the adjustable support leg 125 can be adjusted by rotating the threaded cylinder 125c. After the threaded cylinder 125c is rotated, the first limiting rod and the second limiting rod can be moved away from or close to each other according to the direction of rotation of the threaded cylinder 125c.
[0038] In some embodiments, the bottom end of the second limiting rod 125b is connected with a wear-resistant sheet 125d, and the bottom of the wear-resistant sheet 125d is provided with anti-skid protrusions. In the embodiments of the present application, the bottom of the adjustable support leg 125 can be stably placed in the experimental environment by the above arrangement, so as to avoid the inclination phenomenon again due to sliding and the like.
[0039] In some embodiments, the vertical rod 122 is provided with a length identification scale 122a for identifying the length. In the embodiments of the present application, the length identification scale 122a is arranged to facilitate determining whether the height of the liquid surface in the blood storage bottle 150 is maintained within a suitable and reasonable range according to the length identification scale 122a on the vertical rod 122.
[0040] In some embodiments, the second fixing assembly 124 comprises a sleeve ring 124a sleeved on the vertical rod 122, a U-shaped clamp 124b arranged on one side of the outer wall of the sleeve ring 124a for clamping the transducer 160, and a positioning threaded rod 124c horizontally screwed on the side of the sleeve ring 124a away from the U-shaped clamp 124b, the end of the positioning threaded rod 124c abutting against the vertical rod 122. The embodiments of the present application provide a specific arrangement of the second fixing assembly 124. During operation, the positioning threaded rod can be rotated to move away from the vertical rod 122. At this time, the height of the sleeve ring 124a can be changed by sliding the sleeve ring 124a on the vertical rod 122, so as to adjust the transducer 160 clamped by the U-shaped clamp 124b to be at the same height as the rabbit heart. Subsequently, the positioning threaded rod is fixed by rotating the positioning threaded rod to make the free end of the positioning threaded rod abut against the vertical rod 122.
[0041] In some embodiments, the top of the sleeve 124a is vertically provided with an auxiliary positioning rod 126, the length of the auxiliary positioning rod 126 satisfies that the height from the center point of the U-shaped clamp 124b to the top point of the auxiliary positioning rod 126 is 55 cm. In the embodiments of the application, by setting the auxiliary positioning rod 126, the experimenter adjusts the height of the liquid level in the blood storage bottle 150 to be consistent with the height of the top end of the auxiliary positioning rod 126 by observing the height of the top end of the auxiliary positioning rod 126 during the operation process, at this time, the height difference between the liquid level in the blood storage bottle 150 and the position of the rabbit heart is 55 cm. Compared with the way of determining the height of the liquid level in the blood storage bottle 150 by the length mark 122a on the vertical rod 122 or by the external measuring tool, the way of positioning by using the auxiliary positioning rod 126 in the embodiments of the application has the characteristics of more intuitive and convenient observation process.
[0042] In some embodiments, the second fixing assembly 124 is horizontally provided with a laser emitting cylinder 127, and the emitting end of the laser emitting cylinder is directed to the operation table 110. In the embodiments of the application, by setting the horizontal laser emitting cylinder 127, the visible light emitted by the laser emitting cylinder 127 can be projected on the height near the heart of the rabbit (since the height of the laser emitting cylinder 127 and the transducer 160 does not necessarily coincide, therefore the projection position is not necessarily located at the position of the heart of the rabbit, and should be adjusted appropriately) after the laser reflecting cylinder is opened, at this time, it can be confirmed that the heart of the rabbit and the transducer 160 are at the same height.
[0043] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application, and they should be covered in the scope of the claims and the specification of the application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.
Claims
1. An auxiliary device for preparing a rabbit model of hemorrhagic shock, characterized in that, It comprises an operating table, an iron stand and a signal acquisition device. An arterial cannula is arranged at the operating table, and the end of the arterial cannula is communicated with a first rubber tube and a second rubber tube through a tee pipe, the end of the first rubber tube is communicated with a blood storage bottle, and the end of the second rubber tube is communicated with a transducer. The iron stand comprises a base and a vertical rod fixed vertically on the top of the base, the central axis of the vertical rod is perpendicular to the plane where the top plane of the base is located, the blood storage bottle is connected to the vertical rod through a first fixing assembly, and the transducer is connected to the vertical rod through a second fixing assembly.
2. The device according to claim 1, wherein, A hemostatic clamp is arranged at the position close to the blood storage bottle of the first rubber tube, and the transducer is connected to the signal acquisition device.
3. The device according to claim 1, wherein, The material of the blood storage bottle is light-transmitting, and a capacity scale mark is arranged on the outer wall of the blood storage bottle.
4. The device according to claim 3, wherein, A bubble level is arranged on the top of the base, and adjustable supporting feet for adjusting the level of the base are arranged at the four corners of the bottom of the base.
5. The device according to claim 3, wherein, The bubble level is two, and the two bubble levels are arranged vertically.
6. The device according to claim 5, wherein, The adjustable supporting feet comprise a first limiting rod fixed to the bottom of the base, a second limiting rod coaxially arranged below the first limiting rod, a threaded cylinder jointly sleeved between the first limiting rod and the second limiting rod, and threads arranged on the outer walls of the first limiting rod and the second limiting rod with opposite directions.
7. The device according to any one of claims 3 to 6, wherein the device is used for preparing a rabbit model of hemorrhagic shock, and the device further comprises a blood collection device. The bottom end of the second limiting rod is connected with a wear-resistant sheet, and the bottom of the wear-resistant sheet is provided with anti-skid protrusions.
8. The device according to claim 1, wherein, A length identification scale for identifying length is arranged on the vertical rod.
9. The device according to claim 8, wherein, The second fixing assembly comprises a sleeve ring sleeved on the vertical rod, a U-shaped clamp for clamping the transducer is arranged on one side of the outer wall of the sleeve ring, a positioning threaded rod is horizontally screwed on the side of the sleeve ring away from the U-shaped clamp, and the end of the positioning threaded rod abuts against the vertical rod.
10. The device according to claim 1, wherein, A top vertical auxiliary positioning rod is arranged on the sleeve ring, and the length of the auxiliary positioning rod satisfies that the height from the center point of the U-shaped clamp to the top point of the auxiliary positioning rod is 55 cm. A laser emission cylinder is horizontally arranged on the second fixing assembly, and the emission end of the laser emission cylinder points to the operating table.