Thickening agent screening method and system for people with dysphagia

Abstract

The present application provides a thickening agent screening method and system for people with dysphagia. The method comprises the following steps: constructing thickening fluid systems having the same IDDSI level; acquiring performance parameters of key indicators of thickening agents in the thickening fluid systems; constructing a composite score weighting model for the swallowing performance of the thickening agents; inputting the performance parameters of the key indicators of the thickening agents in the thickening fluid systems having the same IDDSI level to the composite score weighting model, so as to acquire composite scores of the swallowing performance of the thickening agent compositions; and on the basis of the acquired composite scores of the swallowing performance of the thickening agents, screening for a thickening agent having the optimal swallowing performance. In the present application, on the basis of the thickening fluid systems having the same IDDSI level, swallowing-related characteristics of the thickening agents in the thickening fluid systems are determined and further screened so as to acquire an optimal thickening agent, thereby breaking through the limitation of selecting a proper thickening agent at IDDSI levels, and providing richer and more reasonable diet matching for people with dysphagia.

Description

Thickener screening method and system for people with dysphagia Technical Field

[0001] The present application relates to the technical field of food screening for people with dysphagia, and specifically to a method and system for screening thickeners for people with dysphagia. Background Art

[0002] Increased life expectancy and declining mortality rates worldwide are leading to an accelerating aging population. This shift in population age structure is driving significant demand for healthcare products and services. Due to physiological changes such as decreased chewing ability, decreased muscle strength, and sluggish neural control, elderly individuals may experience delayed epiglottal closure and insufficient tongue muscle strength to push the food bolus, leading to swallowing difficulties (Giura et al. 2021, Sun-Waterhouse et al. 2021). Dysphagia has numerous adverse effects, including aspiration, coughing, aspiration pneumonia, malnutrition, and dehydration. Widespread use of thickeners or texture modification techniques that influence food physical properties (e.g., reducing hardness and increasing cohesion) can reduce the likelihood of these adverse effects and broaden dietary options for individuals with swallowing difficulties (Rodd et al. 2021).

[0003] Currently, most dysphagia foods are developed based on the dietary texture scale of the International Dysphagia Diet Standardization Initiative (IDDSI), with powdered thickeners predominating and evaluated using the IDDSI (International Dysphagia Diet Standardization Initiative) scale. Thickening specific fluid foods requires selecting an appropriate thickener combination. The widely used IDDSI scale, which uses a simple gravity flow test to rank fluid texture (viscosity), can be used as a method for evaluating thickened fluid systems. However, factors affecting fluid swallowing safety include density and surface tension, in addition to viscosity. Studies (Zhong Lei et al., 2018) have shown that thickened fluids with the same IDDSI grade can exhibit significant differences in density, surface tension, and modulus. Therefore, for companies and research institutes developing easy-to-swallow products, selecting appropriate thickeners based solely on IDDSI grades presents significant limitations. Summary of the Invention

[0004] The present application provides a thickener screening method and system for people with dysphagia, which can solve the technical problem in the prior art of obvious limitations in selecting suitable thickeners for dysphagia based solely on the IDDSI grade.

[0005] In a first aspect, the present application provides a method for screening thickeners for people with dysphagia, comprising the following steps:

[0006] Construct a thickening fluid system with the same IDDSI grade;

[0007] Obtain the performance parameters of key indicators of each thickener in the thickening fluid system;

[0008] To construct a weighted model of comprehensive scores for thickener swallowing performance;

[0009] Input the performance parameters of key indicators of each thickener in the thickened fluid system with the same IDDSI grade into the comprehensive score weighted model of thickener swallowing performance to obtain the comprehensive score of swallowing performance of each thickener;

[0010] Based on the obtained comprehensive scores of swallowing performance of each thickener, the thickener with the best swallowing performance was screened.

[0011] In combination with the first aspect, in one embodiment, the performance parameters for obtaining the key indicators of each thickener in the thickening fluid system include surface tension, zero shear viscosity, η50, hardness, cohesion, solid content, density, yield stress, and adhesion.

[0012] In conjunction with the first aspect, in one embodiment, constructing a comprehensive score weighted model for thickener swallowing performance includes:

[0013] Establish a judgment matrix;

[0014] Perform consistency check on the judgment matrix and obtain consistency check results;

[0015] When the consistency check of the matrix passes, the weight coefficient of the key indicator is obtained;

[0016] The values ​​of key indicators were normalized, and a comprehensive score weighted model for thickener swallowing performance was established based on the weight coefficient of each key indicator.

[0017] In conjunction with the first aspect, in one embodiment, establishing the judgment matrix includes:

[0018] Obtain a comparison table of element importance descriptions and levels;

[0019] Using the comparison table of element importance description and importance level, a judgment matrix of performance indicators for thickening fluid system is established.

[0020] In conjunction with the first aspect, in one embodiment, performing a consistency check on the judgment matrix and obtaining a consistency check result includes:

[0021] Obtain the product of the importance levels of the key indicators in each row of the judgment matrix relative to other key indicators, and obtain the product of the importance levels of the key indicators;

[0022] Calculate the nth root of the product of the importance levels of the key indicators, where n is the total number of key indicators;

[0023] Obtain the characteristic vector of the nth root of the product of the importance levels of the key indicators;

[0024] Performing vector regularization processing on the acquired feature vector to obtain a vector regularization result;

[0025] According to the obtained vector regularization result, the judgment matrix is ​​checked for consistency to obtain a consistency check calculation value;

[0026] Obtain the consistency check result of the judgment matrix based on the consistency comparison check value and the consistency check standard value.

[0027] In combination with the first aspect, in one embodiment, the thickener combination used to construct the thickened fluid system with the same IDDSI grade is selected from one or more of SS1, SS2, carboxymethyl cellulose, xanthan gum and guar gum.

[0028] In a second aspect, the present application provides a thickener screening system for people with dysphagia, comprising:

[0029] System building module, used to build thickening fluid systems with the same IDDSI level;

[0030] Performance parameter acquisition module, used to obtain the performance parameters of key indicators of each thickener in the thickening fluid system

[0031] A model building module for constructing a comprehensive score weighted model of thickener swallowing performance;

[0032] a comprehensive score acquisition module, in communication with the performance parameter acquisition module and the model building module, for inputting the performance parameters of the key indicators of each thickener in a thickening fluid system with the same IDDSI grade into a comprehensive score weighted model of thickener swallowing performance to obtain a comprehensive score of the swallowing performance of each thickener;

[0033] The screening module is in communication with the comprehensive score acquisition module and is used to screen the thickener with the best swallowing performance based on the acquired comprehensive scores of the swallowing performance of each thickener.

[0034] In conjunction with the second aspect, in one embodiment, the model building module includes:

[0035] A judgment matrix establishing unit, used for establishing a judgment matrix;

[0036] A consistency check module is configured to establish a unit communication connection with the judgment matrix, and is configured to perform a consistency check on the judgment matrix and obtain a consistency check result;

[0037] A weight coefficient acquisition unit, in communication with the consistency check module, for acquiring the weight coefficient of the key indicator when the consistency check of the matrix passes;

[0038] The model building unit is in communication with the weight coefficient acquisition unit and is used to normalize the values ​​of the relationship indicators and establish a comprehensive score weighted model for thickener swallowing performance based on the weight coefficients of each key indicator.

[0039] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0040] The thickener screening method for people with dysphagia provided in this application measures and further screens the swallowing-related characteristics of each thickener in the thickened fluid system based on the same IDDSI grade to obtain the best thickener, breaking through the limitations of selecting suitable thickeners based on IDDSI grade, and is conducive to providing people with dysphagia with a richer and more reasonable diet combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG1 is a schematic diagram of a method flow chart of a thickener screening method for people with dysphagia provided in an embodiment of the present application;

[0042] FIG2 is a diagram showing a simulated swallowing situation of the swallowing performance of different thickeners provided in an embodiment of the present application;

[0043] FIG3 is a functional module block diagram of the thickener screening system for people with dysphagia in this application. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 this application.

[0045] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0046] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0047] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0048] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0049] In the first aspect, referring to FIG1 , this application provides a method for screening thickeners for people with dysphagia, comprising the following steps:

[0050] Step S1, constructing a thickening fluid system with the same IDDSI level;

[0051] Step S2, obtaining performance parameters of key indicators of each thickener in the thickening fluid system;

[0052] Step S3, constructing a comprehensive score weighted model for thickener swallowing performance;

[0053] Step S4: inputting the performance parameters of key indicators of each thickener in the thickening fluid system with the same IDDSI grade into the comprehensive score weighted model of thickener swallowing performance to obtain the comprehensive score of swallowing performance of each thickener;

[0054] Step S5: screening a thickener with the best swallowing performance according to the obtained comprehensive swallowing performance scores of the thickeners.

[0055] The thickener screening method for people with dysphagia provided in this application measures and further screens the swallowing-related characteristics of each thickener in the thickened fluid system based on the same IDDSI grade to obtain the best thickener, breaking through the limitations of selecting suitable thickeners based on IDDSI grade, and is conducive to providing people with dysphagia with a richer and more reasonable diet combination.

[0056] In one embodiment, according to clinical observations (Su et al 2018), for patients with mild dysphagia, a thickened fluid with an IDDSI grade of 1-2 can improve their swallowing safety; for patients with moderate or severe dysphagia (who can ingest food orally), a low-viscosity (IDDSI grade 1-2) thickened fluid may cause choking, a high-viscosity (IDDSI grade 4) thickened fluid easily causes oropharyngeal residue, and a relatively high-viscosity (IDDSI grade 3) thickened fluid can reduce the risk of aspiration and oropharyngeal residue. In step S1, the thickener combination in constructing a thickened fluid system with the same IDDSI grade is selected from one or more of commercially available thickener 1 (modified starch base, SS1), commercially available thickener 2 (modified starch and gum base compound, SS2), carboxymethyl cellulose (CMC), xanthan gum (XG), and guar gum (GG).

[0057] In a more specific embodiment, the step S1, constructing a thickening fluid system with the same IDDSI level, is specifically implemented as follows:

[0058] By controlling the amount of thickener added, the IDDSI grade of each thickened fluid was made to be level 3 (9 mL remaining in the syringe), and the solid content required for each thickened fluid system to achieve an IDDSI grade of level 3 was determined;

[0059] More specifically, weigh the thickener powder. For commercially available thickeners, accurately convert the weight (g) according to the product label instructions. Prepare a pre-weighed amount of deionized water in a beaker and pour it into the beaker placed on a magnetic stirring device. Turn on the device to create a vortex. Gradually add the weighed thickener to the liquid vortex. Stir continuously with a magnetic stirrer at a fixed speed for a fixed time to ensure that the thickener is significantly dissolved. Let the solution stand for 10 minutes, then stir at a similar shear rate for 30 seconds.

[0060] Remove the needle and plunger from a BDTM 10mL syringe and place it upright. Block the syringe tip with your finger and add the sample solution to the syringe to the 10mL mark. Remove any bubbles from the syringe tip and adjust the syringe volume to the 10mL mark. Remove your finger and press the timer. Observe and record the remaining volume of the sample solution in the syringe after 10 seconds. Repeat this test three times and take the average value (Hanson et al. 2019). After measuring the IDDSI, adjust the level accordingly, maintaining the IDDSI level of the fluid thickened with each thickener at level 3 (9mL of fluid remaining in the syringe).

[0061] In one embodiment, the performance parameters of the key indicators of each thickener in the thickened fluid system obtained in step S2 include surface tension, zero shear viscosity, η50, hardness, cohesion, solid content, density, yield stress, and adhesion.

[0062] In a more specific embodiment, in step S2, obtaining the performance parameters of key indicators of each thickener in the thickening fluid system:

[0063]

Solid content of thickening fluid system

[0064] Obtained by weighing in step S1.

[0065] The density of the thickened fluid system is determined as follows:

[0066] Use a densitometer to measure the density of different thickened fluids. Place 300mL of the thickened fluid sample in a transparent glass container. Float a densitometer with a range of 1.000–1.100kg / m³ in the fluid. Once the densitometer stabilizes and no longer sinks, record the densitometer reading corresponding to the liquid surface. This is the density of the thickened fluid.

[0067] [The surface tension of the thickening fluid system is determined as follows]

[0068] Principle: Surface tension is a property of a liquid's surface that resists external forces due to the cohesive forces within its molecules. During swallowing, the stretching of a food bolus is often accompanied by surface deformation, making surface tension a key factor influencing swallowing.

[0069] Method: Each sample was placed in a glass beaker and allowed to stabilize for approximately 3 hours (brown rice paste was allowed to stabilize for 30 minutes) to reach equilibrium. A tensiometer was used to measure the force required to pull a platinum-iridium plate from the fluid surface. Surface tension was calculated using the following equation: γ = F / (cosθ × l) (1)

[0070] where γ is the surface tension (mN / m), l is the length (m), F is the force (mN), and θ is the contact angle (°).

[0071] Table 1 Solid content, density and surface tension of different thickening fluid systems at IDDSI level 3

[0072] Note: SS1 and SS2 in the sample names represent two commercially available thickeners, CMC represents carboxymethyl cellulose, XG represents xanthan gum, and GG represents guar gum. Data are expressed as mean ± standard deviation.

[0073] The steady-state rheological properties of the thickening fluid system were determined as follows to determine the yield stress and zero shear viscosity.

[0074] Principle: The rheology of the fluid and the propulsive forces exerted by the oropharyngeal musculature work together to achieve a safe swallowing process. Based on this coordination, the rheology of the fluid is considered the most important aspect of swallowing disorder management (Zargaraan et al 2013). The magnitude of the zero shear viscosity is a macroscopic indicator of the microscopic conformation of the biopolymer ( et al 2008), it may be related to the perceived viscosity at near-resting state, which typically occurs when the fluid is first received by the tongue.

[0075] Method: Steady shear rheological tests were performed using a rotational rheometer. A 40 mm diameter aluminum cone and plate were used, and the test was conducted at 25°C. The test was allowed to stand for 2 minutes before each test to allow for equilibrium. The test shear rate ranged from 1 to 1000 s. -1 The shear viscosity and shear stress under τ are calculated, and the yield stress is fitted using the Herschel-Bulkley model (Equation 2): τ=τ0+kγ n (2)

[0076] Where τ0 is the yield stress (Pa); k is the consistency coefficient (Pa·sn); γ is the shear rate (s -1 ); n is the flow index.

[0077] The shear viscosity at a shear rate of 0.001–1000 s-1 was selected for testing, and the zero shear viscosity was fitted using the Carreau model (Equation 3).

[0078] Where η is the apparent viscosity (Pa·s); η0 is the zero shear viscosity (Pa·s); η ∞ is the infinite shear viscosity (Pa·s); λ is the time constant; γ is the shear rate (s -1 ); n is the flow index.

[0079] Table 2 Yield stress and η of commercial thickening fluids 50 and zero shear viscosity (IDDSI level 3)

[0080] Note: SS1 and SS2 in the sample names represent two commercially available thickeners, CMC represents carboxymethyl cellulose, XG represents xanthan gum, and GG represents guar gum. Data are expressed as mean ± standard deviation.

[0081] The textural properties of the thickened fluid system were determined as follows to determine hardness, cohesion and adhesion.

[0082] Principle: Cohesion describes the degree of mechanical force required to break the internal structure of a material and can be described as the strength of the internal bonds that make up the main system of the product (Szczesniak 1963). Fluids with low cohesion are at risk of breaking (or splashing) into multiple droplets, which may lead to aspiration. In addition, there is a risk that some fluid may remain in the pharynx, requiring multiple swallows to clear the residue, which may cause muscle fatigue and increase the risk of aspiration. However, it should be noted that fluids with too high cohesion are not good for patients with swallowing disorders. Excessive cohesion may cause difficulty in swallowing due to high resistance to tensile deformation, especially for those who have weak tongue muscles and can only generate low oral pressure.

[0083] Method: Texture properties were evaluated using a physical analyzer (TA.XT.Plus) by performing a reverse extrusion test using a 5 kg load cell at room temperature of 25°C. An extrusion disc (35 mm) was located in the center of a container containing 100 mL of sample, and the disc penetrated the sample to a depth of 20 mm at a test speed of 0.5 mm / s. The maximum force (g) used to reach this depth is a measure of hardness. When the probe is pulled up at a speed of 0.5 mm / s, the maximum negative force is an indication of cohesion. Surface adhesion was determined by pulling the disc toward the sample at a speed of 0.5 mm / s. The disc was then fixed to the sample surface for 30 seconds and pulled away at a speed of 2 mm / s. The force (g) required to remove the disc from the sample indicates surface adhesion.

[0084] Table 3 Hardness, adhesion and cohesion of thickened fluid (IDDSI level 3)

[0085] Note: SS1 and SS2 in the sample names represent two commercially available thickeners, CMC represents carboxymethyl cellulose, XG represents xanthan gum, and GG represents guar gum. Data are expressed as mean ± standard deviation.

[0086] In one embodiment, the step S3 of constructing a comprehensive score weighted model for thickener swallowing performance includes:

[0087] S31, establishing a judgment matrix;

[0088] S32, performing consistency check on the judgment matrix to obtain a consistency check result;

[0089] S33. When the consistency check of the matrix passes, the weight coefficient of the key indicator is obtained;

[0090] S34. Normalize the values ​​of the key indicators and establish a comprehensive score weighted model for the thickener swallowing performance based on the weight coefficient of each key indicator.

[0091] In one embodiment, the step S31 of establishing a judgment matrix includes:

[0092] S311. Obtain a comparison table of element importance descriptions and levels, as shown in Table 4:

[0093] Table 4 Element importance ratio table

[0094] S312. Using the comparison table of element importance descriptions and importance levels, a judgment matrix of performance indicators for the thickening fluid system is established, as shown in Table 5:

[0095] Table 5 Judgment matrix of key indicators of thickeners

[0096] In one embodiment, the step S32 of performing a consistency check on the judgment matrix and obtaining a consistency check result includes:

[0097] Get the product of the importance level of each key indicator in each row of the judgment matrix relative to other key indicators, and get the product of the importance level of the key indicators n is the number of indicators, a i,j Represents the element in row i and column j of A.

[0098] Calculate the nth root of the product of the importance levels of key indicators n is the number of indicators; obtain the characteristic vector of the nth root of the product of the importance levels of key indicators Calculate the characteristic roots of matrix A, that is Calculate the maximum eigenvalue λmax of the judgment matrix;

[0099] Perform vector regularization on the acquired feature vector to obtain the vector regularization result:

[0100] Based on the obtained vector regularization results, perform consistency check on the judgment matrix and obtain the consistency check calculation value:

[0101] CI = (λmax-n) / (n-1),

[0102] in,

[0103] Where (AW)i is the i-th element of AW;

[0104] According to the consistency comparison check value and the consistency check standard value, the consistency check result of the judgment matrix is ​​obtained. Specifically, the random consistency standard value is queried. When CR = CI / RI = 0.029 / 1.451 = 0.02 < 0.1, where CI = (λmax-n) / (n-1), where CI is the consistency index, CR is the consistency ratio, and RI is the random consistency index, when CR = CI / RI < 0.1, it is determined that the established judgment matrix has satisfactory consistency. The weight coefficients of each key indicator are calculated based on the judgment matrix with satisfactory consistency to screen the thickener with the best swallowing performance.

[0105] In one embodiment, S34 , the values ​​of the key indicators are normalized, and a comprehensive score weighted model for thickener swallowing performance is established based on the weight coefficient of each key indicator.

[0106] Table 6 Normalization of key indicators of thickeners

[0107] Note: SS1 and SS2 in the sample names are two commercially available thickeners, CMC is carboxymethyl cellulose, XG is xanthan gum, and GG is guar gum.

[0108] Table 7 Weight coefficients of key indicators of thickeners

[0109] According to the weight coefficient of each key indicator, the comprehensive score weighted model of thickener swallowing performance is established as follows:

[0110] Y = 0.128 × surface tension + 0.177 × zero shear viscosity + 0.177 × η50 + 0.054 × hardness + 0.063 × cohesion - 0.064 × solid content - 0.098 × density - 0.113 × yield stress - 0.126 × adhesion.

[0111] Wherein, Y is the comprehensive score of swallowing performance of each thickener.

[0112] The comprehensive scores of swallowing performance for each thickener are shown in Table 8.

[0113] Table 8 Comprehensive score of swallowing performance of thickeners

[0114] Note: SS1 and SS2 in the sample names are two commercially available thickeners, CMC is carboxymethyl cellulose, XG is xanthan gum, and GG is guar gum.

[0115] As shown in Table 8, the thickener SS1 had the highest comprehensive score for swallowing performance, followed by CMC, GG, XG, and SS2. Therefore, the thickener with the best swallowing performance was SS1.

[0116] In one embodiment, after the step S5 of screening the thickener with the best swallowing performance according to the obtained comprehensive swallowing performance scores of the thickeners, the following steps are further included:

[0117] Verify the swallowing properties of the thickener, specifically by:

[0118] Computer simulation was used to simulate the swallowing process of five thickeners, and their swallowing performance was analyzed. As shown in Figure 2, when the fluid is swallowed near the epiglottis, SS2 has obvious splashing, the SS1 thickening fluid has a strong cohesive force, and the fluid is more aggregated, followed by CMC, and the states of GG and XG are similar. Analysis of the aspiration particles in the late stage of fluid swallowing found that SS1, CMC and GG had no aspiration phenomenon, XG had fewer aspiration particles, and SS2 had obvious aspiration. Based on the aspiration of the thickened fluid and the state of the fluid near the epiglottis, it can be concluded that the thickeners with better swallowing properties are ranked in the following order: SS1, CMC, GG, XG, SS2. This order is consistent with the comprehensive score results of the swallowing performance mentioned above, proving that the thickener screening method for people with swallowing disorders provided in this application is effective.

[0119] In the second aspect, please refer to Figure 3. The present application provides a thickener screening system for people with swallowing disorders, including a system establishment module 100, a performance parameter acquisition module 200, a model construction module 300, a comprehensive score acquisition module 400 and a screening module 500. The system establishment module 100 is used to construct a thickening fluid system with the same IDDSI level; the performance parameter acquisition module 200 is used to obtain the performance parameters of the key indicators of each thickener in the thickening fluid system; the model construction module 300 is used to construct a comprehensive score weighted model for the swallowing performance of the thickener; the comprehensive score acquisition module 400 is communicated with the performance parameter acquisition module 200 and the model construction module 300, and is used to input the performance parameters of the key indicators of each thickener in the thickening fluid system with the same IDDSI level into the comprehensive score weighted model for the thickener swallowing performance to obtain the comprehensive score of the swallowing performance of each thickener; the screening module 500 is communicated with the comprehensive score acquisition module 400, and is used to screen the thickener with the best swallowing performance based on the obtained comprehensive score of the swallowing performance of each thickener.

[0120] In one embodiment, the model building module includes:

[0121] A judgment matrix establishing unit, used for establishing a judgment matrix;

[0122] A consistency check module is configured to establish a unit communication connection with the judgment matrix, and is configured to perform a consistency check on the judgment matrix and obtain a consistency check result;

[0123] A weight coefficient acquisition unit, in communication with the consistency check module, for acquiring the weight coefficient of the key indicator when the consistency check of the matrix passes;

[0124] The model building unit is in communication with the weight coefficient acquisition unit and is used to normalize the values ​​of the relationship indicators and establish a comprehensive score weighted model for thickener swallowing performance based on the weight coefficients of each key indicator.

[0125] In a third aspect, an embodiment of the present application also provides a readable storage medium.

[0126] The readable storage medium of the present application stores a thickener screening program for people with dysphagia, wherein when the thickener screening program for people with dysphagia is executed by a processor, the steps of the thickener screening method for people with dysphagia as described above are implemented.

[0127] Among them, the method implemented when the thickener screening program for people with dysphagia is executed can refer to the various embodiments of the thickener screening method for people with dysphagia in this application, and will not be repeated here.

[0128] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0129] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course, by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of the present application.

[0130] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for screening thickeners for people with dysphagia, characterized in that: The following steps are involved: Constructing a thickening fluid system with the same IDDSI grade, wherein the thickening agent combination in the thickening fluid system with the same IDDSI grade is selected from one or more of modified starch-based SS1, modified starch and gum-based composite SS2, carboxymethyl cellulose, xanthan gum, and guar gum; Obtaining key performance parameters of each thickener in the thickened fluid system, including surface tension, zero shear viscosity, η50, hardness, cohesion, solids content, density, yield stress, and adhesion; To construct a weighted model of comprehensive scores for thickener swallowing performance; Input the performance parameters of key indicators of each thickener in the thickened fluid system with the same IDDSI grade into the comprehensive score weighted model of thickener swallowing performance to obtain the comprehensive score of swallowing performance of each thickener; Based on the comprehensive swallowing performance scores of the thickeners obtained, the thickener with the best swallowing performance is screened; The method for constructing a comprehensive score weighted model for thickener swallowing performance includes: Establish a judgment matrix; Perform consistency check on the judgment matrix and obtain consistency check results; When the consistency check of the matrix passes, the weight coefficient of the key indicator is obtained; The values ​​of key indicators were normalized, and a comprehensive score weighted model for thickener swallowing performance was established based on the weight coefficient of each key indicator; The establishment of the judgment matrix includes: Obtain a comparison table of element importance descriptions and levels; Using the comparison table of element importance description and importance level, a judgment matrix of performance indicators for thickening fluid system is established; The performing consistency check on the judgment matrix and obtaining the consistency check result includes: Obtain the product of the importance levels of the key indicators in each row of the judgment matrix relative to other key indicators, and obtain the product of the importance levels of the key indicators; Calculate the nth root of the product of the importance levels of the key indicators, where n is the total number of key indicators; Obtain the characteristic vector of the nth root of the product of the importance levels of the key indicators; Performing vector regularization processing on the acquired feature vector to obtain a vector regularization result; According to the obtained vector regularization result, the judgment matrix is ​​checked for consistency to obtain a consistency check calculation value; Obtain the consistency check result of the judgment matrix based on the consistency comparison check value and the consistency check standard value.

2. A thickener screening system for people with dysphagia, characterized in that: include: System building module, used to build thickening fluid systems with the same IDDSI level; Performance parameter acquisition module, used to obtain the performance parameters of key indicators of each thickener in the thickening fluid system A model building module for constructing a comprehensive score weighted model of thickener swallowing performance; a comprehensive score acquisition module, in communication with the performance parameter acquisition module and the model building module, for inputting the performance parameters of the key indicators of each thickener in a thickening fluid system with the same IDDSI grade into a comprehensive score weighted model of thickener swallowing performance to obtain a comprehensive score of the swallowing performance of each thickener; a screening module, in communication with the comprehensive score acquisition module, for screening a thickener with the best swallowing performance based on the acquired comprehensive swallowing performance scores of the thickeners; The model building module includes: A judgment matrix establishing unit, used for establishing a judgment matrix; A consistency check module, which establishes a unit communication connection with the judgment matrix, is used to perform a consistency check on the judgment matrix and obtain a consistency check result; A weight coefficient acquisition unit, in communication with the consistency check module, for acquiring the weight coefficient of the key indicator when the consistency check of the matrix passes; a model building unit, in communication with the weight coefficient acquisition unit, for normalizing the values ​​of the relationship indicators and establishing a comprehensive score weighted model for thickener swallowing performance based on the weight coefficients of the key indicators; The thickener screening system for people with dysphagia implements the steps of the thickener screening method for people with dysphagia as claimed in claim 1.

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