Traction device and method for protecting nerve roots and dural sacs in operation

Abstract

The invention relates to the field of tissue traction devices, and particularly discloses a traction device for protecting nerve roots and dural sacs in an operation and a protection method. The integrated handle, the guide rod, the shifting plate and the inner core form a traction device, the inner core is inserted into the through hole penetrating through the handle, the guide rod and the shifting plate, separation operation can be performed through the shifting plate when an epidural sac or a nerve root adhered to a tissue needs to be stripped in an operation, and the separation operation can be performed through the shifting plate when the epidural sac or the nerve root needs to be separated and protected in the operation. The shifting plate can be obliquely inserted into the bottom of one side of the nerve root or the dural sac, so that the shifting plate is attached to the nerve root or the dural sac, the penetrating hole is aligned with the spine, the inner core is inserted into the penetrating hole, the end of the inner core is positioned and inserted into the spine by rotating the inner core, and the handle and the shifting plate are rotated with the inserting point as a fulcrum. The shifting plate can drive the nerve roots or the dural sacs to move, the situation that surgical instruments damage the dural sacs or the nerve roots is avoided, the device is small in size and occupies small surgical channel space, and operation of the surgical instruments can be prevented from being hindered.

Description

Technical Field

[0001] The present invention belongs to the technical field of tissue traction devices, and in particular relates to a traction device and a protection method for protecting nerve roots and dura mater sac during surgery. Background Art

[0002] When the annulus fibrosus is removed or the nucleus pulposus is removed through spinal endoscopic surgery, in order to avoid damaging the nerve roots or dural sac, the UBE special nerve root retractor can be used. However, the channel opened during the operation is relatively narrow. If the retractor is used to distribute and pull the nerve roots or dural sac, the thick structure of the retractor will take up a lot of surgical channel space, making it difficult to operate the surgical instruments and unable to achieve the purpose of accurately removing the annulus fibrosus or nucleus pulposus during the operation. At the same time, the end of the UBE special nerve root retractor is small, and the nerve roots and dural sac are usually adhered to the surrounding tissues, and need to be separated by instruments and then distributed to the side, but the UBE special nerve root retractor cannot achieve this operation. It can be seen that the structure of the UBE special nerve root retractor cannot effectively meet the use requirements of spinal endoscopic surgery. Therefore, it is necessary to redesign a traction device to meet the protection needs of the nerve roots and dural sac during surgery. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a traction device and a protection method for protecting nerve roots and dura mater sac during surgery, so as to solve the problem that traditional nerve retractors cannot effectively meet the requirements of spinal endoscopic surgery due to structural defects.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A traction device for protecting nerve roots and dural sac during surgery, comprising:

[0006] A handle, wherein the end of the handle is fixedly connected to a guide rod arranged in a frustum shape, and the cross-sectional diameter of the guide rod gradually decreases from one end close to the handle to the other end;

[0007] A shifting plate, which is fixedly mounted on the end of the guide rod and is used to shift nerve roots and dura mater sacs, and a through hole is provided in the middle of the handle, the guide rod and the shifting plate;

[0008] The inner core is inserted into the perforation and abuts against the spine for positioning.

[0009] Preferably, the inner core comprises a positioning rod threadedly connected to the inside of the through hole, an intermediate rod hinged to the end of the positioning rod and a fixing rod hinged to the end of the intermediate rod, wherein the end of the fixing rod is provided with a tip abutting against the spine.

[0010] Preferably, the tip of the end of the fixing rod is a threaded cone.

[0011] Preferably, a rotating rod for driving the positioning rod to rotate is fixedly connected to the upper end of the positioning rod, and the cross-sectional diameter of the rotating rod is larger than the aperture of the through hole.

[0012] Preferably, the end of the positioning rod that does not penetrate into the through hole is engraved with a scale groove for observing the penetration depth of the inner core.

[0013] Preferably, the end of the paddle plate is bent toward one side, and the through hole is arranged on the back side of the bent surface of the paddle plate.

[0014] Preferably, the handle is provided with friction patterns for increasing the friction of the operator's hand.

[0015] A method for protecting nerve roots and dura mater sac during surgery, using a traction device for protecting nerve roots and dura mater sac during surgery, comprising:

[0016] Hold the handle and insert the paddle obliquely into the bottom of the nerve root or dura mater sac so that the paddle fits the nerve root or dura mater sac and the perforation is aligned with the spine;

[0017] Insert the inner core into the perforation, rotate the rotating rod to drive the positioning rod, the intermediate rod and the fixing rod to rotate, so that the end of the fixing rod is positioned and inserted on the spine;

[0018] The handle and the plate are used to move the nerve root or the dura mater sac so that the middle rod and the fixed rod extend out of the perforation. The positioning rod, the middle rod and the fixed rod can rotate relative to each other. The operator can move the nerve root or the dura mater sac to the side a certain distance within the length of the middle rod for protection as needed.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention integrates a handle, a guide rod, a paddle plate and an inner core to form a traction device, and the inner core is inserted into the perforation that runs through the handle, the guide rod and the paddle plate. When it is necessary to peel off the dura mater sac or nerve root adhered to the tissue during surgery, the paddle plate can be used to perform a separation operation. When it is necessary to separate and protect the dura mater sac or nerve root during surgery, the paddle plate can be tilted and inserted into the bottom of one side of the nerve root or dura mater sac, so that the paddle plate fits the nerve root or dura mater sac, and the perforation is aligned with the spine, the inner core is inserted into the perforation, and the inner core is rotated so that the end of the inner core is positioned and inserted on the spine. The handle and the paddle plate are rotated with the insertion point as a fulcrum, and the paddle plate will drive the nerve root or dura mater sac to move, exposing the surgical area, avoiding damage to the dura mater sac or nerve root by surgical instruments. In addition, the device is small in size and occupies less space in the surgical channel, which can avoid interfering with the operation of surgical instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 3 For the present invention Figure 2 A magnified image of the middle part;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the handle of the present invention;

[0025] Figure 5 It is a schematic diagram of the inner core structure of the present invention;

[0026] Figure 6 For the present invention Figure 5 Enlarged view of part B in the middle;

[0027] Figure 7 For the present invention Figure 5 Enlarged view of the middle C area;

[0028] Figure 8 It is a schematic diagram of the rotation positions of the positioning rod, the intermediate rod and the fixed rod of the present invention;

[0029] In the figure: 1. handle; 2. guide rod; 3. dial plate; 4. perforation; 5. positioning rod; 6. rotating rod; 7. scale groove; 8. middle rod; 9. fixing rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] See also Figure 1 - Figure 8 As shown, a traction device for protecting nerve roots and dural sac during surgery comprises:

[0033] A handle 1, wherein the end of the handle 1 is fixedly connected to a guide rod 2 arranged in a frustum shape, and the cross-sectional diameter of the guide rod 2 gradually decreases from one end close to the handle 1 to the other end;

[0034] A dial plate 3, the dial plate 3 is fixedly mounted on the end of the guide rod 2 for dividing the nerve root and the dura mater sac, and a through hole 4 is provided through the middle of the handle 1, the guide rod 2 and the dial plate 3;

[0035] The inner core is inserted into the perforation 4 and abuts against the spine for positioning.

[0036] As can be seen from the above, a traction device is formed by integrating the handle 1, the guide rod 2, the paddle plate 3 and the inner core, and the inner core is inserted into the perforation 4 that passes through the handle 1, the guide rod 2 and the paddle plate 3. When it is necessary to peel off the dura mater sac or nerve root adhered to the tissue during the operation, the paddle plate 3 can be used for separation operation. When it is necessary to separate and protect the dura mater sac or nerve root during the operation, the paddle plate 3 can be tilted and inserted into the bottom of one side of the nerve root or dura mater sac, so that the paddle plate 3 fits the nerve root or dura mater sac, and the perforation 4 is aligned with the spine, the inner core is inserted into the perforation 4, and the inner core is rotated so that the end of the inner core is positioned and inserted on the spine. The handle 1 and the paddle plate 3 are rotated with the insertion point as the fulcrum. The paddle plate 3 will drive the nerve root or dura mater sac to move, exposing the surgical area, avoiding the surgical instrument from damaging the dura mater sac or nerve root, and the device is small in size and occupies less space in the surgical channel, which can avoid interfering with the operation of surgical instruments.

[0037] Embodiment 2:

[0038] See also Figure 1 - Figure 8 As shown, a traction device for protecting nerve roots and dural sac during surgery comprises:

[0039] A handle 1, wherein the end of the handle 1 is fixedly connected to a guide rod 2 arranged in a frustum shape, and the cross-sectional diameter of the guide rod 2 gradually decreases from one end close to the handle 1 to the other end;

[0040] A dial plate 3, the dial plate 3 is fixedly mounted on the end of the guide rod 2 for dividing the nerve root and the dura mater sac, and a through hole 4 is provided through the middle of the handle 1, the guide rod 2 and the dial plate 3;

[0041] The inner core is inserted into the perforation 4 and abuts against the spine for positioning.

[0042] As can be seen from the above, a traction device is formed by integrating the handle 1, the guide rod 2, the paddle plate 3 and the inner core, and the inner core is inserted into the perforation 4 that passes through the handle 1, the guide rod 2 and the paddle plate 3. When it is necessary to peel off the dura mater sac or nerve root adhered to the tissue during the operation, the paddle plate 3 can be used for separation operation. When it is necessary to separate and protect the dura mater sac or nerve root during the operation, the paddle plate 3 can be tilted and inserted into the bottom of one side of the nerve root or dura mater sac, so that the paddle plate 3 fits the nerve root or dura mater sac, and the perforation 4 is aligned with the spine, the inner core is inserted into the perforation 4, and the inner core is rotated so that the end of the inner core is positioned and inserted on the spine. The handle 1 and the paddle plate 3 are rotated with the insertion point as the fulcrum. The paddle plate 3 will drive the nerve root or dura mater sac to move, exposing the surgical area, avoiding the surgical instrument from damaging the dura mater sac or nerve root, and the device is small in size and occupies less space in the surgical channel, which can avoid interfering with the operation of surgical instruments.

[0043] See also Figure 5 - Figure 8As shown, the inner core includes a positioning rod 5 threadedly connected to the inside of the through hole 4, an intermediate rod 8 hinged at the end of the positioning rod 5 and a fixing rod 9 hinged at the end of the intermediate rod 8, and the end of the fixing rod 9 is provided with a tip abutting against the spine.

[0044] Rotating the positioning rod 5 can drive the intermediate rod 8 and the fixed rod 9 to rotate. The tip of the fixed rod 9 will abut against the inside of the spine. Using the connection point between the fixed rod 9 and the spine as a fulcrum, the handle 1 and the dial plate 3 can be rotated to separate and protect the nerve root and the dura mater sac to avoid damage during the operation.

[0045] In order to facilitate the insertion of the rotating fixing rod 9 into the spine, the tip of the end of the fixing rod 9 is a threaded cone, so that the fixing rod 9 can be easily rotated and inserted into the spine.

[0046] See also Figure 1 - Figure 6 As shown, the upper end of the positioning rod 5 is fixedly connected with a rotating rod 6 for driving the positioning rod 5 to rotate, and the cross-sectional diameter of the rotating rod 6 is larger than the aperture of the through hole 4. The user can rotate the rotating rod 6 to drive the positioning rod 5 to rotate, and the rotating rod 6 can also prevent the positioning rod 5 from being completely retracted into the through hole 4.

[0047] See also Figure 6 As shown, the end of the positioning rod 5 that does not penetrate into the through hole 4 is engraved with a scale groove 7 for observing the penetration depth of the inner core. The user can observe the length of the inner core penetrating into the through hole 4 through the scale groove 7, thereby also determining the length of the fixing rod 9 rotating into the spine.

[0048] See also Figure 1 - Figure 4 As shown, in order to facilitate the plate 3 to stably distribute the nerve roots and the dura mater sac, the end of the plate 3 is bent to one side, so that the plate 3 can stably hold the nerve roots and the dura mater sac, and the perforation 4 is arranged on the dorsal side of the curved surface of the plate 3. When the inner core protrudes from the perforation 4, it will not contact the nerve roots and the dura mater sac on one side of the plate 3, thereby effectively protecting the nerve roots and the dura mater sac.

[0049] The handle 1 is provided with friction patterns for increasing the friction of the operator's hand.

[0050] A method for protecting nerve roots and dura mater sac during surgery, using a traction device for protecting nerve roots and dura mater sac during surgery, comprising:

[0051] Holding the handle 1, the plate 3 is tilted and inserted into the bottom of the nerve root or the dura mater sac, so that the plate 3 fits the nerve root or the dura mater sac and the perforation 4 is aligned with the spine;

[0052] Insert the inner core into the through hole 4, rotate the rotating rod 6 to drive the positioning rod 5, the intermediate rod 8 and the fixing rod 9 to rotate, so that the end of the fixing rod 9 is positioned and inserted on the spine;

[0053] The handle 1 and the shift plate 3 are used to move the nerve root or the dura mater sac so that the intermediate rod 8 and the fixed rod 9 extend out of the perforation 4. The positioning rod 5, the intermediate rod 8 and the fixed rod 9 can rotate relative to each other. The operator can shift the nerve root or the dura mater sac to the side for a certain distance within the length of the intermediate rod 8 for protection as needed.

[0054] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0055] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0059] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A traction device for protecting nerve roots and dural sac during surgery, characterized in that: include: A handle (1), wherein the end of the handle (1) is fixedly connected to a guide rod (2) arranged in a frustum shape, and the cross-sectional diameter of the guide rod (2) gradually decreases from one end close to the handle (1) to the other end; A shifting plate (3), the shifting plate (3) being fixedly mounted on the end of the guide rod (2) for shifting nerve roots and the dura mater sac, and a through hole (4) being provided through the middle of the handle (1), the guide rod (2) and the shifting plate (3); An inner core is inserted into the perforation (4) and abuts against the spine for positioning.

2. A traction device for protecting nerve roots and dura mater sac during surgery according to claim 1, characterized in that: The inner core comprises a positioning rod (5) threadedly connected to the inside of the through hole (4), an intermediate rod (8) hinged to the end of the positioning rod (5), and a fixing rod (9) hinged to the end of the intermediate rod (8), wherein the end of the fixing rod (9) is provided with a tip abutting against the spine.

3. A traction device for protecting nerve roots and dural sac during surgery according to claim 2, characterized in that: The tip of the end of the fixing rod (9) is a threaded cone.

4. A traction device for protecting nerve roots and dura mater sac during surgery according to claim 2, characterized in that: The upper end of the positioning rod (5) is fixedly connected to a rotating rod (6) for driving the positioning rod (5) to rotate, and the cross-sectional diameter of the rotating rod (6) is larger than the aperture of the through hole (4).

5. The traction device for protecting nerve roots and dura mater sac during surgery according to claim 2, characterized in that: The end of the positioning rod (5) that does not penetrate into the through hole (4) is engraved with a scale groove (7) for observing the penetration depth of the inner core.

6. The traction device for protecting nerve roots and dura mater sac during surgery according to claim 1, characterized in that: The end of the shift plate (3) is bent toward one side, and the through hole (4) is arranged on the back side of the bent surface of the shift plate (3).

7. The traction device for protecting nerve roots and dura mater sac during surgery according to claim 1, characterized in that: The handle (1) is provided with friction patterns for increasing the friction of the operator's hand.

8. A method for protecting nerve roots and dura mater sac during surgery, using a traction device for protecting nerve roots and dura mater sac during surgery as claimed in any one of claims 1 to 7, characterized in that: include: Holding the handle (1), the plate (3) is tilted and inserted into the bottom of the nerve root or the dura mater sac, so that the plate (3) fits the nerve root or the dura mater sac and the perforation (4) is aligned with the spine; Insert the inner core into the through hole (4), rotate the rotating rod (6) to drive the positioning rod (5), the intermediate rod (8) and the fixing rod (9) to rotate, so that the end of the fixing rod (9) is positioned and inserted on the spine; The handle (1) and the shifting plate (3) are used to move the nerve root or the dura mater sac, so that the intermediate rod (8) and the fixing rod (9) extend out of the perforation (4). The positioning rod (5), the intermediate rod (8) and the fixing rod (9) can rotate relative to each other. The operator can shift the nerve root or the dura mater sac to the side by a certain distance within the length of the intermediate rod (8) for protection as required.

Images