ABSTRACT
Fetal heart rate (FHR) baseline estimation is of significance for the computerized analysis of fetal heart rate and the assessment of fetal state. In our work, a fetal heart rate baseline correction algorithm was presented to make the existing baseline more accurate and fit to the tracings. Firstly, the deviation of the existing FHR baseline was found and corrected. And then a new baseline was obtained finally after treatment with some smoothing methods. To assess the performance of FHR baseline correction algorithm, a new FHR baseline estimation algorithm that combined baseline estimation algorithm and the baseline correction algorithm was compared with two existing FHR baseline estimation algorithms. The results showed that the new FHR baseline estimation algorithm did well in both accuracy and efficiency. And the results also proved the effectiveness of the FHR baseline correction algorithm.
Subject(s)
Female , Humans , Pregnancy , Algorithms , Heart Rate, Fetal , Reference ValuesABSTRACT
Objective To investigate the application value of breathing machine noninvasive positive pressure ventilation in acute myocardial infarction patients with left ventricular failure.Methods 70 acute myocardial infarction patients with left ventricular failure were randomly divided into observation group and control group,the control group received conventional treatment,on the basis of the control group,patients in the observation group were treated with noninvasive positive pressure ventilation.The treatment indicators and the proportion of converted to endotracheal intubation,mortality and length of hospital stay were compared between the two groups.Results Compared with the control group,the PaCO2,RR,HR and SBP of observation group reduced more significantly,PaO2 and SaO2 increased more significantly(t =4.2588,5.144,7.127,4.2814,6.4719,6.2629,all P ＜ 0.05).Compared with the control group,the SV and EF of observation group increased more significantly,CVP decreased more significantly (t =12.0527,14.0937,14.6425,all P ＜0.05).The patients converted to endotracheal intubation and mortality ratio were significantly lower than the control group,the average length of stay was significantly shorter than the control group(x2 =4.6289,4.2000,t =6.3892,all P ＜ 0.05).Conclusion In the treatment of acute myocardial infarction patients with left ventricular failure,noninvasive positive pressure ventilation can significantly improve cardiac function,lung ventilation and ventilatory function,increase the therapeutic effect.
ABSTRACT
Objective: Cervical smear screening for abnormal cells plays an important role in reducing the mortality of cervical cancer. However, all smears must be approved by the naked eyes using microscopes, and there has been a higher false-positive rate and false-negative rate. Methods: To solve this problem, the thin-layer cytology assistant screening system was developed. On the hardware side, the traditional computer-aided analysis system was improved; and on the software side, gray level transformation, edge detection, image mosaic, and some other image processing methods were introduced; and by the use of neural network, the system could realize the function of acquisition, mosaic, process, measure and recognition of the liquid-based cytology image. Results: This system was brought into the test of 150 thin-layer cytology technology(TCT) cervical cell samples, and the agreement between the results of computer-aided analysis and the manual analysis by pathology experts exceeded 90%. Conclusion: Both the traditional Pap smear and TCT preparation smear can be diagnosed by this system. As a result, the false-positive rate and false-negative rate of the cervical smear screening will be significantly reduced, meanwhile, work efficiency of pathologist can be greatly improved.
ABSTRACT
In order to improve synchrony between a ventilator and its patient, a new method for triggering a ventilator based on diaphragmatic electromyogram (EMG) is introduced. The methods to extract and process diaphragmatic EMG signals are studied. It has been shown that the characteristic parameters of a respiration activity, such as inspiratory beginning point, expiratory beginning point and respiration period, can be detected from diaphragmatic EMG envelop instead of traditional flux curve. A new parameter, designated as diaphragmatic "Intensity of EMG" for short "IEMG", is defined. Repeat respiration tests have disclosed that there is relatively high correlation between the diaphragmatic IEMG curve and its corresponding cubage curve. These results primarily demonstrate that the new synchronization method may be feasible.
Subject(s)
Humans , Diaphragm , Physiology , Electromyography , Positive-Pressure Respiration , Methods , Respiration , Respiration, Artificial , Methods , Respiratory Insufficiency , Therapeutics , Respiratory Muscles , Physiology , Work of Breathing , PhysiologyABSTRACT
The ambulatory EEG recorder designed in this paper can continuously record 24-hour EEG signals on 18 channels. C8051F020, a kind of mixed-signal ISP FLASH MCU, controls all the functions such as sampling, storage and many others. The 12-bit ADC in C8051F020 samples the EEG signal amplified by the preamplifier. At the same time, the EEG signal of every channel can be selected through the keyboard to be displayed on LCD so that the working status can be detected. After the system is ready, the signals sampled during 24 hours are stored into the CompactFlash card as FAT16 files.
ABSTRACT
In recent years, 40Hz auditory steady state response (ASSR) has been paid more attention when the depth of anaesthesia monitored because its same source with the middle latency auditory evoked potential (MLAEP), strong anti-jamming ability and close relationship with consciousness level. This article brings forward some effective and steady methods for extracting ASSR according to its characteristics. The results of these methods are analyzed and compared based on the actual records from clinical practice. And thus an extraction method fit for monitoring the depth of anaesthesia is determined.
ABSTRACT
A computerized fetal ECG(FECG)system is presented,w hi ch is composed of two components.One is the data collection device with a PIC m icrocomputer as the main hardware,which has low power consumption and gets power supply through serial port.The other is a software platform based on PC,which i s built through LabView6.1,a graphic programming language.Plenty of modules prov ided by LabView6.1utilized,it is efficient to develop the software platform.In particular,the implementation of the matched filtering algorithms is introduced ,which is the core of the software platform.A new method of updating templates o f matched filter is described.
ABSTRACT
LEEP electro-scalpel is a type of cervical disease device. It belongs to the high frequency electro-knife in medical apparatus category. There is no domestic LEEP electro-scalpel at present. It is significant and important for the study group to resolve the safety and EMC problem and develop domestic LEEP electro-scalpel which is safe, stable and competitive in price while has the same surgery effect as the imported one.