CN210170020U

CN210170020U - Visual positioning guide wire

Info

Publication number: CN210170020U
Application number: CN201920389469.7U
Authority: CN
Inventors: Ke Gao; 高科; Yi Quan; 全懿
Original assignee: Shanghai Gifted Masumoto Medical Material Co Ltd
Current assignee: Shanghai youyiji Medical Technology Co.,Ltd.
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2020-03-24
Anticipated expiration: 2029-03-26

Abstract

The utility model discloses a visual location seal wire, the tip of location seal wire is equipped with positioning sensor the positioning sensor front end is equipped with visualization device, visualization device includes CMOS sensor, imaging lens and optic fibre. The utility model overcomes the defects of the prior art, solves the last blind area of peripheral lung lesion surgery, enables the guide wire to be visible and positionable, and enables doctors to look directly at the focus after reaching the target area through navigation; the problems of high cost, easy breakage of glass fiber, reliability and imaging quality of the conventional optical fiber imaging catheter are solved.

Description

Visual positioning guide wire

Technical Field

The utility model relates to a medical instrument, in particular to a medical guide wire, or a disposable endoscope, in particular to a visual positioning guide wire.

Background

Diagnosis of peripheral pulmonary lesions (perpheral pulmonary lesions) has been a difficult problem for clinicians. Common examination methods include routine bronchoscopy, transthoracic needle lung biopsy, endobronchial radial ultrasound, diagnostic surgery, and the like. However, most peripheral lung lesions cannot be directly observed under the bronchoscope or only have some indirect symptoms, and the diagnosis rate of peripheral lung lesions by the bronchoscope is influenced by the size of the lesion, and the smaller the lesion, the lower the diagnosis rate.

In 2000, a new diagnostic technique for peripheral lung lesions, Electromagnetic Navigation Bronchoscope (ENB), was introduced. The ENB technology integrates the advantages of a simulated bronchoscope and a flexible bronchoscope, not only can accurately reach peripheral lung lesion parts which cannot be reached by a conventional bronchoscope, but also can obtain lesion tissues for pathological examination (from 42 th volume 12: 1671-.

The electromagnetic navigation system comprises ① electromagnetic positioning board, wherein the electromagnetic positioning board is an electromagnetic board with the size of 56 cm multiplied by 47 cm multiplied by 1 cm, and releases low-frequency electromagnetic waves, during examination, the electromagnetic positioning board is placed at the head side of a bronchoscope examination bed, and a patient lies on the bronchoscope examination bed. ② navigation probe is a retractable sensor probe which is fixed at the tip end of a bendable metal cable and transmits information to a computer, the probe is integrated with a catheter with the length of 130 cm and the diameter of 1.9 mm, the catheter can be used as a working channel (EWC) for inserting a bronchoscope operation instrument and is guided to a target area by the navigation system to operate, the probe is placed in an electromagnetic field, the orientation of the probe, such as X, Y, Z axis, rotation, inclination and the like can be captured by the system, the captured information can be displayed in real time and can be superposed with a CT image of the patient, ③ computer software and a monitor, during operation, an operator can watch a 3-dimensional CT image and a mark of an anatomical lesion area from a coronal position, a vector position and an axis and can be known in an operation position of the probe.

① image location, downloading digital CT image into ENB software, reconstructing to form axial, coronal and sagittal breast images and virtual bronchial tree, marking 5-7 corresponding anatomical positions on the CT image and the virtual bronchial tree, marking the focus area in the same way, ② placing sensor on the breast of patient, performing bronchoscopy on the patient under local or general anesthesia, placing positioning probe into the working duct of bronchoscope, confirming the positioning mark on the virtual bronchoscope image and the same mark in vivo through software, superposing and registering the two images, automatically generating navigation map reaching the target area by computer software, ③ operating, embedding bronchoscope into target section bronchial tube through navigation, pushing the probe forward under navigation after embedding EWC, receiving electromagnetic wave information released by electromagnetic plate by sensor probe and feeding back the electromagnetic wave information to system, which can sense probe position accurately, after operator corrects the probe position to the focus area, placing probe into pleuroscope, withdrawing bronchoscope operating apparatus and forceps, and operating apparatus and instrument.

However, the current electromagnetic navigation bronchoscope system lacks a direct visualization device after reaching the target region through the navigation probe, and direct signs of lesions cannot be directly presented to a doctor, which is not beneficial to direct diagnosis of the doctor.

US20070225559a1 proposes a visualization catheter having a separate working channel for an imaging device and an electromagnetic positioning sensor removably inserted into the separate working channel to collect both positional and image information. The imaging device is fiber optic imaging.

The optical fiber is formed by coating inner superfine glass fiber filaments together. Fiber optic imaging suffers from several drawbacks:

①, the cost is high, the manufacturing process is complicated, the more glass fiber yarns are filled in the same area, the finer the glass fiber yarns are, the higher the process requirement is, and the glass fiber yarns are not suitable for disposable products.

② reliability problem, the glass fiber imaging bundle is formed by coating a plurality of strands of monofilaments with the diameter of about 0.03mm, the glass fiber is easy to break and break during processing and manufacturing and using, and after being broken, individual black spots are formed in the image, so that the requirement on operators is high.

③ the problem of imaging quality is that a single glass fiber filament with a diameter not less than 0.03mm and a diameter within 0.5mm can only be filled with more than two hundred pixels, the image is not clear enough, if more glass fiber filaments are filled, the size increases, and the defect is difficult to solve, taking the product OVM6948 of Haowei company as an example, the size of the pixel is 1.75um, and 4W pixels can be output within 0.65mm, and less than 600 glass fiber filaments can be coated within 0.65 mm.

A conventional guidewire is a bendable solid metal cable to which a position sensor probe is fixed at the tip, also known as a positioning guidewire. The traditional guide wire plays a role in guiding and supporting the catheter, can help the catheter enter a blood vessel or other cavities, and guides the catheter to smoothly reach a lesion. When the guide wire reaches some special parts of a human body, such as capillary bronchus of the lung, the guide wire cannot be inserted under the visual premise, blind insertion can be caused, and certain risks and injuries can be caused to a patient.

The positioning guide wire used by the ENB technology is provided with a positioning sensor, and although the positioning sensor still cannot intervene on the premise of visualization, the position of the guide wire can be tracked through electromagnetic navigation, so that the guide wire can accurately reach a target area to perform diagnosis and treatment. However, the direct representation of the lesion cannot be directly presented to the doctor due to the lack of a direct visualization device, which is not conducive to the direct diagnosis of the doctor.

Therefore, there is a need in the art to develop a low-cost, reliable, and clearly imaged visualization positioning guidewire that overcomes the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a visual positioning guide wire, which overcomes the defects of the prior art, solves the last blind zone of peripheral lung lesion surgery, enables the guide wire to be visually positioned, and enables a doctor to look directly at a focus after reaching a target area through navigation; the problems of high cost, easy breakage of glass fiber, reliability and imaging quality of the conventional optical fiber imaging catheter are solved.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a visual location seal wire, the tip of location seal wire is equipped with positioning sensor front end is equipped with visualization device, visualization device includes CMOS sensor, imaging lens and optic fibre.

As a preferred technical solution of the present invention, the positioning sensor is located at the rear end of the CMOS sensor, and the positioning sensor is disposed in the positioning sensor fixing base; the visual device is arranged in a front end seat, and the front end seat is connected with the positioning sensor fixing seat through a connecting ring; the CMOS sensor signal line is connected with the CMOS sensor, and the positioning sensor signal line is connected with the positioning sensor.

As the preferable technical proposal of the utility model, the optical fiber is a glass optical fiber or a plastic optical fiber.

As a preferred technical solution of the present invention, the positioning sensor fixing base is cylindrical and includes a first cavity and a second cavity, wherein the first cavity is used for placing the positioning sensor, and the second cavity is used for placing the optical fiber and the CMOS sensor signal line; the CMOS sensor signal line passes through the second cavity, the positioning sensor is fixed in the first cavity, and the positioning sensor signal line passes through the first cavity and is gathered together with the CMOS sensor signal line and the optical fiber from the second cavity.

As the preferred technical scheme of the utility model, first end seat is cylindrical, including the cavity that is used for placing the CMOS sensor for place the cavity of optic fibre.

As the preferable technical proposal of the utility model, the front end of the CMOS sensor is provided with an imaging lens; the size of the CMOS sensor is less than or equal to 0.65 x 0.65 mm; the diameter of the positioning sensor is less than or equal to 0.45 mm; the diameter of the optical fiber is less than or equal to 0.125mm, and the diameter of the visual positioning guide wire is less than or equal to 1.2 mm.

As the utility model discloses preferred technical scheme, CMOS sensor signal line and electromagnetism positioning sensor signal line adopt the coaxial line, and the coaxial line is inner core, insulating layer, shielding layer and quilt respectively from inside to outside.

As a preferred technical scheme of the utility model, the connecting ring, the positioning sensor fixing seat and the tip seat are made of medical-grade non-metallic materials; the main body of the visual positioning guide wire is a disposable extrusion molding pipe made of medical materials.

As the utility model discloses preferred technical scheme, the main part of visual location seal wire adopts disposable extrusion forming tube, disposable extrusion forming tube's intraductal cavity is used for placing positioning sensor signal line and CMOS sensor signal line.

Compared with the prior art, especially compare with US20070225559A1 patent, the beneficial effect of the utility model lies in:

①, the utility model discloses a CMOS image sensor, CMOS is as an electronic product, the product of batch automated production, and manufacturing cost is lower, and the price varies from several to several hundred yuan, is less than the cost that prior art adopted glass optical fiber imaging to restraint far away, and length is longer more, and glass optical fiber imaging restraints's cost is higher, usually from several thousand to ten thousand yuan.

② can be used as disposable medical product, and can be sterilized with ethylene oxide to avoid cross infection.

③ the product reliability is high, the prior art adopts the glass optic fibre imaging bundle to be formed by the cladding of stranded monofilament about 0.03mm, no matter be processing manufacturing or in the use, all very easily break and lose, and the utility model discloses a signal of CMOS sensor output passes through electron line or coaxial line transmission, and the reliability of signal cable exceeds glass optic fibre far away.

④, the image quality is improved, taking OVM6948 from Haowei as an example, the size of the pixel is 1.75um, and 4W pixels can be output within the range of 0.65mm of the external dimension, and the COMS can be imaged more clearly under the same size, but only less than 600 glass optical fibers can be coated within the range of 0.65 mm.

⑤ the utility model provides a last blind area of surrounding lung pathological change operation, make the visual location of seal wire, reach the target area back through the navigation, let the doctor can look at the focus directly.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic structural view of an electromagnetic navigation system using the visual positioning guide wire of the present invention;

FIG. 2 is a schematic diagram of a state of use of the electromagnetic navigation system;

fig. 3A and 3B are schematic structural views of the visual positioning guide wire of the present invention; wherein, fig. 3A is a schematic cross-sectional structure view of the visual positioning guide wire of the present invention; fig. 3B is a side view of the visual positioning guidewire of the present invention;

fig. 4 is a schematic structural view of the positioning sensor fixing seat of the visual positioning guide wire and the visual device of the present invention;

fig. 5 is a schematic diagram of the signal line structure of the present invention.

Fig. 6 is a schematic view of the concealed object of the visual positioning guide wire of the present invention.

The reference numerals in the figures are illustrated as follows:

1 is visual location seal wire, 2 is the electromagnetism locating plate, 3 is navigation, 4 is image processing system, 5 is the display, 11 is the location sensor, 111 is the location sensor signal line, 12 is the visualization device, 121 is the CMOS sensor, 1211 is the CMOS sensor signal line, 122 is the optic fibre, 13 is the location sensor fixing base, 131 is first cavity, 132 is the second cavity, 14 is first end seat, 15 is the clamping ring.

Detailed Description

As shown in fig. 1, the utility model discloses a visual location seal wire 1 is connected with image processing system 4 and navigation 3 respectively, and visual location seal wire 1's the output of electromagnetic positioning signal all the way (be electromagnetic positioning sensor signal line) can directly receive navigation 3 on. The image processing system 4 is connected with the navigation system 3, and mainly aims to display the endoscope image and the navigation positioning information in one screen at the same time and switch in real time. This function is present in current navigation software. Therefore, the current practice is that the image processing system 4 has a video output function, and outputs video signals to the navigation system 3, and then the video signals are displayed together by the navigation system 3; and in the later stage, the endoscope image and the navigation image can be superposed to perform augmented reality display of the endoscope. The image processing system 4 is provided with a display 5, and the display 5 is connected with the navigation system 3 and the image processing system 4 respectively. The electromagnetic positioning plate 2 is an electromagnetic plate (i.e. a magnetic field generator) and releases low-frequency electromagnetic waves. During examination, the electromagnetic positioning plate 2 is placed in an interlayer below a patient of the bronchoscopy bed, the operation area of the patient is positioned in the center of the electromagnetic positioning plate 2, and the patient lies on the electromagnetic positioning plate 2 (see fig. 2).

As shown in fig. 3A and 3B, the utility model discloses a visual location seal wire 1, its tip is equipped with positioning sensor 11 front end is equipped with visualization device 12, visualization device 12 includes CMOS sensor 121, imaging lens and optic fibre 122, and CMOS sensor 121 front end has imaging lens. The optical fiber 122 may be a glass optical fiber or a plastic optical fiber, and the optical fiber 122 is used for light emitting illumination, i.e., a light emitting structure. The positioning sensor 11 is located at the rear end of the CMOS sensor 121, and the positioning sensor 11 is disposed in a positioning sensor fixing seat 13; the visualization device 12 is arranged in a front end seat 14, and the front end seat 14 is connected with the positioning sensor fixing seat 13 through a connecting ring 15; the CMOS sensor signal line 1211 is connected to the CMOS sensor 121, and the registration sensor signal line 111 is connected to the registration sensor 11.

As shown in fig. 4, the positioning sensor holder 13 is cylindrical and includes a first cavity 131 and a second cavity 132, wherein the first cavity 131 is used for placing the positioning sensor 11, and the second cavity 132 is used for placing the optical fiber 122 and the CMOS sensor signal line 1211; the CMOS sensor signal line 1211 passes through the second cavity 132, the position sensor 11 is fixed in the first cavity 131, and the position sensor signal line 111 passes through the first cavity 131 and is gathered together with the CMOS sensor signal line 1211 and the optical fiber 122 from the second cavity 132. The front end mount 14 is cylindrical and includes a cavity for receiving a CMOS sensor 121 and a cavity for receiving an optical fiber 122.

As shown in fig. 3A and 3B, the present invention fixes the CMOS sensor 121 and the positioning sensor 11 to the end of the visual positioning guide wire 1, and at the same time, the present invention is equipped with a light-emitting structure (i.e., an optical fiber 122), which integrates positioning and imaging technologies.

The diameter of the position sensor 11 may be at least 0.45mm, and in the same case, the smaller the position sensor, the smaller the diameter of the guide wire.

The size of the CMOS sensor 121 may not exceed 0.65 x 0.65mm at the minimum, and in the same case, the smaller the size of the CMOS sensor, the smaller the guide wire diameter may be.

When equipped with a 0.45mm or smaller position sensor 11, a 0.65 x 0.65mm or smaller cross-section CMOS sensor, and an optical fiber 122 having a diameter of 0.125mm or smaller, the guide wire diameter typically does not exceed 1.2 mm.

Since the positioning sensor 11 is disposed at the rear end of the CMOS sensor 121, the positioning sensor 11 is a fixed distance L from the end surface of the guide wire, which may cause a fixed error between the actual position and the electromagnetic navigation positioning position, and the fixed error may be usually eliminated by a computer algorithm.

Meanwhile, the positioning sensor 11 is disposed at the rear end of the CMOS sensor 121, so that two magnetic fields exist, and in order to avoid mutual interference of signals, the CMOS sensor signal line 1211 and the electromagnetic positioning sensor signal line 111 are usually coaxial lines, as shown in fig. 5, the signal lines are an inner core C, an insulating layer D, a shielding layer E, and an outer cover F, respectively, from the inside to the outside. Wherein, inner core C: for transmitting high level signals. An insulating layer D: mainly improves the anti-interference performance and prevents water and oxygen erosion. Shield layer E (outer conductor): it can conduct low level signal through transmission loop and has shielding function. Outer cover F (jacket): the outermost insulating layer plays a role in protection.

The connecting ring 15, the positioning sensor fixing base 13 and the front end base 14 are usually made of medical-grade non-metal materials so as to reduce the cost.

As a disposable product, the main body of the visual positioning guide wire 1 can be a disposable extrusion molding tube, and the material can be medical grade materials such as TPU, PEBAX and the like. The main body of the visual positioning guide wire 1 adopts a disposable extrusion molding tube, and the inner cavity of the disposable extrusion molding tube is used for placing the positioning sensor signal wire 111, the CMOS sensor signal wire 1211 and the optical fiber 122 (see fig. 6, 3A and 3B).

Claims

1. The visual positioning guide wire is characterized in that a positioning sensor is arranged at the end of the positioning guide wire, a visual device is arranged at the front end of the positioning sensor, and the visual device comprises a CMOS sensor, an imaging lens and an optical fiber.

2. The visualization positioning guidewire of claim 1, wherein the positioning sensor is located at a rear end of the CMOS sensor, the positioning sensor being disposed within a positioning sensor holder; the visual device is arranged in a front end seat, and the front end seat is connected with the positioning sensor fixing seat through a connecting ring; the CMOS sensor signal line is connected with the CMOS sensor, and the positioning sensor signal line is connected with the positioning sensor.

3. The visualization positioning guidewire of claim 1, wherein the optical fiber is a glass optical fiber or a plastic optical fiber.

4. The visual positioning guide wire of claim 2, wherein the positioning sensor holder is cylindrical and comprises a first cavity and a second cavity, wherein the first cavity is used for placing the positioning sensor, and the second cavity is used for placing the optical fiber and the CMOS sensor signal wire; the CMOS sensor signal line passes through the second cavity, the positioning sensor is fixed in the first cavity, and the positioning sensor signal line passes through the first cavity and is gathered together with the CMOS sensor signal line and the optical fiber from the second cavity.

5. The visualization positioning guidewire of claim 2, wherein the distal seat is cylindrical and comprises a cavity for placement of a CMOS sensor and a cavity for placement of an optical fiber.

6. The visualization positioning guidewire of claim 1, wherein the CMOS sensor front end has an imaging lens; the size of the CMOS sensor is less than or equal to 0.65 x 0.65 mm; the diameter of the positioning sensor is less than or equal to 0.45 mm; the diameter of the optical fiber is less than or equal to 0.125mm, and the diameter of the visual positioning guide wire is less than or equal to 1.2 mm.

7. The visual positioning guide wire according to claim 2, wherein the CMOS sensor signal line and the electromagnetic positioning sensor signal line are coaxial lines, and the coaxial lines are an inner core, an insulating layer, a shielding layer and an outer cover from inside to outside.

8. The visualization positioning guidewire as set forth in claim 2, wherein the connecting ring, the positioning sensor holder and the tip holder are made of a non-metallic medical material; the main body of the visual positioning guide wire is a disposable extrusion molding pipe made of medical materials.

9. The visual positioning guide wire of claim 8, wherein the main body of the visual positioning guide wire is a disposable extrusion molding tube, and the inner cavity of the disposable extrusion molding tube is used for placing the positioning sensor signal wire and the CMOS sensor signal wire.