Tumor minimally invasive biopsy sampler capable of adjusting puncture depth

Abstract

The invention relates to the technical field of medical instruments, and discloses a puncture depth-adjustable tumor minimally invasive biopsy sampler which comprises a shell, a piston rod movably penetrates through the upper portion of the shell, a round rod movably penetrates through the bottom of the shell, a force storage assembly is arranged on the upper portion of the inner wall of the shell, and a release assembly is arranged in the middle of the inner wall of the shell. A rotating assembly is arranged on the lower portion of the shell, an adjusting assembly is arranged at the bottom of the shell, the force storage assembly comprises a center rod rotationally connected to the inner wall of the shell, the outer surface of the center rod is sleeved with a clockwork spring, a gear is fixedly connected to the middle of the outer surface of the center rod, and a rack is embedded in the outer surface of the piston rod. Force storage is achieved by pulling the piston rod to be matched with gear and rack transmission, the wedge block is used for blocking, then the push rod is pressed to drive the swing rod to rotate to achieve movement of the wedge block, stored force is released, the sampling needle is pushed to move to achieve sampling, it is guaranteed that puncture power is stable and controllable, and in addition, the puncture depth can be adjusted through the adjusting assembly.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a minimally invasive tumor biopsy sampler with adjustable puncture depth. Background Technology

[0002] With the development of personalized medicine and minimally invasive technology, there is an urgent need for diagnostic and treatment tools that are minimally invasive, accurate in sampling, and convenient in operation. Minimally invasive tumor surgery, based on the concept of minimally invasive surgery, combined with image guidance and precision instrument design, can achieve precise lesion localization and minimally invasive operation. Minimally invasive biopsy samplers are key minimally invasive medical devices for tumor pathological diagnosis. They can accurately puncture the tumor lesion and complete tissue incision and retrieval in one go with the help of a cutting blade. The samples are complete, easy to disinfect, and can be used once, which can reduce cross-contamination.

[0003] In the prior art, Chinese patent document CN215739135U discloses a minimally invasive tumor biopsy sampler, including a sheath rod, a shearing part, an elastic part, a shearing blade, a limiting groove, a rotating sleeve, a thin screw, and a perforation. The rotating sleeve is threaded onto the thin screw, and when it rotates on the sheath rod, it drives the thin screw to move axially along the sheath rod, pulling the two elastic parts to slide within the limiting groove, thereby bringing the two shearing blades closer together to complete the shearing action. Through the rotation of the rotating sleeve, the thin screw pulls the elastic parts to slide within the limiting groove, thereby bringing the shearing blades on the two elastic parts closer together to shear the tumor tissue. The operation is convenient, and the elastic parts will not move on their own, thus not affecting the biopsy sampling operation. By setting a rubber plate, the puncture depth of the sheath rod can be adjusted to avoid excessive puncture depth causing damage to the tumor tissue.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: Existing samplers use an elastic release method for sampling, but the puncture depth for each stretch release is fixed, which is not convenient to adjust the puncture depth according to specific needs. At the same time, elastic release puncture mainly relies on the stretching length of the spring. When stretching the piston rod during puncture, the unavoidable force can easily cause hand tremors, and it is necessary to control the piston rod to be in the stretched state, which is inconvenient to operate. In addition, the single elastic release sampling and cutting is not crisp enough. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing sampler has the disadvantage that the elastic puncture depth is not easy to adjust and the operation of the stretching piston rod is inconvenient. To this end, we propose a tumor minimally invasive biopsy sampler with adjustable puncture depth.

[0006] To achieve the above objectives, this application adopts the following technical solution: a tumor minimally invasive biopsy sampler with adjustable puncture depth, comprising a housing, a piston rod movably inserted in the upper part of the housing, a round rod movably inserted in the bottom of the housing, a power storage component provided in the upper part of the inner wall of the housing, a release component provided in the middle part of the inner wall of the housing, a rotation component provided in the lower part of the housing, and an adjustment component provided in the bottom of the housing; The power storage component includes a central rod rotatably connected to the inner wall of the housing, a spring-loaded spring sleeved on the outer surface of the central rod, a gear fixedly connected to the middle of the outer surface of the central rod, and a rack embedded in the outer surface of the piston rod. The rotating assembly includes a base disposed on the inner wall of the bottom of the housing, a vertical plate fixedly connected to the upper surface of the base, a guide rod inserted through the middle of the vertical plate, and a double-track guide groove formed on the outer surface of the round rod.

[0007] Preferably, hollow cylinders are fixedly connected to both sides of the inner wall of the shell, and an inner rod is movably inserted into the end of the hollow cylinder away from the inner wall of the shell. A wedge block is fixedly connected to the end of the inner rod away from the hollow cylinder, and a first spring is provided inside the hollow cylinder. The end of the first spring away from the hollow inner wall is fixedly connected to the end of the inner rod.

[0008] Preferably, the release assembly includes a push rod that moves through the outer surface of the housing, one end of the push rod extending into the housing is fixedly connected to a retainer, and a slide rod is fixedly connected to the outer surface of the inner rod.

[0009] Preferably, a shaft is fixedly connected to the inner wall of the housing, a rocker arm is movably sleeved on the outer surface of the shaft, a strip groove is opened through the outer surface of the rocker arm, and both ends of the card seat and the slide rod are slidably engaged with the inner wall of the strip groove.

[0010] Preferably, a friction rod is fixedly connected to the upper surface of the base, and an arc-shaped cover is movably fitted onto the outer surface of the friction rod, with the arc-shaped cover located directly above the vertical plate.

[0011] Preferably, a friction ring is slidably connected to the outer surface of the guide rod, the top end of the friction ring is fixedly connected to the lower surface of the arc-shaped cover, a second spring is provided on the lower surface of the friction ring, and the bottom end of the second spring is fixedly connected to the upper surface of the base.

[0012] Preferably, the vertical plate and guide rod are provided in two sets and symmetrically arranged on both sides of the round rod, the double-track guide groove is set in the same direction of rotation, and the guide rod is slidably engaged in the double-track guide groove.

[0013] Preferably, the adjusting component includes a threaded ring fixedly connected to the bottom of the housing, and the threaded ring has a hollow threaded tube internally threaded.

[0014] Preferably, the top end of the hollow threaded tube is fixedly connected to the lower surface of the base.

[0015] Preferably, a plate is fixedly connected to the bottom end of the piston rod, the top end of the round rod is fixedly connected to the lower surface of the plate, a sampling needle is fixedly connected to the bottom end of the round rod, and a handle is provided on the outer surface of the housing.

[0016] The technical effects and advantages of this invention are as follows: In this invention, the power is stored by pulling the piston rod in conjunction with the gear and rack transmission, and the wedge is used for blocking. Then, the wedge is moved by pressing the push rod to drive the swing arm to rotate. The stored power is released and pushes the sampling needle to move to achieve sampling, ensuring that the puncture power is stable and controllable. In addition, the puncture depth can be adjusted by adjusting the component. In this invention, the sliding engagement structure of the biaxial guide groove on the outer surface of the round rod and the guide rod is used to drive the round rod to rotate synchronously through the guiding and limiting effect, thereby driving the sampling needle to rotate during puncture, which improves the cutting power of tumor tissue and improves the overall sampling efficiency. In this invention, the contact between the plate and the arc-shaped cover pushes the friction ring to slide along the friction rod. The relative sliding friction between the friction ring and the friction rod counteracts the falling impact force. Combined with the elastic buffering and reset function of the second spring, a double buffering and force-relieving effect is achieved, effectively reducing the vibration amplitude of the device and ensuring the stability of the puncture process. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the energy storage component structure of the present invention; Figure 4 This is a schematic diagram of the cooperation structure between the power storage component and the limiting component of the present invention; Figure 5 This is a schematic diagram of the limiting component structure of the present invention; Figure 6 This is a schematic diagram of the mating structure of the rotating component and the adjusting component of the present invention; Figure 7 This is a schematic diagram of the rotating component structure of the present invention.

[0018] Legend: 1. Housing; 2. Piston rod; 3. Plate; 4. Round rod; 5. Sampling needle; 6. Power storage assembly; 61. Rack; 62. Center rod; 63. Gear; 64. Spring; 65. Hollow cylinder; 66. Inner rod; 67. Wedge; 68. First spring; 7. Release assembly; 71. Push rod; 72. Card seat; 73. Shaft; 74. Swing rod; 75. Slide rod; 76. Strip groove; 8. Rotating assembly; 81. Base; 82. Vertical plate; 83. Guide rod; 84. Double-rail guide groove; 85. Friction rod; 86. Arc-shaped cover; 87. Friction ring; 88. Second spring; 9. Adjusting assembly; 91. Threaded ring; 92. Hollow threaded tube; 10. Handle. Detailed Implementation

[0019] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0020] Reference Figures 1 to 7 As shown, the present invention provides a technical solution: a tumor minimally invasive biopsy sampler with adjustable puncture depth, including a housing 1, a piston rod 2 movably inserted in the upper part of the housing 1, a round rod 4 movably inserted in the bottom of the housing 1, a power storage component 6 provided in the upper part of the inner wall of the housing 1, a release component 7 provided in the middle part of the inner wall of the housing 1, a rotation component 8 provided in the lower part of the housing 1, and an adjustment component 9 provided in the bottom of the housing 1; The bottom end of the piston rod 2 is fixedly connected to a plate 3, the top end of the round rod 4 is fixedly connected to the lower surface of the plate 3, the bottom end of the round rod 4 is fixedly connected to a sampling needle 5, and a handle 10 is provided on the outer surface of the housing 1.

[0021] When performing minimally invasive tumor biopsy sampling, medical staff hold the guide tube and slowly insert the needle along the marked path. With the help of image guidance, they confirm that the needle tip is close to the edge of the tumor. Then, they withdraw the inner needle, pick up the pre-prepared sampler, hold the handle 10 with one hand and pull the piston rod 2 upward with the other hand. The piston rod 2 moves upward, causing the plate 3, the round rod 4, and the sampling needle 5 to move upward simultaneously. The force storage component 6 completes the limiting and force storage of the piston rod 2. Pressing the release component 7 can release the piston rod 2 downward. The puncture is completed by the elastic release force. During the downward puncture, the rotation component 8 can increase the rotation of the puncture needle, improve the cutting power of the tumor tissue, improve the overall sampling efficiency, and buffer and offset the impact force of the piston rod 2 falling, effectively reducing the vibration amplitude of the device and ensuring the stability of the puncture process. In addition, the depth of puncture can be controlled by the adjustment component 9.

[0022] Reference Figures 2 to 6 As shown, the power storage assembly 6 includes a central rod 62 rotatably connected to the inner wall of the housing 1, a spring-loaded spring 64 sleeved on the outer surface of the central rod 62, a gear 63 fixedly connected to the middle of the outer surface of the central rod 62, a rack 61 embedded in the outer surface of the piston rod 2, hollow cylinders 65 fixedly connected to both sides of the inner wall of the housing 1, an inner rod 66 movably inserted at the end of the hollow cylinder 65 away from the inner wall of the housing 1, a wedge block 67 fixedly connected to the end of the inner rod 66 away from the hollow cylinder 65, a first spring 68 disposed inside the hollow cylinder 65, and the end of the first spring 68 away from the hollow inner wall fixedly connected to the end of the inner rod 66; The adjusting component 9 includes a threaded ring 91 fixedly connected to the bottom of the housing 1. The threaded ring 91 has a hollow threaded tube 92 internally connected to it, and the hollow threaded tube 92 is located at the bottom of the rotating component 8.

[0023] Pulling piston rod 2 upward causes it to move upward, simultaneously moving plate 3, round rod 4, and sampling needle 5 upward. During the upward movement of piston rod 2, the rack 61 embedded in its outer surface will drive gear 63 to rotate. The rotation of gear 63 will drive the central rod 62 to rotate and compress the spring 64. The spring 64 is compressed and accumulates elastic potential energy. After plate 3 moves upward and contacts wedge 67, it will push wedge 67. Wedge 67 will push inner rod 66 to slide into hollow cylinder 65 and compress the first spring. 68. After the plate 3 passes the wedge 67, the first spring 68 rebounds and pushes the wedge 67 to limit and engage with the lower part of the plate 3, thus blocking and limiting the plate 3. Then, pressing the release component 7 enables the piston rod 2 to fall quickly, driving the puncture needle to puncture, ensuring stable and controllable puncture power. By rotating the hollow threaded tube 92, it can slide upward along the threaded ring 91, which will push the rotating component 8 to move upward, thereby controlling the falling height of the piston rod 2 and achieving the effect of controlling the puncture depth.

[0024] Reference Figures 2 to 5 As shown, the release assembly 7 includes a push rod 71 that is movably inserted through the outer surface of the housing 1. One end of the push rod 71 that extends into the housing 1 is fixedly connected to a retainer 72. A slide rod 75 is fixedly connected to the outer surface of the inner rod 66. A shaft 73 is fixedly connected to the inner wall of the housing 1. A swing rod 74 is movably sleeved on the outer surface of the shaft 73. A strip groove 76 is opened through the outer surface of the swing rod 74. Both ends of the retainer 72 and the slide rod 75 are slidably engaged with the inner wall of the strip groove 76.

[0025] Pressing the push rod 71 pushes the card holder 72 to move into the housing 1. The card holder 72 pushes the swing rod 74 to rotate around the shaft 73. The other end of the swing rod 74 pulls the slide rod 75 to move synchronously, which in turn pushes the inner rod 66 to move into the hollow cylinder 65. After the wedge block 67 separates from the plate 3, the central rod 62 rotates rapidly under the elastic potential energy of the spring 64, which drives the gear 63 to rotate. The gear 63 drives the rack 61 to move, which in turn pushes the piston rod 2 to slide downwards rapidly, simultaneously pushing the round rod 4 and the sampling needle 5 to move and penetrate the tumor, achieving the release effect.

[0026] Reference Figure 2 , Figure 6 and Figure 7 As shown, the rotating assembly 8 includes a base 81 disposed on the inner wall of the bottom of the housing 1. A vertical plate 82 is fixedly connected to the upper surface of the base 81. A guide rod 83 is inserted through the middle of the vertical plate 82. A double-track guide groove 84 is opened on the outer surface of the round rod 4. A friction rod 85 is fixedly connected to the upper surface of the base 81. An arc-shaped cover 86 is movably fitted on the outer surface of the friction rod 85. The arc-shaped cover 86 is located directly above the vertical plate 82. A friction ring 87 is slidably connected to the outer surface of the guide rod 83. The top end of the friction ring 87 is fixedly connected to the lower surface of the arc-shaped cover 86. A second spring 88 is disposed on the lower surface of the friction ring 87. The bottom end of the second spring 88 is fixedly connected to the upper surface of the base 81. Two sets of vertical plates 82 and guide rods 83 are disposed symmetrically on both sides of the round rod 4. The double-track guide groove 84 is disposed in a unidirectional rotation manner. The guide rod 83 is slidably engaged in the double-track guide groove 84. The top end of the hollow threaded tube 92 is fixedly connected to the lower surface of the base 81.

[0027] During the downward movement of piston rod 2, guide rod 83 is slidably engaged in the double-axis guide groove on the outer surface of round rod 4. Under the guidance and limitation of guide rod 83, round rod 4 will be driven to rotate, which will in turn drive sampling needle 5 to rotate. Thus, sampling needle 5 increases the rotation action during puncture, increases the cutting power on the lesion, and improves sampling efficiency. Under the impact of falling, the plate 3 pushes the arc-shaped cover 86. The arc-shaped cover 86 moves down synchronously, which pushes the friction ring 87 to slide along the friction rod 85. The friction between the friction ring 87 and the friction rod 85 eliminates the impact of falling. At the same time, the second spring 88 provides buffering and reset, thereby reducing the impact of falling and avoiding device vibration caused by direct impact with the shell 1, thus enhancing the stability of sampling.

[0028] Working principle: When performing minimally invasive tumor biopsy sampling, medical staff hold the guide tube and slowly insert the needle along the marked path. With the help of image guidance, they confirm that the needle tip is close to the edge of the tumor. Then, they withdraw the inner needle, pick up the pre-prepared sampler, hold the handle 10 with one hand, and pull the piston rod 2 upward with the other hand. The piston rod 2 moves upward, causing the plate 3, the round rod 4, and the sampling needle 5 to move upward synchronously. During the upward movement of the piston rod 2, the rack 61 embedded on its outer surface will drive the gear 63 to rotate. The rotation of the gear 63 drives the center... The rod 62 rotates and compresses the spring 64. The spring 64 is compressed and accumulates elastic potential energy. After the plate 3 moves up and contacts the wedge 67, it will push the wedge 67. The wedge 67 pushes the inner rod 66 to slide into the hollow cylinder 65 and compress the first spring 68. After the plate 3 passes the wedge 67, the first spring 68 rebounds and pushes the wedge 67 to limit and lock it at the lower part of the plate 3, blocking and limiting the plate 3. Then, the medical staff aligns the sampling needle 5 and inserts it into the guide tube until it is close to the edge of the tumor. Next, the medical staff press the push rod 71, which pushes the card holder 72 to move into the housing 1. The card holder 72 pushes the swing rod 74 to rotate around the shaft 73. The other end of the swing rod 74 pulls the slide rod 75 to move synchronously, which in turn pushes the inner rod 66 to move into the hollow cylinder 65. After the wedge 67 separates from the plate 3, the central rod 62 rotates rapidly under the elastic potential energy of the spring 64, which drives the gear 63 to rotate. The gear 63 drives the rack 61 to move, which in turn pushes the piston rod 2 to slide down rapidly, which simultaneously pushes the round rod 4 and the sampling needle 5 to move and penetrate the tumor. During the downward movement, the guide rod 83 is slidably engaged in the double-axis guide groove on the outer surface of the round rod 4. Under the guidance and limitation of the guide rod 83, the round rod 4 will be driven to rotate, which will in turn drive the sampling needle 5 to rotate. In this way, the sampling needle 5 increases the rotation during the puncture process, increases the cutting power on the lesion, and improves the sampling efficiency. When plate 3 moves down close to the bottom of housing 1, it will contact the arc-shaped cover 86. Under the action of the falling impact, the arc-shaped cover 86 is pushed. The arc-shaped cover 86 moves down synchronously, which pushes the friction ring 87 to slide along the friction rod 85. The friction between the friction ring 87 and the friction rod 85 will eliminate the falling impact. At the same time, the second spring 88 is used for buffering and reset, which achieves the effect of reducing the falling impact and avoiding the device shaking caused by direct impact with housing 1, thus enhancing the stability of sampling. In addition, by rotating the hollow threaded tube 92, it can slide upward along the threaded ring 91, which will push the base 81 and the structure above the base 81 to move upward synchronously. Medical staff can control the falling height of piston rod 2 by adjusting the upward movement distance of hollow threaded tube 92, thereby achieving the effect of adjusting the puncture depth.

[0029] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. An adjustable-depth tumor biopsy sampler, characterized in that, include: The housing (1) has a piston rod (2) movably inserted in the upper part of the housing (1), a round rod (4) movably inserted in the bottom of the housing (1), a power storage component (6) provided in the upper part of the inner wall of the housing (1), a release component (7) provided in the middle part of the inner wall of the housing (1), a rotating component (8) provided in the lower part of the housing (1), and an adjusting component (9) provided in the bottom of the housing (1). The power storage component (6) includes a central rod (62) rotatably connected to the inner wall of the housing (1), a spring spring (64) is sleeved on the outer surface of the central rod (62), a gear (63) is fixedly connected to the middle of the outer surface of the central rod (62), and a rack (61) is embedded in the outer surface of the piston rod (2). The rotating assembly (8) includes a base (81) disposed on the inner wall of the bottom of the housing (1), a vertical plate (82) is fixedly connected to the upper surface of the base (81), a guide rod (83) is inserted through the middle of the vertical plate (82), and a double-track guide groove (84) is opened on the outer surface of the round rod (4).

2. The tumor minimally invasive biopsy sampling device with adjustable puncture depth according to claim 1, characterized in that: Hollow cylinders (65) are fixedly connected to both sides of the inner wall of the housing (1). An inner rod (66) is movably inserted at one end of the hollow cylinder (65) away from the inner wall of the housing (1). A wedge (67) is fixedly connected at one end of the inner rod (66) away from the hollow cylinder (65). A first spring (68) is provided inside the hollow cylinder (65). The end of the first spring (68) away from the hollow inner wall is fixedly connected to the end of the inner rod (66).

3. The tumor minimally invasive biopsy sampling device with adjustable puncture depth according to claim 2, characterized in that: The release assembly (7) includes a push rod (71) that is movably inserted through the outer surface of the housing (1). One end of the push rod (71) that extends into the housing (1) is fixedly connected to a retainer (72). The outer surface of the inner rod (66) is fixedly connected to a slide rod (75).

4. The tumor minimally invasive biopsy sampling device with adjustable puncture depth according to claim 3, characterized in that: The inner wall of the housing (1) is fixedly connected to a shaft (73), and a swing rod (74) is movably sleeved on the outer surface of the shaft (73). A strip groove (76) is opened through the outer surface of the swing rod (74), and both ends of the card seat (72) and the slide rod (75) are slidably engaged with the inner wall of the strip groove (76).

5. The tumor minimally invasive biopsy sampling device with adjustable puncture depth according to claim 1, characterized in that: A friction rod (85) is fixedly connected to the upper surface of the base (81), and an arc-shaped cover (86) is movably fitted on the outer surface of the friction rod (85). The arc-shaped cover (86) is located directly above the vertical plate (82).

6. The tumor minimally invasive biopsy sampling device with adjustable puncture depth according to claim 5, characterized in that: A friction ring (87) is slidably connected to the outer surface of the guide rod (83). The top end of the friction ring (87) is fixedly connected to the lower surface of the arc-shaped cover (86). A second spring (88) is provided on the lower surface of the friction ring (87). The bottom end of the second spring (88) is fixedly connected to the upper surface of the base (81).

7. The tumor minimally invasive biopsy sampling device with adjustable puncture depth according to claim 1, characterized in that: The vertical plate (82) and guide rod (83) are provided in two sets and symmetrically arranged on both sides of the round rod (4). The double-track guide groove (84) is set in the same direction of rotation. The guide rod (83) is slidably engaged in the double-track guide groove (84).

8. The tumor minimally invasive biopsy sampling device with adjustable puncture depth according to claim 1, characterized in that: The adjustment assembly (9) includes a threaded ring (91) fixedly connected to the bottom of the housing (1), and the threaded ring (91) is internally threaded with a hollow threaded tube (92).

9. The tumor minimally invasive biopsy sampling device with adjustable puncture depth according to claim 8, characterized in that: The top end of the hollow threaded tube (92) is fixedly connected to the lower surface of the base (81).

10. The tumor minimally invasive biopsy sampling device with adjustable puncture depth according to claim 1, characterized in that: The bottom end of the piston rod (2) is fixedly connected to a plate (3), the top end of the round rod (4) is fixedly connected to the lower surface of the plate (3), the bottom end of the round rod (4) is fixedly connected to a sampling needle (5), and a handle (10) is provided on the outer surface of the housing (1).

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