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A signal filtering method for a thromboelastography instrument

A thromboelastography and signal filtering technology, applied in the field of signal processing, can solve the problems of single, the filtering effect is not obvious, and the filter cannot eliminate noise signals, etc., to eliminate noise, eliminate long-period large pulse interference, and eliminate sampling The effect of the interference of the noise signal

Active Publication Date: 2019-04-26
深圳沃德生命科技有限公司
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Problems solved by technology

[0004] However, the above method has the following problems: (1) The Teg data analysis software performs a single and simple filter on the passing dynamic signal, and mechanical vibration is often introduced in the instrument operation engineering, and the noise signal generated by mechanical vibration has a changing frequency. The noise signal cannot be eliminated at all; (2) The data screening algorithm can only eliminate the interference of small vibration signals to a certain extent, and in the initial stage of blood coagulation, the screening effect on the rapidly changing signal of blood coagulation is not very obvious

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  • A signal filtering method for a thromboelastography instrument
  • A signal filtering method for a thromboelastography instrument
  • A signal filtering method for a thromboelastography instrument

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[0031] In order to describe the technical solutions of the present invention more clearly and completely, the present invention is further described below with reference to the accompanying drawings.

[0032] Please refer to figure 1 , a signal filtering method for thromboelastography of the present invention, comprising the following steps:

[0033] (1) Using kinetic signal sampling to obtain kinetic digital signal S1;

[0034] (2) performing mean filtering on the kinetic digital signal S1 to obtain the digital signal S2;

[0035] (3) Limiting and filtering the digital signal S2, and outputting the digital signal S3;

[0036] (4) median filtering is performed on the digital signal S3 to obtain the digital signal S4;

[0037] (5) low-pass filtering is performed on the digital signal S4 to obtain the digital signal S5;

[0038] (6) carry out identification processing to the digital signal S5, and calculate a plurality of stable maximum value points and a plurality of stable...

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Abstract

The invention provides a signal filtering method for a thromboelastography instrument. The invention discloses a signal filtering method for a thromboelastography instrument. interference of samplingnoise signals can be eliminated; The method has the advantages that in the whole blood coagulation fibrinolysis period, sharp pulse interference in slow change signals and large-amplitude short-time non-periodic signal interference are achieved, signal oscillation caused by high-frequency vibration of a signal acquisition probe can be shielded, long-period large pulse interference is eliminated, the purpose of data screening is achieved, noise can be well eliminated in the whole blood coagulation fibrinolysis period, and output detection data are more accurate.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a signal filtering method for thromboelastometry. Background technique [0002] Thromboelastometry is a dynamic sensor detection technology that collects the dynamic change signals of blood in the process of coagulation to fibrinolysis, and calculates the parameter results through data processing. Analytical, coagulation profile assessments are commonly used in clinical evaluations such as postoperative bleeding, thrombosis during or after extracardiac surgery, organ transplantation, trauma, and thrombosis that occur during or after cardiac surgery. [0003] At present, TEG elastography of American Blood Company can monitor the coagulation status of patients, mainly based on the following two facts: (1) the final result of the blood coagulation process is the formation of blood clots; (2) the physical properties of blood clots (speed, hardness, etc.) , stability) will determine ...

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Application Information

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IPC IPC(8): G06K9/00G16H40/00
CPCG16H40/00G06F2218/02
Inventor 廖家亮金莹
Owner 深圳沃德生命科技有限公司
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