CN115590547B

CN115590547B - Method and device for locating borborygmus

Info

Publication number: CN115590547B
Application number: CN202211224174.7A
Authority: CN
Inventors: 王国静; 王卫东; 刘洪运
Original assignee: Chinese PLA General Hospital
Current assignee: Chinese PLA General Hospital
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2024-06-18
Anticipated expiration: 2042-10-08
Also published as: CN115590547A

Abstract

The application provides a borborygmus sound positioning method and a borygmus sound positioning device, wherein a multichannel borygmus sound acquisition device is used for acquiring borygmus sound signals of a plurality of positions of the abdomen of a subject, a time sequence similarity method is combined, homologous borygmus sound signals are identified, borygmus sounds generated by the same sound source in different channels are searched, and the borygmus sound sounding positions are positioned according to the time delay of the borygmus sound arrival. The positioned borborygmus sound provides help for more accurately evaluating the intestinal activity states at different positions so as to realize the evaluation of the intestinal overall intestinal state and the diagnosis of intestinal diseases, and has important clinical and research significance.

Description

Method and device for locating borborygmus

Technical Field

The present application relates to positioning of borborygmus, and more particularly to a method and apparatus for positioning borborygmus.

Background

The borborygmus is an important physiological signal, can reflect the motion state of human intestinal tracts, and is an important index for clinically diagnosing intestinal diseases. At present, the traditional stethoscope is still used for detecting the borborygmus in clinic, and then the situation of the intestinal tract is judged through the clinical experience of doctors, so that the subjectivity is strong, the accuracy is low, and the scientificity is poor. At present, research on borborygmus is that digital borygmus equipment is developed on one hand, and borygmus signal analysis and clinical application are performed on the other hand. Digitized borborygmus equipment research and development mainly focuses on acquisition of borygmus signals with high signal-to-noise ratio, with single channel and multiple channels. The analysis and clinical application research of the borborygmus signal is relatively wide, and mainly comprises the feature extraction and accurate identification of the borborygmus signal and the indication and evaluation of clinical diseases. There has been no study on localization of borborygmus.

The positioning research of borborygmus has very important clinical significance, because the conventional gastroscope is explored to the duodenal papilla, the enteroscope is explored to the ileocecal valve, the complete small intestine cannot be reached, and the capsule endoscope and the enteroscope suitable for small intestine examination have higher price, and the enteroscope is accurate but time-consuming and labor-consuming; because of the lack of economical and convenient examination means, small intestine diseases, especially empty and ileum diseases, are difficult to diagnose, often called diagnosis and treatment "blind areas", and the main generation positions of borborygmus are concentrated on small intestine sections, and small intestine sections also have borygmus.

Disclosure of Invention

In view of the above, the present application aims to provide a method and apparatus for locating a borborygmus, which can locate a position where a borygmus occurs.

The method for locating borborygmus of the present application comprises:

Acquiring borborygmus signals of a plurality of positions of the abdomen of the subject corresponding to the small intestine by adopting a multichannel borygmus acquisition device; each position is a borborygmus sound receiving point;

identifying the borborygmus signals of the same sound source by combining a time sequence similarity method;

For the same sound source, the time difference between different bowel sound receiving points is combined to locate the sound source.

Preferably, for the same sound source, other borborygmus receiving points are obtained as correction points by taking a borygmus receiving point which receives a borygmus signal of the sound source first as a reference point;

For each correction point, obtaining a time difference between the bowel sound receiving time of the correction point and the bowel sound receiving time of the reference point; taking the correction point as a center, taking the product of the time difference corresponding to the correction point and the transmission speed of the borborygmus sound as a radius, and defining the correction range of the correction point;

An overlapping region of the correction ranges of the correction points is obtained, and the sound source is located at the small intestine position corresponding to the overlapping region.

Preferably, the plurality of locations are distributed along the extension direction of the small intestine of the patient centered on the navel of the subject.

Preferably, the plurality of positions is 5 positions.

The application relates to a borborygmus sound positioning device, which comprises a processing unit;

the processing unit acquires the borborygmus signals of a plurality of positions of the abdomen of the subject corresponding to the small intestine, which are acquired by the multichannel borborygmus acquisition device;

the processing unit utilizes a time sequence similarity method to identify homologous borborygmus signals;

for the same sound source, the processing unit calculates the time difference between different bowel sound receiving points to locate the sound source.

The borborygmus sound positioning method and the borygmus sound positioning device can reflect borygmus sound conditions of specific positions, correlate clinical symptoms, evaluate intestinal conditions of the positions and provide a new thought for diagnosis of small intestinal diseases.

Drawings

FIG. 1 is a schematic diagram showing an implementation of the borborygmus localization method of the present application;

Detailed Description

The method and apparatus for locating borborygmus of the present application will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic diagram showing an implementation of the method for locating a borborygmus.

Since the borborygmus generating position is mainly concentrated in the small intestine, a small part of the borygmus generating position is in the colon, and the borygmus collecting points mainly surround the navel, as shown in fig. 1, 5 borygmus collecting points are arranged, and the sampling rate is set to be 8KHz. If the sounding site of the borborygmus is the S point, borygmus sounds collected at 5 sites are shown in the right part of fig. 1.

The application is not limited to 5 positions, but may be more, but preferably not less than 3 positions.

The method for judging whether the bowel sounds are the same sound source is mainly realized through a similarity measurement method for time series data, and specifically comprises a similarity measurement method for Euclidean distance or similar Euclidean distance, a dynamic time warping distance, an improvement method and the like, so as to judge whether the bowel sounds of 5 channels in the figure are homologous.

And judging the distance between the borborygmus acquisition point and the sounding point, and positioning the borborygmus. The step is mainly realized through delay time, as shown in fig. 1, signals from 1 channel to 5 channels are determined to be homologous, the 1 channel receives the borborygmus from the sound source at the earliest, and the sound source is definitely near the 1 channel, so that the receiving points of the 1 channel are taken as reference points, and the receiving points of the other channels are taken as correction points; the delta t1, delta t2, delta t3 and delta t4 are respectively delay time of the borborygmus received by the corresponding receiving points of the 2 channels, the 3 channels, the 4 channels and the 5 channels relative to the borygmus received by the reference point, and then the position of the sounding source is corrected through the other 4 channels. As shown in the figure, the blue circle represents the sound source position receivable by 2 channels, with a radius r1=v×Δt1; the green circle represents the sound source position that 3 channels can receive, its radius r2=v×Δt2; the yellow circle represents the sound source position that can be received by the 4 channels, and the radius is r3=v×Δt3; the black circle represents the sound source position that can be received by the 5 channels with a radius r4=v×Δt4. Where v is the propagation velocity of borborygmus. Finally, the correction position of the sound source is determined by the overlapping positions of the four circles.

When the method of the present application is implemented by the processing unit, the borborygmus positioning device of the present application is constituted. The processing unit may be a CPU, a single chip microcomputer, etc. The processing unit may also be a processing unit of a multi-channel borborygmus acquisition device.

Unless defined otherwise, all technical and/or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application relates. The materials, methods, and examples mentioned herein are illustrative only and not intended to be limiting.

Although the present application has been described in connection with specific embodiments thereof, those skilled in the art will appreciate that various substitutions, modifications and changes may be made without departing from the spirit of the application.

Claims

1. A method of locating borborygmus, comprising:

for the same sound source, combining the time difference between different bowel sound receiving points to locate the position of the sound source;

for the same sound source, taking the bowel sound receiving point which firstly receives the bowel sound signal of the sound source as a reference point, and solving other bowel sound receiving points as correction points;

2. The method according to claim 1, characterized in that:

The plurality of positions are distributed along the extension direction of the small intestine of the patient with the navel of the subject as a center.

3. The method according to claim 1, characterized in that:

The plurality of positions is 5 positions.

4. An borborygmus sound positioning device, comprising a processing unit;

for the same sound source, the processing unit calculates the time difference between different bowel sound receiving points to locate the position of the sound source;