Puncture guiding device for antenatal diagnosis

Abstract

The invention relates to the field of puncture guiding, in particular to a puncture guiding device for antenatal diagnos.The puncture guiding device comprises a probe clamping frame and a universal support, the probe clamping frame comprises a J-shaped clamping plate with the J-shaped cross section, and a straight clamping plate is installed at the short end of the J-shaped clamping plate in a hinged mode; the long end of the J-shaped clamping plate and the end, away from the J-shaped clamping plate, of the straight clamping plate are each connected with an arc-shaped opening and closing end, a fastening assembly is connected between the two opening and closing ends, a puncture positioning block is installed on the outer side face of the J-shaped clamping plate in a sliding mode, and an angle adjusting plate is installed at the end, away from the J-shaped clamping plate, of the puncture positioning block. A pin shaft is rotationally installed at the circle center of the angle adjusting plate, one end of the pin shaft is fixedly connected with a puncture needle guide column, a puncture guide hole penetrates through the portion between the two ends of the puncture needle guide column, and a puncture needle clamping assembly is installed on the puncture needle guide column. The device can adapt to ultrasonic probes of different sizes and different thicknesses, and the needle inserting angle of a puncture needle can be adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of puncture guidance, and particularly relates to a puncture guidance device for prenatal diagnosis. Background Art

[0002] Amniocentesis is a method of prenatal diagnosis and nursing, generally suitable for prenatal diagnosis in the second trimester of pregnancy. Amniocentesis refers to the process of inserting a slender needle through the pregnant woman's abdominal wall and uterine wall into the amniotic cavity under the guidance of ultrasonic waves. The specific operation is as follows: after using B-ultrasound to determine the fetal body of the patient, a lumbar puncture needle with a stylet is inserted into the correct position and into the amniotic cavity of the patient. At this time, first use a 2-ml syringe to aspirate 2 ml of amniotic fluid and discard it. This section of amniotic fluid may contain maternal cells; then use a 20-ml empty syringe to aspirate 20 ml of amniotic fluid for sampling.

[0003] Currently, the general puncture methods are divided into manual puncture or puncture using a puncture rack. Manual puncture relies on the doctor's experience. One hand holds the ultrasonic probe, and the other hand operates the puncture needle for puncture to make it enter the ultrasonic scanning plane. Its disadvantage is that during the puncture process, the ultrasonic probe and the puncture needle must be kept stable without shaking to avoid the puncture needle disappearing from the ultrasonic scanning plane. Moreover, the operation is limited, and generally more than two medical staff are required for operation and assistance.

[0004] For the existing ultrasonic puncture rack, when in use, it is assembled on the ultrasonic probe, and the puncture needle is punctured through the puncture needle barrel on the puncture rack. Due to the high accuracy required for puncture, generally, an ultrasonic probe puncture rack is used to guide the puncture needle.

[0005] However, the models of the existing puncture racks are relatively fixed, and there are multiple ultrasonic probes with different models on an ultrasonic instrument. The existing puncture racks cannot be adjusted accordingly according to the size of the probe. Instead, multiple puncture racks matching the probes that may need to be used need to be prepared in advance. Moreover, the guiding cylinder of the puncture needle is generally at one end of the puncture rack and its position cannot be adjusted. Therefore, only the puncture position where the puncture needle is parallel to the imaging plane of the ultrasonic probe (in-plane mode) can be achieved. When the puncture needle needs to reach a puncture position perpendicular to the imaging plane of the ultrasonic probe at 90° (out-of-plane mode), the corresponding puncture rack needs to be replaced, resulting in a relatively single use method of the existing puncture rack.

[0006] In addition, the puncture needle guiding cylinder on the puncture rack only has the function of puncture guidance. When the puncture needle reaches the puncture depth, the doctor needs to take a syringe and connect it to the top of the puncture needle for amniotic fluid extraction. During this process, since the puncture needle is in a free state, once the depth of the puncture needle changes (when it is inserted or withdrawn a certain distance) during the process of connecting the syringe and extracting amniotic fluid, the effect of puncture sampling will be affected.

[0007] Therefore, based on the defects existing in the prior art, the present invention provides a puncture guiding device for prenatal diagnosis to solve the above problems. Summary of the Invention

[0008] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a puncture guiding device for prenatal diagnosis to solve the problems raised in the above background art.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0010] A puncture guiding device for prenatal diagnosis, comprising a probe holder and a universal bracket. The probe holder includes a J-shaped clamping plate with a cross-section in the shape of a "J". One end of the shorter part of the J-shaped clamping plate is hinged with a straight clamping plate. The longer end of the J-shaped clamping plate and the end of the straight clamping plate away from the J-shaped clamping plate are both connected with arc-shaped opening and closing ends. A fastening component is connected between the two opening and closing ends. A puncture positioning block is slidably mounted on the outer side surface of the J-shaped clamping plate. One end of the puncture positioning block away from the J-shaped clamping plate is provided with an angle adjusting plate. A pin shaft is rotatably mounted at the center of the angle adjusting plate. One end of the pin shaft is fixedly connected with a puncture needle guiding column. A puncture needle guiding hole penetrates between the two ends of the puncture needle guiding column. A puncture needle clamping component is mounted on the puncture needle guiding column.

[0011] Preferably, the fastening component includes a fastening bolt, a fastening base block, a fastening groove, and a fastening nut;

[0012] The fastening bolt that can swing on a horizontal plane is hinged and mounted on the outer side of the opening and closing end connected to the straight clamping plate. The fastening base block is fixedly mounted on the outer side of the opening and closing end connected to the J-shaped clamping plate. A fastening groove is opened at one end of the fastening base block away from the opening and closing end. The fastening nut is threadedly mounted on the outer side of the fastening bolt.

[0013] Preferably, the universal bracket is composed of a plurality of bracket rods hinged together. A bracket bolt is mounted at the hinged part of every two bracket rods. The top end of the universal bracket is fixedly mounted with a bracket connecting cylinder. A bracket connecting groove that can be stuck on the outer side of the fastening bolt is opened at one end of the bracket connecting cylinder away from the universal bracket. Frosted parts are mounted on the front side surface of the fastening base block and the rear side surface of the bracket connecting cylinder. The fastening nut can make the bracket connecting cylinder and the fastening base block closely abut. A stop block is mounted at the right end of the front side surface of the fastening base block.

[0014] Preferably, telescopic grooves are formed on the end faces of the longer ends of the J-shaped clamping plates and on the end faces of the straight clamping plates away from the J-shaped clamping plates. Each opening and closing end is fixedly connected with a telescopic clamping plate. Each telescopic clamping plate is slidably installed in the corresponding telescopic groove. Telescopic screw holes are formed on the end faces of the inner ends of each telescopic clamping plate in the telescopic grooves. Telescopic screw rods threadedly engaged with the telescopic screw holes are rotatably installed in each telescopic groove. Each telescopic screw rod is coaxially and fixedly installed with a telescopic worm gear. Telescopic worm shafts engaged with the telescopic worm gears are rotatably installed in the telescopic grooves. One end of each telescopic worm shaft is coaxially and fixedly connected with a telescopic knob located outside the telescopic groove.

[0015] Preferably, auxiliary clamping sliding grooves penetrate between the front and rear sides of the longer ends of the J-shaped clamping plates and between the front and rear sides of the straight clamping plates. Auxiliary clamping boxes corresponding to the positions of the auxiliary clamping sliding grooves are fixedly installed on the outer sides of the J-shaped clamping plates and the straight clamping plates. Auxiliary clamping sliders are slidably installed back and forth in each auxiliary clamping sliding groove. Each auxiliary clamping slider is fixedly connected with an auxiliary clamping plate located inside the probe clamping frame. Auxiliary clamping screw holes are formed on the end faces of the inner ends of each auxiliary clamping slider in the auxiliary clamping sliding grooves. Auxiliary clamping screw rods threadedly engaged with the auxiliary clamping screw holes are rotatably installed in each auxiliary clamping box. Each auxiliary clamping screw rod is coaxially and fixedly connected with an auxiliary clamping knob located outside the auxiliary clamping box.

[0016] Preferably, a puncture positioning sliding groove with a cross-section in the shape of "J" is formed on the outer side of the J-shaped clamping plate. The puncture positioning block is slidably installed in the puncture positioning sliding groove. A puncture bolt groove in the shape of "J" penetrates between the bottom surface of the puncture positioning sliding groove and the bottom surface of the J-shaped clamping plate. A puncture positioning bolt is penetrated and threadedly installed between the top surface and the bottom surface of the puncture positioning block. A plurality of puncture positioning holes are evenly distributed on the top surface of the puncture positioning sliding groove. The bottom end of the puncture positioning bolt passes downward through the puncture bolt groove and extends below the bottom surface of the J-shaped clamping plate. A puncture positioning knob is fixedly installed at the bottom end of the puncture positioning bolt.

[0017] Preferably, a hollow rotating adjustment cylinder is rotatably connected to one end of the puncture positioning block away from the J-shaped clamping plate. The angle adjustment plate is fixedly installed on the rotating adjustment cylinder. A worm gear shaft penetrating into the interior of the rotating adjustment cylinder is fixedly connected to one end of the puncture positioning block away from the J-shaped clamping plate. A fixed worm gear is fixedly installed on the worm gear shaft. A rotating adjustment worm engaged with the fixed worm gear is rotatably installed in the interior of the rotating adjustment cylinder. A rotating adjustment knob located outside the rotating adjustment cylinder is coaxially and fixedly connected to the rotating adjustment worm.

[0018] Preferably, an angle adjustment arc groove centered on the pin shaft penetrates between the front and rear sides of the angle adjustment plate. An angle adjustment bolt passing through the angle adjustment arc groove is fixedly installed on the outer side surface of the puncture needle guiding column. An angle adjustment nut is threadedly installed on the outer side of the angle adjustment bolt. Angle adjustment scales are provided on the side surface of the angle adjustment plate, and a scale pointer is installed on the puncture needle guiding column.

[0019] Preferably, the puncture needle clamping assembly includes a clamping V-groove, a V-column sliding ring, a V-column sliding rod, a clamping V-column, a puncture needle clamping arc groove, and a puncture needle clamping rubber strip;

[0020] A clamping V-groove is formed between the puncture needle guiding hole and the outer side surface of the puncture needle guiding column. Two V-column sliding rings that are symmetrically arranged up and down in position are fixedly installed on the left side of the outer side surface of the puncture needle guiding column. A V-column sliding rod is slidably installed back and forth in each of the two V-column sliding rings. The front ends of the two V-column sliding rods are fixedly connected together to form a clamping V-column located inside the clamping V-groove. A puncture needle clamping arc groove is formed at one end of the clamping V-column close to the puncture needle guiding hole, and a plurality of puncture needle clamping rubber strips are installed on the arc surface of the puncture needle clamping arc groove.

[0021] Preferably, a clamping rack plate extending to the right is fixedly installed on the front arc surface of the clamping V-column. The right end of the clamping rack plate is fixedly connected to a puncture needle clamping rack extending rearward. A puncture needle clamping gear that is located on the right side of the puncture needle clamping rack and meshes with it is rotatably installed on the outer side surface of the puncture needle guiding column on the right side. The puncture needle clamping gear is connected with a torsion spring, and a puncture needle clamping dial is fixedly connected to the outer side surface of the puncture needle clamping gear.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The fastening assembly is used to fix between the two opening and closing ends, thereby realizing the fixed clamping of the ultrasonic probe. The universal bracket can be quickly disassembled and installed with the fastening assembly. The puncture positioning block can move along the contour direction of the J-shaped clamping plate, so as to adjust the relative position between the puncture needle guiding column and the probe clamping frame. It can not only realize the puncture method in which the puncture needle is parallel to the imaging plane of the ultrasonic probe (in-plane method), but also realize the puncture method in which the puncture needle is perpendicular to the imaging plane of the ultrasonic probe by 90° (out-of-plane method), and can also realize the position adjustment of the puncture needle at any other angle with respect to the imaging plane of the ultrasonic probe.

[0024] 2. The puncture needle guiding column can swing around the pin shaft as the axis, so as to adjust its angle on the angle adjusting plate and realize the adjustment of the puncture angle of the puncture needle. A puncture needle guiding hole runs through between the two ends of the puncture needle guiding column. After the puncture angle is adjusted, the puncture needle can be placed at the top of the puncture needle guiding hole and inserted downward along the puncture needle guiding hole into the patient's body until the puncture needle appears in the ultrasonic image.

[0025] 3. A puncture needle clamping assembly is installed on the puncture needle guiding column. When the puncture needle appears in the ultrasonic image, in order to avoid the puncture needle advancing or retracting when taking the syringe and connecting it to the puncture needle for sampling, after the puncture needle reaches the designated position, it can be clamped and fixed by the puncture needle clamping assembly, so that the puncture needle is in a fixed state and will not advance or retract again.

[0026] 4. The telescopic clamping plate is slidably installed in the corresponding telescopic groove, so that the length of the entire ultrasonic probe clamping bracket can be adjusted, so as to adapt to ultrasonic probes of different sizes. Multiple probes on the same ultrasonic device can be installed and fixed with the ultrasonic probe clamping bracket. The two auxiliary clamping sliders drive the two auxiliary clamping plates to move towards the middle of the ultrasonic probe clamping bracket to clamp both sides of the ultrasonic probe, so as to adapt to ultrasonic probes of different thicknesses. Brief Description of the Drawings

[0027] Figure 1 It is a three-dimensional schematic diagram when the ultrasonic probe clamping bracket and the universal bracket of the present invention are connected.

[0028] Figure 2 For the present invention Figure 1 The enlarged view at A in

[0029] Figure 3 It is the three-dimensional schematic of the ultrasonic probe clamping bracket of the present invention Figure 1 .

[0030] Figure 4 It is the three-dimensional schematic of the ultrasonic probe clamping bracket of the present invention Figure 2 .

[0031] Figure 5 It is the front view of the ultrasonic probe clamping bracket of the present invention.

[0032] Figure 6 For the present invention Figure 5 The sectional view at B-B in

[0033] Figure 7 For the present invention Figure 6 The enlarged view at C in

[0034] Figure 8 For the present invention Figure 3 The enlarged view at D in

[0035] Figure 9 For the present invention Figure 4 An enlarged view of location E in the present invention.

[0036] Figure 10 A sectional view of the puncture positioning block and the rotation adjustment cylinder of the present invention.

[0037] Figure 11 For the present invention Figure 10 An enlarged view of location F in the present invention.

[0038] Figure 12 A three-dimensional schematic diagram when the clamping V-shaped column of the present invention is opened outward.

[0039] In the figure: 1. Probe clamping frame; 2. Universal support; 3. J-shaped clamping plate; 4. Straight clamping plate; 5. Opening and closing end; 6. Fastening assembly; 7. Puncture positioning block; 8. Angle adjustment plate; 9. Pin shaft; 10. Puncture needle guiding column; 101. Puncture needle guiding hole; 11. Puncture needle clamping assembly; 12. Fastening bolt; 13. Fastening base block; 14. Fastening groove; 15. Fastening nut; 16. Frosted part; 17. Support rod; 18. Support bolt; 19. Support connecting cylinder; 20. Support connecting groove; 21. Block; 22. Telescopic groove; 23. Telescopic clamping plate; 24. Telescopic screw hole; 25. Telescopic lead screw; 26. Telescopic worm gear; 27. Telescopic worm; 28. Telescopic knob; 29. Auxiliary clamping chute; 30. Auxiliary clamping box; 31. Auxiliary clamping slider; 32. Auxiliary clamping plate; 33. Auxiliary clamping screw hole; 34. Auxiliary clamping lead screw; 35. Auxiliary clamping knob; 36. Puncture positioning chute; 37. Puncture bolt groove; 38. Puncture positioning bolt; 39. Puncture positioning hole; 40. Puncture positioning knob; 41. Rotation adjustment cylinder; 42. Fixed worm gear; 43. Rotation adjustment worm; 44. Rotation adjustment knob; 45. Angle adjustment arc groove; 46. Angle adjustment bolt; 47. Angle adjustment nut; 48. Angle adjustment scale; 49. Scale pointer; 50. Clamping V-shaped groove; 51. V-shaped column sliding ring; 52. V-shaped column sliding rod; 53. Clamping V-shaped column; 54. Puncture needle clamping arc groove; 55. Puncture needle clamping rubber strip; 56. Clamping rack plate; 57. Puncture needle clamping rack; 58. Puncture needle clamping gear; 59. Puncture needle clamping dial. Detailed implementation manners

[0040] Next, the embodiments of the present invention will be described in detail with reference to the attached Figures 1 - 12 description.

[0041] A puncture guiding device for prenatal diagnosis, as shown in the attached Figures 1 - 12As shown in the figure, it includes a probe holder 1 and a universal bracket 2. The probe holder 1 is detachably connected to the universal bracket 2. When it is necessary to fix the ultrasonic probe, it can be fixed to the universal bracket 2. The probe holder 1 includes a J-shaped clamping plate 3 with a cross-section in the shape of a "J". One end of the shorter part of the J-shaped clamping plate 3 is hingedly installed with a straight clamping plate 4. An arc-shaped opening and closing end 5 is connected to the longer end of the J-shaped clamping plate 3 and the end of the straight clamping plate 4 away from the J-shaped clamping plate 3. A fastening component 6 is connected between the two opening and closing ends 5. The straight clamping plate 4 can be opened outward, so that the two opening and closing ends 5 are separated. Then the ultrasonic probe can be placed inside the J-shaped clamping plate 3. Then close the straight clamping plate 4 and fix the two opening and closing ends 5 through the fastening component 6, so as to realize the fixed clamping of the ultrasonic probe. The universal bracket 2 can be quickly disassembled and installed with the fastening component 6;

[0042] A puncture positioning block 7 is slidably installed on the outer side surface of the J-shaped clamping plate 3. An angle adjustment plate 8 is installed at one end of the puncture positioning block 7 away from the J-shaped clamping plate 3. The puncture positioning block 7 can move along the contour direction of the J-shaped clamping plate 3, so that the relative position between the puncture needle guide column 10 and the probe holder 1 can not only realize the puncture method in which the puncture needle is parallel to the imaging plane of the ultrasonic probe (in-plane method), but also realize the puncture method in which the puncture needle is perpendicular to the imaging plane of the ultrasonic probe at 90° (out-of-plane method), and can also realize the position adjustment of any other angle between the puncture needle and the imaging plane of the ultrasonic probe;

[0043] A pin shaft 9 is rotatably installed at the center of the angle adjustment plate 8. One end of the pin shaft 9 is fixedly connected with a puncture needle guide column 10. The puncture needle guide column 10 can swing around the pin shaft 9 as the axis, so as to adjust its angle on the angle adjustment plate 8 and realize the adjustment of the puncture angle of the puncture needle. A puncture needle guide hole 101 runs through between the two ends of the puncture needle guide column 10. After the puncture angle is adjusted, the puncture needle can be placed at the top of the puncture needle guide hole 101 and inserted downward along the puncture needle guide hole 101 into the patient's body until the puncture needle appears in the ultrasonic image. A puncture needle clamping component 11 is installed on the puncture needle guide column 10. When the puncture needle appears in the ultrasonic image, in order to avoid the puncture needle advancing or retracting when taking the syringe and connecting it to the puncture needle for sampling, after the puncture needle reaches the specified position, it can be clamped and fixed by the puncture needle clamping component 11, so that the puncture needle is in a fixed state and will not advance or retract again.

[0044] As shown in the appendix Figures 1 - 4 As shown in the figure, the fastening component 6 includes a fastening bolt 12, a fastening base block 13, a fastening groove 14, and a fastening nut 15;

[0045] On the outside of the opening and closing end 5 connected to the straight clamping plate 4, a fastening bolt 12 capable of swinging on a horizontal plane is hingedly installed. The fastening bolt 12 is installed on the outside of the opening and closing end 5 through a rotating shaft. On the outside of the opening and closing end 5 connected to the J-shaped clamping plate 3, a fastening base block 13 is fixedly installed. One end of the fastening base block 13 far away from the opening and closing end 5 is provided with a fastening groove 14. A fastening nut 15 is threadedly installed on the outside of the fastening bolt 12. The fastening bolt 12 can swing into the fastening groove 14, and then the fastening nut 15 is tightened towards the direction of the fastening base block 13, so as to realize the fixation between the two opening and closing ends 5, thereby clamping and fixing the ultrasonic probe.

[0046] As shown in the attached Figures 1 - 2 figure, the universal bracket 2 is composed of a plurality of bracket rods 17 hinged together. A bracket bolt 18 is installed at the hinge of every two bracket rods 17. When the bracket bolt 18 is loosened, the angle between the bracket rods 17 can be adjusted. Then, by tightening the bracket bolt 18, the fixation between the plurality of bracket rods 17 can be realized. The bottommost bracket rod 17 is connected to a base that can be fixed on the examination bed. The top end of the universal bracket 2 is fixedly installed with a bracket connecting cylinder 19. One end of the bracket connecting cylinder 19 far away from the universal bracket 2 is provided with a bracket connecting groove 20 that can be stuck on the outside of the fastening bolt 12. Frosted parts 16 are installed on the front side of the fastening base block 13 and the rear side of the bracket connecting cylinder 19. The fastening nut 15 can make the bracket connecting cylinder 19 and the fastening base block 13 closely abut against each other. As shown in the attached Figure 2 figure, when the ultrasonic probe needs to be fixed by the universal bracket 2, the bracket connecting groove 20 on the bracket connecting cylinder 19 can be stuck on the outside of the fastening bolt 12, and then the fastening nut 15 is tightened towards the direction of the bracket connecting cylinder 19 to realize the connection. The frosted parts 16 can increase the friction between the bracket connecting cylinder 19 and the fastening base block 13, thereby avoiding relative rotation. A stop block 21 is installed at the right end of the front side of the fastening base block 13. The stop block 21 can block the bracket connecting cylinder 19 to prevent it from falling off. The bracket connecting cylinder 19 can only be removed by loosening the fastening nut 15.

[0047] As shown in the attached Figures 6 - 7As shown in the figure, telescopic grooves 22 are provided on the end faces of the longer ends of the J-shaped clamping plates 3 and on the end faces of the ends of the straight clamping plates 4 away from the J-shaped clamping plates 3. Each opening and closing end 5 is fixedly connected with a telescopic clamping plate 23. Each telescopic clamping plate 23 is slidably installed in the corresponding telescopic groove 22, so that the length of the entire probe clamping frame 1 can be adjusted, so as to be able to adapt to ultrasonic probes of different sizes. Multiple probes on the same ultrasonic device can all be installed and fixed with the probe clamping frame 1. On the end faces of the inner ends of each telescopic clamping plate 23 located inside the telescopic groove 22, telescopic screw holes 24 are provided. In each telescopic groove 22, a telescopic screw rod 25 that is in threaded cooperation with the telescopic screw hole 24 is rotatably installed. Each telescopic screw rod 25 is coaxially and fixedly installed with a telescopic worm gear 26. In the telescopic groove 22, a telescopic worm 27 that meshes with the telescopic worm gear 26 is rotatably installed. One end of the telescopic worm 27 is coaxially and fixedly connected with a telescopic knob 28 located outside the telescopic groove 22. When adjusting, turn the telescopic knob 28, which can drive the telescopic worm 27 to rotate. The telescopic worm 27 meshes and drives the telescopic worm gear 26 and the telescopic screw rod 25 to rotate, so as to drive the telescopic clamping plate 23 to perform telescopic movement. The telescopic clamping plate 23 is provided with size scales, and the distance between the two telescopic clamping plates 23 can be adjusted according to the size scales, so as to realize the length adjustment of the probe clamping frame 1.

[0048] As shown in the attached Figures 6 - 7 figure, auxiliary clamping sliding grooves 29 penetrate between the front and rear sides of the longer ends of the J-shaped clamping plates 3 and between the front and rear sides of the straight clamping plates 4. Auxiliary clamping boxes 30 corresponding to the positions of the auxiliary clamping sliding grooves 29 are fixedly installed on the outer sides of the J-shaped clamping plates 3 and the straight clamping plates 4. In each auxiliary clamping sliding groove 29, an auxiliary clamping slider 31 is slidably installed back and forth. Each auxiliary clamping slider 31 is fixedly connected with an auxiliary clamping plate 32 located inside the probe clamping frame 1. Driving the two auxiliary clamping sliders 31 to drive the two auxiliary clamping plates 32 to move towards the middle of the probe clamping frame 1 can clamp both sides of the ultrasonic probe, so as to be able to adapt to ultrasonic probes of different thicknesses;

[0049] On the end face of one end of each of the auxiliary clamping sliders 31 located inside the auxiliary clamping chute 29, an auxiliary clamping screw hole 33 is provided. Inside each of the auxiliary clamping boxes 30, an auxiliary clamping screw rod 34 that is in threaded cooperation with the auxiliary clamping screw hole 33 is rotatably installed. Each of the auxiliary clamping screw rods 34 is coaxially and fixedly connected to an auxiliary clamping knob 35 located outside the auxiliary clamping box 30. During adjustment, the auxiliary clamping knob 35 can be rotated to drive the auxiliary clamping screw rod 34 to rotate, causing a threaded drive with the auxiliary clamping screw hole 33, thereby driving the auxiliary clamping slider 31 to move within the auxiliary clamping chute 29, so as to adjust the distance between the two auxiliary clamping plates 32. When the thickness of the ultrasonic probe is less than the dimension between the front and rear inner walls of the probe clamping bracket 1, the above method can be used for adjustment to clamp the front and rear sides of the ultrasonic probe with the two auxiliary clamping plates 32. Dimension scales are provided on both of the auxiliary clamping sliders 31, and the two auxiliary clamping plates 32 are adjusted at equal distances according to the scales, so that the ultrasonic probe is located exactly in the middle of the probe clamping bracket 1.

[0050] As shown in the attached Figure 8 , Figure 10 , Figure 11 figures, on the outer side surface of the J-shaped clamping plate 3, a puncture positioning chute 36 with a cross-section in the shape of a "J" is provided. The puncture positioning block 7 is slidably installed in the puncture positioning chute 36 and can move along the puncture positioning chute 36. When the puncture positioning block 7 is at the left end of the probe clamping bracket 1, a puncture method in which the puncture needle is parallel to the imaging plane of the ultrasonic probe (in-plane method) can be performed. When the puncture positioning block 7 is at the front side of the probe clamping bracket 1, a puncture method in which the puncture needle is perpendicular to the imaging plane of the ultrasonic probe by 90° (out-of-plane method) can be performed. When the puncture positioning block 7 is at other positions of the probe clamping bracket 1, a puncture method in which the puncture needle forms any other angle with the imaging plane of the ultrasonic probe can be performed;

[0051] A "J"-shaped puncture bolt groove 37 runs through between the bottom surface of the puncture positioning chute 36 and the bottom surface of the J-shaped clamping plate 3. A puncture positioning bolt 38 is threaded through and installed between the top surface and the bottom surface of the puncture positioning block 7. A plurality of equally spaced puncture positioning holes 39 are formed in the top surface of the puncture positioning chute 36. The bottom end of the puncture positioning bolt 38 passes downward through the puncture bolt groove 37 and extends below the bottom surface of the J-shaped clamping plate 3. A puncture positioning knob 40 is fixedly installed at the bottom end of the puncture positioning bolt 38. When it is necessary to adjust the puncture position, the puncture positioning knob 40 can be rotated to screw the puncture positioning bolt 38 out of the current puncture positioning hole 39. At this time, the puncture positioning block 7 can be moved, and at the same time, the puncture positioning bolt 38 moves synchronously in the puncture bolt groove 37. After adjusting to the puncture position, the puncture positioning bolt 38 can be screwed into the corresponding puncture positioning hole 39 to fix the puncture positioning block 7, so as to achieve the adjustment of parallel between the puncture needle and the imaging plane of the ultrasonic probe (in-plane mode), 90° perpendicular between the puncture needle and the imaging plane of the ultrasonic probe (out-of-plane mode), and any other angle between the puncture needle and the imaging plane of the ultrasonic probe.

[0052] As shown in the attached Figure 8 , Figure 10 , Figure 11 As shown, a rotatably connected hollow rotary adjustment cylinder 41 is provided at one end of the puncture positioning block 7 away from the J-shaped clamping plate 3. The angle adjustment plate 8 is fixedly installed on the rotary adjustment cylinder 41. The rotary adjustment cylinder 41 can rotate and drive the angle adjustment plate 8 to deflect. When performing a puncture at a position where the puncture needle is 90° perpendicular to the imaging plane of the ultrasonic probe (out-of-plane mode), if it is necessary to change the puncture needle insertion angle at this position, the rotary adjustment cylinder 41 can be rotated to drive the angle adjustment plate 8 to deflect, thereby driving the puncture needle guide column 10 to deflect. Then the puncture needle guide hole 101 will also deflect, and the puncture needle insertion angle is adjusted. A worm gear shaft penetrating into the rotary adjustment cylinder 41 is fixedly connected to one end of the puncture positioning block 7 away from the J-shaped clamping plate 3. A fixed worm gear 42 is fixedly installed on the worm gear shaft. When the rotary adjustment cylinder 41 rotates, the fixed worm gear 42 remains stationary. A rotary adjustment worm 43 meshing with the fixed worm gear 42 is rotatably installed inside the rotary adjustment cylinder 41. The rotary adjustment worm 43 is coaxially fixedly connected to a rotary adjustment knob 44 located outside the rotary adjustment cylinder 41. When adjustment is required, the rotary adjustment knob 44 can be screwed to drive the rotary adjustment worm 43 to rotate. Meshing transmission is generated between the rotary adjustment worm 43 and the fixed worm gear 42. Since the fixed worm gear 42 cannot rotate, when the rotary adjustment worm 43 rotates, it will move circumferentially around the fixed worm gear 42, thereby driving the rotary adjustment cylinder 41 to rotate and realizing the adjustment of the puncture needle insertion angle.

[0053] As shown in the attached Figures 8 - 12As shown, an angle adjustment arc groove 45 centered on the pin shaft 9 runs through the front and rear sides of the angle adjustment plate 8. An angle adjustment bolt 46 passing through the angle adjustment arc groove 45 is fixedly installed on the outer side surface of the puncture needle guiding column 10. When the puncture needle guiding column 10 swings, the angle adjustment bolt 46 can move in an arc direction within the angle adjustment arc groove 45. An angle adjustment nut 47 is threadedly installed on the outer side of the angle adjustment bolt 46. By tightening the angle adjustment nut 47, the puncture needle guiding column 10 can be fixed. An angle adjustment scale 48 is provided on the side surface of the angle adjustment plate 8, and a scale pointer 49 is installed on the puncture needle guiding column 10, and the needle insertion angle can be adjusted according to the angle adjustment scale 48.

[0054] As shown in the attached Figures 9 - 10 figure, the puncture needle clamping assembly 11 includes a clamping V-groove 50, a V-column sliding ring 51, a V-column sliding rod 52, a clamping V-column 53, a puncture needle clamping arc groove 54, and a puncture needle clamping rubber strip 55;

[0055] A clamping V-groove 50 is formed between the puncture needle guiding hole 101 and the outer side surface of the puncture needle guiding column 10. Two V-column sliding rings 51 that are symmetrically arranged up and down in position are fixedly installed on the left side of the outer side surface of the puncture needle guiding column 10. A V-column sliding rod 52 is slidably installed back and forth in each of the two V-column sliding rings 51. The front ends of the two V-column sliding rods 52 are fixedly connected to a clamping V-column 53 located inside the clamping V-groove 50. The sliding between the two V-column sliding rods 52 and the V-column sliding rings 51 enables the clamping V-column 53 to only move radially within the clamping V-groove 50. A puncture needle clamping arc groove 54 is formed at one end of the clamping V-column 53 close to the puncture needle guiding hole 101. A plurality of puncture needle clamping rubber strips 55 are installed on the arc surface of the puncture needle clamping arc groove 54. When the puncture needle is inserted through the puncture needle guiding hole 101 for puncture, by applying a puncture pressure to the puncture needle, the friction force between the puncture needle and the puncture needle clamping rubber strips 55 can be overcome, enabling the puncture needle to smoothly puncture into the patient's body. When the puncture reaches the specified depth, the puncture needle can be directly released. At this time, the puncture needle can be clamped and fixed by the clamping V-column 53, and the friction force between the plurality of puncture needle clamping rubber strips 55 on its inner side and the puncture needle can maintain the current position of the puncture needle, and the puncture needle will not move forward or backward again during the operation;

[0056] In addition, when it is necessary to puncture puncture needles with different diameters, the clamping V-column 53 can be moved outward, and then a puncture needle with a larger diameter can be passed through the clamping V-groove 50. Then, the clamping V-column 53 is moved into the clamping V-groove 50, so that the puncture needle can be clamped in the clamping V-groove 50 and puncture guidance can be provided, and the plurality of puncture needle clamping rubber strips 55 on the inner side of the clamping V-column 53 can perform friction positioning on the puncture needle.

[0057] As attached Figure 8 , Figure 12 As shown, a clamping rack plate 56 extending to the right is fixedly installed on the front curved surface of the clamping V-shaped column 53, and a puncture needle clamping rack 57 extending to the rear is fixedly connected to the right end of the clamping rack plate 56. The puncture needle clamping rack 57 can move synchronously with the clamping V-shaped column 53. A puncture needle clamping gear 58 located on the right side of the puncture needle clamping rack 57 and meshing with it is rotatably installed on the right side of the outer side surface of the puncture needle guide column 10. The puncture needle clamping gear 58 is connected to a torsion spring. When the puncture needle clamping gear 58 rotates, it can drive the torsion spring to store force. A puncture needle clamping dial plate 59 is fixedly connected to the outer side surface of the puncture needle clamping gear 58 to attach Figure 12 With reference to the direction shown in , when the puncture needle clamping plate 59 is toggled to the left, the puncture needle clamping gear 58 can be driven to rotate counterclockwise, and the puncture needle clamping gear 58 can drive the puncture needle clamping rack 57 to move, thereby driving the clamping V-shaped column 53 to move synchronously toward the outside of the clamping V-shaped groove 50, and the puncture needle can be placed in the clamping V-shaped groove 50. When the puncture needle clamping plate 59 is released, the puncture needle clamping gear 58 is reversed and reset under the elastic force of the torsion spring, thereby driving the puncture needle clamping rack 57 to reset, so that the clamping V-shaped column 53 moves synchronously toward the inside of the clamping V-shaped groove 50, thereby achieving guidance and clamping of the puncture needle.

[0058] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0059] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A puncture guide device for prenatal diagnosis, comprising a probe holder (1) and a universal bracket (2), characterized in that: The probe clamping frame (1) comprises a J-shaped clamping plate (3) with a "J"-shaped cross section, a straight clamping plate (4) is hingedly mounted on the shorter end of the J-shaped clamping plate (3), an arc-shaped opening and closing end (5) is connected to the longer end of the J-shaped clamping plate (3) and the end of the straight clamping plate (4) away from the J-shaped clamping plate (3), a fastening component (6) is connected between the two opening and closing ends (5), and a wear-through component (6) is slidably mounted on the outer surface of the J-shaped clamping plate (3). A puncture positioning block (7), wherein an angle adjustment plate (8) is installed at one end of the puncture positioning block (7) away from the J-shaped clamping plate (3), a pin shaft (9) is rotatably installed at the center of the circle of the angle adjustment plate (8), one end of the pin shaft (9) is fixedly connected to a puncture needle guide column (10), a puncture needle guide hole (101) passes through the two ends of the puncture needle guide column (10), and a puncture needle clamping assembly (11) is installed on the puncture needle guide column (10).

2. A puncture guide device for prenatal diagnosis according to claim 1, characterized in that: The fastening assembly (6) comprises a fastening bolt (12), a fastening base block (13), a fastening groove (14), and a fastening nut (15); A fastening bolt (12) capable of swinging in a horizontal plane is hingedly mounted on the outer side of the opening and closing end (5) connected to the straight clamping plate (4), a fastening base block (13) is fixedly mounted on the outer side of the opening and closing end (5) connected to the J-shaped clamping plate (3), a fastening groove (14) is formed at one end of the fastening base block (13) away from the closing end (5), and a fastening nut (15) is threadedly mounted on the outer side of the fastening bolt (12).

3. A puncture guide device for prenatal diagnosis according to claim 2, characterized in that: The universal bracket (2) is composed of a plurality of bracket rods (17) hingedly connected, and a bracket bolt (18) is installed at the hinge of each two bracket rods (17). A bracket connecting cylinder (19) is fixedly installed at the top end of the universal bracket (2), and a bracket connecting groove (20) capable of being clamped on the outside of the fastening bolt (12) is provided at the end of the bracket connecting cylinder (19) away from the universal bracket (2). The front side surface of the fastening base block (13) and the rear side surface of the bracket connecting cylinder (19) are both installed with a frosted portion (16). The fastening nut (15) can make the bracket connecting cylinder (19) tightly abut against the fastening base block (13), and a stopper (21) is installed at the right end of the front side surface of the fastening base block (13).

4. A puncture guide device for prenatal diagnosis according to claim 1, characterized in that: A telescopic groove (22) is provided on the end surface of the longer end of the J-shaped clamping plate (3) and the end surface of the straight clamping plate (4) away from the J-shaped clamping plate (3); each of the opening and closing ends (5) is fixedly connected to a telescopic clamping plate (23); each of the telescopic clamping plates (23) is slidably mounted in the corresponding telescopic groove (22); a telescopic screw hole (24) is provided on the end surface of the end of each of the telescopic clamping plates (23) located inside the telescopic groove (22); a telescopic screw rod (25) threadedly matched with the telescopic screw hole (24) is rotatably mounted in each of the telescopic grooves (22); each of the telescopic screw rods (25) is coaxially fixedly mounted with a telescopic worm wheel (26); a telescopic worm (27) meshing with the telescopic worm wheel (26) is rotatably mounted in the telescopic groove (22); one end of the telescopic worm (27) is coaxially fixedly connected to a telescopic knob (28) located outside the telescopic groove (22).

5. The puncture guide device for prenatal diagnosis according to claim 1, characterized in that: An auxiliary clamping slot (29) is passed through the front and rear side surfaces of the longer end of the J-shaped clamping plate (3) and the front and rear side surfaces of the straight clamping plate (4). An auxiliary clamping box (30) corresponding to the position of the auxiliary clamping slot (29) is fixedly installed on the outer side surfaces of the J-shaped clamping plate (3) and the straight clamping plate (4). An auxiliary clamping slide block (31) is slidably installed in each of the auxiliary clamping slots (29). Each of the auxiliary clamping slide blocks (31) is fixedly connected to a probe. An auxiliary clamping plate (32) is disposed on the inner side of the head clamping frame (1); an auxiliary clamping screw hole (33) is provided on the end surface of one end of each of the auxiliary clamping slide blocks (31) located inside the auxiliary clamping slot (29); an auxiliary clamping screw rod (34) threadedly matched with the auxiliary clamping screw hole (33) is rotatably installed in each of the auxiliary clamping boxes (30); and each of the auxiliary clamping screw rods (34) is coaxially fixedly connected with an auxiliary clamping knob (35) located on the outer side of the auxiliary clamping box (30).

6. The puncture guide device for prenatal diagnosis according to claim 1, characterized in that: The outer surface of the J-shaped clamping plate (3) is provided with a puncture positioning slot (36) with a "J"-shaped cross section, and the puncture positioning block (7) is slidably installed in the puncture positioning slot (36). A "J"-shaped puncture bolt slot (37) runs through the bottom surface of the puncture positioning slot (36) and the bottom surface of the J-shaped clamping plate (3). A puncture positioning bolt (38) runs through and is threadedly installed between the top surface and the bottom surface of the puncture positioning block (7). A plurality of puncture positioning holes (39) distributed at equal intervals are provided on the top surface of the puncture positioning slot (36). The bottom end of the puncture positioning bolt (38) passes downward through the puncture bolt slot (37) and extends to the bottom of the bottom surface of the J-shaped clamping plate (3), and a puncture positioning knob (40) is fixedly installed at the bottom end of the puncture positioning bolt (38).

7. The puncture guide device for prenatal diagnosis according to claim 1, characterized in that: The end of the puncture positioning block (7) away from the J-shaped clamping plate (3) is rotatably connected to an internal hollow rotation adjustment cylinder (41), the angle adjustment plate (8) is fixedly mounted on the rotation adjustment cylinder (41), the end of the puncture positioning block (7) away from the J-shaped clamping plate (3) is fixedly connected to a worm gear shaft penetrating into the interior of the rotation adjustment cylinder (41), a fixed worm wheel (42) is fixedly mounted on the worm gear shaft, a rotation adjustment worm (43) meshing with the fixed worm wheel (42) is rotatably mounted inside the rotation adjustment cylinder (41), and the rotation adjustment worm (43) is coaxially fixedly connected to a rotation adjustment knob (44) located outside the rotation adjustment cylinder (41).

8. The puncture guide device for prenatal diagnosis according to claim 1, characterized in that: An angle adjustment arc groove (45) with the pin shaft (9) as the center is penetrated between the front and rear sides of the angle adjustment plate (8); an angle adjustment bolt (46) passing through the angle adjustment arc groove (45) is fixedly installed on the outer side surface of the puncture needle guide column (10); an angle adjustment nut (47) is threadedly installed on the outer side of the angle adjustment bolt (46); an angle adjustment scale (48) is arranged on the side surface of the angle adjustment plate (8); and a scale pointer (49) is installed on the puncture needle guide column (10).

9. The puncture guide device for prenatal diagnosis according to claim 1, characterized in that: The puncture needle clamping assembly (11) comprises a clamping V-shaped groove (50), a V-shaped column sliding ring (51), a V-shaped column sliding rod (52), a clamping V-shaped column (53), a puncture needle clamping arc groove (54), and a puncture needle clamping rubber strip (55); A clamping V-shaped groove (50) is provided between the puncture needle guide hole (101) and the outer side surface of the puncture needle guide column (10), and two V-shaped column slip rings (51) symmetrically positioned up and down are fixedly installed on the left side of the outer side surface of the puncture needle guide column (10), and V-shaped column slide rods (52) are installed in the two V-shaped column slip rings (51) for sliding back and forth, and the front ends of the two V-shaped column slide rods (52) are fixedly connected to a clamping V-shaped column (53) located inside the clamping V-shaped groove (50), and a puncture needle clamping arc groove (54) is provided at one end of the clamping V-shaped column (53) close to the puncture needle guide hole (101), and a plurality of puncture needle clamping rubber strips (55) are installed on the arc surface of the puncture needle clamping arc groove (54).

10. The puncture guide device for prenatal diagnosis according to claim 9, characterized in that: A clamping rack plate (56) extending to the right is fixedly installed on the front curved surface of the clamping V-shaped column (53), and a puncture needle clamping rack (57) extending to the rear is fixedly connected to the right end of the clamping rack plate (56). A puncture needle clamping gear (58) located on the right side of the puncture needle clamping rack (57) and meshing with the puncture needle clamping gear (58) is rotatably installed on the right side of the outer side surface of the puncture needle guide column (10), and the puncture needle clamping gear (58) is connected to a torsion spring, and a puncture needle clamping plate (59) is fixedly connected to the outer side surface of the puncture needle clamping gear (58).

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