Adjustable tweezers for small animal experiment intubation model
By designing adjustable forceps, the problem of difficult operation of cannulation models in small animal experiments was solved, realizing convenient and accurate cannulation and blood collection, reducing the technical requirements for operators and the risk of animal injury.
Patent Information
- Application Number
- CN202422761672.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-12
AI Technical Summary
In existing technologies, cannulation models are difficult to operate in small animal experiments, especially for small blood vessels or bile ducts, which are easily damaged and have limited operating space, resulting in inaccurate blood collection and affecting the determination of pharmacokinetic parameters.
An adjustable tweezers was designed, including a shell, a left arm, a right arm, and a head expander. The left and right arms are elastically expanded by a switch. With the help of a limiting block and a sliding component, the tweezers are self-locking and easy to operate, increasing the operating space.
It improves the ease of operation and accuracy of the intubation model, reduces harm to animals, ensures accurate blood collection within the specified time, and lowers the technical requirements for operators.
Smart Images
Figure CN223569445U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of experimental animal medical devices, and in particular to an adjustable forceps for a small animal experimental intubation model. BACKGROUND
[0002] At present, rats, mice, cotton rats, hamsters and other animals are commonly used experimental animals in the field of medical teaching and research, and injection, blood sampling and surgical operation are necessary in drug research; in drug metabolism experiments, accurate blood sampling is required at different time nodes, and the time before and after the sampling should not exceed 30s. If the blood sampling time is deviated, the determination of the pharmacokinetic parameters will be affected, which may lead to inaccurate final data and affect the experimental results.
[0003] At the same time, the technical ability of the operator is also required to be high, and standardization and normalization are required. When blood sampling at a dense time point, the accuracy of blood sampling must be ensured, and the technical ability must be excellent, and a needle can see blood, and injection or collection cannot be repeated to reduce the use and harm of animals. The time and personnel also need to be coordinated: accurate time arrangement and personnel coordination are required for blood sampling at a dense time point to ensure that blood sampling is completed within the specified time. Especially, additional manpower and time resources are required during non-working hours.
[0004] Therefore, in the pharmacological and pharmacodynamic experiments, an intubation model is essential, and whether it is a blood vessel intubation model or a bile duct intubation model, the animal sample can be quickly, conveniently and safely collected at a certain time node. However, the intubation model is difficult to operate, mainly because the blood vessel or bile duct is thin and has poor visibility; the pipeline is fragile and easy to be damaged or broken; the operation space is small, and the small diameter of the blood vessel or bile duct increases the difficulty of intubation; and long-time operation may cause blood clots or other impurities to easily block the blood vessel or bile duct, which may cause intubation failure or pipeline damage.
[0005] The diameter of the rat carotid artery is 2-3mm, and the diameter of the rat common bile duct is about 1mm; the commonly used catheter has a diameter of 1-1.5mm, and when the blood vessel opening is flat, it is difficult to operate; the conventional ophthalmic needle can be inserted into the pipeline, but it is not enough to support the pipeline, and the intubation difficulty is still great. The utility model is a surgical forceps for an intubation model, and the head of the forceps is round when supporting, which can assist the operator to perform intubation operation. CONTENT OF THE UTILITY MODEL
[0006] In order to provide a pipeline supporting forceps for an intubation model animal, the surgical forceps is a tool with simple structure and convenient operation, which can be used for various intubation models of rats and mice, and is widely used in pharmacological and pharmacodynamic, toxicological and other experimental operations. The present application provides an adjustable forceps for a small animal experimental intubation model.
[0007] The adjustable forceps for the intubation model of small animal experiments provided in the application adopts the technical scheme as follows:
[0008] The adjustable forceps for the intubation model of small animal experiments comprises a shell and a surgical forceps body, the surgical forceps body comprises a left arm, a right arm and a head expander, the left arm and the right arm are elastic by themselves, one end of the left arm and the right arm is fixed inside the shell, and the other end penetrates the shell, when at rest, the end of the left arm and the right arm away from the shell is in a natural open state, the head expander comprises a first circular arc, a second circular arc, a third circular arc and a fourth circular arc, wherein the first circular arc is rotationally connected with the left arm, the fourth circular arc is rotationally connected with the right arm, and a connecting piece is arranged between every two adjacent circular arcs, the first circular arc, the second circular arc, the third circular arc and the fourth circular arc are spliced into a circle when the left arm and the right arm are opened, and a switch for driving the four circular arcs to open or close is arranged on the shell.
[0009] By adopting the above technical scheme, when taking blood from the vein of a small animal, the switch on the shell can be driven first, and the left arm and the right arm of the surgical forceps body are as close as possible, at this time, the four circular arcs of the head expander are in a folded state and are folded between the left arm and the right arm, and do not affect the sharpness of the end of the left arm and the right arm, after the left arm and the right arm are inserted into the blood vessel, the shell is held, the switch is driven in reverse, the locking between the left arm and the right arm is released, and the left arm and the right arm are popped open by the elasticity of themselves, at this time, the four circular arcs of the head expander are unfolded and spliced into a circle, and the circle formed by the four circular arcs can expand the blood vessel to a certain area, which is convenient for the staff to take blood, and thus the problems of poor visibility and large operation difficulty caused by the thin blood vessel or bile duct can be solved, so as to achieve the purposes of simple structure and convenient operation.
[0010] Optionally, the switch comprises a knob cap and a sliding seat, the knob cap and the sliding seat are fixedly connected, the sliding seat abuts against the left arm, a plurality of protrusions are fixedly arranged inside the shell and are arranged at intervals along the length direction of the shell, a limiting block is slidably connected in the sliding seat, and the sliding assembly for driving the limiting block to slide is arranged in the switch along the direction of approaching or moving away from the protrusions.
[0011] By adopting the above technical scheme, when the surgical forceps body is at rest and is initially inserted into the blood vessel, the left arm and the right arm are in a close state, at this time, the limiting block is limited between the two adjacent protrusions, so as to realize the function of self-locking and also to reduce the sliding of the switch caused by external force, when the left arm and the right arm need to be opened, the limiting between the limiting block and the protrusions can be released only by using the sliding assembly.
[0012] Optionally, the sliding assembly comprises a pressing rod, a first spring and a second spring, the pressing rod is fixed through the knob cap and the first spring, one end of the first spring away from the pressing rod is fixed with the knob cap, the pressing rod is fixed with the limiting block, one end of the limiting block away from the protrusion is fixed with the second spring, and the second spring is fixed with the sliding seat.
[0013] By adopting the above technical scheme, when the limiting of the limiting block needs to be released, the pressing rod only needs to be pressed away from the protrusion, the pressing rod compresses the first spring, and the limiting block is driven to slide away from the protrusion, and the first spring and the second spring can provide buffers for the movement of the pressing rod and the limiting block respectively.
[0014] Optionally, an arc is arranged at one end of the protrusion close to the limiting block.
[0015] By adopting the above technical scheme, the arc on the protrusion can make the limiting block more stable and smooth when moving from between two adjacent protrusions to the next two adjacent protrusions for limiting.
[0016] Optionally, a first rotating shaft is fixed on the first arc, the first rotating shaft is perpendicular to the length of the left arm, rotating teeth are rotatably connected at both ends of each arc, adjacent two rotating teeth are connected through a connecting piece, a driven tooth is fixed at one end of the first rotating shaft away from the first arc, a first rack is slidably connected in the left arm, the first rack is meshed with the driven tooth, and a driving assembly for driving the first rack to slide is arranged in the shell.
[0017] By adopting the above technical scheme, when the driving assembly drives the first rack to slide, the first rack is meshed with the driven tooth, so as to drive the driven tooth to rotate, the rotation of the driven tooth drives the first rotating shaft to rotate, so as to drive the rotation of the first arc, the movement of the first arc, through the rotating teeth and the connecting piece, and the opening and closing of the four arcs can be realized.
[0018] Optionally, the driving assembly comprises a second rack, a driving tooth and a transmission tooth, the pressing rod is fixed with the second rack, the driving tooth is meshed with the second rack, the driving tooth is coaxially fixed with the transmission tooth, and the transmission tooth is meshed with the first rack.
[0019] By adopting the above technical scheme, when the left arm and the right arm are closed, the four arcs of the head expander need to be folded at this time, the pressing rod is pressed, and the switch is slid away from the tip of the left arm, the movement of the second rack is driven when the pressing rod moves, the second rack drives the driving tooth to rotate, the rotation of the driving tooth synchronously drives the transmission tooth to rotate, and the transmission tooth is meshed with the first rack when rotating, so as to drive the first rack to move.
[0020] Optionally, the length of the left arm is longer than the length of the right arm.
[0021] By adopting the technical scheme, the left arm is longer than the right arm, so that the tip is thinner and more conducive to piercing into the blood vessel.
[0022] Optionally, the surface of the shell is provided with anti-skid lines.
[0023] By adopting the technical scheme, the surface of the shell is provided with anti-skid lines, which not only increases the roughness of the surface of the shell, but also facilitates the fixation of the hand and increases the comfort of the hand.
[0024] In summary, the present application has at least one of the following beneficial technical effects:
[0025] 1. When blood is taken from the blood vessel or bile duct of an animal, the left arm and the right arm of the surgical forceps body are pinched first, so that the four arcs of the head expander are in a superimposed state. After being inserted into the blood vessel or bile duct, the switch is driven, and the left arm and the right arm are expanded by their own elasticity, so that the head expander is expanded into a circle, which increases the operation space of the staff and facilitates the staff to insert the tube and take blood;
[0026] 2. The limiting block on the switch and the plurality of protrusions in the shell limit each other, so that the switch is self-locked. In particular, when the surgical forceps body is at rest and before being inserted into the blood vessel, the staff does not need to pinch with the thumb or index finger all the time, and the left arm and the right arm can be in close contact for a long time. When the limiting of the limiting block needs to be released, the limiting block is pushed away from the protrusions by pressing the pressing rod, and the switch is slid away from the head expander, so that the left arm and the right arm are opened. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;
[0028] Figure 2 is Figure 1 a partial enlarged schematic diagram of part A in
[0029] Figure 3 is a schematic diagram of the folded structure of the head expander;
[0030] Figure 4 is a schematic diagram of the cross-sectional structure of the switch;
[0031] Figure 5 is a schematic diagram of the internal structure of the shell and the left arm.
[0032] In the figure, 1, the shell; 11, the protruding block; 2, the surgical forceps main body; 21, the left arm; 22, the right arm; 23, the head prop; 231, the first circular arc; 232, the second circular arc; 233, the third circular arc; 234, the fourth circular arc; 235, the gear; 236, the connecting piece; 237, the baffle; 3, the switch; 31, the knob cap; 32, the sliding seat; 321, the limiting block; 4, the sliding assembly; 41, the pressing rod; 42, the first spring; 43, the second spring; 5, the driving assembly; 51, the first rack; 52, the second rack; 53, the driving tooth; 54, the transmission tooth; 55, the driven tooth. DETAILED DESCRIPTION
[0033] The following description will be made in conjunction with the accompanying drawings. Figures 1-5 The application is further described in detail.
[0034] The application discloses an adjustable forceps for a small animal experimental intubation model.
[0035] Reference Figure 1 An adjustable forceps for a small animal experimental intubation model comprises a shell 1 and a surgical forceps main body 2, the surgical forceps main body 2 comprises a left arm 21, a right arm 22 and a head prop 23, the left arm 21 and the right arm 22 are fixed at one end inside the shell 1 and penetrate the shell 1 at the other end, the shell 1 is provided with a curvature, and the curvature is more in line with human hand ergonomics, in addition, the shell 1 is also provided with anti-skid lines, which increases the roughness of the surface of the shell 1 and increases the friction, and also makes the grip more comfortable.
[0036] Reference Figure 1 , Figure 2 and Figure 3 The shell 1 is internally provided with a containing groove, the left arm 21 and the right arm 22 are fixed at one end and are fixed at the groove bottom at the same time, when the shell 1 and the surgical forceps main body 2 are horizontally arranged, the right arm 22 is in line with the side wall of the containing groove, the left arm 21 and the right arm 22 are elastic, when at rest, the left arm 21 and the right arm 22 are in a natural open state at the end away from the shell 1, at this time, the head prop 23 is opened into a circle, on the shell 1, the switch 3 is arranged at one third of the position close to the tip of the left arm 21 and the right arm 22, before the surgical forceps main body 2 is inserted into the blood vessel, the switch 3 is pushed to make the left arm 21 and the right arm 22 close, and the head prop 23 is folded, the right arm 22 is 1 mm longer than the left arm 21, so that the tip of the surgical forceps main body 2 is more slender and is easier to be inserted into the blood vessel.
[0037] Reference Figure 4 and Figure 5The switch 3 comprises a knob cap 31 and a sliding seat 32, the knob cap 31 and the sliding seat 32 are fixedly connected, a sliding groove is formed on the shell 1 along the length direction of the shell 1, the knob cap 31 penetrates through the sliding groove and slides along the length direction of the shell 1, the sliding seat 32 abuts against the left arm 21, when the switch 3 slides towards the tip of the left arm 21, the fixed seat can abut against the left arm 21, so that the left arm 21 gradually adheres to and approaches the right arm 22.
[0038] A plurality of protrusions 11 are horizontally fixed on the side wall of the accommodation groove in the shell 1, the plurality of protrusions 11 are arranged at intervals along the length direction of the shell 1, a limiting block 321 is slidingly connected in the sliding seat 32, the limiting block 321 is arranged on the side of the protrusion 11 which is close to or far away from the protrusion 11, the protrusion 11 is arranged with an arc on the side which is close to the limiting block 321, and the limiting block 321 is also arranged with an arc on the side which is close to the protrusion 11, so as to facilitate the limiting block 321 to slide out of the two adjacent protrusions 11 and move to the other two adjacent protrusions 11.
[0039] Reference Figure 2 , Figure 3 and Figure 4 A sliding assembly 4 is arranged in the switch 3, the sliding assembly 4 comprises a pressing rod 41, a connecting rod, a first spring 42 and a second spring 43, the pressing rod 41 horizontally penetrates through the knob cap 31 and is fixed with the first spring 42, one end of the first spring 42 away from the pressing rod 41 is fixed with the knob cap 31, the connecting rod is vertically arranged, one end of the connecting rod is fixed with the pressing rod 41, and the other end is fixed with the limiting block 321, one end of the limiting block 321 away from the protrusion 11 is fixed with the second spring 43, and the second spring 43 is fixed with the sliding seat 32.
[0040] The head expander 23 comprises a first circular arc 231, a second circular arc 232, a third circular arc 233 and a fourth circular arc 234, wherein both ends of each circular arc are rotatably connected with a gear tooth 235, adjacent two gear teeth 235 are meshed with each other, and a connecting piece 236 is arranged between the adjacent two gear teeth 235 for connection, one end of the first circular arc 231 close to the third circular arc 233 is fixed with a baffle 237, when the first circular arc 231 and the third circular arc 233 are opened, the baffle 237 abuts against the third circular arc 233, and in the same way, the second circular arc 232 is also fixed with the baffle 237, when the second circular arc 232 and the fourth circular arc 234 are opened, the baffle 237 abuts against the fourth circular arc 234, which can increase the supportability of the head expander 23 as a whole.
[0041] The first circular arc 231 is coaxially fixed with a first rotating shaft near the rotating tooth 235 of the left arm 21, the first rotating shaft is rotationally connected with the left arm 21, and the first rotating shaft is arranged in parallel to the opening and closing direction of the left arm 21 and the right arm 22; the rotating shaft direction of the rotating tooth 235 between the second circular arc 232 and the third circular arc 233 is perpendicular to the opening and closing direction of the left arm 21 and the right arm 22; the fourth circular arc 234 is fixed with a second rotating shaft near the rotating tooth 235 of the right arm 22, and the second rotating shaft is rotationally connected with the right arm 22.
[0042] With reference to Figure 2 Figure 3 Figure 4 Figure 5 The driving assembly 5 is further arranged in the shell 1 and the switch 3, and the driving assembly 5 comprises a second rack 52, a driving tooth 53, a transmission tooth 54 and a driven tooth 55; the pressing rod 41 is fixed with the second rack 52; the driving tooth 53 is engaged with the second rack 52; the driving tooth 53 and the transmission tooth 54 are coaxially fixed by a support rod; the transmission tooth 54 is engaged with the first rack 51; the first rotating shaft is fixed with the driven tooth 55 through the side wall of the left arm 21; and the driven tooth 55 is engaged with the first rack 51.
[0043] When the surgical forceps body 2 is accommodated in the shell 1 or the tip of the surgical forceps body 2 is inserted into a blood vessel, the sliding seat 32 abuts against the left arm 21, so that the left arm 21 and the right arm 22 are closed; at this time, the limiting block 321 is limited by two adjacent protrusions 11; when the head expander 23 needs to be expanded, the thumb presses the pressing rod 41, the pressing rod 41 pushes the connecting rod, the first spring 42 and the second spring 43 are compressed, and the limiting block 321 is limited from the protrusions 11 at the same time; at this time, the knob 31 is slid in a direction away from the tips of the left arm 21 and the right arm 22; at this time, the second rack 52 drives the driving tooth 53 and the transmission tooth 54 to rotate at the same time, drives the first rack 51 to move, and further drives the driven tooth 55 to move; the driven tooth 55 drives the first rotating shaft to rotate, and further drives the first circular arc 231 to rotate; the first circular arc 231 drives the second circular arc 232 to rotate through the rotating tooth 235 and the connecting piece 236, and further drives the third circular arc 233 and the fourth circular arc 234 to rotate; in addition to the elastic effect of the left arm 21 itself, the head expander 23 can be expanded into a circular shape; the first spring 42 and the second spring 43 restore the original length after the pressing rod 41 is released; at this time, the limiting block 321 is again limited by two adjacent protrusions 11; when four circular arcs need to be folded, the switch 3 only needs to be pushed towards the tip of the left arm 21; in this way, the self-locking and convenient unlocking of the switch 3 can be realized, the stability of the switch 3 itself is increased, the shaking caused by external force is reduced, and the automatic opening and folding of the four circular arcs of the head expander 23 can also be realized.
[0044] The implementation principle of the adjustable forceps for a small animal experiment intubation model is as follows: when the surgical forceps body 2 and the shell 1 are received and stand still, or before blood taking experiment is performed, the left arm 21 and the right arm 22 are in a closed state, and the four circular arcs of the head expander 23 are in a folded state, at this time, the limiting block 321 is limited between two adjacent protrusions 11, after the left arm 21 and the right arm 22 are inserted into the blood vessel, the thumb presses the pressing rod 41, the pressing rod 41 drives the limiting block 321 to move away from the protrusion 11, and at the same time, the knob cap 31 is slid away from the tip of the left arm 21, the limiting of the limiting block 321 by the protrusion 11 is released, at this time, the left arm 21 is expanded under the action of the self elasticity, and the four circular arcs of the head expander 23 are expanded into a circle, so that the staff member can take blood conveniently.
[0045] The embodiments of the specific implementation are the preferred embodiments of the application, and are not intended to limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.
Claims
1. An adjustable forceps for a small animal experimental intubation model, characterized by: The utility model provides a surgical forceps, including shell (1) and surgical forceps body (2), surgical forceps body (2) includes left arm (21), right arm (22) and head prop (23), left arm (21) and right arm (22) have elasticity, left arm (21) and right arm (22) one end is fixed in the inside of shell (1), and the other end all are through shell (1), when at rest, left arm (21) and right arm (22) the end away from shell (1) is in natural open state, head prop (23) includes first circular arc (231), second circular arc (232), third circular arc (233) and fourth circular arc (234), wherein, first circular arc (231) and left arm (21) rotationally connected, fourth circular arc (234) and right arm (22) rotationally connected, and connecting piece (236) is arranged between every two adjacent circular arcs, and first circular arc (231), second circular arc (232), third circular arc (233) and fourth circular arc (234) are spliced into a circle when left arm (21) and right arm (22) open, and shell (1) is provided with switch (3) for driving four circular arcs to open or close.
2. The adjustable tweezers for a cannulation model of a small animal experiment according to claim 1, wherein: The switch (3) includes a knob cap (31) and a sliding seat (32), the knob cap (31) and the sliding seat (32) are fixedly connected, the sliding seat (32) abuts against the left arm (21), a plurality of protrusions (11) are fixedly arranged in the shell (1), the protrusions (11) are arranged at intervals along the length direction of the shell (1), a limiting block (321) is slidably connected in the sliding seat (32), the limiting block (321) is arranged in the switch (3) and is used for driving the limiting block (321) to slide in the direction of approaching or moving away from the protrusions (11).
3. The adjustable tweezers for a cannulation model of small animal experiments according to claim 2, characterized in that: The sliding assembly (4) includes a pressing rod (41), a first spring (42) and a second spring (43), the pressing rod (41) penetrates the knob cap (31) and is fixed with the first spring (42), one end of the first spring (42) away from the pressing rod (41) is fixed with the knob cap (31), the pressing rod (41) is fixed with the limiting block (321), one end of the limiting block (321) away from the protrusions (11) is fixed with the second spring (43), and the second spring (43) is fixed with the sliding seat (32).
4. The adjustable tweezers for small animal experimental intubation model according to claim 2, characterized in that: An end of the protrusion (11) close to the limiting block (321) is provided with an arc.
5. The adjustable tweezers for a cannulation model of small animal experiments according to claim 3, characterized in that: A first rotating shaft is fixed on the first circular arc (231), the first rotating shaft is perpendicular to the length of the left arm (21), rotating teeth (235) are rotatably connected at both ends of each circular arc, adjacent two rotating teeth (235) are connected through the connecting piece (236), a driven tooth (55) is fixed at one end of the first rotating shaft away from the first circular arc (231), a first rack (51) is slidably connected in the left arm (21), the first rack (51) is engaged with the driven tooth (55), and a driving assembly (5) is arranged in the shell (1) and is used for driving the first rack (51) to slide.
6. The adjustable tweezers for a cannulation model of small animal experiments according to claim 5, characterized in that: The driving assembly (5) comprises a second rack (52), a driving tooth (53) and a transmission tooth (54), the pressing rod (41) is fixed with the second rack (52), the driving tooth (53) is engaged with the second rack (52), the driving tooth (53) is coaxially fixed with the transmission tooth (54), and the transmission tooth (54) is engaged with the first rack (51).
7. The adjustable tweezers for a cannulation model of small animal experiments according to claim 1, characterized in that: The left arm (21) is longer than the right arm (22) in length.
8. The adjustable tweezers for a cannulation model of a small animal experiment according to claim 1, wherein: The surface of the shell (1) is provided with anti-skid lines.