CN108742635A - In-vivo length measuring method and device for measuring physical length of in-vivo cavity and guide wire ruler thereof - Google Patents

Abstract

An in vivo length-measuring method and device for measuring the physical length of a lumen in the body, and a guidewire ruler thereof. The method is to insert a guidewire ruler provided with bumps with a density greater than that of a contrast agent from the urethral opening, and guide the catheter along the guidewire The ruler is inserted into the urethra to be measured, and then the catheter is used to inject the contrast agent into the urethra. When the contrast agent is full of the urethra to be measured, the injection of the contrast agent is stopped. With the help of X-rays, the convex points with a density greater than the contrast agent and the contrast agent are displayed. For the urethra to be measured, the total number of bumps on the urethra to be measured is directly obtained, and finally the physical length of the urethra to be measured is obtained by using the distance between the bumps and the total number of bumps on the urethra to be measured. The device includes a catheter and a guide wire, and the catheter is used to inject contrast medium into the urethra and guide the guide wire into the urethra. The guide wire ruler includes an elastic thin wire rod, on which convex points are arranged, and the distance between each pair of adjacent convex points is equal. The present invention can accurately obtain the length parameter in an intuitive manner.

Description

An in vivo length measurement method and device for measuring the physical length of a cavity in the body and its Guide wire ruler

technical field

The invention relates to a length measuring method, a length measuring device and a measuring instrument, in particular to an in vivo length measuring method, a device and a guide wire ruler for measuring the physical length of a cavity in the body.

Background technique

At present, the measurement of length mainly uses equipment such as rulers and length measuring instruments. Since these length measuring methods or instruments are directly measured from the outside of the measured object, however, the urethra is located in the body of the human body, animals, etc., because the body of the human body, animals, etc. Obstacles, resulting in the inability to measure the length of the measured object using existing rulers, length measuring instruments, etc. Obtain physical parameters such as urethra length, blood vessel length, etc. inside the body of the human body and animal body.

Internal lumens include the urethra, blood vessels, etc. Urethral stricture is one of the common diseases in urology, and the treatment of long-segment urethral stricture is one of the difficult problems in urology. Although the measurement of urethral stricture length does not belong to surgical treatment, the surgical plan needs to be determined according to the length of urethral stricture before operation, and the length of urethral stricture is less than 1cm. Cystoscope urethral stenosis internal incision can be performed for severe stenosis. Open surgery is required for stenosis of more than 1cm. For urethral stenosis with a length of more than 3cm, it is even necessary to transplant buccal or lingual mucosa to the urethral bed of the stenosis. Therefore, it is necessary before operation. Accurately measure the physical parameter of urethral stricture, namely its stricture length. At present, urethrography is used clinically to evaluate the length of urethral stricture, and X-ray fluoroscopy is used to estimate the length of urethral stricture. Both medical staff and patients need to receive a large dose of X-ray radiation. Currently, there is no special method for internal cavity The device for measuring the physical length of the urethra can only roughly estimate the length of the stenosis with the help of other instruments. There is no reference object as a ruler, and it is often prone to estimation errors. Even affect the formulation of the operation plan, need to change the operation plan in the operation, increase the trauma to the patient, reduce the success rate of the operation, and cause great misery to the patient.

Contents of the invention

The invention provides an in vivo length measuring method, device and guide wire ruler for measuring the physical length of the internal cavity, which can measure the narrow length of the internal cavity accurately and intuitively and is simple to operate.

The present invention adopts following technical solution:

A method for measuring the physical length of the urethra in the body according to the present invention: prepare a catheter, a guide wire ruler and a contrast agent, the guide wire ruler includes an elastic thin wire rod, and the elastic thin wire rod is provided with Bumps, the density of the material used for the bumps is greater than that of the contrast agent, and the distance between each pair of adjacent bumps is equal, and then the catheter and the guide wire ruler are inserted into the cavity of the body to be measured, and then the catheter is used to inject the contrast agent into the cavity When the contrast medium is full of the cavity to be measured, the injection of the contrast medium is stopped, and with the help of X-rays, the bumps with a density greater than that of the contrast medium and the cavity to be measured displayed by the contrast medium are directly read on the guide wire. The total number of bumps between the measurement starting and ending points of the cavity to be measured, and finally the physical length of the cavity to be measured is obtained by using the distance between the bumps and the total number of bumps in the cavity to be measured.

An in vivo length measuring device for measuring the physical length of a lumen in the body according to the present invention includes a catheter and a guide wire ruler, the catheter is used to inject a contrast agent into the urethra, and the guide wire ruler includes an elastic thin wire rod, Protruding points are arranged on the elastic filament rod, the density of the material used for the protruding points is higher than that of the contrast agent, and the distance between each pair of adjacent protruding points is equal.

A kind of guidewire ruler used in the body length measurement for measuring the physical length of the cavity in the body according to the present invention comprises an elastic thin wire rod, on which a bump is arranged, and the density of the material used for the bump is It is larger than the contrast agent, and the distance between each pair of adjacent bumps is equal.

Compared with prior art, the present invention has following advantage:

(1) The present invention can accurately obtain the length parameter in an intuitive manner. The present invention can not only measure the length of a straight cavity, but also accurately measure the curved length of a curved cavity.

The present invention adopts a guide wire ruler with a density higher than that of a contrast agent. After the guide wire ruler is inserted into the urethral stricture and the contrast agent is injected, it is easy to realize the convex point of the head end of the guide wire ruler and the starting point of the lumen to be measured under X-ray fluoroscopy. The coincidence of the positions avoids repeated search for the starting point of the cavity to be measured. With the help of X-rays, a clear and complete image of the guide wire ruler inserted in the urethral stricture can be obtained, so that the clear and complete image can convert the internal length measurement into the external visible to the naked eye. The measurement realizes the external and intuitive measurement of the length in the body, and transforms it into a simple measurement method like an ordinary ruler.

In the clear and complete image, the convex points are clearly displayed in the image, and the total number of convex points falling on the urethral stricture to be tested can be read accurately and directly. After simple calculation, the total number of convex points can be multiplied by the distance. The length of the urethral stricture to be measured, therefore, the present invention can obtain accurate length parameters in vivo.

The invention can accurately measure the curved length of the curved lumen. After the guidewire ruler of the present invention is inserted into the curved cavity to be measured, as shown in Figure 8, the guidewire ruler bends thereupon and presents a curved shape that matches the curved cavity to be measured, so that the guidewire ruler The displayed length is equal to the bending length of the bending measuring cavity. When the starting and ending points of the section to be measured are determined, the bending line or the curved length of the bending cavity can be accurately measured.

(2) There is a scale line on the catheter. When the guide wire ruler is inserted to the starting point of the section to be measured in the body cavity, the distance between the start point or end point of the section to be measured in the body cavity and the cavity can be directly measured. For example: when using When the invention measures the length of urethral stricture, the distance between the starting point or end point of the urethral stricture and the external opening of the urethra can be directly measured.

(3) Inject the contrast agent through the catheter of the device, and the contrast agent enters the cavity to be measured. For example, when it is used to measure the length of the urethral stenosis, it enters the urethra of the stenosis through the opening at the front of the body, and clearly defines the urethra of the stenosis. The length of the stricture urethra was calculated by counting the number of segments of the wire between the proximal and distal ends of the stricture urethra.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the guide wire of the device of the present invention.

Figure 3 is an axial sectional view of the catheter of the device of the present invention.

Figure 4 is a side view of the catheter of the device of the present invention.

Fig. 5 is a schematic cross-sectional view of the conduit of the device of the present invention.

Fig. 6 is a schematic diagram of the catheter structure of the device of the present invention.

Fig. 7 is a schematic diagram of measuring the length of urethral stricture by using the present invention.

Fig. 8 is a schematic diagram of measuring the length of a curved lumen by using the present invention.

Detailed ways

Example 1

An in vivo length measurement method for measuring the physical length of a cavity in the body,

Prepare a catheter 7, a guide wire ruler 1 and a contrast agent, the guide wire ruler 1 includes an elastic thin wire rod, and a bump 3 is arranged on the elastic thin wire rod, the density of the material used for the bump 3 is greater than that of the contrast agent, and The distance between each pair of adjacent bumps is equal. Then, insert the catheter and the guide wire into the cavity to be measured in the body, and then use the catheter 7 to inject the contrast agent into the cavity. When the contrast agent is full of the cavity to be measured , stop the injection of contrast agent, with the help of X-ray and use the clear and complete X-ray image of the cavity to be measured displayed by the bump 3 with a density greater than that of the contrast agent, and directly read the guide in the clear and complete X-ray image The total number of bumps between the measurement start and end points of the cavity to be measured on the silk ruler, and finally the physical length of the cavity to be measured is obtained by using the distance between the bumps and the total number of bumps in the cavity to be measured. In this embodiment, referring to FIG. 2 , the outside of the elastic thin wire rod of the guide wire is covered with a coating 2 to make the outside of the elastic thin wire rod smooth and easy to enter and exit the urethra.

Example 2

An in vivo length measuring device for measuring the physical length of a lumen in the body, comprising a catheter 7 and a guide wire ruler 1, the catheter 7 is used to inject a contrast agent into the urethra, the guide wire ruler 1 includes an elastic thin wire rod, and Protruding points 3 are arranged on the elastic filament rod, the density of the material used for the protruding points 3 is higher than that of the contrast agent, and the distance between each pair of adjacent protruding points is equal. In this embodiment, referring to FIG. 2 , the outside of the elastic thin wire rod of the guide wire is covered with a coating 2 to make the outside of the elastic thin wire rod smooth and easy to enter and exit the urethra. Referring to Fig. 3, Fig. 4 and Fig. 5, the catheter 7 includes a tube body, which is provided with a contrast medium input port and one end of the tube body with a contrast medium outlet 4, and a septum 5 is also provided in the tube body, A guidewire channel 6 is provided in the first septum 5 . A length measurement scale line 8 is provided on the pipe body, and the length measurement scale line 8 starts from the end face of one end of the pipe body.

Example 3

With reference to Fig. 2, a kind of guide wire ruler 1 that is used in measuring the body length of the physical length of the cavity in the body includes an elastic thin wire rod, and a bump 3 is arranged on the elastic thin wire rod, and the material used for the bump 3 is The density is greater than that of the contrast agent, and the spacing between each pair of adjacent bumps is equal. In this embodiment, the outside of the elastic thin wire rod of the guide wire is covered with a coating 2 to make the outside of the elastic thin wire rod smooth and easy to enter and exit the urethra.

Below in conjunction with accompanying drawing, the use of device of the present invention is described as follows:

As a device for measuring the length of the lumen in the body, that is, when the device is used to measure the length of the urethral stenosis, the catheter can be selected from a silicone tube, as shown in Figure 7, after lubricating the device with paraffin oil, insert the catheter 7 into the urethra, Obstructed by the distal end of the stenosis, a scale line 8 is provided on the tube wall of the catheter 7, and the distance from the stenosis to the external opening of the urethra is directly measured first. Inject the contrast agent through the three-way joint 10 on the side pipeline 9 of the device, the contrast agent enters the urethra of the narrow section through the opening 4 at the front end of the body, and the proximal and distal ends of the urethra of the narrow section are defined, and the injection of the contrast agent is stopped. The tee of the side injection line was closed to keep the contrast agent from leaking out, and X-rays were taken to determine the proximal and distal ends of the stenosis. The guide wire ruler 1 is inserted along the guide wire channel 6 in the catheter 7, and the catheter 7 guides the guide wire ruler 1 through the narrow section. X-ray photography can confirm that the head end of the guide wire ruler 1 goes straight through the narrow section and enters the bladder. Because the density of the guide wire under X-ray is higher than that of the contrast agent, the guide wire ruler of the narrow section is displayed in the contrast at this time. By counting the number of segments of the steel wire between the proximal end and the distal end of the narrow section, due to the thickness of each segment The length of the steel wire 3 can be preset as 2 mm, and thus the length of the urethra in the narrow section can be calculated. For multiple stenosis, the guide wire ruler 1 of the device can also pass through multiple stenosis segments in sequence, and the length of each stenosis segment can be measured respectively in the same way, reflecting the excellence of the device. The guidewire ruler of this device can also be used to measure ureteral strictures. Under the cystoscope, the ureteral catheter is inserted into the ureter, and it is blocked at the stenosis, and the contrast agent is injected, and the contrast agent is seen to remain above the stenosis on fluoroscopy. At this time, the guide wire ruler 1 is inserted into the ureter, and the ureter is passed through the stenosis, and fluoroscopy is performed again It can be seen that the guide wire ruler 1 and the stricture ureter are developed, and the number of segments of the steel wire between the proximal end and the distal end of the stricture is counted to calculate the length of the stricture ureter. When using the present invention to measure the length of the lumen, it is also possible to insert a guide wire first, and then insert the catheter 7 under the guidance of the guide wire.

Claims (9)

1. a kind of long method of survey in vivo for measuring internal cavity physical length, which is characterized in that prepare a conduit, a seal wire Ruler and contrast agent, the seal wire ruler include elastic filament bar, and salient point, the density of salient point material therefor are equipped on elastic filament bar More than contrast agent, and each spacing between adjacent salient point is equal, then, it is to be measured that conduit and seal wire ruler is inserted to internal cavity Section, reuses conduit and contrast agent is injected cavity, after contrast agent is full of to be measured section of cavity, stops contrast agent injection, by X Line and the salient point and to be measured section of cavity showing of contrast agent for being more than contrast agent using density, are directly read on seal wire ruler The salient point sum of to be measured section of cavity measured between origin and destination finally uses the convex of spacing between salient point and to be measured section of cavity Point sum obtains the physical length of to be measured section of cavity.

2. the survey in vivo long method according to claim 1 for measuring internal cavity physical length, which is characterized in that It is covered with coating outside the elastic filament bar of seal wire, so that the outer smooth of elastic filament bar, facilitates disengaging urethra.

3. the survey in vivo long method according to claim 1 for measuring internal cavity physical length, which is characterized in that will Seal wire ruler is inserted to the starting point of to be measured section of internal cavity.

4. a kind of for measuring the internal measuring motion of internal cavity physical length, which is characterized in that including conduit and seal wire ruler, The conduit is used to inject contrast agent to urethra, and the seal wire ruler includes elastic filament bar, and salient point is equipped on elastic filament bar, The density of salient point material therefor is more than contrast agent, and each spacing between adjacent salient point is equal.

5. device according to claim 4, which is characterized in that it is covered with coating outside the elastic filament bar of seal wire, so that The outer smooth of elastic filament bar facilitates disengaging urethra.

6. device according to claim 4, which is characterized in that conduit includes tube body, and contrast agent is equipped on tube body Input port is simultaneously exported in one end of tube body equipped with contrast agent, and an interval is additionally provided in tube body, is set in an interval There is silk guide passage.

7. device according to claim 6, which is characterized in that be equipped with length metering graduation mark and the length on tube body Degree measurement scale line starts from the end face of described tube body one end.

8. a kind of surveying the seal wire ruler used in length for measuring the internal of internal cavity physical length, which is characterized in that including Elastic filament bar is equipped with salient point on elastic filament bar, and the density of salient point material therefor is more than contrast agent, and each to adjacent salient point Between spacing it is equal.

9. seal wire ruler according to claim 8, which is characterized in that it is covered with coating outside the elastic filament bar of seal wire, with The outer smooth for making elastic filament bar facilitates disengaging urethra.