Puncture needle guiding device

Abstract

The invention provides a puncture needle guiding device, and relates to the field of puncture equipment. The guiding device is connected with a mechanical arm through the connecting assembly, the puncture assembly can be stably clamped through the clamping assembly, the clamping assembly is movably connected with the connecting assembly, and therefore a doctor can conveniently control puncture needle insertion at a preset position and a preset angle; furthermore, according to the guiding device, a detection assembly is arranged at the puncture assembly, the moving distance of the puncture needle relative to the fixing base can be detected in real time through the detection assembly, and therefore a doctor can conveniently know the puncture depth of the puncture needle in real time, and the doctor can conveniently deal with emergencies in time.

Description

Technical Field

[0001] The present application relates to the field of puncture equipment, and in particular to a puncture needle guiding device. Background Art

[0002] CT-guided puncture biopsy has been widely used in clinical practice. When doctors perform manual puncture, the insertion point and path of the puncture needle need to be judged by the doctors based on their experience, and the puncture effect depends on the doctors' clinical skills and experience. In addition, during the puncture process, doctors need to constantly adjust the needle insertion path according to CT images. Human hand shaking and emotional influences may cause puncture deviations and affect the accuracy of the biopsy.

[0003] At present, the above problems are usually solved by puncture surgical robots. Based on the lesion information provided by the CT image, the puncture surgical robot can position the end of the robotic arm near the lesion and maintain the puncture position and puncture angle through the guide, and then the doctor manually advances the puncture needle. However, during the doctor's manual needle insertion process, the puncture surgical robot cannot know the length of the puncture needle passing through the guide in real time, that is, the doctor cannot know the insertion depth of the puncture needle in real time, which is not conducive to the doctor's response to certain emergencies that may occur during the puncture process. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a puncture needle guiding device to solve the problem that the existing puncture surgical robot cannot reflect the insertion depth of the puncture needle in real time during use.

[0005] According to the above purpose, the present invention provides a puncture needle guiding device, wherein the puncture needle guiding device comprises:

[0006] A connecting component connected to the robot arm;

[0007] A clamping assembly is movably connected to the connecting assembly; the clamping assembly is formed with a clamping portion;

[0008] The puncture assembly comprises a fixing seat and a puncture needle movably connected to the fixing seat; the fixing seat is detachably connected to the clamping part; and

[0009] The detection component is arranged at the puncture component, and the detection component can detect the moving distance of the puncture needle relative to the fixing seat in real time.

[0010] Preferably, the connecting assembly comprises a connecting disk and a connecting rod connected in sequence, and the connecting disk is correspondingly connected to the robotic arm via a connecting piece; along the axial direction of the connecting rod, the clamping assembly is movably connected to one end of the connecting rod away from the connecting disk.

[0011] Preferably, the clamping assembly includes a clamping seat, the extension direction of which is perpendicular to the axial direction of the connecting rod; the first end of the clamping seat in the extension direction is movably connected to the connecting rod, and the second end of the clamping seat in the extension direction is rotatably connected to two clamping claws to form the clamping part.

[0012] Preferably, a protruding plug-in column is formed at the center of the end surface of the first end of the clamping seat; the outer wall of the connecting rod is formed with a first plug-in hole corresponding to the plug-in column; the plug-in column can be extended and retracted relative to the first plug-in hole and can be rotated relative to the first plug-in hole.

[0013] Preferably, the clamping assembly also includes a step bolt, which is formed with a limiting section, a transition section and a threaded section connected in sequence, and the outer diameters of the limiting section, the transition section and the threaded section decrease successively; the outer diameter of the transition section is smaller than the outer diameter of the plug-in column.

[0014] Preferably, a second plug-in hole is also formed on the outer side wall of the connecting rod, the axis of the second plug-in hole is colinear with the axis of the first plug-in hole, and the inner diameter of the second plug-in hole is correspondingly matched with the outer diameter of the limiting section; the second plug-in hole is connected with the first plug-in hole through a through hole, and the inner diameter of the through hole is correspondingly matched with the inner diameter of the transition section; the threaded section extends into the first plug-in hole and is correspondingly screwed with the plug-in column; a spring is arranged in the second plug-in hole, the spring is sleeved on the outer side wall of the transition section, and the end of the spring is connected to the end face of the second plug-in hole facing the limiting section.

[0015] Preferably, a threaded hole is further formed on the outer side wall of the connecting rod, and the axis of the threaded hole is perpendicular to the first plug-in hole; a limit screw is detachably connected to the threaded hole, and the limit screw can abut against the side wall of the plug-in column.

[0016] Preferably, the two clamping jaws are rotatably connected to the clamping seat via a pin and a torsion spring; when the two clamping jaws are in a clamping state, an outer side wall of the clamping jaw forms an angle with an outer side wall corresponding to the clamping seat;

[0017] The clamping assembly further comprises a locking sleeve, which is sleeved on the outer peripheral side of the clamping seat and / or the clamping claw through a wedge-shaped hole, and the locking sleeve can move along the clamping seat.

[0018] Preferably, the fixing seat and the clamping portion are formed into corresponding step-shaped structures, and the fixing seat and the clamping portion are formed with corresponding electrically connected contacts, and the contacts are communicatively connected or electrically connected to the computer.

[0019] Preferably, a limiting hole corresponding to the puncture needle is formed at the center of the fixing seat, and the puncture needle can move along the axial direction of the limiting hole;

[0020] The detection component includes a light source and a chip electrically connected to the contacts. The light source can emit a light beam toward the side wall of the puncture needle. The light beam can be received by the chip after being reflected by the side wall of the puncture needle. The chip can transmit the received light signal to the computer through the contacts.

[0021] According to the puncture needle guiding device of the present invention, the guiding device is connected to the mechanical arm through a connecting component, and the puncture component can be stably clamped by a clamping component, and the clamping component is movably connected to the connecting component, so that it is convenient for the doctor to control the insertion of the puncture needle at a preset position and a preset angle; further, the guiding device is provided with a detection component at the puncture component, through which the moving distance of the puncture needle relative to the fixing seat can be detected in real time, so that it is convenient for the doctor to know the insertion depth of the puncture needle in real time, and then it is beneficial for the doctor to respond to emergencies in a timely manner.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic diagram of a puncture needle guiding device according to an embodiment of the present invention;

[0025] Figure 2 is another schematic diagram of a puncture needle guiding device according to an embodiment of the present invention;

[0026] Figure 3 is a partial exploded view of a puncture needle guiding device according to an embodiment of the present invention;

[0027] Figure 4 is a cross-sectional schematic diagram of a puncture needle guiding device according to an embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of a fixing base according to an embodiment of the present invention;

[0029] Figure 6 Schematic diagram of a detection assembly and a puncture needle according to an embodiment of the present invention.

[0030] Icons: 10-connecting plate; 11-connecting rod; 20-step bolt; 200-limiting section; 201-transition section; 202-threaded section; 21-spring; 22-clamping seat; 220-plug-in column; 23-limiting screw; 24-pin shaft; 25-torsion spring; 26-clamping claw; 27-locking sleeve; 30-fixing seat; 31-puncture needle; 40-contact; 41-light source; 42-chip; 43-circuit board. DETAILED DESCRIPTION

[0031] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0032] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0033] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0034] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0035] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0036] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0037] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0038] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0039] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0040] The present invention provides a puncture needle guiding device, such as Figures 1 to 6As shown, the puncture needle guiding device in this embodiment includes a connecting component, a clamping component, a puncture component and a detection component. The connecting component, the clamping component and the puncture component can facilitate the doctor to control the puncture needle 31 to be stably inserted at a preset position and a preset angle, and the detection component can detect and feedback the insertion depth of the puncture needle 31 in real time. Hereinafter, the specific connection relationship and position relationship of the above components of the puncture needle guiding device (hereinafter referred to as the guiding device) according to the present invention will be described in detail.

[0041] In this embodiment, if Figures 1 to 4 As shown, the connection assembly includes a connection disk 10 and a connection rod 11 connected in sequence, and the connection disk 10 is connected to the robot arm through a connection piece such as a screw, so that the robot arm can move the guide device to a preset position (the position depends on the location of the lesion and should be convenient for the doctor to insert the needle); in addition, the connection rod 11 is formed into a columnar structure, and its two ends in the axial direction are respectively connected to the connection disk 10 and the clamping assembly described below. It should be noted that the specifications, connection methods and shapes of the connection disk 10 and the connection rod 11 are not limited thereto, as long as the above-mentioned technical effects can be achieved to facilitate the doctor's insertion of the needle.

[0042] In this embodiment, if Figures 1 to 4 As shown, the clamping assembly includes a clamping seat 22, the extension direction of which is perpendicular to the axial direction of the connecting rod 11, and the first end of the clamping seat 22 in the extension direction is movably connected to the connecting rod 11, and the second end of the clamping seat 22 in the extension direction is rotatably connected to two clamping claws 26 to form a clamping portion of the clamping assembly. Specifically, the first end of the clamping seat 22 in this embodiment is formed into a rectangular parallelepiped structure, and the second end thereof is formed into an arc-shaped structure to facilitate the rotation of the clamping claws 26.

[0043] More specifically, a protruding plug-in column 220 is formed at the center of the end surface of the first end of the clamping seat 22. Figure 4 As shown, the plug-in column 220 in this embodiment is formed as a cylindrical structure; correspondingly, the outer wall of the above-mentioned connecting rod 11 (facing the clamping seat 22) is formed with a first plug-in hole corresponding to the plug-in column 220. When the clamping seat 22 is connected to the connecting rod 11, the plug-in column 220 extends into the first plug-in hole and can move relative to the first plug-in hole (that is, the plug-in column 220 can be extended and retracted relative to the first plug-in hole and can be rotated relative to the first plug-in hole). In order to achieve this technical effect, the first plug-in hole and the plug-in column 220 should be clearance-matched. However, it is not limited to this, such as Figure 4 As shown, the plug-in column 220 can also be set to a step-like structure, that is, the small diameter end of the plug-in column 220 corresponds to being inserted into the first plug-in hole, and its large diameter end can play a technical role of limiting, so as to improve the stability of the overall structure of the guiding device (if it is not set to a step structure, the end of the clamping seat 22 can also play a limiting role).

[0044] In addition, the clamping assembly in this embodiment further includes a step bolt 20, such as Figure 4 As shown, the step bolt 20 is formed with a limiting section 200, a transition section 201 and a threaded section 202 connected in sequence, the outer diameters of the limiting section 200, the transition section 201 and the threaded section 202 are successively reduced, and the outer diameter of the transition section 201 is smaller than the outer diameter of the plug-in column 220. Correspondingly, the outer wall of the connecting rod 11 is also formed with a second plug-in hole, the axis of the second plug-in hole, the axis of the first plug-in hole and the axis of the plug-in column 220 are all on the same straight line, and the inner diameter of the second plug-in hole is correspondingly adapted to the outer diameter of the limiting section 200 (the two are clearance fit).

[0045] Furthermore, the second plug-in hole is connected to the first plug-in hole through a through hole, and the inner diameter of the through hole is adapted to the inner diameter of the transition section 201 (the two are clearance fit), so that the threaded section 202 can extend into the first plug-in hole and be screwed to the plug-in column 220. Preferably, the connection hole corresponding to the first threaded section 202 formed on the plug-in column 220 is located at the center of its end, so as to improve the stability of the clamping assembly structure. In addition, a spring 21 is also provided in the second plug-in hole, and the spring 21 is sleeved on the outer side wall of the transition section 201, and the end of the spring 21 is connected to the end face of the second plug-in hole facing the limiting section 200.

[0046] In addition, a threaded hole is formed on the outer wall of the connecting rod 11, the axis of the threaded hole is perpendicular to the above-mentioned first plug-in hole (the axis), and a corresponding limit screw 23 is detachably connected in the threaded hole, and the limit screw 23 and the threaded hole can abut against the side wall of the plug-in column 220 after being connected.

[0047] So, like Figure 1 The figure shows a certain state of the present guiding device. In this state, the puncture needle 31 is parallel to the axis of the connecting rod 11. However, if the puncture needle 31 in this state is not convenient for the doctor to puncture, the angle of the clamping assembly and the puncture assembly it clamps can be flexibly adjusted according to the actual situation. Specifically, first rotate the limit screw 23 until it is separated from the plug-in column 220, and then pull the plug-in column 220 out of the first plug-in hole in a direction away from the connecting rod 11 (pull it out to facilitate the rotation of the holding assembly). At this time, the step bolt 20 and the plug-in column 220 keep moving synchronously and compress the spring 21; then rotate the clamping assembly to an angle that is convenient for needle insertion and slowly release the clamping assembly. Under the elastic force of the spring 21, the plug-in column 220 retracts into the first plug-in hole; finally, rotate the limit screw 23 again to a state where it abuts against the plug-in column 220. As shown in FIG. Figure 2 The figure shows another state of the guiding device. In this state, the puncture needle 31 is perpendicular to the axis of the connecting rod 11 .

[0048] In this embodiment, if Figure 3 to Figure 4 As shown, the clamping assembly realizes stable clamping of the puncture assembly through two clamping claws 26. The two clamping claws 26 are rotatably connected to the second end of the clamping seat 22 through the pin shaft 24 and the torsion spring 25. The torsion spring 25 is sleeved on the outer side wall of the pin shaft 24 and is respectively connected to the two clamping claws 26, that is, the two clamping claws 26 in this embodiment are in an open state in a natural state. Therefore, in order to realize the clamping of the puncture assembly by the clamping claws 26, the clamping assembly is also provided with a locking sleeve 27. Specifically, as shown in the figure, when the clamping jaw 26 is in the clamping state, its outer side wall forms an angle with the outer side wall corresponding to the clamping seat 22, and correspondingly, the locking sleeve 27 forms a wedge-shaped hole adapted to the clamping seat 22 and the clamping jaw 26. In this way, when the puncture assembly needs to be released, the locking sleeve 27 is moved toward the direction close to the connecting rod 11, and the two clamping jaws 26 are opened under the action of the torsion spring 25; and when the puncture assembly needs to be clamped, the locking sleeve 27 is moved toward the direction away from the connecting rod 11.

[0049] In this embodiment, the puncture assembly includes a fixing seat 30, such as Figure 5 As shown, the fixing seat 30 is formed into a step-like structure, and the clamping part formed by the two clamping claws 26 is adapted to the fixing seat 30. Further, the fixing seat 30 and the clamping part are formed with corresponding electrical connection contacts 40, and the contacts 40 are connected to the computer for communication or electrical connection. The contacts 40 are actually formed into a concave-convex matching structure, so the stability of the connection between the fixing seat 30 and the clamping part can also be improved through the contacts 40. In addition, a limiting hole corresponding to the puncture needle 31 is formed at the center of the fixing seat 30, and the puncture needle 31 can move along the axial direction of the limiting hole, so that when the connecting component and the clamping component position the puncture needle 31 to the preset position and preset angle according to the position of the lesion, under the limiting effect of the limiting hole, the doctor can directly control the puncture needle 31 to be inserted at a preset angle at a preset position to ensure the treatment effect.

[0050] Furthermore, the puncture assembly is also provided with a detection assembly, through which the moving distance of the puncture needle 31 relative to the fixing seat 30 can be detected in real time, and thus the insertion depth of the puncture needle 31 can be known in real time. The detection assembly includes a light source 41 and a chip 42, both of which are arranged at the inner wall of the limiting hole facing the puncture needle 31. Preferably, the chip 42 is arranged in contact with the bottom edge of the limiting hole. The light source 41 can emit a light beam to the side wall of the puncture needle 31, and the light beam can be received by the chip 42 after being reflected by the side wall of the puncture needle 31. Then, the chip 42 can transmit the received light signal to the computer through the contact 40, and the moving distance of the puncture needle 31 relative to the fixing seat 30 can be known in real time through the computer program calculation. The connection mode between the chip 42 and the contact 40 is not fixed. In this embodiment, a circuit board 43 is arranged between the two, or the two can also be connected by communication.

[0051] It should be noted that the above-mentioned light source 41, chip 42 and contact 40 are all existing components, which play their own inherent functions in this embodiment, so their specific operations such as computer calculations are not described in detail.

[0052] According to the puncture needle guiding device of the present invention as described above, the guiding device is connected to the robotic arm through a connecting component, and the puncture component can be stably clamped by a clamping component, and the clamping component is movably connected to the connecting component, so that it is convenient for the doctor to control the insertion of the puncture needle 31 at a preset position and a preset angle; further, the guiding device is provided with a detection component at the puncture component, through which the moving distance of the puncture needle 31 relative to the fixing seat 30 can be detected in real time, so that it is convenient for the doctor to know the insertion depth of the puncture needle 31 in real time, and thus it is beneficial for the doctor to respond to emergencies in a timely manner.

[0053] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be described in the protection scope of the claims.

Claims

1. A puncture needle guiding device, characterized in that: The puncture needle guiding device comprises: A connecting component connected to the robot arm; A clamping assembly is movably connected to the connecting assembly; the clamping assembly is formed with a clamping portion; The puncture assembly comprises a fixing seat and a puncture needle movably connected to the fixing seat; the fixing seat is detachably connected to the clamping part; and The detection component is arranged at the puncture component, and the detection component can detect the moving distance of the puncture needle relative to the fixing seat in real time.

2. The puncture needle guiding device according to claim 1, characterized in that: The connection assembly includes a connection disk and a connection rod connected in sequence, and the connection disk is correspondingly connected to the mechanical arm through a connecting piece; along the axial direction of the connection rod, the clamping assembly is movably connected to one end of the connection rod away from the connection disk.

3. The puncture needle guiding device according to claim 2, characterized in that: The clamping assembly includes a clamping seat, the extension direction of which is perpendicular to the axial direction of the connecting rod; the first end of the clamping seat in the extension direction is movably connected to the connecting rod, and the second end of the clamping seat in the extension direction is rotatably connected to two clamping claws to form the clamping part.

4. The puncture needle guiding device according to claim 3, characterized in that: A protruding plug-in column is formed at the center of the end surface of the first end of the clamping seat; a first plug-in hole corresponding to the plug-in column is formed on the outer wall of the connecting rod; the plug-in column can be extended and retracted relative to the first plug-in hole and can be rotated relative to the first plug-in hole.

5. The puncture needle guiding device according to claim 4, characterized in that: The clamping assembly also includes a step bolt, which is formed with a limiting section, a transition section and a threaded section connected in sequence, and the outer diameters of the limiting section, the transition section and the threaded section decrease in sequence; the outer diameter of the transition section is smaller than the outer diameter of the plug-in column.

6. The puncture needle guiding device according to claim 5, characterized in that: A second plug-in hole is also formed on the outer side wall of the connecting rod, the axis of the second plug-in hole is colinear with the axis of the first plug-in hole, and the inner diameter of the second plug-in hole is correspondingly matched with the outer diameter of the limiting section; the second plug-in hole is connected with the first plug-in hole through a through hole, and the inner diameter of the through hole is correspondingly matched with the inner diameter of the transition section; the threaded section extends into the first plug-in hole and is screwed correspondingly with the plug-in column; a spring is arranged in the second plug-in hole, the spring is sleeved on the outer side wall of the transition section, and the end of the spring is connected to the end face of the second plug-in hole facing the limiting section.

7. The puncture needle guiding device according to claim 4, characterized in that: A threaded hole is also formed on the outer side wall of the connecting rod, and the axis of the threaded hole is perpendicular to the first plug-in hole; a limit screw is detachably connected to the threaded hole, and the limit screw can abut against the side wall of the plug-in column.

8. The puncture needle guiding device according to claim 3, characterized in that: The two clamping jaws are rotatably connected to the clamping seat through a pin shaft and a torsion spring; when the two clamping jaws are in a clamping state, an outer side wall of the clamping jaws forms an angle with an outer side wall corresponding to the clamping seat; The clamping assembly further comprises a locking sleeve, which is sleeved on the outer peripheral side of the clamping seat and / or the clamping claw through a wedge-shaped hole, and the locking sleeve can move along the clamping seat.

9. The puncture needle guiding device according to claim 3, characterized in that: The fixing seat and the clamping portion are formed into corresponding step-shaped structures, and the fixing seat and the clamping portion are formed with corresponding electrically connected contacts, and the contacts are communicatively connected or electrically connected to the computer.

10. The puncture needle guiding device according to claim 9, characterized in that: A limiting hole corresponding to the puncture needle is formed at the center of the fixing seat, and the puncture needle can move along the axial direction of the limiting hole; The detection component includes a light source and a chip electrically connected to the contacts. The light source can emit a light beam toward the side wall of the puncture needle. The light beam can be received by the chip after being reflected by the side wall of the puncture needle. The chip can transmit the received light signal to the computer through the contacts.

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