Circular Electrodes Research Articles

Modeling and Electrode Design Optimizations of Plano-Plano Langasite Crystal Resonator.

The 3-D finite-element model (FEM) of a Y-cut plano-plano langasite crystal thickness shear mode (TSM) resonator is presented, and Mindlin's theory is used to investigate the optimal electrode shapes and sizes for langasite crystal resonator. Circular and elliptical electrodes of various arc lengths are studied to identify the most optimal electrode design configuration in order to achieve TSM vibration free from any anharmonic modes. Simulation results show that resonators with elliptical electrodes have noticeably better suppression of spurious modes compared to that of circular electrodes. Moreover, spurious mode suppression is accomplished for multiple electrode sizes for the same shape, which greatly differs from Mindlin's theory. Hence, three optimized designs are shortlisted and their mass loading sensitivities are investigated. Circular and elliptical electrodes of the same area show similar responses to added mass, indicating that elliptical electrodes have no apparent advantage over circular electrode in mass sensing applications.

Experimental Analysis of Continuous Vibrations in Dielectric Elastomer Membrane Actuators via Three-Dimensional Laser Vibrometry

Dielectric elastomer (DE) membrane transducers are well known for exhibiting large deformations when subject to high voltage. Furthermore, DEs are characterized by an actuation bandwidth of several kilohertz, which allows their use in high-frequency applications, e.g., acoustic ones. The frequency response of DE membranes depends on many parameters such as geometry, pre-stress, and electrode pattern. By properly designing such parameters, it is possible to control vibration modes and resonance frequencies of the membrane, opening up a number of application scenarios. Motivated by this fact, this work presents the first experimental study of continuous vibrations generated in DE membranes via high-voltage excitation. The system under investigation consists of a squared DE membrane with a circular electrode, preloaded out of plane with a linear spring. Vibrations are generated by applying a broadband high-voltage signal to the DE membrane. A 3D laser vibrometer is used to reconstruct the three-dimensional oscillations of scanning points on the membrane surface. Experimental investigations are performed to study the effects of DE geometry and pre-stress on the membrane motion, in terms of resulting frequency spectrum and vibration modes.

P43-S Different stimuli painful or not may explore diffuse noxious inhibitory control in humans

Background Diffuse noxious inhibitory control (DNIC) can be studied when using different painful stimulations before and after a cold pressor test (CPT). The aim of this study is to affirm a modulation of pain responses when applying CPT in healthy subjects. Methods 15 normal subjects (9 males, 6 females) were included. They signed informed consent. The stimulus was applied on the dorsum of right hand. The CPT was applied on the left foot for five minutes. The intensity of pain was noted on a visual analogic scale (VAS). Evoked potentials (EP) were recorded. The three different types of stimulation were: heat laser stimulus, electrical stimulus with a circular electrode (elec-pain-4 Walter graphtek), cold stimulus with an air puff. The paradigm was: time 1 stimulation baseline; time 2 repeated stimulation baseline then CPT applied for 5 min; time 3 stimulation 5 mn after CPT; time 4 stimulation 30 mn after CPT. Values of VAS were noted. Latencies and amplitudes of vertex potentials N2/P2 were measured. The different sessions were compared between them (student test) as well for psychophysical and EP data. Results Whatever the stimulus, VAS and EP in time 1 and time 2 were not different. The responses were diminished five minutes after CPT and could return to baseline or remain diminished after thirty minutes. Conclusion These paradigms confirm the lack of stimulus specificity able to induce the startup of DNIC. Such techniques may help to study pain control in patients.

Channel-like 360° Isthmocele Treatment with a 16F Mini-Resectoscope: A Step-by-step Technique

To show the technique of hysteroscopic channel-like 360° repair of a cesarean scar defect performed with a Gubbini 16F miniresectoscope (GUBBINI system; Tontarra Medizintechnik, Tuttlingen, Germany). A step-by-step demonstration of the surgical technique using slides, pictures, and a video (an instructive video [Video 1]). A university hospital (Bologna University Hospital, Sant'Orsola-Malpighi Polyclinic, Bologna, Italy). A 35-year-old woman with a history of a previous cesarean section complaining of pelvic pain and postmenstrual spotting. With the vaginoscopic approach, the isthmocele was localized; a high-frequency 90° angled circular loop electrode and pure cutting current of 100 W were used to resect the fibrotic tissue of the proximal (step 1) and distal (step 2) part of the niche. We performed resection not only of the fibrotic tissue underneath the niche but also of the inflamed tissue placed around the niche and on the opposite site (the so-called channel-like 360° endocervical ablation). A high-frequency angled ball electrode was used to obtain focused coagulation of all residual inflamed tissue still present on the niche surface and on the cervical canal walls (step 3); the aim of this step is to facilitate the re-epithelialization of the cervical canal walls by the paraphysiological endocervical epithelium. The procedure was ended by controlling any bleeding of the endocervical vessels by reducing the inflow and pressure of the distending medium and by focused electrocauterization with a ball electrode (step 4). The operative time was 14 minutes. The small diameter of a 16F resectoscope and the use of a miniaturized loop without cervical dilation allow the operative procedures to be performed without cervical dilation and without anatomic distortion of the defect, reducing the risk of complications. The small diameter of the sheaths also makes the surgical gesture faster with an easier and faster approach to the niche compared with isthmocele hysteroscopic standard surgery. The presence of a uterine scar defect is usually asymptomatic or refers to postmenstrual spotting with dark red or brown discharge, dysmenorrhea, dyspareunia, chronic pelvic pain, infertility, or a dull sensation after menstruation. Several factors may play a role in isthmocele development such as a low uterine incision, a deficient suturing technique of the uterine incision, and patient-related factors that impair wound healing or increase inflammation or adhesion formation. Different techniques were used as reconstructive therapies of the cesarean scar defect including laparoscopic or robot-assisted laparoscopic excision, vaginal repair, or hysteroscopic treatment. All of these procedures remove or ablate the niche fibrotic tissue with the aim of relieving symptoms. Asymptomatic cases should not be treated. According to the most recent literature, hysteroscopic repair of a cesarean scar represents an effective and safe surgical option in cases of a symptomatic isthmocele. The persistence of symptoms has been reported in up to 18% of cases, so adequate counseling should be performed before the procedure.

High-Throughput Synthesis and Characterization of PGM-Free PEFC Cathode Catalysts

The high cost of platinum, widely used in the electrode of polymer electrolyte fuel cells (PEFCs), is one of main barriers to the widespread use of fuel cell vehicles. Many studies have focused on reducing the excessive production cost of the fuel cell stack by either decreasing the platinum loading using more active Pt-based catalysts and nanostructured alloys or developing platinum group metal-free (PGM-free) catalysts based on low-cost transition metals (e.g., iron and cobalt), carbon, and nitrogen. This presentation will describe high-throughput techniques for synthesis, physical and chemical characterization, hydrodynamic activity screening, electrode fabrication, and fuel cell performance testing of PGM-free catalysts under the auspices of the U.S. Department of Energy, Energy Efficiency and Renewable Energy, Fuel Cell Technologies Offices’ Electrocatalysis Consortium (ElectroCat) [1]. Argonne’s robotic systems have been utilized to rapidly synthesize unique iron and transition metal-nitrogen-carbon (TM-N-C) catalysts exploring a large number of variables such as nitrogen content, ZIF-8 content, Fe content, TM dopant, and Fe precursor. These variables have been shown to be important factors in determining the activity and stability of the resulting catalysts. The catalysts were synthesized using multi-port ball-milling and multi-sample heat treatment. The ORR activity of synthesized materials was characterized using a newly-developed multichannel flow double electrode cell (m-CFDE), allowing the aqueous hydrodynamic measurement of multiple samples simultaneously and using removable electrode plugs to facilitate the quick change of catalyst [2]. A custom-designed system was utilized to deposit the catalyst-ionomer inks onto the glassy carbon electrodes of the m-CFDE electrode plugs. This system is equipped with a nano-liter injector with exchangeable micro-tips and a computer-controlled XY table mount for the electrode plug to uniformly distribute the ink across the 3 mm x 1 mm glassy carbon electrodes. The ORR activity is correlated with catalyst Fe speciation, as determined using Fe K-edge X-ray absorption spectroscopy (XAFS) and also with catalyst BET and electrochemically-determined surface areas. A segmented 25-electrode array cell was used for the high-throughput performance testing of 25 different types of catalyst in a single membrane-electrode assembly (MEA). The automated electrode deposition system has been used in combination with a custom-designed heated vacuum table and a multi-channel peristatic pump to deposit 25 circular electrodes onto the membrane in the pattern required by the NuVant Systems Inc. array fuel cell hardware [3]. This automated ink dispensing system can be used for precise and even catalyst ink deposition across the small circular array electrodes while minimizing the amount of material required to form those uniform electrodes. This presentation will correlate the performance of the catalysts in the MEA with the catalysts’ ORR activity, physical and chemical properties, and synthesis parameters. Acknowledgements This work was supported by the U.S. Department of Energy, Energy Efficiency and Renewable Energy, Fuel Cell Technologies Office under the auspices of the Electrocatalysis Consortium (ElectroCat). This research used resources of the Advanced Photon Source (APS), a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract DE-AC02-06CH11357. Argonne National Laboratory is managed for the U.S Department of Energy by the University of Chicago Argonne, LLC, under contract DE-AC-02-06CH11357.

Efficient atomization method using a rectangular electrode on an ultrasonic transducer

We have developed an efficient atomization method using modification of a silver electrode on an ultrasonic transducer. A circular silver electrode, which is conventionally used as a standard electrode on a transducer, is chemically replaced with a rectangular silver electrode. The rectangular electrode inherently creates a flattened conical water column, generating laterally directional wobbling perpendicular to the long axis of the rectangular electrode. This directional wobbling generates intense centrifugal force, stretching the water column and reducing the pressure in the column, thus causing more cavitation for effective atomization, achieving 2.93 times more efficient atomization than a standard circular electrode. This method will greatly contribute to the fields of engineering, medicine, and biology where various types of solutions are highly expected to be atomized more efficiently.

High-Quality Magnetotransport in Graphene Using the Edge-Free Corbino Geometry.

We report fabrication of graphene devices in a Corbino geometry consisting of concentric circular electrodes with no physical edge connecting the inner and outer electrodes. High device mobility is realized using boron nitride encapsulation together with a dual-graphite gate structure. Bulk conductance measurement in the quantum Hall effect (QHE) regime outperforms previously reported Hall bar measurements, with improved resolution observed for both the integer and fractional QHE states. We identify apparent phase transitions in the fractional sequence in both the lowest and first excited Landau levels (LLs) and observe features consistent with electron solid phases in higher LLs.

Simultaneous removal of Cd2+ and Zn2+ from aqueous solution using an upflow Al-electrocoagulation reactor: optimization by response surface methodology.

The presence of heavy metals in the environment has increased, and cadmium (Cd) and zinc (Zn) are considered to be among the most dangerous. An upflow Al-electrocoagulation reactor was used to remove Cd2+ and Zn2+ ions from aqueous media. The system consisted of perforated aluminum circular electrodes for fluid distribution with elimination of external agitation. The effect of different parameters, i.e. current intensity, electrolysis time, concentration of Cd2+ and Zn2+ ions and electrolytic support dose were optimized by response surface methodology. The results indicated that increasing the current intensity and the electrolysis time had a positive effect on the elimination efficiency of the pollutant ions. Likewise, increasing the dose of electrolytic support and decreasing the concentration of the pollutants improved the efficiency of the system. The optimal results were: current intensity of 0.4 A, electrolysis time of 40 min, ion concentration of 44.6 mg·L-1 and electrolytic support dose of 0.56 mg·L-1, with the maximum elimination percentages of 96 ± 3.8% and 96 ± 2.7% for Cd2+ and Zn2+, respectively. This study showed that the electrocoagulation process in an upflow electrocoagulation reactor could be successfully applied to remove pollutants from water.

Electrode Structure Effects on Electrostatic Spray System Efficiency for Bladeless Wind Power Generation

The liquid medium can be atomized into small droplets and then it moves towards the reverse direction of the electric field force under the wind action, which can increase overall electrical potential energy of the system and realize the conversion of wind energy to the electric energy. In this paper, multi injection needle mesh electrode is taken in the electrostatic wind power generation system as the research object. Based on the ANSYS simulation platform, electric field distribution and the influence of electric field intensity on spray effect at injection needle in different structure like quadrangular, rhombic, circular and hexagonal high pressure electrodes are studied. The results show that the voltage level of discharge terminal in circular electrode structure is significantly higher than that of the other electrode structures and voltage level is needed for multiple jets significantly lower than the other electrode structures.

Characterization of non-contact measurements of electrolyte concentrations using a printed mutual-capacitive sensor film

We have characterized a non-contact measurement system to concentrations of electrolytic solutions using a sensor film that is pasted on the outer surface of the solution vessel. This sensor film has asymmetrically sized circular electrodes printed facing each other on the both faces of substrate, and operates as a mutual-capacitive sensor. This measurement system shows the response depend on the strength of the electrolyte dissociation. In addition, it is found that the resolution and the sensing range could be controlled by adjusting the frequency of the applied voltage in the range from 10 kHz to 1 MHz.

Design of a Dual-Technology Fusion Sensor Chip with a Ring Electrode for Biosensing Application.

Quartz crystal microbalance (QCM) is still a new high-precision surface detection technique. However, the adsorption quality detected by the QCM currently contains a solvent-coupling quality and cannot separate the actual biomolecular mass. Local surface plasmon resonance (LSPR) can detect the mass of biomolecules, but requires a certain contrast between the solvent of the surrounding medium and the refractive index of the adsorbed layer. The sensor chip, combining two compatible technologies, can realize the simultaneous detection of biomolecules and improve the refractive index sensitivity. The structure of our chip is to prepare the ring-shaped gold electrode on the upper surface of the quartz crystal, the circular gold electrode on the bottom surface, and the spherical gold nanoparticles arrays in the center region of the ring electrode to form a QCM/LSPR dual-technology chip. Through simulation, we finally get the size of the best energy trap by the two electrodes on the upper surface and the lower surface: the ring-top electrode with a thickness of 100 nm, an inner diameter of 4 mm, and an outer diameter of 8 mm; and the bottom electrode with a thickness of 100 nm and a radius of 6 mm. By comparing the refractive index sensitivity, we chose a spherical gold nanoparticle with a radius of 30 nm and a refractive sensitivity of 61.34 nm/RIU to design the LSPR sensor chip.

Extracellular Electrophysiology in the Prostate Cancer Cell Model PC-3.

Although prostate cancer is one of the most common cancers in the male population, its basic biological function at a cellular level remains to be fully understood. This lack of in depth understanding of its physiology significantly hinders the development of new, targeted and more effective treatment strategies. Whilst electrophysiological studies can provide in depth analysis, the possibility of recording electrical activity in large populations of non-neuronal cells remains a significant challenge, even harder to address in the picoAmpere-range, which is typical of cellular level electrical activities. In this paper, we present the measurement and characterization of electrical activity of populations of prostate cancer cells PC-3, demonstrating for the first time a meaningful electrical pattern. The low noise system used comprises a multi-electrode array (MEA) with circular gold electrodes on silicon oxide substrates. The extracellular capacitive currents present two standard patterns: an asynchronous sporadic pattern and a synchronous quasi-periodic biphasic spike pattern. An amplitude of ±150 pA, a width between 50–300 ms and an inter-spike interval around 0.5 Hz characterize the quasi-periodic spikes. Our experiments using treatment of cells with Gd3⁺, known as an inhibitor for the Ca2⁺ exchanges, suggest that the quasi-periodic signals originate from Ca2⁺ channels. After adding the Gd3⁺ to a population of living PC-3 cells, their electrical activity considerably decreased; once the culture was washed, thus eliminating the Gd3⁺ containing medium and addition of fresh cellular growth medium, the PC-3 cells recovered their normal electrical activity. Cellular viability plots have been carried out, demonstrating that the PC-3 cells remain viable after the use of Gd3⁺, on the timescale of this experiment. Hence, this experimental work suggests that Ca2⁺ is significantly affecting the electrophysiological communication pattern among PC-3 cell populations. Our measuring platform opens up new avenues for real time and highly sensitive investigations of prostate cancer signalling pathways.

Narrowband Array Processing Beamforming Technique for Electrical Impedance Tomography.

Electrical impedance tomography (EIT) has a large potential as a two dimensional imaging technique and is gaining attention among researchers across various fields of engineering. Beamforming techniques stem from the array signal processing field and is used for spatial filtering of array data to evaluate the location of objects. In this work the circular electrodes are treated as an array of sensors and beamforming technique is used to localize the object(s) in an electrical field. The conductivity distributions within a test tank is obtained by an EIT system in terms of electrode voltages. These voltages are then interpolated using elliptic partial differential equations. Finally, a narrowband beamformer detects the peak in the output response signal to localize the test object(s). Test results show that the beamforming technique can be used as a secondary method that may provide complementary information about accurate position of the test object(s) using an eight electrode EIT system. This method could possibly open new avenues for spatial EIT data filtering techniques with an understanding that the inverse problem is more likely considered here as a source localization algorithm instead as an image reconstruction algorithm.

Three‐Dimensional Time‐Lapse Geoelectrical Monitoring of Water Infiltration in an Experimental Mine Waste Rock Pile

Core Ideas 3D time‐lapse ERT is used to monitor water infiltration for mining environmental issues. Geoelectrical images provide information where no hydrogeological data is available. Water resistivity must be taken into account to understand bulk resistivity variations. Electrical resistivity of water is used as a tracer to reconstruct water infiltration. Infiltration model integrating both hydrogeological and geophysical data is proposed. Open‐pit mines often generate large quantities of waste rocks that are usually stored in waste rock piles (WRPs). When the waste rocks contain reactive minerals (mainly sulfides), water and air circulation can lead to the generation of contaminated drainage. An experimental WRP was built at the Lac Tio mine (Canada) to validate a new disposal method that aims to limit water infiltration into reactive waste rocks. More specifically, a flow control layer was placed on top of the pile, which represents a typical bench level, to divert water toward the outer edge. Hydrogeological sensors and geophysical electrodes were installed for monitoring moisture distribution in the pile during infiltration events. A three‐dimensional (3D) time‐lapse hydrogeophysical monitoring program was conducted to assess water infiltration and movement. Readings from the 192 circular electrodes buried in the WRP were used to reconstruct the 3D bulk electrical resistivity (ER) variations over time. A significant effort was devoted to assessing the spatiotemporal evolution of water ER because the bulk ER is strongly affected by water quality (and content). The water ER was used as a tracer to monitor the infiltration and flow of resistive and conductive waters. The results indicate that the inclined surface layer efficiently diverts a large part of the added water away from the core of the pile. Local and global models of water infiltration explaining both bulk and water ER variations are proposed. The results shown here are consistent with hydrogeological data and provide additional insights to characterize the behavior of the pile.

Efficacy of DBD Plasma Generator with Different Shapes and Materials of Electrodes for Reducing the Microbial Contamination of Herb Powder

This paper studies the efficacy of a dielectric barrier discharge (DBD) plasma generator with circular and square electrodes with stainless steel and copper materials in the reduction of microbial contamination in herbs. Four types of electrodes are used: copper and stainless-steel square electrodes of the size 110×110 mm2 and circular electrodes with a 94 mm diameter. The voltage supplied to plasma generator varies between 5 - 15 kV and the frequency is between 1 - 7 kHz. Licorice (Glycyrrhiza glabra Linn.) and sappan tree (Ceasalpinia sappan Linn.) herb powders were packed in polyethylene bags of the size 89×89 mm2 and tested for microbial contamination before and after the plasma irradiation. The samples were treated with plasma for 5, 10, 15, 20, 25 and 30 min. The results indicated that plasma treatment of 30 min is the most effective time for reducing in the aerobic plate count and yeast and mold count of licorice herb powder. This plasma treatment condition effectively reduced initial the aerobic plate count and yeast and mold count from 8.00×104 to 1.30×103 CFU/g and 4.20×102 to 8.0×10 CFU/g, respectively. Escherichia coli were not founded in the control sample and plasma treatment samples (MPN/g < 3.0). The results revealed that plasma treatment reduced microbial contamination to acceptable levels in herb seasoning as indicated in TCP 1380/2550. In sappan tree powder, plasma irradiation also effectively reduced artificially contaminated of Bacillus subtilis in sappan herb.

A Hand-Held Point-of-Care Biosensor Device for Detection of Multiple Cancer and Cardiac Disease Biomarkers Using Interdigitated Capacitive Arrays.

This paper presents a hand-held point-of-care device that incorporates a lab-on-a-chip module with interdigitated capacitive biosensors for label-free detection of multiple cancer and cardiovascular disease biomarkers. The developed prototype is comprised of a cartridge incorporating capacitive biodetection sensors, a sensitive capacitive readout electronics enclosed in a hand-held unit, and data analysis software calculating the concentration of biomarkers using previously stored reference database. The capacitive biodetection sensors are made of interdigitated circular electrodes, which are preactivated with single (for detecting one biomarker) or multiple specific antibodies (for detecting multiple disease biomarkers). Detection principle of capacitive biosensor is based on measuring the level of capacitance change between interdigitated electrode pairs induced by the change in dielectric constant due to affinity-based electron exchange in between antibodies/antigens and electrodes. The more antibody-antigens binding occurs, the more capacitance change is measured due to the change in dielectric constant of the capacitance media. The device uses preactivated ready-to-use cartridges embedded with capacitive biosensors with shelf-life of three months under optimal conditions, and is capable of onsite diagnosis and can report the result in less than 30 min. The device is verified with real patient blood samples for six different disease biomarkers.

Performance of Practical Grounding Systems under High Impulse Conditions

This paper investigates the factors affecting the impulse characteristics of purposely built grounding systems. We installed 2 m × 2 m grounding systems in four different sites with different soil resistivity values. The effect of impulse polarity on soil characteristics was also investigated for different soil resistivity. A circular ring electrode was used as a return electrode in all four sites. For one of the sites, different configurations of grounding systems were installed to allow the study of the effect of ground electrode configurations on soil characteristics. The aim of this study was to quantify the effects of soil resistivity, impulse polarity, and earth electrode configurations on soil electrical properties under high impulse conditions by field measurements. The new data could be useful in understanding the characteristics of grounding systems in various factors under high impulse conditions. It is hoped that by considering these factors, it can help optimize the design of earthing systems.

Piezoelectric MEMS Disk-Shaped and Ring-Shaped Resonators Utilizing Lamb Wave

Objective: This paper discusses analytically and by simulation, a novel disk and ring-shaped piezoelectric micromechanical acoustic resonators in which asymmetric Lamb wave mode is induced in a thin-film aluminum nitride (AlN)-on-silicon structure. Method: The piezoelectric resonators are designed and simulated at two-port state by the aid of FEM tool. An analytical investigation is carried out in order to study the propagation of asymmetric lamb wave in a cylinder structure. Circular electrodes are utilized for excitation of intended order of asymmetric acoustic Lamb wave in the structures. Due to the significance of feedthrough capacitances in the piezoelectric MEMS resonators in high-frequency applications, these capacitances are calculated and extracted. Several electrodes and tethers configurations are introduced and simulated by FEM simulation in order to study distortion of resonator structures. Result: Stress-free nodal zones close to the resonators outer edge are identified and support tethers, which are used to anchor the resonators, are connected to those points by applying the notch method. Connecting anchoring tethers to stress-free nodal zones considerable decreased tether deformation leading to lower loss for resonators. The prototype models of structures work at 307 MHz and 318 MHz for the disk-shaped and ring-shaped resonators, respectively. Numerous transient and harmonic analysis have been carried out in order to study resonators behavior at the fundamental mode and their spurious electrical response. Conclusion: The proposed structures in this paper can be a promising choice for different applications ranging from RF filter, RF oscillators, RF micromachined circuits and physical and biochemical sensors.

Electroforming-free resistive switching in polycrystalline YMnO3 thin films

Polycrystalline YMnO3 thin films sandwiched between an un-patterned bottom electrode (Pt or Pt/Ti) and a circular top electrode (Au or Al) reveal an electroforming-free, unipolar resistive switching. We report YMnO3 resistive switching devices endurance depending on the bottom electrode and the top electrode. The number of loading cycles of the Al/YMnO3/Pt resistive switch is larger than 103. The resistance ratio between the high resistance (OFF) and the low resistance (ON) state is larger than 104, which can be further increased to 105 by decreasing the diameter of the Al top electrode.

The features of electric welding colorectal anastomosis creation in experiment and clinics

The frequency of colorectal anastomosis leak is significantly higher than other intestinal, up to 19%. The anastomosis, created by electro-weld method, had productive type of inside healing. Aim — to evaluate the technical features and efficiency of electro-welded colorectal anastomosis (EWCRA), in comparison with other types of intestinal welded anastomoses. 8 EWCRAs were created at chronic experiment in the distal third of the direct segment of the swine colon. After analyzing their effectiveness, EWCRA was applied in 4 patients: two at a distance of 3-4 cm from the anal sphincter, and two at the level of the upper ampulla unit. Previous radiation was received by 2 patients. The age of the patients was 40–79 years old. EWCRA was applied in a moment, end to end, by using a tool with circular electrodes, and devices — sources of electric welding impulses EK-300M1 and Patonmed EKVZ-300, produced by the Electric Welding Institute. In pigs weighing 45–75 kg. this instrument was inserted into the rectal lumen through proximal colotomy, in humans — via transanal. Welding influence at the EWCRA was controlled visually, and by the impedance curve flow on the control apparatus screen. In the experiment, EWCRA healing was morphologically investigated in the planned healing periods. When fixing the gut on the instrument, the rigidity of rectal walls was noted, which required additional efforts to compress the electrodes to smooth the walls along the electrodes surface. During the test of rectal swelling with colored liquid, all EWCRAs were sealed. Pigs got up after 6–12 hours in an attempt to drink; by the end of the day, 7 out of 8 pigs had already demanded food. In the 2 pigs, the gut was empty at the end of the first postoperative period, at 6 - during the second (on average 25.4±5.1 hours). The thickness of the EWCRA substrate reached 0.3 mm. Recovery of EWCRA occurred initially, without signs of destruction of the welded tissue substrate and the intestinal walls around the EWCRA, by the typical post-welding productive proliferation healing type. In one patient, the leak of the lower EWCRA was detected on the 7th day, against the stool continuity, after the intestinal contents appearance by drainage. The patient got a stoma and recovered. In patients first stool was observed after 29–57 hours after the operation, including a patient with anastomosis dehiscence (48 hours). None had a feeling of obstruction, unbridled imperative calls to the chair etc. According to the endoscopy, the ulceration of the EWCRA site was limited by the epithelial layer, and did not lead to bleeding or necrosis deepening. One patient with an electrically welded descendent-rectoanastomosis, died on the 4th day as a result of acute cerebrovascular disruption. According to autopsy, EWCRA did not show signs of failure, the pattern of healing was consistent with productive inflammation, with the presence of a continuous connection, a powerful fibrilogenesis of the permeation zone of collagen fibers, the network of functioning newly formed small vessels of granulation tissue, the absence of tissue fragmentation. Of the 3 patients with EWCRA, it was traced up to 2 years — 3 patients, 3 years — 2, 5 years — 1. They did not have purulent complications. There was no ulceration or narrowing of the intestine through the EWCRA line, the gut lumen was restored, the mucosal folds were restored near the connection line. So, the electric-welded tool with circular electrodes using enables the in-moment colorectal anastomosis creation after the low anterior resection of the rectum. The greater the thickness of the muscular lays of the human rectum, and its individual diameter variations require to use a number of special tools.