Expandable UBE working channel

Abstract

The utility model relates to the technical field of medical instruments, and discloses an expandable UBE working channel. Comprising a first dilation piece, a second dilation piece and an opening mechanism, the opening mechanism can drive the first dilation piece and the second dilation piece to be attached to form a first surgical operation space, and the opening mechanism can drive the first dilation piece and the second dilation piece to be separated to form a second surgical operation space; one end of the second dilation piece is provided with an overhanging part, and the overhanging part is connected with a traction part which extends towards one side of the second dilation piece and in the direction away from the first dilation piece. The UBE working channel can flexibly adjust the operation space in the operation process, the situation that paravertebral muscular tissue hinders operation tool entering and exiting and fusion cage implanting is effectively avoided, meanwhile, the water outlet smoothness is improved, and therefore it is ensured that the visual field under the endoscope is clear, and hydrops in muscle gaps are prevented. And the traction part on the second expansion piece can assist an operator in flexibly pulling nerves without assistance of an assistant, so that the safety and accuracy of an operation are improved, and the nervous tissues of a patient are protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field, especially a kind of expandable UBE working channel. BACKGROUND

[0002] With the rapid development of minimally invasive technology, the minimally invasive technology represented by spinal endoscope has been widely used in clinical. Spinal endoscopic technique is a minimally invasive technique developed earlier in spinal surgery, which establishes a minimally invasive working channel with the help of natural anatomic space and relieves nerve compression compared with traditional open surgery.

[0003] UBE technology is the abbreviation of lumbar minimally invasive unilateral double-channel endoscopic technique. It is suitable for degenerative lesions of cervical vertebra, thoracic vertebra and lumbar vertebra, such as lumbar disc herniation, lumbar spinal stenosis and lumbar instability. UBE decompression requires two small incisions, one about 5-6mm for arthroscopic insertion and continuous saline flushing, and the other about 8-10mm for instrument access and saline outflow.

[0004] In UBE surgery, paravertebral muscle tissue in the two incisions is prone to accumulate at the incision, making muscle tissue an obstacle to the entry and exit of surgical tools and the implantation of fusion cages, thereby affecting the smoothness of the operator's operation and reducing the efficiency of the operation. Moreover, muscle tissue can reduce the smoothness of water outflow from the surgical port, which can cause some blood, yellow ligament, nucleus pulposus and other small debris in the surgical port to be unable to be discharged outside in time, thereby affecting the clarity of the visual field under the endoscope. In addition, poor water outflow can also cause abnormal increase of water pressure in the spinal canal, and the water originally discharged outward will penetrate into the muscle tissue gap, causing hydrops in the muscle gap of the patient, thereby affecting the postoperative recovery of the patient.

[0005] In addition, in UBE surgery, especially during critical steps such as treatment of spinal canal, intervertebral space or fusion cage placement, the operator needs to rely on the assistant to use a nerve root retractor for nerve traction protection during the operation process, which not only increases the difficulty of cooperation of the surgical team, but also increases the risk of nerve injury due to improper cooperation. UTILITY MODEL CONTENT

[0006] The technical problem to be solved by the utility model is that in UBE surgery, paravertebral muscle tissue in the two incisions is prone to accumulate at the incision, hindering the entry and exit of surgical tools and the implantation of fusion cages, and reducing the smoothness of water outflow from the surgical port; and in UBE surgery, the operator needs to rely on the assistant to use a nerve root retractor for nerve traction protection during the operation process.

[0007] In order to solve the above technical problems, the utility model provides a kind of expandable UBE working channel, including first expansion piece, second expansion piece and opening mechanism, opening mechanism is connected with first expansion piece and second expansion piece respectively, opening mechanism can drive first expansion piece and second expansion piece to adhere to form first surgical operation space, opening mechanism can drive first expansion piece and second expansion piece to separate to form second surgical operation space;Second expansion piece one end has overhanging portion extending along the length direction of second expansion piece, overhanging portion is connected with the direction of extending to the side of second expansion piece and away from first expansion piece pull part.

[0008] Preferably, the cross section of the first expansion piece and the second expansion piece is semicircular, and the cross section radius of the first expansion piece and the second expansion piece is equal.

[0009] Preferably, the outer wall of the first expansion piece is provided with a first threaded portion, and the outer wall of the second expansion piece is provided with a second threaded portion.

[0010] Preferably, the outer wall of the first expansion piece is uniformly and spacedly provided with a first protrusion, and the outer wall of the second expansion piece is uniformly and spacedly provided with a second protrusion.

[0011] Preferably, the opening mechanism comprises a first transmission arm and a second transmission arm, the first transmission arm is fixedly connected with the outer side wall of the first expansion piece, the second transmission arm is fixedly connected with the outer side wall of the second expansion piece, and the first transmission arm and the second transmission arm are hinged through a hinge shaft.

[0012] Preferably, the opening mechanism further comprises a locking mechanism, and the locking mechanism is used for locking the rotation angle between the first transmission arm and the second transmission arm.

[0013] Preferably, the locking mechanism comprises a rack, the rack is arc-shaped and one end is fixedly installed on the second transmission arm, a through hole is formed in the first transmission arm for the rack to pass through, and a locking plate is further provided on the first transmission arm, and the locking plate can be engaged with or disengaged from the rack.

[0014] Preferably, the rack is concentric with the rotation axis of the first transmission arm, a sliding groove is formed in the side wall of the first transmission arm along the length direction of the first transmission arm, the sliding groove is communicated with the through hole, and the locking plate is slidingly arranged in the sliding groove.

[0015] The locking mechanism further comprises a spring, one end of the spring is fixedly connected with the side wall of the sliding groove away from the rack, the other end of the spring is fixedly connected with the side wall of the locking plate, and when the locking plate is engaged with the rack, the spring is in a compressed state.

[0016] Preferably, the rack is concentric with the rotation axis of the first transmission arm, a rotating shaft is provided on the first transmission arm, and one end of the locking plate is rotatably arranged on the side wall of the first transmission arm through the rotating shaft.

[0017] The locking mechanism also includes a spring. A connecting part is provided on the side wall of the first transmission arm. The connecting part and the locking plate are respectively set on the opposite side walls of the first transmission arm. One end of the spring is fixedly connected to the connecting part, and the other end of the spring is fixedly connected to the side wall of the locking plate. When the locking plate is attached to the transmission arm and meshes with the rack, the spring is in a stretched state.

[0018] Preferably, the end of the first transmission arm away from the first expansion member is provided with a handle, and the end of the second transmission arm away from the second expansion member is provided with a handle.

[0019] Compared with the prior art, the expandable UBE working channel of this utility model embodiment has the following advantages:

[0020] When the UBE working channel is inserted into the surgical incision, the first and second expansion members fit together to form the first operating space. When it is necessary to pass surgical instruments through the operating space or implant the fusion device, a larger operating space is required. At this time, the opening mechanism drives the first and second expansion members to separate to form the second operating space. The second operating space is larger than the first operating space, thereby effectively preventing the paravertebral muscle tissue in the two incisions from accumulating at the incision site and obstructing the entry and exit of surgical instruments and the implantation of the fusion device. It also helps to improve the smoothness of drainage from the surgical site and avoids poor drainage affecting the clarity of the endoscopic field of view or causing fluid accumulation in the patient's intermuscular spaces.

[0021] While adjusting the size of the surgical operating space, the traction part on the second expander, which extends away from the first expander, can assist the surgeon in flexibly tractioning the patient's nerves. During the operation, there is no need for an assistant to assist the surgeon in operating with nerve root retractors, which improves the safety and precision of the operation, reduces the surgical risk, and protects the patient's nerve tissue from damage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the UBE working channel in the form of two expansion plates in contact, according to an embodiment of this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the UBE working channel with the two expansion plates in the open state according to an embodiment of this utility model. Figure One ;

[0024] Figure 3 This is a schematic diagram of the structure of the UBE working channel with the two expansion plates in the open state according to an embodiment of this utility model. Figure Two .

[0025] In the figure, 1 is the first expansion member; 2 is the second expansion member; 3 is the pulling part; 4 is the first transmission arm; 5 is the second transmission arm; 6 is the hinge shaft; 7 is the first threaded part; 8 is the second threaded part; 9 is the rack; 10 is the locking plate; and 11 is the cantilever part. DETAILED DESCRIPTION

[0026] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0027] In the description of the present application, it should be understood that the term "nerve root retractor" is used in the present application. The nerve root retractor, also known as nerve root retractor, nerve root retractor, orthopedic surgical tool, is used to pull the nerve root out of the intervertebral disc and fix it. It is usually composed of a hook-shaped metal appliance, the hook can pull out the nerve root, so that the doctor can clearly see and operate. The main purpose of using the nerve root retractor is to treat lumbar disc herniation, cervical disc herniation, spinal stenosis and other nerve compression syndromes. During the operation, the doctor uses the nerve root retractor to slowly pull out the nerve root and pull it in the appropriate position, so as to relieve the symptoms of nerve compression. In this way, pain can be relieved, function can be restored and rehabilitation can be promoted.

[0028] As shown in Figures 1 to 3 The expandable UBE working channel of the preferred embodiment of the present application comprises a first expansion piece 1, a second expansion piece 2 and a opening mechanism, the opening mechanism is fixedly connected with the first expansion piece 1 and the second expansion piece 2 respectively, the opening mechanism can drive the first expansion piece 1 and the second expansion piece 2 to adhere to form a first surgical operation space, and the opening mechanism can drive the first expansion piece 1 and the second expansion piece 2 to separate to form a second surgical operation space. By driving the adhesion and separation of the first expansion piece and the second expansion piece through the opening mechanism, the UBE working channel provided by the present application can flexibly adjust the size of the surgical operation space. During the operation, when a larger operation space is needed, the first surgical operation space can be expanded to the second surgical operation space, thereby effectively avoiding the accumulation of paravertebral muscle tissue in the two incisions to the incision to hinder the entry and exit of the surgical tool and the implantation of the fusion cage, and also helping to improve the smoothness of the water outlet of the operation port, avoiding the influence of poor water outlet on the clarity of the visual field under the mirror or causing hydrops in the muscle space of the patient.

[0029] The length of the second expansion piece 2 is greater than the length of the first expansion piece 1, so that one end of the second expansion piece 2 extends along the length direction of the second expansion piece 2 to form a overhanging part, the overhanging part 11 is connected with a pulling part 3 extending to one side of the second expansion piece 2 and away from the first expansion piece 1, the pulling part 3 is used for pulling the nerve of the patient during the operation. While adjusting the size of the surgical operation space, the pulling part 3 extending away from the first expansion piece 1 provided on the second expansion piece 2 can assist the surgeon to flexibly pull the nerve of the patient, so that the assistant does not need to assist the surgeon to operate by using the nerve root retractor during the operation, thereby improving the safety and accuracy of the operation, reducing the risk of the operation, and protecting the nerve tissue of the patient from being damaged.

[0030] Specifically, the material of the first and second expansion members 1 and 2 is 304 medical stainless steel, and the material of the overhanging part 11 and the pulling part 3 is 304 medical stainless steel.

[0031] Specifically, the cross sections of the first and second expansion members 1 and 2 are semicircular, and the cross section radii of the first and second expansion members 1 and 2 are equal. By setting the cross sections of the first and second expansion members 1 and 2 as semicircles with equal radii, a complete circular surgical channel can be formed when the two are fitted together, enhancing structural stability and optimizing the surgical operating space.

[0032] In other embodiments of the present application, the cross sections of the first and second expansion members 1 and 2 are rectangular, and the cross section sizes of the first and second expansion members 1 and 2 are equal. By setting the cross sections of the first and second expansion members 1 and 2 as rectangles with equal sizes, a complete quadrilateral surgical channel can be formed when the two are fitted together, enhancing structural stability.

[0033] Specifically, the outer wall of the first expansion member 1 is provided with a first threaded part 7, and the outer wall of the second expansion member 2 is provided with a second threaded part 8. Preferably, the length of the first threaded part 7 is equal to the distance of the second threaded part 8, and the overhanging part 11 formed at one end of the second expansion member 2 longer than the first expansion member 1 is in the patient's body during surgery, and does not need to be provided with a threaded segment. By providing a threaded part on the outer wall of the expansion member, the friction between the expansion member and the surrounding tissue is enhanced, making the expansion member more stable during surgery and less likely to slip or shift, thereby improving the safety and accuracy of the surgery. At the same time, it is also convenient for the operator to adjust the position or fix it by rotating the expansion member.

[0034] Specifically, the opening mechanism includes a first transmission arm 4 and a second transmission arm 5, the first transmission arm 4 is fixedly connected with the outer side wall of the first expansion member 1, the second transmission arm 5 is fixedly connected with the outer side wall of the second expansion member 2, the middle part of the first transmission arm 4 and the second transmission arm 5 is provided with a connecting ear, the hinge shaft 6 passes through the connecting ear of the first transmission arm 4 and the second transmission arm 5 and is fixed by a locking device, forming a scissor-like movement mechanism, realizing the hinge connection between the first transmission arm 4 and the second transmission arm 5. By fixing the transmission arms to the outer wall of the expansion member through mutual hinge connection, the two expansion members can be driven to move relative to each other when the two transmission arms move relative to each other, thereby realizing flexible adjustment of the surgical operating space, which is convenient for the operator to adjust the size of the operating space according to the surgical needs.

[0035] Specifically, the opening mechanism further includes a locking mechanism for locking the rotation angle between the first transmission arm 4 and the second transmission arm 5. By locking the rotation angle between the first transmission arm 4 and the second transmission arm 5 through the locking mechanism, the stability and fixity of the surgical channel after being expanded to the required size are ensured, further improving the safety and accuracy of the surgery.

[0036] Specifically, the locking mechanism comprises a rack 9, the rack 9 is arc-shaped, the rack 9 is fixedly installed on the second transmission arm 5, the first transmission arm 4 is provided with a through hole for the rack 9 to pass through, and the first transmission arm 4 is further provided with a locking plate 10, the locking plate 10 can be engaged with or disengaged from the rack 9. When the locking plate 10 is engaged with the rack 9, the rotation angle between the first transmission arm 4 and the second transmission arm 5 is locked, and the surgical channel operation space is stabilized in the setting state. When the locking plate 10 is disengaged from the rack 9, the operator can adjust the rotation angle between the first transmission arm 4 and the second transmission arm 5 to adjust the surgical channel operation space, which is simple and efficient.

[0037] Specifically, the rack 9 is concentric with the rotation axis of the first transmission arm 4, so as to avoid the rack 9 from hindering the mutual movement between the first transmission arm 4 and the second transmission arm 5.

[0038] Specifically, the side wall of the first transmission arm 4 is provided with a sliding groove extending along the length direction of the first transmission arm 4, the sliding groove is communicated with the through hole provided on the first transmission arm 4 for the rack to pass through, one end of the locking plate 10 is provided with a sliding block, and the locking plate 10 is slidably arranged in the sliding groove through the sliding block. The locking mechanism further comprises a spring, one end of the spring is fixedly connected with the side wall of the sliding groove away from the rack 9, and the other end of the spring is fixedly connected with the side wall of the locking plate 10. In the state without external interference, the spring is in a compressed state, the side wall of the locking plate 10 is pressed by the spring, the locking plate 10 moves towards the rack 9 to engage the locking plate 10 with the rack 9. When the operator presses down the locking plate 10, the locking plate 10 slides downward to disengage the locking plate 10 from the rack 9 against the elastic force of the spring. At this time, the operator can adjust the rotation angle between the first transmission arm 4 and the second transmission arm 5 to adjust the surgical channel operation space. After the adjustment is completed, the spring drives the locking plate 10 to move upward to reset the locking plate 10 to engage the locking plate 10 with the rack 9.

[0039] Specifically, the first transmission arm 4 is provided with a handle at the end away from the first expansion member 1, and the second transmission arm 5 is provided with a handle at the end away from the second expansion member 2. The handles provided on the two transmission arms improve the convenience and controllability of the surgical operation, so that the operator can easily and accurately control the transmission arms and the expansion members through the handles, and the flexibility of the operation is improved.

[0040] In other embodiments of the present application, the cross sections of the first expansion member 1 and the second expansion member 2 are rectangular, and the cross section sizes of the first expansion member 1 and the second expansion member 2 are equal. The cross sections of the first expansion member 1 and the second expansion member 2 are set as rectangular with equal sizes, and the two expansion members can form a complete quadrilateral surgical channel when they are attached.

[0041] In other embodiments of the present application, the first expansion piece 1 is uniformly spaced on the outer wall of the first expansion piece 1, and the second expansion piece 2 is uniformly spaced on the outer wall of the second expansion piece 2.

[0042] In other embodiments of the present application, the rack 9 is concentric with the rotation axis of the first transmission arm 4, and the first transmission arm 4 is provided with a rotating shaft, and one end of the locking plate 10 is rotatably arranged on the side wall of the first transmission arm 4 through the rotating shaft; the locking mechanism further comprises a spring, and the side wall of the first transmission arm 4 is provided with a connecting portion, the connecting portion and the locking plate 10 are arranged on the opposite two side walls of the first transmission arm 4 respectively, one end of the spring is fixedly connected with the connecting portion, and the other end of the spring is fixedly connected with the locking plate 10, in the state without external force interference, the spring is in the stretched state, under the action of the elastic force of the stretched spring, the locking plate 10 is attached to the side wall of the first transmission arm 4 and is engaged with the rack 9, when the operator presses down the locking plate 10, the locking plate 10 rotates away from the side wall of the first transmission arm 4 against the elastic force of the spring so that the locking plate 10 is separated from the rack 9, at this time, the operator can adjust the rotation angle between the first transmission arm 4 and the second transmission arm 5 to realize the adjustment of the operation channel operation space, after the adjustment is completed, the spring drives the locking plate 10 to rotate reversely to reset to reengage the locking plate 10 with the rack 9.

[0043] The working process of the utility model is: taking the preferred embodiment as an example, before operation, the operator first uses the first transmission arm and the second transmission arm to attach the two expansion pieces, after cutting the operation incision at the preset position of the patient, the UBE working channel provided by the utility model is placed into the incision, at this time, the two expansion pieces are attached to form the first operation space; when the operation space needs to be adjusted according to the actual situation during operation, first make the locking plate slide down against the spring elastic force, at this time, the locking plate releases the locking of the rack, so that the operator can drive the two expansion pieces to separate to form the second operation space through the opening mechanism, by adjusting the relative rotation angle of the two expansion pieces, the operator can freely change the size of the operation operation space, after the adjustment is completed, under the action of the spring, the locking plate moves up to reset the locking of the rack, so as to lock the operation operation space and ensure the stability of the operation channel. While adjusting the relative rotation angle of the two expansion pieces, the operator can use the pulling part arranged on the second expansion piece to flexibly pull and protect the nerve of the patient, which reduces the dependence on the assistant during operation and improves the independence and safety of the operation. After the operation is completed, the operator gradually reduces the opening degree of the two expansion pieces, and removes the expandable UBE working channel from the patient's body through the operation incision.

[0044] In summary, the utility model embodiment provides a kind of expandable UBE working channel, can flexibly adjust surgical operating space in the process of operation, effectively avoid paravertebral muscle tissue obstruction surgical tool access and fusion cage implantation, while improve water smoothness, to ensure that the field of view under the mirror is clear and prevent muscle gap hydrops.This in addition, the pulling portion on the second expansion piece can assist the operator to flexibly pull the nerve, without the assistance of an assistant, improve the safety and accuracy of the operation, reduce the risk, protect the nerve tissue of the patient.

[0045] The above is only the preferred embodiment of the utility model, it should be pointed out that, for the ordinary skill in the art, without departing from the technical principles of the utility model, can make a number of improvements and substitutions, these improvements and substitutions also should be considered as the protection scope of the utility model.

Claims

1. An expandable UBE working channel, characterized by, The first expansion piece (1), the second expansion piece (2) and the opening mechanism, the opening mechanism is connected with the first expansion piece (1) and the second expansion piece (2) respectively, the opening mechanism can drive the first expansion piece (1) and the second expansion piece (2) to adhere to form the first operation space, the opening mechanism can drive the first expansion piece (1) and the second expansion piece (2) to separate to form the second operation space, one end of the second expansion piece (2) has the overhanging part (11) extending along the length direction of the second expansion piece (2), the overhanging part (11) is connected with the pulling part (3) extending to the side of the second expansion piece (2) and away from the first expansion piece (1).

2. An expandable UBE working channel according to claim 1, wherein, The cross section of the first expansion piece (1) and the second expansion piece (2) is semicircular, and the cross section radii of the first expansion piece (1) and the second expansion piece (2) are equal.

3. An expandable UBE working channel according to claim 1, wherein, The outer wall of the first expansion piece (1) is provided with the first threaded part (7), and the outer wall of the second expansion piece (2) is provided with the second threaded part (8).

4. An expandable UBE working channel according to claim 1, wherein, The outer wall of the first expansion piece (1) is uniformly and spacedly provided with the first protrusion, and the outer wall of the second expansion piece (2) is uniformly and spacedly provided with the second protrusion.

5. An expandable UBE working channel according to claim 1, wherein, The opening mechanism comprises the first transmission arm (4) and the second transmission arm (5), the first transmission arm (4) is fixedly connected with the outer side wall of the first expansion piece (1), the second transmission arm (5) is fixedly connected with the outer side wall of the second expansion piece (2), and the first transmission arm (4) and the second transmission arm (5) are hinged through the hinge shaft (6).

6. An expandable UBE working channel according to claim 5, wherein, The opening mechanism further comprises a locking mechanism, and the locking mechanism is used for locking the rotation angle between the first transmission arm (4) and the second transmission arm (5).

7. An expandable UBE working channel according to claim 6, wherein, The locking mechanism comprises a rack (9), the rack (9) is arc-shaped and is fixedly installed at one end of the second transmission arm (5), a through hole is formed in the first transmission arm (4) for the rack (9) to pass through, and a locking plate (10) is further arranged on the first transmission arm (4), and the locking plate (10) can be engaged with or disengaged from the rack (9).

8. An expandable UBE working channel according to claim 7, wherein, The rack (9) is concentric with the rotation axis of the first transmission arm (4), a sliding groove extending along the length direction of the first transmission arm (4) is formed in the side wall of the first transmission arm (4), the sliding groove is communicated with the through hole, and the locking plate (10) is slidingly arranged in the sliding groove. The locking mechanism further comprises a spring, one end of the spring is fixedly connected with the side wall of the sliding groove away from the rack (9), the other end of the spring is fixedly connected with the side wall of the locking plate (10), and when the locking plate (10) is engaged with the rack (9), the spring is in a compressed state.

9. An expandable UBE working channel according to claim 7, wherein, The rack (9) is concentric with the rotation axis of the first transmission arm (4), a rotating shaft is arranged on the first transmission arm (4), and one end of the locking plate (10) is rotationally arranged on the side wall of the first transmission arm (4) through the rotating shaft. The locking mechanism further comprises a spring, a connecting part is arranged on the side wall of the first transmission arm (4), the connecting part is arranged on the opposite side walls of the first transmission arm (4) respectively, one end of the spring is fixedly connected with the connecting part, and the other end of the spring is fixedly connected with the side wall of the locking plate (10); when the locking plate (10) is attached to the transmission arm and meshes with the rack (9), the spring is in a stretched state.

10. An expandable UBE working channel according to any one of claims 5-9, wherein, An end of the first transmission arm (4) away from the first expansion part (1) is provided with a handle, and an end of the second transmission arm (5) away from the second expansion part (2) is provided with a handle.

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