Hemodialysis Treatment Evaluation for Variable Dialysis Schedules
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Solution Overview
Problem
Existing kinetic models for hemodialysis treatment suffer from reduced accuracy due to measurement errors and do not account for varying treatment times and dialysis days, leading to inaccurate HDP and sf-Kt/V calculations.
Innovation Solution
A hemodialysis treatment assistance system that calculates peak concentrations of designated substances using a kinetic model, incorporating dialyzer clearance, treatment times, and body fluid volume to evaluate HDP and sf-Kt/V, correcting these values for non-uniform treatment schedules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If kinetic model is used to calculate treatment parameters, then treatment prescription can be generated, but measurement errors reduce calculation accuracy
Solution Approach 1:
The patent introduces HDP and sf-Kt/V as intermediary evaluation indicators that bridge the kinetic model calculations and treatment evaluation. These indicators serve as mediators to assess treatment outcomes while accounting for measurement uncertainties, allowing the system to generate treatment prescriptions without being overly sensitive to measurement errors in individual blood samples.
2Ease of operation
If HDP is used to evaluate dialysis adequacy, then evaluation is simplified, but body weight and removal performance are not considered
Solution Approach 1:
The patent merges multiple evaluation dimensions by introducing sf-Kt/V that combines body weight considerations with dialysis removal efficiency (clearance). This merged indicator complements HDP by incorporating both patient-specific anatomical factors and treatment-specific performance factors, thereby improving evaluation accuracy while maintaining operational simplicity through standardized calculation protocols.
3Measurement precision
If sf-Kt/V is used to consider body weight and removal efficiency, then evaluation precision improves, but it cannot be applied when treatment time or dialysis day varies
Solution Approach 1:
The patent applies dynamics by making the evaluation system adaptable to variable treatment schedules. The sf-Kt/V calculation is designed to dynamically adjust to different treatment times and dialysis frequencies. The system can recalculate sf-Kt/V based on actual treatment parameters (time, frequency, clearance) for each patient session, enabling accurate evaluation even when schedules vary week to week or session to session.
4Adaptability or versatility
If treatment schedule varies for each patient, then individualized treatment is achieved, but existing evaluation indicators become inapplicable
Solution Approach 1:
The patent employs parameter changes by allowing the evaluation indicators (HDP and sf-Kt/V) to be recalculated with updated parameters for each individualized treatment schedule. When treatment time, frequency, or clearance parameters change for a specific patient, the system recalculates these indicators using the new parameters, thereby maintaining evaluation precision across diverse individualized treatment regimens.
Data Source
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AI summary
A system capable of improving an evaluation accuracy of an outcome of hemodialysis treatment is provided. A peak value of a concentration of a designated substance is obtained according to a kinetic model based on treatment information including a clearance of a dialyzer used for hemodialysis treatment of a patient in a designated period, a time of the hemodialysis treatment for each session and the number of times of the hemodialysis treatment, and a body fluid volume of the patient. An outcome of the hemodialysis treatment for the patient in the designated period is evaluated based on an HDP or an sf-Kt/V corresponding to the peak value.