scholarly journals Detection of Left Arm and Left Leg Lead-wire Interchange Based on Serial ECGs

2020 ◽  
Author(s):  
Richard Gregg ◽  
Saeed Babaeizadeh
Keyword(s):  
Lead Wire

Numerical Simulation & Experimental Investigation of SMT Laser Microsoldering Thermal Process

1991 ◽  
Vol 226 ◽  
Author(s):  
Wang Chunqing ◽  
Qian Yiyu ◽  
Jiang Yihong
Keyword(s):  
Thermal Conductivity ◽  
Numerical Simulation ◽  
Experimental Investigation ◽  
Thermal Process ◽  
Light Wave ◽  
Light Reflection ◽  
Lead Wire ◽  
Wire Surface ◽  
Conductivity Variation ◽  
Thermal Conductivity Variation

AbstractIn this paper,a numerical simulation of thermal process in the SMT laser microsoldering joint has been developed, in which, the influence on thermal process of the factors such as the thermal conductivity variation of solder with temperature, light reflection coefficient of the lead wire surface, and heat exchange on the surface of SMT materials all have been considered. In order to carry this numerical calculation practice and prove it's results,the reflexive characteristic of light wave to the SMT materials has been gauged,and the dynamic temperature process of laser microjoint has been measured by a new experimental method which was invented by the authors.The results of numerical simulation have been borne out by the tests, and the influences of heating parameters on thermal process has been analysed in this paper.The conclusions will be advantageous to the further study of the microjoint quality control in the SMT laser microsoldering.

Revision of Vagal Nerve Stimulator Electrodes Through a Posterior Cervical Triangle Approach: Technical Note

2010 ◽  
Vol 67 (suppl_2) ◽  
pp. ons457-ons460
Author(s):  
Brent R. O'Neill ◽  
James E. Wilberger
Keyword(s):  
Skin Incision ◽  
Electrode Site ◽  
Technical Note ◽  
Vagal Nerve ◽  
Electrode Placement ◽  
Lead Wire ◽  
Posterior Border ◽  
Nerve Stimulator ◽  
Vagal Nerve Stimulator ◽  
Back Ground

ABSTRACT BACK GROUND: We describe an approach to vagal nerve stimulator (VNS) lead replacement through the posterior cervical triangle. Scar around the structures of the carotid sheath is avoided and new leads are placed on a pristine section of the vagus nerve proximal to the original site. CLINICAL PRESENTATION: Skin incision from the implantation surgery is incorporated and extended to allow access to the posterior border of the sternocleidomastoid muscle (SCM). Dissection proceeds along the posterior border of the SCM. The SCM and jugular vein are retracted anterior to expose a fresh segment of the vagal nerve immediately superficial to the carotid artery and proximal to the original electrode site. Once the nerve is adequately exposed, electrode placement proceeds in the standard fashion. Dysfunctional electrodes are left in place, and the lead wire is cut as near the electrodes as can be easily accessed. Three patients have undergone lead revision with this approach. Lead placement was successful and free from complications in all cases. CONCLUSION: The posterior cervical triangle approach provides a virgin dissection plane for VNS revision.

scholarly journals The Optimum Design for Minimizing von Mises Stress of Lead Wire

2017 ◽  
Vol 16 (4) ◽  
pp. 119-126 ◽  
Author(s):  
Chang Hyeong Park ◽  
◽  
Seong-Jin Cho ◽  
Seimg Chul Han ◽  
Jin Ho Kim
Keyword(s):  
Optimum Design ◽  
Von Mises Stress ◽  
Lead Wire ◽  
Von Mises

Temperature Cycle Measurement System Based on Single Chip Computer

2010 ◽  
Vol 428-429 ◽  
pp. 487-492
Author(s):  
Xi Yin ◽  
Xiao Jun Wang ◽  
Yong Que Xie
Keyword(s):  
High Precision ◽  
Measurement System ◽  
Low Cost ◽  
Temperature Cycle ◽  
Engineering Practice ◽  
Lead Wire ◽  
Single Chip ◽  
Piecewise Linearization ◽  
Single Chip Computer ◽  
Precision Temperature

This thesis introduces a low cost and high precision temperature cycle measurement system with adoption of PT100 as temperature sensor, with single chip computer as the core. The method of sub-three-wire connection is proposed for engineering practice, then, can eliminate the effects of lead wire resistance and simplify the external cable connection. We discuss and research circuit component selection, circuit design, improving system reliability, and a software method of piecewise linearization process is adopted, thus we ensure exact and reliable measure and the system characteristic of low cost and high precision.

Abstract 125: Automated External Defibrillator Shock Advisement Performance Among Multiple Human Electrocardiographic Rhythms and Devices

Circulation ◽  
2019 ◽  
Vol 140 (Suppl_2) ◽  
Author(s):  
Xavier J Szigethy ◽  
Connor J Willson ◽  
David D Salcido ◽  
Dylan A Defilippi ◽  
James J Menegazzi
Keyword(s):  
Sensitivity And Specificity ◽  
Real World ◽  
Peak Frequency ◽  
Lead Wire ◽  
Digital To Analog Converter ◽  
Automated External Defibrillators ◽  
Signal Characteristics ◽  
Rhythm Analysis ◽  
High Degree ◽  
Median Slope

Background: Automated external defibrillators (AEDs) perform rhythm analysis in order to facilitate defibrillation. The effectiveness of AEDs is dependent on the accuracy of their rhythm classification, which includes differentiation of shockable rhythms from non-shockable rhythms Independent (i.e. non-industry) evaluation of the performance of AEDs against real-world ECG could lead to improvements in their performance. Objective: To evaluate the sensitivity and specificity characteristics of commercial AEDs with respect to quantitative properties of the ECG waveform in several rhythm presentations using real world ECG data. Methods: We conducted a prospective simulation study evaluating three commercially available AEDs from Defibtech, Phillips, and Zoll on the determination of ECG rhythm shockability. Performance was evaluated for 181 human ECG recordings (101 ventricular fibrillation-VF, 55 PEA, and 25 asystole) ranging widely in signal characteristics, obtained from the Pittsburgh site of the Resuscitation Outcomes Consortium. We used a commercially available digital-to-analog converter (National Instruments USB-6001) to inject the recordings into each AED through a direct lead-wire interface, recording shock advisement decisions in a best-out-of-three approach for each device/rhythm pairing. We calculated the sensitivity and specificity for discriminating VF and non-VF rhythms for each device and overall. VF signal characteristics were calculated, including peak frequency, median amplitude, and peak amplitude, and the VF quantitative waveform measures AMSA and median slope. Results: The 101 VF trials featured signals with mean peak frequency 10.02 Hz(IQR 4.80 Hz), mean AMSA 9.13(IQR 7.29), mean median slope 6.72 (IQR 3.66). The sensitivities were: Defibtech 99.0%; Philips 97.0%; Zoll 98.0%. The specificities were: Defibtech 98.7%; Philips 96.2%; Zoll 97.4%. Defibtech recorded 5 discordant advisements and Philips and Zoll recorded eight each. The overall sensitivity was 98.0%, and the specificity 97.4%. Conclusion: Evaluated against a wide variety of real-world signal presentations, commercial AEDs demonstrated a high degree of sensitivity and specificity for shockable ECG rhythms.

scholarly journals Reduction method of residual voltage by connecting lead length of surge protection device

2018 ◽  
Vol 7 (3.3) ◽  
pp. 384
Author(s):  
Young Dal Kim ◽  
Young Chan Kim ◽  
Yun Mi Jeong ◽  
Dae Dong Lee
Keyword(s):  
Reduction Method ◽  
The Other ◽  
Installation Space ◽  
Lead Wire ◽  
Protection Device ◽  
Design Technique ◽  
Wire Length ◽  
Residual Voltage ◽  
Protection Level ◽  
Surge Protection

Background/Objectives: In order to minimize the damage and malfunction of the equipment and system from various surges, we studied the method of reducing the residual voltage according to the lead wire length of the surge protector.Methods/Statistical analysis: In buildings, SPD installation space is insufficient or narrow, resulting in longer lead wire of SPD, and SPD protection performance is decreased due to increase of voltage protection level and residual voltage. In this study, the voltage protection level and the residual voltage of the conventional SPD model and the proposed SPD model are analyzed according to the change of the connecting conductor length from 0.5to 100m.Findings: In the case of the conventional SPD model, the protection level of the SPD is excellent by measuring the voltage protection level at 1,410V even if the lead wire length of the connecting conductor is changed to 10m, but when it exceeds 10m, the protection performance and the protection cooperation are reduced. On the other hand, in the case of the proposed SPD model, the voltage protection level was measured to be 50 V or less even if the lead wire length of the connecting conductor was changed to100 m. Therefore, it is considered that SPD protection performance and protection cooperation are excellent.Improvements/Applications: The design technique of SPD obtained through this study will help to select the optimal installation site and reduce the budget.  

scholarly journals Confirmation of Nuclear Heating Rate for Installation of Cold Neutron Source at HANARO

2020 ◽  
Vol 225 ◽  
pp. 04004
Author(s):  
Kim Myong-Seop ◽  
Park Byung-Gun
Keyword(s):  
Heating Rate ◽  
Neutron Source ◽  
Cold Neutron ◽  
Reactor Core ◽  
Reactor Power ◽  
Electric Heater ◽  
Lead Wire ◽  
Heating Rates ◽  
Cold Neutron Source ◽  
Nuclear Heating

In order to determine the capacity of the cold neutron source refrigerator of HANARO, the nuclear heating rate at CN vertical hole is measured by using the heat-flow calorimetric method and confirmed by the calculation. The heating rate measurement device of HANARO was composed of a calorimeter sensor, an air containing aluminum sleeve for fitting the sensor to the CN hole, aluminum weight and a lead wire assembly. The calorimeter sensor consists of a cylindrical Al sample and container, two thermocouples and the electric heater for the calibration of the calorimeter. The sample is separated by an air gap from the Al container surrounded by an air containing Al sleeve. After installation of the calorimeter at a measurement position of HANARO, the heat transfer inside the calorimeter was simulated by the electric heating for the sample. The nuclear heating rates at the CN hole were determined at three reactor powers of 1, 4 and 8 MW by using the calibration curve and the temperature measurements at each reactor power. The measured nuclear heating rate per unit mass of Al sample at 8 MW reactor power is 0.143 W/g and it is equivalent to the 0.494 W/g at 30 MW. The nuclear heating rate was calculated by using the MCNP code. The calculation model for the whole facility including the reactor core and the reflector tank were established. In the calculation procedure, the heat generations by various radiations were evaluated with considering the prompt, delayed and activation effects. The measured heating rate was reasonably well supported by the calculation using the cold neutron facility design code. It will be very useful for the moderator cell of cold neutron source of HANARO.

A SIMPLE METHOD FOR THE CONNECTION OF LEAD WIRE TO CORTICAL ELECTRODES

1969 ◽  
Vol 6 (3) ◽  
pp. 378-382
Author(s):  
Koji Mizoguchi ◽  
C. L. Mitchell
Keyword(s):  
Lead Wire ◽  
Simple Method

Key Protective Techniques Study for Strain Gauges in the Oil-Water Mixture and Pressurization Environment

2013 ◽  
Vol 401-403 ◽  
pp. 912-915 ◽  
Author(s):  
Jia Zuo ◽  
Jian Feng Zhang ◽  
Shen Ke Teng
Keyword(s):  
Survival Rate ◽  
Protective Coating ◽  
Fuel Tank ◽  
Strain Gauges ◽  
Lead Wire ◽  
Static Fatigue ◽  
Water Mixture ◽  
Aircraft Fuel ◽  
Oil Water ◽  
Protective Performance

In order to improve the survival rate of the strain gauges in the oil-water mixture and pressurization environment in the static/fatigue test of aircraft fuel tank, some key installing and protecting techniques were researched. The protective performance of single and double covering with Different protective agents, the various treatment scopes on the specimen and different lengths of lead wire embedded in the protective coating were investigated in a fuel tank which was designed and manufactured specially for the contrast test. Several effective protective techniques are gained, and when these techniques are applied to the practice, a satisfactory survival rate of strain gauges is reached.

Sign in / Sign up

Export Citation Format

Share Document