CN215386888U - Medical guide wire and hollow structural member thereof - Google Patents
Medical guide wire and hollow structural member thereof Download PDFInfo
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- CN215386888U CN215386888U CN202121102217.5U CN202121102217U CN215386888U CN 215386888 U CN215386888 U CN 215386888U CN 202121102217 U CN202121102217 U CN 202121102217U CN 215386888 U CN215386888 U CN 215386888U
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- 210000004351 coronary vessel Anatomy 0.000 description 2
- 230000035487 diastolic blood pressure Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
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- 238000013152 interventional procedure Methods 0.000 description 1
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- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The utility model provides a medical guide wire and a hollow structural member thereof, wherein the hollow structural member comprises an axial hollow structural member body, and the outer diameter of the hollow structural member body is greater than the thickness and the width of a sensor; the hollow structural part body is provided with a through type window, the length of the through type window is greater than that of the sensor, and the width of the through type window is greater than the thickness of the sensor; at least one window is arranged on one side or two sides of the through window of the hollow structural member body. By adopting the technical scheme of the utility model, the production process is simplified, the assembly difficulty of the sensor and the hollow structural member is reduced, the production efficiency is improved, and the measurement accuracy in the use process is improved.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a medical guide wire and a hollow structural member thereof.
Background
The intravascular pressure of a human body is an important physiological parameter, the intravascular pressure is measured in real time at high frequency, parameters such as average pressure, systolic pressure, diastolic pressure, pressure waveform analysis and the like are derived according to measurement data, and the intravascular pressure measurement method has important reference significance for doctors to know pathophysiological conditions such as intravascular stenosis, obstruction and the like of patients and to make further treatment schemes. In the prior art, FFR (fractional flow reserve) and its derived index can be obtained by non-invasive measurement of imaging analysis and real-time measurement of coronary intravascular pressure by invasive pressure of interventional means. The non-invasive measurement mode obtains the pressure of each part in the blood vessel through fluid mechanics modeling analysis according to the blood flow speed displayed by the intravascular intensifier in CT or MRI, and the accuracy of the mode at present can not be compared with the invasive measurement mode and can not be widely applied. Therefore, invasive pressure measurement via interventional procedures remains the current standard clinical procedure.
Invasive pressure measurement is performed by means of interventional surgery, namely, a guide wire loaded with a pressure sensor is pushed to a coronary artery with measurement under the guidance of DSA (digital signal processor) by puncturing a blood vessel such as a radial artery, a measurement signal of the pressure sensor is acquired by a rear-end acquisition circuit, and is subjected to amplification, filtering, AD (analog-to-digital) conversion and other processing, and finally the average pressure, systolic pressure and diastolic pressure of a measurement section in the coronary artery are acquired by a specific algorithm, so that parameter values such as FFR (fringe field Ring reflection), iFR (intrinsic fall) and RFR (radiofrequency reflection) can be calculated. Invasive pressure tests need to be introduced through guide wires, and the structure of the guide wires is mainly divided into three parts: the flexible spring wire of distalmost end, hollow structure spare and near-end push rod. The sensor is arranged in the hollow structural member, and pressure signals are transmitted through a flat cable (MEMS pressure sensor) or an optical fiber (optical fiber pressure sensor). When the pressure guide wire is placed in a blood vessel, the hollow structural member for placing the sensor needs to be provided with a window on the tube wall, so that the pressure can be transmitted to the sensor for pressure measurement. In the traditional structure, a small window is arranged on a hollow structural member, and a sensor is placed in a tube cavity. However, the structure size is small (the outer diameter is usually 0.36 mm), the sensor needs to be fed from one end of the hollow structural member when the guide wire is assembled, so that the size of the sensor is required to be safely matched with the inner cavity of the hollow structural member, and the processing difficulty of the sensor and the hollow structural member is greatly improved. Meanwhile, when a clinical operation is performed, the sensor needs to be windowed to transfer air to be completely emptied, and due to the small windowing size, air bubbles are easy to remain on the surface of the sensor, so that the pressure measurement is inaccurate. If the number of windows is increased on the hollow structural member, the sensor still needs to be fed from one end of the hollow structural member when the sensor is assembled, so that the size of the sensor is required to be smaller than the inner diameter of the hollow structural member, and the assembly and production difficulty is still high.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problem, the utility model discloses a medical guide wire and a hollow structural member thereof, wherein the matching constraint relation between the inner diameter of the hollow structure and the size of a sensor is removed by designing the windowing form of the hollow structural member, the assembly difficulty of the sensor and the hollow structural member is reduced, the production process is simplified, and the production efficiency is improved.
In contrast, the technical scheme of the utility model is as follows:
a hollow structural member of a medical guide wire comprises an axial hollow structural member body, wherein the outer diameter of the hollow structural member body is larger than the thickness and the width of a sensor; the hollow structural part body is provided with a through type window, the length of the through type window is greater than that of the sensor, and the width of the through type window is greater than the thickness of the sensor; at least one window is arranged on one side or two sides of the through window of the hollow structural member body.
By adopting the technical scheme, the sensor is inserted into the middle vacant position in the hollow structural part body through the through type window opening, and then is fixedly connected with the hollow structural part body, so that the sensor is convenient to process and install. By through-opening the hollow structural member can accommodate sensors of as large a size as possible while still preserving the structural rigidity of the hollow structural member. In addition, the through type window in the technical scheme is symmetrical, the window which is positioned on one side or two sides of the through type window is used for corresponding to the sensing part of the sensor, so that liquid signals around the hollow structural member can be better transmitted into the sensor loaded in the through type window for measurement, in addition, the through type window and the window which is positioned on one side or two sides of the through type window can form a liquid flow channel, the residue of air bubbles in gaps can be better reduced, and the measurement accuracy is improved.
As a further improvement of the utility model, the inner wall of the hollow structural part body is provided with a fixing component or is connected with the sensor through an adhesive. Wherein the fixing member is used for fixing the sensor. As a further improvement of the utility model, the fixing component is a clamping position or a clamping and connecting piece.
As a further improvement of the present invention, the hollow structural member is made of metal or polymer material.
As a further improvement of the utility model, the outer diameter of the hollow structural member is 0.014-0.038 inches.
As a further improvement of the present invention, the normal direction of the window is perpendicular to the normal direction of the through window.
The utility model also discloses a medical guide wire which comprises a sensor and the hollow structural member of the medical guide wire, wherein the sensor is positioned in the hollow structural member body and faces the window, and the sensor is fixedly connected with the inner wall of the hollow structural member body. One end of the hollow structural member is connected with the spring wire at the farthest end, and the other end of the hollow structural member is connected with the near-end pushing rod.
As a further improvement of the utility model, the sensor is fixedly connected with the inner wall of the hollow structural member body through a clamping piece or adhesive.
As a further improvement of the utility model, the sensor is fixedly connected with the inner wall of the hollow structural member body through a gasket.
Compared with the prior art, this use neotype beneficial effect does:
firstly, by adopting the technical scheme of the utility model, the sensor is not required to be placed through one end of the hollow structural member, only needs to be inserted into the middle vacant position in the hollow structural member body through the penetrating window and then is fixedly connected with the hollow structural member body, so that the sensor is not required to be completely accommodated in the inner cavity of the hollow structural member, and only needs to be accommodated within the outer diameter range of the hollow structural member. The matching restriction relation between the inner diameter of the hollow structure and the size of the sensor is converted into the matching restriction relation between the outer diameter of the hollow structure and the size of the sensor, the size of the sensor is allowed to be as large as possible on the premise of not exceeding the outline of the hollow structural member, the production process is simplified, and the production efficiency is improved.
Secondly, by adopting the technical scheme of the utility model, the sensor is assembled to be arranged from a symmetrical and penetrating window, so that the assembly operation that the sensor penetrates through the inner cavity of the hollow structural member is avoided, the operation process can be completely visible under a microscope, the possibility of directly contacting the surface of the sensor and even damaging the sensor is reduced, and the assembly difficulty of the sensor and the hollow structural member is reduced.
Thirdly, by adopting the technical scheme of the utility model, the hollow structural part is windowed over the sensor so as to facilitate pressure sensing, a liquid flow channel is formed by the upper windowed window and the two side penetrating windows, liquid is better filled in the gap, the possibility of existence of bubbles is reduced, and the measurement accuracy in the use process is improved.
Drawings
Fig. 1 is a schematic structural view of a hollow structural member of a medical guidewire according to embodiment 1 of the present invention.
Fig. 2 is a schematic view of a mounted sensor of embodiment 1 of the present invention.
Fig. 3 is a schematic view of a sensor-equipped structure according to embodiment 1 of the present invention.
Fig. 4 is a schematic sectional view showing the internal structure of a hollow structural member with a sensor fixed thereto according to embodiment 1 of the present invention.
Fig. 5 is a side view of a hollow structural member with a sensor fixed thereto according to embodiment 1 of the present invention.
Fig. 6 is a schematic sectional view showing the internal structure of a hollow structural member to which a sensor is fixed according to embodiment 2 of the present invention.
Fig. 7 is a side view of a hollow structural member with a sensor fixed thereto according to embodiment 2 of the present invention.
The reference numerals include:
1-hollow structural member body, 2-penetrating type window opening, 3-window opening, 4-sensor and 5-clamping position.
Detailed Description
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 4, a hollow structural member of a medical guide wire includes an axial hollow structural member body 1, and an outer diameter of the hollow structural member body 1 is larger than a thickness and a width of a sensor 4; the hollow structural part body 1 is provided with a through type window 2, the length of the through type window 2 is greater than that of the sensor 4, and the width of the through type window 2 is greater than that of the sensor 4; at least one window 3 is arranged on one side or two sides of the through window 2 of the hollow structural member body 1. The normal direction of one of the windows 3 is perpendicular to the normal direction of the through window 2.
In this embodiment, the maximum outer diameter of the hollow structural member is between 0.014 inch and 0.038 inch, the hollow structural member is divided into a proximal end and a distal end, the proximal end is connected to the push rod, and the distal end is connected to the spring. As shown in fig. 1, the two side walls of the hollow structural member are centrally perforated and symmetrically windowed 3, and the size of the windowed 3 is minimum larger than the side area of the sensor 4 to be loaded; a small window is arranged right above the far end of the hollow structural part, and the sensor 4 is right opposite to the window, so that the pressure conduction during the use is convenient to measure; the hollow structural member can be made of metal or high molecular polymer.
During installation, a sensor 4 with a communication line is welded, the communication line is firstly placed in a through window 2 on the side wall of the hollow structural member and then penetrates out of the inner cavity of the hollow structural member from the proximal direction, after the communication line passes through the proximal end of the hollow structural member in full length, the sensor 4 is placed in the through window 2 on the side wall, the effective measuring area of the sensor 4 is adjusted to be right opposite to the window 3 above the distal end of the hollow structural member, so that the sensor 4 does not protrude out of the outer contour of the hollow structural member body 1, and then the sensor 4 is fixed by a gasket or a clamping block 5 through plugging the window of the hollow structural member body 1, as can be seen from the sectional views of the hollow structural member shown in fig. 4 and 5, the sensor 4 is fixed by the clamping block 5. After the hollow structural member is loaded on the guide wire, a through structure is formed at the position of the sensor 4, so that liquid can better flow in surrounding gaps and surfaces when the hollow structural member is used, and further bubble-free filling is realized, and the pressure measurement is more accurate.
By adopting the technical scheme of the embodiment, the problem that the processing difficulty is improved because the size of the sensor needs to be completely matched with the size of the inner cavity of the hollow structural part in the prior art is solved, and the problem that the pressure is inaccurate because the window of the existing hollow structural part is small and liquid is difficult to completely fill the gap is also solved.
Example 2
As shown in fig. 6 and 7, the difference between the embodiment 1 and the embodiment 1 is that the sensor 4 is adhered to the platform of the through window 2 of the hollow structural member body 1 by glue.
Example 3
A medical guide wire comprises a push rod, a sensor and a hollow structural member of the medical guide wire as in embodiment 1 or embodiment 2, wherein the sensor is located in the hollow structural member body and faces towards a window, and the sensor is fixedly connected with the inner wall of the hollow structural member body. One end of the hollow structural member is connected with the spring at the farthest end, and the other end of the hollow structural member is connected with the near-end pushing rod.
The above-mentioned embodiments are preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and the equivalent changes in shape and structure according to the present invention are within the protection scope of the present invention.
Claims (9)
1. A hollow structural member of a medical guide wire is characterized in that: the sensor comprises an axial hollow structural part body, wherein the outer diameter of the hollow structural part body is larger than the thickness and the width of the sensor; the hollow structural part body is provided with a through type window, the length of the through type window is greater than that of the sensor, and the width of the through type window is greater than the thickness of the sensor; at least one window is arranged on one side or two sides of the through window of the hollow structural member body.
2. The hollow structural member of a medical guidewire according to claim 1, wherein: the inner wall of the hollow structural part body is provided with a fixing component or is connected with the sensor through an adhesive.
3. The hollow structural member of a medical guidewire according to claim 2, wherein: the fixing component is a clamping position or a clamping part.
4. The hollow structural member of a medical guidewire according to claim 1, wherein: the hollow structural member is made of metal or high polymer material.
5. The hollow structural member of a medical guidewire according to claim 1, wherein: the outer diameter of the hollow structural part is 0.014-0.038 inches.
6. The hollow structural member of the medical guide wire according to any one of claims 1 to 5, wherein: the normal direction of the window is vertical to the normal direction of the through window.
7. A medical guidewire, characterized by: the medical guide wire comprises a sensor and a hollow structural member of the medical guide wire according to any one of claims 1 to 6, wherein the sensor is positioned in the hollow structural member body and faces towards the window, and the sensor is fixedly connected with the inner wall of the hollow structural member body.
8. The medical guidewire of claim 7, wherein: the sensor is fixedly connected with the inner wall of the hollow structural member body through a clamping piece or an adhesive.
9. The medical guidewire of claim 7, wherein: the sensor is fixedly connected with the inner wall of the hollow structural member body through a gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121102217.5U CN215386888U (en) | 2021-05-21 | 2021-05-21 | Medical guide wire and hollow structural member thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121102217.5U CN215386888U (en) | 2021-05-21 | 2021-05-21 | Medical guide wire and hollow structural member thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215386888U true CN215386888U (en) | 2022-01-04 |
Family
ID=79676176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121102217.5U Active CN215386888U (en) | 2021-05-21 | 2021-05-21 | Medical guide wire and hollow structural member thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215386888U (en) |
-
2021
- 2021-05-21 CN CN202121102217.5U patent/CN215386888U/en active Active
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