17 Neck Liposuction: The Classic Technique

In this paper the biomechanical behavior and numerical evaluation results of three C3-C5 porcine cervical models created with different modeling techniques are shown. The objective of this evaluation is to know the differences between the biomechanical effects on a bone graft, which replaces a damaged C4 vertebral body, a titanium alloy (Ti-6A1-4V) cervical plate, used to isolate the C4 damaged vertebra, and the influence on the compressive loads on the complete and instrumented C3-C5 cervical model. The biomechanical integrity of the healthy C3 and C5 vertebral body after the fixation of the cervical plate using titanium alloy screws is considered. Besides, 2-D Computer Tomography classic technique, 3-D Scanner Z-Corp 700 and a CT scanning Philips Brilliance system was used to create the three FEM models. In addition, 3-D Software as Pro-E Wildfire 4.0, ScanIP 3.1, UGS NX-4 and Geomagics R 10.0 was used to create specific numerical model. Main displacements and von Misses stresses between the upper and lower surfaces of the vertebral bodies and the bone graft and the influence of the titanium alloy (Ti-6A1-4V) screws on the vertebral body of C3 and C5 were evaluated. The contribution of this study is to optimize the actual surgical technique once the numerical results on the FEM model have been analyzed. In other words, the numerical disparity between classic CT techniques versus 3-D modern techniques is established.

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Cardiac Activation Maps Reconstruction: A Comparative Study Between Data-Driven and Physics-Based Methods

Frontiers in Physiology ◽

10.3389/fphys.2021.686136 ◽

2021 ◽

Vol 12 ◽

Author(s):

Amel Karoui ◽

Mostafa Bendahmane ◽

Nejib Zemzemi

Keyword(s):

Neural Networks ◽

Comparative Study ◽

Body Surface ◽

Data Driven ◽

Diagnostic Tools ◽

L1 Norm ◽

Surface Potentials ◽

Body Surface Potential ◽

Data Driven Approach ◽

Classic Technique

One of the essential diagnostic tools of cardiac arrhythmia is activation mapping. Noninvasive current mapping procedures include electrocardiographic imaging. It allows reconstructing heart surface potentials from measured body surface potentials. Then, activation maps are generated using the heart surface potentials. Recently, a study suggests to deploy artificial neural networks to estimate activation maps directly from body surface potential measurements. Here we carry out a comparative study between the data-driven approach DirectMap and noninvasive classic technique based on reconstructed heart surface potentials using both Finite element method combined with L1-norm regularization (FEM-L1) and the spatial adaptation of Time-delay neural networks (SATDNN-AT). In this work, we assess the performance of the three approaches using a synthetic single paced-rhythm dataset generated on the atria surface. The results show that data-driven approach DirectMap quantitatively outperforms the two other methods. In fact, we observe an absolute activation time error and a correlation coefficient, respectively, equal to 7.20 ms, 93.2% using DirectMap, 14.60 ms, 76.2% using FEM-L1 and 13.58 ms, 79.6% using SATDNN-AT. In addition, results show that data-driven approaches (DirectMap and SATDNN-AT) are strongly robust against additive gaussian noise compared to FEM-L1.

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Plivanje u triatlonu

Aktuelno u praksi: bilten za strucna pitanja u fizickoj kulturi ◽

10.5937/aup1601053r ◽

2016 ◽

Vol 26 (1) ◽

pp. 53-58

Author(s):

Silvia Race ◽

Sandra Vujkov

Keyword(s):

Open Water ◽

Classic Technique ◽

Olympic Sport ◽

Swimming Technique ◽

The Way

Triathlon is an Olympic sport that consists of three cyclic events: swimming, running and cycling, which are taking place one after another. Triathlon race begins with swimming, mainly on open water. Even the great sport experts analyze triathlon through each segmental technique. In regards to that, triathlon-swimming technique is not identical to the classic technique in swimmers; moreover, there are significant differences in certain elements. The first triathlon competition was held in 1977 in Hawaii, organized by a group of US Marines. The aim of this paper was to explain the way of training, tactical preparation and other relevant elements related to the swimming part of the triathlon race.

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Comparison of Neural Networks and Logistic Regression in Assessing the Occurrence of Failures in Steel Structures of Transmission Lines

The Open Electrical & Electronic Engineering Journal ◽

10.2174/1874129001610010011 ◽

2016 ◽

Vol 10 (1) ◽

pp. 11-26

Author(s):

A.C.G Bissacot ◽

S.A.B Salgado ◽

P.P Balestrassi ◽

A.P Paiva ◽

A.C Zambroni Souza ◽

...

Keyword(s):

Neural Networks ◽

Logistic Regression ◽

Transmission Lines ◽

Steel Structures ◽

Roc Curves ◽

Operating Voltage ◽

Operating Characteristics ◽

Metal Structures ◽

Land Type ◽

Classic Technique

In this work, we evaluate the probability of falling metal structures from transmission lines. It is our objective to extract knowledge about which variables influence the mechanical behavior of the operating lines and can be used to diagnose potential falling towers. Those pieces of information can become a basis for directing the investments of reinforcement structures, avoiding the occurrence of long turn offs and high costs as a consequence of damage to towers of transmission lines. The results are obtained using the history of 181 metal structures currently in operation in the state of Paraná/Brazil. For the classification of transmission lines susceptible to failures it is proposed to identify the most likely lines considering the following parameters: operating voltage, wind and relief of the region, air masses, temperature, land type, mechanical capacity, function and foundation structure. The classic technique of classifying binary events used in this type of problem is the logistic regression (LR). The more recent technique for classification, using Artificial Neural Networks (ANN) can also be applied. The results are compared through the area under receiver operating characteristics (ROC) curves.

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P90 TRACTION ON THE SEPTUM DURING TRANSORAL SEPTOTOMY FOR ZENKER DIVERTICULUM IMPROVES THE FINAL OUTCOME

Diseases of the Esophagus ◽

10.1093/dote/doz092.90 ◽

2019 ◽

Vol 32 (Supplement_2) ◽

Author(s):

L Provenzano ◽

R Salvador ◽

C Cutrone ◽

L Moletta ◽

E Pierobon ◽

...

Keyword(s):

Symptom Score ◽

Final Outcome ◽

Barium Swallow ◽

Complication Rates ◽

Duration Of Symptoms ◽

Zenker Diverticulum ◽

Before And After ◽

Study Population ◽

Classic Technique ◽

Additional Procedure

Abstract Background Transoral Diverticulostomy/Septotomy has become a popular treatment for patients with Zenker Diverticulum (ZD) because of the low complication rates, reduced procedure time, and shorter hospital stay. However, the outcome of this procedure is not, so far, as positive as the open techniques. In order to improve the results of transoral septotomy (TS), a modification of the technique by tractioning the septum with stiches, has been introduced. In this study we aimed to compare the final outcome of a Modify Transoral Septotomy (MTS) with those of the Traditional Transoral Septotomy (TTS) in patients with ZD. Methods Seventy-seven consecutive patients with ZD underwent Transoral Septotomy between 2010-2019. Patients who had already been treated with surgical or endoscopic procedures were excluded. TTS was performed with the classic technique. Since 2015, we adopted a MTS, by positioning 2 sutures at the lateral edges of the septum, for traction. Symptoms were collected and scored using a detailed questionnaire; barium-swallow (to assess the size of the pouch), endoscopy and manometry were performed before and after surgical treatment. Failures were defined when a patient needed an additional procedure for recurrent symptoms. Results Of the 52 patients representing the study population (M:F=49:28), 25 had TTS and 52 had MTS. The patients’ demographic and clinical parameters (sex, age, symptom-score, duration of symptoms, diverticulum size) were similar in both groups. Only two intraoperative mucosal lesions were detected and mortality was nil. The median time of the procedure was 25 min (IQR:22-35) in the TTS and 30 min (IQR:25-36) in the MTS (p<0.07). The median follow-up was 85 months in the TTS and 24 months in the MTS. All the patients in both groups had a reduction in the symptom score after the procedure but the failure rate was 32% (8/25) in the TTS and 1.9% (1/52) in the MTS (p<0.01). At the univariate and multivariate analyses, the surgical procedure was the only factor predictive of a positive final result. Conclusions Transoral Septotomy improves the final outcome of this treatment in patients with ZD.

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Laparoscopic Splenectomy in Children: A Modified Technique with Joint Sealing of Segmental Splenic Arteries and Veins Favorably Compared with the Classic Technique

European Journal of Pediatric Surgery ◽

10.1055/s-0036-1593979 ◽

2016 ◽

Vol 27 (01) ◽

pp. 091-095 ◽

Cited By ~ 2

Author(s):

Sara Silvaroli ◽

Marianne Montalembert ◽

Frédérique Sauvat ◽

Valentine Brousse ◽

Sabine Sarnacki ◽

...

Keyword(s):

Laparoscopic Splenectomy ◽

Modified Technique ◽

Classic Technique ◽

Arteries And Veins

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Circumcision: postoperative complications that required reoperation

Einstein (São Paulo) ◽

10.1590/s1679-45082018ao4241 ◽

2018 ◽

Vol 16 (3) ◽

Cited By ~ 6

Author(s):

Carolina Talini ◽

Letícia Alves Antunes ◽

Bruna Cecília Neves de Carvalho ◽

Karin Lucilda Schultz ◽

Maria Helena Camargo Peralta Del Valle ◽

...

Keyword(s):

Postoperative Complications ◽

Surgical Technique ◽

Medical Records ◽

Statistical Significance ◽

Postoperative Outcome ◽

Conventional Technique ◽

Significant Difference ◽

Operative Complications ◽

Classic Technique ◽

The Difference

ABSTRACT Objective To evaluate post-operative complications of circumcision requiring surgical reintervention. Methods Retrospective analysis of medical records of patients submitted to circumcision from May 1st, 2015 to May 31st, 2016. Results A total of 2,441 circumcisions were performed; in that, 1,940 using Plastibell and 501 by the classic technique. Complications requiring surgical reintervention were found in 3.27% of patients. When separated by surgical technique, 3.4% of circumcisions using Plastibell device required reoperation, as compared to 3% of conventional technique (p=0.79). Preputial stenosis was most frequently found in classic circumcision, with statistical significance (p<0.001). Bleeding was more frequent when using Plastibell device, but the difference was not statistically different (p=0.37). Patients’ age was also evaluated to investigate if this variable influenced on the postoperative outcome, but no significant difference was found. Conclusion There was no statistically significant difference when comparing complications between the different techniques performed at this hospital. Preputial stenosis was most frequently found in the classic circumcision, while bleeding was more prevalent when using Plastibell device. Patients’ age did not influence in complications.

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Comparison of Two Techniques for Retrograde Tracheal Intubation in Human Fresh Cadavers

Anesthesiology ◽

10.1097/00000542-200601000-00009 ◽

2006 ◽

Vol 104 (1) ◽

pp. 48-51 ◽

Cited By ~ 13

Author(s):

François Lenfant ◽

Mehdi Benkhadra ◽

Pierre Trouilloud ◽

Marc Freysz

Keyword(s):

Tracheal Intubation ◽

Endotracheal Tube ◽

Success Rate ◽

Guide Wire ◽

Cricothyroid Membrane ◽

Simple Modification ◽

Classic Technique ◽

Clinical Conditions ◽

The Impact ◽

Mean Time

Background During retrograde tracheal intubation, the short distance existing between the cricothyroid membrane and vocal cords may be responsible for accidental extubation. The insertion of a catheter into the trachea before the removal of the guide wire may help to cope with this problem. This work was conducted to study the impact of such a modification on the success rate and the duration of the procedure. Methods Procedures of retrograde tracheal intubation following the classic and modified techniques were randomly performed in cadavers (n = 70). The duration of the procedure from the puncture of the cricothyroid membrane to the inflation of the balloon of the endotracheal tube was measured, and, at the end of the procedure, the position of the endotracheal tube was checked under laryngoscopy. The procedure was considered to have failed if it had taken more than 5 min or when the endotracheal tube was not positioned in the trachea. Results The mean time to achieve tracheal intubation was similar in both groups (123 +/- 51 vs. 127 +/- 41 s; not significant), but intubation failed significantly more frequently with the classic technique (22 vs. 8 failures; P < 0.05). All failures were related to incorrect positioning of the endotracheal tube. In four cases, both techniques failed. Conclusions This efficient, simple modification of the technique significantly increases the success rate of the procedure, without prolonging its duration. These data should be confirmed in clinical conditions but may encourage a larger use of the retrograde technique in cases of difficult intubation.

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