Ultrasonic guidance nonmetal puncture needle

Abstract

The ultrasonic guidance nonmetal puncture needle comprises a needle handle and a needle body, and the needle body comprises an outer needle and an inner needle; the front section of the outer needle is provided with an ultrasonic identification area; an air bag is arranged between the outer needle and the inner needle; the air bags are communicated through a pipeline; the outer needle and the inner needle are made of non-metal materials. According to the puncture needle, a clear puncture path is displayed on an ultrasonic image, and meanwhile, the depth of puncturing into a focus area can be accurately judged; in the drainage, sampling or medicine injection process, the operation stability is improved, and slippage is prevented; a large-angle arc-shaped needle inserting path is adopted, a puncture path is marked through development of different acoustic impedances on an ultrasonic image, and the device adapts to a complex anatomical structure, bypasses blood vessels and key structures of a human body and accurately reaches a focus.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an ultrasound-guided non-metallic puncture needle. Background Art

[0002] Ultrasound-guided puncture is a minimally invasive diagnostic and treatment technology performed under ultrasound imaging monitoring. The puncture needle is an interventional operation tool widely used in medicine, which is suitable for fluid aspiration, tumor tissue biopsy and precision drug injection.

[0003] Existing puncture needles are usually straight needles, and their needle insertion route is a straight line. During the puncture process, when facing a lesion located behind an important anatomical structure, or when the lesion is blocked by an important structure, it is easy to be restricted by the important anatomical structure, resulting in the puncture path of the needle body in the tissue being blocked and unable to reach the target lesion location. After entering the target area, the puncture needle cannot accurately judge the depth of the lesion area. At the same time, after the puncture needle reaches the target area, the needle body will be affected by the patient's own breathing action, the reaction force of the surrounding tissues of the body, and the pulling force formed by unreasonable external actions, resulting in the instability of the needle body and slipping out of the target area, thereby resulting in inaccurate drainage and biopsy positions, and the therapeutic effect of the injected drug is reduced, so that a second needle insertion operation is required. Summary of the invention

[0004] The present invention provides a non-metallic puncture needle which can accurately determine the depth of the puncture into the lesion area according to the relative distance after entering the lesion area; prevent the puncture needle from slipping during drainage, sampling or drug injection, and improve the operation stability; has a large-angle arc needle insertion path, and the puncture path is marked by the development of different acoustic impedances on the ultrasound image, adapts to complex anatomical structures, bypasses blood vessels and key structures of the human body, and accurately reaches the lesion.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] The technical solution is an ultrasound-guided non-metallic puncture needle, comprising a needle handle and a needle body, wherein the needle body comprises an outer needle and an inner needle; an ultrasonic identification area is provided at the front section of the outer needle; an airbag is provided between the outer needle and the inner needle; the airbag is connected to a gas input system through a pipeline; and the outer needle and the inner needle are made of non-metallic materials.

[0007] As an optimization, the inner needle and the outer needle include a front section, a middle section and a rear section; the front section, the middle section and the rear section of the inner needle are evenly spaced with the airbags.

[0008] As an optimization, the airbag is between the outer needle and the inner needle and is in a semicircular shape.

[0009] As an optimization, the airbag entirely surrounds between the outer needle and the inner needle.

[0010] As an optimization, a groove is provided on the contact surface between the inner needle and the airbag; and the inner side of the airbag is thickened.

[0011] As an optimization, the needle body is bent by 15°-30°.

[0012] As an optimization, the outer needle and the inner needle are bent; an arc-shaped bending portion is provided on the outer needle, and a pre-bending indentation portion is provided on the inner needle opposite to the arc-shaped bending portion; a metal wire is built into the arc-shaped bending portion and the pre-bending indentation portion; the arc-shaped bending portion and the pre-bending indentation portion are arranged between adjacent airbags.

[0013] As an optimization, a liquid channel is provided in an annular shape along the side wall of the inner needle; the opening of the liquid channel is inclined downward.

[0014] The beneficial technical effects of the present invention are:

[0015] The metal structures of the ultrasonic detection area, the airbag, the pre-bending part and the pre-bending indentation part present different development effects on the ultrasonic image relative to the different acoustic impedances of the liquid and tissue in the human body. The differences are obvious on the ultrasonic image, thereby forming a continuous development track, accurately judging the insertion path of the puncture needle, providing a clear visual reference standard for the positioning and guidance of the puncture needle during surgery, and further improving the accuracy and safety of the operation; when the puncture needle tip reaches the lesion area and is inserted, the depth of the puncture needle penetrating the lesion area is judged according to the fixed distance position between the ultrasonic identification area and the airbag, thereby improving the accuracy of operations such as drainage, sampling or drug injection in the lesion area.

[0016] The airbag surrounds the outer needle and the inner needle. When the puncture needle is inserted into the lesion area and reaches a certain depth, the airbag is controlled to expand outward, so that the front, middle and rear sections of the outer needle are elastically deformed radially outward within the area of ​​​​the expansion of the airbag, forming support and stability, ensuring the overall stability of the puncture needle during operations such as drainage, sampling or injection of drugs in the lesion area; preventing the puncture needle from slipping due to tension caused by the patient's breathing or external unreasonable movements during the operation.

[0017] For the one-stage bent puncture needle and the two-stage bent puncture needle, the needle insertion path during the puncture process is a large-angle arc, which is beneficial for the puncture needle to avoid blood vessels and key structures of the human body and accurately enter multiple chamber structures or complex areas for drainage, sampling or drug injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention in a straight needle state.

[0020] Figure 2 It is a schematic cross-sectional view of the present invention in a straight needle state.

[0021] Figure 3 It is a schematic diagram of the main structure of the present invention in an unbent state.

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the present invention in a bent state; wherein the front section of the needle body is bent at 15°.

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the present invention in a bent state; wherein the needle body is bent in two sections, each section is bent by 15°, and the two sections are bent by 30° in total.

[0024] Figure 6 yes Figure 1 Schematic diagram of the structure in the middle A direction; wherein the airbag is between the outer needle and the inner needle and is semicircular in shape.

[0025] Figure 7 yes Figure 3 Schematic diagram of the structure in the middle A direction; wherein the airbag is between the outer needle and the inner needle and is in an arc shape.

[0026] Reference numerals:

[0027] Needle handle 1, outer needle 2, inner needle 3, air bag 4, arc-shaped bending part 5, pre-bending indentation part 6, liquid channel 7, inner needle connector 8, air bag connector 9, ultrasonic identification area 10;

[0028] The front section 201 of the outer needle, the middle section 202 of the outer needle, and the rear section 203 of the outer needle. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] Embodiment 1, as Figure 1 and Figure 2As shown in the figure, the present invention is an ultrasound-guided non-metallic puncture needle, comprising a needle handle 1 and a needle body, wherein the needle body comprises an outer needle 2 and an inner needle 3; an ultrasonic identification area 10 is provided at the front section of the outer needle 2, and the ultrasonic identification area 10 is close to the position of the needle tip, and the distance is determined according to clinical use; the outer needle 2 and the inner needle 3 are made of non-metallic material, and polyurethane (PU) or liquid crystal polymer (LCP) is selected; an airbag 4 is provided between the outer needle 2 and the inner needle 3, and a certain distance is spaced between the airbag 4 and the ultrasonic identification area 10; the airbag 4 is connected through a pipeline, and the airbag 4 is connected to an external gas input system through a pipeline and an airbag connector 9, and the gas input system comprises an air pump, an electromagnetic valve and a control system, and carbon dioxide gas is introduced into the airbag 4.

[0032] The application of this ultrasound-guided non-metallic puncture needle in obstetrics and gynecology is suitable for pelvic fluid drainage, ovarian cyst puncture drainage and intrauterine lesion treatment, especially in the drainage and sampling of deep lesions. During the operation, the patient's body position is usually supine with a full bladder, which is conducive to clearly displaying the pelvic structure. Determine the specific location of the target tissue (such as a mass or fluid accumulation). Under real-time ultrasound guidance and monitoring, the puncture needle body is gradually inserted into the center of the lesion area. The medical staff controls the air pump through the control system to pass a certain amount of carbon dioxide gas into the airbag 4. The airbag 4 expands rapidly between the inner wall of the outer needle 2 and the inner wall of the inner needle 3, filling the space between the outer needle 2 and the inner needle 3. The solenoid valve controls the inflation and deflation of carbon dioxide in the airbag 4.

[0033] During the operation, the balloon 4 is always inflated. The ultrasonic identification area 10 on the puncture needle is a notch, groove or special coating, which is used for the strong reflection effect of ultrasonic waves under ultrasound to locate the needle tip of the puncture needle; the ultrasonic identification area 10 has an acoustic impedance between 40-60 MRayl, and the ultrasonic identification area 10 forms a high echo under ultrasound, and appears as a highlighted point in the ultrasound image. The outer needle 2 and the inner needle 3 are made of non-metallic materials, and their acoustic impedance is close to that of human soft tissue. Ultrasonic waves can pass through the outer needle 2 and the inner needle 3 without being affected by significant reflection. They appear as low echo (dark gray) to medium echo area (gray) under ultrasound, and will not form a strong highlight area to cover the display of the balloon 4. Carbon dioxide is introduced into the balloon, and the acoustic impedance of the gas is very low (about 0.0005 MRayl), which is much lower than the acoustic impedance of liquids and tissues in the human body. Ultrasonic waves produce strong reflections at the boundary of the balloon 4. On the ultrasound image, the balloon 4 appears as a high-brightness boundary, and the inside of the balloon 4 appears as an echo-free area (dark area). The ultrasound identification area 10 and the airbag 4 form a contrast in the ultrasound image.

[0034] Under ultrasound, the position of the needle tip on the needle body is determined by the ultrasonic identification area 10. On this basis, the needle insertion path is determined according to the relatively fixed distance position set between the ultrasonic identification area 10 and the airbag 4. When the puncture needle tip is inserted into the lesion area, the depth of the puncture needle penetrating the lesion area is determined to improve the accuracy of the operation.

[0035] In the ultrasound identification area 10, three equally spaced carbon dioxide balloons form different and continuous imaging tracks on the ultrasound image, providing a clear visual reference standard for positioning and guiding the puncture needle during surgery, further improving the accuracy and safety of the operation. Figure 6 As shown in FIG. 1 , the airbag 4 is arranged in a semicircular arc shape between the outer needle 2 and the inner needle 3. The semicircular arc structure can form an arc-shaped imaging on the ultrasound image.

[0036] The airbag 4 surrounds the outer needle 2 and the inner needle 3 as a whole. The front section, middle section and rear section of the inner needle 3 are evenly spaced with airbags 4, and the airbags 4 are arranged between the outer needle 2 and the inner needle 3. When the puncture needle body is inserted into the lesion area and it is determined that the determined depth has been reached, carbon dioxide gas is continuously introduced into the airbag 4, and the airbag 4 expands outward, so that the outer needle 2 is elastically deformed radially outward within the area where the airbag 4 expands, forming a bulge. The three airbags 4 elastically deform the front section, middle section and rear section of the outer needle 2, forming support and stability during the medical operation, ensuring the overall stability of the puncture needle, and preventing the puncture needle from slipping out of the lesion area due to the pulling force formed by the patient's breathing or external unreasonable actions during the operation, and requiring a secondary puncture. After the airbag 4 forms a three-point fixation on the needle body, the inner needle 3 and the inner needle connector 8 are connected to the drainage device to aspirate and drain the cystic fluid in the pelvic cyst, or to puncture and sample the tumor lesion tissue to obtain a tissue sample.

[0037] After completing the medical operation of drainage or sampling, the air pump is used to slowly discharge the carbon dioxide gas in the airbag 4 through the control system, and the airbag 4 and the outer needle 2 return to their original shapes. Then the puncture needle is slowly withdrawn while being kept stable to prevent damage to human tissue. After the puncture needle is withdrawn, the medical staff compresses the needle hole to stop bleeding or uses a sterile dressing. After the needle is withdrawn, the medical staff will continue to observe whether the patient will have complications, such as bleeding, infection, or increased pain. After puncturing near important organs, the doctor will review the puncture path again through imaging to check that there is no abnormality or bleeding. This puncture needle achieves high-precision puncture drainage or sampling, especially in complex pelvic structures, and the stability of the operation is greatly improved by airbag fixation.

[0038] The outer needle 2 is made of polyurethane (PU), and the inner needle 3 is made of liquid crystal polymer (LCP). The outer needle made of polyurethane has good elasticity, maintains structural integrity when expanded under pressure, and returns to its original state after the pressure is released. In order to prevent the displacement and asymmetric expansion of the airbag 4 between the outer needle 2 and the inner needle 3, the contact surface between the airbag 4 and the outer diameter of the inner needle 3 is thickened, and a groove or an isolation sheath is provided on the contact surface between the inner needle 3 and the airbag 4. The groove or isolation sheath can protect the inner needle from the expansion and extrusion of the airbag, so that the airbag expands outward to squeeze the outer needle. The inner needle of liquid crystal polymer has good strength and hardness, is more resistant to extrusion, and is not easy to deform during the process of the airbag 4 expanding and deforming to squeeze the inner needle. The size of the outer needle and the inner needle, the size of the airbag and the filling pressure, the expansion pressure, the selection of thick puncture needles and thin puncture needles are adjusted according to the different use scenarios of the puncture needle facing different human tissues or organs.

[0039] The puncture needle can also be used to inject drugs directly into the lesion area for local treatment. For example, using sclerosing agents to treat cysts or injecting chemotherapy drugs directly into tumors, the drug injection reaches the lesion accurately, maximizes the drug effect and reduces the impact on surrounding tissues.

[0040] A liquid channel 7 is provided in an annular manner along the side wall of the inner needle 3; the opening of the liquid channel 7 is inclined downward. When the puncture needle is used for drainage, the drainage speed of the cystic fluid can be increased.

[0041] On the basis of the above, the airbag 4 can also be connected to the pre-filling system through the pipeline and the airbag connector 9, and the pre-filling system introduces microbubble liquid into the airbag 4. The acoustic impedance of the microbubble liquid is obviously different from that of the liquid and tissue of the human body, and a clear development effect is presented in the ultrasound imaging. At the same time, continuously introducing microbubble liquid into the airbag 4 can also support the expansion of the airbag 4, so that the outer needle is elastically deformed, forming a stable support and fixation on the puncture needle body, ensuring the stability of drainage, sampling or injection of drugs after puncture.

[0042] Embodiment 2, as Figure 3 As shown in, an ultrasound-guided non-metallic puncture needle, an ultrasound-guided non-metallic puncture needle, comprises a needle handle 1 and a needle body, the needle body comprises an outer needle 2 and an inner needle 3; the front section of the needle tip on the outer needle 2 is provided with an ultrasound identification area 10; the front section, middle section and rear section of the outer needle 2 and the inner needle 3 are evenly spaced with airbags 4, and the airbags 4 are spaced a certain distance from the ultrasound identification area 10;

[0043] like Figure 4 As shown in the figure, the needle body is bent at a section with a bending angle of 15°; an arc-shaped bending portion 5 is provided at the junction of the front section 201 and the middle section 202 of the outer needle 2, and a pre-bending indentation portion 6 is provided at the junction of the front section and the middle section of the inner needle 3; the arc-shaped bending portion 5 and the pre-bending indentation portion 6 are provided between adjacent airbags 4. Figure 7As shown in the figure, the airbag 4 is entirely surrounded between the outer needle 2 and the inner needle 3. The airbag 4 is connected through a pipeline, and the airbag 4 is connected to an external gas input system through the pipeline and the airbag connector 9. The gas input system includes an air pump, a solenoid valve and a control system, and carbon dioxide gas is introduced into the airbag 4.

[0044] For deep lesions and lesions near important organs, the bending needle is an arc-shaped needle insertion, which can help doctors reach the target area. The doctor makes fine adjustments according to the needs of the operation. During the bending process, a certain force is applied to the arc-shaped bending portion 5 of the outer needle 2 through a handheld tool (such as pliers). The built-in metal wire of the arc-shaped bending portion 5 assists in bending the outer needle 2. At the same time, the metal wire in the pre-bending indentation 6 on the inner needle 3 ensures that the bending of the inner needle is consistent with the bending of the outer needle. The front sections of the outer needle 2 and the inner needle 3 are bent 15° relative to the needle body section and the rear section. The front sections of the outer needle 2 and the inner needle 3 are bent. Medical staff can manually bend them according to the situation of the lesion area, or they can choose to use a puncture needle with the front section of the outer needle 2 fixed at 15° during production. Ultrasound imaging guidance is used to determine the location of the lesion and the needle insertion path through transabdominal or transvaginal ultrasound. According to the location of the lesion, the insertion point with the appropriate angle is selected. The insertion path of a 15° bent puncture needle is an arc, bypassing blood vessels and organs to point the needle tip to the target lesion area and puncture it, so as to perform safe and effective surgical operations. Compared with straight puncture needles, bent puncture needles are more conducive to doctors controlling the puncture direction and angle, thereby achieving precise needle insertion in complex physiological structures.

[0045] Insert the puncture needle. Under the real-time ultrasound guidance and monitoring, the puncture needle is gradually inserted into the center of the lesion area. The medical staff controls the air pump through the control system to pass a certain amount of carbon dioxide gas into the airbag 4. The airbag 4 expands rapidly between the inner wall of the outer needle 2 and the inner wall of the inner needle 3, filling the space between the outer needle 2 and the inner needle 3. The solenoid valve controls the inflation and deflation of carbon dioxide in the airbag 4.

[0046] During the operation, the balloon 4 is always inflated. The ultrasonic identification area 10 on the puncture needle is a notch, groove or special coating, which is used for the strong reflection effect of ultrasonic waves under ultrasound to locate the needle tip of the puncture needle; the ultrasonic identification area 10 has an acoustic impedance between 40-60 MRayl, and the ultrasonic identification area 10 forms a high echo under ultrasound, showing a bright point on the ultrasound image. The outer needle 2 and the inner needle 3 are made of non-metallic materials, and their acoustic impedance is close to that of human soft tissue. Ultrasonic waves can pass through the outer needle 2 and the inner needle 3 without being affected by significant reflection. They are displayed as low echo (dark gray) to medium echo area (gray) under ultrasound, and will not form a strong highlight area to cover the display of the balloon 4. Carbon dioxide is introduced into the balloon, and the acoustic impedance of the gas is very low (about 0.0005 MRayl), which is much lower than that of liquid or human tissue. Ultrasonic waves produce strong reflections at the boundary of the balloon. On the ultrasound image, the balloon is displayed as a high-brightness boundary, and the inside of the balloon is displayed as an echo-free area (dark area).

[0047] Under ultrasound, the position of the needle tip on the needle body is determined by the ultrasonic identification area 10. On this basis, the needle insertion path is determined according to the relatively fixed distance position set between the ultrasonic identification area 10 and the airbag 4. When the puncture needle tip is inserted into the lesion area, the depth of the puncture needle penetrating the lesion area is determined to improve the accuracy of the operation.

[0048] The ultrasound identification area 10 appears as a bright point on the ultrasound image. Three equally spaced carbon dioxide balloons appear as bright boundaries on the ultrasound image, while the interior of the balloons appears as an echo-free area (dark area). The metal wire built into the pre-bend portion 5 and the metal wire built into the pre-bend indentation portion 6 appear as brighter areas with a brightness lower than that of pure metal on the ultrasound image. The pre-bend portion 5 and the pre-bend indentation portion 6 are placed between adjacent balloons. In this way, a continuous development track with different development effects is formed on the ultrasound image, providing a clear visual reference standard for positioning and guiding the puncture needle during surgery, further improving the accuracy and safety of the operation.

[0049] like Figure 7 As shown in , the airbag 4 surrounds the outer needle 2 and the inner needle 3 as a whole. The front section, middle section and rear section of the inner needle 3 are evenly spaced with airbags 4, and the airbags 4 are arranged between the outer needle 2 and the inner needle 3. When the puncture needle body is inserted into the lesion area and reaches a certain depth, carbon dioxide gas is continuously introduced into the airbag 4, and the airbag 4 expands outward, so that the outer needle 2 is elastically deformed radially outward within the area of ​​the bulging airbag 4 to form a bulge. The three airbags 4 elastically deform the front section, middle section and rear section of the outer needle 2, forming support and stability during the operation, ensuring the overall stability of the puncture needle, and preventing the puncture needle from slipping out of the lesion area due to the pulling force formed by the patient's breathing or external unreasonable actions during the operation, and requiring a secondary puncture. After the airbag 4 forms a three-point fixation on the needle body, the inner needle 3 and the inner needle connector 8 are connected to the drainage device to aspirate and drain the cystic fluid in the pelvic cyst, or to puncture and sample the tumor lesion tissue to obtain a tissue sample.

[0050] After completing the predetermined operation, the air pump is used to slowly discharge the carbon dioxide gas in the airbag 4 through the control system, and the airbag 4 and the outer needle 2 return to their original shapes. Then the puncture needle is slowly withdrawn while being kept stable to prevent damage to human tissue. After the puncture needle is withdrawn, the medical staff compresses the needle hole to stop bleeding or uses a sterile dressing. After the needle is withdrawn, the medical staff will continue to observe whether the patient will have complications, such as bleeding, infection, or increased pain. After puncturing near important organs, the doctor will review the puncture path again through imaging to check that there is no abnormality or bleeding. High-precision puncture and drainage are achieved, especially in complex pelvic structures, and the stability of the operation is greatly improved by airbag fixation.

[0051] The insertion depth of the needle into the lesion tumor area is accurately determined to inject drugs directly into the lesion area for local treatment. For example, using sclerosing agents to treat cysts or injecting chemotherapy drugs directly into the tumor, the drug injection reaches the lesion accurately, maximizing the efficacy and reducing the impact on surrounding tissues.

[0052] The puncture needle with a 15° bend at the front of the needle body is suitable for: ovarian cysts that require cyst fluid aspiration or cyst sclerosis treatment; especially deep cysts located near other organs or blood vessels. The 15° bend needle can avoid other organs and blood vessels and accurately reach the cyst site.

[0053] Uterine fibroids, large uterine fibroids or deep fibroids. When performing intrafibroid injection therapy (such as drug or chemical injection), a curved puncture needle can accurately reach the interior of the fibroid.

[0054] Cervical cysts are deep cysts in the cervix. Cyst aspiration is performed under ultrasound guidance, and a curved needle is used to avoid the complex structures around the cervix.

[0055] Endometrial lesions, deep endometriosis. A curved needle is used to obtain a biopsy of the lesion to help with diagnosis or drug injection.

[0056] On the basis of the above, if Figure 5 As shown in the figure, the needle body is bent into two sections, and an arc-shaped bending portion 5 is provided at the joints of the front section 201 and the middle section 202, and the middle section 202 and the rear section 203 of the outer needle 2; a pre-bending indentation portion 6 is provided at the joints of the front section and the towel section, and the middle section and the rear section of the inner needle 3. The front section 201 of the outer needle 2 is bent 15° relative to the middle section 202, and the middle section 202 is bent 15° relative to the rear section 203, and the overall bending angle is 30°. At this time, the puncture needle insertion path is an arc.

[0057] During the operation, a 30° bent puncture needle is selected. The needle insertion path during the puncture process is a large-angle arc, which is more conducive to the puncture needle avoiding key structures of the human body and entering multiple complex chambers. For the puncture of complex pelvic abscesses, multi-chamber or diaphragm-type pelvic abscesses, especially abscesses close to the rectum or other complex pelvic structures. The two bending structures of the needle body adjust the path, avoid key structures of the human body, and accurately enter multiple chambers or complex areas for drainage. Under this structure, the ultrasound identification area 10 appears as a bright point on the ultrasound image. Three equally spaced carbon dioxide balloons are displayed as high-brightness boundaries on the ultrasound image, and the inside of the balloon is displayed as an echo-free area (dark area). The metal wire built into the pre-bend part 5 and the metal wire built into the pre-bend indentation part 6 are displayed as brighter areas lower than the brightness of pure metal on the ultrasound image. The pre-bend part 5 and the pre-bend indentation part 6 are placed between adjacent balloons. In this way, a continuous development track with different development effects is formed on the ultrasound image, providing a clear visual reference standard for the positioning and guidance of the puncture needle during surgery, further improving the accuracy and safety of the operation.

[0058] Puncture for ectopic pregnancy, pelvic or fallopian tube ectopic pregnancy, especially deep and close to important blood vessels. When treating ectopic pregnancy (such as injecting drugs for absorption therapy or aspirating tissue), the secondary or two-section 30° bend of the needle body helps to bypass other organ structures in the pelvic cavity and ensure safe access to the lesion.

[0059] For fetal pleural or abdominal effusion, fetal pleural effusion (fetal pleural effusion) or abdominal effusion (fetal abdominal effusion). During fetal pleural or abdominal puncture and drainage, the secondary or two-stage 30° bend of the needle body can accurately enter the fluid accumulation area without damaging the surrounding fetal organs.

[0060] Puncture for fetal myelomeningocele (spina bifida), fetal myelomeningocele or spina bifida. When performing intracystic fluid extraction or injection treatment for myelomeningocele during the fetal period, the use of a two-section curved needle can accurately reach the lesion site to avoid damage to surrounding nerves and tissues.

[0061] For subplacental bleeding or hematoma. The two bends of the needle body of this puncture needle can enter the lower part of the placenta under ultrasound guidance to perform hematoma suction or injection treatment to prevent further bleeding and complications.

[0062] One-stage curved puncture needle and two-stage curved puncture needle help doctors to puncture more accurately in complex structures, especially when dealing with deep or difficult-to-reach lesions, and can avoid blood vessels and important organs. It has important application value in obstetrics and gynecology and pediatrics.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultrasound-guided non-metallic puncture needle, comprising a needle handle and a needle body, characterized in that: The needle body comprises an outer needle and an inner needle; an ultrasonic identification area is arranged on the outer needle; an air bag is arranged between the outer needle and the inner needle; the air bag is connected with a gas input system through a pipeline; and the outer needle and the inner needle are made of non-metallic materials.

2. The ultrasound-guided non-metallic puncture needle according to claim 1, characterized in that: The inner needle and the outer needle comprise a front section, a middle section and a rear section; the front section, the middle section and the rear section of the inner needle are all evenly spaced with the airbags.

3. The ultrasound-guided non-metallic puncture needle according to claim 1 or 2, characterized in that: The air bag is between the outer needle and the inner needle and is in a semicircular shape.

4. The ultrasound-guided non-metallic puncture needle according to claim 1 or 2, characterized in that: The air bag is entirely surrounded between the outer needle and the inner needle.

5. The ultrasound-guided non-metallic puncture needle according to claim 4, characterized in that: A groove is arranged on the contact surface between the inner needle and the airbag; and the inner side of the airbag is thickened.

6. The ultrasound-guided non-metallic puncture needle according to claim 1 or 2, characterized in that: The needle body is bent by 15°-30°.

7. The ultrasound-guided non-metallic puncture needle according to claim 6, characterized in that: The outer needle and the inner needle are bent; an arc-shaped bending portion is provided on the outer needle, and a pre-bending indentation portion is provided on the inner needle opposite to the arc-shaped bending portion; a metal wire is built into the arc-shaped bending portion and the pre-bending indentation portion; the arc-shaped bending portion and the pre-bending indentation portion are arranged between adjacent airbags.

8. The ultrasound-guided non-metallic puncture needle according to claim 1, characterized in that: A liquid channel is annularly arranged along the side wall of the inner needle; the opening of the liquid channel is inclined downward.

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