Negative pressure self-adjusting type electric rotary cutting biopsy needle

Abstract

The invention belongs to the technical field of biopsy needles, and particularly relates to a negative pressure self-adjusting type electric rotary cutting biopsy needle which comprises a biopsy device and a negative pressure cavity, and the biopsy device comprises a shell, an outer tube, an inner tube, a tool bit, a motor, a gear set and a biopsy drawer; the motor and the biopsy drawer are arranged in the shell, the outer tube is fixedly installed at the left end of the shell, the inner tube is arranged in the outer tube, the tool bit is fixedly connected with the inner tube, the output end of the motor is connected with the inner tube through the gear set, and the inner tube is connected with the interior of the biopsy drawer. The negative pressure cavity comprises a battery pack, a negative pressure pump, two guide pipes, an adjusting cavity, an end cover and a negative pressure pipe; according to the device, the problems that when a doctor uses a biopsy needle at present, the biopsy needle is complicated and inflexible, the intensity of negative pressure cannot be accurately controlled, and consequently the extraction force is too large or too small, and the operation safety is affected are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of biopsy needles, and in particular relates to a negative pressure self-adjusting electric rotary cutting biopsy needle. Background Art

[0002] The existing rotary biopsy needles on the market need to be used in conjunction with special equipment. The internal rotary cutter moves back and forth and needs to rely on the hospital's power supply and negative pressure system. It is complicated and inflexible for doctors to use.

[0003] This solution describes an electric biopsy needle with its own power supply and negative pressure pump. It is completely independent of the hospital's power supply and negative pressure system, easy to operate, and has the problem that the pressure of the negative pressure system on the market cannot be accurately controlled, resulting in insufficient force for extracting biopsy tissue or excessive extraction force, causing risks in the operation. Summary of the invention

[0004] The purpose of the present invention is to provide a negative pressure self-adjusting electric rotary cutting biopsy needle to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a negative pressure self-adjusting electric rotary biopsy needle, comprising a biopsy device and a negative pressure chamber, wherein the biopsy device comprises a shell, an outer tube, an inner tube, a cutter head, a motor, a gear set and a biopsy drawer; the motor and the biopsy drawer are both arranged inside the shell, the outer tube is fixedly installed at the left end of the shell, the inner tube is arranged inside the outer tube, and the cutter head is fixedly connected to the inner tube, the output end of the motor is connected to the inner tube through the gear set, the inner tube is connected to the inside of the biopsy drawer, and the negative pressure chamber comprises a battery pack, a negative pressure pump, two A catheter, an adjusting chamber, an end cover and a negative pressure tube; a hole is arranged on the top of the negative pressure chamber, and the end cover covers the hole for sealing, the two ends of the negative pressure tube are respectively connected to one of the catheters and the inside of the biopsy drawer, and are inserted into the end cover, a hose is connected between the two catheters, through holes are arranged above and below the two adjusting chambers, and the two catheters are respectively fixedly inserted into the through holes, the hose is located inside the adjusting chamber, the battery pack and the negative pressure pump are both fixedly installed on the bottom of the inner wall of the negative pressure chamber, the battery pack is respectively connected to the negative pressure pump and the motor wire, and the negative pressure pump is connected to another catheter.

[0006] The present invention further illustrates that an electric motor is fixed on the right side of the inner wall of the regulating chamber, and a gear is fixedly connected to the output end of the electric motor, a fixed plate is fixed on one side of the gear, a sliding rod is slidably connected to the middle of the fixed plate, a limiting block is fixed on the outer side of the sliding rod, a pressing spring is fixed between the limiting block and the fixed plate, an arc block is fixed on the outer end of the sliding rod, and the arc block contacts with the hose after rotation; an expansion joint is fixed on the right side of the inner wall of the regulating chamber, a top block is fixed on the left end of the expansion joint, and the left side of the top block fits with the right side of the hose.

[0007] The present invention further illustrates that a hydraulic chamber is fixed above the inner wall of the regulating chamber, a hydraulic plate is slidably connected to the inner wall of the hydraulic chamber, and top balls are fixed on both the left and right sides of the lower surface of the hydraulic plate; a sliding hole is arranged below the hydraulic chamber, and a connecting rod is slidably connected in the sliding hole, a plurality of gear rings are fixed to the outer ring of the connecting rod, and the gear rings are meshed with the gears, the top of the hydraulic chamber is connected to the pipe between the telescopic joint, and two squeezing balls are respectively fixed on the left and right sides of the upper end of the connecting rod, and the two squeezing balls are respectively in contact with the two top balls.

[0008] The present invention further describes that an elastic spring is fixed between the hydraulic plate and the upper part of the inner wall of the hydraulic chamber; a baffle is fixed on one side of the connecting rod, and the sliding rod contacts the baffle after moving.

[0009] The present invention further describes that a volute spring is connected between the upper end of the connecting rod and the bottom of the hydraulic plate.

[0010] The present invention further illustrates that a limiting block is fixed in the middle of the bottom of the hydraulic plate, and the bottom of the limiting block is fixedly connected to the upper end of the connecting rod through a volute spring.

[0011] The present invention further illustrates that the biopsy device is provided with a parameter setting module and an automatic adjustment module. The parameter setting module is used by medical personnel to set the pressure of the negative pressure pump when extracting the biopsy. The automatic adjustment module is used to automatically control the rotation angle of the electric motor according to the set negative pressure. The rotation angle of the electric motor is adjusted in the following manner: Q is the rotation angle of the electric motor, Q max is the maximum rotation angle of the electric motor, F is the negative pressure of the negative pressure pump, and F max It is the maximum negative pressure value of the negative pressure pump.

[0012] The present invention further states that when the negative pressure of the negative pressure pump reaches the maximum, Q = Q max , the slider moves and pushes the baffle; and when Q max , the slide bar does not contact the baffle.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention combines a negative pressure device with a biopsy needle, which solves the problem that the current rotary biopsy needle needs to be used together with special equipment, needs to rely on the power supply and negative pressure system of the hospital, and is complicated and inflexible for doctors to use; and when the negative pressure pump is running, the inner diameter of the hose is controlled, so that when the negative pressure is large, the inner diameter of the hose is reduced, thereby reducing the size of the airflow and controlling the negative pressure intensity, avoiding safety accidents caused by excessive extraction intensity during the operation, improving safety performance, and the intensity of the negative pressure is relatively more stable; ​

[0014] The top block and the arc block squeeze both sides of the hose synchronously, so that both sides deform synchronously. On the one hand, the inner diameter of the hose can be further controlled, thereby controlling the extraction force. On the other hand, the airflow is stabilized, and the extraction process is smoother.

[0015] By pressing the spring to deform under force, a reaction force is generated, which can ensure the squeezing strength of the arc block on the hose and control the airflow. At the same time, the sliding rod contacts the baffle, causing the telescopic joint to retract slightly, reducing the squeezing force of the top block on the hose, thereby avoiding excessive bidirectional squeezing of the hose, which would cause complete blockage of the hose and affect the extraction of biopsy tissue, and relatively avoid excessive deformation of the hose, which would affect its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a plan view of the negative pressure chamber of the present invention;

[0019] Figure 3 It is a schematic diagram of the internal structure of the regulating chamber of the present invention;

[0020] Figure 4 It is a schematic diagram of the installation position of the hose of the present invention;

[0021] Figure 5 It is a schematic diagram of all structures of the extruded hose of the present invention;

[0022] Figure 6 It is a schematic diagram of the installation position of the slide bar of the present invention;

[0023] Figure 7 It is a schematic diagram of the pipeline connection mode between the hydraulic chamber and the expansion joint of the present invention;

[0024] Figure 8 is a plan view of the regulating cavity of the present invention;

[0025] In the figure: 1. shell; 2. outer tube; 3. inner tube; 4. cutter head; 5. negative pressure chamber; 51. battery pack; 52. negative pressure pump; 53. catheter; 54. regulating chamber; 541. electric motor; 542. gear; 543. fixing plate; 544. sliding rod; 545. limiting block; 546. pressing spring; 547. arc block; 55. end cover; 56. negative pressure pipe; 57. hose; 58. telescopic joint; 581. top block; 59. hydraulic chamber; 591. hydraulic plate; 592. top ball; 593. elastic spring; 594. connecting rod; 595. gear ring; 596. baffle; 597. volute spring; 598. squeezing ball; 599. limiting block. DETAILED DESCRIPTION

[0026] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-8 The present invention provides a technical solution: a negative pressure self-adjusting electric rotary biopsy needle, comprising a biopsy device and a negative pressure chamber 5, the biopsy device comprising a housing 1, an outer tube 2, an inner tube 3, a cutter head 4, a motor, a gear set and a biopsy drawer;

[0028] The motor and the biopsy drawer are both arranged inside the housing 1, the outer tube 2 is fixedly installed at the left end of the housing 1, the inner tube 3 is arranged inside the outer tube 2, and the cutter head 4 is fixedly connected to the inner tube 3, the output end of the motor is connected to the inner tube 3 through a gear set, and the inner tube 3 is connected to the inside of the biopsy drawer, and the negative pressure chamber 5 includes a battery pack 51, a negative pressure pump 52, two catheters 53, an adjustment chamber 54, an end cover 55 and a negative pressure tube 56;

[0029] A hole is provided at the top of the negative pressure chamber 5, and the end cap 55 covers the hole for sealing. The two ends of the negative pressure tube 56 are respectively connected to one of the catheters 53 and the inside of the biopsy drawer, and are inserted into the end cap 55. A hose 57 is connected between the two catheters 53. Through holes are provided above and below the two regulating chambers 54, and the two catheters 53 are respectively fixedly inserted into the through holes. The hose 57 is located inside the regulating chamber 54. The battery pack 51 and the negative pressure pump 52 are both fixedly installed at the bottom of the inner wall of the negative pressure chamber 5. The battery pack 51 is respectively connected to the negative pressure pump 52 and the motor wire, and the negative pressure pump 52 is connected to another catheter 53;

[0030] During biopsy, the medical staff holds the biopsy device and starts the biopsy device. The negative pressure pump 52 and the motor run synchronously. The motor drives the inner tube 3 to rotate through the gear set, and the inner tube 3 drives the blade 4 to rotate to cut the biopsy tissue. Then the negative pressure pump 52 generates negative pressure, and evacuates the inside of the biopsy drawer through the catheter 53, the hose 57 and the negative pressure tube 56. The negative pressure generated inside the biopsy drawer is used to absorb the cut tissue through the inner tube 3, and the tissue enters the biopsy drawer through the inner tube 3 to be used for biopsy. The operation is convenient and efficient, and solves the problem that the current rotary biopsy needle needs to be matched with special equipment for use, needs to rely on the hospital's power supply and negative pressure system, and is complicated and inflexible for doctors to use.

[0031] An electric motor 541 is fixed to the right side of the inner wall of the regulating chamber 54, a gear 542 is fixedly connected to the output end of the electric motor 541, a fixing plate 543 is fixed to one side of the gear 542, a sliding rod 544 is slidably connected to the middle of the fixing plate 543, a limiting block 545 is fixed to the outer side of the sliding rod 544, a pressing spring 546 is fixed between the limiting block 545 and the fixing plate 543, an arc block 547 is fixed to the outer end of the sliding rod 544, and the arc block 547 contacts the hose 57 after rotation;

[0032] A telescopic joint 58 is fixed to the right side of the inner wall of the regulating chamber 54, a top block 581 is fixed to the left end of the telescopic joint 58, and the left side of the top block 581 is in contact with the right side of the hose 57;

[0033] When the negative pressure pump 52 is running, its negative pressure intensity is adjustable. When adjusting the negative pressure, the electric motor 541 rotates to drive the gear 542 to rotate. The gear 542 drives the slide bar 544 to rotate around the center through the fixed plate 543, thereby driving the arc block 547 to rotate around the center of the gear 542 until the arc block 547 contacts the hose 57 and squeezes each other to deform the hose 57, thereby reducing the inner diameter of the hose 57. When the negative pressure is large, the airflow size is reduced by reducing the inner diameter of the hose 57, thereby controlling the negative pressure intensity, avoiding safety accidents caused by excessive extraction intensity during the operation, improving safety performance, and making the negative pressure intensity relatively more stable.

[0034] A hydraulic chamber 59 is fixed above the inner wall of the regulating chamber 54, a hydraulic plate 591 is slidably connected to the inner wall of the hydraulic chamber 59, and top balls 592 are fixed on both left and right sides of the lower surface of the hydraulic plate 591;

[0035] A sliding hole is provided below the hydraulic chamber 59, and a connecting rod 594 is slidably connected in the sliding hole. A plurality of tooth rings 595 are fixed to the outer ring of the connecting rod 594, and the tooth rings 595 mesh with the gear 542. The upper part of the hydraulic chamber 59 is connected to the pipe between the telescopic joint 58. Two squeezing balls 598 are fixed to the left and right sides of the upper end of the connecting rod 594, and the two squeezing balls 598 are in contact with the two top balls 592 respectively.

[0036] When the gear 542 rotates, it rotates clockwise, thereby driving the connecting rod 594 to move upward through the meshing of the gear ring 595. The connecting rod 594 moves upward by pressing the top ball 592 through the squeezing ball 598. The top ball 592 drives the hydraulic plate 591 to slide upward along the inner wall of the hydraulic chamber 59. The liquid above the hydraulic plate 591 is squeezed and enters the expansion joint 58 through the pipeline, so that the expansion joint 58 is extended, thereby driving the top block 581 to move to the left, so that the top block 581 and the arc block 547 squeeze the two sides of the hose 57 synchronously, so that the two sides are deformed synchronously. On the one hand, it can further control the inner diameter of the hose 57, thereby controlling the extraction force. On the other hand, it makes the airflow flow stable and the extraction process smoother.

[0037] An elastic spring 593 is fixed between the hydraulic plate 591 and the upper inner wall of the hydraulic chamber 59;

[0038] A baffle 596 is fixed to one side of the connecting rod 594 , and the sliding rod 544 contacts the baffle 596 after moving.

[0039] A volute spring 597 is connected between the upper end of the connecting rod 594 and the bottom of the hydraulic plate 591;

[0040] When the hydraulic plate 591 slides upward along the inner wall of the hydraulic chamber 59, the elastic spring 593 is deformed by force, and when the squeezing strength of the arc block 547 on the hose 57 reaches the maximum, the top block 581 also moves to the left and squeezes the arc block 547, pushing the arc block 547 to be forced to the left, and the arc block 547 drives the slide bar 544 to slide to the left along the inside of the fixed plate 543, and through the limit block 545, the pressing spring 546 is deformed by force, thereby generating a reaction force, which can ensure the squeezing strength of the arc block 547 on the hose 57 and control the size of the airflow. At the same time, the slide bar 544 contacts the baffle 596 and pushes The baffle 596 rotates, and the baffle 596 drives the connecting rod 594 to rotate. The connecting rod 594 drives the squeezing ball 598 to rotate and disengage from the top ball 592. At this time, the volute spring 597 is deformed by force. At the same time, since the squeezing ball 598 is offset from the top ball 592, the elastic spring 593 generates a reaction force, causing the hydraulic plate 591 to move slightly in the opposite direction, thereby causing the telescopic joint 58 to retract slightly, reducing the squeezing pressure of the top block 581 on the hose 57, thereby avoiding the excessive strength of the bidirectional squeezing hose 57, which causes the hose 57 to be completely blocked and affects the extraction of biopsy tissue, and relatively avoids excessive deformation of the hose 57 and affects its service life.

[0041] A limiting block 599 is fixed in the middle of the bottom of the hydraulic plate 591, and the bottom of the limiting block 599 is fixedly connected to the upper end of the connecting rod 594 through a volute spring 597;

[0042] When the top ball 592 and the squeezing ball 598 are offset, the volute spring 597 is deformed, and the limiting block 599 moves downward through the hydraulic plate 591, thereby supporting the connecting rod 594 through the limiting block 599, so that the squeezing ball 598 can support the top ball 592 again after subsequent reset, and after the sliding rod 544 is reset, the reaction force generated by the volute spring 597 causes the connecting rod 594 to rotate in the opposite direction and reset, so that the adjustment process can continue to run effectively.

[0043] The biopsy device is internally provided with a parameter setting module and an automatic adjustment module. The parameter setting module is used by medical personnel to set the pressure of the negative pressure pump 52 when extracting the biopsy, and the automatic adjustment module is used to automatically control the rotation angle of the electric motor 541 according to the set negative pressure.

[0044] The rotation angle of the electric motor 541 is adjusted as follows: Q is the rotation angle of the electric motor 541, Q max is the maximum rotation angle of the electric motor 541, F is the negative pressure of the negative pressure pump 52, and F max is the maximum negative pressure value of the negative pressure pump 52;

[0045] When the negative pressure is large, the rotation angle of the electric motor 541 is increased, so that the arc block 547 and the top block 581 can squeeze the hose 57 more strongly and the inner diameter of the hose 57 can be smaller, so that the gas flow rate can be fully controlled, thereby controlling the extraction force and improving the safety of the operation. When the negative pressure is small, the inner diameter of the hose 57 is increased, thereby increasing the extraction force to ensure that the biopsy tissue can be smoothly extracted into the biopsy drawer for use in biopsy.

[0046] When the negative pressure of the negative pressure pump 52 reaches the maximum, Q = Q max , the slide bar 544 moves and pushes the baffle 596;

[0047] When Q max , the slide bar 544 is not in contact with the baffle 596.

[0048] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] ​Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure self-adjusting electric rotary biopsy needle, comprising a biopsy device and a negative pressure chamber (5), characterized in that: The biopsy device comprises a housing (1), an outer tube (2), an inner tube (3), a cutter head (4), a motor, a gear set and a biopsy drawer; The motor and the biopsy drawer are both arranged inside the shell (1), the outer tube (2) is fixedly installed on the left end of the shell (1), the inner tube (3) is arranged inside the outer tube (2), and the cutter head (4) is fixedly connected to the inner tube (3), the output end of the motor is connected to the inner tube (3) through a gear set, and the inner tube (3) is connected to the inside of the biopsy drawer, and the negative pressure chamber (5) comprises a battery pack (51), a negative pressure pump (52), two catheters (53), a regulating chamber (54), an end cover (55) and a negative pressure tube (56); A hole is provided at the top of the negative pressure chamber (5), and an end cover (55) covers the hole for sealing. The two ends of the negative pressure tube (56) are respectively connected to one of the catheters (53) and the inside of the biopsy drawer, and are inserted into the end cover (55). A hose (57) is connected between the two catheters (53). Through holes are provided above and below the two regulating chambers (54), and the two catheters (53) are respectively fixedly inserted into the through holes. The hose (57) is located inside the regulating chamber (54). The battery pack (51) and the negative pressure pump (52) are both fixedly installed at the bottom of the inner wall of the negative pressure chamber (5). The battery pack (51) is respectively connected to the negative pressure pump (52) and the motor wire, and the negative pressure pump (52) is connected to another catheter (53).

2. The negative pressure self-adjusting electric rotary biopsy needle according to claim 1, characterized in that: An electric motor (541) is fixed on the right side of the inner wall of the regulating chamber (54), and a gear (542) is fixedly connected to the output end of the electric motor (541), a fixed plate (543) is fixed on one side of the gear (542), a sliding rod (544) is slidably connected in the middle of the fixed plate (543), a limiting block (545) is fixed on the outer side of the sliding rod (544), a pressing spring (546) is fixed between the limiting block (545) and the fixed plate (543), and an arc block (547) is fixed on the outer end of the sliding rod (544), and the arc block (547) contacts the hose (57) after rotation; A telescopic joint (58) is fixed to the right side of the inner wall of the regulating chamber (54), a top block (581) is fixed to the left end of the telescopic joint (58), and the left side of the top block (581) is in contact with the right side of the hose (57).

3. The negative pressure self-adjusting electric rotary biopsy needle according to claim 2, characterized in that: A hydraulic chamber (59) is fixed above the inner wall of the regulating chamber (54), a hydraulic plate (591) is slidably connected to the inner wall of the hydraulic chamber (59), and top balls (592) are fixed on both left and right sides of the lower surface of the hydraulic plate (591); A sliding hole is provided below the hydraulic chamber (59), and a connecting rod (594) is slidably connected in the sliding hole. A plurality of toothed rings (595) are fixed to the outer ring of the connecting rod (594), and the toothed rings (595) are meshed with the gear (542). The top of the hydraulic chamber (59) is connected to a pipeline between the telescopic joint (58). Two squeezing balls (598) are fixed to the left and right sides of the upper end of the connecting rod (594), and the two squeezing balls (598) are in contact with the two top balls (592) respectively.

4. The negative pressure self-adjusting electric rotary biopsy needle according to claim 3, characterized in that: An elastic spring (593) is fixed between the hydraulic plate (591) and the upper part of the inner wall of the hydraulic chamber (59); A baffle (596) is fixed to one side of the connecting rod (594), and the sliding rod (544) contacts the baffle (596) after moving.

5. The negative pressure self-adjusting electric rotary biopsy needle according to claim 4, characterized in that: A spiral spring (597) is connected between the upper end of the connecting rod (594) and the bottom of the hydraulic plate (591).

6. The negative pressure self-adjusting electric rotary biopsy needle according to claim 5, characterized in that: A limiting block (599) is fixed in the middle of the bottom of the hydraulic plate (591), and the bottom of the limiting block (599) is fixedly connected to the upper end of the connecting rod (594) via a spiral spring (597).

7. The negative pressure self-adjusting electric rotary biopsy needle according to claim 6, characterized in that: The biopsy device is provided with a parameter setting module and an automatic adjustment module, wherein the parameter setting module is used by medical personnel to set the pressure of the negative pressure pump (52) when extracting the biopsy, and the automatic adjustment module is used to automatically control the rotation angle of the electric motor (541) according to the set negative pressure. The rotation angle of the electric motor (541) is adjusted in the following manner: Q is the rotation angle of the electric motor (541), Q max is the maximum rotation angle of the electric motor (541), F is the negative pressure of the negative pressure pump (52), and F max is the maximum negative pressure value of the negative pressure pump (52).

8. The negative pressure self-adjusting electric rotary biopsy needle according to claim 7, characterized in that: When the negative pressure of the negative pressure pump (52) reaches the maximum, Q = Q max , the slide bar (544) moves and pushes the baffle (596); When Q max When the sliding bar (544) is not in contact with the baffle (596).​

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