Pulmonary nodule minimally invasive rotary cutter

Abstract

The application discloses a lung nodule minimally invasive rotary cutter and belongs to the technical field of lung nodule surgical device. The rotary cutter comprises a rotary tube, an arc-shaped cutter is arranged on one end of the rotary tube, one end of the arc-shaped cutter is fixed on the rotary tube, an end arc-shaped groove is arranged on the other end of the arc-shaped cutter, an inner wall arc-shaped groove is arranged on the inner wall of the arc-shaped cutter close to the end arc-shaped groove, the end arc-shaped groove and the inner wall arc-shaped groove are communicated, the connecting line of the two ends of the end arc-shaped groove and the inner wall arc-shaped groove is overlapped in the vertical projection, and the two ends are located in the same plane with the central axis of the rotary tube, wire passing holes are arranged at the two ends of the end arc-shaped groove, the wire passing holes pass through the arc-shaped cutter and the rotary tube, a cutting wire is arranged in the wire passing holes, the two ends of the cutting wire pass through the two wire passing holes respectively and are drawn out from the other end of the rotary tube, and the two ends of the cutting wire are detachably connected to the outer side of the end of the rotary tube. The technical scheme is used to improve the surgical effect of lung nodule and reduce postoperative trauma.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lung nodule surgery devices, and particularly relates to a lung nodule minimally invasive rotary cutter. BACKGROUND

[0002] With the rapid development of medical technology, the treatment of lung cancer presents a diversified development trend. In addition to conventional surgical operation, various minimally invasive interventional treatment methods such as heat ablation technology (including microwave ablation and radiofrequency ablation), irreversible electroporation therapy and transvascular interventional embolization are applied in clinical treatment. However, lobectomy is still the most commonly used treatment method at present, and video-assisted thoracic surgery (VATS) is gradually becoming the preferred solution to replace traditional open surgery due to its small trauma.

[0003] It should be particularly pointed out that although the VATS surgery only needs to make a small incision on the body surface, the range of lung tissue resection is not significantly different from that of traditional surgery. This large range of resection often causes significant postoperative lung function decline in patients, which is manifested as reduced activity tolerance, and in severe cases, patients may even have shortness of breath and other discomfort symptoms in daily activities. Thanks to the popularization and application of low-dose CT screening technology, the detection rate of early lung cancer has increased significantly, and statistics show that about 60% of diagnosed cases are stage I patients with tumor diameter less than 3cm. In view of this situation, the satisfaction of patients with VATS surgery continues to decline, and therefore, it is urgent to develop a lung nodule surgery device that can accurately resect lesions and maximize the preservation of lung function, similar to the widely used minimally invasive rotary cutting system in the treatment of breast diseases. Based on this, a lung nodule minimally invasive rotary cutter is proposed. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a lung nodule minimally invasive rotary cutter to improve the surgical effect of lung nodule and reduce postoperative trauma.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A minimally invasive rotary cutting knife for lung nodules includes a rotating tube. One end of the rotating tube has an arc-shaped blade, one end of which is fixed to the rotating tube. The other end of the arc-shaped blade has an end arc-shaped groove. An inner arc-shaped groove is provided on the inner wall of the arc-shaped blade near the end arc-shaped groove. The end arc-shaped groove and the inner arc-shaped groove are connected. The lines connecting the two ends of the end arc-shaped groove and the inner arc-shaped groove coincide in their vertical projections and are both located in the same plane as the central axis of the rotating tube. A wire-passing hole is provided at both ends of the end arc-shaped groove. The wire-passing hole is located inside the arc-shaped blade and the rotating tube, and extends along the arc-shaped blade. The rotating tube extends through the tube along its length. A cutting wire is installed inside the wire-passing hole. Both ends of the cutting wire pass through the two wire-passing holes and exit from the other end of the rotating tube. The two ends of the cutting wire are detachably connected to the outer side of the end of the rotating tube. A housing is fitted onto the outer side of the rotating tube. The rotating tube is rotatably connected to the middle of the housing, and both ends of the rotating tube are located outside the housing. A driving element is installed inside the housing. A driving bevel gear is installed on the output end of the driving element. A first driven bevel gear is installed on the rotating tube. The driving bevel gear and the first driven bevel gear are meshed together.

[0007] Furthermore, a sleeve is fitted onto the rotating tube, with one end of the sleeve located inside the housing and the other end extending out of the housing and positioned near the exit end of the cutting wire. The outer surface of the sleeve is rotatably connected to the housing. A second driven bevel gear is provided on the portion of the sleeve located inside the housing, with the first and second driven bevel gears arranged opposite each other. A threaded sleeve is provided on the outer surface of the end of the rotating tube away from the arc-shaped blade, and the threaded sleeve is threadedly connected to the rotating tube. The exit ends of the cutting wire are detachably connected to the end of the threaded sleeve, which is located near the sleeve. A limiting cylinder is provided at one end of the end, and the limiting cylinder is sleeved on the outside of the sleeve. A plurality of first stops are provided on the inner side of the limiting cylinder, and a plurality of second stops are provided on the outer surface of the sleeve. The plurality of first stops and second stops are in contact with each other. A translation limiting component is provided inside the housing. The translation limiting component is used to drive the drive bevel gear to move vertically, thereby controlling the drive bevel gear to mesh with the first driven bevel gear or the second driven bevel gear. When the drive bevel gear meshes with the second driven bevel gear, the translation limiting component restricts the rotation of the rotating tube.

[0008] Furthermore, a connecting ring is provided at the end of the threaded sleeve, the end of the cutting wire passes through the connecting ring, and a locking block is provided at the end of the cutting wire.

[0009] Further, the translation limiting assembly comprises a translation assembly and a limiting assembly, the translation assembly comprises sliding rods arranged on opposite sides of the driving element, one end of the sliding rod is fixed on the driving element, the other end of the sliding rod penetrates out of the shell and is slidingly connected to the shell, the limiting assembly comprises a connecting plate arranged on the driving element, one end of the connecting plate is fixed on the driving element, the other end of the connecting plate is provided with a limiting rod, a plurality of limiting strips are arranged on the rotating pipe between the first driven bevel gear and the second driven bevel gear, the limiting strips are arranged close to the second driven bevel gear, and a mounting spacing is arranged between the limiting strips and the first driven bevel gear.

[0010] Further, the shell is provided with a perspective window, and the perspective window is arranged opposite to the first driven bevel gear and the second driven bevel gear.

[0011] Further, symmetrically arranged sliding grooves are arranged on the outer surface of the driving element, and symmetrically arranged sliding rails are arranged on the inner wall of the shell, and the sliding rails are slidingly connected in the sliding grooves.

[0012] Further, end plates are arranged on one end of the sliding rods outside the shell, the end plates are fixed on the sliding rods, springs are sleeved on the sliding rods, and the two ends of the springs are respectively fixed on the end plates and the hand-held part, and the springs are used to maintain the meshing contact state of the driving bevel gear and the first driven bevel gear.

[0013] Further, the sleeve and the rotating pipe are rotatably connected to the shell through the first bearing and the second bearing respectively.

[0014] The beneficial effects of the present application are as follows:

[0015] In the technical solution, the cutting wire is stored in the end arc-shaped groove in the initial state, that is, does not interfere with the cutting operation of the arc-shaped knife, and when the arc-shaped knife is cut to the preset depth, the operation of straightening the cutting wire is performed to cut the root of the columnar tissue, and the complete resection of the pulmonary nodule is completed. This cutting method can completely resect the pulmonary nodule, ensure the resection effect, and has smaller trauma and better resection effect compared with traditional surgical resection.

[0016] Other advantages, objects, and features of the present application will be set forth in the following specification, and in part will become apparent to those skilled in the art from the present application, or will be learned from the practice of the present application. The objects and other advantages of the present application can be realized and obtained by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the purpose, technical scheme and beneficial effects of the present application more clear, the present application provides the following drawings for illustration:

[0018] Figure 1 Figure 1 is a perspective view of the lung nodule minimally invasive rotary cutter of the present application;

[0019] Figure 2 Figure 2 is a cross-sectional view of the lung nodule minimally invasive rotary cutter of the present application;

[0020] Figure 3 Figure 3 is a schematic view of the arc-shaped cutter of the lung nodule minimally invasive rotary cutter of the present application;

[0021] Figure 4 Figure 4 is a perspective view of the internal components of the lung nodule minimally invasive rotary cutter of the present application;

[0022] Figure 5 Figure 5 is a perspective view of the housing of the lung nodule minimally invasive rotary cutter of the present application;

[0023] Figure 6 Figure 6 is a perspective view of the threaded sleeve and the limiting cylinder of the lung nodule minimally invasive rotary cutter of the present application;

[0024] Figure 7 Figure 7 is a perspective view of the internal components of the lung nodule minimally invasive rotary cutter of the present application.

[0025] The reference signs in the drawings are as follows:

[0026] 1, mounting portion; 2, sleeve portion; 3, rotating tube; 4, arc-shaped cutter; 5, end arc-shaped slot; 6, inner wall arc-shaped slot; 7, cutting wire; 8, hand-held portion; 9, driving element; 10, driving bevel gear; 11, first bearing; 12, first driven bevel gear; 13, sleeve; 14, second driven bevel gear; 15, second bearing; 16, second stop bar; 17, threaded sleeve; 18, limiting cylinder; 19, first stop bar; 20, connecting ring; 21, sliding rod; 22, spring; 23, sliding rail; 24, clamping block; 25, end plate; 26, connecting plate; 27, limiting rod; 28, limiting bar; 29, perspective window. DETAILED DESCRIPTION

[0027] As Figures 1-7As shown, a lung nodule minimally invasive rotary cutter includes a rotating tube 3, one end of the rotating tube 3 is provided with an arc-shaped cutter 4, the structure of the arc-shaped cutter 4 can be set according to the actual situation, in the specific embodiment, the arc-shaped cutter 4 includes a hollow C-shaped part, the structure of the C-shaped part can be obtained by cutting a notch on the hollow columnar structure, therefore, the C-shaped part has two cutting surfaces, the cutting part (thin thickness, can cut tissue) is arranged on one cutting surface or both cutting surfaces of the C-shaped part, the specific structure of the arc-shaped cutter 4 in the technical solution can be obtained; one end of the arc-shaped cutter 4 is fixed on the rotating tube 3, the other end of the arc-shaped cutter 4 is provided with an end arc-shaped groove 5, an inner wall arc-shaped groove 6 is arranged on the inner wall of the arc-shaped cutter 4 close to the end arc-shaped groove 5, the end arc-shaped groove 5 and the inner wall arc-shaped groove 6 are communicated, the connecting line of the two ends of the end arc-shaped groove 5 and the inner wall arc-shaped groove 6 is overlapped in the vertical projection, and both are located in the same plane with the central axis of the rotating tube 3, the two ends of the end arc-shaped groove 5 are both provided with a wire passing hole, the wire passing hole is arranged in the interior of the arc-shaped cutter 4 and the rotating tube 3, and is arranged penetratingly along the length direction of the arc-shaped cutter 4 and the rotating tube 3, and a cutting wire 7 (a small diameter steel wire) is arranged in the wire passing hole, the two ends of the cutting wire 7 pass through the two wire passing holes respectively, and are drawn out from the other end of the rotating tube 3, the two ends of the cutting wire 7 are detachably connected to the outer side of the end of the rotating tube 3, a shell is sleeved on the outer side of the rotating tube 3, the rotating tube 3 is rotationally connected to the middle part of the shell, and the two ends of the rotating tube 3 are located outside the shell, a driving element 9 (an electric motor or a micro rotary motor) is arranged in the interior of the shell, a driving bevel gear 10 is arranged on the output end of the driving element 9, a first driven bevel gear 12 is arranged on the rotating tube 3, and the driving bevel gear 10 and the first driven bevel gear 12 are arranged in meshing.

[0028] The working principle of the above technical solution is as follows:

[0029] Firstly, the rotating tube 3 is rotated by the driving element 9, and then the rotary arc-shaped cutter 4 is rotated, and then the arc-shaped cutter 4 performs columnar cutting on the lung tissue, until the lung nodule to be removed is located in the columnar tissue to be removed, it is not difficult to understand that the columnar tissue to be removed is located in the interior of the rotating tube 3, then the operator pulls the two ends of the cutting wire 7 to make the cutting wire 7 straight, at this time, the cutting wire 7 in the end arc-shaped groove 5 moves outward through the inner wall arc-shaped groove 6, until it is located in the middle part of the rotating tube 3 and is in a straight state, in the process of the cutting wire 7 straight movement, one half of the root of the columnar tissue is cut, then the rotating tube 3 is rotated by the driving element 9, and then the straight cutting wire 7 is rotated, and then the other half of the root of the columnar tissue is cut, so that the columnar tissue is separated from the remaining lung tissue, at this time, the rotating tube 3 is drawn out, so that the columnar tissue with the lung nodule is taken out, and then the complete rotary cutting operation of the lung nodule is completed.

[0030] In the technical solution, the cutting wire 7 is stored in the end arc-shaped slot 5 in the initial state, that is, it does not interfere with the cutting operation of the arc-shaped knife 4, when the arc-shaped knife 4 is cut to the preset depth, the cutting wire 7 is straightened to cut the root of the columnar tissue, and then the complete resection of the pulmonary nodule is completed. This cutting method can completely resect the pulmonary nodule, ensure the resection effect, and has smaller trauma compared with the traditional surgical resection. In the technical solution, the cutting wire 7 can not only cut the root of the columnar tissue, but also is located at the middle position of the rotating pipe 3, can block the outward sliding of the internal columnar tissue, and can avoid the problem that the internal columnar tissue falls out when the rotating pipe 3 is pulled out.

[0031] It should be noted that the end arc-shaped slot 5 is arranged to facilitate the storage and placement of the cutting wire 7, and the inner wall arc-shaped slot 6 is arranged to facilitate the outward movement of the cutting wire 7 when it is straightened. Of course, the end arc-shaped slot 5 and the inner wall arc-shaped slot 6 can be provided with a blocking piece to make the surface of the arc-shaped knife 4 flat, and the blocking piece will not interfere with the straightening movement of the cutting wire 7. The blocking piece is not described in detail here.

[0032] In an implementable manner, the rotating pipe 3 is sleeved with a sleeve 13, one end of the sleeve 13 is located in the housing, the other end of the sleeve 13 penetrates out of the housing and is located close to the penetrating end of the cutting wire 7, the outer surface of the sleeve 13 is rotationally connected to the housing, the part of the sleeve 13 located in the housing is provided with a second driven bevel gear 14, the first driven bevel gear 12 and the second driven bevel gear 14 are oppositely arranged, a threaded sleeve 17 is arranged on the outer surface of the end of the rotating pipe 3 away from the arc-shaped knife 4, the threaded sleeve 17 is threadedly connected to the rotating pipe 3, and the penetrating end of the cutting wire 7 is detachably connected to the end of the threaded sleeve 17, a limiting cylinder 18 is arranged on one end of the threaded sleeve 17 close to the end of the sleeve 13, the limiting cylinder 18 is sleeved and arranged outside the sleeve 13, a plurality of first blocking strips 19 are circumferentially arranged on the inner side of the limiting cylinder 18, a plurality of second blocking strips 16 are circumferentially arranged on the outer surface of the sleeve 13, the plurality of first blocking strips 19 and the second blocking strips 16 are arranged in contact with each other, and the inside of the housing is provided with a translation limiting assembly, which drives the driving bevel gear 10 to move vertically, thereby controlling the driving bevel gear 10 to mesh with the first driven bevel gear 12 or the second driven bevel gear 14, and when the driving bevel gear 10 meshes with the second driven bevel gear 14, the translation limiting assembly limits the rotation of the rotating pipe 3.

[0033] The principle of the above technical solution is as follows:

[0034] When the driving element 9 drives the first driven bevel gear 12 to rotate, and in turn drives the rotating tube 3 and the arc-shaped knife 4 to rotate, to the preset cutting depth (the cutting depth can be determined by the CT and other imaging components, and at the same time, the sleeve 13 and other components rotate with the rotating tube 3), at this time, the driving element 9 is driven to move by the translation limiting component, and in turn drives the driving bevel gear 10 to move to the second driven bevel gear 14 until meshing, and at the same time, the rotation of the rotating tube 3 is limited, so the rotation of the second driven bevel gear 14 will drive the sleeve 13 to rotate, and under the action of the first stop bar 19 and the second stop bar 16, the sleeve 13 and the limiting cylinder 18 cannot rotate relative to each other, but can move up and down, so when the sleeve 13 drives the limiting cylinder 18 to rotate, it will drive the threaded sleeve 17 to rotate, and at this time the rotating tube 3 does not rotate, so the threaded sleeve 17 will rotate while moving upwards, and in turn the threaded sleeve 17 drives the end of the cutting wire 7 to move upwards, and in turn the cutting wire 7 is straightened, and after being straightened, the cutting wire 7 can be kept straight due to the self-locking of the thread, and in turn the subsequent operation of cutting the end of the columnar tissue by the cutting wire 7 can be performed.

[0035] This arrangement cleverly completes the operations of rotating cutting by the arc-shaped knife 4, straightening the cutting wire 7, and driving the cutting wire 7 to rotate to cut the root of the columnar tissue by one driving element 9, and at the same time, compared with the manual straightening method, the cutting wire 7 is straightened by this method, so that the straightening degree of the cutting wire 7 is large, and the straightening process is relatively linear, that is, the cutting speed of the root of the columnar tissue is stable, the cutting effect is good, and the medical staff only needs to use both hands to ensure the stability of the shell, the operation is more simple and reliable, and at the same time, the stability of the device as a whole is higher (manual straightening or manual rotation of the threaded sleeve 17 to straighten, in the process of manual force, the device as a whole will shake or move, which is easy to cause the arc-shaped knife 4 to move in the lung tissue, causing secondary injury to the patient).

[0036] In an implementable mode, the end of the threaded sleeve 17 is provided with a connecting ring 20, the end of the cutting wire 7 is arranged through the connecting ring 20, and the end of the cutting wire 7 is provided with a clamping block 24, the clamping block 24 and the end of the cutting wire 7 are detachably connected, the end of the cutting wire 7 can be prevented from slipping out of the clamping block 24 by knotting the end of the cutting wire, and it is understood that when the threaded sleeve 17 rotates, the rotating tube 3 does not rotate, that is, the cutting wire 7 is twisted, and the twisting can affect the components placed in the rotating tube 3, such as the positioning needle, however, in actual use, since the diameter of the rotating tube 3 is small, the degree of twisting of the cutting wire 7 is small, and the straightening operation can be realized, therefore, no more treatment is made, of course, preferably, a relatively arranged semicircular through slot can be arranged on the connecting ring 20, the width of the clamping block 24 is greater than the width of the semicircular through slot, that is, when the threaded sleeve 17 rotates, the cutting wire 7 can slide in the semicircular through slot for a certain distance, and then is not twisted, therefore, the setting mode can also eliminate or reduce the twisting problem of the cutting wire 7, of course, the connecting ring 20 can be rotatably connected to the threaded sleeve 17, the rotatable connection mode can be realized by the cooperation of a bearing or a groove and a protrusion, and here, no more redundant description is made.

[0037] In an implementable mode, the translation limiting assembly includes a translation assembly and a limiting assembly, the translation assembly includes sliding rods 21 arranged on the opposite sides of the driving element 9, one end of the sliding rod 21 is fixed to the driving element 9, the other end of the sliding rod 21 passes out of the shell and is slidably connected to the shell, the limiting assembly includes a connecting plate 26 arranged on the driving element 9, one end of the connecting plate 26 is fixed to the driving element 9, the other end of the connecting plate 26 is provided with a limiting rod 27, a plurality of circumferentially distributed limiting strips 28 are arranged on the rotating tube 3 between the first driven bevel gear 12 and the second driven bevel gear 14, the limiting strips 28 are arranged close to the second driven bevel gear 14, and the limiting strips 28 and the first driven bevel gear 12 are provided with a mounting spacing.

[0038] The working principle of the above technical scheme is as follows:

[0039] When the driving bevel gear 10 and the first driven bevel gear 12 are engaged, the limiting rod 27 is located below the limiting strip 28 at this time, when the driving bevel gear 10 and the second driven bevel gear 14 are in contact, the limiting rod 27 is located between the adjacent limiting strips 28, that is, the sliding rod 21 can be operated by the fingers of the operator to drive the movement of the driving element 9, thereby changing the vertical position of the driving bevel gear 10, so that the driving bevel gear 10 moves towards the second driven bevel gear 14, and in the process of the driving bevel gear 10 moving towards the second driven bevel gear 14, the connecting plate 26 and the limiting rod 27 move together with the driving element 9, thereby making the limiting rod 27 located between the adjacent limiting strips 28, thereby limiting the rotation of the rotating pipe 3, that is, through the coordinated linkage, the output object of the driving element 9 is changed, and the rotation corresponding to the original driving is limited, and the structure is simple and ingenious.

[0040] In an implementable manner, the shell is provided with a perspective window 29 (which can be made of transparent glass or other materials), and the perspective window 29 is arranged opposite to the first driven bevel gear 12 and the second driven bevel gear 14. The perspective window 29 is arranged to facilitate the operator to observe whether the limiting column can enter between the adjacent limiting strips 28, so as to avoid abutment interference, and also facilitates the adjustment of the position and improves the effect of the limiting rod 27 entering the limiting strip 28.

[0041] In an implementable manner, the outer surface of the driving element 9 is symmetrically provided with a sliding groove, and the inner wall of the shell is provided with a sliding rail 23 which is slidingly connected in the sliding groove, so as to ensure that the driving element 9 can only move and cannot rotate, thereby ensuring the driving effect.

[0042] In an implementable manner, the end plates 25 are arranged on one end of the sliding rod 21 outside the shell, the end plates 25 are fixed on the sliding rod 21, and the spring 22 is sleeved on the sliding rod 21, the two ends of the spring 22 are fixed on the end plates 25 and the hand-held part 8 respectively, and the spring 22 is used to maintain the engagement and contact state of the driving bevel gear 10 and the first driven bevel gear 12. The spring 22 can ensure that the driving bevel gear 10 acts on the first driven bevel gear 12 in the normal state, so as to ensure the engagement and driving effect. When it is necessary to change the position of the driving element 9, the operator only needs to push the end plate 25 upwards to overcome the resistance of the spring 22.

[0043] In an implementable manner, the sleeve 13 and the rotating pipe 3 are rotatably connected to the shell through the first bearing 11 and the second bearing 15 respectively, and the prior art will not be described in detail here.

[0044] In the technical solution, the shell comprises a sleeve joint part 2, a mounting part 1 and a hand-held part 8, the inner wall of the sleeve joint part 2 is attached to the outer wall of the rotating pipe 3, which ensures the centering of the rotating pipe 3 and avoids the deflection of the rotating pipe 3, the mounting part 1 is used to mount components such as the driving element 9, the driving bevel gear, the first driven bevel gear 12 and the second driven bevel gear 14, and the hand-held part 8 is convenient for the operator to hold during the operation, and the specific shape is shown in Figure 1 , which will not be described in detail here.

[0045] It is not difficult to understand that in the technical solution, the main target is the structure of the rotary cutter, and the circuit part and the control system part involved can be realized by using the existing technology, which will not be described in detail here. Preferably, in order to improve the cutting effect of the cutting wire 7, the driving assembly can be arranged on the threaded sleeve 17, specifically, the driving assembly drives the motor and the driving wheel, and then the steel wire is wound on the driving wheel, so as to drive the steel wire to rotate reciprocatingly to cut the lung tissue; of course, the driving element 9 in the application can also be controlled to reverse, driving the end of the steel wire to move up and down reciprocatingly, and in the process of reciprocating movement, the operator controls the rotating pipe 3 to rotate, thereby controlling the contact position of the steel wire with the root of the columnar tissue, and then cutting off the root of the columnar tissue in the process of tensioning the steel wire. In addition, high-frequency power can be connected to both ends of the steel wire to heat the steel wire for cutting. Therefore, the lung tissue is cut by the steel wire, and the working principle of the high-frequency electric knife in the prior art can be referred to, which will not be described in detail here.

[0046] It should be noted that the technical solution should also include the following steps when actually used:

[0047] First, the position of the pulmonary nodule is determined by CT, and the pulmonary nodule positioning needle is punctured and fixed on the pulmonary nodule under the guidance of CT; then, under the guidance of the pulmonary nodule positioning needle, a surgical channel is established by a puncture sleeve; finally, the rotating pipe 3 in the technical solution is inserted into the puncture sleeve to cut off the pulmonary nodule. It is not difficult to understand that the hemostasis operation in the cutting process is the existing technology (such as the cutting and hemostasis technology of the electric knife in the prior art, and of course, the hemostasis operation can be performed after cutting, etc., which can be selected and operated by those skilled in the art according to the actual situation), and the application mainly aims at the structure of the rotary cutting part of the pulmonary nodule, which will not be described in detail here.

[0048] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the application and not to limit it. Although the application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the application.

Claims

1. A minimally invasive rotary cutting knife for lung nodules, characterized in that: The device includes a rotating tube, one end of which is provided with an arc-shaped blade. One end of the arc-shaped blade is fixed to the rotating tube. The other end of the arc-shaped blade is provided with an end arc-shaped groove. An inner wall arc-shaped groove is provided on the inner wall of the arc-shaped blade near the end arc-shaped groove. The end arc-shaped groove and the inner wall arc-shaped groove are connected. The lines connecting the two ends of the end arc-shaped groove and the inner wall arc-shaped groove coincide in their vertical projections and are both located in the same plane as the central axis of the rotating tube. Wire-passing holes are provided at both ends of the end arc-shaped groove. These wire-passing holes are located inside the arc-shaped blade and the rotating tube, and extend along the length of the arc-shaped blade and the rotating tube. The rotating tube is configured to pass through the wire through the hole. A cutting wire is provided inside the wire through hole. The two ends of the cutting wire pass through the two wire through holes respectively and exit from the other end of the rotating tube. The two ends of the cutting wire are detachably connected to the outer side of the end of the rotating tube. A housing is sleeved on the outer side of the rotating tube. The rotating tube is rotatably connected to the middle of the housing, and both ends of the rotating tube are located outside the housing. A driving element is provided inside the housing. A driving bevel gear is provided on the output end of the driving element. A first driven bevel gear is provided on the rotating tube. The driving bevel gear and the first driven bevel gear are meshed together. A sleeve is fitted onto the rotating tube. One end of the sleeve is located inside the housing, and the other end of the sleeve extends out of the housing and is positioned near the exit end of the cutting wire. The outer surface of the sleeve is rotatably connected to the housing. A second driven bevel gear is provided on the portion of the sleeve located inside the housing. The first and second driven bevel gears are arranged opposite each other. A threaded sleeve is provided on the outer surface of the end of the rotating tube away from the arc-shaped blade. The threaded sleeve is threadedly connected to the rotating tube, and the exit end of the cutting wire can be detachably connected to the end of the threaded sleeve. The threaded sleeve is located near the end of the sleeve. A limiting cylinder is provided at one end of the sleeve, and the limiting cylinder is sleeved on the outside of the sleeve. A plurality of first stop bars are provided on the inner side of the limiting cylinder, and a plurality of second stop bars are provided on the outer surface of the sleeve. The plurality of first stop bars and second stop bars are in contact with each other. A translation limiting component is provided inside the housing. The translation limiting component is used to drive the drive bevel gear to move vertically, thereby controlling the drive bevel gear to mesh with the first driven bevel gear or the second driven bevel gear. When the drive bevel gear meshes with the second driven bevel gear, the translation limiting component restricts the rotation of the rotating tube.

2. The minimally invasive rotary cutting knife for lung nodules according to claim 1, characterized in that: The threaded sleeve has a connecting ring at its end, the end of the cutting wire passes through the connecting ring, and the end of the cutting wire has a locking block.

3. The minimally invasive rotary cutting knife for lung nodules according to claim 1, characterized in that: The translational limiting assembly includes a translational component and a limiting component. The translational component includes a sliding rod disposed on the opposite side of the driving element. One end of the sliding rod is fixed to the driving element, and the other end of the sliding rod extends out of the housing and is slidably connected to the housing. The limiting component includes a connecting plate disposed on the driving element. One end of the connecting plate is fixed to the driving element, and the other end of the connecting plate is provided with a limiting rod. A plurality of circumferentially distributed limiting strips are provided on the rotating tube between the first driven bevel gear and the second driven bevel gear. The limiting strips are disposed close to the second driven bevel gear, and there is an installation gap between the limiting strips and the first driven bevel gear.

4. The minimally invasive rotary cutting knife for lung nodules according to claim 3, characterized in that: The housing is provided with a viewing window, which is positioned directly opposite the first driven bevel gear and the second driven bevel gear.

5. The minimally invasive rotary cutting knife for lung nodules according to claim 3, characterized in that: The outer surface of the driving element is symmetrically provided with grooves, and the inner wall of the housing is symmetrically provided with slide rails, which are slidably connected to the grooves.

6. The minimally invasive rotary cutting knife for lung nodules according to claim 3, characterized in that: Each sliding rod has an end plate on one end located outside the housing. The end plate is fixed to the sliding rod, and a spring is sleeved on the sliding rod. The two ends of the spring are fixed to the end plate and the hand-held part, respectively. The spring is used to maintain the meshing contact state of the drive bevel gear and the first driven bevel gear.

7. The minimally invasive rotary cutting knife for lung nodules according to claim 3, characterized in that: The sleeve and the rotating tube are rotatably connected to the housing via the first bearing and the second bearing, respectively.

Images