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Thermal surgery

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https://www.readbyqxmd.com/read/28812023/use-of-a-polyethylene-bag-to-reduce-perioperative-regional-and-whole-body-heat-losses-in-low-birth-weight-neonates
#1
Pierre Tourneux, Estelle Durand, Amandine Pelletier, Laurent Ghyselen, Véronique Bach, Jean-Pierre Libert
In the delivery room, wrapping a low-birth-weight neonate (defined as ≤2.499 g) in a polyethylene bag reduces the risk of hypothermia. However, extended use of the bag (e.g., during neonatal surgery) might conceivably increase the risk of thermal stress and thus body overheating. Here, we assessed the efficacy of a polyethylene bag in infants assigned to wrap (W) or nonwrap (NW, control) groups during placement of a percutaneous vena cava catheter by applying a new mathematical model that calculates heat exchanges for covered and uncovered body segments...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28812002/image-guided-thermal-ablation-with-mr-based-thermometry
#2
REVIEW
Mingming Zhu, Ziqi Sun, Chin K Ng
Thermal ablation techniques such as radiofrequency, microwave, high intensity focused ultrasound (HIFU) and laser have been used as minimally invasive strategies for the treatment of variety of cancers. MR thermometry methods are readily available for monitoring thermal distribution and deposition in real time, leading to decrease of incidents of normal tissue damage around targeted lesion. HIFU and laser-induced thermal therapy (LITT) are the two widely accepted tumor ablation techniques because of their compatibility with MR systems...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28809681/a-prototype-therapy-system-for-transcutaneous-application-of-boiling-histotripsy
#3
Adam D Maxwell, Petr V Yuldashev, Wayne Kreider, Tatiana D Khokhlova, George R Schade, Timothy L Hall, Oleg A Sapozhnikov, Michael R Bailey, Vera A Khokhlova
Boiling histotripsy is a method of focused ultrasound surgery that noninvasively applies millisecond-length pulses with high-amplitude shock fronts to generate liquefied lesions in tissue. Such a technique requires unique outputs compared to a focused ultrasound thermal therapy apparatus, particularly to achieve high in situ pressure levels through intervening tissue. This article describes the design and characterization of a system capable of producing the necessary pressure to transcutaneously administer boiling histotripsy therapy through clinically relevant overlying tissue paths using pulses with duration up to 10 ms...
August 14, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28806375/physics-and-histologic-evaluation-of-rotary-ultrasonic-and-sonic-instruments
#4
Emanuele Ruga, Ettore Amerio, Vincenzo Carbone, Marco Volante, Sergio Gandolfo
Rotary instruments (RIs) are the most commonly used to perform osteotomies in many fields of medicine. Owing to a new interest in performing a minimally invasive surgery, over last fifteen years new devices have been used in oral surgery such as ultrasonic instruments (UIs) and, lately, sonic instruments (SIs). Nowadays, bone preservation and regeneration are paramount in many clinical situations and, consequently, it is crucial to rely upon instruments, which cause the least tissue damage during the surgery...
August 10, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28803514/investigation-sensitivity-analysis-and-multi-objective-optimization-of-effective-parameters-on-temperature-and-force-in-robotic-drilling-cortical-bone
#5
Vahid Tahmasbi, Majid Ghoreishi, Mojtaba Zolfaghari
The bone drilling process is very prominent in orthopedic surgeries and in the repair of bone fractures. It is also very common in dentistry and bone sampling operations. Due to the complexity of bone and the sensitivity of the process, bone drilling is one of the most important and sensitive processes in biomedical engineering. Orthopedic surgeries can be improved using robotic systems and mechatronic tools. The most crucial problem during drilling is an unwanted increase in process temperature (higher than 47 °C), which causes thermal osteonecrosis or cell death and local burning of the bone tissue...
August 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28800725/a-novel-thermal-compression-device-for-perioperative-warming-a-randomized-trial-for-feasibility-and-efficacy
#6
Peter Luke Santa Maria, Chloe Santa Maria, Andreas Eisenried, Nathalia Velasquez, Brian Thomas Kannard, Abhinav Ramani, David Mark Kahn, Amanda Jane Wheeler, John Gerhard Brock-Utne
BACKGROUND: Inadvertent perioperative hypothermia (IPH) leads to surgical complications and increases length of stay. IPH rates are high with the current standard of care, forced air warming (FAW). Our hypothesis is that a prototype thermal compression device that heats the popliteal fossa and soles of the feet, with lower leg compression, increases perioperative temperatures and reduces IPH compared to the current standard of care. METHODS: Thirty six female breast surgery patients, at a tertiary academic hospital, were randomized to the device or intraoperative FAW (stage I) with a further 18 patients randomized to the device with a single heating area only (stage II, popliteal fossa or sole of the feet)...
August 11, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28797186/ethanol-and-thermal-ablation-for-malignant-thyroid-tumours
#7
So Yeong Jeong, Jung Hwan Baek, Young Jun Choi, Jeong Hyun Lee
Papillary thyroid carcinoma (PTC) is the most common subtype of thyroid malignancy and has a good prognosis and low mortality rate. Surgery is the standard treatment for patients with primary and recurrent thyroid cancer. Although patients with PTC usually exhibit excellent treatment outcome, the incidence of recurrence in the neck ranges from 20% to 59%. When a patient with thyroid cancer is contraindicated for surgery, ultrasound (US)-guided ablation techniques, including ethanol ablation (EA) and thermal ablations, are suggested alternatives...
August 11, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28791231/medium-term-efficacy-of-the-prostatic-urethral-lift
#8
REVIEW
Peter Chin, Peter Robertson
Treatment options for patients with benign prostatic hyperplasia have traditionally revolved around pharmacotherapy or invasive surgery, both of which can negatively impact quality of life (QoL). The quest for a suitable minimally invasive surgical therapy as an alternative to long-term medication or conventional surgery, has seen the development of heat-based therapies, most of which have been dismissed because of post-operative complications and unacceptable re-treatment rates. During the late 1980s and 1990s, mechanical approaches such as transurethral balloon dilation and prostatic urethral stenting were investigated; however, re-treatment rates, encrustation and unacceptable migration rate of stents saw these options fall into disuse...
July 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28789985/interleukin-8-levels-in-rat-models-of-nerve-damage-and-neuropathic-pain
#9
Junad Khan, Humza Hassun, Tali Zusman, Olga Korczeniewska, Eli Eliav
Interleukin-8 (IL-8) is a pro-inflammatory cytokine that has been shown to play a role in inflammatory and autoimmune disorders. The objective of the present study was to assess the levels of IL-8 in rat serum, dorsal root ganglion (DRG) and the sciatic nerve following four different forms of sciatic nerve injury. The models used to induce the injury included partial sciatic ligation (PSL), chronic constriction injury (CCI), perineural inflammation (neuritis) and complete sciatic transection (CST). Mechanical and thermal hyperalgesia were detected by measuring withdrawal responses from a mechanical stimulus and withdrawal latency from thermal stimulation...
August 5, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28782115/optical-coherence-tomography-image-guided-smart-laser-knife-for-surgery
#10
Nitesh Katta, Austin B McElroy, Arnold D Estrada, Thomas E Milner
BACKGROUND AND OBJECTIVE: Surgical oncology can benefit from specialized tools that enhance imaging and enable precise cutting and removal of tissue without damage to adjacent structures. The combination of high-resolution, fast optical coherence tomography (OCT) co-aligned with a nanosecond pulsed thulium (Tm) laser offers advantages over conventional surgical laser systems. Tm lasers provide superior beam quality, high volumetric tissue removal rates with minimal residual thermal footprint in tissue, enabling a reduction in unwanted damage to delicate adjacent sub-surface structures such as nerves or micro-vessels...
August 7, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28777648/ablation-of-musculoskeletal-metastases
#11
A Nicholas Kurup, Jonathan M Morris, Matthew R Callstrom
OBJECTIVE: The purpose of this article is to summarize the evidence supporting thermal ablation of musculoskeletal metastases on the basis of clinical application and to describe an approach to percutaneous ablative treatment, including patient workup, procedural strategy and techniques, and postablation follow-up. CONCLUSION: Percutaneous ablation of musculoskeletal metastases may result in significant pain palliation, prevention of morbidity from skeletal-related events, and local tumor control...
August 4, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28774708/epileptologist-s-view-laser-interstitial-thermal-ablation-for-treatment-of-temporal-lobe-epilepsy
#12
Joon Y Kang, Michael R Sperling
A procedure called laser interstitial thermal ablation has been utilized to treat drug resistant epilepsy. With this technique, a probe is stereotactically inserted into a target structure responsible for seizures, such as mesial temporal lobe, hypothalamic hamartoma, or a small malformation of cortical development, and the tip is then heated by application of laser energy to ablate structures adjacent to the probe tip. This procedure has the advantage of selectively targeting small lesions responsible for seizures, and is far less invasive than open surgery with shorter hospitalization, less pain, and rapid return to normal activities...
July 25, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28767808/preliminary-results-of-severe-venous-insufficiency-treatment-with-thermal-ablation-of-the-great-saphenous-vein-by-endovascular-technique-with-laser-diode-980nm-developed-in-brazil-associated-with-sclerotherapy-with-polidocanol
#13
Matheus Bertanha, Marcone Lima Sobreira, Paula Angelelli Bueno Camargo, Rafael Elias Farres Pimenta, Jamil Victor Oliveira Mariúba, Regina Moura, Vanderlei Salvador Bagnato, Winston Bonetti Yoshida
The endovenous laser ablation (EVLA) of the insufficient saphenous vein has similar results to open conventional surgery, but less morbidity. The echo-guided polidocanol foam sclerotherapy technique has been used for the same purpose. The combined techniques may play a role for more severe diseases, such as those with varicose ulcers. An EVLA device (called VELAS) has been developed in the Optics and Photonics Research Center of USP-São Carlos in agreement with FMB-UNESP. In this study, we present the preliminary results of the VELAS device (MMO 980nm diode) in patients with chronic venous ulcer, associated with echo-guided polidocanol foam sclerotherapy for the treatment of varicosities...
May 2017: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28746067/perturbing-nr2b-psd-95-interaction-relieves-neuropathic-pain-by-inactivating-camkii-creb-signaling
#14
Fangxia Xu, Xin Zhao, Lin Liu, Jia Song, Yingjun Zhu, Shuaishuai Chu, Xueming Shao, Xiuxiu Li, Zhengliang Ma, Xiaoping Gu
Neuropathic pain is characterized by central sensitization. The interaction between N-methyl-D-aspartate receptors (NMDARs) and postsynaptic density protein-95 (PSD-95) plays a major role in central sensitization. Here, we aimed to investigate the analgesic effect of disruption of the interaction between NMDAR and PSD-95. Chronic dorsal root ganglia compression model rats were used to mimic sciatica. Thermal hyperalgesia and mechanical allodynia were evaluated. The expression of spinal phospho-NR2B, PSD-95, calcium/calmodulin-dependent protein kinase II (CaMKII), and cAMP response element binding protein (CREB) was measured using western blotting...
September 6, 2017: Neuroreport
https://www.readbyqxmd.com/read/28738356/thermal-preconditioning-may-prevent-tendon-adhesion-by-up-regulating-hsp72-in-rats
#15
Yang Tan, Qin-Fen Wu, Qiang Wu, Xin-Ti Tan, Liao-Bin Chen, Xin Wang
BACKGROUND/AIMS: The study aims to determine the effects of thermal preconditioning on tendon adhesion by regulating the expression of heat shock protein 72 (HSP72) in rat models. METHODS: Sixty male Wistar rats were collected and randomly assigned into the thermal preconditioning and control groups. During the 4th and 8th weeks following surgery, 15 rats were sacrificed in each period respectively, and their tendon adhesion was observed and evaluated. Biomechanical testing was performed to measure the tensile strength and gliding distance of tendons...
July 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28735511/infrared-thermal-imaging-a-potential-tool-used-in-open-colorectal-surgery
#16
Vladan Bernard, Vladimír Čan, Erik Staffa, Martina Farkašová, Michaela Němcová, Marek Dostál, Zdeněk Kala, Vojtěch Mornstein
Aim of this pilot study was to assess blood perfusion of bowel in resection lines by means of the infrared thermal imaging in order to choose the best place for anastomosis. The paper brings a first experience with infrared thermal imaging used in colorectal surgery operation from initial observation of the patient with T3 adenomatous carcinoma with no lymph node metastasis. The obtained infrared images show a clear boundary between parts of the intestine with blood perfusion and without it. The proposed position of resection of colon identified by infrared camera is in accordance with routinely designated position...
October 2017: Minerva Chirurgica
https://www.readbyqxmd.com/read/28732417/expanding-spectrum-and-diversifying-role-of-laser-beam-from-intraoperative-cranial-surgery-adjunct-to-magnetic-resonance-guided-minimally-invasive-thermal-laser-ablation-therapy-for-intracranial-tumor
#17
https://www.readbyqxmd.com/read/28723961/dysfunctional-gpr40-ffar1-signaling-exacerbates-pain-behavior-in-mice
#18
Kazuo Nakamoto, Fuka Aizawa, Kei Miyagi, Takuya Yamashita, Mitsumasa Mankura, Yutaka Koyama, Fumiyo Kasuya, Akira Hirasawa, Takashi Kurihara, Atsuro Miyata, Shogo Tokuyama
We previously showed that activation of G protein-coupled receptor 40/free fatty acid receptor 1 (GPR40/FFAR1) signaling modulates descending inhibition of pain. In this study, we investigated the involvement of fatty acid-GPR40/FFAR1 signaling in the transition from acute to chronic pain. We used GPR40/FFAR1-knockout (GPR40KO) mice and wild-type (WT) mice. A plantar incision was performed, and mechanical allodynia and thermal hyperalgesia were evaluated with a von Frey filament test and plantar test, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28721494/a-comprehensive-characterization-of-parameters-affecting-high-frequency-irreversible-electroporation-lesions
#19
Tyler Miklovic, Eduardo L Latouche, Matthew R DeWitt, Rafael V Davalos, Michael B Sano
Several focal therapies are being investigated clinically to treat tumors in which surgery is contraindicated. Many of these ablation techniques, such as radiofrequency ablation and microwave ablation, rely on thermal damage mechanisms which can put critical nerves or vasculature at risk. Irreversible electroporation (IRE) is a minimally invasive, non-thermal technique to destroy tumors. A series of short electric pulses create nanoscale defects in the cell membrane, eventually leading to cell death. Typical IRE protocols deliver a series of 50-100 µs monopolar pulses...
July 18, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28718950/radiofrequency-ablation-for-the-management-of-thyroid-nodules-a-critical-appraisal-of-the-literature
#20
REVIEW
Roberto Cesareo, Andrea Palermo, Valerio Pasqualini, Roberto Cianni, Gianluigi Gaspa, Silvia Manfrini, Claudio Maurizio Pacella
The majority of benign thyroid nodules are asymptomatic, remain stable in size and do not require treatment. However, a minority of patients with growing nodules may have local symptoms or cosmetic concerns, and thus demand surgical therapy. The timely use of ultrasound-guided, minimally invasive thermal therapies has changed the natural history of benign, enlarging thyroid nodules (TNs). These procedures produce persistent shrinkage of TNs and an improvement of local symptoms. Among the various procedures, percutaneous ethanol injection represents the first-line treatment for thyroid cysts, while in solid cold nodules, laser and radiofrequency ablation (RFA) have proven to be very effective and safe techniques in producing significant volume reduction that remains stable over several years...
July 18, 2017: Clinical Endocrinology
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