The waveform of the EEG activity recorded on the surface of the skin with an EEG machine"

Human tissue cells are always in spontaneous and constantly real estate with a very weak bio electrical activity. The electrical activity of the brain cells leads to and after amplification electroencephalograph recorded on special paper, namely that certain waveform, amplitude, frequency and phase of the graphics and curves, namely the EEG using electrodes placed on the scalp. When the brain tissue pathological or functional changes, this curve is the corresponding changes, so as to provide evidence for clinical diagnosis and treatment.

The so-called CT scanning, is the electronic computer axial tomography. Its basic principle is to use the head of the "X-ray" absorption rate of different imaging. The density of bone, brain tissue and cerebrospinal fluid of the skull is different, which is not consistent with the absorption of X-ray. According to the difference, to X-ray beam from multiple directions along the head of a selected fault plane were irradiated, determined by the quantity of X-ray, digital, calculated the layer organization each unit volume of absorption coefficient and then reconstruct image of a kind of imaging technology.

The body rotation is feeling dizziness, head heavy feeling dizzy Q. What kind of assistant examination should be done by the Department of neurology or the physician in the Department of ENT. EEG monitor movement electric meter

1, the use of color blue bottom liquid crystal display, according to the Chinese menu prompt operation. The tester directly shows the various items to be tested and the predetermined parameters of the equipment being seized, and no need to remember a large number of test items and parameters. One touch operation, without memory and complex operation key combination. Using shortcut keys, can quickly switch detection project.

2, verification of digital ECG, dynamic ECG machine and simulated ECG, EEG machine, digital brain topographic map, ECG monitor. In full compliance with the latest national rules <JJG1041-2008 digital ECG >, <JJG1042-2008 dynamic (mobile) > of ECG machine, <JJG543-2008 electrocardiograph (ECG) >, <JJG1043-2008 electroencephalograph >, <JJG760-2003 ECG >, <JJG749-2007> and <YY1139-2000> technology requirements.

*3, sine wave and square wave pulse superposition signal: double signal source (used to test the dynamic ECG machine)

By the embedded dual source stack.

A) Fang Bo pulse signal component:

Repeated times: 100 times /min, the maximum allowable error: + 1%; pulse width: 0.1ms, 1ms, 10ms, the maximum allowable error: + 1%

Pulse rising edge: <100us; amplitude: 2mV, 20mV and 200mV, the maximum allowable error: + 1%

B) sine wave signal components: the same seventh.

*4, ECG simulation signal (for digital ECG test)

(a) amplitude (peak to peak) range: 8 V to 30.00V

The maximum allowable error: 100 V ~ 30.00V ~ + 1%; 30 mu V ~ 100 V + 9.5%; 1.000V + 0.9%

Cycle (b) cycle: 1333.3ms (or frequency 0.75Hz); maximum allowable error: + 0.5%

C) ECG signal in A1, A2... A10 maximum allowable error of + 1%

D) ECG signal in T1, T2... T11 maximum allowable error of + 1%

*5, standard heart rate signal 1 (ECG simulation) (used for digital ECG test)

Can produce 6 kinds of ECG rhythm test signal range: 30 ~ 300 / min.;

The maximum allowable error of the cardiac rhythm test signal: + 0.5%

The range of amplitude and the maximum allowable error of the same 4a.