A digital medical elastic cavity circumference measuring instrument and its measuring method

Abstract

The present invention relates to a digital medical elastic cavity circumference measuring instrument and a measuring method thereof. The measuring instrument comprises: a detection section, a handle, an axial pressure sensing component, a radial pressure sensing component, a light sensing component and a controller. The detection section is used to be inserted into the elastic cavity to be detected. The axial pressure sensing component is arranged on the pressure-bearing surface at the end of the handle, and can reflect the pushing force on the measuring instrument for reference. The radial pressure sensing component comprises a plurality of radial pressure acquisition units. Each group of radial pressure acquisition units comprises a plurality of radial pressure sensors. Each radial pressure sensor collects pressure sensing data of the pressure magnitude of each section on the detection section. The light sensing component comprises a plurality of photosensitive units. Each group of photosensitive units collects light intensity data at a corresponding position. The controller is used to measure and obtain the circumference of the cavity. The measuring instrument can accurately obtain the effective circumference of the elastic cavity of the human body, and provide necessary data support for the diagnosis and treatment of cavity diseases and the research and development of related medical devices.

Description

Technical Field

[0001] The invention relates to the technical field of cavity diagnosis and treatment, and in particular to a digital medical elastic cavity circumference measuring instrument and a measuring method thereof. Background Art

[0002] Most of the elastic cavities of the human body or animals (such as the urethra and anus) are elastic in capacity. When not filled with blood, urine, feces or other tissues, they are closed. Their circumference cannot be directly measured, and it is even more difficult to obtain feedback on the effective circumference of the endoscope or catheter allowed for direct cavity diagnosis and treatment operations, which affects the diagnosis and treatment of cavity diseases and the development of related medical devices.

[0003] In addition, the circumference data of male and female urethra in China is still missing. The circumference F26 transurethral or transcervical electrosurgical resectoscope commonly used in China actually follows the standards of European and American countries, which is not completely suitable for the urethral anatomical structure of the Chinese population. Summary of the invention

[0004] Based on this, it is necessary to address the technical problem that the effective circumference of the elastic cavity in the prior art is not easy to measure, thereby affecting the diagnosis and treatment of cavity diseases and the development of related medical devices. The present invention provides a digital medical elastic cavity circumference measuring instrument and a measurement method thereof.

[0005] The invention discloses a digital medical elastic cavity circumference measuring instrument, which comprises a detection section, a handle, an axial pressure sensing component, a radial pressure sensing component, a light sensing component and a controller.

[0006] The detection section is used to be inserted into the cavity to be detected to measure the circumference. The detection section is conical, and the thinner end is the insertion end.

[0007] The handle is fixedly connected to the thicker end of the detection section.

[0008] The axial pressure sensing component includes at least one axial pressure sensor. The axial pressure sensor is arranged on the pressure-bearing surface of the end of the handle. The axial pressure sensor is used to collect pressure sensing data reflecting the magnitude of the axial pressure on the corresponding installation position on the end of the handle.

[0009] The radial pressure sensing component includes a plurality of radial pressure collection units. The plurality of radial pressure collection units are arranged in an array along the extension direction of the detection section. Each radial pressure collection unit includes a plurality of radial pressure sensors which are arranged in a circle around the axis of the detection section. Each radial pressure sensor is arranged on the surface of the detection section and is used to collect pressure sensing data reflecting the magnitude of the radial pressure on the corresponding installation position on the detection section.

[0010] The light sensing component includes multiple groups of photosensitive units. The multiple groups of photosensitive units are all arranged inside the detection section and are linearly distributed along the axis of the detection section. Each group of photosensitive units is used to collect light intensity data at a corresponding position.

[0011] The controller is used to: (a) obtain the detection signal in the radial pressure sensing component, and analyze in real time the relationship between the multiple average pressure values ​​obtained by each group of radial pressure acquisition units and a preset pressure threshold value one. (b) When the average pressure value of any group of radial pressure acquisition units is greater than a preset pressure threshold value one, obtain the detection signal of the light sensing component, and determine a light-dark dividing line perpendicular to the axis of the detection section based on the light intensity signal of each group of photosensitive units. (c) According to a point position-circumference relationship table of the detection section, according to the intersection point of the light-dark dividing line and the axis of the detection section, look up the table to obtain the circumference of the detection section corresponding to the intersection point, that is, the effective circumference of the cavity.

[0012] As a further improvement of the present invention, the controller is also used to control an interactive end to perform real-time feedback according to the detection signal in the radial pressure sensing component. The real-time feedback method includes the following steps:

[0013] S11: Acquire multiple pressure sensing data collected by multiple radial pressure sensors in real time.

[0014] S12: summing up and averaging the various pressure sensing data in each group of radial pressure collection units, and then obtaining an average pressure value associated with each group of radial pressure collection units.

[0015] S13: Take the maximum pressure value F among the average pressure values ​​of each group max , and the maximum pressure value F max The pressure progress ratio P is calculated by analyzing the ratio with the preset pressure threshold:

[0016]

[0017] Where F0 is the preset pressure threshold value.

[0018] S14: Send the numerical signal of the pressure progress ratio P to an interactive terminal in real time for presentation, and control the interactive terminal to issue an alarm when the pressure progress ratio reaches 100%.

[0019] As a further improvement of the present invention, the digital medical elastic cavity circumference measuring instrument also includes: a handle and an axial pressure sensor.

[0020] The handle is fixedly connected to the thicker end of the detection section;

[0021] The axial pressure sensor is fixed on the side of the handle away from the detection section; the axial pressure sensor is used to collect pressure sensing data reflecting the magnitude of the axial pressure on the corresponding installation position at the end of the handle;

[0022] The controller is also used to send the axial pressure to the interactive end for presentation in real time, and to determine whether the axial pressure is greater than a preset pressure threshold value 2. When the axial pressure is greater than the preset pressure threshold value 2, the interactive end is controlled to issue an alarm.

[0023] As a further improvement of the present invention, the method for determining the light-dark dividing line comprises the following steps:

[0024] S21: Acquire the light intensity value collected by each group of light-sensitive units in real time.

[0025] S22: Divide the multiple groups of photosensitive units on the detection segment into regions along the extension direction of the axis of the detection segment, thereby obtaining multiple grid-shaped photosensitive regions. The multiple photosensitive regions are all located in the same plane as the axis of the detection segment.

[0026] S23: Summarize multiple light intensity values ​​in each photosensitive area and calculate the average light intensity value L′ corresponding to each photosensitive area:

[0027]

[0028] Where, L i is the light-sensing intensity value of each group of photosensitive units in each photosensitive area. n is the number of photosensitive units in each photosensitive area, and n≥2.

[0029] S24: performing difference calculations on the average light intensity values ​​corresponding to each of the two adjacent photosensitive areas, and then obtaining a plurality of difference values ​​for reflecting the magnitude of light intensity fluctuation between the two adjacent photosensitive areas.

[0030] S25: taking the maximum difference among the multiple differences, determining two adjacent target photosensitive areas corresponding to the maximum difference, and then taking the boundary line between the two target photosensitive areas as the light-dark boundary line.

[0031] As a further improvement of the present invention, the interactive terminal includes a display unit and a voice broadcast unit. The display unit is used to display the value of the pressure progress ratio in real time in the form of text and / or graphics. The voice broadcast unit is used to regularly broadcast the voice containing the pressure progress ratio information.

[0032] As a further improvement of the present invention, each set of radial pressure collection units further includes a mounting member 1. The mounting member 1 is annular and embedded in the detection section. The outer surface of the mounting member 1 is flush with the surface of the detection section and is connected to a plurality of radial pressure sensors.

[0033] As a further improvement of the present invention, the radial pressure sensor adopts a piezoelectric film.

[0034] As a further improvement of the present invention, the light sensing component further comprises a second mounting member. The second mounting member is strip-shaped, and its extension direction is parallel to the axis of the detection section. One side of the second mounting member is parallel to the axis of the detection section, and the side is fixedly connected to the plurality of photosensitive units.

[0035] As a further improvement of the present invention, the surface of the detection section is provided with a smooth coating.

[0036] The present invention also discloses a digital medical elastic cavity circumference measurement method, which is applied to any one of the digital medical elastic cavity circumference measuring instruments mentioned above. The cavity circumference measurement method comprises the following steps:

[0037] Insertion phase:

[0038] The detection segment is inserted into the cavity to be detected, and the pressure sensing data at various locations on the extension direction of the detection segment surface and the light intensity data at various locations on the axis of the detection segment are collected in real time.

[0039] Measurement phase:

[0040] (a) Obtain the detection signal in the radial pressure sensing component, and analyze in real time the relationship between the multiple average pressure values ​​obtained by each group of radial pressure acquisition units and a preset pressure threshold value one. (b) When the average pressure value of any group of radial pressure acquisition units is greater than a preset pressure threshold value one, obtain the detection signal of the light sensing component, and determine a light-dark dividing line perpendicular to the axis of the detection section based on the light intensity signal of each group of photosensitive units. (c) According to a point position-circumference relationship table of the detection section, according to the intersection point of the light-dark dividing line and the axis of the detection section, look up the table to obtain the circumference of the detection section corresponding to the intersection point, that is, the effective circumference of the elastic cavity.

[0041] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0042] 1. The measuring instrument is provided with a conical detection section. When the detection section is inserted into the elastic cavity, the originally closed elastic cavity can be gradually opened. The radial pressure sensing component is used to stop the insertion when a certain pressure is reached on the surface of the detection section. Then, the light sensing component is used to determine the intersection of light and dark, and the cavity opening can be accurately located, thereby obtaining the circumference size at the cavity opening, and then more accurately obtaining the effective circumference of the elastic cavity, that is, the maximum target circumference of the endoscope or catheter allowed for cavity diagnosis and treatment operations, providing data support for the diagnosis and treatment of cavity diseases. In addition, the measuring instrument also provides an axial pressure sensor on the pressure-bearing surface of the handle, so that the current axial thrust applied can be reflected to the operator in real time, and an alarm can be issued when the axial pressure is too large, so as to further facilitate medical staff to perform calibration verification.

[0043] 2. The radial pressure sensor of the measuring instrument can be a flexible piezoelectric film sensor, which can convert pressure into a piezoelectric signal. It not only has a high sensitivity, but also can save volume due to its flexible film structure, so it is easy to be attached and integrated on the surface of the detection section to form a smooth integrated structure, and when the detection section is inserted into the cavity, it is not easy to cause scratches on human skin.

[0044] 3. The measuring instrument can be provided with a plurality of linearly distributed photosensitive units. When the detection section is inserted into a reasonable position in the cavity, the photosensitive units located in the cavity are shielded by the cavity tissue, so the light intensity values ​​sensed by the photosensitive units in the cavity are obviously different from the cavity tissue in the outside world (located outside the cavity), that is, strong light intensity fluctuations. Moreover, since the photosensitive units are small in size, a large number of them can be set. Therefore, the position of the urethral opening can be determined more accurately by obtaining the light and dark changes in the plurality of photosensitive units, and the circumference size of the urethral opening can be obtained more accurately through a point-circumference relationship table.

[0045] 4. The measuring instrument can calculate the pressure progress ratio in real time and send it to an interactive terminal for presentation in real time, and control the interactive terminal to issue an alarm when the pressure progress ratio reaches 100%. The operator can insert the detection section into the reasonable position in the cavity according to the interactive terminal information and alarm. In addition, the measuring instrument can provide real-time progress feedback during the detection stage, and issue a reminder alarm when the measuring instrument is inserted into the reasonable position in the cavity, so that medical staff can perform calibration verification conveniently, and then measure the circumference of the cavity opening in the subsequent process.

[0046] 5. The surface of the detection section of the measuring instrument can be provided with a smooth coating, and the tip thereof can also be rounded, thereby helping to reduce the possibility of friction damage when the detection section is inserted into the elastic cavity.

[0047] 6. The beneficial effects of this measuring method are the same as those of the above-mentioned measuring instrument and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a schematic diagram of the three-dimensional structure of the digital medical elastic cavity circumference measuring instrument in Example 1 of the present invention;

[0049] Figure 2 for Figure 1 Schematic diagram of the connection between the middle detection section and the handle;

[0050] Figure 3 for Figure 1 A schematic diagram of a three-dimensional structure in which a measuring instrument is provided with a circumference scale;

[0051] Figure 4 for Figure 1 A local enlarged schematic diagram in FIG.

[0052] Figure 5 for Figure 4 Schematic diagram of the three-dimensional structure of the mid-radial pressure acquisition unit;

[0053] Figure 6 for Figure 1 A three-dimensional cross-sectional view of the measuring instrument;

[0054] Figure 7 Bit Figure 6 A partial enlarged schematic diagram of the second mounting part.

[0055] Main component symbols

[0056] 1. Detection section; 2. Radial pressure collection unit; 21. Mounting piece 1; 22. Radial pressure sensor; 3. Photosensitive unit; 4. Mounting piece 2; 5. Handle; 6. Axial pressure sensor.

[0057] The above description of the main component symbols is combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0061] Example 1

[0062] See also Figure 1 This embodiment provides a digital medical elastic cavity circumference measuring instrument, which includes: a detection section 1, a handle 5, an axial pressure sensing component, a radial pressure sensing component, a light sensing component and a controller.

[0063] See also Figure 2 , the detection section 1 is used to be inserted into the cavity to be detected to measure the circumference. The detection section 1 is conical, and the thinner end is the insertion end, and the thicker end can be fixedly connected to the handle 5. The insertion section of the detection section 1 can be a hemispherical fillet to avoid sharp damage to human tissue. During the insertion process, the handle 5 can be held and the insertion end of the detection section 1 can be inserted into the cavity opening. In addition, the width of the handle 5 can be set to be larger than the diameter of the tail end of the detection section 1, so as to prevent the measuring instrument from slipping into the cavity. In this embodiment, the handle 5 can be set to a flat sheet shape. Of course, in other embodiments, the handle 5 can also be set to other shapes that are easy to hold. There can be a smooth transition between the handle 5 and the end of the detection section 1.

[0064] The surface of the detection section 1 may be provided with a smooth coating. In this embodiment, the smooth coating may be made of Teflon material, which has an extremely low friction coefficient, good wear resistance, and excellent non-stick properties. The detection end of the detection section 1 may also be rounded, thereby helping to reduce the possibility of friction damage when the detection section 1 is inserted into the elastic cavity.

[0065] See also Figure 3In this embodiment, the surface of the detection section 1 can also be provided with a plurality of long scales for indicating the circumference size, and the circumference scale gradually increases from the thinner end to the thicker end. In this embodiment, the circumference range of the long scale is 10F to 30F. In addition, 10 small scales can be provided between two adjacent long scales, so that the circumference identification is accurate to the 0.1F level. It should be supplemented that the circumference F is a unit indicating the circumference. In addition to the circumference scale, the detection section 1 can also be provided with a length scale, so that it is convenient for medical staff to directly observe the scale at the urethral opening, and also know the length of the insertion into the urethra, which is of guiding significance for subsequent clinical diagnosis.

[0066] See also Figure 4 and Figure 5 , the radial pressure sensing component includes multiple groups of radial pressure acquisition units 2. Multiple groups of radial pressure acquisition units 2 are distributed in an array along the extension direction of the detection section 1. In the figure, for ease of explanation, approximately eight groups of radial pressure acquisition units 2 are provided. Of course, in actual applications, more radial pressure acquisition units 2 can be provided according to the accuracy requirements of positioning, and the spacing between adjacent units will also become narrower. Each group of radial pressure acquisition units 2 includes multiple radial pressure sensors 22 distributed in a circle around the axis of the detection section 1. Each radial pressure sensor 22 is arranged on the surface of the detection section 1 and is used to collect pressure sensing data reflecting the radial pressure magnitude of the corresponding installation position on the detection section 1. In this embodiment, each group of radial pressure acquisition units 2 can also include a mounting member 21, which is annular and embedded in the detection section 1. The outer surface of the mounting member 21 is flush with the surface of the detection section 1 and is connected to multiple radial pressure sensors 22. It is mainly explained that multiple mounting members 21 are distributed along the axial direction of the detection section 1, and are successively set to different caliber sizes along the conical detection section 1.

[0067] In this embodiment, the radial pressure sensor 22 can adopt a flexible piezoelectric film sensor of model LS-YD 001, which can convert pressure into a piezoelectric signal. Not only does it have a high sensitivity, but also because it is a flexible film structure, it can save volume, so it is easy to be attached and integrated on the surface of the detection section 1 to form a smooth integrated structure, and then when the detection section 1 is inserted into the cavity, it is not easy to cause scratches on human skin. In this embodiment, there can be four radial pressure sensors 22 arranged on a single mounting member 21, and the center of the mounting member 21 can be distributed in an equidistant circle. Of course, in other embodiments, according to the requirements of pressure sensing accuracy, other numbers of radial pressure sensors 22 can also be arranged on each group of radial pressure acquisition units 2.

[0068] See also Figure 6 and Figure 7, the light sensing component includes a plurality of groups of photosensitive units 3. The plurality of groups of photosensitive units 3 are all arranged inside the detection section 1, and are linearly distributed along the axis of the detection section 1. Each group of photosensitive units 3 is used to collect light intensity data at a corresponding position. In the present embodiment, the light sensing component may further include a mounting member 4. The mounting member 4 is strip-shaped, and its extension direction is parallel to the axis of the detection section 1. One side of the mounting member 4 is parallel to the axis of the detection section 1, and the side is fixedly connected to the plurality of groups of photosensitive units 3.

[0069] Please refer again Figure 7 , the photosensitive unit 3 adopts an existing light intensity sensor, and of course a CMOS image sensor can also be used. The pixel units in the CMOS image sensor of the existing mobile phone camera are distributed in an array in a small rectangular area, and in this embodiment, the pixel units can be linearly dispersed in the axis position of the detection section 1. Of course, multiple block-shaped rectangular CMOS image sensors can also be spliced ​​along the axis of the detection section 1, or arranged at intervals. The figure shows the dispersion of local CMOS pixel units. Since the CMOS pixel unit can produce different overflow blurs for different light signals within a certain input range, similar to the different exposure levels on a photo, it can also generate corresponding response signals for different light intensities in this embodiment. In addition, the CMOS pixel unit is small in size and can be set in large numbers, thereby improving the photosensitivity accuracy.

[0070] In this embodiment, when the detection section 1 is inserted into a reasonable position in the cavity, the photosensitive unit 3 located in the cavity is in a state of being shielded by the cavity tissue, so the light intensity value sensed by it is significantly different from the cavity tissue in the outside world (located outside the cavity), that is, a strong light intensity fluctuation. Moreover, since the photosensitive unit 3 is small in size, a large number of photosensitive units can be set. Therefore, by obtaining the light and dark changes in multiple photosensitive units 3, the position of the urethral opening can be determined more accurately, so that the circumferential size of the urethral opening can be obtained more accurately.

[0071] It should be noted that the detection section 1 can be made of transparent and colorless medical sterilization packaging materials, such as medical PVC materials, to reduce pollution and facilitate use without sterilization. Metal can also be used as the material of the detection section 1, so that it can be reused after disinfection to reduce the cost of diagnosis and treatment. Since a photosensitive element is provided inside the detection section 1, when the detection section 1 is made of metal material, a light-transmitting hole or light-transmitting groove corresponding to the photosensitive unit 3 can be opened on the metal surface, and a light-transmitting sealing material can be filled in the hole or groove.

[0072] The controller is used to execute the three processes (a), (b), and (c). The specific processes are as follows.

[0073] (a) Acquire the detection signal in the radial pressure sensing component, and analyze in real time the relationship between the multiple average pressure values ​​acquired by each group of radial pressure acquisition units 2 and a preset pressure threshold value 1.

[0074] In the process of pressure judgment, the control can also control an interactive end to provide real-time feedback according to the detection signal in the radial pressure sensing component. The real-time feedback method includes the following steps:

[0075] S11: Acquire multiple pieces of pressure sensing data collected by multiple radial pressure sensors 22 in real time.

[0076] S12: summing and averaging the various pressure sensing data in each group of radial pressure acquisition units 2, and then obtaining the average pressure value related to each group of radial pressure acquisition units 2. The radial pressure acquisition units 2 are arranged in an annular shape, and the measurement data of multiple radial pressure acquisition units 2 are summed and averaged to avoid the situation where individual radial pressure sensors 2 cannot collect pressure signals due to wrinkles or depressions in the narrow part of the cavity, thereby achieving more accurate measurement results.

[0077] S13: Take the maximum pressure value F among the average pressure values ​​of each group max , and the maximum pressure value F max The pressure progress ratio P is calculated by analyzing the ratio with the preset pressure threshold:

[0078]

[0079] Where F0 is the preset pressure threshold value.

[0080] S14: Send the numerical signal of the pressure progress ratio P to an interactive terminal for presentation in real time, and control the interactive terminal to issue an alarm when the pressure progress ratio reaches 100%. The operator can insert the detection section 1 into a reasonable position in the cavity according to the interactive terminal information and the alarm.

[0081] The interactive end may include a display unit and a voice broadcast unit. The display unit may be a display screen for displaying the numerical value of the pressure progress ratio in real time in the form of text and / or graphics. The voice broadcast unit may be a speaker for regularly broadcasting voice containing information on the pressure progress ratio. The measuring instrument in this embodiment realizes real-time progress feedback during the detection phase, and issues a reminder alarm when the measuring instrument is inserted into a reasonable position in the cavity, thereby facilitating calibration verification by medical staff, and further facilitating measurement of the circumference at the cavity opening in subsequent processes.

[0082] In this embodiment, the circumference measuring instrument can be used to measure the circumference of the urethra of adult males. Since the external urethral orifice of the male urethra is one of the three narrowest places in the male urethra, the effective circumference of this place can be directly measured, that is, the maximum target circumference of the endoscope or catheter allowed for direct cavity diagnosis and treatment operations can be fed back.

[0083] In addition, due to urethral pathology in some patients, some tissues deep in the urethra swell and cause the urethra to narrow, resulting in the urethral opening not being one of the narrowest parts of the urethra. At this time, one of the radial pressure collection units 2 will be subjected to a pressure higher than the preset pressure threshold at the corresponding pathological position. At this time, the circumference of the detection segment 1 corresponding to the position of the radial pressure collection unit 2 can be directly used as the above-mentioned maximum target circumference.

[0084] In this embodiment, the axial pressure sensor 6 can be fixed on the side of the handle 5 away from the detection section 1; the axial pressure sensor 6 can be used to collect pressure sensing data reflecting the magnitude of the axial pressure on the corresponding installation position at the end of the handle 5;

[0085] The axial pressure sensing component includes at least one axial pressure sensor 6. A group of axial pressure sensors 6 can be provided, which are attached to the pressure surface at the end of the handle 5; the axial pressure sensor 6 is used to collect pressure sensing data reflecting the magnitude of the axial pressure on the corresponding installation position on the end of the handle 5. The data collected by the axial pressure sensor 6 is sent to the controller, and the controller can also be used to send the axial pressure value to the interactive end for presentation in real time, and determine whether the axial pressure is greater than a preset pressure threshold value 2. When the axial pressure is greater than the preset pressure threshold value 2, the interactive end is controlled to issue an alarm. Of course, in other embodiments, multiple groups of axial pressure sensors 6 can be provided, which are evenly distributed on the pressure surface at the end of the handle 5. When a finger presses the entire or part of the pressure surface of the handle 5, the stress distribution center point of the pressure surface can be analyzed according to the existing algorithm. The axis pressure collected by the center point reflects the axial pressure on the entire measuring instrument.

[0086] In this embodiment, when the medical staff operates the measuring instrument, they press the end of the handle 5 with the belly of one finger, try to avoid the other fingers touching the measuring instrument, and then cover the axial pressure sensor 6 to insert the measuring instrument into the elastic cavity of the patient at a uniform speed. By adding the axial pressure sensor 6 at the end of the measuring instrument, during the insertion stage, the finger will apply an axial thrust to the axial pressure sensor 6, and the thrust is balanced with the axial resistance of the measuring instrument in the elastic cavity, so that it can accurately reflect the maximum circumference of the endoscope or catheter that can be inserted into the elastic cavity at what thrust, and can also issue an alarm when the resistance is too large, so as to further facilitate the medical staff to perform calibration verification.

[0087] (b) When the average pressure value of any group of radial pressure collection units 2 is greater than a preset pressure threshold value, the detection signal of the light sensing component is obtained, and a light-dark dividing line perpendicular to the axis of the detection section 1 is determined according to the light intensity signal of each group of photosensitive units 3.

[0088] Under normal circumstances (i.e., the urethral opening is one of the narrowest parts of the urethra), in order to more accurately determine the position of the urethral opening, this embodiment also provides a method for determining the light-dark boundary. The method for determining the light-dark boundary includes the following steps:

[0089] S21: Acquire the light intensity value collected by each group of light-sensitive units 3 in real time.

[0090] S22: Divide the multiple groups of photosensitive units 3 on the detection segment 1 into regions along the extension direction of the axis of the detection segment 1, thereby obtaining multiple grid-shaped photosensitive regions. The multiple photosensitive regions are all located in the same plane as the axis of the detection segment 1. Figure 7 , Figure 7 The dotted rectangular frame is the photosensitive area.

[0091] S23: Summarize multiple light intensity values ​​in each photosensitive area and calculate the average light intensity value L′ corresponding to each photosensitive area:

[0092]

[0093] Where, L i is the light-sensing intensity value of each group of light-sensing units 3 in each light-sensing area. n is the number of light-sensing units 3 in each light-sensing area, and n≥2. Similar to the principle of summing and averaging the pressure mentioned above, higher light-sensing accuracy can also be achieved here.

[0094] S24: performing difference calculations on the average light intensity values ​​corresponding to each of the two adjacent photosensitive areas, and then obtaining a plurality of difference values ​​for reflecting the magnitude of light intensity fluctuation between the two adjacent photosensitive areas.

[0095] S25: taking the maximum difference among the multiple differences, determining two adjacent target photosensitive areas corresponding to the maximum difference, and then taking the boundary line between the two target photosensitive areas as the light-dark boundary line.

[0096] (c) According to a point position-circumference relationship table of the detection segment 1, according to the intersection point of the light-dark dividing line and the axis of the detection segment 1, the circumference of the detection segment 1 corresponding to the intersection point is obtained by looking up the table, that is, the effective circumference of the elastic cavity.

[0097] In this embodiment, the point-circumference relationship table can be determined according to the shape and size of the detection section 1. The detection section 1 is conical, so the corresponding circumference size can be obtained by measuring different points along the axis of the detection section 1.

[0098] In addition to measuring the circumference of the adult male urethra, the measuring instrument can also be used to measure the female urethra, the urethra of children, or the anus. In addition, it can also measure the circumference of the elastic cavity of animals. The specific design needs to be based on the characteristics of different cavities.

[0099] Example 2

[0100] This embodiment provides a digital medical elastic cavity circumference measurement method, which can be applied to the digital medical elastic cavity circumference measurement instrument in Embodiment 1. The cavity circumference measurement method includes the following steps:

[0101] Insertion phase:

[0102] The detection segment 1 is inserted into the cavity to be detected, and the pressure sensing data at various locations on the extension direction of the surface of the detection segment 1 and the light intensity data at various locations on the axis of the detection segment 1 are collected in real time.

[0103] Measurement phase:

[0104] (a) Obtain the detection signal in the radial pressure sensing component, and analyze in real time the relationship between the multiple average pressure values ​​obtained by each group of radial pressure acquisition units 2 and a preset pressure threshold value 1. (b) When the average pressure value of any group of radial pressure acquisition units 2 is greater than a preset pressure threshold value 1, obtain the detection signal of the light sensing component, and determine a light-dark dividing line perpendicular to the axis of the detection segment 1 based on the light intensity signal of each group of photosensitive units 3. (c) According to a point position-circumference relationship table of the detection segment 1, according to the intersection point of the light-dark dividing line and the axis of the detection segment 1, look up the table to obtain the circumference of the detection segment 1 corresponding to the intersection point, that is, the effective circumference of the elastic cavity.

[0105] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A digital medical elastic cavity circumference measuring instrument, characterized in that: It includes: A detection section (1) is used for being inserted into the cavity to be detected to measure the circumference; The detection section (1) is conical in shape, and the thinner end is an insertion end; A handle (5) fixedly connected to the thicker end of the detection section (1); An axial pressure sensing component, comprising at least one axial pressure sensor (6); the axial pressure sensor (6) is arranged on a pressure-bearing surface at the end of the handle (5); the axial pressure sensor (6) is used to collect pressure sensing data reflecting the magnitude of the axial pressure applied to a corresponding installation position at the end of the handle (5); A radial pressure sensing component, comprising a plurality of groups of radial pressure collection units (2); the plurality of groups of radial pressure collection units (2) are distributed in an array along the extension direction of a detection section (1); each group of radial pressure collection units (2) comprises a plurality of radial pressure sensors (22) distributed in a circumferential manner around the axis of the detection section (1); each radial pressure sensor (22) is arranged on the surface of the detection section (1) and is used to collect pressure sensing data reflecting the magnitude of radial pressure exerted on a corresponding installation position on the detection section (1); A light sensing component, comprising a plurality of groups of photosensitive units (3); the plurality of groups of photosensitive units (3) are all arranged inside the detection section (1) and are linearly distributed along the axis of the detection section (1); each group of photosensitive units (3) is used to collect light intensity data at a corresponding position; and A controller is used to: (a) obtain the detection signal in the radial pressure sensing component, and analyze in real time the magnitude relationship between the multiple average pressure values ​​obtained by each group of radial pressure acquisition units (2) and a preset pressure threshold value one; (b) when the average pressure value of any group of radial pressure acquisition units (2) is greater than a preset pressure threshold value one, obtain the detection signal of the light sensing component, and determine a light-dark dividing line perpendicular to the axis of the detection section (1) based on the light intensity signal of each group of photosensitive units (3); (c) according to a point position-circumference relationship table of the detection section (1), according to the intersection point of the light-dark dividing line and the axis of the detection section (1), look up the table to obtain the circumference of the detection section (1) corresponding to the intersection point, that is, the effective circumference of the elastic cavity.

2. The digital medical elastic cavity circumference measuring instrument according to claim 1 is characterized in that: The controller is also used to control an interactive end to perform real-time feedback according to the detection signal in the radial pressure sensing component; the real-time feedback method includes the following steps: S11: acquiring multiple pieces of pressure sensing data collected by multiple radial pressure sensors (22) in real time; S12: summing up and averaging the various pressure sensing data in each group of radial pressure acquisition units (2), thereby obtaining an average pressure value associated with each group of radial pressure acquisition units (2); S13: Take the maximum pressure value among the average pressure values ​​of each group F max , and the maximum pressure value F max The pressure progress ratio is calculated by analyzing the ratio with the preset pressure threshold. P : In the formula, F 0 is the preset pressure threshold 1; S14: Proportion of pressure progress P The numerical signal is sent to an interactive terminal in real time for presentation, and when the pressure progress ratio reaches 100%, the interactive terminal is controlled to issue an alarm.

3. The digital medical elastic cavity circumference measuring instrument according to claim 2 is characterized in that: The controller is also used to control the interactive end to send the detection signal in the axial pressure sensing component to the interactive end for presentation, and to determine whether the axial pressure is greater than a preset pressure threshold value 2, and to control the interactive end to issue an alarm when the axial pressure is greater than the preset pressure threshold value 2.

4. The digital medical elastic cavity circumference measuring instrument according to claim 1 is characterized in that: The method for determining the light-dark dividing line comprises the following steps: S21: acquiring the light intensity value collected by each group of light-sensitive units (3) in real time; S22: along the extension direction of the axis of the detection section (1), the multiple groups of photosensitive units (3) on the detection section (1) are divided into regions, thereby obtaining a plurality of grid-shaped photosensitive regions; the plurality of photosensitive regions are all located in the same plane as the axis of the detection section (1); S23: Summarize the multiple light intensity values ​​in each photosensitive area to calculate the average light intensity value corresponding to each photosensitive area : In the formula, L i is the light sensitivity intensity value of each group of light sensitive units (3) in each of the light sensitive areas; n is the number of the photosensitive units (3) in each photosensitive area, and n ≥2; Performing difference calculation on the average light intensity values ​​corresponding to each of the two adjacent photosensitive areas, thereby obtaining a plurality of difference values ​​for reflecting the magnitude of light intensity fluctuation between the two adjacent photosensitive areas; The maximum difference among the plurality of differences is taken to determine two adjacent target photosensitive areas corresponding to the maximum difference, and then the boundary line between the two target photosensitive areas is used as the light-dark dividing line.

5. The digital medical elastic cavity circumference measuring instrument according to claim 2 is characterized in that: The interactive end includes a display unit and a voice broadcast unit; the display unit is used to display the value of the pressure progress ratio in real time in the form of text and / or graphics; the voice broadcast unit is used to regularly broadcast voice containing the pressure progress ratio information.

6. The digital medical elastic cavity circumference measuring instrument according to claim 1, characterized in that: Each group of radial pressure collection units (2) further comprises a mounting member 1 (21); the mounting member 1 (21) is annular and is embedded and sleeved on the detection section (1); the outer surface of the mounting member 1 (21) is flush with the surface of the detection section (1) and is connected to a plurality of radial pressure sensors (22).

7. The digital medical elastic cavity circumference measuring instrument according to claim 1 is characterized in that: The radial pressure sensor (22) uses a piezoelectric film.

8. The digital medical elastic cavity circumference measuring instrument according to claim 1 is characterized in that: The light sensing component further comprises a second mounting member (4); the second mounting member (4) is strip-shaped, and its extension direction is parallel to the axis of the detection section (1); one side of the second mounting member (4) is parallel to the axis of the detection section (1), and the side is fixedly connected to the plurality of light sensing units (3).

9. The digital medical elastic cavity circumference measuring instrument according to claim 1, characterized in that: The surface of the detection section (1) is provided with a smooth coating.

10. A digital medical elastic cavity circumference measurement method, characterized in that: The cavity circumference measurement method is applied to the digital medical elastic cavity circumference measuring instrument as claimed in any one of claims 1 to 9; the cavity circumference measurement method comprises the following steps: Insertion phase: Inserting the detection section (1) into the cavity to be detected, and collecting in real time pressure sensing data at various locations along the extension direction of the surface of the detection section (1), as well as light intensity data at various locations along the axis of the detection section (1); Measurement phase: (a) acquiring a detection signal from the radial pressure sensing component, and analyzing in real time the magnitude relationship between a plurality of average pressure values ​​acquired by each group of radial pressure acquisition units (2) and a preset pressure threshold value one; (b) acquiring a detection signal from the light sensing component when the average pressure value of any group of radial pressure acquisition units (2) is greater than a preset pressure threshold value one, and determining a light-dark dividing line perpendicular to the axis of the detection section (1) based on the light intensity signal of each group of photosensitive units (3); (c) according to a point position-circumference relationship table of the detection section (1), according to the intersection point of the light-dark dividing line and the axis of the detection section (1), looking up the table to obtain the circumference of the detection section (1) corresponding to the intersection point, i.e., the effective circumference of the elastic cavity.

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