Breast tumor surgery instrument

Abstract

The application discloses a breast tumor surgical instrument, which comprises a handle, a catheter, a rotary cutter and a suction assembly. The handle comprises a shell and a driving assembly and a negative pressure assembly arranged in the shell. One end of the catheter is connected to the handle, and the other end is provided with a sharp part. The catheter is internally defined as a lumen, and the outer peripheral wall of the catheter is provided with a rotary cutting hole and a suction hole communicating with the lumen. The rotary cutting hole is suitable for sucking tumor tissues into the lumen for rotary cutting under the action of the negative pressure assembly, and the suction hole is used for adsorbing normal tissues near the tumor tissues to reduce the damage to the normal tissues in the surgical process. At least part of the rotary cutter is located in the lumen, and the rotary cutter is connected with the driving assembly. The rotary cutter can cut off the tumor tissues sucked into the lumen by the rotary cutting hole under the driving of the driving assembly. The suction assembly is arranged in the lumen and located on the side of the rotary cutter close to the sharp part, which can be used for forming negative pressure at the suction hole to adsorb the normal tissues near the tumor tissues and prevent mis-cutting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical instruments, in particular to a breast tumor surgical instrument. BACKGROUND

[0002] In the clinical treatment field of breast tumors, in one surgical method, a surgeon cuts the breast of a patient and, according to his own experience, uses a scalpel to remove the breast tumor under visual observation and then sutures the wound. This surgical method has low requirements for surgical instruments; however, it relies on the surgical experience of the surgeon and has a large postoperative wound and a long postoperative recovery period. In another surgical method, a small incision is made in the breast of a patient, a catheter of a rotary cutter is inserted into the breast through the small incision, and the breast tumor is removed little by little by using a rotary cutter head at the head of the catheter under the assistance of a transmission device (the transmission device can observe the relative position between the rotary cutter head and the breast tumor in real time). This surgical method is a minimally invasive surgery, has a small surgical incision, and has a fast recovery. However, because the shape of a breast tumor is not a regular sphere or ellipse but can be irregular, some tumors have uneven edges, and some tumors have lobulated structures. Such irregular shapes make it difficult for the rotary cutter to accurately define the boundary between the tumor and normal tissue during the rotary cutting process. Therefore, in the process of removing the tumor, the normal breast tissue is easily cut by mistake. Once the normal tissue is cut by mistake, not only will the patient suffer unnecessary physical damage, but also the surgical trauma and postoperative pain will be increased, and a series of complications such as bleeding, infection, and hematoma formation can be caused, which seriously affect the postoperative recovery and quality of life of the patient. SUMMARY

[0003] The main purpose of the present application is to provide a breast tumor surgical instrument that can effectively remove tumor tissue while avoiding the cutting of normal tissue by mistake.

[0004] To achieve the above-mentioned purpose, the present application provides a breast tumor surgical instrument, comprising:

[0005] a handle comprising a shell and a driving assembly and a negative pressure assembly arranged in the shell;

[0006] a catheter having a sharp portion at one end and being connected to the handle at the opposite end, the catheter defining a lumen inside, and the peripheral wall of the catheter being provided with a rotary cutting hole and a suction hole communicating with the lumen, the suction hole being located between the rotary cutting hole and the sharp portion, and the negative pressure assembly being used to form a negative pressure in the lumen;

[0007] a rotary cutter being at least partially located in the lumen, the rotary cutter being connected to the driving assembly and being used to remove tumor tissue sucked into the lumen through the rotary cutting hole under the driving of the driving assembly;

[0008] An adsorption assembly is arranged in the lumen and located at a side of the rotary cutter close to the pointed part, and is used to form a negative pressure at the adsorption hole.

[0009] In some embodiments, the adsorption assembly comprises a piston body which divides the lumen into an adsorption chamber communicating with the adsorption hole, and the rotary cutting hole is isolated from the adsorption chamber. The piston body is configured to move along the axis of the catheter in the lumen to change the air pressure in the adsorption chamber.

[0010] In some embodiments, the adsorption assembly further comprises a drive spring located in the adsorption chamber and connected to the catheter and the piston body respectively.

[0011] When the rotary cutter moves towards the pointed part, it can push the piston body to move towards the pointed part to compress the drive spring and make the air in the adsorption chamber flow out of the adsorption hole. When the drive spring is compressed and the rotary cutter moves away from the pointed part, the drive spring pushes the piston body to move away from the pointed part to make external air flow into the adsorption chamber through the adsorption hole.

[0012] In some embodiments, the rotary cutter comprises a drive rod and a cutter body. One end of the drive rod is connected to the cutter body, and the opposite end is connected to the drive assembly. The side of the cutter body away from the piston body is provided with a cutting edge. Along the axis of the catheter, the cutter body moves from the side close to the pointed part to the side away from the pointed part and cuts off the tumor tissue.

[0013] In some embodiments, the side of the cutter body away from the piston body is provided with a recess. The end of the drive rod close to the piston body is inserted into the center of the recess and connected to the cutter body. The recess located at the outer periphery of the drive rod is used to store the cut-off tumor tissue.

[0014] In some embodiments, the cutter body is provided with a through hole penetrating through along the axis of the catheter. The through hole communicates with the recess. The negative pressure assembly sucks out the tumor tissue stored in the recess through the through hole.

[0015] In some embodiments, the pointed part comprises an inclined surface, and the adsorption hole penetrates through the inclined surface.

[0016] The piston body is provided with a blocking protrusion. The piston body can move to a first position where the blocking protrusion blocks the adsorption hole, and a second position where the blocking protrusion is separated from the adsorption hole.

[0017] In some embodiments, the catheter is internally provided with a stepped portion, the stepped portion comprising an annular stepped surface facing the piston body, the driving spring is configured to drive the piston body to abut against the annular stepped surface.

[0018] In some embodiments, the catheter is internally provided with a stepped portion, the stepped portion comprising an annular stepped surface facing the piston body, the piston body is movable to abut against the annular stepped surface;

[0019] The annular stepped surface is provided with a first magnetic member, the piston body is provided with a second magnetic member, the first magnetic member and the second magnetic member are mutually attracted, the rotary cutter is provided with a third magnetic member, the third magnetic member and the second magnetic member are mutually attracted;

[0020] When the rotary cutter moves towards the direction close to the thorn portion, the rotary cutter can push the piston body to move towards the direction close to the thorn portion, so that the air in the adsorption chamber is guided out of the adsorption hole; when the rotary cutter moves away from the thorn portion, the third magnetic member attracts the second magnetic member, so that the piston body moves away from the thorn portion to abut against the annular stepped surface, and the second magnetic member and the first magnetic member are attracted to each other.

[0021] In some embodiments, the adsorption hole comprises a plurality of micro-holes distributed circumferentially around the axis of the catheter, each of the micro-holes communicates with the lumen.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] In the technical solution of the present application, before the rotary cutter resects the breast tumor, the normal tissue near the tumor tissue can be first adsorbed by the adsorption hole, and then the tumor tissue is adsorbed by the rotary hole, so that the normal tissue and the tumor tissue are both positioned in the catheter. In the subsequent operation process, the part of the tumor tissue close to the rotary hole is sucked into the rotary hole and resected by the rotary cutter, and after the part of the tumor tissue sucked into the rotary hole is resected, the subsequent part continues to be sucked into the rotary hole and then continues to be resected by the rotary cutter, so as to ultimately achieve the resection of the whole breast tumor. In the process of sucking the tumor tissue into the rotary hole, since the normal tissue near the tumor tissue is adsorbed and positioned by the adsorption hole, the tumor tissue will not pull the normal tissue near it and pull the normal tissue into the adsorption hole, effectively reducing the risk of resection of the normal tissue.

[0024] And, due to the normal tissue and the tumor tissue are positioned separately, so that in the process of the tumor tissue is sucked into the rotary cutting hole, there is a certain pulling force between the tumor tissue and the normal tissue adsorbed by the adsorption hole, when the boundary adhesion force between the tumor tissue and the normal tissue is small, the pulling force can effectively separate the tumor tissue and the normal tissue, that is, the part of the breast tumor to be removed is separated from the normal tissue before being sucked into the rotary cutting hole, further preventing the risk of the normal tissue being pulled into the rotary cutting hole and being removed. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, below will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0026] Figure 1 It is a structure schematic diagram of the breast tumor surgical instrument in an embodiment of the present application.

[0027] Figure 2 It is a structure schematic diagram of the breast tumor surgical instrument in an embodiment of the present application.

[0028] Figure 3 It is a first sectional view of the part structure of the breast tumor surgical instrument in an embodiment of the present application along A-A direction in the figure; wherein the rotary cutting knife pushing piston body moves towards the direction close to the thorn part; Figure 2

[0029] Figure 4 It is a second sectional view of the part structure of the breast tumor surgical instrument in an embodiment of the present application along A-A direction in the figure; wherein the piston body abuts against the step part, and the rotary cutting knife moves towards the direction away from the thorn part to remove the tumor tissue; Figure 2

[0030] Figure 5 It is a third sectional view of the part structure of the breast tumor surgical instrument in an embodiment of the present application along A-A direction in the figure; wherein the rotary cutting knife completes the removal of the tumor tissue; Figure 2

[0031] Figure 6 It is a structure schematic diagram of the rotary cutting knife in an embodiment of the present application; wherein the cutter body can include a plurality of cutting edges.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] The breast tumor surgical instrument 100;

[0034] The handle 110;​​​

[0035] catheter 120; sharp portion 121; lumen 122; suction hole 123; rotary cutting hole 124; suction chamber 125; inclined surface 126; step portion 127;

[0036] rotary cutting knife 130; driving rod 131; knife body 132; knife edge 133; concave cavity 134; through hole 135;

[0037] suction assembly 140; piston body 141; driving spring 142.

[0038] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0040] In the related art, when a rotary cutting knife is used for minimally invasive surgery on a breast tumor patient, a catheter is inserted into the breast of the patient, and a rotary cutting hole on the catheter is aligned with the breast tumor. By increasing the negative pressure in the catheter, the part of the breast tumor close to the rotary cutting hole is sucked into the catheter and cut off by the rotary cutting knife in the catheter. After the part of the tumor tissue sucked into the rotary cutting hole is cut off, the subsequent part continues to be sucked into the rotary cutting hole and then cut off by the rotary cutting knife. In this way, the whole breast tumor is cut off. However, the applicant finds that in the process of surgery, the normal tissue near the breast tumor is easily sucked into the rotary cutting hole due to the pulling of the breast tumor during the process of being sucked into the rotary cutting hole, which makes the normal tissue easy to be mistakenly cut off. In order to avoid mistakenly cutting off the normal tissue, under the observation of a perspective device, when the normal tissue is sucked into or about to be sucked into the catheter, an experienced doctor can appropriately reduce the suction force or move the position of the catheter to discharge the normal tissue. However, the above operation makes the boundary part of the tumor adhering to the normal tissue easy to be discharged from the catheter, resulting in tumor residue. In summary, how to fully cut off the breast tumor and reduce the mistaken cutting of the normal tissue becomes a problem to be solved.

[0041] In view of this, please refer to Figures 1 to 6The breast tumor surgical instrument 100 of the present application comprises a handle 110, a catheter 120, a rotary cutter 130 and a suction assembly 140. The handle 110 comprises a shell and a driving assembly and a negative pressure assembly arranged inside the shell. The shell can protect the driving assembly and the negative pressure assembly, ensuring stable operation. In order to ensure the comfort of the doctor's hands during long-time operation, the shell is designed with ergonomics and covered with a non-slip material to reduce hand fatigue. In order to facilitate operation, the handle 110 is provided with a holding groove that conforms to the natural bending radius of the fingers, providing a comfortable grip. The handle 110 can also be provided with buttons for starting the driving assembly and the negative pressure assembly, improving the convenience of operation. The driving assembly can adopt driving modes including but not limited to motor devices, hydraulic devices, pneumatic devices, etc. The negative pressure assembly can adopt devices capable of generating negative pressure including but not limited to vacuum generating devices, pump devices, etc.

[0042] Please refer to Figure 1 The catheter 120 is connected to the handle 110 at one end and provided with a sharp portion 121 at the other end. The sharp portion 121 can be inserted into the tumor tissue through a minimally invasive surgical incision to facilitate tumor removal. Specifically, the catheter 120 defines a lumen 122 inside, and the outer peripheral wall of the catheter 120 is provided with a rotary cutting hole 124 and a suction hole 123 communicating with the lumen 122. The rotary cutting hole 124 is suitable for sucking tumor tissue into the lumen 122 for rotary cutting under the action of the negative pressure assembly, and the suction hole 123 is used to suck normal tissue near the tumor tissue to reduce damage during the operation. The suction hole 123 is located between the rotary cutting hole 124 and the sharp portion 121, and the suction hole 123 and the rotary cutting hole 124 are located on the same side of the outer peripheral wall of the catheter 120. In some embodiments, the suction hole 123 is located in the direction in which the rotary cutting hole 124 points to the sharp portion 121, ensuring that the suction hole 123 can suck normal tissue near the tumor tissue while the rotary cutting hole 124 sucks tumor tissue, preventing normal tissue from being mistakenly cut and improving the accuracy of the operation. It should be noted that the negative pressure assembly is used to form a negative pressure in the lumen 122 to ensure effective suction and removal of the tumor tissue by the rotary cutting hole 124. The negative pressure value can be adjusted according to the operation requirements to ensure flexibility of operation.

[0043] Please refer to Figures 3 to 5 At least part of the rotary cutter 130 is located in the lumen 122, and the rotary cutter 130 is connected with the driving assembly. Thus, the rotary cutter 130 can remove the tumor tissue sucked into the lumen 122 by the rotary cutting hole 124 under the drive of the driving assembly. The removed tumor tissue can be discharged through the catheter 120 under the action of the negative pressure assembly, ensuring the efficiency and cleanliness of the operation. In other words, the negative pressure assembly can form a continuous and stable negative pressure environment in the lumen 122, ensuring that the tumor tissue is sucked in through the rotary cutting hole 124 under the action of the negative pressure, removed and smoothly discharged, avoiding residue.

[0044] The suction assembly 140 is arranged in the lumen 122 and located at one side of the rotary cutter 130 close to the spike portion 121, which can be used to form a negative pressure at the suction hole 123 to suck the normal tissue near the tumor tissue to prevent mis-cutting.

[0045] Please refer to Figures 3 to 5 The suction assembly 140 includes a piston body 141, which divides the lumen 122 into a suction chamber 125 that can communicate with the suction hole 123, and the rotary cutting hole 124 is isolated from the suction chamber 125. Specifically, the rotary cutting hole 124 is separated from the suction chamber 125 and the suction hole 123 by the piston body 141, ensuring that the rotary cutting of the tumor tissue and the suction of the normal tissue are performed independently, improving the accuracy of the operation. Among them, the piston body 141 is configured to move in the axial direction of the catheter 120 within the lumen 122, thereby changing the air pressure in the suction chamber 125, and then the suction hole 123 realizes the suction of the normal tissue. It can be understood that the arrangement of the piston body 141 not only realizes the adjustment of the air pressure in the suction chamber 125, but also plays a role in separating the rotary cutting hole 124 and the suction hole 123, ensuring that the rotary cutting and suction processes do not interfere with each other, further improving the safety and efficiency of the operation.

[0046] It can be understood that, in order to facilitate the assembly of the piston body 141, the catheter 120 includes a first part and a second part, for ease of description, define a plane perpendicular to the through direction of the rotary cutting hole 124 as the mold surface, and the axis of the catheter 120 is located in the mold surface. The mold surface separates the catheter 120 into a first part and a second part, the first part contains the rotary cutting hole 124 and the suction hole 123, and when the suction assembly 140 is installed in the suction chamber 125, the first part and the second part can be connected and fixed by means including but not limited to buckling, welding, etc., to ensure the stability and sealing of the overall structure of the catheter 120.

[0047] In some embodiments, the maximum air pressure in the suction chamber 125 is not greater than the maximum air pressure acting on the rotary cutting hole 124 in the lumen 122, so as to prevent the suction hole 123 from being sucked to the tumor tissue, ensure that only the normal tissue is sucked, and at the same time avoid damaging the normal tissue sucked to the suction hole 123. It should be noted that the negative pressure formed by the negative pressure assembly in the lumen 122 can be constant or dynamically changing, depending on the actual needs during the operation.

[0048] It can be understood that the plane perpendicular to the axis of the catheter 120 is defined as the projection plane, and the outer contour shape of the projection of the catheter 120 formed on the projection plane includes but is not limited to a circular shape, an elliptical shape, and other shapes. The shape of the inner contour of the catheter 120 on the projection plane includes but is not limited to a circular shape, a rectangular shape, a hexagonal shape, and other shapes, and the shape of the inner contour of the catheter 120 can be the same as or different from the shape of the outer contour thereof. The shape and size of the piston body 141 can be adapted to the shape and size of the adsorption chamber 125.

[0049] In some embodiments, the outer surface of the piston body 141 can be covered with a layer of soft and good sealing material, including but not limited to silica gel, to enhance the sealing effect between the piston body 141 and the inner wall of the catheter 120 and reduce the risk of gas leakage. In addition, in order to further improve the flexibility of the breast tumor surgery instrument 100, a sensor can be arranged in the lumen 122 to monitor the pressure change in the lumen 122 in real time and feed back the data to the control system to automatically adjust the negative pressure intensity. The arrangement of the sensor is also beneficial to the maintenance of the breast tumor surgery instrument 100. The sensor can be used to detect the air pressure, flow rate, and other parameters in the lumen 122 and compare them with the factory parameter benchmark to determine whether the connection between the catheter 120 and the negative pressure assembly is abnormal or whether the catheter 120 has a leak or other conditions.

[0050] Please refer to Figures 3 to 5 In some embodiments, the adsorption assembly 140 further includes a driving spring 142 located in the adsorption chamber 125 and connected to the catheter 120 and the piston body 141, respectively. When the coring knife 130 moves towards the sharp portion 121 under the driving of the driving assembly, the coring knife 130 pushes the piston body 141 to move towards the sharp portion 121 as well, which compresses the driving spring 142 and causes the air in the adsorption chamber 125 to be discharged through the adsorption hole 123. This design not only ensures that the risk of normal tissue around the tumor tissue being accidentally sucked during the cutting process is effectively reduced, but also improves the accuracy of the operation and avoids the residual of external air in the adsorption chamber 125 and the entry of the sharp portion 121 into the breast tissue to cause infection. In particular, in the present scheme, the coring knife 130 is used to push the piston body 141 to move, instead of designing other driving structures to push the piston body 141 to move, which reduces the number of parts, improves the compactness of the structure, and reduces the volume of the catheter.

[0051] When the rotary cutter 130 is withdrawn away from the spike portion 121 under the action of the driving assembly, the driving spring 142 gradually releases the elastic force, pushes the piston body 141 to reset towards the direction away from the spike portion 121, and the negative pressure in the suction chamber 125 is restored accordingly, ensuring the continuous suction of normal tissues, reducing the bleeding of the surgical wound, and improving the safety and efficiency of the surgery. Among them, the movement of the piston body 141 towards the spike portion 121 is achieved by the rotary cutter 130, and the movement away from the spike portion 121 is completed by the reset force of the driving spring 142. The two work together to effectively ensure the accurate positioning and dynamic adjustment of the piston body 141 in the suction chamber 125. Compared with the traditional design of additionally setting the driving structure in the lumen 122 and additionally increasing the control button at the handle 110, this scheme simplifies the design, reduces the manufacturing cost, reduces the operation complexity, and improves the surgical efficiency.

[0052] Specifically, before the rotary cutter 130 is inserted into the breast tissue, the driving assembly is first controlled to move the rotary cutter 130 towards the sharp portion 121, so that the piston body 141 is moved towards the sharp portion 121 under the push of the rotary cutter 130, the driving spring 142 is compressed, and the air in the suction chamber 125 is discharged. Subsequently, after other preparations are completed, the sharp portion 121 can be inserted into the breast tissue through a minimally invasive surgical incision and positioned at the tumor site, and it is ensured that the rotary cutting hole 124 is aligned with the tumor tissue and the suction hole 123 is aligned with the normal tissue around the tumor tissue. Then the driving assembly and the negative pressure assembly are started, the driving assembly drives the rotary cutter 130 to retreat away from the sharp portion 121 (at this time, the piston body 141 moves away from the sharp portion 121 under the elastic force of the driving spring 142, and a negative pressure is formed in the suction chamber 125 so that the normal tissue is sucked to the suction hole 123), and the negative pressure assembly applies a negative pressure to the lumen 122, so that the tumor tissue is sucked into and fixed by the rotary cutting hole 124, and the normal tissue around the tumor tissue is sucked by the suction hole 123, ensuring that the tumor tissue is separated from the normal tissue during the rotary cutting process, reducing the risk of mis-cutting. With the continuous retreat of the rotary cutter 130 away from the sharp portion 121, the rotary cutter 130 cuts the tumor tissue through the rotary cutting hole 124. After the corresponding tumor tissue is partially or completely removed, the driving assembly drives the rotary cutter 130 to move towards the sharp portion 121 again, the negative pressure assembly stops applying negative pressure, the piston body 141 is pushed by the rotary cutter 130 to move towards the sharp portion 121, the driving spring 142 is compressed again, the negative pressure in the suction chamber 125 disappears, and the normal tissue is separated from the suction hole 123. Repeat the above steps to find other suitable positions for positioning until the tumor tissue is completely removed. It should be noted that the number of times of positioning and removing the tumor tissue at the same position by the breast tumor surgical instrument 100 of the present application can be flexibly adjusted according to the size and shape of the tumor, so as to avoid mis-cutting or residual due to the change of the boundary between the tumor tissue and the normal tissue after part of the tumor tissue is removed. In other words, through multiple accurate positioning and removal, the tumor tissue can be completely removed while the surrounding normal tissue is maximally protected, and the overall success rate of the surgery is improved.

[0053] Please refer to Figure 6The rotary cutter 130 comprises a driving rod 131 and a cutter body 132, wherein one end of the driving rod 131 is connected with the cutter body 132, and the other end is connected with the driving assembly in the handle 110. The cutter body 132 is provided with a cutting edge 133 located on the side away from the piston body 141 (in this embodiment, the orientation of the cutting edge 133 is opposite to the related art), which is used to cut the tumor tissue sucked into the lumen 122 from the rotary cutting hole 124. Specifically, the driving rod 131 can drive the cutter body 132 to move along the axis direction of the catheter 120 under the driving of the driving assembly. During the movement of the cutter body 132 from the side close to the spike part 121 to the side away from the spike part 121 (in this embodiment, the movement direction of the cutter body 132 is opposite to the related art), the cutting edge 133 gradually cuts the tumor tissue. Thus, during the cutting of the tumor tissue, since the normal tissue around the tumor tissue is adsorbed by the adsorption hole 123, and the cutter body 132 moves away from the adsorption hole 123 and cuts the tumor tissue, the tumor tissue is subjected to a pulling force away from the adsorption hole 123, which further ensures the separation of the tumor tissue and the normal tissue and reduces the possibility of mistaken cutting. Moreover, since the normal tissue at the adsorption hole 123 is adsorbed and fixed, the normal tissue at the edge of the tumor tissue at the rotary cutting hole 124 (the normal tissue located on the side of the rotary cutting hole 124 away from the adsorption hole 123) is subjected to a pressing force away from the spike part 121 and moves away from the rotary cutting hole 124, effectively preventing these normal tissues from entering the rotary cutting hole 124, thereby further avoiding the mistaken cutting of the normal tissue. It should be particularly noted that, in the early stage of the design of this scheme, the applicant provided one adsorption hole 123 on each side of the rotary cutting hole 124 of the catheter 120, so that the two adsorption holes 123 can adsorb the normal tissue on both sides of the rotary cutting hole 124, thereby further improving the accuracy of the removal of the breast tumor and preventing the mistaken removal of the normal tissue. However, in the above structure, the air at the position of the adsorption hole 123 needs to be separated from the air at the position of the rotary cutting hole 124, so that the air pressure changes at the two types of holes are not affected, which increases the difficulty of the structural design of the catheter, and the pipeline structure at the position of the adsorption hole 123 away from the spike part 121 and the driving structure of the rotary cutter 130 are prone to positional interference, which affects the driving of the rotary cutter 130 on the one hand, and affects the discharge of the removed tumor on the other hand. In this scheme, by reversing the setting position of the cutting edge 133 in the related art (i.e., changing the cutting edge 133 from the side close to the spike part 121 to the side away from the spike part 121), and reversing the cutting direction of the cutter body 132 (i.e., changing the cutting direction of the cutter body 132 from gradually approaching the spike part 121 to gradually moving away from the spike part 121), only one adsorption hole 123 can be provided, and the effect of two adsorption holes 123 can also be achieved.Specifically, in this scheme, the rotating cutter 130 cuts the tumor and generates a pulling force on the tumor in a direction away from the spike part 121, which can cause the normal tissue on the side of the tumor away from the spike part 121 to be squeezed away from the rotating hole 124, so that the normal tissue on the side of the tumor close to the spike part 121 is positioned by the suction hole 123 and will not be mistakenly cut off, and the normal tissue on the side of the tumor away from the spike part 121 is squeezed away from the rotating hole 124 under the action of the pulling force exerted on the tumor by the rotating cutter 130, so it will not be mistakenly cut off. That is, in this scheme, the cutting edge 133 of the rotating cutter 130 and the cutting direction are designed in reverse, so that one suction hole 123 achieves the function of two suction holes 123, and the difficulty of structural design and processing is also reduced. At the same time, in this scheme, the cutting edge 133 of the rotating cutter 130 is directed away from the piston body 141, so that it is also more convenient for the rotating cutter 130 to push the piston body 141 to move, avoiding the cutting edge 133 abutting the piston body 141 when the rotating cutter 130 pushes the piston body 141 to move, thereby deforming the cutting edge and affecting the cutting effect.

[0054] Therefore, based on the cutting direction of the cutter body 132 on the tumor tissue, only one suction hole 123 needs to be provided on one side of the rotating hole 124 on the catheter 120, which can effectively separate the tumor tissue from the normal tissue, simplify the structure of the instrument, and improve the operation convenience. After the tumor tissue is cut off by the instrument of the present application, the cutter body 132 can move to push the cut tumor tissue out of the lumen 122. In the related art, a hollow tubular cutter is used to cut off the tumor tissue, and the cut tumor tissue is discharged through the inside of the hollow tubular cutter, but this method is prone to cause the internal negative pressure of the outer tube sleeved outside the cutter to be difficult to maintain, resulting in the inability to effectively adsorb the tumor tissue, which seriously affects the cutting effect of the tumor tissue. In the present application, after the cutter body 132 moves in the direction away from the spike part 121 to cut off the tumor tissue, it can continue to move in the direction away from the spike part 121 to push the cut tumor tissue to the outlet of the lumen 122, ensuring that the tumor tissue is smoothly discharged. This can effectively ensure the implementability of the negative pressure environment in the lumen 122, while avoiding the cut tumor tissue from blocking the lumen 122, improving the cleanliness and reliability of the surgical instrument, and reducing the risk of surgery.

[0055] In some embodiments, the cutting edge 133 of the cutter body 132 can be designed to be replaceable to adapt to the cutting needs of tumor tissues of different sizes and hardness. In addition, the cutter body 132 can also be integrated with a lighting device, such as an LED lamp, to provide a local high-intensity light source, which improves the surgical field of view, especially when operating on deep tissues. At the same time, considering that the debris generated during the operation may affect the line of sight, a cleaning nozzle can be provided on the cutter body 132 to maintain a clear and visible surgical area by injecting physiological saline or other cleaning liquid.

[0056] In some embodiments, the cutting edge 133 can also be provided on the side of the cutter body 132 facing the piston body 141, and the cutting direction of the cutter body 132 is along the axial direction of the catheter 120 and away from the spike 121. In order to avoid the cutter body 132 and / or the piston body 141 being damaged during the movement of the rotary cutter 130 pushing the piston body 141 towards the spike 121, a protruding structure is provided at the center of the side of the piston body 141 facing the cutter body 132. When the rotary cutter 130 moves towards the spike 121 and pushes the piston body 141, the protruding structure can abut the non-cutting edge 133 of the rotary cutter 130, so that the cutter body 132 is spaced apart from the piston body 141 while facilitating the transmission of the pushing force of the rotary cutter 130 to the piston body 141. It can be understood that, in some embodiments, the non-cutting edge 133 of the side of the rotary cutter 130 facing the piston body 141 can also be provided with an abutting portion, which can contact the piston body 141 during the movement of the rotary cutter 130 pushing the piston body 141, so that the piston body 141 is spaced apart from the cutter body 132 while transmitting the pushing force of the rotary cutter 130 to the piston body 141. In other embodiments, the center of the side of the piston body 141 facing the rotary cutter 130 is provided with a protruding structure, and the non-cutting edge 133 of the side of the rotary cutter 130 facing the piston body 141 is provided with an abutting portion, which can detachably contact the protruding structure, so that when the rotary cutter 130 pushes the piston body 141 to move towards the spike 121, the two can make the cutter body 132 be spaced apart from the piston body 141 while transmitting the pushing force of the rotary cutter 130 to the piston body 141.

[0057] Please refer to Figure 6 The side of the cutter body 132 away from the piston body 141 is provided with a cavity 134, which not only serves to accommodate one end of the driving rod 131 (the end close to the piston body 141), but also serves as a temporary storage area for the tumor tissue after being cut. Specifically, one end of the driving rod 131 is deeply inserted into the cavity 134 at the center position and is firmly connected with the cutter body 132, so as to ensure that the driving rod 131 can effectively transmit the driving instruction of the driving assembly during the rotary cutting operation, so that the cutter body 132 stably moves (moves and rotates) in the lumen 122 under the driving instruction. The design of the cavity 134 allows the cut tumor tissue to be temporarily stored therein, avoiding the possibility of tissue fragments blocking the catheter 120 or affecting the subsequent cutting process. This design improves the efficiency of the operation and reduces the interruption of the operation due to cleaning of tissue fragments.

[0058] Please refer to Figures 3 to 6In order to further optimize the processing flow of the tumor tissue, the cutter body 132 is provided with through holes 135. The number of the through holes 135 can be one or more, and the through holes 135 are arranged along the axis direction of the catheter 120 and are in communication with the concave cavity 134. When the morcellating cutter 130 cuts the tumor tissue and the side of the morcellating cutter 130 facing the piston moves to the side of the morcellating hole 124 away from the piston body 141, the through holes 135 can be in communication with the outside through the morcellating hole 124. Thus, the negative pressure assembly generates negative pressure on the side of the morcellating cutter 130 away from the piston body 141, and the side of the through holes 135 facing the piston body 141 is atmospheric pressure, and the atmospheric pressure can enter the concave cavity 134 through the through holes 135. The tumor tissue in the concave cavity 134 has a pressure on the side close to the piston body 141 greater than the pressure on the side close to the handle 110, so that the tumor tissue can be discharged from the lumen 122 under the pressure difference. This design not only simplifies the collection step of the tissue sample after the operation, but also effectively prevents the problem of tissue residue or blockage of the catheter 120 due to the action of negative pressure, ensuring the smooth progress of the operation process.

[0059] In some embodiments, the cutter body 132 can be composed of a ring-shaped cutter body connected head to tail, and the cutting edge 133 is located on the side away from the piston body 141. In other embodiments, the cutter body 132 can include a plurality of cutting edges, and each cutting edge is uniformly distributed on the side of the axis of the driving rod 131, and each cutting edge has a cutting edge 133 on the end away from the piston body 141. In some embodiments, the cutting edge 133 can also be provided on the end of the cutting edge away from the piston body 141 and on the side of the cutting edge close to another cutting edge.

[0060] Please refer to Figure 3The sharp portion 121 is designed to have an inclined surface 126, which not only helps to penetrate the tissue more easily, but also provides a better operating angle. The suction hole 123 is arranged through the inclined surface 126, ensuring that when the piston body 141 moves away from the sharp portion 121, the suction hole 123 can normally open to ensure that it can effectively suck normal tissue during the operation. The arrangement of the inclined surface 126 makes the intersection between the suction hole 123 and the resection hole 124 form a barrier, which can reduce the risk of tumor tissue being accidentally sucked in. The piston body 141 is provided with a blocking protrusion, which can move between a first position and a second position: in the first position, the blocking protrusion tightly fits the suction hole 123, preventing air or liquid from passing through, while avoiding the edge of the suction hole 123 scratching tissue cells during the extension of the sharp portion 121 into the subcutaneous tissue; in the second position, the blocking protrusion is separated from the suction hole 123, allowing normal tissue to be sucked by the suction hole 123. Specifically, when the resection knife 130 is driven by the drive assembly to push the piston body 141 towards the sharp portion 121 to the final position, the blocking protrusion can block the suction hole 123, and the side of the blocking protrusion away from the piston body 141 is flush with the inclined surface 126.

[0061] Please refer to Figure 3 The inside of the catheter 120 is provided with a stepped portion 127, which includes an annular stepped surface facing the piston body 141. When the drive spring 142 pushes the piston body 141 to move away from the sharp portion 121, the piston body 141 will eventually abut against this annular stepped surface. This design not only ensures the stability of the movement of the piston body 141, but also provides a fixed end position, preventing the piston body 141 from moving excessively and causing equipment failure or operation failure. In other words, the drive spring 142 is configured to drive the piston body 141 to abut against the annular stepped surface, avoiding excessive movement of the piston body 141 away from the sharp portion 121, which can cause excessive negative pressure in the suction chamber 125 and damage normal tissue, while preventing the piston body 141 from entering the lumen 122 and affecting the resection operation of the resection knife 130 on the tumor tissue. The arrangement of the stepped portion 127 also helps to improve the control accuracy of the negative pressure in the suction chamber 125, reducing the requirements for the use of the drive spring 142. The end position of each movement of the piston body 141 is defined by the annular stepped surface, ensuring the stability of the negative pressure value in the suction chamber 125, thereby effectively avoiding tissue damage caused by negative pressure fluctuations and improving the safety and efficiency of the operation.

[0062] In some embodiments, the driving force for the piston body 141 to move away from the spike 121 can be achieved by other structures other than the driving spring 142. The following is an example of driving the piston body 141 to move by magnetic components. The inside of the catheter 120 is provided with a stepped portion 127, which includes an annular stepped surface facing the piston body 141. A first magnetic component is arranged on the annular stepped surface, and a second magnetic component is arranged on the piston body 141. The rotary cutter 130 is provided with a third magnetic component. When the rotary cutter 130 moves towards the spike 121, the third magnetic component and the second magnetic component are attracted to each other, and the piston body 141 moves towards the spike 121 along with the movement of the rotary cutter 130. The first magnetic component and the second magnetic component are separated from each other. When the rotary cutter 130 moves away from the spike 121, the third magnetic component is first attracted to the second magnetic component, and the piston body 141 moves away from the spike 121 along with the movement of the rotary cutter 130 under the action of the attraction force. Until the second magnetic component is attracted to the first magnetic component, the third magnetic component is separated from the second magnetic component, and the piston body 141 finally abuts against the annular stepped surface.

[0063] It can be understood that the first magnetic component can be made of structures including but not limited to magnets and magnetic conductive materials, and the second magnetic component can be made of structures including but not limited to magnets and magnetic conductive materials. It should be noted that at least one of the first magnetic component and the second magnetic component is a magnet to ensure the reliability and stability of magnetic attraction. The third magnetic component can be made of structures including but not limited to magnets, electromagnets and magnetic conductive materials. When the second magnetic component is a magnetic conductive material, the third magnetic component needs to be a magnet or an electromagnet to achieve effective attraction. It should be noted that when the third magnetic component is an electromagnet, the size of the magnetism and the presence or absence of the magnetism can be controlled by adjusting the current, thereby achieving precise control of the connection or separation of the rotary cutter 130 and the piston body 141. It should be noted that the arrangement of the second magnetic component and the first magnetic component is beneficial to ensure that when the rotary cutter 130 and the piston body 141 are separated, the piston body 141 can maintain the state of contacting the annular stepped surface, avoiding the movement of the piston body 141 towards the spike 121 due to the negative pressure in the suction chamber 125, resulting in the failure of the suction hole 123 to suck normal tissue.

[0064] Since the piston body 141 is close to the annular step surface, the piston body 141 is always within the magnetic adsorption range in the entire active stroke. In some embodiments, a first magnetic member can be arranged on the annular step surface, and a second magnetic member can be arranged on the piston body 141 (without arranging a third magnetic member on the rotary cutter 130), and the first magnetic member and the second magnetic member attract each other. In the working process, the rotary cutter 130 is used to push the piston body 141 away from the annular step surface, and after the adsorption hole is in the appropriate position, the rotary cutter 130 is moved away from the sharp portion 121, and the adsorption force of the first magnetic member and the second magnetic member can drive the piston body 141 to abut against the annular step surface, so that the normal tissue is sucked into the adsorption hole 123.

[0065] In some embodiments, the adsorption hole 123 can be designed in the form of a plurality of micropores, which are uniformly distributed on the outer peripheral wall of the catheter 120 and distributed circumferentially around the axis of the catheter 120. Each micropore directly communicates with the inside of the lumen 122, which can increase the adsorption area and improve the adsorption effect on the normal tissue. At the same time, due to the existence of the micropores, the adsorption process is more gentle and uniform, and the risk of damage to the surrounding normal tissue is reduced. In this way, not only can the normal tissue around the surgical area be more effectively fixed, but also the tumor tissue can be prevented from being mistakenly sucked into the adsorption chamber 125 to affect the resection effect.

[0066] It should be noted that if the present application involves directional indications (such as up, down, left, right, front, back, etc.) in the embodiments, the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly. When the direction reference is introduced in the specific embodiments, if there is no special limitation that the direction is unidirectional, the direction can be unidirectional or bidirectional (two parallel and opposite directions), and whether it is unidirectional or bidirectional is based on the realization of the ordinary skill in the art. When the direction reference is bidirectional, it is considered that two different embodiments are introduced at the same time.

[0067] In addition, if the description of the present application involves "first", "second", etc., the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0068] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A breast tumor surgical instrument, characterized in that: include: The handle comprises a housing and a drive assembly and a negative pressure assembly disposed in the housing; A catheter having a spike portion at one end and an opposite end connected to the handle, wherein a lumen is defined within the catheter, and an outer wall of the catheter is provided with a rotary cut hole and an adsorption hole communicating with the lumen, wherein the adsorption hole is located between the rotary cut hole and the spike portion, and the negative pressure assembly is used to generate negative pressure within the lumen; a rotary cutter, at least partially located in the lumen, connected to the drive assembly and driven by the drive assembly to remove tumor tissue drawn into the lumen through the rotary cut hole; an adsorption assembly disposed in the lumen and located on a side of the rotary cutter close to the spike portion, the adsorption assembly being configured to generate negative pressure at the adsorption hole; the adsorption assembly comprising a piston body, the piston body separating an adsorption chamber in the lumen that is in communication with the adsorption hole, the rotary cut hole being isolated from the adsorption chamber, the piston body being configured to move in the lumen along the axial direction of the catheter to change the air pressure in the adsorption chamber; Wherein, the adsorption assembly further includes a driving spring, which is located in the adsorption chamber and is respectively connected to the conduit and the piston body; When the rotary cutter moves toward the direction approaching the spike portion, it can push the piston body to move toward the direction approaching the spike portion, so as to compress the drive spring and allow the air in the adsorption chamber to be discharged from the adsorption hole; when the drive spring is compressed and the rotary cutter moves toward the direction away from the spike portion, the drive spring pushes the piston body to move away from the spike portion, so that external air is guided from the adsorption hole to the adsorption chamber.

2. The breast tumor surgical instrument according to claim 1, characterized in that: The rotary cutter includes a drive rod and a tool body, one end of the drive rod is connected to the tool body, and the other end opposite to the drive assembly. The tool body is provided with a cutting edge on the side away from the piston body. Along the axial direction of the catheter, the tool body moves from the side of the rotary cutting hole close to the spike portion to the side away from the spike portion and removes the tumor tissue.

3. The breast tumor surgical instrument according to claim 2, characterized in that: A concave cavity is provided on the side of the tool body facing away from the piston body. The end of the driving rod close to the piston body extends into the center position of the concave cavity and is connected to the tool body. The concave cavity located on the periphery of the driving rod is used to store the removed tumor tissue.

4. The breast tumor surgical instrument according to claim 3, characterized in that: The tool body is provided with a through hole penetrating along the axial direction of the catheter, the through hole is connected to the concave cavity, and the negative pressure component sucks out the tumor tissue stored in the concave cavity through the through hole.

5. The breast tumor surgical instrument according to claim 1, characterized in that: The spike portion includes an inclined surface, and the adsorption hole passes through the inclined surface; The piston body is provided with a blocking protrusion, and the piston body can move to a first position where the blocking protrusion blocks the adsorption hole, and a second position where the blocking protrusion is separated from the adsorption hole.

6. The breast tumor surgical instrument according to claim 5, characterized in that: A step portion is provided on the inner side of the conduit, and the step portion includes an annular step surface facing the piston body. The drive spring is configured to drive the piston body to move to abut against the annular step surface.

7. The breast tumor surgical instrument according to claim 1, characterized in that: The adsorption holes include a plurality of micropores distributed circumferentially around the axis of the catheter, and each of the micropores is connected to the lumen.

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