CN108760142B - Pressure measuring endoscope, pressure detecting system and pressure control method - Google Patents
Pressure measuring endoscope, pressure detecting system and pressure control method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000013307 optical fiber Substances 0.000 claims abstract description 125
- 238000003780 insertion Methods 0.000 claims abstract description 87
- 230000037431 insertion Effects 0.000 claims abstract description 87
- 238000001514 detection method Methods 0.000 claims description 41
- 238000012545 processing Methods 0.000 claims description 40
- 239000012530 fluid Substances 0.000 claims description 9
- 238000011010 flushing procedure Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 7
- 239000010453 quartz Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000009530 blood pressure measurement Methods 0.000 abstract description 7
- 210000000244 kidney pelvis Anatomy 0.000 description 14
- 239000000835 fiber Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000010408 film Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 206010029148 Nephrolithiasis Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 210000003734 kidney Anatomy 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 210000003708 urethra Anatomy 0.000 description 2
- 206010015866 Extravasation Diseases 0.000 description 1
- 208000000913 Kidney Calculi Diseases 0.000 description 1
- 206010040047 Sepsis Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036251 extravasation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
- G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00165—Optical arrangements with light-conductive means, e.g. fibre optics
- A61B1/00167—Details of optical fibre bundles, e.g. shape or fibre distribution
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- Endoscopes (AREA)
Abstract
The embodiment of the invention discloses a pressure measuring endoscope, a pressure detecting system comprising the pressure measuring endoscope and a pressure control method using the pressure measuring endoscope. Wherein, this pressure measurement endoscope includes: a handle and an insertion portion; the insertion part comprises a working channel, and the working channel penetrates through the end face of the front end of the insertion part and the end face of the other axial end; the front end of the insertion part is used for extending into a body cavity or a natural duct of a patient, and the other axial end of the insertion part is connected with the handle; the optical fiber sensing module is integrated in the insertion part; the end face of the sensing end of the optical fiber sensing module is retracted to the end face of the front end, or the end face of the sensing end of the optical fiber sensing module is flush with the end face of the front end; and the sensing end is used for detecting the pressure at the end face of the front end. The pressure at the front end can be detected and controlled, the condition that the pressure is overlarge in a body cavity or a natural duct of a patient is avoided, the damage caused by the fact that the optical fiber sensing module extends out of the front end of the endoscope is avoided, and the diameter of the insertion part is reduced.
Description
Technical Field
The present application relates to the technical field of medical instruments, and in particular, to a pressure measuring endoscope, a pressure detecting system, and a pressure control method.
Background
An endoscope refers to a medical instrument that can be inserted into a body cavity or a natural orifice of a patient, and performs operations such as observation, measurement, treatment, etc. inside the body cavity or the orifice. For example, otorhinolaryngoscopes, oral endoscopes, dental endoscopes, neuroscopes, uretero-nephroscopes, resectoscopes, laparoscopes, arthroscopes, sinuses, laryngoscopes, and the like.
Various endoscopes commonly used generally comprise a handle and an insertion portion which can be connected with each other, wherein the front end of the insertion portion (i.e. the end far away from the handle) is provided with components for observation, treatment and the like, and when the insertion portion extends into a body cavity or a natural duct of a patient, a doctor can diagnose or treat the condition of the patient by using the components for observation, treatment and the like arranged at the front end of the insertion portion.
Taking a ureteroscope as an example, in the process of treating renal stones, a doctor stretches an insertion part of an endoscope into the renal pelvis of a patient through the urethra, and a breaking component (such as laser) arranged at the front end of the insertion part is used for breaking the stones in the renal pelvis. In the treatment process, flushing fluid (such as water) is continuously filled into the renal pelvis to flush out the broken stone, and the front end of the insertion part is cleaned, so that the shooting view of the shooting assembly is clear. Although the renal pelvis has a certain drainage and permeation function, the internal pressure of the renal pelvis gradually increases along with the increase of the filling of the flushing liquid, if the internal pressure of the renal pelvis is too high, the internal pressure of the renal pelvis can cause the reflux and the extravasation of the liquid in the renal pelvis, complications such as urologic sepsis and the like occur, and the patient may die when serious.
Disclosure of Invention
In view of this, the embodiments of the present application provide a pressure measuring endoscope, a pressure detecting system, and a pressure control method, which can solve the problem that in the prior art, the pressure in a body cavity or a natural duct of a patient is too high in the use process of the endoscope, and avoid the pressure from being too high by detecting the pressure in the body cavity or the natural duct.
The embodiment of the application provides a pressure measurement endoscope, includes: a handle and an insertion portion;
the insertion part comprises a working channel, and the working channel penetrates through the end face of the front end of the insertion part and the end face of the other axial end; the front end of the insertion part is used for extending into a body cavity or a natural duct of a patient, and the other axial end of the insertion part is connected with the handle;
the optical fiber sensing module is integrated in the insertion part;
the end face of the sensing end of the optical fiber sensing module is retracted to the end face of the front end, or the end face of the sensing end of the optical fiber sensing module is flush with the end face of the front end; the sensing end is used for detecting the pressure at the end face of the front end.
Alternatively to this, the method may comprise,
the optical fiber sensing module is an optical fiber F-P cavity sensor, and the end face of the sensing end of the optical fiber sensing module is a film of an F-P cavity in the optical fiber F-P cavity sensor.
Optionally, the optical fiber F-P cavity sensor includes: optical fibers and capillaries;
one end of the capillary tube is connected with the optical fiber, and the other end of the capillary tube is sealed by the film to form an F-P cavity.
Alternatively to this, the method may comprise,
the optical fiber is a single-mode optical fiber, the capillary tube is a quartz capillary tube, and the single-mode optical fiber and the quartz capillary tube are coaxially connected and have the same diameter.
Alternatively to this, the method may comprise,
the end face of the front end is also provided with a camera;
the optical fiber sensing module is also used for illuminating the shooting area of the camera.
The embodiment of the application provides a pressure detection system, including any one of the pressure measurement endoscopes that the above embodiment provided, further includes: a light processing unit and a data processing unit;
the optical processing unit is used for inputting detection light into the optical fiber sensing module; the optical fiber sensing module is also used for collecting reflected light of the detection light output by the optical fiber sensing module and outputting the reflected light to the data processing unit; the optical fiber sensing module obtains the reflected light according to the pressure at the end face of the front end;
the data processing unit is used for obtaining the pressure at the front end face according to the reflected light.
Optionally, the light processing unit includes: a first light generator and a circulator;
the first light generator is used for generating and outputting the detection light to the first end of the circulator;
the second end of the circulator is connected with the optical fiber sensing module and is used for outputting the detection light input by the first end of the circulator to the optical fiber sensing module; and the third end of the circulator is connected with the data processing unit and is used for outputting the reflected light of the detection light output by the optical fiber sensing module to the data processing unit.
Optionally, when the optical fiber sensing module is further used for illuminating a shooting area of the camera at the front end, the light processing unit further includes: a second light generator, an isolator, and a coupler;
the second light generator is used for generating visible light and outputting the visible light to the first end of the coupler through the isolator;
the second end of the coupler is connected with the second end of the circulator, and the third end of the coupler is connected with the optical fiber sensing module;
the coupler is used for outputting the light output by the first end and the second end to the third end after being combined, and is also used for outputting the light input by the third end to the first end and the second end after being split;
the isolator is used for isolating the light which is output to the first end after the coupler is split.
The pressure control method provided by the embodiment of the application is applied to any one of the pressure measuring endoscopes provided by the embodiment, and the method comprises the following steps:
acquiring pressure data detected by the optical fiber sensing module;
obtaining the pressure at the front end face according to the pressure data;
judging whether the pressure value is larger than a preset threshold value, if so, prohibiting the flushing fluid from being output at the front end through the working channel.
Optionally, the method further comprises:
and when the pressure value is smaller than the preset threshold value, allowing flushing liquid to be output at the front end through the working channel.
Compared with the prior art, the embodiment of the application has the following advantages:
in the embodiment of the application, the optical fiber sensing module is integrated in the insertion part of the endoscope, and the sensing end face of the optical fiber sensing module is contracted to the end face of the insertion front end or is flush with the end face of the insertion front end and is used for measuring the pressure at the front end. Therefore, when the pressure measuring endoscope is used, the pressure at the front end can be accurately detected and controlled by utilizing the integrated optical fiber sensing module in the insertion part, the condition that the pressure is overlarge in a body cavity or a natural duct of a patient is avoided, and the damage caused by the fact that the optical fiber sensing module extends out of the front end of the endoscope can be avoided. And because the diameter of the optical fiber sensing module is smaller, the diameter of the insertion part is reduced, and the uncomfortable feeling of a patient is avoided being increased due to the insertion of the insertion part.
Drawings
FIG. 1 is a schematic view of a conventional endoscope;
FIG. 2a is a schematic view of a pressure-measuring endoscope according to an embodiment of the present application;
FIG. 2b is a schematic view of another pressure-measuring endoscope provided in an embodiment of the present application;
FIG. 3 is a schematic axial section of an insert according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a fiber F-P cavity sensor used in embodiments of the present application;
fig. 5 is an end view schematically illustrating a tip of an insertion portion according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a pressure detection system according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of another pressure detection system according to an embodiment of the present disclosure;
FIG. 8 is a schematic view of a circulator in an embodiment of the application;
FIG. 9 is a schematic diagram of a pressure detection system according to an embodiment of the present disclosure;
FIG. 10 is a schematic diagram of a pressure detection system according to an embodiment of the present application;
FIG. 11 is a schematic flow chart of a pressure control method according to an embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of a pressure control device according to an embodiment of the present application.
The reference numerals in fig. 1 are explained as follows:
10-handle, 20-insert, 21-tip.
The reference numerals in fig. 2 a-9 are illustrated as follows:
201-handle;
202-an insertion part, 2021-a working channel, 2022-an end face of a front end of the insertion part, 2023-an end face of the other axial end of the insertion part;
203-optical fiber sensing modules, 2031-end faces of sensing ends of the optical fiber sensing modules;
41-optical fiber, 42-capillary, 43-thin film, 44-fabry-perot (F-P) cavity;
601-pressure endoscope;
602-a light processing unit, 6021-a first light generator, 6022-a circulator, 6023-a second light generator, 6024-an isolator, 6025-a coupler;
603-a data processing unit.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For ease of understanding, the main structure of the existing endoscope will be described first.
Referring to fig. 1, a schematic view of a conventional endoscope is shown. The endoscope generally consists essentially of a handle 10 and an insertion portion 20, with the distal end 21 of the insertion portion 20 extending into a patient's body cavity or natural orifice and the other axial end being connected to the handle 10. The end face of the tip 21 is typically integrated with a camera and illumination device to facilitate the physician's observation of the internal condition of the body cavity or natural orifice. The insertion portion 20 further includes a working channel extending through the distal end 21 and the other axial end and leading from the handle 10 for irrigating fluid and containing a working device such as a laser fiber for lithotripsy.
Taking the intra-renal calculus as an example, a doctor inserts a ureteral dilatation sheath into the entrance of the kidney through the urethra, then introduces the insertion portion 20 into the kidney through the ureteral dilatation sheath, and extends the distal end 21 into the interior of the renal pelvis. Then, the working channel on the insertion part 20 is extended into the laser optical fiber to crush the stones in the renal pelvis, and the working channel is used for pouring flushing fluid to flush the stone crushing area in the renal pelvis, so that the visual field of doctors is ensured to be clear.
Since irrigation fluid may cause excessive pressure inside the renal pelvis, embodiments of the present application provide a pressure measuring endoscope that can detect the pressure of the region where the distal end 21 is actually located (e.g., the renal pelvis), thereby avoiding the excessive pressure inside the renal pelvis from affecting the health of the patient.
The following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings, in order to make the above objects, features and advantages of the present application more comprehensible based on the above ideas.
Referring to fig. 2a and 2b, a schematic structural diagram of a pressure measuring endoscope according to an embodiment of the present application is shown.
The embodiment of the application provides a pressure measurement endoscope, includes: a handle 201 and an insertion portion 202; fig. 3 is a schematic axial section view of an insertion portion according to an embodiment of the present application. It will be appreciated that the pressure measurement endoscope provided in embodiments of the present application may be either a hard scope (i.e., the insertion portion 202 is inflexible, as shown in fig. 2 a) or a soft scope (i.e., the insertion portion 202 is flexible, as shown in fig. 2 b).
As shown in fig. 3, the insertion portion 202 includes a working channel 2021, and the working channel 2021 penetrates an end face 2022 of a leading end of the insertion portion 202 and an end face 2023 of the other end in the axial direction of the insertion portion; wherein, the front end of the insertion part 20 is used for extending into the body cavity or the natural duct of the patient, and the other axial end of the insertion part is connected with the handle 201;
the optical fiber sensing module 203 is integrated in the insertion part 202;
the end face 2031 of the sensing end of the optical fiber sensing module 203 is retracted to the end face 2022 of the front end, or the end face 2031 of the sensing end of the optical fiber sensing module 203 is flush with the end face 2022 of the front end; the sensing end is used to detect the pressure at the end face 2022 of the tip.
In the embodiment of the present application, the optical fiber sensing module 203 integrated inside the insertion portion 202 can directly measure the pressure at the end face 2022 of the front end, so as to improve the accuracy of pressure measurement; on the other hand, because the optical fiber sensing module 203 is integrally packaged inside the insertion portion 202, the insertion portion 202 is of an integral structure, and dead angle areas which are difficult to disinfect do not exist; on the other hand, due to the adoption of the optical fiber sensing technology, the optical fiber sensing module 203 has a small cross-sectional diameter, which is beneficial to reducing the overall diameter of the insertion portion 202 and reducing the discomfort of a patient caused by the insertion portion 202 entering the body.
It will be appreciated that during actual use, the working channel 2021 is utilized by the physician to visualize or manipulate within the patient's body cavity or natural orifice. Taking ureteroscope as an example, working channel 2021 may be filled with irrigation fluid, and a doctor may insert a laser fiber through working channel 2021 to break up stones. In the embodiment of the present application, as can be seen from fig. 3, the working channel 2021 and the optical fiber sensing module 203 integrated inside the insertion portion 202 are isolated from each other, and do not communicate with each other. Operation on the working channel 2021 does not affect the optical fiber sensing module 203, causing damage to the optical fiber sensing module 203; the water flow through working channel 2021 does not interfere with the pressure value measured by fiber sensing module 203.
In some possible implementations of the embodiments of the present application, the optical fiber sensing module 203 may be a fiber Fabry-perot (F-P) cavity sensor, where the F-P cavity is a sensing end of the optical fiber sensing module 203, and a thin film of the F-P cavity in the optical fiber F-P cavity sensor, that is, an end surface of the sensing end of the optical fiber sensing module 203, is retracted in the end surface 2022 of the front end or is flush with the end surface 2022 of the front end. The specific structure and the manufacturing mode of the optical fiber F-P cavity sensor are not limited, and the F-P cavity can be obtained by sealing the optical fiber with a film after the cavity is corroded on the optical fiber, or the F-P cavity can be connected to one end of the optical fiber.
As an example, fig. 4 illustrates the structure of an optical fiber F-P cavity sensor used in the embodiments of the present application. Specifically, the optical fiber F-P cavity sensor may include: an optical fiber 41 and a capillary 42;
one end of the capillary 42 is connected to the optical fiber 41, and the other end of the capillary 42 is closed with a film 43 (i.e., of the F-P cavity) to form an F-P cavity 44. In practical applications, the optical fiber 41 may be a single-mode fiber, and the capillary 42 may be a quartz capillary, and the single-mode fiber and the quartz capillary may be coaxially connected and have the same diameter, so as to reduce the possibility of damage.
With continued reference to FIG. 4, the F-P cavity of the fiber F-P cavity sensor has two parallel reflecting surfaces, wherein the connecting surface between the fiber 41 and the capillary 42 is a first reflecting surface a, the inner surface of the film 43 is a second reflecting surface b, and the reflecting surfaces a and b form the F-P cavity with a cavity length d. The pressure causes the membrane 43 to dent, causing the cavity length of the F-P cavity to change. When light entering the fiber 41 encounters the F-P cavity, it reflects the interference spectrum I produced by the light r The following are provided:
in the formula (1), I i For incident light intensity, R is the light intensity interface reflectivity of the reflecting surface, lambda is the wavelength of light, and d is the cavity length of the F-P cavity. When the length of the F-P cavity changes with the measured pressure, the optical path difference between the two reflected light beams changes, thereby causing the F-P cavity interference spectrum to move. By detecting the movement amount of the interference spectrum, the cavity length change of the F-P cavity can be obtained, and the change of the measured pressure can be deduced.
In some possible implementations of the embodiments of the present application, in order to facilitate the doctor's observation of the body cavity or the natural duct, the end face 2022 of the front end of the pressure sensor insertion portion 202 is further provided with a camera; the optical fiber sensing module 203 may also be used to illuminate the shooting area of the camera.
Because the optical fiber sensing module 203 utilizes the optical fiber sensing technology, in practical application, the optical fiber sensing module 203 may also be utilized to transmit visible light to the end face 2022 of the front end, so as to illuminate the shooting area of the camera disposed on the end face 2022 of the front end, and fig. 5 shows a schematic diagram of another front end face of the insertion portion. Compared with the existing illumination by using the LED lamps, the LED lamp illuminating device can reduce the number of the LED lamps required to be arranged on the end face 2022 of the front end, is beneficial to reducing the diameter of the insertion part and reduces uncomfortable feeling of a patient.
It should be noted that, since the lighting capability of the optical fiber may be limited, the LED lamp may be further configured for auxiliary lighting during implementation, which is not limited in this embodiment of the present application.
In the embodiment of the application, the optical fiber sensing module is integrated in the insertion part of the endoscope, and the sensing end face of the optical fiber sensing module is contracted to the end face of the insertion front end or is flush with the end face of the insertion front end and is used for measuring the pressure at the front end. Therefore, when the pressure measuring endoscope is used, the pressure at the front end can be accurately detected and controlled by utilizing the integrated optical fiber sensing module in the insertion part, the condition that the pressure is overlarge in a body cavity or a natural duct of a patient is avoided, and the damage caused by the fact that the optical fiber sensing module extends out of the front end of the endoscope can be avoided. And because the diameter of the optical fiber sensing module is smaller, the diameter of the insertion part is reduced, and the uncomfortable feeling of a patient is avoided being increased due to the insertion of the insertion part.
Based on the pressure measurement endoscope provided by the embodiment, the embodiment of the application also provides a pressure detection system.
Referring to fig. 6, a schematic structural diagram of a pressure detection system according to an embodiment of the present application is shown.
The pressure detection system provided in the embodiment of the application includes: a pressure measuring endoscope 601, a light processing unit 602, and a data processing unit 603.
The pressure measuring endoscope 601 is any one of the pressure measuring endoscopes provided in the above embodiments, and specific structures and functions thereof are described in detail above, and are not described herein.
A light processing unit 602 for inputting detection light into the optical fiber sensing module 203 of the pressure measuring endoscope 601; the optical fiber sensor module 203 is further configured to collect reflected light of the detection light output by the optical fiber sensor module 203 and output the reflected light to the data processing unit 603; the optical fiber sensing module 203 obtains reflected light according to the pressure at the front end face of the pressure measuring endoscope 601.
The data processing unit 603 is configured to obtain the pressure at the distal end face from the reflected light.
The working principles of the optical fiber sensing module 203 and the data processing unit 603 may be specifically referred to the above description about the embodiments of the pressure measuring endoscope, and will not be repeated here.
In one example, the data processing unit 603 may specifically include: the detector, the analog-to-digital converter and the detection circuit;
after the reflected light is converted into a voltage signal by the detector, the voltage signal is converted into a digital signal by the analog-to-digital converter and is output to the detection circuit, and the detection circuit carries out digital processing according to the formula (1) to obtain a pressure value at the front end face of the insertion part. As one example, the detection circuit may be a Field programmable gate array (Field-Programmable Gate Array, FPGA) circuit board. In practical applications, the data processing unit 603 may also be connected to a display device for displaying the pressure value obtained by the detection circuit to a doctor.
In some possible scenarios, the data processing unit 603 may further include a digital-to-analog converter, for converting the pressure value obtained by the detection circuit into a control signal and outputting the control signal to the water pump, so as to prohibit or allow the water pump to inject the liquid into the working channel of the insertion portion.
In some possible implementations of the embodiments of the present application, as shown in fig. 7, the light processing unit 602 may specifically include: a first light generator 6021 and a circulator 6022;
a first light generator 6021 for generating and outputting detection light to a first end of the circulator 6022.
In the embodiment of the present application, the first optical generator 6021 may specifically be a tuned laser, and may output a swept laser (i.e. light for detection) to the first end of the circulator 6022.
The second end of the circulator 6022 is connected with the optical fiber sensing module 203, and is used for outputting the detection light input by the first end of the circulator 6022 to the optical fiber sensing module 203; a third terminal of the circulator 7022 is connected to the data processing unit 603, and is configured to output the reflected light of the detection light output from the optical fiber sensing module 203 to the data processing unit 603.
It can be understood that the circulator 6022 is a device for unidirectional annular transmission of waves, and takes a four-port circulator as an example, as shown in fig. 8, and the specific working principle is as follows: the wave input by the first end is output to the second end, the wave input by the second end is output to the third end, the wave input by the third end is output to the fourth section, and the wave input by the fourth end is output to the first end. In the embodiment of the present application, the circulator 6022 outputs the detection light input from the first end to the optical fiber sensing module 203 connected to the second end, so that the optical fiber sensing module 203 obtains the reflected light according to the pressure of the front end of the insertion portion; the reflected light input by the optical fiber sensing module 203 is output to the data processing unit 603 connected to the third terminal, so that the data processing unit 603 obtains the pressure at the front end of the insertion portion according to the reflected light.
In some possible implementations of the embodiments of the present application, when the optical fiber sensing module 203 is further configured to illuminate a shooting area of the camera at the front end, the light processing unit 602 may further include: a second light generator 6023, an isolator 6024, and a coupler 6025 as shown in fig. 9;
a second light generator 6023 for generating visible light and outputting to a first end of the coupler 6025 via the isolator 6024.
In the present embodiment, the second light generator 6023 may be a visible light source. The isolator 6024 may transmit visible light to the coupler 6025, but isolate the light transmitted by the coupler 6025 to the second light generator 6023.
The second end of the coupler 6025 is connected with the second end of the circulator 6022, and the third end of the coupler 6025 is connected with the optical fiber sensing module 203;
the coupler 6025 is configured to output the light output from the first end and the second end after being combined and output the light to the third end after being combined, and further configured to output the light input from the third end to the first end and the second end after being combined and split; it is understood that coupler 6025 may implement both combining and splitting of light.
An isolator 6024 for isolating light output to the first end after the coupler splits.
It should be noted that, after the visible light is transmitted through the optical fiber sensing module 203, a part of the light waves may be output to the data processing unit together with the reflected light of the detection light through the coupler 6025 and the circulator 6022 due to the reflection effect. To avoid interference of this part of the light waves with the pressure detection, in some possible implementations, a filter may be further added between the third end of the circulator 6022 and the data processing unit 603 to filter the reflected light waves of the visible light, so that the data processing unit 603 performs pressure calculation according to the filtered reflected light.
For ease of understanding, the pressure detection system provided in the embodiments of the present application will be described below with a specific example.
Referring to fig. 10, a tuning laser (i.e., a first light generator) outputs swept laser (i.e., detection light), which enters a port a of a coupler through a circulator, a visible light source (i.e., a second light generator) outputs visible light, which enters a port B of the coupler, the swept laser is used to sense pressure at a front end, and the visible light is used for illumination. After the sweep laser and the visible light are combined through the coupler, the sweep laser and the visible light are output through a port C of the coupler and enter the optical fiber F-P cavity sensor (namely an optical fiber sensing module). After the sweep frequency laser and the visible light enter the optical fiber F-P cavity sensor, reflected light of the sweep frequency laser and the visible light is input into a filter after passing through a coupler and a circulator, the filter filters the visible light, and only the sweep frequency laser enters a detector, and the detector converts the optical signal into a voltage signal; the voltage signal is converted into a digital signal by a digital-to-analog converter and is input to a detection circuit, the detection circuit carries out digital processing on the digital signal, the pressure at the front end is calculated, and the digital signal can be output to a computer for real-time display. After the visible light enters the optical fiber F-P cavity sensor, a very small part (about 4%) of the light waves return to the circulator together with the reflected sweep laser due to the reflection of the F-P cavity, but most of the light waves can still be transmitted out of the tail end of the optical fiber, so that a camera integrated in the front end can be illuminated. Based on the calculated pressure, whether the pressure is within a safety range can be judged in the detection circuit, if the pressure is within the safety range, the digital-analog converter is utilized to send a control signal to the water supply pump so as to enable the water supply pump to continuously inject liquid into the working channel of the insertion part, and if the pressure exceeds the safety range, the digital-analog converter is utilized to enable the pump to stop liquid injection until the pressure returns to the safety range again.
In the embodiment of the application, the optical fiber sensing module is integrated in the insertion part of the endoscope, and the sensing end face of the optical fiber sensing module is contracted to the end face of the insertion front end or is flush with the end face of the insertion front end and is used for measuring the pressure at the front end. Therefore, when the pressure measuring endoscope is used, the pressure at the front end can be accurately detected and controlled by utilizing the integrated optical fiber sensing module in the insertion part, the condition that the pressure is overlarge in a body cavity or a natural duct of a patient is avoided, and the damage caused by the fact that the optical fiber sensing module extends out of the front end of the endoscope can be avoided. And because the diameter of the optical fiber sensing module is smaller, the diameter of the insertion part is reduced, and the uncomfortable feeling of a patient is avoided being increased due to the insertion of the insertion part.
Based on the pressure measuring endoscope and the pressure detecting system provided by the embodiments, the embodiments of the present application also provide a pressure control method, which can avoid the excessive pressure in the body cavity or the natural duct of the patient, and has an influence on the health of the patient.
Referring to fig. 11, a flow chart of a pressure control method according to an embodiment of the present application is shown.
The pressure control method provided by the embodiment of the application is applied to any one of the pressure measuring endoscopes or any one of the pressure detecting systems provided by the embodiment. The method comprises the following steps:
s1101: acquiring pressure data detected by an optical fiber sensing module in a pressure measuring endoscope;
s1102: obtaining the pressure at the end face of the front end according to the pressure data;
s1103: judging whether the pressure value is greater than a preset threshold value, if so, executing step S1104;
s1104: the flushing fluid is prevented from being output at the front end through the working channel.
It may be appreciated that the preset threshold may be specifically set according to an actual situation, which is not limited in the embodiments of the present application.
Optionally, when the determination result of S1103 is no, the method may further include:
s1105: allowing flushing fluid to be delivered at the front end via the working channel.
In the embodiment of the application, the optical fiber sensing module is integrated in the insertion part of the endoscope, and the sensing end face of the optical fiber sensing module is contracted to the end face of the insertion front end or is flush with the end face of the insertion front end and is used for measuring the pressure at the front end. Therefore, when the pressure measuring endoscope is used, the pressure at the front end can be accurately detected and controlled by utilizing the integrated optical fiber sensing module in the insertion part, the condition that the pressure is overlarge in a body cavity or a natural duct of a patient is avoided, and the damage caused by the fact that the optical fiber sensing module extends out of the front end of the endoscope can be avoided. And because the diameter of the optical fiber sensing module is smaller, the diameter of the insertion part is reduced, and the uncomfortable feeling of a patient is avoided being increased due to the insertion of the insertion part.
Based on the pressure control method provided in the above embodiment, the embodiment of the present application further provides a pressure detection device, which is applied to any one of the pressure measuring endoscopes provided in the above embodiment. As shown in fig. 12, the apparatus includes: an acquisition module 1201, a resolving module 1202, a judging module 1203 and a control module 1204;
the acquisition module 1201 is used for acquiring pressure data detected by the optical fiber sensing module in the pressure measuring endoscope;
a resolving module 1202 for obtaining the pressure at the front end face according to the pressure data;
a judging module 1203 configured to judge whether the pressure value is greater than a preset threshold;
the control module 1204 is configured to prohibit the output of the rinse solution from the front end via the working channel when the determination result of the determination module 1203 is yes.
Optionally, the control module 1204 is further configured to allow the rinse solution to be output from the front end through the working channel when the determination result of the determination module 1203 is negative.
Based on the pressure control method and the pressure control device provided by the embodiment, the embodiment of the application also provides pressure control equipment, which comprises a memory and a processor;
a memory for storing codes; and a processor for executing any one of the pressure control methods provided in the above embodiments, according to the codes stored in the memory.
The above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (3)
1. A pressure detection system, comprising a pressure-measuring endoscope, the system further comprising a light processing unit and a data processing unit;
the pressure measuring endoscope comprises a handle and an insertion part;
the insertion part comprises a working channel, and the working channel penetrates through the end face of the front end of the insertion part and the end face of the other axial end; the front end of the insertion part is used for extending into a body cavity or a natural duct of a patient, and the other axial end of the insertion part is connected with the handle;
the optical fiber sensing module is integrated in the insertion part;
the end face of the sensing end of the optical fiber sensing module is retracted to the end face of the front end, or the end face of the sensing end of the optical fiber sensing module is flush with the end face of the front end; the sensing end is used for detecting the pressure at the end face of the front end;
the optical fiber sensing module is an optical fiber F-P cavity sensor, and the end face of the sensing end of the optical fiber sensing module is a film of an F-P cavity in the optical fiber F-P cavity sensor; the optical fiber F-P cavity sensor comprises: optical fibers and capillaries; one end of the capillary tube is connected with the optical fiber, and the other end of the capillary tube is sealed by the film to form an F-P cavity; the optical fiber is a single-mode optical fiber, the capillary is a quartz capillary, and the single-mode optical fiber and the quartz capillary are coaxially connected and have the same diameter;
the end face of the front end is also provided with a camera;
the optical fiber sensing module is also used for illuminating a shooting area of the camera;
the optical processing unit is used for inputting detection light into the optical fiber sensing module; the optical fiber sensing module is also used for collecting reflected light of the detection light output by the optical fiber sensing module and outputting the reflected light to the data processing unit; the optical fiber sensing module obtains the reflected light according to the pressure at the end face of the front end;
the data processing unit is used for obtaining the pressure at the front end face according to the reflected light;
the light processing unit includes: a first light generator and a circulator;
the first light generator is used for generating and outputting the detection light to the first end of the circulator;
the second end of the circulator is connected with the optical fiber sensing module and is used for outputting the detection light input by the first end of the circulator to the optical fiber sensing module; the third end of the circulator is connected with the data processing unit and is used for outputting the reflected light of the detection light output by the optical fiber sensing module to the data processing unit;
when the optical fiber sensing module is further used for illuminating a shooting area of the camera at the front end, the light processing unit further comprises a second light generator, an isolator and a coupler;
the second light generator is used for generating visible light and outputting the visible light to the first end of the coupler through the isolator;
the second end of the coupler is connected with the second end of the circulator, and the third end of the coupler is connected with the optical fiber sensing module;
the coupler is used for outputting the light output by the first end and the second end to the third end after being combined, and is also used for outputting the light input by the third end to the first end and the second end after being split;
the isolator is used for isolating the light which is output to the first end after the coupler is split.
2. A pressure control method applied to the pressure-measuring endoscope of the pressure detection system of claim 1, the method comprising:
acquiring pressure data detected by the optical fiber sensing module;
obtaining the pressure at the front end face according to the pressure data;
judging whether the pressure is greater than a preset threshold value, if so, prohibiting the flushing fluid from being output at the front end through the working channel.
3. The method according to claim 2, wherein the method further comprises:
and when the pressure is smaller than the preset threshold value, allowing flushing liquid to be output at the front end through the working channel.
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| CN109431481B (en) * | 2018-12-25 | 2024-03-19 | 苏州博思光学有限公司 | Micro optical fiber pressure sensor, manufacturing method thereof and pressure sensing system |
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