A device for releasing the medial collateral ligament under knee arthroscopy

Abstract

The present invention relates to the field of medical device technology, specifically a medial collateral ligament release device under knee arthroscopy, comprising a handle, a guide cylinder, and a puncture needle; the guide cylinder is arranged at the front end of the handle, and the puncture needle is arranged inside the guide cylinder; a swing head is arranged at the end of the guide cylinder, and a swing component for controlling the rotation of the swing head and a pushing component for pushing the puncture needle are arranged on the handle; the swing head at the front end of the present invention can swing freely, which is convenient for controlling the puncture direction of the release needle, thereby improving the accuracy and safety of the operation. Since the swing head can swing freely, the doctor can flexibly adjust the direction of the puncture needle according to the needs of the operation, avoiding unnecessary damage to important surrounding structures such as the meniscus, and can also avoid the tool repeatedly entering and exiting the surgical incision when adjusting the cutting angle, thereby reducing damage and surgical risks.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a device for releasing the medial collateral ligament under knee arthroscopy. Background Art

[0002] Knee arthroscopy is a commonly used surgical method for treating knee joint lesions, especially for the treatment of the posterior horn of the medial meniscus. The surgical field of view and operating space are key factors affecting the smooth progress of the operation and reducing iatrogenic complications. Due to the narrowness of the medial compartment of the knee joint, the medial collateral ligament needs to be released during surgery to expand the space of the medial compartment and improve the field of view and operating space.

[0003] The traditional method of release is to use percutaneous acupuncture to release from the outside to the inside. This method is easy to damage the meniscus, and the skin is difficult to recover. It is often accompanied by complications such as pain, swelling, subcutaneous ecchymosis and eversion instability after surgery. Although the prior art such as CN201520324418.8 discloses an arthroscopic ligament mesh release knife, the knife head at its front end can be rotated, so that the angle of entry during release can be adjusted to avoid multiple cutters entering the surgical incision multiple times to cause damage. However, it can only rotate to a specified angle and cannot be freely adjusted according to surgical needs. In addition, a large space is required during the rotation process, and it is difficult to operate in a relatively narrow joint cavity. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a medial collateral ligament release device under knee arthroscopy. To solve the above technical problem, the technical solution provided by the present invention is as follows:

[0005] A knee arthroscopy medial collateral ligament release device comprises a handle, a guide cylinder and a puncture needle; the guide cylinder is arranged at the front end of the handle, and the puncture needle is arranged inside the guide cylinder;

[0006] The end of the guide cylinder is provided with a swing head, and the handle is provided with a swing component for controlling the rotation of the swing head and a pushing component for pushing the puncture needle;

[0007] The swing head is formed by hingedly connecting a plurality of hinge units in sequence, wherein the hinge unit comprises an annular body, and hinge heads are respectively arranged in pairs on both sides of the annular body, and the two pairs of hinge heads on both sides of the annular body are arranged vertically; a pull point fixing piece is arranged on the outer surface of the annular body, and the number of the pull wire fixing pieces is four, and corresponds to the hinge heads;

[0008] The pull wire passes through a pull wire fixing piece on the swing head, and the swing assembly pulls the pull wire to control the swing head to swing freely.

[0009] As an improvement, the number of the pulling wires is four, and the pulling wires arranged on the opposite side form a pulling wire group, and the two pulling wire groups respectively control the swing head to swing left and right or up and down.

[0010] As an improvement, the swing assembly includes two knobs and a transmission unit, and the two knobs respectively control the two wire groups to zoom in and out through the transmission unit;

[0011] The transmission unit includes a reel, a bevel gear, and a transmission gear set. The reel is provided with a wire groove. The wire pulling set passes through the wire groove and rotates synchronously with the reel. The bevel gear rotates synchronously with the reel.

[0012] A gear ring is provided on one side of the knob, and the gear ring drives the bevel gear and the reel to rotate through the transmission gear set, thereby driving one of the pull wires in the pull wire group to contract, and the pull wire on the opposite side to extend, thereby driving the swing head to swing.

[0013] As an improvement, a groove is provided in the wire trough, a fixing piece is provided on the pull wire, and the fixing piece is provided with a protrusion that is inserted into the groove at a position corresponding to the groove.

[0014] As an improvement, the two knobs are respectively arranged at the upper and lower ends of the handle, and a rotating pressure plate is provided on one side of the knob handle.

[0015] As an improvement, the front end of the swing head is provided with an extension portion for accommodating the needle head of the puncture needle.

[0016] As an improvement, the pushing assembly includes a push rod and a finger ring;

[0017] A central channel is provided inside the handle and inside the guide cylinder, the push rod is inserted into the central channel, and the puncture needle is detachably connected to the end of the push rod.

[0018] As an improvement, an elastic outer sleeve and a pressure ring are provided on the outer side of the guide cylinder;

[0019] The handle is provided with a connector for the outer sleeve to be inserted, the pressing ring is threadedly connected to the connector, and the pressing ring is sleeved on the outer sleeve from the outside to crimp and fix the outer sleeve.

[0020] As an improvement, the outer sleeve is provided with scales.

[0021] As an improvement, second finger loops are provided on both sides of the handle.

[0022] The present invention has the advantages that:

[0023] 1. The swing head at the front end of the present invention can swing freely, which is convenient for controlling the puncture direction of the release needle, thereby improving the accuracy and safety of the operation. Since the swing head can swing freely, the doctor can flexibly adjust the direction of the puncture needle according to the needs of the operation, avoiding unnecessary damage to the surrounding important structures such as the meniscus, and also avoiding the knife repeatedly entering and exiting the surgical incision when adjusting the cutting angle, thereby reducing damage and surgical risks.

[0024] 2. The present invention is provided with a scale on the outer sleeve, which is convenient for observation and measurement under knee arthroscopy, effectively improving surgical accuracy to avoid over-loosening or under-loosening, thereby improving the surgical effect and the patient's postoperative recovery quality.

[0025] 3. The present invention is easy to operate. The knob on the handle can be used to control the zoom of the pull wire group, so that the doctor can easily adjust the swing head. After the adjustment, the assembly can be pushed to quickly puncture and release. The present invention can effectively reduce the complex operations during the operation, improve the efficiency of the operation, and also reduce the labor intensity of the doctor, making the operation process smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of a medial collateral ligament release device for knee arthroscopy in Example 1.

[0027] Figure 2 This is an exploded view of a medial collateral ligament release device for knee arthroscopy in Example 1.

[0028] Figure 3 This is a structural diagram of a swing head in a medial collateral ligament release device for knee arthroscopy in Example 1.

[0029] Figure 4 This is a structural diagram of the articulation unit in an arthroscopic medial collateral ligament release device in Example 1.

[0030] Figure 5 This is a structural diagram of a swinging assembly in a medial collateral ligament release device for knee arthroscopy in Example 1.

[0031] Figure 6 This is a structural diagram of the reel in a medial collateral ligament release device for knee arthroscopy in Example 1.

[0032] Figure 7 This is a structural diagram of a pushing component in a medial collateral ligament release device for knee arthroscopy in Example 1.

[0033] Figure 8 This is a structural diagram of the connector in a medial collateral ligament release device for knee arthroscopy in Example 1.

[0034] The figure shows:

[0035] 1-handle, 11-second finger ring, 12-connecting head, 121-groove, 122-external thread, 2-guide cylinder, 21-swinging head, 22-hinge unit, 221-annular body, 222-hinge head, 223-pull point fixing piece, 23-extension part, 3-puncture needle, 4-swinging assembly, 41-pull wire, 411-fixing piece, 412-protrusion, 42-pull wire group, 43-knob, 44-transmission unit, 441-reel, 442-bevel gear, 443-transmission gear group, 444-wire groove, 445-groove, 45-pressure plate, 5-pushing assembly, 51-push rod, 52-finger ring, 6-center channel, 7-outer sleeve, 71-scale, 8-pressing ring. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0037] Example 1

[0038] This embodiment discloses a knee arthroscopy medial collateral ligament release device, comprising a handle 1, a guide cylinder 2, and a puncture needle 3. The guide cylinder 2 is arranged at the front end of the handle 1, and the puncture needle 3 is arranged inside the guide cylinder 2.

[0039] A swing head 21 is provided at the end of the guide tube 2 , and a swing component 4 for controlling the rotation of the swing head 21 and a pushing component 5 for pushing the puncture needle 3 are provided on the handle 1 .

[0040] like Figure 3-4 As shown, the swing head 21 includes a plurality of hinge units 22 hinged in sequence, and the hinge unit 22 includes an annular body 221, and hinge heads 222 are arranged in pairs on both sides of the annular body 221, and the two pairs of hinge heads 222 on both sides of the annular body 221 are vertically arranged; a pull point fixing piece 223 is provided on the outer surface of the annular body 221, and the number of the pull wire fixing pieces 223 is four, and they are arranged corresponding to the hinge heads 222.

[0041] A pull wire 41 is provided on the swing assembly 4 , and the pull wire 41 passes through a pull wire fixing member 223 on the swing head 21 . The swing assembly 4 pulls the pull wire 41 to control the swing head 21 to swing freely.

[0042] The number of the pull wires 41 is four, and the pull wires 41 arranged on the opposite side form a pull wire group 42, and the two pull wire groups 42 respectively control the swing head 21 to swing left and right or up and down.

[0043] The swing assembly 4 further includes two knobs 43 and a transmission unit 44 . The two knobs 43 respectively control the two pull-wire groups 42 to zoom in and out through the transmission unit 44 .

[0044] The transmission unit 44 includes a reel 441, a bevel gear 442, and a transmission gear set 443. The reel 441 is provided with a wire groove 444, the wire pulling set 42 passes through the wire groove 444 and rotates synchronously with the reel 441, and the bevel gear 442 rotates synchronously with the reel 441.

[0045] A groove 445 is provided in the wire groove 444, and a fixing member 411 is provided on the pull wire 41. The fixing member 411 is provided with a protrusion 412 that is inserted into the groove 445 at a position corresponding to the groove 445. The fixing member 411 can ensure that the pull wire assembly 42 can rotate with the reel 441.

[0046] The two transmission units 44 in this embodiment have the same working principle. The following takes one of them as an example to describe how the transmission unit 44 controls the swing head 21 to swing up and down or left and right: a gear ring 431 is provided on one side of the knob 43, and the gear ring 431 drives the bevel gear 442 to rotate through the transmission gear set 443, thereby driving the reel 441 to rotate. After the reel 441 rotates, it drives the wire group 42 to deviate to one side, causing one of the wires 41 in the wire group 42 to shrink, and the wire 41 on the opposite side to extend, thereby driving the swing head 41 to swing.

[0047] In practical applications, the swing amplitude of the swing head 21 can be controlled by changing the knob 43 by setting the transmission ratio of the transmission gear set 443. The smaller the transmission ratio, the higher the control accuracy of the swing head 21.

[0048] Two knobs 43 are respectively arranged at the upper and lower ends of the handle 1, and a rotatable pressure plate 45 is arranged on the side of the knob 43 away from the handle 1. After the operator adjusts the swing head 21 to a specified position by using the knob 43, the pressure plate 45 can be rotated to press the pressure plate 45 onto the knob 43, and the knob 43 is locked by friction force, thereby locking the bending angle of the swing head 21.

[0049] The front end of the swing head 21 is provided with an extension part 23 for accommodating the needle head of the puncture needle 3. The puncture needle 3 of this embodiment is made of elastic material, and can be bent at a certain angle under the guidance of the guide cylinder 2, and then protrude from the guide cylinder 2 under the push of the push component 5 to perform puncture and release operations. The extension part 23 can improve the guiding effect of the guide cylinder 2 on the puncture needle 3, and prevent the needle head of the puncture needle 3 from being inserted into the gap between the hinge units 22.

[0050] The push assembly 5 includes a push rod 51 and a finger ring 52. A central channel 6 is provided inside the handle 1 and the guide cylinder 2. The push rod 51 is inserted into the central channel 6. The puncture needle 3 is detachably connected to the end of the push rod 51. Second finger rings 11 are provided on both sides of the handle 1. When in use, the operator can insert the index finger and middle finger into the second finger ring 11, and then pass the thumb through the finger ring 52. The thumb pushes the push rod 51 to push out the puncture needle 3 for puncture and release.

[0051] An elastic outer sleeve 7 and a pressing ring 8 are provided on the outer side of the guide cylinder 2. A connector 12 is provided on the handle 1 for inserting the outer sleeve 7. A groove 121 is provided inside the connector 13, and an external thread 122 is provided outside. The pressing ring 8 is threadedly connected to the connector 12, and the pressing ring 8 is sleeved on the outer sleeve 7 from the outside, and the outer sleeve 7 is crimped and fixed.

[0052] The outer sleeve 7 is provided with a scale 71 for observation and measurement under a knee arthroscopy.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for releasing the medial collateral ligament under knee arthroscopy, characterized in that: It includes a handle, a guide cylinder and a puncture needle; the guide cylinder is arranged at the front end of the handle, and the puncture needle is arranged inside the guide cylinder; The end of the guide cylinder is provided with a swing head, and the handle is provided with a swing component for controlling the rotation of the swing head and a pushing component for pushing the puncture needle; The swing head is formed by hingedly connecting a plurality of hinge units in sequence, wherein the hinge unit comprises an annular body, and hinge heads are respectively arranged in pairs on both sides of the annular body, and the two pairs of hinge heads on both sides of the annular body are arranged vertically; a pull point fixing piece is arranged on the outer surface of the annular body, and the number of the pull wire fixing pieces is four, and corresponds to the hinge heads; The swing assembly is provided with a pull wire, and the pull wire passes through a pull wire fixing piece on the swing head. The swing assembly pulls the pull wire to control the swing head to swing freely.

2. The device for releasing the medial collateral ligament under knee arthroscopy according to claim 1, characterized in that: The number of the pull wires is four, and the pull wires arranged on the opposite side form a pull wire group, and the two pull wire groups respectively control the swing head to swing left and right or up and down.

3. The device for releasing the medial collateral ligament under knee arthroscopy according to claim 2, characterized in that: The swing assembly includes two knobs and a transmission unit, and the two knobs respectively control two wire groups to zoom in and out through the transmission unit; The transmission unit includes a reel, a bevel gear, and a transmission gear set. The reel is provided with a wire groove. The wire pulling set passes through the wire groove and rotates synchronously with the reel. The bevel gear rotates synchronously with the reel. A gear ring is provided on one side of the knob, and the gear ring drives the bevel gear and the reel to rotate through the transmission gear set, thereby driving one of the pull wires in the pull wire group to contract, and the pull wire on the opposite side to extend, thereby driving the swing head to swing.

4. The medial collateral ligament release device for knee arthroscopy according to claim 3, characterized in that: A groove is provided in the wire trough, a fixing piece is provided on the pull wire, and a protrusion that is inserted into the groove is provided on the fixing piece at a position corresponding to the groove.

5. The device for releasing the medial collateral ligament under knee arthroscopy according to claim 3, characterized in that: The two knobs are respectively arranged at the upper and lower ends of the handle, and a rotating pressure plate is arranged on one side of the knob handle.

6. The device for releasing the medial collateral ligament under knee arthroscopy according to claim 1, characterized in that: The front end of the swing head is provided with an extension part for accommodating the needle head of the puncture needle.

7. The device for releasing the medial collateral ligament under knee arthroscopy according to claim 1, characterized in that: The pushing assembly includes a push rod and a finger ring; A central channel is provided inside the handle and inside the guide cylinder, the push rod is inserted into the central channel, and the puncture needle is detachably connected to the end of the push rod.

8. The medial collateral ligament release device for knee arthroscopy according to claim 1, characterized in that: An elastic outer sleeve and a pressure ring are provided on the outside of the guide cylinder; The handle is provided with a connector for the outer sleeve to be inserted, the pressing ring is threadedly connected to the connector, and the pressing ring is sleeved on the outer sleeve from the outside to crimp and fix the outer sleeve.

9. The medial collateral ligament release device for knee arthroscopy according to claim 1, characterized in that: The outer sleeve is provided with scales.

10. The medial collateral ligament release device for knee arthroscopy according to claim 1, characterized in that: Second finger loops are provided on both sides of the handle.

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