Pressure compensation system of rotary-cut biopsy needle
By using the pressure compensation system of the rotary biopsy needle, the internal pressure balance of the rotary biopsy needle is maintained under negative pressure by utilizing the aspiration and replenishment lines, which solves the problem of secondary injury to the human body in the existing technology and realizes safe tissue extraction and drug injection.
Patent Information
- Application Number
- CN202422894656.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-11-26
AI Technical Summary
Existing biopsy needles can easily cause secondary damage when extracting human tissue, and air can be introduced during the injection of medication, leading to further harm to the human body.
A pressure compensation system for a rotary biopsy needle was designed, including an aspiration line, a replenishment line, a drug injection line, and an extraction line. The system maintains the internal pressure balance of the rotary biopsy needle by controlling valves and an injection pump, preventing the entry of human tissue and air.
It effectively prevents secondary damage to the human body caused by the biopsy needle under negative pressure, and maintains internal pressure balance during drug injection to prevent air from entering the body, thus improving the safety of the procedure.
Smart Images
Figure CN223787644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a pressure compensation system for a rotary biopsy needle. Background Technology
[0002] With the continuous increase in the incidence of breast cancer in recent years, there is an urgent need for improved detection, diagnosis, and treatment. When clinical examinations, including imaging, cannot provide a clear diagnosis, surgical biopsy and fine-needle aspiration biopsy can be considered. Surgical biopsy involves a large incision and leaves a noticeable scar, which can be harmful to the patient, especially if the lesion is benign. Fine-needle aspiration biopsy involves sampling and minimally invasive removal of the lesion, and is a minimally invasive procedure. It results in a small incision, minimal scarring, and reduced harm to the patient and postoperative complications. It is now a routine surgical procedure for the diagnosis and treatment of breast tumors and has become a commonly used technique in breast surgery.
[0003] Current methods for extracting excised human tissue using rotary biopsy needles involve connecting a negative pressure tube to an adjustable suction pump. The pump creates a stable air pressure circuit between the inner and outer tubes of the rotary biopsy needle and the negative pressure tube, drawing the excised tissue into a tissue collector. Air then enters through the gap between the inner and outer tubes to fill the space left after tissue extraction. However, because the gap between the inner and outer tubes is small and uncontrollable, excess tissue may be extracted during the process, causing secondary harm to the patient. Furthermore, existing rotary biopsy needles introduce air during drug injection, which can also cause harm. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a pressure compensation system for a rotary biopsy needle. This compensation system can compensate for pressure during the extraction of human tissue, preventing secondary damage to the body.
[0005] This utility model is achieved through the following technical solution:
[0006] A pressure compensation system for a rotary biopsy needle, the rotary biopsy needle including a needle tube inserted into the human body and a tissue collector, the tissue collector being used to collect human tissue cut by the rotary biopsy needle, one end of the tissue collector being connected to the needle tube, the pressure compensation system including an air intake line, one end of the air intake line being connected to the other end of the tissue collector and the other end of the air intake line being connected to the main unit, a negative pressure air intake valve being provided on the air intake line to control the opening and closing of the air intake line, the pressure compensation system also including a replenishment line, one end of the replenishment line being connected to the needle tube and the other end being connected to external air, a first equalizing valve being provided on the replenishment line to control the opening and closing of the replenishment line;
[0007] When negative pressure sampling is performed, the first equalizing valve and the negative pressure air inlet valve are opened. Under the negative pressure provided by the main unit, external air enters through the air replenishment line and passes through the needle tube, tissue collector and aspiration line in sequence. The human tissue cut by the rotary biopsy needle, along with the air entering the needle tube, reaches the tissue collector from the needle tube.
[0008] Furthermore, the pressure compensation system also includes a drug inlet pipeline, one end of which is connected to the air supply pipeline and the other end is connected to a liquid drug container.
[0009] Furthermore, the connection point between the drug delivery line and the gas supply line is located between the syringe and the first equalizing valve.
[0010] Furthermore, a drug inlet valve is installed on the drug inlet pipeline to control the opening and closing of the drug inlet pipeline.
[0011] Furthermore, an injection pump is installed on the drug inlet pipeline, located between the drug solution pack and the drug inlet valve.
[0012] Furthermore, the pressure compensation system also includes an air extraction line, one end of which is connected to the air intake line and the other end is connected to the main unit.
[0013] Furthermore, the connection point between the suction line and the inhalation line is located between the tissue collector and the negative pressure inhalation valve.
[0014] Furthermore, a second pressure equalization valve is installed on the extraction pipeline to control the on / off state of the extraction pipeline.
[0015] Furthermore, the needle includes an inner needle tube that is connected to a tissue collector.
[0016] Furthermore, the needle tube also includes an outer needle tube, which includes a first inner cavity and a second inner cavity that are interconnected. The inner needle tube is housed in the first inner cavity, and the air supply line is connected to the second inner cavity.
[0017] Compared with existing technologies, the advantages of this utility model are:
[0018] 1. By setting up an air supply line, external air is supplied during the process of aspirating the cut human tissue through the suction line, maintaining the pressure balance inside the rotary biopsy needle and preventing other human tissue from entering the rotary biopsy needle under negative pressure, thereby avoiding secondary damage to the human body.
[0019] 2. By setting up a pressure compensation system, it is used to extract human lesion tissue under negative pressure and to compensate for pressure during the injection of medicine, so as to prevent secondary damage to the human body.
[0020] 3. By setting up a drug inlet line and an air extraction line during the injection process, the drug enters through the drug inlet line and squeezes the air inside the biopsy needle, causing it to be discharged through the air extraction line. This maintains the pressure balance inside the biopsy needle, prevents air from entering the human body, and thus avoids secondary damage to the human body.
[0021] 4. An injection pump is installed between the drug solution pack and the drug inlet valve to ensure that the drug solution can smoothly enter the biopsy needle. Attached Figure Description
[0022] Figure 1 This is a three-dimensional assembly diagram of a breast biopsy needle according to an embodiment of the present invention;
[0023] Figure 2 This is a 3D assembly drawing of the syringe;
[0024] Figure 3 This is an exploded view of the syringe;
[0025] Figure 4 This is a cross-sectional view of the syringe;
[0026] Figure 5 A schematic diagram of the intake and make-up air lines;
[0027] Labeling Explanation: 1. Rotary cutting needle body; 2. Tissue collector; 3. Needle tube; 31. Outer needle tube; 311. First inner cavity; 312. Second inner cavity; 313. First window; 32. Inner needle tube; 322. Blade; 33. Partition; 331. Second window; 34. Puncture head; 341. Boss; 35. Connecting sleeve; 351. Wire groove; 352. Pipe joint; 41. Camera; 42. Cable; 43. Reflecting mirror; 51. First equalizing valve; 52. Negative pressure inlet valve; 53. Suction line; 54. Air replenishment line; 61. Second equalizing valve; 62. Drug inlet valve; 63. Suction line; 64. Drug inlet line; 65. Injection pump; 8. Drug solution pack. Detailed Implementation
[0028] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0029] like Figure 1 As shown, an embodiment of the present invention provides a breast biopsy needle, comprising a biopsy needle body 1, a tissue collector 2, a needle tube 3, and a pressure compensation system. The biopsy needle body 1 is prior art, convenient for medical personnel to hold and operate. The front end of the biopsy needle body 1 is connected to the needle tube 3, and the rear end is connected to the tissue collector 2. The tissue collector 2 is prior art, used to collect human tissue excised by the biopsy needle. The pressure compensation system is used to extract human tissue under negative pressure and to compensate for pressure during drug injection, preventing secondary damage to the human body.
[0030] like Figure 2 and Figure 3 As shown, the needle tube 3 includes an outer needle tube 31, an inner needle tube 32, and a puncture head 34. The outer needle tube 31 is internally continuous, with its tail end connected to the rotary cutting needle body 1 and its front end connected to the puncture head 34. The puncture head 34 has a spike-like, pyramidal shape to reduce the resistance of the outer needle tube 31 when it pierces human tissue. The inner needle tube 32 is located inside the outer needle tube 31, with a gap between them. The tail end of the inner needle tube 32 passes through the rotary cutting needle body 1 and communicates with the tissue collector 2. The front end of the inner needle tube 32 has a sharp cutting edge 322 for rotary cutting of the lesion tissue. The outer needle tube 31 has a first window 313 near the puncture head 34. The cutting edge 322 at the front end of the inner needle tube 32 is located inside the first window 313. The cutting edge 322 of the inner needle tube 32 contacts and rotates with the lesion tissue of the human body, providing convenience for the cutting edge 322 of the inner needle tube 32 to cut the human tissue.
[0031] Further reference Figure 3 and Figure 4 The needle tube 3 also includes a partition 33. The partition 33 is housed inside the outer needle tube 31 and abuts against the inner wall of the outer needle tube 31, dividing the interior of the outer needle tube 31 into a first inner cavity 311 and a second inner cavity 312. Furthermore, a second window 331 is provided on the partition 33 near the puncture head 34, allowing communication between the first inner cavity 311 and the second inner cavity 312. Specifically, the first window 313 is located on the side wall of the first inner cavity 311, and the inner needle tube 32 is housed within the first inner cavity 311.
[0032] The biopsy needle also includes a camera 41 and a reflective mirror 43 housed in the second inner cavity 312. The reflective mirror 43 is disposed on the puncture head 34. Specifically, the puncture head 34 extends into the second inner cavity 312 of the needle tube 31 and forms a protrusion 341. The connection between the puncture head 34 and the protrusion 341 is mirror-finished to form the reflective mirror 43. By mirror-finishing the connection between the puncture head 34 and the protrusion 341 to form a concave reflective mirror 43, the reflective effect can be increased. Furthermore, the reflective mirror 43 allows observation of human tissue located in the first window 313 through the second window 331. Therefore, human tissue located in the first window 313 can be captured by the camera 41 through the reflection of the reflective mirror 43, allowing for direct observation of the human tissue.
[0033] Furthermore, a cable 42 is connected to the end of the camera 41, and a connecting sleeve 35 is provided at the end of the outer needle tube 31. A wire groove 351 is provided on the connecting sleeve 35, and the cable 42 passes through the wire groove 351 to connect to the host (not shown in the figure). The front end of the camera 41 abuts against the end of the boss 341. A lighting lamp (not shown in the figure) is provided at the front end of the camera 41 to provide supplementary lighting during the operation of the camera 41, so that the image captured by the camera 41 is clearer. The lighting lamp is preferably an LED lamp.
[0034] Furthermore, the light from the lighting lamp is reflected by the reflector 43 and passes through the first window 313 and the second window 331 to the human tissue, so that the camera 41 can clearly capture the lesion tissue of the human body.
[0035] refer to Figure 5 The pressure compensation system includes an inhalation line 53 and a supplementary air line 54. One end of the inhalation line 53 is connected to the tissue collector 2, and the other end is connected to the main unit (not shown in the figure). The main unit provides negative pressure to the inhalation line 53. A negative pressure inlet valve 52 is installed on the inhalation line 53 to control its on / off state. One end of the supplementary air line 54 is connected to the needle tube 3, and the other end is connected to external air. Specifically, the supplementary air line 54 is connected to the second inner cavity 312 of the outer needle tube 31. A first equalizing valve 51 is installed on the supplementary air line 54 to control its own on / off state.
[0036] Refer again Figure 1 The pressure compensation system also includes a drug inlet line 64 and a suction line 63. One end of the drug inlet line 64 is connected to the supplemental air line 54, and the other end is connected to the drug solution package 8. Specifically, the connection point between the drug inlet line 64 and the supplemental air line 54 is located between the needle tube 3 and the first equalizing valve 51. Furthermore, a drug inlet valve 62 is provided on the drug inlet line 64 to control its on / off state. Further, an injection pump 65 is also provided on the drug inlet line 64, located between the drug solution package 8 and the drug inlet valve 62, allowing the drug solution to smoothly enter the biopsy needle. One end of the suction line 63 is connected to the aspiration line 53, and the other end is connected to the main unit. Specifically, the connection point between the suction line 63 and the aspiration line 53 is located between the tissue collector 2 and the negative pressure inlet valve 52. Furthermore, a second equalizing valve 61 is provided on the suction line 63 to control its on / off state.
[0037] During negative pressure sampling, the second equalizing valve 61, the drug inlet valve 62, and the injection pump 65 are closed, while the first equalizing valve 51 and the negative pressure air inlet valve 52 are opened. Under the negative pressure provided by the main unit, external air enters through the air replenishment line 54 and passes sequentially through the second inner cavity 312 of the outer needle tube 31, the second window 331, the first inner cavity 311 of the outer needle tube 31, the inner needle tube 32, the tissue collector 2, and the suction line 53. The rotary cutting needle body 1 drives the inner needle tube 32 towards the puncture head 34 and performs rotary cutting on the diseased human tissue. The human tissue cut by the rotary cutting biopsy needle, along with the air entering the first inner cavity 311, enters the tissue collector 2 through the inner needle tube 32. By setting up the air replenishment line 54 to supplement external air during the suction of the cut human tissue by the suction line 53, the pressure balance inside the rotary cutting biopsy needle is maintained, preventing other human tissue from entering the rotary cutting biopsy needle under negative pressure suction, thereby avoiding secondary damage to the human body.
[0038] During drug injection, the first equalizing valve 51 and the negative pressure air inlet valve 52 are closed, while the second equalizing valve 61, the drug inlet valve 62, and the injection pump 65 are opened. Driven by the injection pump 65, the drug solution in the drug package 8 enters through the drug inlet line 64 and sequentially passes through the air replenishment line 54, the second inner cavity 312 of the outer needle tube 31, the second window 331, and the first inner cavity 311 of the outer needle tube 31. During negative pressure sampling, the air remaining in the biopsy needle is compressed by the drug solution and sequentially passes through the air replenishment line 54, the second inner cavity 312 of the outer needle tube 31, the second window 331, the first inner cavity 311 of the outer needle tube 31, the inner needle tube 32, the tissue collector 2, the suction line 53, and the aspiration line 63, and is then discharged into the atmosphere. When the camera 41 observes that there is sufficient medication in the first inner cavity 313, and there is no air residue inside the biopsy needle, the second pressure equalization valve 61 is closed, and the medication enters the body through the first window 313. By setting up a medication inlet line 64 and an air extraction line 63 during the medication injection process, the medication enters through the medication inlet line 64 and compresses the air inside the biopsy needle, causing it to be expelled through the air extraction line 63. This maintains the pressure balance inside the biopsy needle, prevents air from entering the body, and thus avoids secondary harm to the body.
[0039] This invention provides a breast biopsy needle that uses a reflective mirror 43 to reflect human tissue located at the first window 313, allowing for direct observation of the tissue. An illumination lamp is provided to supplement the light during camera 41 operation, enhancing image clarity. A partition 33 within the outer needle tube 31 divides it into a first inner cavity 311 and a second inner cavity 312, separating the inner needle tube 32 from the camera 41 and preventing damage during use. The puncture head 34 is designed with a pyramidal spike to reduce resistance when the outer needle tube 31 pierces the human tissue. A pressure compensation system is incorporated to compensate for pressure during extraction of lesions under negative pressure and during drug injection, preventing secondary harm to the patient. By incorporating an air supply line 54 during the suction of the cut human tissue via the suction line 53, external air is supplied, maintaining the pressure balance inside the biopsy needle and preventing other human tissue from entering the needle under negative pressure, thus avoiding secondary harm to the human body. Similarly, by incorporating a drug inlet line 64 and an air extraction line 63 during drug injection, the drug enters through the drug inlet line 64 and compresses the air inside the biopsy needle, causing it to exit through the air extraction line 63. This maintains the pressure balance inside the biopsy needle, preventing air from entering the human body and thus avoiding secondary harm.
[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A pressure compensation system for a rotary biopsy needle, the rotary biopsy needle comprising a needle tube (3) inserted into the human body and a tissue collector (2), the tissue collector (2) being used to collect human tissue cut by the rotary biopsy needle, one end of the tissue collector (2) being connected to the needle tube (3), the pressure compensation system comprising an air intake line (53), one end of the air intake line (53) being connected to the other end of the tissue collector (2) and the other end of the air intake line (53) being connected to a main unit, the air intake line (53) being provided with a negative pressure air intake valve (52) for controlling the opening and closing of the air intake line (53), characterized in that, The pressure compensation system also includes an air supply line (54), one end of which is connected to the needle tube (3) and the other end is connected to the outside air. A first equalizing valve (51) is provided on the air supply line (54) to control the opening and closing of the air supply line (54). When negative pressure sampling is performed, the first equalizing valve (51) and the negative pressure air inlet valve (52) are opened. Under the negative pressure provided by the host, the external air enters through the air replenishment line (54) and passes through the needle tube (3), the tissue collector (2) and the suction line (53) in sequence. The human tissue cut by the rotary biopsy needle, along with the air entering the needle tube (3), reaches the tissue collector (2) from the needle tube (3).
2. The pressure compensation system for a rotary biopsy needle according to claim 1, characterized in that, The pressure compensation system also includes a drug inlet pipeline (64), one end of which is connected to the gas supply pipeline (54) and the other end is connected to a liquid medicine pack (8).
3. The pressure compensation system for a rotary biopsy needle according to claim 2, characterized in that, The connection point between the drug inlet line (64) and the gas replenishment line (54) is located between the needle tube (3) and the first pressure equalizing valve (51).
4. The pressure compensation system for a rotary biopsy needle according to claim 2, characterized in that, The drug inlet pipeline (64) is equipped with a drug inlet valve (62) for controlling the opening and closing of the drug inlet pipeline (64).
5. The pressure compensation system for a rotary biopsy needle according to claim 4, characterized in that, An injection pump (65) is also provided on the drug inlet pipeline (64), and the injection pump (65) is located between the drug solution package (8) and the drug inlet valve (62).
6. The pressure compensation system for a rotary biopsy needle according to claim 2, characterized in that, The pressure compensation system also includes an air extraction pipe (63), one end of which is connected to the air intake pipe (53) and the other end is connected to the host.
7. The pressure compensation system for a rotary biopsy needle according to claim 6, characterized in that, The connection point between the suction line (63) and the inhalation line (53) is located between the tissue collector (2) and the negative pressure inlet valve (52).
8. The pressure compensation system for a rotary biopsy needle according to claim 6, characterized in that, The extraction pipeline (63) is equipped with a second pressure equalization valve (61) for controlling the opening and closing of the extraction pipeline (63).
9. The pressure compensation system for a rotary biopsy needle according to claim 1, characterized in that, The needle tube (3) includes an inner needle tube (32) which is connected to the tissue collector (2).
10. The pressure compensation system for a rotary biopsy needle according to claim 9, characterized in that, The needle tube (3) also includes an outer needle tube (31), which includes a first inner cavity (311) and a second inner cavity (312) that are interconnected. The inner needle tube (32) is housed in the first inner cavity (311), and the air supply line (54) is connected to the second inner cavity (312).