Transperineal universal prostate biopsy holder

Abstract

The application discloses a transperineal universal puncture frame for prostate cancer, which comprises a puncture needle positioning assembly installed on a rectal ultrasonic probe through a base, wherein the puncture needle positioning assembly comprises a horizontal track arc and a moving arc which is vertically arranged and slidably assembled on the track arc, and a puncture needle positioning mechanism for positioning a puncture needle is slidably arranged on the moving arc; the moving arc and the track arc have the same center, and the center is located directly above the front end of the rectal ultrasonic probe; and the puncture needle positioning mechanism is arranged on the diameter of the moving arc. The application has the advantages of simple structure and convenient adjustment, and is used for assisting the puncture needle to perform puncture operation, so that the number of needle insertion ports is reduced, the anesthesia area, the bleeding and the infection risk are further reduced, the puncture efficiency is improved, and the occurrence of complications is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an auxiliary device for prostate puncture treatment. Background Art

[0002] In recent years, the incidence and mortality rates of prostate cancer in my country have been on the rise. In most areas, the proportion of newly diagnosed patients in the middle and late stages has increased significantly, which has a direct impact on the treatment effect and long-term survival of prostate cancer patients. Therefore, early detection, early diagnosis, and early treatment are extremely important for the patient's recovery.

[0003] Currently, prostate biopsy is the definitive standard and best method for diagnosing prostate cancer. Clinically, prostate biopsy is generally performed through two routes: transperineal and transrectal. Regardless of the method, the needle must be inserted with the aid of a rectal ultrasound probe. Because bleeding and infection are inevitable during the puncture process, the goal of biopsy is to minimize the risk of trauma and infection while ensuring accuracy, speed, and convenience. Transperineal biopsy, bypassing the intestinal route, offers greater safety, facilitates early detection of tumors, and mitigates postoperative adverse reactions. Consequently, it is increasingly being adopted by a growing number of medical institutions.

[0004] During a transperineal prostate biopsy, a puncture template is often used to assist the puncture needle. The template is typically pushed between the patient's legs to the perineum, where the needle passes through the template and enters the prostate gland to obtain a sample. Currently, two types of puncture templates are commonly used in clinical practice: a clip-type structure and a plate-type structure. Both of these templates require the needle to be inserted parallel to the probe. Because the needle tract structure on the template cannot be avoided, the anesthesia area is very large and the needle entry points are numerous, which increases damage to surrounding organs and complications.

[0005] Chinese patent CN201520748911.2 discloses a puncture template for transperineal prostate biopsy, comprising a front template with a plurality of first positioning holes for the puncture needle to pass through; a rear template with a plurality of second positioning holes for the puncture needle to pass through; and a ball-joint assembly, wherein at least three ball-joint assemblies are arranged in a triangular pattern between the front and rear templates. The ball-joint assembly includes two ball hinges and a connecting rod fixedly connecting the two ball hinges. The two ball hinges are respectively connected to the front and rear templates to enable rotation relative to the connecting rods. This puncture template can adjust the relative position of the front and rear templates via the ball-joint assemblies, thereby achieving multi-angle puncture and improving the operational flexibility during the biopsy procedure. However, due to the large size of the template, it is relatively inconvenient to use, and the adjustment of the ball-joint assembly is also relatively complex, making it difficult to accurately and quickly adjust the needle path to the desired state. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a universal puncture stand for prostate cancer transperineal puncture with a simple structure and convenient adjustment, which is used to assist the puncture needle in puncture operations, reduce the number of needle entry ports, further reduce the anesthesia area, bleeding and infection risks, improve puncture efficiency, and reduce the occurrence of complications.

[0007] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0008] A universal transperineal puncture stand for prostate cancer includes a puncture needle positioning assembly mounted on a rectal ultrasound probe via a base. The puncture needle positioning assembly includes a horizontally arranged track arc and a vertically arranged movable arc slidably assembled on the track arc. A puncture needle positioning mechanism for positioning the puncture needle is slidably arranged on the movable arc. The movable arc and the track arc are concentric, with the center of the circle located directly above the front end of the rectal ultrasound probe. The puncture needle positioning mechanism is arranged on the diameter of the movable arc.

[0009] The base of the above-mentioned universal transperineal puncture frame for prostate cancer is clamped on the rectal ultrasound probe and fixed by a locking mechanism.

[0010] In the above-mentioned universal puncture frame for prostate cancer through perineum, the track arc is arranged above the base through a fixing seat, and a lifting adjustment mechanism for adjusting the upper and lower heights of the track arc, the moving arc thereon, and the puncture needle positioning mechanism is arranged in the fixing seat.

[0011] The above-mentioned universal transperineal puncture frame for prostate cancer, the lifting and adjusting mechanism includes a rotating shaft that passes through the side wall of the fixing seat and is installed in the inner cavity of the fixing seat, and an adjustment disk is provided at one end of the rotating shaft extending out of the fixing seat; an adjustment gear is fixedly provided on the rotating shaft located in the inner cavity of the fixing seat, and a groove is vertically provided on the inner wall of the fixing seat, and a rack is slidably fitted in the groove, which engages with the adjustment gear and can slide up and down along the groove; the track arc is fixedly installed at the top end of the rack extending out of the fixing seat.

[0012] The above-mentioned universal puncture frame for prostate cancer through perineum is further provided with a lifting mechanism positioning component for fixing the lifting adjustment mechanism on the fixing seat.

[0013] The above-mentioned prostate cancer transperineal universal puncture frame, the lifting mechanism positioning assembly includes a fan-shaped block set in the inner cavity of the fixed seat through a pin shaft, a double-cone push block is fixedly set on the rotating shaft above the fan-shaped block, a positioning gear is fixedly set on the rotating shaft on one side of the double-cone push block, and a straight tooth meshing with the positioning gear is horizontally set at the top edge of the double-cone push block located below the positioning gear; the rotating shaft is hollow and penetrates the optical axis in the inner cavity of the fixed seat, and the optical axis and the rotating shaft are slidably matched.

[0014] The above-mentioned universal transperineal puncture frame for prostate cancer, the lifting mechanism positioning assembly includes a positioning rod parallel to the rotating shaft and fixedly arranged on the outer wall of the fixed seat, and the adjustment disk is provided with a plurality of positioning holes corresponding to the position of the positioning rod and capable of passing through the positioning rod, and all the positioning holes are arranged in a ring on the edge of the adjustment disk.

[0015] The above-mentioned universal transperineal puncture frame for prostate cancer, the track arc is composed of two parallel curved tracks, the bottom ends of the two curved track parts located above the lifting and adjustment mechanism are connected into an integrated structure by a fixed plate; C-shaped grooves are opened on the opposite surfaces of the two curved tracks, and sliders are slidably mounted in the C-shaped grooves. The two sliders are fixedly connected by a horizontal connecting plate, and the horizontal connecting plate is fixedly set at the bottom end of the moving arc.

[0016] The above-mentioned universal puncture frame for prostate cancer transperineal puncture has a movable arc fixing frame fixedly provided at the lower part of the movable arc and straddling the track arc. The side wall of the movable arc fixing frame is transversely threaded with a third fixing bolt that tightens the movable arc fixing frame against the side wall of the track arc.

[0017] The above-mentioned prostate cancer transperineal universal puncture frame, the puncture needle positioning mechanism is slidably set on the movable arc through the puncture needle positioning mechanism fixing frame, and the puncture needle positioning mechanism fixing frame and the movable arc are positioned by a second fixing bolt connected by a transverse thread; the puncture needle positioning mechanism includes a sleeve fixedly set in the middle of the puncture needle positioning mechanism fixing frame and located in the arc-shaped groove of the movable arc, and positioning needle rings located at both ends of the sleeve, and the sleeve and the two positioning needle rings are coaxial; a slender through hole is opened on the wall of the sleeve, and sleeves are provided on the end surfaces of the sleeve at both ends of the slender through hole, and the two positioning needle rings are connected by a connecting rod passed through the sleeve and the slender through hole, and the connecting rod and the sleeve are positioned by a first fixing bolt threadedly connected to the sleeve.

[0018] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is as follows.

[0019] The present invention has a simple structure and is easy to adjust. Since the moving arc and the orbital arc have the same center and the center is located directly above the probe, by adjusting the position of the moving arc on the orbital arc, it can be ensured that the puncture needle can penetrate the target lesion area regardless of the angle from which the needle is inserted, thereby improving the puncture efficiency; and the present invention can insert the needle at the same needle entry point on the perineum, greatly reducing the number of needle entry points on the perineum, thereby reducing the anesthesia area and the risk of bleeding and infection, further reducing damage to surrounding organs, and reducing the occurrence of complications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of Example 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the puncture needle positioning mechanism and the movable arc installation structure in embodiment 1 of the present invention;

[0022] Figure 3 This is a structural diagram of the lifting adjustment mechanism and the lifting mechanism positioning assembly in embodiment 1 of the present invention;

[0023] Figure 4 This is a schematic diagram of the mechanism of the positioning assembly of the lifting mechanism in Example 2 of the present invention;

[0024] Figure 5 This is a schematic structural diagram of a plurality of positioning rods provided in a positioning assembly of a lifting mechanism in Example 2 of the present invention;

[0025] Figure 6 This is a schematic structural diagram of Example 3 of the present invention;

[0026] Figure 7 Schematic diagram of the installation structure between the lifting adjustment mechanism, the track arc and the moving arc in Example 3 of the present invention;

[0027] Figure 8This is a structural diagram of another angle of embodiment 3 of the present invention.

[0028] Wherein: 1. Rectal ultrasound probe, 2. Base, 3. Fixed seat, 31. Rotating shaft, 32. Adjusting disk, 321. Positioning hole, 33. Adjusting gear, 34. Rack, 341. Guide slider, 35. Sector block, 36. Straight teeth, 37. Positioning gear, 38. Double-cone push block, 39. Positioning rod, 4. Track arc, 41. C-shaped groove, 5. Moving arc, 51. Horizontal connecting plate, 52. Slider, 6. Puncture needle positioning mechanism, 61. Sleeve, 62. Cannula, 63. Connecting rod, 64. First fixing bolt, 65. Positioning needle ring, 7. Puncture needle positioning mechanism fixing frame, 71. Second fixing bolt, 8. Moving arc fixing frame, 81. Third fixing bolt. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] A universal puncture frame for prostate cancer through the perineum, the structure of which is as follows Figures 1 to 3 As shown, it includes a base 2 and a puncture needle positioning assembly. The puncture needle positioning assembly is installed on the rectal ultrasound probe 1 through the base 2. When performing a puncture operation, the puncture needle is guided by the rectal ultrasound probe 1 to pass through the puncture needle positioning assembly through the patient's perineum into the prostate gland to obtain a sample.

[0032] The puncture needle positioning assembly includes a track arc 4, a moving arc 5 and a puncture needle positioning mechanism 6. The track arc 4 is horizontally arranged on the base, the moving arc 5 is slidably assembled on the track arc 4 and is vertically arranged, and the puncture needle positioning mechanism 6 is slidably arranged on the moving arc for positioning the puncture needle.

[0033] The moving arc 5 and the track arc 4 are concentric, and the center of the circle is located directly above the front end of the rectal ultrasound probe. The puncture needle positioning mechanism 6 is arranged on the diameter of the moving arc.

[0034] The moving arc, the track arc and the rectal ultrasound probe constitute a three-dimensional coordinate system, so the positioning needle passing through the puncture needle positioning mechanism 6 can accurately locate the prostate gland lesion after passing through the center of the circle.

[0035] In the present invention, in order to ensure the accuracy of puncture and the convenience of operation, the radian of the moving arc is set to 45-60 degrees, and the radian of the track arc is set to 90 degrees.

[0036] The base 2 is snap-fitted onto the rectal ultrasound probe 1 and secured by a locking mechanism. In this embodiment, the base can be configured as a cylindrical structure with an axial opening, and a positioning plate is provided at the opening. The locking mechanism comprises matching bolts and nuts, and through-holes are provided in the two positioning plates. The bolts pass through the through-holes in the two positioning plates and are then tightened by the nuts, thereby securely attaching the base to the rectal ultrasound probe 1.

[0037] The track arc 4 is arranged above the base 2 through a fixing seat 3. The fixing seat is a square tube structure with a hollow interior. The bottom end of the fixing seat is fixedly connected to the base to form an integrated structure.

[0038] A lifting adjustment mechanism is provided in the fixing seat 3 for adjusting the height position of the track arc 4 and the moving arc thereon and the puncture needle positioning mechanism relative to the rectal ultrasound probe 1 .

[0039] In this embodiment, the structure of the lifting and lowering adjustment mechanism is as follows: Figure 3 As shown, it includes a rotating shaft 31, an adjusting disk 32, an adjusting gear 33, and a rack 34. The rotating shaft 31 passes through the side wall of the fixed base and is installed in the inner cavity of the fixed base 3. The adjusting disk 32 is fixed to the outer end of the rotating shaft extending from the fixed base 3; the adjusting gear 33 is fixedly set on the rotating shaft 31 located in the inner cavity of the fixed base 3. A vertical groove is provided on the inner wall of the fixed base 3, and the rack 34 is slidably fitted in the groove, and the rack 34 meshes with the adjusting gear 33. The track arc 4 is fixedly mounted on the top end of the rack 34 extending from the fixed base 3. When the adjusting gear rotates, the rack can slide up and down along the groove, thereby pushing the track arc up and down.

[0040] The fixed seat 3 is also provided with a lifting mechanism positioning assembly, which is used to fix the lifting adjustment mechanism after the lifting adjustment mechanism adjusts the track arc, the moving arc and the puncture needle positioning mechanism 6 to the position to prevent it from being displaced and affecting the puncture operation.

[0041] In this embodiment, the structure of the lifting mechanism positioning assembly is as follows: Figure 3 As shown, it includes a sector block 35, a double-cone push block 38, and a positioning gear 37. The sector block 35 is a large sector-shaped structure and is set in the inner cavity of the fixed seat 3 via a pin; the double-cone push block 38 is located on the rotating shaft 31 above the sector block 35 and is fixed to the rotating shaft. The middle part of the double-cone push block 38 has a large diameter and is located at the bottom of the V-shaped groove of the large sector structure; the positioning gear 37 is fixed to the rotating shaft on one side of the double-cone push block 38, and the straight teeth 36 are located at the top edge of the double-cone push block 38 below the positioning gear 37. The straight teeth 36 are horizontally arranged and mesh with the positioning gear; the rotating shaft 31 is hollow and passes through the optical axis in the inner cavity of the fixed seat 3. The optical axis is fixed in the fixed seat and is coaxial with the rotating shaft and slidably assembled.

[0042] When the adjusting disk 32 is pushed inward, the double-cone pushing block 38 pushes the right end of the sector block 35, causing the left end to move upward around the pin shaft, and the straight teeth 36 clamp the positioning gear 37, locking the adjusting disk 32 from rotating, thereby achieving positioning; when the adjusting disk 32 is pulled outward, the double-cone pushing block 38 pushes the left end of the sector block 35, causing the left end to rotate and move downward around the pin shaft, and the straight teeth 36 separate from the positioning gear 37. At this time, the track arc, moving arc and height position of the puncture needle positioning mechanism 6 can be adjusted by rotating the adjusting disk.

[0043] A moving arc fixing frame 8 is fixedly provided at the lower part of the moving arc 5 and is connected across the track arc 4. A third fixing bolt 81 is transversely threadedly connected to the side wall of the moving arc fixing frame 8. By adjusting the third fixing bolt 81, the moving arc fixing frame 8 can be tightened to the side wall of the track arc 4 to achieve the positioning of the moving arc and the track arc.

[0044] In this embodiment, the track arc 4 is a single track structure, such as Figure 1 As shown, the inner end surface of the track arc 4 is provided with a C-shaped groove, into which a slider is slidably mounted. The slider is fixedly connected to the bottom end of the moving arc via an L-shaped connecting plate. The moving arc fixing frame 8 is an inverted L-shaped structure, and the vertical end surface of the moving arc fixing frame 8 matches the curvature of the outer end surface of the track arc 4.

[0045] The puncture needle positioning mechanism 6 is slidably arranged on the moving arc 5 through the puncture needle positioning mechanism fixing frame 7. The side wall of the puncture needle positioning mechanism fixing frame 7 is transversely threadedly connected with a second fixing bolt 71, as shown in FIG. Figure 2 As shown, the positioning between the puncture needle positioning mechanism fixing frame 7 and the movable arc 5 can be achieved by adjusting the second fixing bolt 71 , thereby achieving position fixation of the puncture needle positioning mechanism 6 .

[0046] The structure of the puncture needle positioning mechanism 6 is as follows Figure 2 As shown, it includes a sleeve 61 and two positioning needle rings 65. The sleeve 61 is fixedly set in the middle of the puncture needle positioning mechanism fixed frame 7 and is located in the arc-shaped slot of the moving arc 5; the two positioning needle rings 65 are respectively located at both ends of the sleeve 61, and the two positioning needle rings 65 are connected by a connecting rod 63. The sleeve 61 and the two positioning needle rings 65 are coaxial and are used to pass the puncture needle.

[0047] A slender through hole is opened on the wall of the sleeve 61, and the slender through hole conforms to the diameter direction of the moving arc, that is, conforms to the axial direction of the sleeve; sleeves 62 are provided on the end faces of the sleeve at both ends of the slender through hole, and the connecting rod 63 is passed through the sleeve 62 and the slender through hole. The connecting rod 63 and the sleeve 62 are positioned by a first fixing bolt 64 threadedly connected to the sleeve.

[0048] When the depth of the puncture needle needs to be adjusted, it can be achieved by adjusting the position of the connecting rod relative to the sleeve. After the position is adjusted, the first fixing bolt is screwed to position it.

[0049] When the present invention is used, the base is clamped to an appropriate position on the rectal ultrasound probe 1 according to the scanning results of the rectal ultrasound probe 1 and fixed by a locking mechanism; then, the height of the track arc is adjusted and fixed according to the location of the lesion; during the puncture process, the left and right positions of the moving arc on the track arc are adjusted according to the sampling position. When puncture is required below the horizontal plane, the moving arc is rotated along the vertical plane to the bottom of the track arc at the end of the track arc to adjust the vertical position of the moving arc relative to the track arc; the vertical position of the puncture needle positioning mechanism on the moving arc can also be adjusted, and the depth of the puncture needle can also be adjusted by adjusting the position of the connecting rod relative to the sleeve. In this way, sampling operations can be performed on different locations of lesions in the body through the same needle insertion point in the perineum, greatly reducing the patient's trauma surface, and thus reducing the anesthesia area and the risk of bleeding and infection.

[0050] Example 2

[0051] The difference between this embodiment and embodiment 1 is only the structure of the positioning assembly of the lifting mechanism.

[0052] In this embodiment, the structure of the lifting mechanism positioning assembly is as follows: Figures 4 and 5 As shown, it includes a positioning rod 39 arranged parallel to the rotating shaft, and the positioning rod is fixed on the outer wall of the fixing seat; a plurality of positioning holes 321 corresponding to the position of the positioning rod 39 are opened on the adjusting disk 32, and the positioning holes 321 can pass through the positioning rod to position the rotating shaft, and all the positioning holes are arranged in a ring on the edge of the adjusting disk.

[0053] To adjust the height of the track arc, pull the adjustment dial outward to disengage the positioning rod from the positioning hole. The height of the track arc can then be adjusted by rotating the adjustment dial. Once adjusted to the desired position, push the adjustment dial inward to lock the positioning rod into the ring positioning hole. The accuracy of the height adjustment can be adjusted by adjusting the sparseness of the positioning holes.

[0054] The positioning rod 39 in this embodiment can be one, such as Figure 4 As shown; it can also be multiple, such as Figure 5 As shown, once the positioning rod is adjusted into position, it will be fine if it is aligned with the positioning hole.

[0055] Example 3

[0056] The difference between this embodiment and embodiment 1 mainly lies in the structure of the track arc.

[0057] In this embodiment, the structure of the track arc 4 is as follows: Figures 6 to 8As shown, it is composed of two parallel arc-shaped rails. The bottom ends of the two arc-shaped rails above the lifting and adjusting mechanism are connected into an integral structure through a fixed plate. C-shaped grooves 41 are provided on the opposite surfaces of the two arc-shaped rails. Sliders 52 are slidably mounted in the C-shaped grooves 41. The two slides 52 are fixedly connected by a horizontal connecting plate 51, and the horizontal connecting plate 51 is fixedly arranged at the bottom end of the moving arc. The moving arc fixing frame 8 is an inverted U-shaped structure, as shown in FIG. Figure 7 shown.

[0058] The two ends of the two arc-shaped tracks are set as arc-shaped closed settings, so that the moving arc can be set downward after the end is rotated, which is convenient for use when a large angle of needle insertion is required under special circumstances.

[0059] In order to ensure the stability of the rack during the lifting process, this embodiment also opens a groove on the inner wall of the other side of the fixed base opposite to the rack, and a vertical guide slider 341 is set in the groove. The top of the guide slider 341 and the rack 34 are fixedly connected to the bottom end surface of the track arc.

[0060] Of course, when the present invention is used, the moving arc can also be replaced by an upright rectangular structure track, so that the parallel needle insertion method of the traditional puncture template can be restored.

Claims

1. Universal puncture frame for prostate cancer via perineum, characterized by: The invention comprises a puncture needle positioning assembly mounted on a rectal ultrasound probe (1) via a base (2), the puncture needle positioning assembly comprising a horizontally arranged track arc (4) and a vertically arranged moving arc (5) slidably assembled on the track arc, a puncture needle positioning mechanism (6) for positioning the puncture needle being slidably arranged on the moving arc; the moving arc (5) and the track arc (4) are concentric with each other and the center of the circle is located directly above the front end of the rectal ultrasound probe, and the puncture needle positioning mechanism (6) is arranged on the diameter of the moving arc; The base (2) is mounted on the rectal ultrasound probe (1) and fixed by a locking mechanism. The base can be configured as a cylindrical structure with an axial opening, and a positioning plate is provided at the opening. The locking mechanism includes a matching bolt and nut, and through holes are provided on the two positioning plates. The bolt passes through the through holes of the two positioning plates and is fastened by the nut. The track arc (4) is arranged above the base (2) via a fixed seat (3), and a lifting adjustment mechanism for adjusting the vertical height of the track arc (4), the moving arc thereon, and the puncture needle positioning mechanism is arranged in the fixed seat (3); The lifting and adjusting mechanism comprises a rotating shaft (31) which passes through the side wall of the fixing seat and is installed in the inner cavity of the fixing seat (3); an adjusting disk (32) is provided at one end of the rotating shaft (31) extending out of the fixing seat (3); an adjusting gear (33) is fixedly provided on the rotating shaft (31) located in the inner cavity of the fixing seat (3); a groove is vertically provided on the inner wall of the fixing seat (3); a rack (34) is slidably mounted in the groove and meshes with the adjusting gear (33) and can slide up and down along the groove; the track arc (4) is fixedly installed at the top end of the rack (34) extending out of the fixing seat (3); The fixing seat (3) is also provided with a lifting mechanism positioning component for fixing the lifting adjustment mechanism; The lifting mechanism positioning assembly comprises a sector block (35) arranged in the inner cavity of the fixed seat (3) through a pin shaft, a double-cone push block (38) fixedly arranged on the rotating shaft (31) located above the sector block (35), a positioning gear (37) fixedly arranged on the rotating shaft on one side of the double-cone push block (38), and a straight tooth (36) meshing with the positioning gear is horizontally arranged at the top edge of the double-cone push block (38) located below the positioning gear (37); the rotating shaft (31) is hollow and penetrates the optical axis in the inner cavity of the fixed seat (3), and the optical axis and the rotating shaft are slidably matched.

2. The universal transperineal puncture holder for prostate cancer according to claim 1, characterized in that: The track arc (4) is composed of two parallel arc tracks, and the bottom ends of the two arc track parts located above the lifting and adjusting mechanism are connected to form an integrated structure through a fixed plate; C-shaped grooves (41) are opened on the opposite surfaces of the two arc tracks, and a slider (52) is slidably mounted in the C-shaped groove (41), and the two sliders (52) are fixedly connected by a horizontal connecting plate (51), and the horizontal connecting plate (51) is fixedly arranged at the bottom end of the moving arc.

3. The universal transperineal puncture holder for prostate cancer according to claim 1, characterized in that: A moving arc fixing frame (8) is fixedly provided at the lower portion of the moving arc (5) and is connected across the track arc (4). A third fixing bolt (81) is transversely threadedly connected to the side wall of the moving arc fixing frame (8) to tighten the moving arc fixing frame (8) against the side wall of the track arc (4).

4. The universal transperineal puncture holder for prostate cancer according to claim 1, characterized in that: The puncture needle positioning mechanism (6) is slidably arranged on the movable arc (5) through the puncture needle positioning mechanism fixing frame (7), and the puncture needle positioning mechanism fixing frame (7) and the movable arc (5) are positioned by a second fixing bolt (71) connected by a transverse thread; the puncture needle positioning mechanism (6) comprises a sleeve (61) fixedly arranged in the middle of the puncture needle positioning mechanism fixing frame (7) and located in the arc-shaped slot of the movable arc (5) and positioning needle rings (65) located at both ends of the sleeve (61), and the sleeve (61) and the two positioning needle rings (65) are coaxial; a slender through hole is opened on the wall of the sleeve (61), and sleeves (62) are provided on the end surfaces of the sleeve at both ends of the slender through hole, and the two positioning needle rings (65) are connected by a connecting rod (63) passing through the sleeve (62) and the slender through hole, and the connecting rod (63) and the sleeve (62) are positioned by a first fixing bolt (64) threadedly connected to the sleeve.

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