A new hemostatic device utilizing a novel transmission structure for delivery of adrenaline and microwave energy at 5.8 GHz

2017 ◽  
Vol 9 (8) ◽  
pp. 1575-1582 ◽  
Author(s):  
Shaun C. Preston ◽  
Malcolm White ◽  
Brian Saunders ◽  
Zacharias Tsiamoulos ◽  
Christoper P. Hancock
Keyword(s):  
Transmission Line ◽  
Microwave Energy ◽  
The Novel ◽  
Good Match ◽  
Porcine Liver ◽  
Microwave Source ◽  
Energy Delivery ◽  
Liver Model ◽  
Transmission Structure ◽  
Coagulation Zone

A novel transmission line structure has been developed to facilitate the delivery of both adrenaline and microwave energy to achieve hemostasis. A proximal end impedance transformer and radiative tip have been designed and manufactured to provide good match between the novel hollow transmission line and the microwave source and tissue, respectively. Further consideration of the challenges and problems encountered along with evidence of successful microwave energy delivery at 5.8 GHz into porcine liver model providing a controlled and focused coagulation zone of approximately 5 mm.

Pattern of thermal damage and tissue carbonisation from endovenous radiofrequency ablation catheter – Using an in vitro porcine liver model

2020 ◽  
pp. 026835552097553
Author(s):  
Emma B Dabbs ◽  
Max I Riley ◽  
Charlotte E Davies ◽  
Olivia H Bishop ◽  
Mark S Whiteley
Keyword(s):  
Thermal Damage ◽  
Lateral Spread ◽  
Porcine Liver ◽  
Vein Wall ◽  
Lower Power ◽  
Damage Area ◽  
Energy Delivery ◽  
Liver Model ◽  
Thermal Spread

Background Successful endovenous thermoablation relies on transmural vein wall ablation. We investigated the pattern of thermal spread and tissue carbonisation from RadioFrequency-induced ThermoTherapy (RFiTT) at different powers and pull back methods, using a porcine liver model. Methods We used a previously validated in-vitro porcine liver model. Different powers from 5–25 W were used to administer 150 J. We compared continuous and pulsed energy delivery. Length, lateral spread, and total area of thermal damage, together with any tissue carbonisation, was measured using digital analysis software. Results All experiments used 150 J total energy. Total thermal damage area was smaller with lower power and pulsed energy. Continuous energy caused more tissue carbonisation than pulsed except at 25 W. Conclusion Reduced thermal damage with lower power or pulsed energy results from cooling due to increased time of treatment. Increasing the power increases tissue carbonisation. Optimal treatment is determined by the highest power used continuously that does not cause tissue carbonisation.

A new haemostatic device utilising a novel transmission structure for delivery of adrenaline and microwave energy at 5.8 GHz

2016 ◽  
Author(s):  
Shaun Preston ◽  
Malcolm White ◽  
Brian Saunders ◽  
Zacharias Tsiamoulos ◽  
Christopher P. Hancock
Keyword(s):  
Microwave Energy ◽  
Transmission Structure

scholarly journals Robotically Assisted Sonic Therapy as a Noninvasive Nonthermal Ablation Modality: Proof of Concept in a Porcine Liver Model

Radiology ◽  
2018 ◽  
Vol 287 (2) ◽  
pp. 485-493 ◽  
Author(s):  
Amanda R. Smolock ◽  
Mircea M. Cristescu ◽  
Eli Vlaisavljevich ◽  
Annette Gendron-Fitzpatrick ◽  
Chelsey Green ◽  
...  
Keyword(s):  
Proof Of Concept ◽  
Porcine Liver ◽  
Liver Model

Effect of Intravenous Morphine Comedication on Bile Duct Visualization, Diameter and Volume Applying Intravenous CT Cholangiography in a Porcine Liver Model

2010 ◽  
Vol 45 (1) ◽  
pp. 26-33 ◽  
Author(s):  
C.M. Sommer ◽  
C.B. Schwarzwaelder ◽  
N. Bellemann ◽  
U. Stampfl ◽  
W. Stiller ◽  
...  
Keyword(s):  
Bile Duct ◽  
Porcine Liver ◽  
Liver Model ◽  
Ct Cholangiography ◽  
Intravenous Morphine

Thermochemical Ablation in an Ex-vivo Porcine Liver Model Using Acetic Acid and Sodium Hydroxide: Proof of Concept

2010 ◽  
Vol 21 (10) ◽  
pp. 1573-1578 ◽  
Author(s):  
Joseph L. Farnam ◽  
Benjamin C. Smith ◽  
Brandon R. Johnson ◽  
Rodolfo Estrada ◽  
Theresa L. Edelman ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Sodium Hydroxide ◽  
Ex Vivo ◽  
Proof Of Concept ◽  
Porcine Liver ◽  
Liver Model

A multi-unit serial inspection robot for power transmission lines

2019 ◽  
Vol 46 (2) ◽  
pp. 223-234 ◽  
Author(s):  
Guanghong Tao ◽  
Lijin Fang
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Power Transmission ◽  
Power Transmission Line ◽  
The Novel ◽  
Power Transmission Lines ◽  
Obstacle Crossing ◽  
Content Type ◽  
Inspection Robot ◽  
Serial Robot

Purpose The purpose of this paper is to introduce a robot mechanism designed for power transmission line inspection. The focus for this design is on obstacle-crossing ability with a goal to create a robot moving and crossing obstacle on not only the straight line but also the steering line. Design/methodology/approach A novel four-unit tri-arm serial robot mechanism is proposed. Every novel unit designed for pitching motion is based on parallelogram structure, which is driven by cables and only one motor. There is gripper-wheel compounding mechanism mounted on the arm. The prototype and obstacle environments are established, and the obstacle-crossing experiments are conducted. Findings The novel unit mechanism and robot prototype have been tested in the lab. The prototype has demonstrated the obstacle-crossing ability when moving and crossing fundamental obstacles on the line. The experimental results show that the robot mechanism meets the obstacle-crossing requirements. Practical implications The novel robot technology can be used for defect inspection of power transmission line by power companies. Social implications It stands to lower the intense and risk of inspection works and reduce the costs related to inspection. Originality/value Innovative features include its architecture, mobility and driving method.

Modeling and Dynamic Analysis of a Novel Hydro-Pneumatic Suspension System

2015 ◽  
Vol 772 ◽  
pp. 188-191
Author(s):  
L. Yang ◽  
Fan Yang ◽  
M.B. Xia
Keyword(s):  
Dynamic Analysis ◽  
Mass Conservation ◽  
Suspension System ◽  
Force Balance ◽  
Optimization Approach ◽  
The Novel ◽  
Good Match ◽  
Pneumatic Suspension ◽  
Simulation Results ◽  
Gas Chamber

This study presents a modeling procedure and dynamic analysis for a novel hydro-pneumatic suspension system, in which the gas chamber has been integrated into the main structures. The modeling of the novel hydro-pneumatic suspension system has been established based on the mass conservation and force balance and the dimension has been obtained through a design optimization approach. The simulation results of the established model have been compared with those obtained through ADAMS, and good match can be observed.

CT-based quantification of short-term tissue shrinkage following hepatic microwave ablation in an in vivo porcine liver model

2020 ◽  
pp. 028418512091445
Author(s):  
Christoph Erxleben ◽  
Stefan M Niehues ◽  
Beatrice Geyer ◽  
Franz Poch ◽  
Keno K Bressem ◽  
...  
Keyword(s):  
Microwave Ablation ◽  
Short Term ◽  
Porcine Liver ◽  
Liver Model ◽  
Tissue Shrinkage
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