A crossbow-style prostate puncture gun with adjustable puncture depth

Abstract

This invention relates to a crossbow-type prostate biopsy gun with adjustable puncture depth, belonging to the field of medical device technology. It includes a piercing needle, a detachable puncture needle, a needle core, a limiter, a chamber, a support plate, a bolt-action mechanism, a loading device, a firing device, a safety device, and a needle magazine. One end of the support plate is fixed with the piercing needle, which contains a puncture needle with a needle core inserted into it; the length of the puncture needle is shorter than the length of the needle core. The rear ends of both the puncture needle and the needle core have baffle-like protrusions. The support plate surface has a chamber, a bolt-action mechanism, a loading device, and a firing device corresponding to the baffle-like protrusions. The front end of the support plate has a limiter for adjusting the puncture depth. The support plate also has a puncture needle removal device and a needle magazine for storing and releasing puncture needles one by one. The end of the needle core near the needle tip has a tissue groove. This invention provides a biopsy gun with adjustable puncture depth, prevention of needle tract implantation, and rapid puncture capability.

Description

Technical Field

[0001] This invention relates to a crossbow-type prostate puncture gun with adjustable puncture depth, belonging to the field of medical device technology. Background Technology

[0002] In recent years, the incidence of prostate cancer in my country has been rising year by year. Unlike other tumors, prostate cancer is multifocal and scattered in the prostate gland. It is often impossible to make a diagnosis by imaging methods such as CT and MRI. A diagnosis is always made by prostate biopsy. About 20%-30% of elderly patients with elevated prostate-specific antigen (PSA) during physical examinations are diagnosed with prostate cancer by biopsy. At present, prostate biopsy is mostly a 12-needle systematic puncture. Even so, cancer tissue is not obtained in some patients. As PSA continues to rise significantly, a second puncture is required. In the existing technology, the prostate puncture needle is a stainless steel needle with an outer diameter of 0.9 mm and a built-in needle core. The tissue groove of the needle core is 2 cm long, and the length of the prostate tissue strip obtained is less than 2 cm. After the puncture needle is inserted into the prostate capsule, the puncture needle and needle core are ejected into the gland about 2.5 cm by spring ejection to complete the puncture. The prostate puncture needle in the existing technology has the following defects: (1) The insertion distance cannot be adjusted and the length of the tissue strip is fixed. The current puncture depth of the puncture needle is fixed, and the length of the tissue strip is less than 2 cm. The prostate volume varies greatly. For small prostates, the puncture needle ejection distance is not adjustable, and the puncture distance is relatively long, which may damage the urethra and cause hematuria. For large prostates, the puncture distance is relatively short, and the tissue obtained is relatively small, leaving a large number of puncture blind areas. (2) There is a risk of needle tract implantation. After the current puncture needle is used to remove tissue, it needs to be completely withdrawn, the tissue strip is placed in fixative, and then the needle is reinserted for the next puncture. In the case of tumor patients, the puncture needle contaminated with tumor cells repeatedly enters and exits the skin and subcutaneous tissue, which theoretically may lead to tumor implantation in the needle tract. Although there is currently no clinical evidence to prove the metastasis of prostate puncture needle tract, this possibility does exist in theory. (3) The overall puncture time is long. The characteristic of prostate puncture is that there are many puncture needles, and each patient needs to be punctured no less than 12 times. Most current puncture needles are either single-use or reusable. Single-use puncture guns integrate the needle and handle, one gun per person, and the entire gun is replaced after puncture. Reusable puncture guns require the puncture needle and handle to be integrated before puncture, one needle per person, and the puncture needle is replaced after 12 punctures, while the handle is reused. Regardless of the type of puncture gun, after each puncture, the puncture needle and needle core must be pulled out, the needle core is removed to expose the tissue scaffold, the tissue is taken out, and the needle is re-inserted into the skin for the next puncture. The total puncture time is significantly extended. (4) It is not conducive to material conservation and environmental protection; most current puncture needles are single-use, consisting of a puncture needle, needle core, spring, and plastic handle, which are discarded after use, causing material waste and environmental pollution. Therefore, in summary, this technical field urgently needs a puncture gun with adjustable puncture depth, which can prevent needle tract implantation and can perform rapid puncture. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problem of how to obtain a puncture gun with adjustable puncture depth, which can prevent needle tract implantation and enable rapid puncture.

[0004] To address the aforementioned problems, the present invention provides a crossbow-type prostate puncture gun with adjustable puncture depth, comprising a piercing needle, a detachable puncture needle, a needle core, a limiter, a chamber, a support plate, a bolt-action mechanism, a loading device, a firing mechanism, a safety device, and a needle magazine. One end of the support plate has a hollow piercing needle with openings at both ends, and a cavity for accommodating the puncture needle is provided between the two ends of the piercing needle opening. A needle core is inserted into the cavity of the hollow puncture needle. A chamber for accommodating the puncture needle is provided on one side of the support plate corresponding to the piercing needle cavity. A bolt-action mechanism and a loading device are provided on the other side of the support plate. The puncture needle and needle core... Each of the needle cores has a baffle-like protrusion at the end furthest from the needle tip. The baffle-like protrusions of the puncture needle and the needle core are respectively located on both sides of the piercing needle body. A firing device for firing the puncture needle and the needle core is provided on the support plate corresponding to the baffle-like protrusion. A safety device for limiting the activation of the firing device is provided on the support plate. A movable limiter for limiting the position of the puncture needle and the needle core and for adjusting the puncture depth is provided at the end of the support plate near the piercing needle. The support plate also has a removal device for removing the puncture needle and a needle chamber for storing and releasing the puncture needles one by one. A tissue groove is provided at the end of the needle core near the needle tip along the length direction of the needle core body. The length of the puncture needle is less than the length of the needle core.

[0005] Preferably, the limiter includes two positions that define the positions of the puncture needle and the needle core, respectively, and the distance between the two positions is equal to the difference in length between the puncture needle and the needle core; the side of the support plate is provided with a scale for displaying the position.

[0006] Preferably, the support plate includes a front baffle, a rear baffle, and a bottom plate; the bottom plate has a front baffle and a rear baffle that are perpendicular to each other; the front baffle has a through hole, and a hollow piercing needle is provided in the through hole along the central axis of the bottom plate towards the outside of the support plate; a gun barrel for placing the piercing needle is provided on the bottom plate surface on the same side as the piercing needle along the central axis of the bottom plate.

[0007] Preferably, two guide posts parallel to the central axis of the base plate are respectively provided on both sides of the front baffle and the rear baffle, and a firing spring is sleeved on the guide post; the end of the firing spring away from the puncture needle is fixed, and the other end is provided with a spring head for striking the puncture needle and the baffle-like protrusion of the needle core; the baffle-like protrusions of the puncture needle and the needle core are respectively provided on both sides of the central axis of the base plate.

[0008] Preferably, the firing device includes two spring limiting plates respectively provided on both sides of the central axis of the base plate, a connecting shaft provided between the two spring limiting plates, and a torsion spring sleeved on the connecting shaft; the connecting shaft is perpendicular to the central axis of the base plate; the ends of the two spring limiting plates near the puncture needle are provided with barbed protrusions for limiting the position of the spring head and releasing the spring head after being removed; the length of the end of one of the two spring limiting plates away from the puncture needle is greater than the length of the end of the other spring limiting plate away from the puncture needle; the end of the longer spring limiting plate away from the puncture needle is provided as the firing trigger.

[0009] Preferably, the safety device includes a safety block that abuts against the firing trigger and a connecting plate that is movably connected to the safety block, the connecting plate being fixed to the support plate.

[0010] Preferably, the barrel is a groove on one side of the base plate for accommodating the puncture needle body; the groove is located on the central axis of the base plate, and the end of the groove near the puncture needle is a closed end. The bottom of the groove adjacent to the closed end is provided with an opening one for the puncture needle body to pass through the base plate. On both sides near the other end of the groove, there are baffle-like protrusions for the puncture needle and needle core to pass through the base plate, and the through holes two communicate with the opening one of the groove.

[0011] Preferably, a gun-retracting bolt is provided on the base plate, and a sliding groove parallel to the groove is provided between the end of the base plate near the piercing needle and the second through hole for the gun-retracting bolt to move back and forth; the two ends of the gun-retracting bolt protrude from both sides of the base plate; the gun-retracting bolt includes a push rod and a push block; the push rod is provided in the sliding groove, one end of the push rod protrudes from the gun bore surface of the base plate and is located below the limiter position, and the other end of the push rod is connected to the push block located on the other side of the base plate.

[0012] Preferably, the loading device includes a push rod two and a push block two; the bottom of the groove away from the puncture needle is provided with a sliding groove two that passes through the base plate, the sliding groove two is connected to the bottom opening one of the groove, and the sliding groove two and the bottom opening one of the groove are provided with a push rod two that moves back and forth to push the puncture needle into the lumen of the puncture needle; the push rod two is connected to a push block two provided on the other side of the base plate.

[0013] Preferably, the upper end of the groove is provided with an opening two, and a needle chamber is provided above the opening two; the needle chamber is a hollow cylindrical shape, and a rotating shaft is provided along the central axis of the cylinder; multiple partitions are provided radially from the rotating shaft to the inner wall of the cylinder; a compartment for accommodating a puncture needle is provided between adjacent partitions, and an outlet for a puncture needle to fall from the compartment into the opening two is provided on the side wall of the needle chamber above the opening two, which communicates with a compartment.

[0014] Preferably, the baffle-like protrusion is provided with a numerical mark; the length of the tissue groove is greater than or equal to 3 cm; the outer surface of the needle core is provided with an elastic barb structure, and the lumen sidewall of the puncture needle is provided with a protrusion corresponding to the barb structure for fixing the relative position of the puncture needle and the needle core to hold the barb.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention features a puncture needle that guides the puncture needle. The rear end of the puncture needle is mounted on a support plate, which is equipped with an ejection system. The puncture needle and needle core are placed in the puncture needle at its front. A limiter on the support plate adjusts the ejection distance of the puncture needle and needle core. After puncture, the puncture needle with the needle core withdraws from the puncture needle, ensuring that the needle core, which hooks tissue, does not contact tissue outside the needle tract, thus preventing tumor implantation. After each puncture, the puncture needle and needle core are automatically ejected, and a new puncture needle and needle core are immediately released from the needle chamber to complete the next puncture. After 12 punctures, the tissue is retrieved together according to the number on the needle core and sent for pathological examination. This invention allows adjustment of the needle insertion depth, control of tissue block length, and prevention of implantation, saving puncture time. Furthermore, except for the puncture needle and needle core, which are disposable, the entire system is reusable, further saving materials and making it more economical and environmentally friendly. The entire system is made of metal and can be autoclaved, ensuring aseptic technique is followed throughout the operation.

[0017] Specific beneficial effects include:

[0018] 1. This invention enables the puncture depth of the puncture needle to be adjusted according to the situation, with the puncture depth adjustable between 1 and 3.5 cm. For small-volume prostates, it avoids damage to the urethra or rectum due to excessive puncture depth; for large-volume prostates, it avoids the problems of relatively insufficient puncture depth and excessively large puncture blind zone.

[0019] 2. The puncture needle guides the aspiration needle to the prostate capsule. After the aspiration needle core pierces the prostate tissue and the specimen is removed, the aspiration needle core protects the aspiration needle and the outer wall of the needle core from contacting the needle tract tissue outside the prostate capsule, thus theoretically preventing the tumor from implanting in the needle tract.

[0020] 3. This invention simplifies the puncture process and saves puncture time. Unlike traditional puncture guns, the puncture needle and core provided by this invention are similar to crossbow bolts, contacting but not connected to the ejection device. After puncturing and obtaining tissue, pulling back the bolt allows the puncture needle and core to automatically dislodge. After the 12-needle system is completed, tissue is obtained from different sites one by one according to the puncture needle number. This avoids redundant actions and processes such as completely withdrawing the needle, removing the core, taking out the tissue, reassembling, disinfecting the skin again, and puncturing again after each puncture.

[0021] 4. It is more conducive to adhering to aseptic principles. The entire system can be autoclaved and sterilized as a whole. After puncture, the bolt pulls the puncture needle back until it reaches the rear of the chute. The left and right protrusions at the rear of the puncture needle and needle core then detach automatically from the through-hole and are ejected from below. If used on a puncture robot, a needle magazine can be installed above the puncture tray. New puncture needles are released from the magazine and placed on the tray, ready for the next puncture. The entire process does not require the operator to touch the puncture needle, avoiding bacterial contamination.

[0022] 5. The puncture gun provided by this invention is more material-efficient and environmentally friendly. Currently, most puncture guns used in clinical practice are single-use, one gun per person, and discarded after use. The puncture needle, needle core, two springs, and plastic handle are all disposable consumables. Because the puncture needle requires strong ejection force to penetrate the gland, and the needle is relatively thin, bending and deformation can occur after multiple punctures, sometimes requiring two guns per person, further wasting materials and causing environmental problems. The puncture gun provided by this invention is reusable; only the puncture needle and needle core are consumables. Attached Figure Description

[0023] Figure 1 This is a side view of the overall design of the adjustable puncture depth crossbow-type prostate puncture gun of the present invention.

[0024] Figure 2 This is a side cross-sectional view of the puncture needle of a crossbow-type prostate puncture gun with adjustable puncture depth according to the present invention.

[0025] Figure 3 This is a side view of the puncture needle of a crossbow-type prostate puncture gun with adjustable puncture depth according to the present invention.

[0026] Figure 4 This is a schematic diagram of the puncture needle structure of a crossbow-type prostate puncture gun with adjustable puncture depth according to the present invention.

[0027] Figure 5 This is a schematic diagram of the needle core structure of a crossbow-type prostate puncture gun with adjustable puncture depth according to the present invention.

[0028] Figure 6 This is a schematic diagram of the puncture needle and needle core assembly of a crossbow-type prostate puncture gun with adjustable puncture depth according to the present invention.

[0029] Figure 7 This is a three-dimensional schematic diagram of a crossbow-type prostate puncture gun stock with adjustable puncture depth according to the present invention.

[0030] Figure 8 This is a top view schematic diagram of a crossbow-type prostate puncture gun limiter with adjustable puncture depth according to the present invention.

[0031] Figure 9This is a three-dimensional schematic diagram of a crossbow-type prostate puncture gun firing device with adjustable puncture depth according to the present invention.

[0032] Figure 10 This is a cross-sectional schematic diagram of the needle chamber of a repeating crossbow-type prostate puncture gun with adjustable puncture depth according to the present invention.

[0033] Figure 11 This is a cross-sectional schematic diagram of the operating end of the needle chamber of a crossbow-type prostate puncture gun with adjustable puncture depth according to the present invention.

[0034] Figure 12 This is a three-dimensional schematic diagram of the needle chamber of a crossbow-type prostate puncture gun with adjustable puncture depth according to the present invention.

[0035] Figure 13 This is a top view of the adjustable puncture depth repeating crossbow-type prostate puncture gun of the present invention in the unfired state.

[0036] Figure 14 This is a top view of the state of the adjustable puncture depth crossbow-type prostate puncture gun after firing, according to the present invention.

[0037] Figure 15 This is a top view schematic diagram of the base plate of a crossbow-type prostate puncture gun with adjustable puncture depth according to the present invention.

[0038] Figure 16 This is a top view of the base plate of the adjustable puncture depth crossbow-type prostate puncture gun of the present invention when the puncture needle falls into the groove at the initial state.

[0039] Figure 17 for Figure 15 Schematic diagram of the cross-section of the base plate at point A in the middle;

[0040] Figure 18 for Figure 15 Schematic diagram of the cross-section of the base plate at point B in the middle;

[0041] Figure 19 for Figure 15 Schematic diagram of the cross-section of the base plate at point C;

[0042] Figure 20 for Figure 15 Schematic diagram of the cross-section of the base plate at point D;

[0043] Figure 21 for Figure 15 Schematic diagram of the cross-section of the base plate at point E in the middle;

[0044] Reference numerals: 1. Piercing needle; 2. Puncture needle; 21. Puncture needle baffle-like protrusion; 3. Needle core; 31. Tissue groove; 32. Needle core baffle-like protrusion; 4. Support plate; 41. Front baffle; 42. Rear baffle; 43. Left guide post; 44. Right guide post; 45. Chamber; 46. Base plate; 47. Through hole one; 48. Scale; 49. Groove; 491. Bottom closed end; 492. Opening one; 493. Through hole two; 494. Slide one; 495. Slide two; 496. Opening two; 5. Firing spring; 51. Left spring; 52. Right spring; 53. Left spring head; 54. Right spring head; 6. Limiter 61. Forward position; 62. Rear position; 7. Bolt; 71. Push rod one; 72. Push block one; 8. Firing device; 81. Left spring limit plate; 82. Right spring limit plate; 83. Connecting shaft; 84. Barbed protrusion; 85. Torsion spring; 86. Firing trigger; 9. Safety device; 91. Connecting plate; 92. Safety block; 10. Needle magazine; 101. Cylindrical metal box; 102. Exit port; 103. Rotating shaft; 104. Slot; 105. Rivet; 106. Rotary knob; 11. Loading device; 111. Push rod two; 112. Push block two; 12. Barb structure; 13. Protrusion. Detailed Implementation

[0045] To make the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings:

[0046] like Figure 1-21As shown, the technical solution adopted by the present invention is to provide a crossbow-type prostate puncture gun with adjustable puncture depth, including a piercing needle 1, a detachable puncture needle 2, a needle core 3, a limiter 6, a chamber 45, a support plate 4, a bolt-action 7, a loading device 11, a firing device 8, a safety device 9, and a needle magazine 10; one end of the support plate 4 is provided with a hollow piercing needle 1 with openings at both ends, and a cavity for accommodating the puncture needle 2 is provided between the two ends of the opening of the piercing needle 1; the needle core 3 is inserted into the cavity of the hollow puncture needle 2; a chamber 45 for accommodating the puncture needle 2 is provided on one side of the support plate 4 corresponding to the cavity of the piercing needle 1; a bolt-action 7 and a loading device 11 passing through the support plate 4 are provided on the other side of the support plate 4; the puncture needle 2 and the needle core... Each of the three needles has a baffle-like protrusion at the end away from the needle tip. The baffle-like protrusions of the puncture needle 2 and the needle core 3 are respectively located on both sides of the needle body of the puncture needle 1. The support plate 4 corresponding to the baffle-like protrusion is provided with a firing device 8 for firing the puncture needle 2 and the needle core 3. The support plate 4 is provided with a safety device 9 for limiting the activation of the firing device. The end of the support plate 4 near the puncture needle 1 is provided with a movable limiter 6 for limiting the position of the puncture needle 2 and the needle core 3 and for adjusting the puncture depth. The support plate 4 is also provided with a removal device for removing the puncture needle 2 and a needle chamber 10 for storing and releasing the puncture needles 2 one by one. The end of the needle core 3 near the needle tip is provided with a tissue groove 31 along the length direction of the needle body of the needle core 3. The length of the puncture needle 2 is less than the length of the needle core 3. The limiter 6 includes two positions, front and rear, that respectively limit the positions of the puncture needle 2 and the needle core 3. The distance between the two positions is equal to the difference in length between the puncture needle 2 and the needle core 3. The side of the support plate 4 is provided with a scale 48 for indicating the position. The support plate 4 includes a front baffle 41, a rear baffle 42, and a base plate 46. The base plate 46 is provided with the front baffle 41 and the rear baffle 42, which are parallel to each other. The front baffle 41 is provided with a through hole 47, and a hollow piercing needle 1 is provided in the through hole 47 along the central axis of the base plate 46 towards the outside of the support plate 4. The base plate surface on the same side as the piercing needle 1 is provided with a chamber 45 along the central axis of the base plate 46 for placing the puncture needle 2. Two guide posts parallel to the central axis of the base plate 46 are respectively provided on both sides of the front baffle 41 and the rear baffle 42 along the central axis of the base plate 46. A firing spring 5 is sleeved on the guide post. One end of the firing spring 5 away from the piercing needle 1 is fixed, and the other end is provided with a spring head for striking the baffle-like protrusions of the puncture needle 2 and the needle core 3. The baffle-like protrusions of the puncture needle 2 and the needle core 3 are respectively located on both sides of the central axis of the base plate 46.The firing device 8 includes two spring limiting plates respectively provided on both sides of the central axis of the base plate 46, and a connecting shaft 83 between the two spring limiting plates. A torsion spring 85 is sleeved on the connecting shaft 83. The connecting shaft 83 is perpendicular to the central axis of the base plate. The ends of the two spring limiting plates near the puncture needle 1 are provided with barbed protrusions 84 for limiting the position of the spring head and releasing the spring head after it is removed. The length of the end of one of the two spring limiting plates away from the puncture needle 1 is greater than the length of the end of the other spring limiting plate away from the puncture needle 1. The end of the longer spring limiting plate away from the puncture needle is set as the firing trigger 86. The safety device 9 includes a safety block 92 abutting against the firing trigger 86 and a connecting plate 91 movably connected to the safety block 92. The connecting plate 91 is fixed on the support plate 4. The chamber 45 is a groove 49 located on one side of the base plate 46 to accommodate the needle body of the puncture needle 2. The groove 49 is located on the central axis of the base plate 46. The end of the groove 49 near the puncture needle is a bottom closed end 491. The bottom of the groove 49 adjacent to the closed end 491 is provided with an opening 492 for the needle body of the puncture needle 2 to pass through the base plate 46. The two sides near the other end of the groove 49 are provided with through holes 493 for the baffle-like protrusions of the puncture needle 2 and the needle core 3 to pass through the base plate 46. The through holes 493 are connected to the opening 492 of the groove 49. A bolt 7 for retracting the gun is mounted on the base plate 46. A groove 494 parallel to the groove 49 is provided between the end of the base plate 46 near the piercing needle 1 and the through hole 493 for moving the bolt 7 back and forth. The two ends of the bolt 7 protrude from both sides of the base plate 46. The bolt 7 includes a push rod 71 and a push block 72. The push rod 71 is mounted in the groove 494. One end of the push rod 71 protrudes from the bore surface of the base plate 46 and is located below the position of the limiter 6. The other end of the push rod 71 is connected to the push block 72 located on the other side of the base plate 46. The loading device 11 includes a push rod 2 111 and a push block 2 112; the bottom of the groove 49 away from the end of the puncture needle 1 is provided with a sliding groove 2 495 that passes through the base plate 46, the sliding groove 2 495 communicates with the bottom opening 1 492 of the groove 49, and the sliding groove 2 495 and the bottom opening 1 492 of the groove 49 are provided with a push rod 2 111 that moves back and forth to push the puncture needle 2 into the lumen of the puncture needle 1; the push rod 2 111 is connected to the push block 2 112 located on the other side of the base plate 46. The upper end of the groove 49 is provided with an opening 496, and a needle chamber 10 is provided above the opening 496. The needle chamber 10 is a hollow cylindrical metal box 101, and a rotating shaft 103 is provided along the central axis of the cylinder. Multiple partitions are provided radially from the rotating shaft 103 to the inner wall of the cylinder. A compartment for accommodating a puncture needle 2 is provided between adjacent partitions. The side wall of the needle chamber 10 above the opening 496 is provided with an outlet 102 that communicates with a compartment and allows a puncture needle 2 to fall from the compartment into the opening 496.The baffle-like protrusion is marked with numbers; the length of the tissue groove 31 is greater than or equal to 3cm; the outer surface of the needle core 3 is provided with an elastic barb structure 12; the lumen sidewall of the puncture needle 2 is provided with a protrusion 13 corresponding to the barb structure 12 for fixing the relative position of the puncture needle 2 and the needle core 3.

[0047] Example

[0048] The prostate biopsy gun provided by this invention can adjust the puncture depth of the puncture needle within a certain range, and can avoid tumor implantation in the needle tract, simplifying redundant actions during the puncture process.

[0049] For the sake of simplicity, the term "adjustable puncture depth repeating crossbow-type prostate puncture gun" is sometimes abbreviated as "prostate puncture gun," "puncture gun," or "this invention." These terms have the same meaning and can be used interchangeably. The ejection device is sometimes abbreviated as "firing spring." These terms have the same meaning and can be used interchangeably. The safety device is sometimes abbreviated as "locking device." These terms have the same meaning and can be used interchangeably.

[0050] In this document, the terms "front" or "apex" refer to the end facing the tip of the puncture needle. Similarly, the terms "posterior," "end," "upper," and "lower" do not constitute absolute spatial restrictions, but rather concepts of relative position. This is something that those skilled in the art will understand.

[0051] The present invention provides a prostate puncture gun, which includes: a skin-piercing needle 1, a support plate 4, a firing spring 5, a puncture needle 2 and a needle core 3, a limiter 6, a gun-retracting bolt 7, a firing device 8, a safety device 9 and a needle chamber 10.

[0052] The puncture needle 1 is 10cm long and 0.9mm in inner diameter, made of stainless steel, and is integrated with the support plate 4 by a screw fixation method. The support plate 4 is 18cm long and 3cm wide, with two firing springs 5 ​​parallel to its long axis. Limiters 6 are located on both sides of the front of the support plate 4 to control the distance the firing springs 5 ​​are ejected. The puncture needle 2 is a hollow stainless steel material with a length of 13.5cm and an outer diameter of 0.9mm, containing a needle core 3. The needle core 3 is 16.5cm long, and its outer diameter fits tightly with the inner diameter of the puncture needle 2. The front end is needle-point shaped, and a 3cm long tissue groove 31 is located near the front end. The rear end of the puncture needle 2 has a 5mm puncture needle baffle-like protrusion 21 that protrudes to the right. The rear end of the needle core 3 has a 5mm needle core baffle-like protrusion 32 that protrudes to the left. After the puncture needle 1 penetrates the subcutaneous tissue and reaches the subcapsular region of the prostate, the front end of the puncture needle 2 and the needle core 3, which are integrated as a whole, are placed inside the puncture needle 1. The rear ends of these components correspond to the two firing springs 5 ​​on the support plate 4. The two firing springs 5 ​​control the ejection of the puncture needle 2 and the needle core 3 by striking the baffle-like protrusions at the rear ends of the two components. There are two firing springs 5; the spring force of the left spring 51 must be greater than that of the right spring 52 to ensure that the needle core 3 ejects first. A sliding bolt is provided on the side or below the firing spring; sliding it backward pulls the front end of the spring backward, compressing the spring. The plate 4 is equipped with a firing device 8 near the middle of the firing spring 5. This device can hold the front end of the compressed firing spring 5 in place. When the safety device 9 is opened, which is the locking device, the firing trigger 86 is pulled. The firing spring 5 is ejected forward, and the needle core 3 is ejected first to pierce the gland. Due to its elasticity, part of the gland is stuck in the tissue groove 31 in front of the needle core 3. Then the puncture needle 2 is ejected and uses shearing force to cut the prostate gland into tissue strips that are stuck in the tissue groove 31, thus completing the puncture. After the puncture is completed, first pull the sliding bolt of the firing spring 5 backward, pulling the firing spring 5 backward and compressing the firing spring 5 until the front end of the firing spring 5 is locked by the barbed protrusion 84 of the firing device 8; the bolt 7 retracts the puncture needle 2 and the needle core 3 backward. When the tip of the puncture needle and the needle core moves from the bottom closed end 491 of the groove 49 of the chamber 45 to the opening 492, the rear end baffle-like protrusion of the puncture needle and the needle core moves to the through hole 493; the puncture needle can automatically disengage from the base plate 46 from the opening 492 and the through hole 493. Then rotate the rotation knob 106 of the needle chamber 10 to release the new puncture needle 2 and the needle core 3, and prepare to start the next puncture.

[0053] like Figure 1 As shown, the prostate biopsy gun provided by this invention mainly includes:

[0054] Piercing needle 1: as Figures 1 to 3 As shown, the piercing needle 1 of the present invention is a detachable needle. The piercing needle 1 is 10cm long, has an inner diameter of 0.9mm, and is made of stainless steel. The rear end is funnel-shaped to facilitate the insertion of the puncture needle 2, and is threaded.

[0055] Puncture needle 2: such as Figure 4 As shown in Figure 6, the puncture needle 2 is made of hollow stainless steel with a length of 13.5 cm and an outer diameter of 0.9 mm. The rear end of the puncture needle 2 has a 5 mm puncture needle baffle-like protrusion 21 that protrudes to the right. It contains a needle core 3.

[0056] Needle core 3: such as Figure 5 As shown in Figure 6, the needle core 3 is 16.5 cm long, with its outer diameter closely matching the inner diameter of the puncture needle 2. The front end is needle-tipped and made of solid stainless steel. A tissue groove 31, 3 cm long, is provided at the front end. The rear end of the needle core 3 has a 5 mm needle core baffle-like protrusion 32 protruding to the left, and numbers from 1 to 12 can be marked on the baffle. The outer surface of the needle core 3 is provided with an elastic barbed structure 12. The lumen sidewall of the puncture needle 2 has a protrusion 13 corresponding to the barbed structure 12, used to lock the barbed structure 12 and fix the relative position of the puncture needle 2 and the needle core 3. In the initial state before puncture, the needle core 3 is inserted into the puncture needle 2. The needle core baffle-like protrusion 32 at the rear end of the needle core 3 is close to the puncture needle baffle-like protrusion 21 at the rear end of the puncture needle 2. One end of the needle tip of the needle core 3 protrudes out of the outside of the needle tip of the puncture needle 2. The barb structure 12 is pressed by the tube wall of the puncture needle 2 and is located between the puncture needle protrusion 13 and the needle tip of the puncture needle 2. At this time, the distance between the barb structure 12 and the protrusion 13 is equal to the distance between the needle tip of the needle core 3 and the needle tip of the puncture needle 2.

[0057] Once the puncture begins, firstly, the needle core 3 is ejected into the prostate gland, and then the puncture needle is ejected into the prostate gland. The wall of the puncture needle 2 moves along the needle body of the needle core 3 towards the needle tip. When the barbed structure 12 enters the protrusion 13, the wall of the puncture needle 2 no longer presses against the barbed structure 12, and the barbed structure 12 springs up and presses against the protrusion 13. At this time, the needle tip of the puncture needle 2 also reaches the needle tip of the needle core 3, and the two needle tips are aligned. By using the barbed structure 12 to hold the protrusion 13, the needle core 3 and the puncture needle 2 form a whole. The ejector bolt 7 only needs to pull the needle core 3 to move the puncture needle 2 together towards the rear baffle 42, thus detaching the puncture needle 2 from the piercing needle 1.

[0058] tray 4: such as Figure 1 As shown in Figures 7, 13, 14, 15, and 16, the support plate 4 is 18 cm long, 3-4 cm wide, and 5 mm thick, and can be made of metal. It has a front baffle 41 and a rear baffle 42, each 1 cm high, positioned at the front and rear. Between the front baffle 41 and the rear baffle 42 are two parallel cylindrical guide posts with a diameter of 3 mm, designated as the left guide post 43 and the right guide post 44. A groove 49 is formed in the middle of the support plate 4, serving as the gun chamber 45. The groove 49 extends through the front and rear of the support plate 4, and a transverse through-hole 493 is located slightly behind the groove 49. A spiral hole, or through-hole 47, is formed in the middle of the front baffle 41 for installing the piercing needle 1. The front side of the support plate 4 is marked with a scale 48.

[0059] Firing spring 5: as Figure 1 As shown in Figures 13 and 14, two firing springs 5 ​​are wound around the outer periphery of two guide posts, left guide post 43 and right guide post 44. The rear end of the firing spring 5 is fixed to the rear baffle 42, and the front end is a free end. The spring force of the left spring 51 is greater than that of the right spring 52. The spring force of the left spring 51 is integrated with the left spring head 53. The spring force of the right spring 52 is integrated with the right spring head 54. The left spring head 53 and the right spring head 54 are square metal with a side length of 5mm and a 3mm diameter circular hole in the middle through which the left guide post 43 and the right guide post 44 pass. The left spring head 53 and the right spring head 54 are provided with sliding bolts facing the outer side of the support plate, which pull the left spring head 53 and the right spring head 54 towards the rear baffle 42.

[0060] Limiter 6: such as Figure 1 As shown in 8, 13, and 14, the limiter 6 is made of metal and consists of two rectangular metal strips located on both sides of the tray 4. It has two positions, one in front and one in back, with a fixed distance of 3-3.5cm. The two positions are connected by a metal plate in the middle and are stuck on the side of the tray 4, protruding inward. It can be driven by a motor or manually slid back and forth along the tray 4 and fixed. The movement distance can be determined according to the markings on scale 48.

[0061] Bolt retraction 7: as Figure 15 As shown in Figures 16 and 17, a bolt 7 for retracting the gun is mounted on the base plate 46. A groove 494 parallel to the groove 49 is provided between the end of the base plate 46 near the piercing needle 1 and the through hole 493 for moving the bolt 7 back and forth. The two ends of the bolt 7 protrude from both sides of the base plate 46. The bolt 7 includes a push rod 71 and a push block 72. The push rod 71 is mounted in the groove 494. One end of the push rod 71 protrudes from the bore surface of the base plate 46 and is located below the position of the limiter 6. The other end of the push rod 71 is connected to the push block 72 located on the other side of the base plate 46. Manually pushing the push block 72 causes the push rod 71 to move along the slide groove 494. The push rod 71 abuts against the needle core baffle protrusion 32, pushing the needle core 3 and simultaneously pulling the puncture needle 2, which is fixed together with the needle core 3, towards the rear baffle 42, thereby causing the puncture needle to exit the piercing needle 1. When the front tip of the puncture needle 2 and the needle core 3 moves from the bottom closed end 491 of the groove 49 to the opening 492, the rear baffle protrusion of the puncture needle 2 and the needle core 3 just moves to the through hole 493. The puncture needle 2, together with the needle core 3, can automatically detach from the opening 492 and the through hole 493 and leave the base plate 46. The cross-section of the ejector bolt 7 is made of I-shaped metal material.

[0062] Firing device 8: such as Figure 1 , Figure 9 , Figure 13 , Figure 14As shown, the firing device 8 includes a left spring limiting plate 81 and a right spring limiting plate 82 on both sides of the central axis of the base plate, connected by a metal connecting shaft 83. The metal connecting shaft 83 passes through the side wall of the support plate 4, so that the left spring limiting plate 81 and the right spring limiting plate 82 are located on both sides of the support plate 4 and can be linked. A one-way barbed protrusion 84 is provided in front of the two spring limiting plates. A torsion spring 85 can be wound around the metal connecting shaft 83, so that the front of the spring limiting plate maintains a downward pressing tendency. The left spring limiting plate 81 is longer than the right spring limiting plate 82, and the distance from the rear end to the connecting shaft 83 is longer than the distance from the front end to the connecting shaft 83 to maintain torque. The part of the left spring limiting plate 81 that extends beyond the connecting shaft 83 is slightly curved forward, serving as the firing trigger 86. In its natural state, the spring limiting plate is downward and locks the spring head of the firing spring 5 through the barbed protrusion 84.

[0063] Safety device (locking device) 9: such as Figure 1 As shown, a rectangular metal connecting plate 91 is installed 2-3 cm in front of the left spring limiting plate 81. A hinged, movable metal safety block 92 is vertically installed in the middle of the metal connecting plate 91. The length of the safety block 92 is equal to the distance from the middle of the connecting plate 91 to the trigger 86 in its natural state. This device can prevent accidental firing of the firing mechanism and can also serve as a point of force when the firing mechanism is pressed, ensuring the stability of the piercing gun itself when the firing mechanism is pressed.

[0064] Needle compartment 10: such as Figure 1 , Figure 10 , Figure 11 , Figure 12 As shown, for robot operation, a movable needle compartment 10 can be installed above the tray 4. The outer shell of the needle compartment 10 is a cylindrical metal box 101, the length of which is equal to the length of the puncture needle and the needle core. A removal outlet 102 is provided at the bottom of the metal box 101, the width and length of which fit the puncture needle and the needle core. A cylindrical inner core rotating shaft 103 is installed inside the metal box 101. Twelve partitions are arranged radially on the inner wall of the cylinder from the rotating shaft 103. Adjacent partitions form slots 104 for placing a set of puncture needles and needle cores. The cylindrical rotating shaft 103 is connected to the metal box 101 in a concentric circle manner by rivets 105. A rotating knob 106 is provided on the top opposite to the rivet 105.

[0065] Loading device 11: such as Figure 15 , Figure 17 , Figure 21As shown; the loading device 11 includes a push rod 2 111 and a push block 2 112; the bottom of the groove 49 away from the end of the puncture needle 1 is provided with a sliding groove 2 495 that passes through the base plate 46, the sliding groove 2 495 is connected to the bottom opening 1 492 of the groove 49, and the sliding groove 2 495 and the bottom opening 1 492 of the groove 49 are provided with a push rod 2 111 that moves back and forth to push the puncture needle 2 into the lumen of the puncture needle 1; the push rod 2 111 is connected to the push block 2 112 located on the other side of the base plate 46. After the first puncture needle and needle core detach from the base plate 46, rotate the rotary knob 106, and the next puncture needle and needle core will fall from the needle chamber 10 into the groove 49. At this time, the needle tip and the part near the needle tip of the puncture needle 2 and needle core 3 fall on the bottom closed end 491 of the groove 49, while the rear end baffle-like protrusions of the puncture needle 2 and needle core 3 are set on both sides of the second opening 496 of the groove 49, thus supporting the puncture needle 2 and needle core 3. By manually moving the push block 112 of the loading device 11 forward, the push rod 111 of the loading device 11 enters the bottom opening 492 of the groove 49 from the second groove 495. Continue to push the push block 112 forward towards the baffle, and push the puncture needle 2 and needle core 3 into the lumen of the piercing needle 1 through the push rod 111.

[0066] Method of using this invention:

[0067] When using the puncture gun of the present invention, 12 puncture needles 2 are prepared in advance. The needle core 3 is inserted into the puncture needle 2. The needle core baffle-like protrusion 32 at the rear end of the needle core 3 is close to the puncture needle baffle-like protrusion 21 at the rear end of the puncture needle 2. One end of the needle tip of the needle core 3 protrudes out of the outside of the needle tip of the puncture needle 2. The barb structure 12 on the needle core 3 is pressed by the tube wall of the puncture needle 2. The barb structure 12 is located between the puncture needle protrusion 13 and the needle tip of the puncture needle 2. The puncture needle baffle-like protrusion 21 and the needle core baffle-like protrusion 32 are marked with numbers and placed in the slot 104 of the needle chamber 10 in order of the numbers for later use. Pull the sliding bolt of the left spring head 53 and the right spring head 54 toward the outside of the support plate so that the left and right spring heads are engaged in the one-way barb-shaped protrusion 84 of the firing device 8.

[0068] Then as Figure 1 As shown, the composite of the puncture needle 2 and the needle core 3 is placed on the tray 4 by manual release or release from the needle chamber 10.

[0069] like Figure 10 , Figure 11 As shown, in a robotic puncture scenario, 12 puncture needles 2 and needle cores 3 are installed in the compartments formed by the 12 slots 104 of the needle chamber 10. The needle chamber 10 is suspended above the tray 4. The removal outlet 102 below the needle chamber 10 is opened, and the rotation knob 106 on the needle chamber 10 is turned. The compartments formed by the slots 104 are aligned with the removal outlet 102, releasing the puncture needles 2 and needle cores 3, which fall onto the tray 4 through the opening 496 above the groove 49.

[0070] At this point, the tips of the puncture needle 2 and the needle core 3, as well as the portion near the tips, rest on the bottom closed end 491 of the groove 49. The rear end baffle-like protrusions of the puncture needle 2 and the needle core 3 are positioned on both sides of the second opening 496 of the groove 49, thus completely supporting the puncture needle 2 and the needle core 3. By manually moving the push block 112 of the loading device 11 forward, the push rod 111 of the loading device 11 enters the bottom opening 492 of the groove 49 from the second slide groove 495. The push block 112 continues to be pushed towards the front baffle 41, and the push rod 111 pushes the puncture needle 2 and the needle core 3 forward into the lumen of the piercing needle 1 until the front of the needle core 3 is inserted 6 cm into the piercing needle 1. At this point, the rear ends of the needle core 3 and the puncture needle 2 correspond to the left spring head 53 and the right spring head 54, respectively. The loading device 11 returns to its starting position at the second slide groove 495 along the original path.

[0071] After positioning, the puncture needle 1 pierces the prostate capsule through the skin and subcutaneous tissue. The safety block 92 on the safety device 9 is pried open to the side. The connecting plate 91 on the safety device 9 and the firing trigger 86 of the firing device 8 are pinched. The barbed protrusion 84 in front of the firing device 8 is raised, releasing the left spring head 53 and the right spring head 54 at the same time. Then the firing trigger 86 is released, and the barbed protrusion 84 returns to its natural downward pressing state due to the action of the torsion spring 85.

[0072] Because the left spring 51 has a greater elastic force, the left spring head 53 pushes the needle core baffle-like protrusion 32 on the left side of the needle core 3 until it reaches the front stop 61 of the limiter 6, thus ejecting the needle core 3 to the designated position. The right spring 52 has a slightly weaker elastic force. After the needle core 3 reaches the designated position, the right spring head 54 pushes the right puncture needle baffle-like protrusion 21 on the right side of the puncture needle 2 until it reaches the rear stop 62 of the limiter 6, thus ejecting the puncture needle 2 to the designated position. Figure 14 This is the puncture gun state after the ejection device is fired. After the needle core 3 reaches the designated position first, the prostate tissue is placed into the tissue groove 31 of the needle core 3. Then, the puncture needle 2 reaches the designated position, cuts off the tissue in the tissue groove 31, and is stuck into the tissue groove 31. Figure 14 This is the piercing gun's state after the ejection device is fired.

[0073] After the puncture begins, the needle core 3 is ejected into the prostate gland, followed by the ejection of the puncture needle 2. The wall of the puncture needle 2 moves along the needle body of the needle core 3 towards the needle tip. When the barbed structure 12 on the needle body of the needle core 3 enters the protrusion 13 on the wall of the puncture needle 2, the wall of the puncture needle 2 no longer presses against the barbed structure 12, and the barbed structure 12 naturally springs up and presses against the protrusion 13. At this time, the needle tip of the puncture needle 2 also reaches the needle tip of the needle core 3, and the two needle tips are aligned. At this time, the barbed structure 12 locks the protrusion 13, and the needle core 3 and the puncture needle 2 form a whole. Pulling the ejector bolt 7 allows the needle core 3 to drive the puncture needle 2 to move together towards the rear baffle 42, thus detaching the puncture needle 2 from the piercing needle 1.

[0074] First, pull the sliding bolts of the left spring head 53 and the right spring head 54 toward the outside of the support plate, so that the left and right spring heads are re-engaged into the one-way barbed protrusions 84 of the firing device 8.

[0075] Pull the bolt 7 to retract the gun. The bolt 7 includes a push rod 71 and a push block 72. The push rod 71 passes through the slide groove 494. One end of the push rod 71 protrudes from the bore surface of the base plate 46 and is located below the front stop 61 of the limiter 6. The other end of the push rod 71 is connected to the push block 72 located on the other side of the base plate 46. Manually pushing the push block 72 causes the push rod 71 to move along the slide groove 494. The push rod 71 abuts against the needle core baffle protrusion 32, pushing the needle core 3 and simultaneously moving the puncture needle 2 towards the rear baffle 42, thereby causing the puncture needle to exit the puncture needle 1. When the front tip of the puncture needle 2 and the needle core 3 moves from the bottom closed end 491 of the groove 49 to the opening 492, the rear baffle protrusion of the puncture needle 2 and the needle core 3 just moves to the through hole 493. The puncture needle 2 and the needle core 3 automatically fall out from the opening 492 and the through hole 493, leaving the base plate 46.

[0076] like Figure 13 As shown, the bolt 7 is returned to its original position and moved to the front of the support plate 4; the two spring heads are engaged with the barbed protrusions 84 of the firing device 8, and the needle chamber 10 releases the piercing needle 2 and the needle core 3 to the support plate 4, ready for the next piercing. This enables repeating crossbow firing. Figure 13 This is the state before the firing mechanism fires.

[0077] After each puncture, the puncture needle 2 and the needle core 3 are immersed in the fixative solution. After the puncture is completed, the tissue in the tissue groove 31 is collected in a unified manner, and the puncture site is identified according to the number on the back of the needle core 3.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An adjustable depth of penetration multi-shot prostate biopsy gun, characterized in that, The breechblock includes a piercing needle, a detachable puncture needle, a needle core, a limiter, a chamber, a backplate, a bolt-action mechanism, a loading device, a firing mechanism, a safety device, and a needle magazine. One end of the backplate has a hollow piercing needle with openings at both ends, and a cavity for accommodating the puncture needle is located between the two ends of the piercing needle openings. A needle core is inserted into the cavity of the hollow puncture needle. A chamber for accommodating the puncture needle is located on one side of the backplate corresponding to the cavity of the piercing needle. A bolt-action mechanism and a loading device are located on the other side of the backplate. The puncture needle and needle core each have a baffle-like protrusion at their ends furthest from the needle tip. The baffle-like protrusions of the needle core and the needle tip are respectively provided on both sides of the piercing needle body; the support plate corresponding to the baffle-like protrusions is provided with a firing device for firing the puncture needle and the needle core; the support plate is provided with a safety device for limiting the activation of the firing device; the end of the support plate near the piercing needle is provided with a movable limiter for limiting the position of the puncture needle and the needle core and for adjusting the puncture depth; the support plate is also provided with a removal device for removing the puncture needle and a needle chamber for storing and releasing the puncture needles one by one; the end of the needle core near the needle tip is provided with a tissue groove along the length direction of the needle core body, and the length of the puncture needle is less than the length of the needle core. The limiter includes two positions that define the positions of the puncture needle and the needle core, respectively. The distance between the two positions is equal to the difference in length between the puncture needle and the needle core. The side of the support plate is provided with a scale for displaying the position.

2. The multi-shot prostate biopsy gun with adjustable penetration depth according to claim 1, wherein, The support plate includes a front baffle, a rear baffle, and a bottom plate; the bottom plate has a vertically parallel front baffle and a rear baffle; the front baffle has a through hole, and a hollow piercing needle is provided in the through hole along the central axis of the bottom plate towards the outside of the support plate; the bottom plate surface on the same side as the piercing needle has a barrel along the central axis of the bottom plate for placing the piercing needle.

3. The multi-shot prostate biopsy gun with adjustable penetration depth according to claim 2, wherein, Two guide posts parallel to the central axis of the base plate are respectively provided on both sides of the front baffle and the rear baffle. A firing spring is sleeved on the guide post. The end of the firing spring away from the puncture needle is fixed, and the other end is provided with a spring head for striking the puncture needle and the baffle-like protrusion of the needle core. The baffle-like protrusions of the puncture needle and the needle core are respectively provided on both sides of the central axis of the base plate.

4. The multi-shot prostate biopsy gun with adjustable penetration depth according to claim 3, wherein, The firing device includes two spring limiting plates respectively arranged on both sides of the central axis of the base plate, and a connecting shaft is provided between the two spring limiting plates. A torsion spring is sleeved on the connecting shaft. The connecting shaft is perpendicular to the central axis of the base plate. The ends of the two spring limiting plates near the puncture needle are provided with barbed protrusions for limiting the position of the spring head and releasing the spring head after it is removed. The length of the end of one of the two spring limiting plates away from the puncture needle is greater than the length of the end of the other spring limiting plate away from the puncture needle. The end of the longer spring limiting plate away from the puncture needle is set as the firing trigger.

5. The multi-shot prostate biopsy gun of claim 4, wherein, The safety device includes a safety block that abuts against the firing trigger and a connecting plate that is movably connected to the safety block, the connecting plate being fixed to the support plate.

6. The multi-shot prostate biopsy gun with adjustable penetration depth of claim 2, wherein, The barrel is a groove arranged on one side of the bottom plate for accommodating the needle body of the puncture needle; the groove is arranged on the central axis of the bottom plate, and the groove is closed at one end near the skin-breaking needle and is provided with an opening one on the bottom adjacent to the closed end for the needle body of the puncture needle to pass through the bottom plate; the other end of the groove is provided with two through holes two on both sides for the puncture needle and the needle core to pass through the bottom plate, and the through holes two are communicated with the opening one of the groove.

7. The multi-shot prostate biopsy gun of claim 6, wherein, The bottom plate is provided with a gun bolt, and the bottom plate is provided with a sliding groove one parallel to the groove between the other end of the bottom plate and the through hole two for the front and back movement of the gun bolt; the both ends of the gun bolt protrude from the two sides of the bottom plate; the gun bolt comprises a push rod one and a push block one; the push rod one is arranged in the sliding groove one, and one end of the push rod one protrudes from the barrel side of the bottom plate and is arranged below the stop position of the stopper; the other end of the push rod one is connected with the push block one arranged on the other side of the bottom plate.

8. The multi-shot prostate biopsy gun of claim 7, wherein, The chamber loading device comprises a push rod two and a push block two; the bottom of the groove away from the skin-breaking needle is provided with a sliding groove two passing through the bottom plate, the sliding groove two is communicated with the bottom opening one of the groove, and the sliding groove two and the bottom opening one of the groove are provided with a push rod two moving forward and backward for pushing the puncture needle into the lumen of the skin-breaking needle; the push rod two is connected with the push block two arranged on the other side of the bottom plate.

9. The multi-shot prostate biopsy gun of claim 8, wherein, The upper end of the groove is provided with an opening two, and the needle magazine is arranged above the opening two; the needle magazine is arranged as a hollow cylindrical shape, and is provided with a rotating shaft along the central axis of the cylinder; a plurality of partitions are arranged on the inner wall of the cylinder in the radial direction from the rotating shaft; the adjacent partitions are arranged as a partition compartment accommodating one puncture needle, and the side wall of the needle magazine above the opening two is provided with a moving outlet communicated with one partition compartment for one puncture needle falling from the partition compartment into the opening two.

10. The multi-shot prostate biopsy gun of claim 1, wherein, The baffle-like protrusion is provided with a digital mark; the length of the tissue groove is greater than or equal to 3cm; the outer surface of the needle body of the needle core is provided with an elastic barb structure, and the lumen side wall of the puncture needle is provided with a protrusion corresponding to the barb structure for fixing the relative position of the puncture needle and the needle core.

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