CN103330982B - A kind of test lung with self-learning function - Google Patents

Abstract

The invention belongs to technical field of medical instruments, achieve a kind of artificial intelligence lung with self-learning function.Summary of the invention relates generally to the respiratory characteristic by detecting patient's mechanical ventilation, sets up the mathematical model of patient respiration, carrys out the method for modal patient's lung.The test lung that the present invention proposes is different from traditional test lung, this test lung is connected in parallel in the breathing circuit of patient together with respirator, by its self-learning function, understands the mechanical ventilation dynamic characteristic of patient, set up the mathematical model of patient respiration, thus the process of accurate analog patient respiration.This test lung by self-learning function, obtains the respiratory characteristic of patient, can the respiratory of accurate analog patient, and the respiratory system state of an illness for off-line research patient has great importance, and has good promotion prospect.

Description

A kind of test lung with self-learning function

Technical field

The invention belongs to technical field of medical instruments, relate to a kind of test lung with self-learning function.

Background technology

Test lung be use respirator must spares, be used for detecting respirator function and regulating parameter.Test lung common at present, mainly through regulating respiration parameter, sets the breathing dynamic characteristic of test lung.Respiratory characteristic for specific condition or given patient but cannot set by regulating respiration parameter.

For this situation, the test lung with self-learning function that the present invention proposes is by self study patient respiration characteristic, and set up the mathematical model of patient respiration, accurate analog patient respiration dynamic characteristic, has good promotion prospect.

Summary of the invention

The object of the invention is: a kind of test lung with self-learning function is provided.

Technical scheme of the present invention is: the test lung with self-learning function comprises button assembly (1), controller (2), display screen (3), malleation source of the gas (4), gas tank (5), negative pressure source of the gas (6), pressure transducer i(7), choke valve (8), pressure transducer ii(9), flow transducer (10) and pressure transducer iii(11).(see Fig. 1).Test lung utilizes and is arranged on the pressure transducer i(7 that specific choke valve (8) measures), pressure transducer ii(9) detect the mechanics of breathing characteristic of patient's mechanical ventilation, set up the mathematical model of patient respiration, according to set up mathematical model, and with flow transducer (10) and pressure transducer iii(11) detection limit for feedback signal, the pressure of the defeated in/out of controller (2) control malleation source of the gas (4), negative pressure source of the gas (6) and flow, thus the respiratory characteristic ensureing test lung accurate analog patient.

Advantage of the present invention is: compared with traditional test lung, invention increases self-learning function, can accurate analog patient respiration dynamic characteristic, and does not need to input any parameter, easy to use, has good promotion prospect.

Accompanying drawing explanation

Fig. 1 is the structure diagram of test lung of the present invention.

1---button assembly; 2---controller; 3---display screen; 4---malleation source of the gas;

5---gas tank; 6---negative pressure source of the gas; 7---pressure transducer i; 8---choke valve;

9---pressure transducer ii; 10---flow transducer; 11---pressure transducer iii;

12---respirator; 13---lung;

Detailed description of the invention

The present invention is further illustrated below.

The dynamic characteristic of patient's mechanical ventilation that controller detects according to sensor, the respiratory characteristic of accurate understanding patient, based on the control system feature of positive/negative-pressure source of the gas, adopt feedforward, feedback control algorithm, the accurate control of test lung output pressure and flow can be realized, thus realize the breathing dynamic characteristic of modal patient.

The measurement of patient respiration flow is adopted to the measuring principle of differential pressure flowmeter: namely, the principle that the mechanical energy based on fluid is changed mutually.The fluid flowed in horizontal pipe, have dynamic pressure energy and static energy (potential energy is equal), under certain condition, the energy of these two kinds of forms can be changed mutually, but energy summation is constant.The universal calculation equation of differential pressure flowmeter is as follows, and being derived by formula 1 to obtain formula 2.In formula, Q represents flow, and △ P represents differential pressure, and ρ represents fluid density, and K is instrument coefficient, obtains by testing to demarcate.

$Q=K\sqrt{\frac{\mathrm{\ΔP}}{\mathrm{\ρ}}}$ (1)

$\mathrm{\ΔP}=\frac{Q^2\mathrm{\ρ}}{K^2}$ (2)

The linear model of respiratory system is:

$\mathrm{\ΔP}=R_{\mathrm{rs}}Q+\frac{V}{C_{\mathrm{rs}}}+\mathrm{PEEP}$ (3)

$C_{\mathrm{rs}}=\frac{\mathrm{\ΔV}}{\mathrm{\ΔP}}$

R _rs=k ₁+k ₂V

Wherein, △ P is to respiratory system applied pressure, can measure and obtain; Q is the flow of breathe air, can measure and obtain; V is the volume sucking pulmonary air, obtains by calculated flow rate integration; R _rsfor the total vapour lock of respiratory system, pass through k ₁, k ₂and V calculates, wherein k ₁with k ₂obtain by multi-group data matching; C _rsfor total compliance of respiratory system, by calculating; PEEP is end-tidal pressure, can measure and obtain.

Claims (1)

1. there is a test lung for self-learning function, it is characterized in that: be made up of button assembly (1), controller (2), display screen (3), malleation source of the gas (4), gas tank (5), negative pressure source of the gas (6), pressure transducer i (7), choke valve (8), pressure transducer ii (9), flow transducer (10), pressure transducer iii (11); The controller of test lung detects patient's exhalation by pressure transducer i (7), choke valve (8) and pressure transducer ii (9) and sucks the pressure versus flow of air, set up the mathematical model of patient respiration process, and with the detection limit of flow transducer (10) and pressure transducer iii (11) for feedback signal, with the pressure versus flow of the delivery air of accurate control simulation lung, determine the duty of malleation source of the gas (4) and negative pressure source of the gas (6), realize the respiratory of modal patient; This test lung is breathed out according to patient and is sucked the pressure versus flow of air, set up the mathematical model of patient respiration process, automatically the duty of its malleation source of the gas (4) and negative pressure source of the gas (6) is controlled, realize the accurate control of test lung delivery air pressure versus flow, the respiratory of modal patient.