CN113827210A - Guide wire, signal receiving device and intravascular pressure measuring structure - Google Patents
Guide wire, signal receiving device and intravascular pressure measuring structure Download PDFInfo
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- CN113827210A CN113827210A CN202111417326.0A CN202111417326A CN113827210A CN 113827210 A CN113827210 A CN 113827210A CN 202111417326 A CN202111417326 A CN 202111417326A CN 113827210 A CN113827210 A CN 113827210A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
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Abstract
The invention provides a guide wire for measuring intravascular pressure, a signal receiving device and an intravascular pressure measuring structure, wherein the guide wire and the signal receiving device are designed in a separable mode, and when the guide wire and the signal receiving device are matched for use, the near end of the guide wire can be embedded into the signal receiving device, so that the guide wire can be stably connected with the signal receiving device by designing a smaller outer diameter, a catheter can be withdrawn from the guide wire, or the catheter can be exchanged on the premise of not withdrawing the guide wire, and the guide wire is more conveniently suitable for tortuous or distant blood vessels, so that the application range is wider; in addition, the guide wire is provided with a plurality of through grooves penetrating through the side wall, and due to the design of the through grooves, the guide wire has better torsion control performance and flexibility and is more suitable for intracranial lesions; the signal receiving unit of the signal receiving device realizes circumferential rotation along the cavity through the rotating unit, so that an operator can infinitely rotate the guide wire in one direction without worrying about knotting of the signal transmission wire, and the operation convenience is improved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a guide wire, a signal receiving device and an intravascular pressure measuring structure.
Background
Referring to fig. 1, Fractional Flow Reserve (FFR) refers to the ratio of the maximum blood flow obtained from the myocardial region of the blood vessel in the presence of stenotic lesion to the maximum blood flow obtained from the same region under the theoretically normal condition, i.e. the ratio of the mean pressure in the stenotic distal artery (Pd) to the mean pressure in the aorta at the mouth of the artery (Pa) in the maximal hyperemia state of the myocardium, and when the FFR ratio is less than 0.8, it can be determined that interventional surgical intervention is needed.
The current FFR measurement technology is mainly used for coronary artery, and no corresponding product exists in the field of nerve intervention. The reason is mainly that the blood vessels of the coronary artery are crotch-shaped, and intracranial vascular diseases are mostly presented in series and are far in the way, so that the pressure measurement guide wire is difficult to reach the pathological change position of the intracranial blood vessels through layer-by-layer obstruction.
Intracranial blood vessels are narrow and tortuous, and the function of exchanging and using various instruments is more emphasized. Guide wires conventionally used in the cranium can be used as exchange guide wires, allowing for withdrawal and replacement of other instruments, such as withdrawal or replacement of microcatheters, balloons, preloaded stents, etc.; the rear end of the current pressure guide wire is provided with a connecting block, so that the functions cannot be realized.
Disclosure of Invention
The invention aims to solve the problem that an intravascular pressure measurement guide wire cannot be applied to the field of nerve intervention.
In order to solve the above technical problem, the present invention provides a guide wire for intravascular pressure measurement, the guide wire being used in cooperation with a signal receiving device, the guide wire comprising: a guidewire body and a measurement assembly, wherein,
the guide wire body comprises a first part and a second part, the distal end of the first part is connected with the second part, and the proximal end of the first part is detachably embedded in the signal receiving device; the second part is provided with a plurality of through grooves which are arranged along the radial direction and penetrate through the side wall of the second part;
the pressure sensing unit is arranged in the second part, one or more through grooves form a sensing window of the pressure sensing unit, the sensing window exposes part of the pressure sensing unit, the signal transmission unit penetrates through the guide wire body, one end of the signal transmission unit is connected with the pressure sensing unit, and the other end of the signal transmission unit extends to the near end of the first part along the axial direction of the guide wire body.
Optionally, in the guide wire, the second portion has at least one through groove group, each through groove group includes a plurality of through grooves, and the plurality of through grooves are arranged spirally around the axis of the second portion, or the plurality of through grooves of each through groove group are arranged in parallel along the axis of the second portion.
Optionally, in the guide wire, when the second portion has a plurality of the channel groups, the channel groups are not intersected with each other.
Optionally, in the guide wire, an angle between an extending direction of the through groove and an axis of the second portion is 0 ° to 90 °.
Optionally, in the guide wire, the guide wire further includes a limiting unit, and the limiting unit is convexly disposed on an inner wall of the guide wire body and is used for maintaining an interval between the signal transmission unit and the guide wire body.
Optionally, in the guide wire, the limiting unit includes a first limiting member and a second limiting member for the signal transmission unit to penetrate through, the first limiting member is disposed on the first portion, and the second limiting member is disposed on the second portion.
Optionally, in the guide wire, the limiting unit and the guide wire body are integrally formed.
Optionally, in the guide wire, an opening angle of the sensing window is not greater than 160 °.
Optionally, in the guide wire, the guide wire body includes a circular arc-shaped bulb, and the circular arc-shaped bulb is connected with the distal end of the second portion.
Optionally, in the guide wire, the pressure sensing unit is an optical fiber pressure sensor, and the signal transmission unit is an optical fiber.
Optionally, in the guide wire, the pressure sensing unit is a resistance-type pressure sensor, and the signal transmission unit is a wire.
In order to solve the above problem, the present invention also provides a signal receiving device used in cooperation with a guidewire for intravascular pressure measurement, including: the device comprises a shell, a signal receiving unit, a fixing unit and a rotating unit; wherein the content of the first and second substances,
the shell is provided with a cavity, the cavity is provided with two axially-penetrating ends, one end of the cavity is used for the guide wire to be inserted, and the other end of the cavity is used for the signal receiving unit arranged in the cavity to penetrate out;
the signal receiving unit is used for receiving a detection signal from the guide wire;
the fixing unit is sleeved on the signal receiving unit and used for fixing the position of the signal receiving unit in the cavity, and the fixing unit is connected with the inner wall of the shell through the rotating unit;
the rotation unit has a degree of freedom to rotate along an axis of the cavity.
Optionally, in the signal receiving device, the rotating unit includes a ball.
Optionally, in the signal receiving apparatus, the signal receiving unit is an optical fiber that receives an optical energy signal.
Optionally, in the signal receiving apparatus, the signal receiving unit includes a resistor circuit including three resistors.
The present invention also provides an intravascular pressure measurement structure, including: the guide wire as described above and the signal receiving device as described above, wherein the signal receiving unit of the signal receiving device receives a test signal of the pressure sensing unit of the guide wire.
Compared with the prior art, the guide wire, the signal receiving device and the intravascular pressure measuring structure provided by the invention have the following advantages:
(1) the guide wire and the signal receiving device are designed in a separable mode, when the guide wire and the signal receiving device are used in a matched mode, the near end of the guide wire can be embedded into the signal receiving device, and therefore the guide wire can be stably connected with the signal receiving device due to the small outer diameter, a catheter can be withdrawn from the guide wire, or the catheter can be exchanged on the premise that the guide wire is not withdrawn, so that the guide wire is more conveniently suitable for tortuous or far-section blood vessels, and the application range is wider;
(2) the guide wire provided by the invention is provided with a plurality of through grooves penetrating through the side wall, and the design of the through grooves ensures that the measuring guide wire has better torsion control performance and flexibility and is more suitable for intracranial lesions;
(3) according to the signal receiving device provided by the invention, the signal receiving unit realizes circumferential rotation along the cavity through the rotating unit, so that an operator can infinitely rotate the guide wire in one direction without worrying about knotting of the signal transmission wire, and the operation convenience is improved.
Drawings
FIG. 1 is a schematic view of a pressure measurement state of a guidewire in a blood vessel;
FIG. 2 is a schematic structural diagram of a guidewire provided in accordance with an embodiment of the present invention;
fig. 3 is a schematic view of a state in which a guide wire provided by an embodiment of the invention is used with a signal receiving device;
FIG. 4 is a schematic view of a catheter in use with a guidewire in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a through slot arrangement of a guidewire body in an embodiment of the invention;
FIG. 6 is a schematic diagram of a fixing unit according to an embodiment of the present invention;
FIG. 7 is a schematic view illustrating an open angle of a sensing window according to an embodiment of the present invention;
FIG. 8 illustrates an exemplary pressure measurement in accordance with an embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating a relationship between changes of optical signals in a pressure measurement method according to an embodiment of the present invention;
FIG. 10 illustrates another exemplary pressure measurement mode of an embodiment of the present invention;
wherein the reference numerals are as follows:
1-a first part; 2-a second part; 3-distal end of the second portion; 4-through groove; 5-a pressure sensing unit; 6-a sensing window; 7-arc ball head; 8-a signal transfer unit; 10-a catheter;
801-a first limit stop; 802-a second stop;
3 a-an optical fiber;
501 a-a sleeve; 502 a-film; 503 a-proximal side;
505 a-a second reflected light wave; 506 a-first reflected light wave; 507 a-superposition of light waves;
3 b-a wire;
501 b-pressure strain resistance; 502 b-resistance;
901-a housing; 902-a rotation unit; 903-a fixing unit; 904-signal receiving unit.
Detailed Description
To make the objects, advantages and features of the present invention more apparent, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently. It should be further understood that the terms "first," "second," "third," and the like in the description are used for distinguishing between various components, elements, steps, and the like, and are not intended to imply a logical or sequential relationship between various components, elements, steps, or the like, unless otherwise indicated or indicated.
The embodiment of the invention provides a guide wire for intravascular pressure measurement, which is matched with a signal receiving device for use, and comprises: the guidewire body and the measurement component.
Referring to fig. 2 in combination with fig. 3, the guidewire body comprises a first portion 1 and a second portion 2, a distal end of the first portion 1 is connected to the second portion 2, and a proximal end of the first portion 1 is detachably embedded in the signal receiving device; the second portion 2 has a plurality of through slots 4 through the side walls;
the measuring component comprises a pressure sensing unit 5 and a signal transmission unit 8, wherein the pressure sensing unit 5 is arranged in the second part 2, one or more through grooves 4 form a sensing window 6 of the pressure sensing unit 5, the sensing window 6 exposes a part of the pressure sensing unit 5, the signal transmission unit 8 is arranged in the guide wire body in a penetrating mode, one end of the signal transmission unit is connected with the pressure sensing unit 5, and the other end of the signal transmission unit extends to the near end of the first part 1 along the axial direction of the guide wire body. In some embodiments, the proximal end of the signal transfer element 8 may extend and protrude beyond the proximal most section of the first portion 1; in some embodiments, the proximal end of the signal transfer element 8 may extend to the proximal end of the first part 1 and be located inside the first part 1; in some embodiments, the proximal end of the signal transfer element 8 may extend to and be flush with the proximal most section of the first part 1.
The guide wire provided by the embodiment of the invention has the advantages that the proximal end of the guide wire is detachably embedded into the signal receiving device, the guide wire can be stably connected with the signal receiving device due to the small outer diameter, and the catheter can be withdrawn from the guide wire due to the separation of the proximal end of the guide wire from the signal receiving device or can be exchanged on the premise of not withdrawing the guide wire, so that the guide wire can more easily pass through a long-section narrow tissue and is more conveniently suitable for tortuous or far-section blood vessels, and the application range is wider. In addition, the guide wire provided by the embodiment of the invention is provided with a plurality of through grooves 4 penetrating through the side wall, and due to the design of the through grooves 4, the guide wire has better torsion control performance and flexibility and is more suitable for intracranial lesions.
In this embodiment, the guide wire may be detachably connected to the signal receiving device by a plug-in connection.
With continued reference to fig. 3, since the proximal end of the guide wire body is connected with the distal end of the signal receiving device in a plug-in manner, that is, the proximal end (shown as the first portion 8) of the guide wire body corresponds to the plug, and the distal end of the signal receiving device corresponds to the socket, the guide wire provided by the present invention defines that after the guide wire is pulled out of the signal receiving device, the outer diameters of the respective portions are the same, for example, 1 Fr or 0.0014inch, that is, the outer diameters of the respective portions of the guide wire are smaller than the inner diameter of the catheter 10 sleeved on the guide wire, and after the guide wire is used to measure the intravascular pressure, and the guide wire is in place under the fit of the catheter 10, the proximal portion of the guide wire does not restrict the movement of the catheter 10 when the catheter 10 is withdrawn in the withdrawal direction shown in fig. 4.
In other embodiments, the guide wire can be detachably connected with the signal receiving device through a threaded connection, the proximal end of the guide wire is provided with an external thread, the through hole of the signal receiving device is provided with an internal thread, and the guide wire or the signal receiving device can be connected and separated through screwing; or the near end of the guide wire has certain elastic deformation, and after the guide wire is inserted into the signal receiving device through extrusion, tight fit is realized due to elastic tension.
In some other embodiments, the proximal end of the guidewire is slightly larger than the distal section of the guidewire after the guidewire is withdrawn from the signal receiving device; or after the guide wire is pulled out of the signal receiving device, the proximal end of the guide wire is slightly smaller than the distal section of the guide wire. In general, the guidewire may be used to deliver, withdraw, exchange catheters or other medical devices after withdrawal of the signal receiving device, or may be in place with the catheter in place.
Preferably, referring to fig. 3, in the present embodiment, the second portion 2 has at least one through groove set, each through groove set includes a plurality of through grooves 4, and the plurality of through grooves 4 of each through groove set are arranged spirally around the axis of the second portion 2. When a plurality of through grooves 4 of each through groove group are spirally arranged, the second part has good flexibility.
The number of sets of channels provided in the second portion 2 may be adapted to the application, for example, a smaller number of sets may be provided when applied to coronary vessels, and a relatively larger number of sets may be provided when applied to intracranial vessels, to further improve compliance.
Further preferably, with continuing reference to fig. 5, when the second portion 2 has a plurality of through groove sets, the through groove sets do not intersect with each other, that is, the through groove sets extend in the same spiral direction and are parallel to each other in a free state.
In other embodiments, the through grooves of each through groove group are arranged in parallel along the second part axis, or the through groove 4 may also be designed like a snake bone tube or a hypotube, which is not limited in this application.
The shape of each through groove (specifically, the cross-sectional shape of the through groove) is not limited, for example, the through groove may be rectangular, circular, square, or the like, and may be specifically set according to the shape of the pressure sensor or the mechanical property requirement of the guide wire. In order to reduce the process difficulty, the through groove is preferably arranged to be a long strip shape, and the angle between the extending direction of the long strip-shaped through groove and the axis of the second part can be 0-90 degrees.
Preferably, referring to fig. 2, the second portion 2 has a rounded bulb 7, the rounded bulb 7 is connected to the distal end 3 of the second portion 2, and the rounded bulb 7 is designed to avoid puncturing blood vessels. In addition, in order to ensure the flexibility of the guide wire, the position of the pressure sensing unit 5 in the guide wire body should be kept at a certain distance from the distal end 3 of the guide wire body.
Preferably, the guide wire provided by this embodiment further includes a limiting unit, and the limiting unit is convexly disposed on the inner wall of the guide wire body and is configured to maintain an interval between the signal transmission unit 8 and the guide wire body, so as to reduce a distortion degree of signal transmission. Further preferably, referring to fig. 6, the limiting unit includes a first limiting member 801 and a second limiting member 802 for the signal transmission unit 8 to pass through, the first limiting member 801 is disposed on the first portion 1, and the second limiting member 802 is disposed on the second portion 2. That is, the signal transmission unit 8 is fixed in two stages, and thus, while the interval between the signal transmission unit 8 and the inner wall of the guide wire body is ensured, parts with smaller area can be contacted with the signal transmission unit 8, so that the distortion degree of signal transmission of the signal transmission unit 8 is reduced to the minimum.
In order to reduce the process difficulty, optionally, the limiting unit and the guide wire body are integrally formed. In other embodiments, the limiting unit can also be separately connected to the inner wall of the guide wire body, and the specific existence form of the limiting unit does not limit the application.
In this embodiment, the pressure sensing unit 5 may be snapped into the second portion 2 through the through slot 4 constituting the sensing window 6, and an upper surface of the pressure sensing unit 5 may be flush with an outer surface of the second portion 2, or an upper surface of the pressure sensing unit 5 does not exceed the outer surface of the second portion 2. In other embodiments, the pressure sensing unit 5 is disposed in the second portion 2 and partially exposed to the through slot 4; alternatively still, the pressure sensing unit 5 is completely exposed to the through slot and does not snap into the through slot. Referring to fig. 7, in the present embodiment, the opening angle Ɵ of the sensing window 6 is preferably not greater than 160 °. It should be understood that the opening angle Ɵ is an angle formed by the two side walls which are inclined from the top to the bottom of the through slot 4 corresponding to the sensing window 6 and the extension lines of which intersect each other. When the opening angle of the sensing window 6 is not more than 160 °, the pressure sensing unit 5 can be stably clamped in the guide wire body while the pressure sensing unit 5 can accurately sense pressure changes.
In the present embodiment, the measurement assembly is exemplified below.
Example 1
The pressure sensing unit 5 is an optical fiber pressure sensor, and the signal transmission unit 8 is an optical fiber 3 a. Specifically, referring to fig. 8 in conjunction with fig. 9, the optical fiber pressure sensor is a sleeve 501a made of quartz, the farthest end of the sleeve 501a is a film 502a, and the optical fiber 3a can be welded to the sleeve 501a through a welding point. When the original light wave is transmitted to the sleeve through the optical fiber, a first reflection is accomplished at the proximal end 503a of the sleeve, with a fiber to blood reflectance of 4%, resulting in a first reflected light wave 506 a. The second reflected light wave of the original light wave at the distal end side of the sleeve (i.e. membrane 502 a) is 505a, and the two reflected light waves 505a and 506a are superimposed to form a superimposed light wave 507 a. When the distal end surface of the sleeve deforms due to external pressure, the distance between the distal end side and the proximal end side (502 a and 503 a) of the sleeve changes, so that the phase angle of the reflected light waves 505a and 506a changes, the energy of the light waves changes, and after the energy of the light waves is received by the optical fiber for receiving signals, the change of the energy of the light waves is detected through external detection equipment, and then the change of the blood pressure can be obtained.
Example two
The pressure sensing unit 5 is a resistance type pressure sensor, and the signal transmission unit 8 is a lead 3 b. Specifically, referring to fig. 10, the resistance pressure sensor employs a pressure strain resistor 501b, and the pressure strain resistor 501b is disposed inside the guide wire, so that when the external pressure of the guide wire increases, the resistance of the pressure strain resistor 501b increases. The signal receiving device has three resistors 502b, and the resistance of each resistor 502b is equal to 501b plus the resistance of two wires 3 b. When the pressure is 0, the voltage difference measured at the point a shown in the figure is also 0, and when the resistance value of the resistor 501b changes, the voltage measured at the point a shown in the figure also changes, and the corresponding value can be read through the pressure gauge.
The embodiment of the invention also provides a signal receiving device, which is matched with the guide wire for measuring the intravascular pressure. The guide wire can be the guide wire provided in the embodiment, and can also be other guide wires in the prior art.
Referring to fig. 3, the signal receiving apparatus includes: a housing 901, a signal receiving unit 904, a fixing unit 903, and a rotating unit 902; wherein the content of the first and second substances,
the housing 901 has a cavity, and the cavity has two ends penetrating along the axial direction, wherein one end is used for inserting the guide wire, and the other end is used for allowing the signal receiving unit 904 arranged in the cavity to penetrate out;
the signal receiving unit 904 is configured to receive a detection signal from the guide wire;
the fixing unit 903 is sleeved on the signal receiving unit 904 and is used for fixing the position of the signal receiving unit 904 in the cavity, and the fixing unit 903 is connected with the inner wall of the housing 901 through the rotating unit 902;
the turning unit 902 has a degree of freedom to rotate along the axis of the cavity.
In the signal receiving device provided by the embodiment of the invention, the signal receiving unit 904 realizes the circumferential rotation along the cavity through the rotating unit 902, so that after the guide wire is matched with the signal receiving device for use and is inserted into the signal receiving device, an operator can rotate the guide wire without worrying about the knotting of a signal transmission wire of the signal receiving device, and the operation convenience is improved.
The rotation unit 902 may be, for example, a ball, a needle roller, etc., but the present application is not limited thereto, and other rotation structures that can achieve the rotation of the guide wire without the signal receiving device are within the scope of the present application. When the rotating unit 902 adopts a needle roller, the needle roller is arranged along the axial direction of the cavity.
In this embodiment, the signal receiving unit 904 is an optical fiber for receiving a light wave energy signal, and is configured to receive the light wave energy signal of the optical fiber pressure sensor.
In some other embodiments, referring to fig. 10, the signal receiving unit 904 includes a resistor circuit composed of three resistors 502b, and the voltage difference at the point a of the resistor circuit is changed according to the change of the resistance of the resistive pressure sensor.
An embodiment of the present invention further provides an intravascular pressure measurement structure, including: the guide wire provided in this embodiment and the signal receiving device provided in this embodiment, wherein the signal receiving unit 904 of the signal receiving device receives a test signal of the pressure sensing unit 5 of the guide wire.
For the detailed composition and functions of the guide wire and the signal receiving device in the intravascular pressure measurement structure, please refer to the foregoing, which is not described herein again.
In summary, the guide wire, the signal receiving device and the intravascular pressure measurement structure for intravascular pressure measurement provided by the invention are designed in a separable manner, and when the guide wire and the signal receiving device are used in a matched manner, the proximal end of the guide wire can be embedded into the signal receiving device, so that the guide wire can be stably connected with the signal receiving device by designing a smaller outer diameter, so that a catheter can be withdrawn from the guide wire, or the catheter can be exchanged without withdrawing the guide wire, so that the guide wire is more conveniently applicable to tortuous or distant blood vessels, and the application range is wider; in addition, the guide wire is provided with a plurality of through grooves which are arranged along the radial direction and penetrate through the side wall, and due to the design of the through grooves, the guide wire has better torsion control performance and flexibility and is more suitable for intracranial lesions; the signal receiving unit of the signal receiving device realizes circumferential rotation along the cavity through the rotating unit, so that an operator can infinitely rotate the guide wire in one direction without worrying about knotting of the signal transmission wire, and the operation convenience is improved.
It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the protection scope of the technical solution of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (16)
1. A guidewire for intravascular pressure measurement, the guidewire for use with a signal receiving device, the guidewire comprising: a guidewire body and a measurement assembly, wherein,
the guide wire body comprises a first part and a second part, the distal end of the first part is connected with the second part, and the proximal end of the first part is detachably embedded in the signal receiving device; the second part is provided with a plurality of through grooves penetrating through the side wall of the second part;
the pressure sensing unit is arranged in the second part, one or more through grooves form a sensing window of the pressure sensing unit, the sensing window exposes part of the pressure sensing unit, the signal transmission unit penetrates through the guide wire body, one end of the signal transmission unit is connected with the pressure sensing unit, and the other end of the signal transmission unit extends to the near end of the first part along the axial direction of the guide wire body.
2. The guidewire of claim 1, wherein the second portion has at least one channel set, each channel set comprising a plurality of the channels, the plurality of channels of each channel set being arranged helically about the axis of the second portion or the plurality of channels of each channel set being arranged in parallel along the axis of the second portion.
3. The guidewire of claim 2, wherein when the second portion has a plurality of said sets of channels, the plurality of said sets of channels do not intersect one another.
4. The guidewire of claim 2 or 3, wherein the through slot is elongate and the through slot extends at an angle of 0 ° to 90 ° to the axis of the second portion.
5. The guide wire of claim 1, further comprising a stopper unit provided to protrude from an inner wall of the guide wire body for maintaining a space between the signal transmission unit and the guide wire body.
6. The guide wire of claim 5, wherein the limiting unit comprises a first limiting member and a second limiting member, the first limiting member and the second limiting member are respectively disposed on the first portion and the second portion, and the first limiting member and the second limiting member are respectively disposed on the first portion and the second portion.
7. The guidewire of claim 5 or 6, wherein the stop unit is integrally formed with the guidewire body.
8. The guidewire of claim 1, wherein the sensing window has an open angle of no greater than 160 °.
9. The guidewire of claim 1, wherein the guidewire includes a rounded bulb connected to a distal end of the second portion.
10. The guidewire of claim 1, wherein the pressure sensing unit is a fiber optic pressure sensor and the signal transmitting unit is an optical fiber.
11. The guidewire of claim 1, wherein the pressure sensing unit is a resistive pressure sensor and the signal transmitting unit is a wire.
12. A signal receiving device for use with a guidewire for intravascular pressure measurement, comprising: the device comprises a shell, a signal receiving unit, a fixing unit and a rotating unit; wherein the content of the first and second substances,
the shell is provided with a cavity, the cavity is provided with two ends which penetrate through the cavity along the axial direction, one end of the cavity is used for inserting the guide wire, and the other end of the cavity is used for allowing the signal receiving unit arranged in the cavity to penetrate out;
the signal receiving unit is used for receiving a detection signal from the guide wire;
the fixing unit is sleeved on the signal receiving unit and used for fixing the position of the signal receiving unit in the cavity, and the fixing unit is connected with the inner wall of the shell through the rotating unit;
the rotation unit has a degree of freedom to rotate along an axis of the cavity.
13. The signal receiving device of claim 12, wherein the rotating unit comprises a ball or a needle.
14. The signal receiving device of claim 12, wherein said signal receiving unit is an optical fiber receiving an optical energy signal.
15. The signal receiving apparatus of claim 12, wherein the signal receiving unit includes a resistance circuit composed of three resistors.
16. An intravascular pressure measurement structure comprising: the guide wire according to any one of claims 1 to 11 and the signal receiving device according to any one of claims 12 to 15, wherein the signal receiving unit of the signal receiving device receives a test signal of the pressure sensing unit of the guide wire.
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Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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