Needle distribution positioning system and positioning method for puncture operation

Abstract

The invention provides a needle distribution positioning system and method for puncture surgery, and relates to the technical field of medical instruments. Four sets of reset units are installed on the top of the supporting unit and used for resetting the supporting unit. A positioning unit is installed on the top of the supporting unit and used for positioning a puncture needle. Two groups of pressing units are mounted on the positioning unit and are used for pressing the supporting unit; an auxiliary unit is mounted on the positioning unit and is used for improving the positioning precision of the positioning unit; the positioning circular ring B is mounted on the auxiliary positioning frame in a sliding manner, and the positioning circular ring B is in interference fit with the auxiliary positioning frame; the positioning ring B also plays a role in positioning the middle of the puncture needle, so that the positioning precision of the puncture needle is improved; the problems that generally, only the head end or the tail end of the puncture needle is positioned, auxiliary positioning cannot be conducted on the center of the puncture needle at the same time, and the positioning precision is reduced are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, more specifically, particularly relates to a needle placement positioning system and method for puncture surgery. BACKGROUND

[0002] Puncture surgery is a medical procedure that uses a puncture needle and other instruments to penetrate the body cavity, organs or tissues of the human body for the purpose of obtaining tissue samples, withdrawing fluids or injecting drugs. By positioning the puncture needle, it can ensure that the puncture needle avoids important organs, blood vessels and other important structures, thereby avoiding unnecessary damage and complications.

[0003] As in the patent with application number: CN202310968319.2, a puncture surgery needle placement positioning device and system are disclosed, which includes a base; a first drive mechanism fixedly arranged opposite to the base; a connecting piece fixedly connected with the power output end of the first drive mechanism; a second drive mechanism fixedly arranged on the connecting piece; a guide rail, the first end of which is rotatably connected with the base, and the second end of which is fixedly connected with the connecting piece; a bracket, which is slidingly connected with the guide rail, and on which a needle to be punctured is detachably connected; a transmission mechanism, which is connected with the second drive mechanism and the bracket respectively; during adjustment, the base is fixed at a target position, the first drive mechanism and the second drive mechanism enable the bracket to be adjusted in two adjustment dimensions, thereby realizing adjustment of the needle entry angle.

[0004] Based on the above, the puncture needle positioning device currently in use still has the following problems: 1. The bottom of the puncture needle positioning device is flat, and cannot be automatically adjusted according to the puncture position, resulting in poor positioning effect of the puncture needle positioning device when used in uneven areas of the patient, and unable to ensure the contact area with the patient's skin, reducing the positioning effect; 2. Generally, only the head or tail end of the puncture needle is positioned, and the center of the puncture needle cannot be simultaneously assisted in positioning, reducing the positioning accuracy, and the size of the positioning hole cannot be adjusted according to the size of the puncture needle, so the versatility is not high. SUMMARY

[0005] The embodiment of the present disclosure relates to a needle arrangement positioning system and method for puncture surgery, which has a supporting unit, a resetting unit, a positioning unit, a pressing unit and an auxiliary unit; the middle of the positioning ring B also plays a positioning role on the puncture needle, thereby improving the positioning accuracy of the puncture needle; different models of puncture needles can be positioned conveniently, and the universality is high; when the supporting base is located in an uneven area of a patient, the angle of the two rectangular movable plates changes, so that the two rectangular movable plates are in contact with the patient, thereby improving the contact area; the problems that the positioning effect of the puncture needle positioning device is poor when used in the uneven area of the patient, the center of the puncture needle cannot be positioned simultaneously, and the size of the positioning hole cannot be adjusted according to the size of the puncture needle are solved.

[0006] In a first aspect of the present disclosure, a needle arrangement positioning system for puncture surgery is provided, comprising a supporting unit; four sets of resetting units are installed on the top of the supporting unit, and the four sets of resetting units are used for resetting the supporting unit; a positioning unit is installed on the top of the supporting unit, and the positioning unit is used for positioning a puncture needle; two sets of pressing units are installed on the positioning unit, and the two sets of pressing units are used for pressing the supporting unit; an auxiliary unit is installed on the positioning unit, and the auxiliary unit is used for improving the positioning accuracy of the positioning unit.

[0007] In at least some embodiments, the supporting unit comprises a supporting base and a multifunctional handle; a circular hole is formed in the center of the supporting base; the multifunctional handle is threadedly connected to the front side of the supporting base, the multifunctional handle is used for moving the supporting base, and the multifunctional handle is also used for replacing the positioning ring A and the positioning ring B.

[0008] In at least some embodiments, the supporting unit further comprises a rectangular movable plate; two rectangular movable plates are provided, and the two rectangular movable plates are rotatably installed on the left and right ends of the supporting base through a rotating shaft.

[0009] In at least some embodiments, the resetting unit comprises a rectangular flat plate and an arc-shaped resetting shaft; the rectangular flat plate is fixedly installed on the top of the supporting base; the arc-shaped resetting shaft is fixedly installed on the top of the rectangular movable plate, and the arc-shaped resetting shaft is also in sliding connection with the rectangular flat plate.

[0010] In at least some embodiments, the resetting unit further comprises a spiral spring A; the spiral spring A is sleeved outside the arc-shaped resetting shaft, and the spiral spring A is located on the inner side of the rectangular flat plate.

[0011] In at least some embodiments, the positioning unit comprises: mounting supports, circular guide rods, and movable positioning plates; the mounting supports are provided in pairs, and the two mounting supports are mounted on the top of the support base by screws; the circular guide rods are provided in pairs, and the two circular guide rods are fixedly installed on the two mounting supports; the movable positioning plates are slidably installed on the two mounting supports and the two circular guide rods.

[0012] In at least some embodiments, the positioning unit further comprises: positioning rings A and spiral springs B; the positioning ring A is slidably installed on the movable positioning plate, and the positioning ring A is in interference fit with the movable positioning plate; the spiral springs B are provided in pairs, and the two spiral springs B are sleeved outside the two circular guide rods, and the two spiral springs B are located below the movable positioning plate.

[0013] In at least some embodiments, the pressing unit comprises: a movable pressing rod and a spiral spring C; the movable pressing rod is slidably installed on the movable positioning plate, the bottom of the movable pressing rod is provided with a rounded corner, and the movable pressing rod is located directly above the rectangular movable plate; the spiral spring C is sleeved outside the movable pressing rod, and the spiral spring C is located below the movable positioning plate.

[0014] In at least some embodiments, the auxiliary unit comprises: an auxiliary positioning frame and a positioning ring B; the auxiliary positioning frame is slidably installed on the movable positioning plate; the positioning ring B is slidably installed on the auxiliary positioning frame, and the positioning ring B is in interference fit with the auxiliary positioning frame; the positioning ring B is the same size as the positioning ring A, and the positioning ring B is concentrically arranged with the positioning ring A.

[0015] A needle positioning method for puncture surgery: 1. The staff holds the multifunctional handle and places the support base at the puncture site of the patient; 2. The puncture needle is inserted through the positioning ring A and the positioning ring B; 3. The puncture needle is pressed downward, and the puncture needle and the movable positioning plate are slowly moved downward, and the puncture needle is moved to the appropriate position in the patient's body; 4. After the puncture is completed, the puncture needle is pulled out upward, and the puncture needle is separated from the patient; 5. When the positioning ring A and the positioning ring B need to be replaced, the staff first rotates the multifunctional handle counterclockwise to separate the multifunctional handle from the support base; 6. The inner end of the multifunctional handle is inserted into the auxiliary positioning frame, and the multifunctional handle is pushed upward to separate the positioning ring B from the auxiliary positioning frame; then the inner end of the multifunctional handle is inserted into the movable positioning plate, and the multifunctional handle is pushed upward to separate the positioning ring A from the movable positioning plate, and then the positioning ring A and the positioning ring B with appropriate hole diameters are replaced.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention facilitates the staff to place the puncture needle in the positioning ring A, thereby achieving the positioning of the puncture needle; two coil springs B support the movable positioning plate, ensuring that the bottom of the puncture needle does not contact the patient when the puncture needle is placed in the positioning ring A; when the staff presses the puncture needle downward, the movable positioning plate and the puncture needle slowly move downward; In addition, the positioning ring B also plays a positioning role in the middle of the puncture needle, improving the positioning accuracy of the puncture needle; when the bottom of the auxiliary positioning frame contacts the support base, the auxiliary positioning frame stops moving, and the movable positioning plate and the puncture needle can continue to move downward; when the size of the puncture needle is changed, the staff can remove the positioning ring A and the positioning ring B through the multi-function handle, and then replace the positioning ring A and the positioning ring B with appropriate apertures, which is convenient for positioning puncture needles of different models and has strong versatility.

[0017] 2. In the present invention, when the movable positioning plate and the puncture needle move downward, the movable positioning plate can drive the two movable pressing rods to move downward simultaneously; In addition, when the support base is located on a flat area of ​​the patient, the two rectangular movable plates do not change angle, causing the two coil springs C to slowly compress; when the support base is located on an uneven area of ​​the patient, the two rectangular movable plates will change angle, causing the two rectangular movable plates to contact the patient, increasing the contact area, which is beneficial to improving stability during positioning.

[0018] 3. When the support base of the present invention is located on an uneven area of ​​the patient and the movable positioning plate and the puncture needle slowly move downward, the four coil springs A are slowly compressed; when the movable positioning plate and the puncture needle are slowly pulled upward, the two rectangular movable plates are slowly reset under the action of the four coil springs A, so that the two rectangular movable plates are automatically reset to a horizontal state, which is convenient for next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0020] The drawings described below only relate to some embodiments of the present invention, rather than limiting the present invention.

[0021] In the attached figure: Figure 1 Shows a schematic diagram of the three-dimensional structure of the present invention; Figure 2 shows a schematic structural diagram of the support unit of the present invention; Figure 3 The present invention is shown Figure 1 Schematic diagram of the local enlarged structure of area A in the middle; Figure 4 A structure diagram of the positioning unit, pressing unit and auxiliary unit of the present application is shown; Figure 5 A structure diagram of the transverse center cut of the present application is shown; Figure 1 Figure 6 A structure diagram of the longitudinal center cut of the present application is shown; Figure 1 Figure 7 A partial enlarged structure diagram of the B area in the present application is shown; Figure 5 Figure 8 A partial enlarged structure diagram of the C area in the present application is shown. Figure 5

[0022] List of reference signs: 100, support unit; 101, support base; 102, multifunctional handle; 103, rectangular movable plate; 200, reset unit; 201, rectangular flat plate; 202, arc-shaped reset shaft; 203, spiral spring A; 300, positioning unit; 301, mounting bracket; 302, circular guide rod; 303, movable positioning plate; 304, positioning ring A; 305, spiral spring B; 400, pressing unit; 401, movable pressing rod; 402, spiral spring C; 500, auxiliary unit; 501, auxiliary positioning frame; 502, positioning ring B. DETAILED DESCRIPTION

[0023] In order to make the purpose, scheme and advantages of the technical solutions of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the specific embodiments of the present application. Unless otherwise specified, the terms used herein have the meanings commonly used in the art. The same reference signs in the drawings represent the same components.

[0024] Embodiment: Please refer to Figures 1 to 8 The present application provides a needle arrangement positioning system for puncture surgery, which comprises a support unit 100; four sets of reset units 200 are installed on the top of the support unit 100, and the four sets of reset units 200 are used for resetting the support unit 100; a positioning unit 300 is installed on the top of the support unit 100, and the positioning unit 300 is used for positioning a puncture needle; two sets of pressing units 400 are installed on the positioning unit 300, and the two sets of pressing units 400 are used for pressing the support unit 100; an auxiliary unit 500 is installed on the positioning unit 300, and the auxiliary unit 500 is used for improving the positioning accuracy of the positioning unit 300.

[0025] In the embodiments of the present disclosure, as​​​​Figure 4 、 Figure 7 and Figure 8 As shown in FIGS. 9, 10 and 11, the positioning unit 300 comprises two mounting brackets 301, two circular guide rods 302 and a movable positioning plate 303; the two mounting brackets 301 are mounted on the top of the support base 101 by screws; the two circular guide rods 302 are fixedly installed on the two mounting brackets 301; the movable positioning plate 303 is slidingly installed on the two mounting brackets 301 and the two circular guide rods 302; the positioning unit 300 further comprises a positioning ring A 304 and two spiral springs B 305; the positioning ring A 304 is slidingly installed on the movable positioning plate 303 and is in interference fit with the movable positioning plate 303; the two spiral springs B 305 are sleeved outside the two circular guide rods 302 and are located below the movable positioning plate 303; The auxiliary unit 500 comprises an auxiliary positioning frame 501 and a positioning ring B 502; the auxiliary positioning frame 501 is slidingly installed on the movable positioning plate 303; the positioning ring B 502 is slidingly installed on the auxiliary positioning frame 501 and is in interference fit with the auxiliary positioning frame 501; the positioning ring B 502 is the same size as the positioning ring A 304 and is concentrically arranged with the positioning ring A 304; Specifically, since the movable positioning plate 303 is slidingly installed on the two mounting brackets 301 and the two circular guide rods 302, and the positioning ring A 304 is slidingly installed on the movable positioning plate 303 and is in interference fit with the movable positioning plate 303, the staff can place the puncture needle in the positioning ring A 304, so as to realize the positioning of the puncture needle; since the two spiral springs B 305 are sleeved outside the two circular guide rods 302 and are located below the movable positioning plate 303, the movable positioning plate 303 is supported, so as to ensure that the bottom of the puncture needle does not contact the patient when the puncture needle is placed in the positioning ring A 304; when the staff presses the puncture needle downward, the movable positioning plate 303 and the puncture needle move downward slowly; Moreover, since the auxiliary positioning frame 501 is slidingly installed on the movable positioning plate 303, and the positioning ring B 502 is slidingly installed on the auxiliary positioning frame 501, and the positioning ring B 502 is in interference fit with the auxiliary positioning frame 501, the middle part of the puncture needle is also positioned, thereby improving the positioning accuracy of the puncture needle; when the bottom of the auxiliary positioning frame 501 is in contact with the support base 101, the auxiliary positioning frame 501 stops moving, and the movable positioning plate 303 and the puncture needle can continue to move downward; and since the multifunctional handle 102 is threadedly connected to the front side of the support base 101, when the size of the puncture needle is replaced, the worker can remove the positioning ring A 304 and the positioning ring B 502 through the multifunctional handle 102, and then replace the positioning ring A 304 and the positioning ring B 502 with a suitable aperture, so as to facilitate positioning of puncture needles of different models, and the versatility is high.

[0026] In the embodiments of the present disclosure, as shown in Figure 2 and Figure 4 , the support unit 100 comprises a support base 101 and a multifunctional handle 102; the center of the support base 101 is provided with a circular hole; the multifunctional handle 102 is threadedly connected to the front side of the support base 101, and the multifunctional handle 102 is used to move the support base 101, and the multifunctional handle 102 is also used to replace the positioning ring A 304 and the positioning ring B 502; the support unit 100 further comprises a rectangular movable plate 103; the rectangular movable plate 103 is provided with two, and the two rectangular movable plates 103 are rotatably installed on the left and right ends of the support base 101 through a rotating shaft; The pressing unit 400 comprises a movable pressing rod 401 and a spiral spring C 402; the movable pressing rod 401 is slidingly installed on the movable positioning plate 303, and the bottom of the movable pressing rod 401 is provided with a rounded corner, and the movable pressing rod 401 is located directly above the rectangular movable plate 103; the spiral spring C 402 is sleeved outside the movable pressing rod 401, and the spiral spring C 402 is located below the movable positioning plate 303; The specific action is that since the two movable pressing rods 401 are slidingly installed on the movable positioning plate 303, and the two spiral springs C 402 are sleeved outside the two movable pressing rods 401, and the two spiral springs C 402 are located below the movable positioning plate 303, when the movable positioning plate 303 and the puncture needle move downward, the movable positioning plate 303 can drive the two movable pressing rods 401 to move downward at the same time; In addition, since the two rectangular movable plates 103 are rotatably installed at the left and right ends of the support base 101 through the rotating shafts, and the two movable pressing rods 401 are located directly above the two rectangular movable plates 103, when the support base 101 is located at the flat area of the patient, the two rectangular movable plates 103 do not change the angle, so that the two spiral springs C402 are slowly compressed; since the elastic force of the spiral spring C402 is greater than the elastic force of the two spiral springs A203, when the support base 101 is located at the uneven area of the patient, the two rectangular movable plates 103 change the angle, so that the two rectangular movable plates 103 are in contact with the patient, the contact area is increased, and the stability during positioning is improved.

[0027] In the embodiments of the present disclosure, as shown in Figure 3 The reset unit 200 includes a rectangular flat plate 201 and an arc-shaped reset shaft 202; the rectangular flat plate 201 is fixedly installed at the top of the support base 101; the arc-shaped reset shaft 202 is fixedly installed at the top of the rectangular movable plate 103, and the arc-shaped reset shaft 202 is also in sliding connection with the rectangular flat plate 201; the reset unit 200 further includes a spiral spring A203; the spiral spring A203 is sleeved outside the arc-shaped reset shaft 202, and the spiral spring A203 is located at the inner side of the rectangular flat plate 201. The specific action is that: since the four arc-shaped reset shafts 202 are fixedly installed at the top of the two rectangular movable plates 103, and the four arc-shaped reset shafts 202 are also in sliding connection with the four rectangular flat plates 201, and the four spiral springs A203 are located at the inner sides of the four rectangular flat plates 201, when the support base 101 is located at the uneven area of the patient, and the movable positioning plate 303 and the puncture needle slowly move downward, the four spiral springs A203 are slowly compressed; when the movable positioning plate 303 and the puncture needle slowly pull out upward, the two rectangular movable plates 103 slowly reset under the action of the four spiral springs A203, so that the two rectangular movable plates 103 automatically reset to the horizontal state, and the next use is facilitated.

[0028] A needle arrangement positioning method for puncture surgery 1) The staff holds the multifunctional handle 102, and places the support base 101 at the puncture position of the patient; 2) The puncture needle passes through the positioning ring A304 and the positioning ring B502; 3) The puncture needle is pressed downward, so that the puncture needle and the movable positioning plate 303 slowly move downward, and the puncture needle moves to the appropriate position in the patient's body; 4) After the puncture is completed, the puncture needle is pulled out upward, so that the puncture needle is separated from the patient; 5) When the positioning ring A304 and the positioning ring B502 need to be replaced, the staff first rotates the multifunctional handle 102 counterclockwise, so that the multifunctional handle 102 is separated from the support base 101; 6) Insert the inner end of the multifunction handle 102 into the auxiliary positioning frame 501, and then push the multifunction handle 102 upward to separate the positioning ring B 502 from the auxiliary positioning frame 501; then insert the inner end of the multifunction handle 102 into the movable positioning plate 303, and then push the multifunction handle 102 upward to separate the positioning ring A 304 from the movable positioning plate 303, and then replace the positioning ring A 304 and the positioning ring B 502 with appropriate diameters.

[0029] The specific use and role of the embodiment are as follows: When the application is used, first, the staff holds the multifunctional handle 102, and places the supporting base 101 at the puncture of the patient; the puncture needle is passed through the positioning ring A 304 and the positioning ring B 502, so that the positioning of the puncture needle is realized, the middle part of the puncture needle is also positioned, and the positioning precision of the puncture needle is improved; the two spiral springs B 305 support the movable positioning plate 303, so that when the puncture needle is placed in the positioning ring A 304, the bottom of the puncture needle does not contact the patient; when the staff presses the puncture needle downward, the movable positioning plate 303 and the puncture needle slowly move downward, when the bottom of the auxiliary positioning frame 501 contacts the supporting base 101, the auxiliary positioning frame 501 stops moving, and the movable positioning plate 303 and the puncture needle can continue to move downward; when the movable positioning plate 303 and the puncture needle move downward, the movable positioning plate 303 can drive the two movable pressing rods 401 to move downward at the same time; when the supporting base 101 is located in the flat area of the patient, the two rectangular movable plates 103 do not change the angle, so that the two spiral springs C 402 are slowly compressed; when the supporting base 101 is located in the uneven area of the patient, the two rectangular movable plates 103 change the angle, so that the two rectangular movable plates 103 contact the patient, the contact area is improved, the stability during positioning is improved, the puncture needle is moved to the appropriate position in the patient's body, and waiting; after the puncture is completed, the puncture needle is pulled out upward, so that the puncture needle is separated from the patient; when the movable positioning plate 303 and the puncture needle slowly pull out upward, the two rectangular movable plates 103 are slowly reset under the action of the four spiral springs A 203, so that the two rectangular movable plates 103 are automatically reset to the horizontal state, and the next use is facilitated; when the positioning ring A 304 and the positioning ring B 502 need to be replaced, the staff first rotates the multifunctional handle 102 counterclockwise, so that the multifunctional handle 102 is separated from the supporting base 101; the inner end of the multifunctional handle 102 is inserted into the circular hole on the auxiliary positioning frame 501, so that the multifunctional handle 102 is below the positioning ring B 502, the multifunctional handle 102 is pushed upward again, so that the positioning ring B 502 is separated from the auxiliary positioning frame 501; then the inner end of the multifunctional handle 102 is inserted into the circular hole on the movable positioning plate 303, so that the multifunctional handle 102 is below the positioning ring A 304, the multifunctional handle 102 is pushed upward again, so that the positioning ring A 304 is separated from the movable positioning plate 303, and then the positioning ring A 304 and the positioning ring B 502 with appropriate hole diameters are replaced.

[0030] In this document, the following points need to be noted: 1. The drawings of the disclosed embodiments only relate to the structures involved in the disclosed embodiments, and other structures can refer to the general design.

[0031] 2. In the case of no conflict, the embodiments and the features in the embodiments of the disclosure can be combined with each other to obtain new embodiments.

[0032] The above merely provides the specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A needle positioning system for puncture surgery, comprising a support unit (100); characterized in that: Four groups of reset units (200) are installed on the top of the support unit (100), and the four groups of reset units (200) are used to reset the support unit (100); a positioning unit (300) is installed on the top of the support unit (100), and the positioning unit (300) is used to position the puncture needle; two groups of pressing units (400) are installed on the positioning unit (300), and the two groups of pressing units (400) are used to press the support unit (100); an auxiliary unit (500) is installed on the positioning unit (300), and the auxiliary unit (500) is used to improve the positioning accuracy of the positioning unit (300); The positioning unit (300) comprises: a movable positioning plate (303) and a positioning ring A (304); the positioning ring A (304) is slidably mounted on the movable positioning plate (303), and the positioning ring A (304) and the movable positioning plate (303) are interference-fitted; The auxiliary unit (500) comprises an auxiliary positioning frame (501) and a positioning ring B (502); the positioning ring B (502) is slidably mounted on the auxiliary positioning frame (501), and the positioning ring B (502) and the auxiliary positioning frame (501) are interference-fitted.

2. The needle positioning system for puncture surgery according to claim 1, characterized in that: The support unit (100) comprises: a support base (101) and a multifunctional handle (102); a circular hole is provided at the center of the support base (101); the multifunctional handle (102) is threadedly connected to the front side of the support base (101); the multifunctional handle (102) is used to move the support base (101), and the multifunctional handle (102) is also used to replace the positioning ring A (304) and the positioning ring B (502).

3. The needle positioning system for puncture surgery according to claim 2, characterized in that: The support unit (100) further comprises: a rectangular movable plate (103); two rectangular movable plates (103) are provided, and the two rectangular movable plates (103) are rotatably mounted on the left and right ends of the support base (101) via a rotating shaft.

4. The needle positioning system for puncture surgery according to claim 3, characterized in that: The reset unit (200) comprises: a rectangular flat plate (201) and an arc-shaped reset shaft (202); the rectangular flat plate (201) is fixedly mounted on the top of the support base (101); the arc-shaped reset shaft (202) is fixedly mounted on the top of the rectangular movable plate (103), and the arc-shaped reset shaft (202) is also slidably connected to the rectangular flat plate (201).

5. The needle positioning system for puncture surgery according to claim 4, characterized in that: The reset unit (200) further comprises: a coil spring A (203); the coil spring A (203) is sleeved on the outside of the arc-shaped reset shaft (202), and the coil spring A (203) is located on the inner side of the rectangular flat plate (201).

6. The needle positioning system for puncture surgery according to claim 3, characterized in that: The positioning unit (300) further comprises: a mounting bracket (301) and a circular guide rod (302); two mounting brackets (301) are provided, and the two mounting brackets (301) are mounted on the top of the support base (101) by screws; two circular guide rods (302) are provided, and the two circular guide rods (302) are fixedly mounted on the two mounting brackets (301); and the movable positioning plate (303) is slidably mounted on the two mounting brackets (301) and the two circular guide rods (302).

7. The needle positioning system for puncture surgery according to claim 6, characterized in that: The positioning unit (300) further includes: a coil spring B (305); there are two coil springs B (305), and the two coil springs B (305) are sleeved outside the two circular guide rods (302), and the two coil springs B (305) are located below the movable positioning plate (303).

8. The needle positioning system for puncture surgery according to claim 6, characterized in that: The pressing unit (400) comprises: a movable pressing rod (401) and a coil spring C (402); the movable pressing rod (401) is slidably mounted on the movable positioning plate (303), and the bottom of the movable pressing rod (401) is provided with a rounded corner, and the movable pressing rod (401) is located directly above the rectangular movable plate (103); the coil spring C (402) is sleeved on the outside of the movable pressing rod (401), and the coil spring C (402) is located below the movable positioning plate (303).

9. The needle positioning system for puncture surgery according to claim 7, characterized in that: The auxiliary positioning frame (501) is slidably mounted on the movable positioning plate (303); the positioning ring B (502) is the same size as the positioning ring A (304), and the positioning ring B (502) and the positioning ring A (304) are concentrically arranged.

10. A method for positioning a needle for puncture surgery, characterized in that: The needle positioning system for puncture surgery as claimed in claim 9 comprises the following steps: 1) The staff member holds the multifunctional handle (102) and places the support base (101) on the puncture site of the patient; 2) Passing the puncture needle through the positioning ring A (304) and the positioning ring B (502); 3) Press the puncture needle downwards to slowly move the puncture needle and the movable positioning plate (303) downwards, and wait for the puncture needle to move to a suitable position in the patient's body; 4) After the puncture is completed, pull the puncture needle upward to separate it from the patient; 5) When the positioning ring A (304) and the positioning ring B (502) need to be replaced, the staff first rotates the multifunctional handle (102) counterclockwise to separate the multifunctional handle (102) from the support base (101); 6) Insert the inner end of the multifunctional handle (102) into the auxiliary positioning frame (501), and then push the multifunctional handle (102) upward to separate the positioning ring B (502) from the auxiliary positioning frame (501); then insert the inner end of the multifunctional handle (102) into the movable positioning plate (303), and then push the multifunctional handle (102) upward to separate the positioning ring A (304) from the movable positioning plate (303), and then replace the positioning ring A (304) and the positioning ring B (502) with suitable apertures.

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