keyword
MENU ▼
Read by QxMD icon Read
search

Thermal ablation

keyword
https://www.readbyqxmd.com/read/29777845/recanalization-after-endovenous-thermal-ablation
#1
Afsha Aurshina, Ahmad Alsheekh, Pavel Kibrik, Anil Hingorani, Natalie Marks, Enrico Ascher
OBJECTIVE: Endovenous thermal ablation in the form of radiofrequency ablation (RFA) or endovenous laser ablation (EVLA) has quickly ascended to a prime position in the treatment of venous insufficiency. While there is good data examining the rates of thrombotic complications, there is a relative paucity of data examining the recanalization rates after endovenous thermal ablation (ETA). METHODS: Data analysis was performed for 1475 thermal ablations in 485 patients from 2012-2015 as a retrospective chart review...
May 16, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29773805/new-insights-into-mechanisms-of-material-ejection-in-maldi-mass-spectrometry-for-a-wide-range-of-spot-sizes
#2
Marcel Niehaus, Jens Soltwisch
Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) is widely used for the analysis of large biomolecules in numerous applications. The technique utilizes nanosecond-long laser pulses at various spot sizes to eject and ionize large molecules embedded in a highly absorptive chemical matrix. Despite the methods name, 'molecular desorption' from the matrix crystal surface is not the sole mechanism discussed for material ejection in MALDI, but additional ablation of larger clusters has been reported...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29772927/design-and-simulation-of-novel-laparoscopic-renal-denervation-system-a-feasibility-study
#3
Eunbi Ye, Jinhwan Baik, Seunghyun Lee, Seon Young Ryu, Sunchoel Yang, Eue-Keun Choi, Won Hoon Song, Hyeong Dong Yuk, Chang Wook Jeong, Sung-Min Park
PURPOSE: In this study, we propose a novel laparoscopy-based renal denervation (RDN) system for treating patients with resistant hypertension. In this feasibility study, we investigated whether our proposed surgical instrument can ablate renal nerves from outside of the renal artery safely and effectively and can overcome the depth-related limitations of the previous catheter-based system with less damage to the arterial walls. METHOD: We designed a looped bipolar electrosurgical instrument to be used with laparoscopy-based RDN system...
May 18, 2018: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/29772367/patterns-of-clinical-utilization-of-stereotactic-laser-ablation-sla-an-analysis-of-the-multi-center-prospective-registry
#4
Robert C Rennert, Usman Khan, Stephen B Tatter, Melvin Field, Brian Toyota, Peter E Fecci, Kevin Judy, Alireza M Mohammadi, Patrick Landazuri, Andrew Sloan, Eric Leuthardt, Clark C Chen
BACKGROUND: Stereotactic laser ablation (SLA), also termed laser interstitial thermal therapy (LITT), is a minimally invasive procedure that is increasingly utilized in neurosurgery. We wished to examine how/if SLA is changing the landscape of treatment options for neurosurgical patients. METHODS: Patients undergoing stereotactic laser ablation were prospectively enrolled in the Laser Ablation of Abnormal Neurological Tissue (LAANTERN) registry. Data from the first 100 enrolled patients are presented here...
May 14, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29771774/bronchoscopic-laser-interstitial-thermal-therapy-an-experimental-study-in-normal-porcine-lung-parenchyma
#5
Roberto F Casal, Garrett Walsh, Mark McArthur, Lori R Hill, Maria F Landaeta, Aristides J Armas Villalba, Philip Ong, Labib Debiane, Erik Vakil, Horiana B Grosu, Carlos A Jimenez, David Ost, Roberto Adachi, George A Eapen
BACKGROUND: Population aging and lung cancer screening strategies may lead to an increase in detection of early-stage lung cancer in medical inoperable patients. Recent advances in peripheral bronchoscopy have made it a suitable platform for ablation of small peripheral tumors. METHODS: We investigated the tissue-ablative effect of a diode laser bronchoscopically applied by a laser delivery fiber (LDF) with wide aperture on porcine lung parenchyma. Laser was tested ex vivo and in vivo to identify the most effective power settings and LDF...
May 16, 2018: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/29767633/nanopatterning-on-calixarene-thin-films-via-low-energy-field-emission-scanning-probe-lithography
#6
Xiaoyue He, Peng Li, Pengchong Liu, Xiaoxian Zhang, Xiangqian Zhou, Wei Liu, Xiaohui Qiu
Field-emitted, low-energy electrons from the conducting tip of an atomic force microscope were adopted for nanolithography on calixarene ultrathin films coated on silicon wafers. A structural evolution from protrusion to depression down to a 30 nm spatial resolution was reproducibly obtained by tuning the sample voltage and exposure current in the lithography process. Close analyses of the profiles showed that the nanostructures formed by a single exposure with a high current are almost identical to those created by cumulative exposure with a lower current but an equal number of injected electrons...
May 16, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29766240/pulmonary-thermal-ablation-enables-long-chemotherapy-free-survival-in-metastatic-colorectal-cancer-patients
#7
Mariane Fonck, Jean-Thomas Perez, Vittorio Catena, Yves Becouarn, Laurent Cany, Eric Brudieux, Laure Vayre, Patrick Texereau, Valérie Le Brun-Ly, Véronique Verger, Véronique Brouste, Dominique Bechade, Xavier Buy, Jean Palussière
BACKGROUND: Chemotherapy (ct) is the preferred treatment option in metastatic colorectal cancer (mCRC). The objective of the study was to determine the overall survival (OS), disease-free survival (DFS) and ct-free survival (CFS) of pulmonary thermal ablation (TA) and its place in the treatment of mCRC. PATIENTS AND METHODS: All consecutive patients treated (over 11 years) with percutaneous TA for lung metastasis of colorectal origin were reviewed. All sequences of treatments were considered...
May 15, 2018: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29763378/characterization-of-thermally-activated-metalloenediyne-cytotoxicity-in-human-melanoma-cells
#8
Eric J Keller, Meghan Porter, Joy E Garrett, Meredith Varie, Haiyan Wang, Karen E Pollok, John J Turchi, Jeffrey M Zaleski, Joseph R Dynlacht
Enediynes are a highly cytotoxic class of compounds. However, metallation of these compounds may modulate their activation, and thus their cytotoxicity. We previously demonstrated that cytotoxicity of two different metalloenediynes, including (Z)-N,N'-bis[1-pyridyl-2-yl-meth-(E)-ylidene]octa-4-ene-2,6-diyne-1,8-diamine] (PyED), is potentiated when the compounds are administered to HeLa cells during hyperthermia treatment at concentrations that are minimally or not cytotoxic at 37°C. In this study, we further characterized the concentration, time and temperature dependence of cytotoxicity of PyED on human U-1 melanoma cells...
May 15, 2018: Radiation Research
https://www.readbyqxmd.com/read/29760446/allatostatin-c-modulates-nociception-and-immunity-in-drosophila
#9
Nathaniel D Bachtel, Gary A Hovsepian, Douglas F Nixon, Ioannis Eleftherianos
Bacterial induced inflammatory responses cause pain through direct activation of nociceptive neurons, and the ablation of these neurons leads to increased immune infiltration. In this study, we investigated nociceptive-immune interactions in Drosophila and the role these interactions play during pathogenic bacterial infection. After bacterial infection, we found robust upregulation of ligand-gated ion channels and allatostatin receptors involved in nociception, which potentially leads to hyperalgesia. We further found that Allatostatin-C Receptor 2 (AstC-R2) plays a crucial role in host survival during infection with the pathogenic bacterium Photorhabdus luminescens...
May 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29757217/caveats-to-exogenous-organic-delivery-from-ablation-dilution-and-thermal-degradation
#10
Chris Mehta, Anthony Perez, Glenn Thompson, Matthew A Pasek
A hypothesis in prebiotic chemistry argues that organics were delivered to the early Earth in abundance by meteoritic sources. This study tests that hypothesis by measuring how the transfer of organic matter to the surface of Earth is affected by energy-dissipation processes such as ablation and airbursts. Exogenous delivery has been relied upon as a source of primordial material, but it must stand to reason that other avenues (i.e., hydrothermal vents, electric discharge) played a bigger role in the formation of life as we know it on Earth if exogenous material was unable to deliver significant quantities of organics...
May 12, 2018: Life
https://www.readbyqxmd.com/read/29751343/clavanin-a-bioconjugated-fe-3-o-4-silane-core-shell-nanoparticles-for-thermal-ablation-of-bacterial-biofilms
#11
Kalline L Ribeiro, Isaac A M Frías, Octavio L Franco, Simoni C Dias, Ailton A Sousa-Junior, Osmar N Silva, Andris F Bakuzis, Maria D L Oliveira, Cesar A S Andrade
The use of central venous catheters (CVC) is highly associated with nosocomial blood infections and its use largely requires a systematic assessment of benefits and risks. Bacterial contamination of these tubes is frequent and may result in development of microbial consortia also known as biofilm. The woven nature of biofilm provides a practical defense against antimicrobial agents, facilitating bacterial dissemination through the patient's body and development of antimicrobial resistance. In this work, the authors describe the modification of CVC tubing by immobilizing Fe3 O4 -aminosilane core-shell nanoparticles functionalized with antimicrobial peptide clavanin A (clavA) as an antimicrobial prophylactic towards Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Klebsiella pneumoniae...
April 27, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29749333/unexpected-outcome-following-radiofrequency-ablation-of-a-malignant-biliary-stricture
#12
Andrew J Kruger, Somashekar G Krishna
We present a case of a 60-year-old woman with extrahepatic cholangiocarcinoma and recurrent malignant biliary strictures status post placement of two overlapping distal bile duct uncovered self-expandable metal stents (SEMSs) who presented with biliary obstruction due to tumor/tissue ingrowth. She subsequently underwent radiofrequency ablation (RFA) through SEMS to improve biliary stent patency. Post-RFA, thermal injury was observed in the periampullary mucosa. She later developed acute pancreatitis. This is the first case of RFA-induced acute pancreatitis with endoscopic evidence of thermal injury...
March 2018: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
https://www.readbyqxmd.com/read/29747691/benign-thyroid-nodule-unresponsive-to-radiofrequency-ablation-treated-with-laser-ablation-a-case-report
#13
Silvia Oddo, Margherita Balestra, Lara Vera, Massimo Giusti
BACKGROUND: Radiofrequency ablation and laser ablation are safe and effective techniques for reducing thyroid nodule volume, neck symptoms, and cosmetic complaints. Therapeutic success is defined as a nodule reduction > 50% between 6 and 12 months after the procedure, but a percentage of nodules inexplicably do not respond to thermal ablation. CASE PRESENTATION: We describe the case of a young Caucasian woman with a solid benign thyroid nodule who refused surgery and who had undergone radiofrequency ablation in 2013...
May 11, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/29746284/the-concept-of-oligometastases-in-colorectal-cancer-from-the-clinical-evidences-to-new-therapeutic-strategies
#14
Edouard Massaut, Ali Bohlok, Valerio Lucidi, Alain Hendlisz, Jean Klastersky, Vincent Donckier
PURPOSE OF REVIEW: The concept of oligometastases, defining cancers with limited metastatic capacity and attaining a limited number of secondary sites, is now widely accepted, particularly in colorectal cancer. Currently, however, accurate predictive markers for oligometastatic tumors are still lacking. For this reason, it remains challenging to translate this concept into clinical recommendations. In the present work, we review recent publications on oligometastases in colorectal cancer, showing the evidences for such presentation and underlying the need for the identification of biomarkers, necessary to further develop new therapeutic strategies...
May 4, 2018: Current Opinion in Oncology
https://www.readbyqxmd.com/read/29737950/comparative-effectiveness-of-thermal-ablation-surgical-resection-and-active-surveillance-for-t1a-renal-cell-carcinoma-a-surveillance-epidemiology-and-end-results-seer-medicare-linked-population-study
#15
Minzhi Xing, Nima Kokabi, Di Zhang, Johannes M Ludwig, Hyun S Kim
Purpose To compare adverse events and survival outcomes, including cancer-specific survival and overall survival (OS), in patients with T1aN0M0 renal cell carcinoma (RCC) who are undergoing partial nephrectomy (PN), radical nephrectomy (RN), thermal ablation (TA), or active surveillance (AS). Materials and Methods Through use of the Surveillance, Epidemiology, and End Results-Medicare-linked database from 2002 to 2011 with at least 1 year of consecutive follow-up, a HIPAA-compliant retrospective propensity score-matched study of patients with T1aN0M0 RCC who underwent PN, RN, TA, or AS was performed...
May 8, 2018: Radiology
https://www.readbyqxmd.com/read/29737948/heat-stress-and-hepatic-laser-thermal-ablation-induce-hepatocellular-carcinoma-growth-role-of-pi3k-mtor-akt-signaling
#16
Danielle E Jondal, Scott M Thompson, Kim A Butters, Bruce E Knudsen, Jill L Anderson, Rickey E Carter, Lewis R Roberts, Matthew R Callstrom, David A Woodrum
Purpose To determine if heat stress and hepatic laser thermal ablation induce hepatocellular carcinoma (HCC) growth and to identify growth factors induced by heat stress. Materials and Methods Non-heat-stressed HCC cells were cocultured with HCC cells or hepatocytes that were heat stressed at 37°C (physiologic), 45°C (moderate), or 50°C (severe) for 10 minutes and proliferation monitored with bioluminescence imaging for up to 6 days after heat stress (three experiments). Rats bearing orthotopic N1S1 HCC were randomly assigned to undergo immediate sham or laser thermal (3 W for 60 or 90 seconds; hereafter, 3W×60s and 3W×90s, respectively) ablation of the median (local) or left (distant) hepatic lobe, and tumor growth was monitored with magnetic resonance imaging for up to 18 days after ablation (six or more rats per group)...
May 8, 2018: Radiology
https://www.readbyqxmd.com/read/29734432/a-thermal-protective-urethral-heater-applied-to-modulate-the-prostate-cryoablation-area
#17
B Qian, H Zhao, B Xu, M Lan
BACKGROUND: Urethral warmer and cryoheater are invented and applied in cryoablation to overcome urethral cryoinjury, but these devices cannot be fixed and precisely control the released heat which excessively reduces the effective ablation area. Current warmers enlarge the operation difficulty and decrease the precision in temperature control. OBJECTIVE: A reformed catheter termed urethral heater aims to protect the urethra and simultaneously control the released heat so as to meet the aid of doctors' convenient operation in effective therapy, device fixation and precise heat controllability...
July 2017: Cryo Letters
https://www.readbyqxmd.com/read/29733578/erythrocyte-membrane-modified-janus-polymeric-motors-for-thrombus-therapy
#18
Jingxin Shao, Mona Abdelghani, Guizhi Shen, Shoupeng Cao, David S Williams, Jan C M van Hest
We report the construction of erythrocyte membrane-cloaked Janus polymeric motors (EM-JPMs) which are propelled by near infrared laser (NIR) irradiation, and which are successfully applied in thrombus ablation. Chitosan (a natural polysaccharide with positive charge, CHI) and heparin (glycosaminoglycan with negative charge, Hep) were selected as wall materials to construct biodegradable and biocompatible capsules through the layer-by-layer (LbL) self-assembly technique. By partially coating the capsule with a gold (Au) layer through sputter coating, a NIR-responsive Janus structure was obtained...
May 7, 2018: ACS Nano
https://www.readbyqxmd.com/read/29728585/depletion-of-potassium-and-sodium-in-mantles-of-mars-moon-and-vesta-by-core-formation
#19
E S Steenstra, N Agmon, J Berndt, S Klemme, S Matveev, W van Westrenen
The depletions of potassium (K) and sodium (Na) in samples from planetary interiors have long been considered as primary evidence for their volatile behavior during planetary formation processes. Here, we use high-pressure experiments combined with laser ablation analyses to measure the sulfide-silicate and metal-silicate partitioning of K and Na at high pressure (P) - temperature (T) and find that their partitioning into metal strongly increases with temperature. Results indicate that the observed Vestan and Martian mantle K and Na depletions can reflect sequestration into their sulfur-rich cores in addition to their volatility during formation of Mars and Vesta...
May 4, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29726782/laser-ablation-after-stereotactic-radiosurgery-a-multicenter-prospective-study-in-patients-with-metastatic-brain-tumors-and-radiation-necrosis
#20
Manmeet Ahluwalia, Gene H Barnett, Di Deng, Stephen B Tatter, Adrian W Laxton, Alireza M Mohammadi, Eric Leuthardt, Roukoz Chamoun, Kevin Judy, Anthony Asher, Marco Essig, Jorg Dietrich, Veronica L Chiang
OBJECTIVE Laser Ablation After Stereotactic Radiosurgery (LAASR) is a multicenter prospective study of laser interstitial thermal (LITT) ablation in patients with radiographic progression after stereotactic radiosurgery for brain metastases. METHODS Patients with a Karnofsky Performance Scale (KPS) score ≥ 60, an age > 18 years, and surgical eligibility were included in this study. The primary outcome was local progression-free survival (PFS) assessed using the Response Assessment in Neuro-Oncology Brain Metastases (RANO-BM) criteria...
May 4, 2018: Journal of Neurosurgery
keyword
keyword
97877
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"