Pulmonary nodule locator and locating method thereof

Abstract

The present invention discloses a pulmonary nodule locator and a positioning method thereof, comprising a vertical fixing column clamped to a bed board by a positioning splint, a lesion point positioning mechanism connected to the vertical fixing column for being able to move to any position directly above the human ribs and being able to be positioned directly above the lesion point, and a tilted needle insertion mechanism connected to the lesion point positioning mechanism for making the puncture needle obliquely penetrate into the part between the human ribs and being able to adjust the needle insertion angle. The present invention can calculate the adjustment amount of the needle insertion angle adjustment structure according to the principle of similar triangles, and because the tilted retractable needle insertion pipe and the lesion point are always on the same straight line after adjustment, it can ensure that the inserted puncture needle is accurately penetrated into the lesion, and can be obliquely penetrated from between two human ribs.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically to a pulmonary nodule locator and a locating method thereof. Background Art

[0002] Pulmonary nodules refer to nodules in the lungs with a diameter of less than 30 mm, and it is difficult to determine their nature in the early stages. Pulmonary nodules have a certain probability of being malignant. Early diagnosis is the key to prognosis, and how to distinguish between benign and malignant is one of the difficult problems in clinical diagnosis and treatment. In recent years, with the development of new fiberoptic bronchoscopes, high-resolution CT, and thoracoscopic technology, percutaneous lung biopsy has provided help in clinically distinguishing between benign and malignant lung nodules. Percutaneous lung biopsy is an effective method for diagnosing and treating lung nodules, but how to make the puncture safe, efficient, and convenient requires an advanced tool to complete the operation.

[0003] In order to correctly diagnose the pathology and make the right treatment, it is necessary to use puncture to biopsy the lesion, or to perform targeted treatment through puncture. Usually, the position of the lesion and the skin positioning point and the depth of the puncture needle are determined with the help of instruments such as CT scanning devices. First, the position of the lesion is measured on a certain cross-sectional plane of the human body, and the best needle insertion position and angle are selected on this plane. The precise position of the lesion and the puncture needle is determined by the three-dimensional image of the angle of the needle insertion plane, the needle insertion angle and the needle insertion depth.

[0004] However, the existing puncture guide device has a complex structure and cannot accurately locate the lesion point. It requires multiple puncture attempts, which causes great pain to the patient and has low puncture efficiency. Most puncture guide devices can only achieve vertical puncture in the vertical direction. If the lesion point is located directly below the human ribs, direct vertical puncture will penetrate into the human ribs and will not be able to puncture it, resulting in poor applicability of the device.

[0005] In addition, existing puncture guidance devices are all based on accurate positioning of the CT scanning device before puncturing. However, the CT rapid positioning ruler paper used to ensure accurate positioning of the CT scanning device is directly laid flat on the human chest. When performing a CT scan, the human chest is not a flat horizontal surface, resulting in inaccurate detection results of the CT scanning device. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a lung nodule locator and a positioning method thereof, so as to solve the problem that the existing puncture guiding device cannot accurately locate the lesion point and cannot puncture the lesion point located directly below the human ribs, so as to achieve accurate puncture positioning of the lesion point, to achieve the purpose of puncturing the lesion point directly below the human ribs, and to increase the convenience of puncture adjustment.

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

[0008] The pulmonary nodule locator comprises a vertical fixing column which is clamped to a bed board by a positioning splint, the vertical fixing column is connected with a lesion positioning mechanism which can be moved to any position above the ribs of the human body and can be positioned above the lesion, the lesion positioning mechanism is connected with an inclined needle insertion mechanism which is used to make the puncture needle obliquely penetrate into the area between the ribs of the human body and can adjust the needle insertion angle.

[0009] To further optimize the technical solution, the lesion point positioning mechanism includes an inverted L-shaped rotating rod rotatably set on the top of the vertical fixed column and capable of rotating in the horizontal plane, a telescopic L-shaped round rod telescopically connected to one end of the inverted L-shaped rotating rod through a second positioning adjustment structure, and a rotatable needle insertion vertical bracket vertically rotatably set on the telescopic L-shaped round rod, the bottom end of the rotatable needle insertion vertical bracket is located directly above the lesion point, and the inclined needle insertion mechanism is arranged on the rotatable needle insertion vertical bracket.

[0010] To further optimize the technical solution, the inclined needle insertion mechanism includes a needle insertion angle adjustment structure that is laterally telescopically arranged on a rotatable needle insertion vertical bracket for adjusting the needle insertion angle and allowing the puncture needle to obliquely penetrate the area between the human ribs, and a retractable needle insertion tube that is hingedly arranged at the end of the needle insertion angle adjustment structure for piercing the puncture needle; the rotatable needle insertion vertical bracket, the needle insertion angle adjustment structure, the retractable needle insertion tube and the lesion point are located in the same vertical plane perpendicular to the human ribs.

[0011] To further optimize the technical solution, the side walls of the first telescopic rod and the second telescopic rod are respectively provided with scales for indicating the telescopic length.

[0012] To further optimize the technical solution, the upper and lower side walls of the telescopic needle insertion tube are respectively integrally connected with hinged positioning seats, and the hinged positioning seat and the hinged seat are connected via a hinge shaft.

[0013] To further optimize the technical solution, a horizontal plate located directly above the bed board is positioned in the middle of the vertical fixed column through a first positioning and adjusting structure, and a CT fast positioning ruler paper is horizontally laid on the horizontal plate.

[0014] To further optimize the technical solution, a level is provided on the top end surface of the horizontal plate for detecting whether the horizontal plate is in a horizontal state to ensure the detection accuracy of the CT scanning device.

[0015] The pulmonary nodule localization method is based on a pulmonary nodule locator and includes the following specific steps:

[0016] S1. A patient lies flat on the bed, and the position of the horizontal board is adjusted according to the patient's body shape and fatness;

[0017] Place the CT fast positioning ruler paper on a horizontal plate, and make the positioning line of the CT fast positioning ruler paper coincide with the scanning line of the CT scanning device;

[0018] S2, the CT scanning device performs a CT scan on the human chest, and the CT scanning device obtains the depth of the lesion point and the position of the CT fast positioning ruler paper relative to the CT;

[0019] S3, adjusting the telescopic length of the telescopic L-shaped round rod, and rotating the inverted L-shaped rotating rod at the same time, until the vertical rotating round rod of the rotatable needle insertion vertical bracket is adjusted to just above the lesion point, and then positioning the telescopic L-shaped round rod;

[0020] S4, rotating the rotatable needle insertion vertical bracket so that the rotatable needle insertion vertical bracket and the horizontal round tube of the telescopic L-shaped round rod are in two mutually perpendicular vertical planes;

[0021] S5. adjusting the inclination angle of the telescopic needle insertion tube through the needle insertion angle adjustment structure according to the location of the lesion;

[0022] S6. The elongation of the second telescopic rod is given according to the position of the lesion point, and then the elongation of the first telescopic rod is calculated according to the principle of similar triangles, so as to accurately locate the needle insertion position and angle.

[0023] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0024] The present invention hinges the retractable needle insertion tube on the rotatable needle insertion vertical bracket through the needle insertion angle adjustment structure. The rotatable needle insertion vertical bracket can be rotated and adjusted laterally, and the rotatable needle insertion vertical bracket, the needle insertion angle adjustment structure, the retractable needle insertion tube and the lesion point are located in the same vertical plane perpendicular to the human ribs. The bottom end of the rotatable needle insertion vertical bracket is located directly above the lesion point. Therefore, the adjustment amount of the needle insertion angle adjustment structure can be calculated according to the principle of similar triangles. Moreover, since the tilted retractable needle insertion tube and the lesion point are always in the same straight line after adjustment, it can be ensured that the inserted puncture needle is accurately inserted into the lesion, thereby realizing accurate positioning of the lesion point, and the lesion point can be tilted and inserted between two human ribs, and the positioning is very fast and accurate.

[0025] The horizontal board of the present invention is positioned on the vertical fixed column through a first positioning adjustment structure capable of adjusting the height of the horizontal board, and the CT rapid positioning ruler paper is horizontally laid on the horizontal board, so that medical staff can adjust the position of the horizontal board according to the patient's body shape and fatness, thereby making the device suitable for different types of patients.

[0026] When the vertical rotating round rod of the rotatable needle insertion vertical bracket of the present invention rotates to just above the lesion point, the lesion point is shielded, and the X-rays emitted by the CT scanning device will not penetrate the lesion point, so that medical staff can quickly understand whether the vertical rotating round rod of the rotatable needle insertion vertical bracket in the device is moved into place, so as to facilitate subsequent operations.

[0027] The present invention extends the second telescopic rod in the needle insertion angle adjustment structure to an appropriate length, and then calculates the telescopic value of the first telescopic rod that needs to be adjusted. Since the telescopic needle insertion channel and the lesion point are always in the same straight line after adjustment, the accuracy of the puncture needle insertion is guaranteed, and the inserted puncture needle can always puncture the lesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0029] Figure 2 This is a front view of Embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the working principle structure of Embodiment 1 of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the retractable needle insertion tube when it is inserted into the puncture needle in Example 1 of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure when the position of the lesion point changes in Example 1 of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0034] Figure 7 This is a schematic diagram of the working principle structure of Example 2 of the present invention.

[0035] Wherein: 1. bed board, 2. positioning splint, 3. vertical fixing column, 4. first positioning adjustment structure, 41. first positioning locking nail, 42. adjustment block, 5. horizontal plate, 51. spirit level, 6. CT fast positioning ruler paper, 7. inverted L-shaped rotating rod, 8. retractable L-shaped round rod, 9. second positioning adjustment structure, 91. second positioning locking nail, 10. rotatable needle insertion vertical bracket, 101. vertical rotating round rod, 102. first horizontal sleeve, 103. second horizontal sleeve, 11. needle insertion angle adjustment structure, 111. first retractable rod, 112. second retractable rod, 113. hinge seat, 114. hinged positioning seat, 115. hinge shaft, 12. retractable needle insertion pipeline, 13. puncture Needle, 14. Lesion point, 15. Human rib, 16. First universal joint adjustment structure, 161. First universal joint, 162. First connecting rod, 163. Second universal joint, 164. Second connecting rod, 165. Connecting sleeve, 17. Second universal joint adjustment structure, 171. Third universal joint, 172. Third connecting rod, 173. Fourth universal joint, 174. Fourth connecting rod, 176. Positioning screw, 18. Vertical adjustment column, 19. Horizontal sliding ruler, 20. Vertical sliding ruler, 21. Inclined sliding ruler, 22. First adjustable nut, 23. Second adjustable nut, 24. Slide groove, 25. Articulated shaft, 26. Needle insertion pipe, 27. First adjusting bolt, 28. Second adjusting bolt. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] A pulmonary nodule locator, combined with Figures 1 to 5 As shown, it includes a vertical fixing column 3, a lesion point positioning mechanism and an inclined needle insertion mechanism.

[0039] The vertical fixing column 3 is positioned and clamped to the head of the bed board 1 through the positioning clamp plate 2. In the present invention, the vertical fixing column 3 is a vertical round tube. One end of the positioning clamp plate 2 is provided with a clamp, and the other end is provided with an extension plate. The vertical fixing column 3 is fixedly provided on the extension plate. The clamp can effectively clamp and position to the head of the bed board 1 to ensure the overall stability of the device.

[0040] In addition, the positioning clamp plate 2 in the present invention can also be made of an I-shaped steel plate, the notch of the I-shaped steel plate is clamped on the bed board 1, and then the I-shaped steel plate and the bed board 1 are fixed by bolts.

[0041] The lesion point positioning mechanism is connected to the vertical fixing column 3, and is used to be able to move to any position above the human ribs 15 and to be able to be positioned above the lesion point 14. The lesion point positioning mechanism includes an inverted L-shaped rotating rod 7, a retractable L-shaped round rod 8, a rotatable needle insertion vertical bracket 10 and a horizontal plate 5.

[0042] The inclined needle insertion mechanism is connected to the lesion point positioning mechanism, and is used to make the puncture needle 13 obliquely pierce the part between the human ribs and adjust the needle insertion angle. The inclined needle insertion mechanism includes a needle insertion angle adjustment structure 11 and a retractable needle insertion pipeline 12. The inclined needle insertion mechanism is arranged on a rotatable needle insertion vertical bracket 10.

[0043] The rotatable needle insertion vertical bracket 10, the needle insertion angle adjustment structure 11, the retractable needle insertion channel 12 and the lesion are located in the same vertical plane perpendicular to the human ribs, and the bottom end of the rotatable needle insertion vertical bracket 10 is located directly above the lesion. Before the present invention inserts the needle into lesions at different locations, the bottom end of the rotatable needle insertion vertical bracket 10 is always adjusted to be directly above the lesion to ensure that the present invention can achieve accurate needle insertion.

[0044] The inverted L-shaped rotating rod 7 is rotatably arranged at the top of the vertical fixed column 3, and can be rotated in the horizontal plane. The inverted L-shaped rotating rod 7 in the present invention is arranged in an inverted L-shaped circular tube shape, including a vertical tube and a horizontal tube. The vertical tube is connected to the vertical fixed column 3 by a bearing for rolling, thereby ensuring that the inverted L-shaped rotating rod 7, the telescopic L-shaped round rod 8, the rotatable needle insertion vertical bracket 10, the needle insertion angle adjustment structure 11, and the telescopic needle insertion pipeline 12 can be rotated in the horizontal plane, so that the present invention can be equally applicable when the position of the lesion changes. The horizontal tube of the inverted L-shaped rotating rod 7 is arranged in a hollow circular tube shape, ensuring that the telescopic L-shaped round rod 8 can be inserted therein.

[0045] The position of the human ribs 15 in the present invention is only for illustration. The actual length of the transverse tube of the inverted L-shaped rotating rod 7 is relatively long, which can ensure that the retractable L-shaped round rod 8 can be freely retracted and retracted just above the human ribs. The actual position of the human ribs on the bed board is to the right to ensure that the human head can be resting on the bed board.

[0046] The telescopic L-shaped round rod 8 is telescopically connected to one end of the inverted L-shaped rotating rod 7 through the second positioning adjustment structure 9. The telescopic L-shaped round rod 8 includes a transverse round tube and a vertical round tube, and the transverse round tube is inserted into the transverse tube of the inverted L-shaped rotating rod 7. A scale is set on the outer wall of the transverse round tube of the telescopic L-shaped round rod 8, which can indicate the extension amount of the telescopic L-shaped round rod 8.

[0047] The second positioning adjustment structure 9 includes a second positioning locking pin 91. A threaded hole is provided on the horizontal tube of the inverted L-shaped rotating rod 7. The second positioning locking pin 91 is threadedly connected in the threaded hole. By screwing the second positioning locking pin 91, the positioning between the inverted L-shaped rotating rod 7 and the telescopic L-shaped round rod 8 can be achieved.

[0048] The rotatable needle insertion vertical bracket 10 is vertically rotatably arranged on the telescopic L-shaped round rod 8. The rotatable needle insertion vertical bracket 10 comprises a vertically rotatable round rod 101 vertically rotatably arranged at the top of the telescopic L-shaped round rod 8, a first transverse sleeve 102 transversely fixedly arranged at the top of the vertically rotatable round rod 101, and a second transverse sleeve 103 transversely fixedly arranged at the middle of the vertically rotatable round rod 101 and parallel to the vertically rotatable round rod 101, the transverse length of the second transverse sleeve 103 is smaller than that of the first transverse sleeve 102, and the vertically rotatable round rod 101 is located directly above the lesion point.

[0049] The retractable needle insertion conduit 12 is hingedly arranged on the rotatable needle insertion vertical support 10 through the needle insertion angle adjustment structure 11, and is laterally retractably arranged on the rotatable needle insertion vertical support 10. The retractable needle insertion conduit 12 is a hollow tube and is used for piercing the puncture needle 13.

[0050] The needle insertion angle adjustment structure 11 is used to adjust the needle insertion angle and enable the puncture needle 13 to be inserted obliquely into the area between the ribs of the human body.

[0051] The needle insertion angle adjustment structure 11 includes a first telescopic rod 111 telescopically arranged on the first transverse sleeve 102 through a third positioning adjustment structure, and a second telescopic rod 112 telescopically arranged on the second transverse sleeve 103 through a fourth positioning adjustment structure, and the outer ends of the first telescopic rod 111 and the second telescopic rod 112 are respectively fixed with hinge seats 113. The vertically rotating round rod 101, the first transverse sleeve 102, the second transverse sleeve 103, the first telescopic rod 111, the second telescopic rod 112, the telescopic needle insertion channel 12 and the lesion point are located in the same vertical plane.

[0052] The side walls of the first telescopic rod 111 and the second telescopic rod 112 are respectively provided with scales for indicating telescopic lengths.

[0053] The upper and lower side walls of the telescopic needle insertion channel 12 are respectively integrally connected with a hinged positioning seat 114 , and the hinged positioning seat 114 and the hinged seat 113 are connected via a hinge shaft 115 .

[0054] The horizontal plate 5 is positioned in the middle of the vertical fixed column 3 through the first positioning adjustment structure 4, and is located directly above the bed board 1. The CT fast positioning ruler paper 6 is horizontally laid on the horizontal plate 5, which is used to enable the CT scanning device to quickly locate the lesion. In the present invention, a rectangular groove is opened in the middle of the horizontal plate 5, and the CT fast positioning ruler paper 6 is laid in the rectangular groove, and the horizontal plate 5 at the bottom of the rectangular groove is in the shape of a thin plate, which can allow the puncture needle 13 to pass through.

[0055] The first positioning adjustment structure 4 includes an adjustment block 42 fixedly connected to the horizontal plate 5 and a first positioning locking nail 41 threadedly connected to the adjustment block 42. The adjustment block 42 is sleeved on the vertical fixing column 3 and can slide up and down along the vertical fixing column 3. The positioning of the adjustment block 42 can be achieved by screwing the first positioning locking nail 41.

[0056] A scale b is provided on the side wall of the vertical fixing column 3 for indicating the vertical distance between the CT fast positioning ruler paper 6 and the bottom end of the inverted L-shaped rotating rod 7 .

[0057] A level meter 51 is provided on the top end surface of the horizontal plate 5 for detecting whether the horizontal plate 5 is in a horizontal state, so as to ensure the detection accuracy of the CT scanning device.

[0058] The actual positioning process of the puncture needle of the present invention is as follows.

[0059] S1. The patient lies flat on the bed board 1, and the medical staff adjusts the position of the horizontal board 5 according to the patient's body shape and fatness. The medical staff loosens the first positioning locking nail 41, adjusts the horizontal board 5 to a position in contact with the human chest, and observes the level meter 51 on the horizontal board 5 at the same time. According to the indication of the level meter 51, the horizontal board 5 is adjusted to a horizontal position. Then the first positioning locking nail 41 is tightened to position the horizontal board 5 on the vertical fixing column 3, and the CT fast positioning ruler paper 6 is placed on the horizontal board 5, and the positioning line of the CT fast positioning ruler paper 6 is made to coincide with the scanning line of the CT scanning device.

[0060] S2. The CT scanning device performs a CT scan on the human chest, and obtains the depth of the lesion point and the position of the CT rapid positioning ruler paper 6 relative to the CT.

[0061] S3. Adjust the telescopic length of the telescopic L-shaped round rod 8 and rotate the inverted L-shaped rotating rod 7 at the same time until the vertical rotating round rod 101 of the rotatable needle insertion vertical bracket 10 is adjusted to just above the lesion point, and then position the telescopic L-shaped round rod 8 through the second positioning locking nail 91.

[0062] In this step, when the vertical rotating rod 101 of the rotatable needle insertion vertical bracket 10 rotates to the top of the lesion point, the lesion point is shielded, and the X-rays emitted by the CT scanning device will not penetrate the lesion point, so that medical staff can quickly understand whether the vertical rotating rod 101 of the rotatable needle insertion vertical bracket 10 in the device is moved into place, so as to facilitate subsequent operations.

[0063] S4. Rotate the rotatable needle insertion vertical bracket 10 so that the rotatable needle insertion vertical bracket 10 and the horizontal circular tube of the retractable L-shaped round rod 8 are in two vertical planes perpendicular to each other. At this time, the rotatable needle insertion vertical bracket 10, the needle insertion angle adjustment structure 11, the retractable needle insertion pipe 12 and the lesion point are in the same vertical plane.

[0064] S5. According to the position of the lesion point, the inclination angle of the telescopic needle insertion tube 12 is adjusted by the needle insertion angle adjustment structure 11. The inclination angle of the telescopic needle insertion tube 12 is adjusted by changing the elongation length of the first telescopic rod 111 and the second telescopic rod 112.

[0065] S6. First, the elongation of the second telescopic rod 112 is given according to the position of the lesion point, and then the elongation of the first telescopic rod 111 is calculated according to the principle of similar triangles, so as to accurately locate the needle insertion position and angle.

[0066] A coordinate system is established with the lesion point as the center point, the extension direction of the line connecting the lesion point and the vertical rotating rod 101 is the Z axis, the line connecting the lesion point perpendicular to the human ribs is the X axis, and the line connecting the lesion point parallel to the human ribs is the Y axis. The same vertical plane where the rotatable needle insertion vertical support 10, the needle insertion angle adjustment structure 11, the telescopic needle insertion channel 12 and the lesion point are located is set as the Z plane.

[0067] Combination Figure 3 As shown, the lesion point is set as point O, the intersection point of the extension line of the connection between the lesion point and the vertical rotating round rod 101 and the second transverse sleeve 103 is point A, the intersection point of the extension line of the connection between the lesion point and the vertical rotating round rod 101 and the first transverse sleeve is point B, the intersection point of the extension line of the connection between the lesion point and the telescopic needle insertion pipe and the second telescopic rod 112 is point C, and the intersection point of the extension line of the connection between the lesion point and the telescopic needle insertion pipe and the first telescopic rod 111 is point D.

[0068] The depth of the lesion point is set to a, the vertical spacing from the horizontal plate to the first transverse sleeve is c, the vertical spacing from the horizontal plate to the second transverse sleeve is d, the length of the first transverse sleeve is e, and the length of the second transverse sleeve is f. The depth a of the lesion point can be obtained by scanning with a CT scanning device, that is, the depth a of the lesion point is known, the vertical spacing c from the horizontal plate to the first transverse sleeve is known, the vertical spacing d from the horizontal plate to the second transverse sleeve is known, the length e of the first transverse sleeve is known, and the length f of the second transverse sleeve is known. Now the telescopic length of the second telescopic rod is set to an optional value g, and the telescopic length h of the first telescopic rod can be calculated accordingly. The optional value is to adjust the telescopic length of the second telescopic rod according to the actual experience of medical staff, and the telescopic length of the second telescopic rod after adjustment can be clearly viewed by the scale on the second telescopic rod.

[0069] Among them, OA = a + d, OB = a + c, BD = e + h, AC = f + g. The length of AC can be selected according to the telescopic length value of the second telescopic rod, that is, according to the operation experience of medical staff, so the length of AC is also an optional value.

[0070] △OAC is similar to △OBD. According to the principle of similar triangles, the calculation formula is as follows:

[0071]

[0072] The value of h can be calculated by the above formula, that is, the value of h is a value related to the telescopic length value g of the second telescopic rod, that is, the length of the second telescopic rod is adjusted according to the adjusted length of the first telescopic rod. This calculation process can be calculated according to a computer and the calculation results can be displayed. Medical staff only need to check the results to know the size of the length value of the second telescopic rod after adjusting the length value of the first telescopic rod.

[0073] In actual operation, the second telescopic rod is extended to a suitable length, and the telescopic value of the first telescopic rod that needs to be adjusted can be obtained through the above calculation. After adjustment, the telescopic needle insertion channel and the lesion point are always in the same straight line, which ensures the accuracy of the puncture needle insertion and ensures that the inserted puncture needle can always puncture the lesion.

[0074] The telescopic length of the second telescopic rod in the present invention needs to be operated according to the actual experience of medical staff. In order to avoid the situation where the puncture needle pierces the human ribs when the value of the second telescopic rod is adjusted improperly, the vertical length of the vertical rotating round rod is set to be longer in the present invention, that is, the vertical length of OA is set to be longer, and the adjustable lengths of BD and AC are set to be shorter, thereby ensuring that the inclination degree of the telescopic needle insertion channel is smaller each time, that is, the angle of ∠COA is smaller, thereby ensuring that no matter how the medical staff adjusts the second telescopic rod, it will not pierce the human ribs.

[0075] When the lesion is located directly below the ribs of the human body, the angle of ∠COA can be appropriately increased, that is, the telescopic length of the second telescopic rod can be appropriately increased. When the lesion is located between the two ribs of the human body, the angle of ∠∠COA can be appropriately reduced, that is, the telescopic length of the second telescopic rod can be appropriately reduced.

[0076] Example 2

[0077] Based on Example 1, the difference between this embodiment and Example 1 is that the specific structures of the lesion point positioning mechanism and the inclined needle insertion mechanism are changed in this embodiment. Figure 6 and Figure 7 shown.

[0078] In this embodiment, the lesion point positioning mechanism includes a vertical adjustment column 18 connected to the vertical fixed column 3 through a first universal joint adjustment structure 16. The position of the vertical adjustment column 18 can be adjusted by adjusting the first universal joint adjustment structure 16 to ensure that the position of the vertical adjustment column 18 is directly above the lesion point.

[0079] The first universal joint adjustment structure 16 includes a first universal joint 161 connected to the side wall of the vertical adjustment column 18, a first connecting rod 162 connected to the first universal joint 161, a second universal joint 163 connected to the other end of the first connecting rod 162, and a second connecting rod 164 connected to the second universal joint 163, and the other end of the second connecting rod 164 is fixedly connected to a connecting sleeve 165. The vertical adjustment column 18 is sleeved in the connecting sleeve 165, and the connecting sleeve 165 is respectively provided with threaded positioning holes. The vertical adjustment column 18 and the connecting sleeve 165 are positioned by positioning screws 176 passing through the threaded positioning holes, that is, when the positioning screws 176 are in contact with the vertical adjustment column 18, they are positioned.

[0080] When the vertical adjustment column 18 and the connecting sleeve 165 are not positioned, the vertical adjustment column 18 can rotate relative to the connecting sleeve 165, thereby driving the inclined needle insertion mechanism to rotate. At the same time, the first universal joint 161 and the second universal joint 163 provided in this embodiment can ensure that the connecting sleeve 165 and the vertical adjustment column 18 can move to any position directly above the human ribs.

[0081] In this embodiment, the inclined needle insertion mechanism includes a transverse sliding ruler 19 fixed to the top end of the side wall of the vertical adjustment column 18, a vertical sliding ruler 20 locked on the transverse sliding ruler 19, an inclined sliding ruler 21 locked in the middle on the transverse sliding ruler 19 and hinged to the vertical sliding ruler 20 at one end, and a needle insertion channel 26 arranged on the inclined sliding ruler 21. The transverse sliding ruler 19, the vertical sliding ruler 20 and the inclined sliding ruler 21 are respectively provided with sliding grooves 24.

[0082] The transverse sliding ruler 19 , the vertical sliding ruler 20 and the inclined sliding ruler 21 are respectively provided with scales. The distance between the vertical sliding ruler 20 and the axis of the vertical adjustment column 18 can be directly read on the transverse sliding ruler 19 , and the length of the vertical sliding ruler 20 located below the intersection of the vertical sliding ruler 20 and the transverse sliding ruler 19 can be directly read from the vertical sliding ruler 20 .

[0083] The horizontal sliding ruler 19 and the vertical sliding ruler 20 are positioned by a first locking and positioning structure, and the first locking and positioning structure includes a first adjusting bolt 27, a first adjustable nut 22 and a first locking nut. The first adjusting bolt 27 passes through the slide grooves on the horizontal sliding ruler 19 and the vertical sliding ruler 20 respectively. The first locking nut is arranged behind the horizontal sliding ruler 19 and is locked and positioned with the first adjusting bolt 27. The diameter of the first locking nut is larger than the horizontal width of the slide groove. The first adjustable nut 22 is threadedly connected with the first adjusting bolt 27 and is arranged in front of the vertical sliding ruler 20. The diameter of the first adjustable nut 22 is larger than the horizontal width of the slide groove. By adjusting the first adjustable nut 22, the locking between the horizontal sliding ruler 19 and the vertical sliding ruler 20 can be achieved.

[0084] The tilting sliding scale 21 and the transverse sliding scale 19 are positioned by a second locking and positioning structure, and the second locking and positioning structure includes a second adjusting bolt 28, a second adjustable nut 23 and a second locking nut. The second adjusting bolt 28 passes through the slide grooves on the transverse sliding scale 19 and the tilting sliding scale 21 respectively. The second locking nut is arranged behind the transverse sliding scale 19 and is locked and positioned with the second adjusting bolt 28. The diameter of the second locking nut is larger than the transverse width of the slide groove. The second adjustable nut 23 is threadedly connected with the second adjusting bolt 28 and is arranged in front of the tilting sliding scale 21. The diameter of the second adjustable nut 23 is larger than the transverse width of the slide groove. By adjusting the second adjustable nut 23, the locking between the transverse sliding scale 19 and the tilting sliding scale 21 can be achieved.

[0085] The bottom end of the inclined sliding ruler 21 is hinged to the bottom end of the vertical sliding ruler 20 via a hinge shaft 25 .

[0086] The needle insertion channel 26 is disposed on the inclined sliding ruler 21 . The needle insertion channel 26 is parallel to the side wall of the inclined sliding ruler 21 . The puncture needle 13 is inserted into the needle insertion channel 26 .

[0087] In addition, the horizontal plate 5 in this embodiment is positioned on the side wall of the vertical fixed column 3 through the second universal joint adjustment structure 17, the CT fast positioning ruler paper 6 is horizontally laid on the horizontal plate 5, and a level meter is also arranged on the top surface of the horizontal plate 5.

[0088] The second universal joint adjustment structure 17 includes a third universal joint 171 connected to the side wall of the vertical fixed column 3, a third connecting rod 172 connected to the third universal joint 171, a fourth universal joint 173 connected to the other end of the third connecting rod 172, and a fourth connecting rod 174 connected to the fourth universal joint 173, and the other end of the fourth connecting rod 174 is fixed to the horizontal plate 5.

[0089] An infrared rangefinder is provided at the bottom end of the vertical adjustment column 18, which can measure the distance between the bottom end of the vertical adjustment column 18 and the CT fast positioning ruler paper.

[0090] The actual positioning process of the puncture needle in this embodiment is as follows.

[0091] S1. The patient lies flat on the bed board 1, and the medical staff adjusts the position of the horizontal board 5 according to the patient's body shape and fatness.

[0092] S2. The CT scanning device performs a CT scan on the human chest, and obtains the depth of the lesion point and the position of the CT rapid positioning ruler paper 6 relative to the CT.

[0093] S3. Adjust the position of the vertical adjustment column 18 through the first universal joint adjustment structure 16 to adjust the vertical adjustment column 18 to be directly above the lesion point.

[0094] S4. Combination Figure 7 As shown, the lesion point is set as point O, the point where the line connecting the lesion point and the vertical adjustment column 18 is extended and connected to the central axis of the horizontal sliding ruler 19 is point A, the point where the central axis of the needle insertion channel 26 is connected to the central axis of the horizontal sliding ruler 19 is point D, the point where the right edge of the vertical sliding ruler 20 is connected to AD is point B, and the point where the right edge of the vertical sliding ruler 20 is connected to DO is point C.

[0095] Since the distance between point A and the bottom end of the vertical adjustment column 18 is a fixed value, the distance between the bottom end of the vertical adjustment column 18 and the CT fast positioning ruler paper can be directly measured by an infrared rangefinder, and the distance between the CT fast positioning ruler paper and the lesion point can be obtained by scanning the CT scanning device, and then the distance between AO is a value that can be calculated, and the length of AO is set to a. Adjust the positioning position of the vertical sliding ruler 20, that is, adjust the length of BC and AB. The length of BC and AB can be determined by the experience of medical staff, that is, the length of BC and AB is a determinable value, and the length of BC is set to b, and the length of AB is set to c. On this basis, the determination of the needle insertion position can be obtained by adjustment, and the length of AD is set to d, that is, the length value of AD is calculated. Adjusting the inclined sliding ruler 21 according to this value can ensure that the needle insertion position passes through the lesion point.

[0096] △OAD is similar to △CBD. According to the principle of similar triangles, the calculation formula is as follows:

[0097]

[0098] The value of d can be calculated by the above formula, and the medical staff can adjust the inclined sliding ruler 21 according to the value of d. When the inclined sliding ruler 21 is adjusted to this value, it can be ensured that the puncture needle can pass through the lesion.

Claims

1. Pulmonary nodule locator, characterized by: The invention comprises a vertical fixing column (3) which is positioned and clamped to the bed board (1) by a positioning clamp (2); the vertical fixing column (3) is connected to a lesion point positioning mechanism which is capable of moving to a position directly above the human ribs (15) and being capable of positioning directly above the lesion point; the lesion point positioning mechanism is connected to an inclined needle insertion mechanism which is capable of allowing the puncture needle (13) to be obliquely inserted into the area between the human ribs and capable of adjusting the needle insertion angle; A horizontal plate (5) located directly above the bed board (1) is positioned in the middle of the vertical fixed column (3) through a first positioning adjustment structure (4), and a CT fast positioning ruler paper (6) is horizontally laid on the horizontal plate (5); The lesion point positioning mechanism comprises an inverted L-shaped rotating rod (7) rotatably arranged at the top end of the vertical fixed column (3) and capable of rotating in a horizontal plane, a telescopic L-shaped round rod (8) telescopically connected to one end of the inverted L-shaped rotating rod (7) via a second positioning adjustment structure (9), and a rotatable needle insertion vertical bracket (10) vertically rotatably arranged on the telescopic L-shaped round rod (8), the bottom end of the rotatable needle insertion vertical bracket (10) being located directly above the lesion point, and the inclined needle insertion mechanism being arranged on the rotatable needle insertion vertical bracket (10); The inclined needle insertion mechanism comprises a needle insertion angle adjustment structure (11) which is laterally telescopically arranged on a rotatable needle insertion vertical support (10) for adjusting the needle insertion angle and enabling the puncture needle (13) to obliquely puncture the area between the human ribs, and a telescopic needle insertion tube (12) which is hingedly arranged at the end of the needle insertion angle adjustment structure (11) for puncturing the puncture needle (13); the rotatable needle insertion vertical support (10), the needle insertion angle adjustment structure (11), the telescopic needle insertion tube (12) and the lesion point are located in the same vertical plane perpendicular to the human ribs; The rotatable needle insertion vertical support (10) comprises a vertically rotatable round rod (101) vertically rotatably arranged at the top of the retractable L-shaped round rod (8), a first transverse sleeve (102) transversely fixedly arranged at the top of the vertically rotatable round rod (101), and a second transverse sleeve (103) transversely fixedly arranged at the middle of the vertically rotatable round rod (101) and parallel to the first transverse sleeve (102), wherein the transverse length of the second transverse sleeve (103) is smaller than that of the first transverse sleeve (102), and the vertically rotatable round rod (101) is located directly above the lesion point; The needle insertion angle adjustment structure (11) comprises a first telescopic rod (111) telescopically arranged on the first transverse sleeve (102) via a third positioning adjustment structure and a second telescopic rod (112) telescopically arranged on the second transverse sleeve (103) via a fourth positioning adjustment structure, and the outer ends of the first telescopic rod (111) and the second telescopic rod (112) are respectively fixedly provided with hinge seats (113); the vertical rotating round rod (101), the first transverse sleeve (102), the second transverse sleeve (103), the first telescopic rod (111), the second telescopic rod (112), the telescopic needle insertion channel (12) and the lesion point are located in the same vertical plane.

2. The pulmonary nodule locator according to claim 1, characterized in that: The side walls of the first telescopic rod (111) and the second telescopic rod (112) are respectively provided with scales for indicating telescopic lengths.

3. The pulmonary nodule locator according to claim 1, characterized in that: The upper and lower side walls of the telescopic needle insertion tube (12) are respectively integrally connected with a hinged positioning seat (114), and the hinged positioning seat (114) and the hinged seat (113) are connected via a hinge shaft (115).

4. The pulmonary nodule locator according to claim 1, characterized in that: A level meter (51) is provided on the top end surface of the horizontal plate (5) for detecting whether the horizontal plate (5) is in a horizontal state to ensure the detection accuracy of the CT scanning device.

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