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Syringe for articular cavity

A syringe and joint cavity technology, applied in the field of medical devices, can solve the problems of inability to effectively extract fluid in the joint cavity, articular cartilage, blood vessel injury, low universality of the syringe, etc., and achieve simple structure, improved safety, and reliability sex high effect

Active Publication Date: 2022-01-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a syringe for the joint cavity to solve the problem of the low universality of the syringe in the prior art, and the bent and small needles are easy to break the needle, which is easy to cause damage to the articular cartilage and blood vessels, and cannot be used effectively. Problems with underdrawing joint effusions

Method used

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  • Syringe for articular cavity
  • Syringe for articular cavity
  • Syringe for articular cavity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as Figure 1 to Figure 5 A syringe for the joint cavity is shown, comprising a syringe 1 and an outer needle 3 connected to the syringe 1, an inner needle 42 that can slide relative to the outer needle 3 is arranged inside the outer needle 3, the The inner needle 42 is made of flexible material;

[0052] The syringe also includes a control mechanism, the control mechanism is used to control the syringe to switch to the needle-out state or the needle-retract state, and in the needle-out state, the bottom end of the inner needle 42 extends to the outside of the outer needle 3 , in the narrowing state, the bottom end of the inner needle 42 is retracted to the inside of the outer needle 3 .

[0053] In some embodiments, such as figure 1 As shown, the outer needle head 3 is provided with a scale line 31 .

[0054] In one or more embodiments, the inner needle 42 is made of medical silicone rubber.

[0055] In one or more embodiments, preferably, the outer wall of the...

Embodiment 2

[0059] On the basis of Example 1, such as figure 2 and image 3 As shown, the control mechanism includes a control cylinder 41 sleeved on the outside of the outer needle head 3, and a chute 44 is opened on the control cylinder 41, and a control rod 43 is slidably arranged in the chute 44. The needle 3 is provided with an opening, the control rod 43 moves through the opening and is connected to the outer wall of the inner needle 42, and the control rod 43 is used to drive the inner needle 42 to move vertically.

[0060] In some embodiments, a traction rope 46 is connected to the bottom end of the inner needle 42 , and the traction rope 46 passes through the control cylinder 41 . During the descent process, when articular cartilage and blood vessels appear on the moving path of the inner needle, although the inner needle can use its own deformation to reduce the damage to the surrounding tissues, due to the small and complex volume of the joint cavity, there is still a certain...

Embodiment 3

[0066] On the basis of Example 1, such as Figure 4 and Figure 5 As shown, the control mechanism includes a control cylinder 41 sheathed on the outside of the outer needle 3, a rotating member 51 is provided on the control cylinder 41, and a gear is provided on one end of the rotating member 51 located in the control cylinder 41. 52, the outer needle head 3 is provided with an opening, and a push rod 55 connected to the outer wall of the inner needle head 42 is slidably arranged in the opening, and a transmission rod 53 is connected to the push rod 55, and a transmission rod 53 is provided on the transmission rod 53 The rack 54 is engaged with the gear 52 .

[0067] When controlling, by rotating the rotating part, the gear can be driven to rotate clockwise or counterclockwise. Through the meshing of the gear and the rack, the transmission rod is driven to move up or down in the vertical direction, and then the push rod and the inner needle head are driven to move vertically....

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Abstract

The invention relates to a syringe for an articular cavity, which comprises a needle cylinder and an outer needle head, an inner needle head capable of sliding relative to the outer needle head is arranged in the outer needle head, and the inner needle head is made of a flexible material; the syringe further comprises a control mechanism, the control mechanism is used for controlling the injector to be switched to a needle withdrawing state or a needle withdrawing state, in the needle withdrawing state, the bottom end of the inner needle head extends out of the outer needle head, and in the needle withdrawing state, the bottom end of the inner needle head is withdrawn into the outer needle head. The flexible inner needle head is used for position exploration and positioning in an articular cavity, after the flexible inner needle head makes contact with surrounding tissue, the inner needle head can change the orientation of the inner needle head through deformation, damage of the needle head to articular cartilage and blood vessels is effectively reduced, needle breakage is avoided fundamentally through the flexible material of the inner needle head, and safety is remarkably improved; the inner needle head can be better attached to a complex structure in an articular cavity, so that effusion in the articular cavity can be extracted more sufficiently, and the effusion extraction effect of the syringe is improved.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a syringe for joint cavity. Background technique [0002] Arthrocentesis is the use of a syringe to inject medicinal fluid into the joint cavity or extract the fluid in the joint cavity to assist in the diagnosis and treatment of joint diseases. Due to the narrow volume and complex structure of the submandibular joint cavity and the joint cavity of the palm, wrist and fingers, it is difficult to insert the needle. It is very dependent on the experience of the doctor. A little carelessness can easily damage the articular cartilage and blood vessels, resulting in hematoma, hemarthrosis, and hematoma at the puncture site. Complications such as septic arthritis. [0003] In order to reduce the difficulty of operation in the narrow joint cavity, improve the safety of operation, and relieve the pain of patients, syringes with different structures are designed according to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/00A61M5/32A61M5/46
CPCA61M5/32A61M5/3287A61M5/3286A61M5/329A61M5/3297A61M5/46A61M2005/3201
Inventor 祁荷栩方婕赵志河吴楠
Owner SICHUAN UNIV
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