CN115670605A - Central venous catheter puncture needle based on near infrared spectrum and pressure monitoring function - Google Patents
Central venous catheter puncture needle based on near infrared spectrum and pressure monitoring function Download PDFInfo
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- CN115670605A CN115670605A CN202211289270.XA CN202211289270A CN115670605A CN 115670605 A CN115670605 A CN 115670605A CN 202211289270 A CN202211289270 A CN 202211289270A CN 115670605 A CN115670605 A CN 115670605A
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Abstract
The invention provides a central venous catheter puncture needle based on near infrared spectrum and pressure monitoring functions, and relates to the technical field of catheter puncture needles. The central venous catheter puncture needle based on the near infrared spectrum and the pressure monitoring function comprises a mounting seat with a hollow inner part and a puncture needle body arranged on the mounting seat, wherein the puncture needle body is communicated with the mounting seat; the system also comprises an infrared light source, a camera, a computer and a projector, wherein the infrared light source, the camera and the projector are all electrically connected with the computer. By adopting the invention, infrared light can be projected on the puncture part of a patient through a near infrared spectrum technology, the infrared light is reflected by the subcutaneous vein and then is received by the camera for imaging, the subcutaneous vein track of the illuminated area is projected on the surface of the skin of the patient by the projector, thus being convenient for medical personnel to judge during puncture and improving the puncture precision.
Description
Technical Field
The invention relates to the technical field of catheter puncture needles, in particular to a central venous catheter puncture needle based on near infrared spectrum and pressure monitoring functions.
Background
The central venous catheterization (or called central venous catheterization) is widely applied to tumor patients, and the common central venous catheterization ways at present comprise internal jugular veins, subclavian veins and femoral veins, and are mainly suitable for central venous pressure measurement, hemodynamic monitoring, temporary and permanent pacing, venous eutrophication, electrophysiological examination and the like. When the central venous catheterization is implemented, a set of central venous catheter is generally required, the central venous catheter generally comprises a puncture needle, a guide wire and a catheter, and the central venous catheterization usually comprises the following operation steps:
(1) the puncture needle punctures the target blood vessel;
(2) the guide wire is fed in through the puncture needle, namely the puncture needle is used as a tunnel, so that the guide wire is inserted into the target blood vessel through the puncture needle;
(3) withdrawing the puncture needle, namely withdrawing the puncture needle from the outer side of the guide wire;
(4) guiding by using a guide wire, sleeving a catheter on the guide wire, and inserting one end of the catheter into a target blood vessel through the guide wire so that the catheter is arranged at a preset position;
(5) and finally, the guide wire is drawn out from the interior of the catheter, so that the catheterization work is completed.
Many patients have difficulty with venipuncture, including: infants, children, fat patients, edema patients and other patients who are not easy to see veins, or patients who are chemotherapy patients for many times, patients with poor blood vessel elasticity, emergency treatment, shock, sudden blood volume reduction, patients with blood vessel collapse and the like. When venipuncture is performed, the part of the switch node needs to be avoided, the surface of the skin has hard knots and scars, and the vein valve, the vein branch and the vein with lesion on the vein wall are formed. Failure of venipuncture can lead to complications of venipuncture such as: phlebitis, hemorrhage and hematoma, exudation, tissue necrosis or catheter blockage. Common causes of venipuncture failure: the puncture technique is not skilled, so that the needle tip is damaged; the puncture excessively punctures the vein posterior wall; when the puncture is insufficient, only the needle point is punctured into the vein; the puncture angle is too small, and the vein wall is scratched.
At present, medical staff generally adopt two methods when performing venipuncture, one is a visual method, namely a naked eye method is used for searching and positioning blood vessels, the method is only suitable for patients with superficial and prominent vein positions, and accurate positioning cannot be actually guaranteed for the size, bending and bifurcation states of blood vessels of subcutaneous tissues; still another method is a touch method, which is to find and locate the blood vessel with the feeling of touch, and this method requires many years of clinical experience, and the position and depth of the blood vessel are determined by touching the skin to distinguish the touch feeling of the blood vessel and the surrounding tissue. The two methods mainly pass through the experience of medical personnel, and the error is large.
Disclosure of Invention
The invention aims to provide a central venous catheter puncture needle based on a near infrared spectrum and a pressure monitoring function, which can project infrared light on a puncture part of a patient through a near infrared spectrum technology, the infrared light is reflected by a subcutaneous vein and then is received by a camera for imaging, and a subcutaneous vein track of an illuminated area is projected on the surface of the skin of the patient through a projector, so that medical personnel can judge the puncture needle conveniently, and the puncture precision is improved.
The embodiment of the invention is realized by the following steps:
the embodiment of the application provides a central venous catheter puncture needle based on near infrared spectrum and pressure monitoring functions, which comprises a mounting seat with a hollow inner part and a puncture needle body arranged on the mounting seat, wherein the puncture needle body is communicated with the mounting seat; the system also comprises an infrared light source, a camera, a computer and a projector, wherein the infrared light source, the camera and the projector are all electrically connected with the computer.
Further, in some embodiments of the present invention, the computer further comprises a pressure monitoring module for monitoring the pressure inside the mounting seat, and the pressure monitoring module is electrically connected to the computer.
Further, in some embodiments of the present invention, the pressure monitoring module includes a pressure sensor and a pressure monitoring seat, the pressure monitoring seat is hollow, and the pressure monitoring seat is disposed on the mounting seat and is communicated with the mounting seat; the pressure sensor is arranged in the pressure monitoring seat and electrically connected with the computer.
Further, in some embodiments of the present invention, a sealing seat is disposed in the mounting seat, and the sealing seat is provided with a through hole.
Further, in some embodiments of the present invention, the sealing seat includes an elastic cushion block and an elastic pressing block, the cushion block and the pressing block are disposed at an interval and are both disposed on an inner side wall of the mounting seat, and the insertion hole is located between the cushion block and the pressing block.
Further, in some embodiments of the present invention, the cushion block and the pressing block are both made of rubber blocks.
Further, in some embodiments of the present invention, the mounting seat is movably provided with a pressing member for pressing the pressing block toward the pad block side, and the pressing member abuts against the pressing block.
Further, in some embodiments of the present invention, the pressing assembly includes a screw and a pressing plate, and the pressing plate is located in the mounting seat and abuts against the pressing block; the mounting seat is provided with a screw hole, the screw rod penetrates through the screw hole and is in threaded connection with the mounting seat, one end of the screw rod is connected with the pressing plate, and the other end of the screw rod is located outside the mounting seat.
Further, in some embodiments of the present invention, a rotating disc is disposed at an end of the screw rod located outside the mounting seat.
Further, in some embodiments of the present invention, the pressing block and the cushion block are both arched, the pressing block is hollow, and the pressing plate is located inside the pressing block.
Compared with the prior art, the embodiment of the invention at least has the following advantages or beneficial effects:
the embodiment of the invention provides a central venous catheter puncture needle based on near infrared spectrum and pressure monitoring functions, which comprises a mounting seat with a hollow interior and a puncture needle body arranged on the mounting seat, wherein the puncture needle body is communicated with the mounting seat; the system also comprises an infrared light source, a camera, a computer and a projector, wherein the infrared light source, the camera and the projector are all electrically connected with the computer.
When the puncture needle is actually used, the guide wire can penetrate into the mounting seat and the puncture needle body, and the puncture needle body is punctured into a target blood vessel. Meanwhile, an infrared light source is started and infrared light is projected on a puncture part of a patient, reflected infrared light containing subcutaneous vein distribution information is subjected to imaging by a camera, the computer performs real-time enhancement processing on the image, and then the image is projected on the surface of the skin of the patient by a projector, so that subcutaneous vein tracks of an illuminated area are clearly displayed on the skin. So that the medical staff can judge the puncture time conveniently and the puncture precision is improved.
When the puncture needle body reaches a proper position, the puncture needle body simultaneously sends the guide wire to a specified position, so that the guide wire is inserted into a target blood vessel through the puncture needle body. Then the puncture needle body is withdrawn, namely the puncture needle body is withdrawn from the outer side of the guide wire; guiding by using the guide wire, sleeving the guide wire with the catheter, and inserting one end of the catheter into a target blood vessel through the guide wire so that the catheter is arranged at a preset position; and finally, the guide wire is drawn out from the interior of the catheter, so that the catheterization work is completed.
Whole in-process, through near infrared spectroscopy technique, the infrared light is thrown on patient's puncture position, and the formation of image is received by the camera after the reflection of infrared light subcutaneous vein, and the subcutaneous vein orbit of being shone the region is projected by the projecting apparatus to the surface of patient skin, and the medical personnel of being convenient for judge when puncturing, have improved the precision of puncture.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a cross-sectional view of a central catheter introducer needle in accordance with an embodiment of the invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
fig. 3 is a schematic block diagram provided by an embodiment of the present invention.
An icon: 1-mounting a base; 2-puncture needle body; 3-a pressure sensor; 4-a pressure monitoring seat; 5-inserting holes; 6-cushion block; 7-briquetting; 8-screw rod; 9-pressing a plate; 10-a turntable; 11-guide wire.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not require that the components be absolutely horizontal or vertical, but may be slightly inclined. Such as "horizontal" simply means that its orientation is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
Referring to fig. 1-3, fig. 1 is a cross-sectional view of a central catheter introducer needle in accordance with an embodiment of the present invention; FIG. 2 is an enlarged view of FIG. 1 at A; fig. 3 is a schematic block diagram provided in an embodiment of the present invention.
The embodiment provides a central venous catheter puncture needle based on near infrared spectrum and pressure monitoring function, which comprises a mounting seat 1 with a hollow inner part and a puncture needle body 2 arranged on the mounting seat 1, wherein the puncture needle body 2 is communicated with the mounting seat 1; the system also comprises an infrared light source, a camera, a computer and a projector, wherein the infrared light source, the camera and the projector are all electrically connected with the computer.
With the development of optical fiber and sensing technology, the further combination of near infrared spectrum detection technology and computer network technology, the non-invasive qualitative and quantitative analysis of near infrared spectrum technology becomes possible. Meanwhile, different transparent tissues in the organism have different absorption and scattering characteristics on near infrared light, so that the near infrared light has stronger distinguishing capability on different soft tissues and changed tissues. According to the characteristics, certain optical parameters of the tissue can be measured by using the near infrared spectroscopy so as to obtain certain physiological parameters of the tissue, or the relationship between certain physiological parameters and spectral data is established, so that foreign bodies in the tissue can be detected or a two-dimensional image can be generated; changes in skin tissue affected by the external environment can also be monitored; it can also be used for clinical analysis and determination of certain components in blood. The near infrared spectroscopy can directly carry out non-invasive detection on living tissues, so that the research work which cannot be carried out in the past becomes possible, and the analysis and detection efficiency is greatly improved.
In actual use, the guide wire 11 can be inserted into the mounting seat 1 and the puncture needle body 2, and the puncture needle body 2 can be punctured into a target blood vessel. Simultaneously, an infrared light source is started, infrared light is projected to a puncture part of a patient, the infrared light is reflected by subcutaneous veins and then is received by a camera for imaging, the computer performs real-time enhancement processing on the image, and then the image is projected to the surface of the skin of the patient by a projector, so that the subcutaneous vein track of the illuminated area is clearly displayed on the skin. So the medical staff can judge when puncturing, and the puncturing precision is improved.
When the puncture needle body 2 reaches a proper position, the puncture needle body 2 simultaneously feeds the guide wire 11 to a prescribed position so that the guide wire 11 is inserted into the target blood vessel through the puncture needle body 2. Then the puncture needle body 2 is withdrawn, namely the puncture needle body 2 is withdrawn from the outer side of the guide wire 11; guiding by using the guide wire 11, sleeving the guide tube on the guide wire 11, and inserting one end of the guide tube into a target blood vessel through the guide wire 11 so that the guide tube is arranged at a preset position; finally, the guide wire 11 is drawn out from the interior of the catheter, thereby completing the catheterization.
In the whole process, by the near infrared spectrum technology, infrared light is projected on the puncture part of a patient, reflected infrared light containing subcutaneous vein distribution information is imaged by a camera, and the subcutaneous vein track of an illuminated area is projected on the surface of the skin of the patient by a projector, so that medical personnel can judge the puncture precision conveniently.
As shown in fig. 1-3, in some embodiments of the present invention, the above-mentioned device further comprises a pressure monitoring module for monitoring the pressure inside the above-mentioned mounting base 1, and the above-mentioned pressure monitoring module is electrically connected with the above-mentioned computer. The pressure monitoring module comprises a pressure sensor 3 and a pressure monitoring seat 4, the pressure monitoring seat 4 is hollow, and the pressure monitoring seat 4 is arranged on the mounting seat 1 and communicated with the mounting seat 1; the pressure sensor 3 is provided inside the pressure monitoring base 4, and the pressure sensor 3 is electrically connected to the computer.
According to the invention, by arranging the pressure monitoring module, the outer diameter of the guide wire 11 is smaller than the inner diameter of the puncture needle body 2, so that a certain gap is formed between the guide wire 11 and the puncture needle body 2. After the puncture needle body 2 has been inserted into a blood vessel at the time of puncture, blood in the blood vessel can flow into the mounting seat 1 from the space between the guide wire 11 and the puncture needle body 2, and the blood can then flow into the pressure monitoring seat 4 and give a certain pressure to the pressure sensor 3. So the blood pressure when accessible pressure sensor 3 detects the puncture and shows pressure signal transmission to the computer, the medical personnel of being convenient for judge in real time.
In some embodiments of the invention, as shown in fig. 1-3, a sealing seat is provided in the mounting seat 1, and the sealing seat is provided with a through-hole 5. The sealing seat comprises an elastic cushion block 6 and an elastic pressing block 7, the cushion block 6 and the pressing block 7 are arranged at intervals and are arranged on the inner side wall of the mounting seat 1, and the through hole 5 is located between the cushion block 6 and the pressing block 7.
According to the invention, the sealing seat is provided with the through hole 5, so that the guide wire 11 can pass through the through hole 5 when the guide wire 11 is installed. Because the cushion block 6 and the pressing block 7 have elasticity, the guide wire 11 can be extruded through the cushion block 6 and the pressing block 7, on one hand, the sealing performance between the guide wire 11 and the sealing seat can be improved, and blood is prevented from flowing out of the mounting seat 1 during puncture; on the other hand, the cushion block 6 and the pressing block 7 can generate friction force on the guide wire 11, so that the guide wire 11 is prevented from sliding relative to the puncture needle body 2 during puncture, and the stability during puncture is improved. After the puncture is finished, the guide wire 11 is pressed, and the mounting seat 1 and the puncture needle body 2 are pulled out.
As shown in fig. 1 to 3, in some embodiments of the present invention, the cushion block 6 and the pressing block 7 are both made of rubber blocks. According to the invention, the cushion block 6 and the pressing block 7 are both made of rubber blocks, so that the rubber blocks have good elasticity and large friction force, and are convenient for sealing and fixing the guide wire 11.
As shown in fig. 1 to 3, in some embodiments of the present invention, the mounting base 1 is movably provided with a pressing member for pressing the pressing block 7 toward the pad 6, and the pressing member abuts against the pressing block 7.
According to the invention, the extrusion assembly is arranged, so that the pressing block 7 can be extruded towards one side of the cushion block 6 by the extrusion assembly after the guide wire 11 passes through the through hole 5, so that the cushion block 6 and the pressing block 7 can be mutually extruded, the guide wire 11 is convenient to fix, the through hole 5 is also favorably sealed, and the sealing performance is improved.
As shown in fig. 1-3, in some embodiments of the present invention, the pressing assembly includes a screw 8 and a pressing plate 9, and the pressing plate 9 is located in the mounting seat 1 and abuts against the pressing block 7; the mounting seat 1 is provided with a screw hole, the screw 8 passes through the screw hole and is in threaded connection with the mounting seat 1, one end of the screw 8 is connected with the pressing plate 9, and the other end of the screw 8 is positioned outside the mounting seat 1. A rotary disc 10 is arranged at one end of the screw 8 positioned outside the mounting seat 1.
According to the invention, the screw 8 and the pressing plate 9 are arranged, the rotary table 10 can be rotated in such a way, the screw 8 is driven to rotate through the rotary table 10, and the screw 8 is in threaded connection with the mounting seat 1, so that the rotated screw 8 moves along the mounting seat 1 and drives the pressing plate 9 to move, and the pressing plate 9 can be used for conveniently extruding the pressing block 7.
As shown in fig. 1 to 3, in some embodiments of the present invention, the pressing block 7 and the spacer 6 are both arched, the pressing block 7 is hollow, and the pressing plate 9 is located inside the pressing block 7. According to the invention, the pressing block 7 and the cushion block 6 are both arched, and the openings at two ends of the through-insertion hole 5 formed in the way are conical, so that a guide wire 11 can conveniently penetrate through the through-insertion hole.
In summary, the embodiment of the present invention provides a central venous catheter puncture needle based on near infrared spectroscopy and pressure monitoring functions, including a mounting seat 1 with a hollow interior and a puncture needle body 2 disposed on the mounting seat 1, wherein the puncture needle body 2 is communicated with the mounting seat 1; the system also comprises an infrared light source, a camera, a computer and a projector, wherein the infrared light source, the camera and the projector are all electrically connected with the computer.
In actual use, the guide wire 11 can be inserted into the mounting seat 1 and the puncture needle body 2, and the puncture needle body 2 can be punctured into a target blood vessel. Meanwhile, an infrared light source is started and infrared light is projected on a puncture part of a patient, reflected infrared light containing subcutaneous vein distribution information is subjected to imaging by a camera, the computer performs real-time enhancement processing on the image, and then the image is projected on the surface of the skin of the patient by a projector, so that subcutaneous vein tracks of an illuminated area are clearly displayed on the skin. So that the medical staff can judge the puncture time conveniently and the puncture precision is improved.
When the puncture needle body 2 reaches a proper position, the puncture needle body 2 simultaneously feeds the guide wire 11 to a prescribed position so that the guide wire 11 is inserted into the target blood vessel through the puncture needle body 2. Then the puncture needle body 2 is withdrawn, namely the puncture needle body 2 is withdrawn from the outer side of the guide wire 11; guiding by using the guide wire 11, sleeving the guide tube on the guide wire 11, and inserting one end of the guide tube into a target blood vessel through the guide wire 11 so that the guide tube is arranged at a preset position; finally, the guide wire 11 is drawn out from the interior of the catheter, thereby completing the catheterization.
Whole in-process, through near infrared spectroscopy technique, the infrared light is thrown on patient's puncture position, and the formation of image is received by the camera after the reflection of subcutaneous vein to infrared light, and the subcutaneous vein orbit of being shone the region is projected by the projecting apparatus and is judged when being convenient for medical personnel puncture to patient's skin surface, has improved the precision of puncture.
While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not limited to the details of the foregoing illustrative embodiments, and that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Central venous catheter pjncture needle based on near infrared spectrum and pressure monitoring function, its characterized in that: the puncture needle comprises a mounting seat and a puncture needle body, wherein the mounting seat is hollow inside, and the puncture needle body is arranged on the mounting seat and communicated with the mounting seat; the system also comprises an infrared light source, a camera, a computer and a projector, wherein the infrared light source, the camera and the projector are electrically connected with the computer.
2. The central venous catheter puncture needle based on near infrared spectrum and pressure monitoring function according to claim 1, characterized in that: the pressure monitoring module is used for monitoring the internal pressure of the mounting seat and is electrically connected with the computer.
3. The central venous catheter puncture needle based on near infrared spectrum and pressure monitoring function according to claim 2, characterized in that: the pressure monitoring module comprises a pressure sensor and a pressure monitoring seat, the pressure monitoring seat is hollow, and the pressure monitoring seat is arranged on the mounting seat and communicated with the mounting seat; the pressure sensor is arranged in the pressure monitoring seat and electrically connected with the computer.
4. A central venous catheter needle based on near infrared spectroscopy and pressure monitoring functions as claimed in claim 1, wherein: a sealing seat is arranged in the mounting seat, and a through hole is formed in the sealing seat.
5. A central venous catheter puncture needle based on near infrared spectroscopy and pressure monitoring functions according to claim 4, characterized in that: the seal receptacle includes elastic cushion and elastic briquetting, the cushion with the briquetting interval sets up and all locates the mount pad inside wall, the interlude hole is located the cushion with between the briquetting.
6. A central venous catheter puncture needle based on near infrared spectroscopy and pressure monitoring functions according to claim 5, characterized in that: the cushion block and the pressing block are both rubber blocks.
7. The central venous catheter puncture needle based on near infrared spectrum and pressure monitoring function according to claim 5, characterized in that: the mounting seat is movably provided with an extrusion assembly used for extruding the pressing block towards one side of the cushion block, and the extrusion assembly is abutted to the pressing block.
8. A central venous catheter needle based on near infrared spectroscopy and pressure monitoring functions as claimed in claim 7, wherein: the extrusion assembly comprises a screw and a pressing plate, and the pressing plate is positioned in the mounting seat and is abutted to the pressing block; the mounting seat is provided with a screw hole, the screw rod penetrates through the screw hole and is in threaded connection with the mounting seat, one end of the screw rod is connected with the pressing plate, and the other end of the screw rod is located outside the mounting seat.
9. A central venous catheter needle based on near infrared spectroscopy and pressure monitoring functions as claimed in claim 8, wherein: and a turntable is arranged at one end of the screw rod, which is positioned outside the mounting seat.
10. A central venous catheter needle based on near infrared spectroscopy and pressure monitoring functions as claimed in claim 8, wherein: the pressing block and the cushion block are both arched, the pressing block is hollow, and the pressing plate is located inside the pressing block.
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| CN202211289270.XA CN115670605A (en) | 2022-10-20 | 2022-10-20 | Central venous catheter puncture needle based on near infrared spectrum and pressure monitoring function |
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| CN202211289270.XA CN115670605A (en) | 2022-10-20 | 2022-10-20 | Central venous catheter puncture needle based on near infrared spectrum and pressure monitoring function |
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