Animal ear edge blood vessel puncture fixator
By designing an animal ear vascular puncture fixer and adopting a clamp structure and torsion spring mechanism, the problem of difficulty in puncture and fixing of the ear vascular vessels is solved, stable clamping and operation convenience is achieved, and the risk of tissue damage is reduced.
Patent Information
- Application Number
- CN202421350000.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-06-14
AI Technical Summary
In animal experiments, the ear veins were difficult to puncture and fix, resulting in difficulty in administration, infusion and monitoring of blood pressure, and risk of infection and bleeding.
An animal ear edge vascular puncture fixator is designed, using a clamp structure with upper clamp solid and lower clamp solid bottom hinged through a pin shaft. There are jig teeth on the inner side of the clamp arm, the end of the clamp handle is obtusely angled, and the clamp tail shape is dovetail. It is used in combination with a torsion spring to achieve stable clamping of blood vessels and reduce the difficulty of puncture.
It realizes stable puncture and fixation of the ear veins, reduces the difficulty of puncture, reduces tissue damage, and facilitates drug delivery, infusion and blood pressure monitoring.
Smart Images
Figure CN223169835U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of animal medical experiments, and particularly relates to an animal ear marginal blood vessel puncture fixator. Background Art
[0002] Due to the anatomical characteristics and behavioral habits of animals, it is very difficult to place a catheter during arteriovenous surgery and retain the catheter after surgery for drug administration, infusion, and blood pressure monitoring. The problem with the technique of incising and puncturing a large blood vessel for catheter placement in animal experiments is that it increases the incision, as well as the possibility of infection and bleeding.
[0003] The marginal ear artery and marginal ear vein are a group of blood vessels in large animals that are relatively easy to manage. They are far from the limbs, and it is convenient to remove hair, and they are easy to fix. However, the blood vessels in the ear lie on the auricular cartilage, lacking muscle restraint around them, and have a large degree of mobility. Coupled with the tough skin of large animals, the resistance to piercing the skin is very obvious. Therefore, the difficulty of blood vessel puncture and catheter placement is extremely high. At the same time, once punctured, due to its anatomical characteristics, it is very easy to form a large area of hematoma and lose the opportunity for re-operation. In animal experiments, it is difficult to puncture the body of the marginal ear blood vessels, and it is also difficult to fix and retain the blood vessel puncture catheter.
[0004] There is an urgent need in animal experiments to develop a device that can clamp tissues without causing damage, facilitate operations such as drug administration, infusion, blood pressure monitoring, and blood sampling for experimental animals by experimenters, and can conveniently fix the puncture catheter for the marginal ear artery and vein. Content of the Utility Model
[0005] The utility model aims to overcome the deficiencies in the prior art and provides an animal ear marginal blood vessel puncture fixator. When clamping the blood vessel, the tissue will not be damaged, facilitating operations such as drug administration, infusion, blood pressure monitoring, and blood sampling for experimental animals by experimenters.
[0006] To achieve the above object, the utility model is realized through the following technical solutions. An animal ear marginal blood vessel puncture fixator includes an upper clamping body and a lower clamping base. The upper clamping body and the lower clamping base are hinged by a pin shaft to form a clamping pliers main body that can be opened and closed up and down. A torsion spring is sleeved on the pin shaft. The upper clamping body includes a clamping pliers and a pliers handle to form an integral structure. The clamping pliers include two parallel clamping arms and a circular positioning ring. The circular positioning ring is connected to the pliers handle. The joint between the circular positioning ring and the pliers handle is connected at an obtuse angle. The end of the pliers handle is provided with a clamping tail in the shape of an obtuse angle. The lower clamping base includes a clamping pliers base and a clamping pliers handle to form an integral structure. The joint between the clamping pliers base and the clamping pliers handle is connected at an obtuse angle.
[0007] Further, the shape of the clamping tail of the upper clamping body is in the shape of a swallowtail.
[0008] Further, a connecting ear is provided at the pin connection of the upper clamping body, and a pin hole is provided on the connecting ear.
[0009] Further, a connecting ear is provided at the position corresponding to the pin joint of the upper clamping solid on the lower clamping bottom. A pin hole is provided on the connecting ear, and a pin shaft penetrates through the pin hole.
[0010] Further, a clamping tooth is provided on the inner side surface of the clamping arm of the clamping pliers.
[0011] Further, a raised middle ridge is provided along the longitudinal direction on the upper surface of the clamping pliers bottom of the lower clamping bottom.
[0012] Further, the obtuse angle is 130° - 135°.
[0013] Further, the diameter of the circular positioning ring is 10 - 15 mm.
[0014] Beneficial effects: Compared with the prior art, the utility model overcomes the problems that it is difficult to fix and retain the puncture and catheterization of the body blood vessels in the existing animal experiments, and it is difficult to successfully puncture the marginal ear blood vessels. A novel, convenient, highly practical puncture fixator with a reasonable structural design is provided, which can facilitate the puncture and fixation of the marginal ear artery and vein catheterization, and the clamping of tissues will not cause damage, facilitating the experimenters to administer drugs, infuse fluids, monitor blood pressure, draw blood and other operations on the experimental animals. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic structural diagram of the utility model;
[0016] Figure 2 is a schematic structural diagram of the upper clamping solid;
[0017] Figure 3 is a side view of the utility model;
[0018] Figure 4 is a schematic diagram of the utility model clamping the ear artery.
[0019] In the figure: 1. Upper clamping solid, 1-1. Clamping pliers, 1-1-1. Clamping arm, 1-1-2 Circular positioning ring, 1-2. Plier handle, 1-2-1. Clamping tail, 2. Lower clamping bottom, 2-1. Clamping pliers bottom, 2-2. Clamping pliers handle, 3. Pin shaft, 4. Torsion spring, 5. Connecting ear, 6. Clamping tooth, 7. Middle ridge, 8. Blood vessel. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The following details the specific embodiments provided according to the utility model in combination with preferred embodiments: See the appendix Figures 1-3, this embodiment provides an animal ear edge blood vessel puncture fixator, which includes an upper clamping body 1 and a lower clamping base 2. The upper clamping body and the lower clamping base are hinged by a pin shaft 3 to form a clamping pliers body that can be opened and closed up and down. A torsion spring 4 is sleeved on the pin shaft. The upper clamping body includes a clamping pliers 1-1 and a pliers handle 1-2 that form an integral structure. The clamping pliers include two parallel clamping arms 1-1-1 and a circular positioning ring 1-1-2. The circular positioning ring is connected to the pliers handle. The joint of the circular positioning ring and the pliers handle is connected at an obtuse angle. The end of the pliers handle is provided with an obtuse-angle clamping tail 1-2-1. The lower clamping base includes a clamping pliers base 2-1 and a clamping pliers handle 2-2 that form an integral structure. The joint of the clamping pliers base and the clamping pliers handle is connected at an obtuse angle. The upper clamping body 1 and the lower clamping base 2 are connected by a torsion spring 4 sleeved on the pin shaft. Its structure is similar to a clothes hanger. When in use, press down the clamping tail of the upper clamping body 1 to open it, and release the clamping tail to fix the blood vessel.
[0021] In a preferred solution of this embodiment, the shape of the clamping tail of the upper clamping body is a dovetail shape.
[0022] In a preferred solution of this embodiment, connecting ears 5 are respectively provided at the pin connection positions of the upper clamping body and the lower clamping base. A pin hole is provided on the connecting ear, and the pin shaft passes through the pin hole.
[0023] In a preferred solution of this embodiment, a clamping tooth 6 is provided on the inner side surface of the clamping arm of the clamping pliers to increase the clamping force.
[0024] In a preferred solution of this embodiment, a raised middle ridge 7 is provided along the longitudinal direction on the upper surface of the clamping pliers base of the lower clamping base to prevent the clamped blood vessel from rolling. In this embodiment, the length of the middle ridge is 50 mm.
[0025] In a preferred solution of this embodiment, the obtuse angle is 130° - 135°. In this embodiment, the obtuse angle is 135°. To facilitate the adjustment of the angle of the needle tail during puncture.
[0026] In a preferred solution of this embodiment, the diameter of the circular positioning ring is 10 - 15 mm. In this embodiment, the diameter is 15 mm.
[0027] The total length of the fixator in this embodiment is 120 mm, where: the length of the clamping arm is 50 mm, the diameter of the circular positioning ring is 15 mm, the length of the pliers handle is 50 mm, the length from the circular positioning ring of the pliers handle to the pin hole is 30 mm, and the length of the clamping tail is 20 mm. The distance between the two parallel clamping arms is 3 mm.
[0028] Working process:
[0029] 1. In animal experiments, first remove the body hair behind the animal's ear to expose the skin;
[0030] 2. After finding the blood vessel, block the proximal end and observe the change in blood vessel filling. If the blood vessel becomes thicker, it is a venous blood vessel; if the pulsation disappears, it is an arterial blood vessel.
[0031] 3. After opening the auricular marginal blood vessel puncture fixator of the present utility model, clamp the ear in the direction against the ear tip, so that the two parallel clamping arms 1-1-1 of the clamping solid on the fixator are placed on both sides of the target blood vessel, and then clamp the blood vessel 8 with the lower clamping bottom, and bend the ear tip downward along the direction of the fixator.
[0032] 4. Disinfect near the circular positioning ring, penetrate the skin with a puncture needle of an appropriate model, and puncture the blood vessel along the gap between the clamping arms. After piercing the blood vessel, lower the needle tail, and send the puncture needle cannula into the blood vessel lumen with the modified percutaneous puncture technique (Seldinger technique).
[0033] 5. After pulling out the puncture needle core, first connect the liquid path or the pressure measuring tube, then loosen the fixator, withdraw the fixator in the reverse direction along the original direction, and then fix the puncture needle cannula to complete the puncture catheterization operation.
[0034] The proximal shaft section of the auricular marginal blood vessel puncture fixator is bent 35 degrees towards the clamping bottom side, aiming to create space for depressing the needle tail when the puncture needle pierces the blood vessel, so that after the tip of the needle penetrates into the blood vessel, the long axis of the puncture needle can coincide with the long axis of the target blood vessel lumen, reducing the possibility of penetrating the inner wall of the blood vessel.
[0035] The distal clamping sections on both sides of the auricular marginal blood vessel puncture fixator can fix the blood vessel from both left and right sides, making the target blood vessel not easily displaced during the puncture catheterization process. During the puncture operation, the experimenter only needs to control the vertical direction angle of the puncture needle to penetrate the blood vessel, reducing the puncture difficulty and also reducing the possibility of penetrating the posterior wall of the blood vessel. There is a toothed ring left at the proximal end of the bilateral clamping. Inside the ring is the puncture disinfection area. The clamping on both sides expands outward here, facilitating the selection and adjustment of the puncture needle position.
[0036] The above detailed description of an animal auricular marginal blood vessel puncture fixator with reference to the embodiments is illustrative rather than restrictive. Several embodiments can be listed within the defined scope. Therefore, changes and modifications without departing from the overall concept of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. An animal ear edge blood vessel puncture fixator, characterized in that: It includes an upper clamping solid and a lower clamping base. The upper clamping solid and the lower clamping base are hinged by a pin shaft to form a clamping pliers body that can be opened and closed up and down. A torsion spring is sleeved on the pin shaft. The upper clamping solid includes a clamping pliers and a pliers handle to form an integral structure. The clamping pliers includes two parallel clamping arms and a circular positioning ring. The circular positioning ring is connected to the pliers handle. The joint between the circular positioning ring and the pliers handle is connected at an obtuse angle. The end of the pliers handle is provided with a clamping tail in an obtuse angle shape. The lower clamping base includes a clamping pliers base and a clamping pliers handle to form an integral structure. The joint between the clamping pliers base and the clamping pliers handle is connected at an obtuse angle.
2. The animal ear edge blood vessel puncture fixator according to claim 1, wherein: The clamping tail of the upper clamping solid is in the shape of a swallowtail.
3. The animal ear edge blood vessel puncture fixator according to claim 1 or 2, characterized in that: A connecting ear is provided at the pin connection of the upper clamping solid, and a pin hole is provided on the connecting ear.
4. The animal ear edge blood vessel puncture fixator according to claim 1, characterized in that: The lower clamping base is provided with a connecting ear corresponding to the pin connection of the upper clamping solid. A pin hole is provided on the connecting ear, and a pin shaft passes through the pin hole.
5. The animal ear edge blood vessel puncture fixator according to claim 1, characterized in that: The inner side surface of the clamping arm of the clamping pliers is provided with locking teeth.
6. The animal ear edge blood vessel puncture fixator according to claim 1 or 4, characterized in that: A raised middle ridge is provided longitudinally on the upper surface of the clamping pliers base of the lower clamping base.
7. The animal ear edge blood vessel puncture fixator according to claim 1, characterized in that: The obtuse angle is 130° - 135°.
8. The animal ear edge blood vessel puncture fixator according to claim 1, characterized in that: The diameter of the circular positioning ring is 10 - 15 mm.