Peripheral water content detector

Abstract

The utility model relates to detection device technical field discloses human body peripheral water content detection gun, including gun body, the detection cavity and the placement cavity are included in the gun body, the detection cavity is equipped with the open end communication with the outside, and the infrared light component for emitting infrared light line to the open end direction and the infrared light detector for receiving the infrared light line of open end direction reflection back are installed in the detection cavity, the placement cavity installs the battery, the light -emitting control chip and the detection chip, and the battery, light -emitting control chip, infrared light component are connected in proper order, and the battery, infrared light detector, detection chip are connected in proper order, the gun body outer surface still is equipped with the button switch for controlling the detection gun operation and the display screen for showing the detection result, and button switch and light -emitting control chip electric connection, and display screen and detection chip electric connection, to solve the problem that the existing body fluid monitoring precision is not high, and the result interpretation threshold is high.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically to a human peripheral water content detection gun. Background Technology

[0002] Congestive heart failure, also known as heart failure, is the end-stage manifestation of almost all cardiovascular diseases. Its clinical manifestations include impaired ventricular ejection function and impaired systemic / pulmonary return, including symptoms of volume overload such as dyspnea, pulmonary congestion, and pitting edema. This leads to frequent hospitalizations and increases the risk of poor prognosis. Therefore, monitoring and appropriate intervention of body fluids can help improve the prognosis of patients.

[0003] Currently, the method used to accurately observe changes in patient volume is invasive hemodynamic monitoring. This method involves inserting various catheters or probes through the body surface into the heart chambers or blood vessels to directly measure cardiovascular function parameters. This method is technically complex, invasive, and carries certain risks. This monitoring method is only suitable for patients with critical illnesses or those undergoing major surgery, and is not applicable to self-monitoring by ordinary heart failure patients.

[0004] For patients with typical heart failure, non-invasive methods such as weight monitoring and bioelectrical impedance analysis are also used to assess changes in body fluids. Weight monitoring reflects changes in fluid retention by periodically measuring weight; however, weight is influenced by numerous factors, such as diet and excretion, and because individual body composition and metabolism vary, the same weight change may correspond to different water content changes in different individuals, making it inaccurate to rely solely on weight to determine fluid changes. Bioelectrical impedance analysis calculates body water content by measuring the body's resistance to electrical current, but interpreting the results requires specialized knowledge and skills, and the equipment used for bioelectrical impedance analysis is expensive, making it difficult to use. Neither method is suitable for spontaneous fluid monitoring in patients with typical heart failure. Utility Model Content

[0005] The present invention aims to provide a detection gun for ordinary heart failure patients to test the peripheral water content of the human body, so as to solve the problems of low accuracy and high threshold for interpretation of existing body fluid monitoring.

[0006] To solve the above problems, the present invention adopts the following technical solution: a human peripheral water content detection gun, including a gun body, the gun body including a detection cavity and a placement cavity; the detection cavity is provided with an open end communicating with the outside, and an infrared light component for emitting infrared light towards the open end and an infrared light detector for receiving infrared light reflected back from the open end are installed in the detection cavity.

[0007] The placement cavity is equipped with a battery, a light-emitting control chip, and a detection chip. The battery, the light-emitting control chip, and the infrared light component are connected in series. The battery, the infrared light detector, and the detection chip are also connected in series. The outer surface of the gun body is also provided with a button switch for controlling the operation of the detection gun and a display screen for displaying the detection results. The button switch is electrically connected to the light-emitting control chip, and the display screen is electrically connected to the detection chip.

[0008] Through dedicated research, the inventors discovered a correlation between edema index and congestive heart failure. Furthermore, through extensive clinical studies, they found that edema index can serve as a novel biomarker for predicting long-term mortality in patients with chronic heart failure. Higher edema indexes are associated with increased all-cause mortality and cardiovascular mortality.

[0009] Edema index-guided management can be used as a treatment method for patients with congestive heart failure. The edema index is the ratio of peripheral water to total body water. Patients can monitor changes in peripheral water content to determine if the edema index has changed. Based on this, fluid intake or diuretic dosage can be adjusted to achieve better fluid volume management, reduce hospitalization risk, and minimize adverse prognostic effects.

[0010] This method utilizes the strong absorption characteristics of water for near-infrared light in the wavelength range of 700-2500nm. When human tissue is irradiated with near-infrared light, water molecules in the human tissue will absorb some of the energy of the infrared light, and the more water molecules there are, the more they will absorb. By measuring the change in the intensity of infrared light reflected back from the human tissue, the water content in the human body can be determined.

[0011] In practical applications, the opening of the peripheral water content detection gun contacts the human tissue. When the button switch is turned on, the light-emitting control chip controls the battery to supply power to the infrared light component. The infrared light component emits infrared light towards the human tissue. Water molecules inside the component absorb some of the infrared light energy, while the rest is reflected to the infrared light detector. The detection chip analyzes the energy consumption of the infrared light to determine the current peripheral water content and feeds the information back to the display screen. This alerts the patient to any abnormalities in their current peripheral water content and guides them to adjust their water intake or diuretic dosage.

[0012] Meanwhile, this device utilizes a detection cavity to envelop the infrared light component and infrared detector, ensuring that infrared light propagates only between the detection cavity and the skin during detection, reducing infrared light loss. The infrared detector monitors only the infrared light between the detection cavity and the skin, minimizing external interference. The fixed distance from the infrared light component to the opening lowers the user's operational threshold, allowing patients to independently complete accurate tests with visualized results. Furthermore, the mature technology of the infrared light component and related components provides reliable performance and accuracy, while large-scale production keeps manufacturing costs low. This further lowers the barrier to entry for patients, enabling them to independently perform objective and accurate peripheral water content testing and receive timely, accurate, and effective interventions based on edema index, avoiding increased hospitalization risks and worse prognoses due to fluid overload.

[0013] As an improvement, the distance between the infrared light component and the opening end is smaller than the distance between the infrared light detector and the opening end.

[0014] The beneficial effects of this improvement are: due to the compact structure of the human peripheral water content detection gun and the small space inside the detection chamber, the infrared light detector and the infrared light component are installed close to each other, so that the infrared light detector and the infrared light component are set at different heights and staggered, avoiding the light from the infrared light component directly shining on the infrared light detector to reduce errors. In addition, the infrared light component is closer to the skin, shortening the distance between the light source and the skin and reducing the loss during the light propagation process.

[0015] As an improvement, a mounting post extending towards the opening end is provided on the side of the detection cavity facing the opening end, and the infrared light component is embedded in the mounting post.

[0016] The beneficial effects of this improvement are: by having the mounting post surround the infrared light component, the infrared light is more concentrated and emitted towards the opening end, reducing the amount of light that travels directly to the infrared detector without being reflected off the skin, thus further improving measurement accuracy.

[0017] As an improvement, the infrared light components are in three groups, which emit infrared light of different wavelengths. The infrared light wavelength of one group is used as the measurement wavelength, and the infrared light wavelengths of the other two groups are used as reference wavelengths.

[0018] The beneficial effects of this improvement are as follows: considering that factors such as the surface condition, color, and structure of different patients' skin can interfere with moisture measurement, a three-wavelength method is adopted, namely, one wavelength that is strongly absorbed by water, i.e., the measurement wavelength, and two wavelengths that are not strongly absorbed by water, i.e., the reference wavelengths. The reference wavelength serves as a blank control. The ratio of the energy of the reflected light from these three wavelengths is detected and calculated, which can eliminate or reduce interference caused by background noise, scattering, or other non-specific absorption. This correction can improve the accuracy and reliability of the measurement.

[0019] As an improvement, the detection medium of the infrared light detector is embedded inside the detection cavity, and the detection medium of the infrared light detector is in a ring shape centered on the mounting post.

[0020] The beneficial effects of this improvement are: all three sets of infrared light components are set inside the mounting column, so that the incident angle of the three sets of light rays emitted to the skin is consistent; the detection medium of the infrared light detector is in a ring shape centered on the mounting column, ensuring that the infrared light detector can receive reflected light.

[0021] As an improvement, the infrared light component includes an LED light source, a convex lens, a semiconductor optical amplifier, and a concave lens, wherein the infrared light emitted by the LED light source passes through the convex lens, the semiconductor optical amplifier, and the concave lens in sequence.

[0022] The beneficial effects of this improvement are: the infrared light emitted by the LED light source of the corresponding wavelength is focused by the convex lens, making the light more concentrated, thereby increasing the light density and radiation intensity. The focused infrared light enters the semiconductor optical amplifier, which uses the special properties of semiconductor materials to amplify the light and enhance the radiation intensity. The infrared light amplified by the semiconductor optical amplifier is diffused by the concave lens, making the light distribution more uniform and avoiding local overheating problems. Furthermore, by adjusting the curvature and position of the concave lens, the degree of light divergence and diffusion range can be controlled.

[0023] This infrared light component structure can enhance the intensity of infrared radiation, improve detection accuracy, and control the light diffusion range, ensuring that the infrared light detector can effectively receive the infrared light reflected back from the skin.

[0024] As an improvement, the inner wall of the detection cavity is concave arc-shaped towards the opening end, and the inner wall of the detection cavity is white.

[0025] The beneficial effects of this improvement are: the curved inner wall allows scattered light to be better reflected back to the center so that the light can converge, and the white inner wall has the weakest ability to absorb infrared light and the highest reflectivity, which can reduce the energy loss of light when it is reflected by the inner wall.

[0026] As an improvement, the measurement wavelength is 1940 nm, and the reference wavelengths are 1310 nm and 1550 nm.

[0027] The beneficial effects of this improvement are: the measurement wavelength should be selected based on the strong absorption of water molecules to ensure sensitivity to water content; the reference wavelength should be selected based on the weak absorption of water but the weak response to other interfering factors; the reference wavelength should be selected as close as possible to the measurement wavelength to reduce measurement errors caused by changes in light source or skin properties; at the wavelength of 1940nm, water absorbs light strongly, and 1310nm and 1550nm are used as reference wavelengths that are close to the measurement wavelength of 1940nm and have weak absorption of water.

[0028] As an improvement, the opening end is provided with a thermocouple sensor for detecting skin temperature on the skin contact surface. The thermocouple sensor is electrically connected to the detection chip, and the detection chip is electrically connected to the light-emitting control chip.

[0029] The beneficial effects of this improvement are as follows: while detecting moisture content, the thermocouple sensor simultaneously detects skin temperature upon contact with the skin. The detection chip determines whether the current skin temperature is within a threshold range. If it is not within the threshold range, the detection chip alerts the patient to an abnormal temperature, thus avoiding inaccurate moisture content detection due to large fluctuations in skin temperature. When the thermocouple sensor detects that the skin temperature has risen to a certain threshold during the measurement process, the detection chip communicates with the light-emitting control chip to stop the infrared light component from working, preventing the patient from being burned due to repeated and prolonged testing.

[0030] As an improvement, a charging port is provided on the gun body away from the opening end, and the charging port is electrically connected to the battery.

[0031] The beneficial effects of this improvement are: the battery can be charged through the charging port, the charging port is moved away from the open end, the interference between detection and charging is reduced, and the patient can be tested while charging. Attached Figure Description

[0032] Figure 1 This is a half-sectional view of an embodiment of the present utility model.

[0033] Figure 2 This is a schematic diagram of the detection cavity of this utility model.

[0034] Figure 3 This is a schematic diagram of the structure of the infrared light component of this utility model. Detailed Implementation

[0035] The following detailed description illustrates the specific implementation methods:

[0036] The reference numerals in the accompanying drawings include: gun body 1, detection cavity 2, infrared light assembly 3, infrared light detector 4, skin 5, button switch 6, display screen 7, mounting post 8, charging port 9, LED light source 10, convex lens 11, semiconductor light amplifier 12, concave lens 13, thermocouple sensor 14.

[0037] Example

[0038] The basics are as follows: Figure 1 As shown, a human peripheral water content detection gun includes a gun body 1, which is a cylindrical shell. The gun body 1 includes a detection chamber 2 and a placement chamber. The detection chamber 2 has an open end that communicates with the outside. An infrared light component 3 for emitting infrared light towards the open end and an infrared light detector 4 for receiving infrared light reflected back from the open end are installed in the detection chamber 2. The open end is a smooth and flush round opening, and during detection, the open end is in close contact with the skin 5.

[0039] The cavity contains a battery, a light-emitting control chip, and a detection chip. The battery, the light-emitting control chip, and the infrared light component 3 are connected in series. The battery, the infrared light detector 4, and the detection chip are also connected in series. The outer surface of the gun body 1 is also equipped with a push-button switch 6 for controlling the operation of the detection gun and a display screen 7 for displaying the detection results. The push-button switch 6 is electrically connected to the light-emitting control chip, and the display screen 7 is electrically connected to the detection chip.

[0040] The light-emitting control chip is used to receive the electrical signal sent by the push-button switch 6 and control the battery to supply current to the infrared light component 3 so that the infrared light component 3 emits infrared light to irradiate the skin; the detection chip is used to receive the transmitted data sent by the infrared light detector 4, analyze and calculate the data, and transmit the calculation results to the display screen 7, which then visualizes the data.

[0041] The detection chip has a storage function, which can store relevant data on the previous water content. By comparing the current water content with the previous water content, it can provide feedback on the difference in water content to the patient, making the feedback data more accurate and easier to understand.

[0042] The light-emitting control chip and detection chip can be selected from control chips such as STC89C52RC and ATmega328P, which have certain computing and storage capabilities and are inexpensive, making them suitable for use in confined spaces or portable devices.

[0043] The distance between the infrared light component 3 and the opening end is less than the distance between the infrared light detector 4 and the opening end. A mounting post 8 extending towards the opening end is provided on the side of the detection cavity 2 facing the opening end, and the infrared light component 3 is embedded within the mounting post 8. The inner wall of the detection cavity 2 has a concave arc surface facing the opening end, and the inner wall of the detection cavity is white. The detection medium of the infrared light detector 4 is embedded inside the detection cavity 2, and the detection medium of the infrared light detector 4 is in a ring shape centered on the mounting post 8.

[0044] In this example, the distance between the infrared detector 4 and the skin 5 is set to 5cm; a charging port 9 is provided on the gun body 1 away from the opening end, and the charging port 9 is electrically connected to the battery.

[0045] As attached Figure 2 As shown, there are three sets of infrared light components 3, each emitting infrared light of different wavelengths. One set of infrared light components 3 emits infrared light at a wavelength used for measurement, while the other two sets emit infrared light at wavelengths used for reference. The wavelength of the set of infrared light components 3 used for measurement is 1940 nm, while the wavelengths of the other two sets used for reference are 1310 nm and 1550 nm, respectively. The three sets of infrared light components 3 are equally sized and distributed within the mounting column 8.

[0046] A thermocouple sensor 14 for detecting skin temperature is provided on the contact surface between the open end and the skin 5. The thermocouple sensor 14 is electrically connected to the detection chip, and the detection chip is electrically connected to the light-emitting control chip. The thermocouple sensor 14 detects the skin temperature of the patient within the range of infrared light irradiation by contacting the skin. The thermocouple sensor 14 transmits the collected data to the detection chip, which determines whether the current temperature value is within a threshold range. When the temperature value is not within the threshold range, the detection chip displays an abnormal temperature to the patient, which can avoid inaccurate water content detection due to large fluctuations in skin temperature. When the thermocouple sensor 14 detects that the skin temperature rises to a certain threshold, such as 30°C, the detection chip communicates with the light-emitting control chip via electrical signals, and the light-emitting control chip controls the infrared light component 3 to stop working, avoiding skin burns caused by repeated and prolonged detection.

[0047] As attached Figure 3 As shown, the infrared light component 3 includes an LED light source 10, a convex lens 11, a semiconductor light amplifier 12, and a concave lens 13. The infrared light emitted by the LED light source 10 passes through the convex lens 11, the semiconductor light amplifier 12, and the concave lens 13 in sequence.

[0048] The LED light source 10 emits infrared light of the corresponding wavelength, which is focused by the convex lens 11 to concentrate the light, thereby increasing the light density and radiation intensity. The focused infrared light enters the semiconductor optical amplifier 12, which uses the special properties of semiconductor materials to amplify the light and enhance the radiation intensity. The infrared light amplified by the semiconductor optical amplifier 12 is diffused by the concave lens 13, making the light distribution more uniform and avoiding local overheating problems.

[0049] The specific implementation process is as follows:

[0050] When the opening of the peripheral water content detection gun contacts the skin 5, the button switch 6 is turned on. The light-emitting control chip controls the battery to supply power to the infrared light component 3. The three sets of infrared light components 3 emit infrared light in sequence and shine it onto the skin 5. The skin 5 absorbs part of the infrared light energy, and the rest of the light is reflected to the infrared light detector 4. The detection chip determines the current peripheral water content of the human body by judging the energy consumption of the infrared light and detecting and calculating the ratio of the energy of the reflected light of the three wavelengths. Then, the current peripheral water content of the human body is compared with the previous peripheral water content to obtain the current water content difference. The corresponding information is fed back to the display screen 7, so that patients with heart failure can measure the peripheral tissue water content at home, thereby guiding the patient's water intake and the dosage of diuretics.

[0051] The light emission control chip has a timer that controls the duration of light emission from the infrared light components, so that the three sets of infrared light components 3 of the human peripheral water content detection gun run in the same order and for the same preset duration each time. When the preset duration ends, the light emission control chip automatically controls the infrared light components to switch or stop emitting light.

[0052] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A human peripheral water content detection gun, characterized in that: The gun body includes a detection chamber and a placement chamber. The detection chamber has an open end that communicates with the outside. An infrared light component for emitting infrared light toward the open end and an infrared light detector for receiving infrared light reflected back from the open end are installed inside the detection chamber. The placement cavity is equipped with a battery, a light-emitting control chip, and a detection chip. The battery, the light-emitting control chip, and the infrared light component are connected in series. The battery, the infrared light detector, and the detection chip are also connected in series. The outer surface of the gun body is also provided with a button switch for controlling the operation of the detection gun and a display screen for displaying the detection results. The button switch is electrically connected to the light-emitting control chip, and the display screen is electrically connected to the detection chip. The infrared light components consist of three sets, each emitting infrared light of different wavelengths. One set of infrared light components emits infrared light wavelengths as the measurement wavelength, while the other two sets emit infrared light wavelengths as reference wavelengths.

2. The human peripheral water content detection gun according to claim 1, characterized in that: The distance between the infrared light component and the opening end is less than the distance between the infrared light detector and the opening end.

3. The human peripheral water content detection gun according to claim 2, characterized in that: The detection cavity has a mounting post extending towards the opening end on one side, and the infrared light component is embedded in the mounting post.

4. The human peripheral water content detection gun according to claim 3, characterized in that: The detection medium of the infrared light detector is embedded inside the detection cavity, and the detection medium of the infrared light detector is in a ring shape centered on the mounting post.

5. The human peripheral water content detection gun according to claim 1, characterized in that: The infrared light component includes an LED light source, a convex lens, a semiconductor optical amplifier, and a concave lens. The infrared light emitted by the LED light source passes through the convex lens, the semiconductor optical amplifier, and the concave lens in sequence.

6. The human peripheral water content detection gun according to claim 1, characterized in that: The inner wall of the detection cavity is concave arc-shaped towards the opening end, and the inner wall of the detection cavity is white.

7. The human peripheral water content detection gun according to claim 1, characterized in that: The measurement wavelength is 1940 nm, and the reference wavelengths are 1310 nm and 1550 nm.

8. The human peripheral water content detection gun according to claim 1, characterized in that: The opening end is provided with a thermocouple sensor for detecting skin temperature on the skin contact surface. The thermocouple sensor is electrically connected to the detection chip, and the detection chip is electrically connected to the light-emitting control chip.

9. The human peripheral water content detection gun according to claim 1, characterized in that: A charging port is provided on the gun body away from the opening end, and the charging port is electrically connected to the battery.

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