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Minimally Invasive Therapy & Allied Technologies: MITAT

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https://www.readbyqxmd.com/read/29141515/mri-powered-biomedical-devices
#1
Sierra Hovet, Hongliang Ren, Sheng Xu, Bradford Wood, Junichi Tokuda, Zion Tsz Ho Tse
Magnetic resonance imaging (MRI) is beneficial for imaging-guided procedures because it provides higher resolution images and better soft tissue contrast than computed tomography (CT), ultrasound, and X-ray. MRI can be used to streamline diagnostics and treatment because it does not require patients to be repositioned between scans of different areas of the body. It is even possible to use MRI to visualize, power, and control medical devices inside the human body to access remote locations and perform minimally invasive procedures...
November 16, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29130739/trans-umbilical-laparoscopic-assisted-appendectomy-in-the-pediatric-population-comparing-single-incision-and-2-trocar-techniques
#2
Mariana Borges-Dias, Leonor Carmo, Ruben Lamas-Pinheiro, Tiago Henriques-Coelho, José Estevão-Costa
INTRODUCTION: Trans-umbilical laparoscopic-assisted appendectomy (TULAA) combines advantages of open surgery with benefits of laparoscopy and can be performed either by single-incision or with two trocars; the present study aims to compare outcomes and cost of these techniques in a pediatric serie. MATERIAL AND METHODS: Patients undergoing TULAA between July 2013 and June 2014 were retrospectively reviewed. There were two groups: A (single-incision) - one umbilical trocar for a telescope with inbuilt working channel; and B (2-trocar) - one umbilical trocar for a 'standard' telescope plus a supra-pubic trocar for instruments...
November 13, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29126350/newly-developed-triaxial-microcatheter-for-complicated-interventions
#3
Masashi Shimohira, Kengo Ohta, Kazushi Suzuki, Taeko Goto, Yusuke Sawada, Yuta Shibamoto
Recent advances have been made in the development of microcatheters, and have contributed to super-selective catheterization. One new tool is the triple co-axial (triaxial) system, which consists of a small microcatheter, large microcatheter, and 4- or 5-Fr. catheter. This system may be applied to complex interventions. We herein introduce the technique for and advantages of the triaxial system.
November 10, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29113514/microballoon-related-interventions-in-various-endovascular-treatments-of-body-trunk-lesions
#4
Tomohiro Matsumoto, Kosuke Tomita, Satoshi Suda, Kazunobu Hashida, Shunto Maegawa, Toshihiko Hayashi, Takuji Yamagami, Tetsuya Suzuki, Terumitsu Hasebe
Occlusion balloon catheters of 5.2- or 6-French have been used for a few decades in various endovascular treatments of body trunk vascular lesions. However, these catheters may be difficult to place in cases of excessive vessel tortuosity, small vessels, and anatomic complexity. Recently, the introduction of the double lumen microballoon catheters for body trunk vascular lesions has allowed operators to advance them into more distal, smaller, and more tortuous vessels. Since the launch of the first generation microballoon catheters onto the market in Japan in 2011, the microballoon catheters have evolved and are now generally available for clinical use...
November 7, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28982276/it-is-time-for-a-better-clip-applier-3%C3%A2-mm-percutaneous-non-crushing-and-locking
#5
Jonathan B Yuval, Daniel J Weiss, Adrian Paz, Yehuda Bachar, Ronit Brodie, Yinon Shapira, Yoav Mintz
INTRODUCTION: Since the advent of laparoscopy there have been attempts to minimize abdominal wall incisions. For this purpose smaller instruments have been produced. Our aim was to develop the first 3 mm percutaneous clip applier and to make it better than the standard clips of today. MATERIAL AND METHODS: The ClipTip clip is made of Nitinol and has a crocodile shaped jaws, which when apposed effectively seal vessels. The shaft operates as a retractable needle permitting percutaneous insertion...
October 6, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28949276/percutaneous-trans-apex-intra-septal-radiofrequency-ablation-of-hypertrophic-cardiomyopathy
#6
Lei Zuo, Chao Sun, Jian Yang, Bing Liu, Mengyao Zhou, Ruiqi Guo, Shiqiang Yu, Junbo Ge, Lize Xiong, Liwen Liu
A 70-year-old woman presented with severe hypertrophic obstructive cardiomyopathy (HOCM) (maximum ventricular septum thickness of 28 mm, peak pressure gradient (PG) in the left ventricular outflow tract (LVOT) of 153 mmHg). We performed percutaneous trans-apex intra-septal radiofrequency ablation (PTAISRA) of the interventricular septum under guidance of transthoracic echocardiography. At six-months follow up, the symptoms were significantly relieved; the septal thickness was reduced to 18 mm and the peak LVOT PG reduced to 44 mmHg...
September 26, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28925798/laparoscopic-resections-of-colorectal-cancer-and-synchronous-liver-metastases-a-case-controlled-study
#7
Xiao Xu, Yulin Guo, Guijin Chen, Chen Li, Hongguang Wang, Guanglong Dong
PURPOSE: To investigate the efficacy and safety of laparoscopic simultaneous resections of colorectal cancer and synchronous colorectal liver metastases (SCRLM), relative to open surgery. METHODS: Between 1 January 2009 and 20 April 2014, 20 of 25 patients who underwent laparoscopic simultaneous colorectal cancer and SCRLM resections were matched with 20 of 29 patients who underwent an open approach, based on prognostic propensity scores. Perioperative results and survival outcomes were compared...
September 19, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28876143/anti-m%C3%A3-llerian-hormone-levels-before-and-after-uterine-artery-embolization
#8
Bruce McLucas, William D Voorhees, Scott A Snyder
OBJECTIVE: To determine the effects of uterine artery embolization (UAE) on ovarian reserve as measured by Anti-Müllerian hormone (AMH) levels. MATERIAL AND METHODS: Non-randomized, observational study of 89 women 23-40 years of age who received UAE. Control hormone levels were measured prior to UAE and the first post-embolization measurement was taken at various times post-procedure (mean = 190 ± 229 days). RESULTS: Historical work verified by our earlier work has shown that AMH levels decline with age...
September 6, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28853302/novel-approach-of-laparoscopic-and-endoscopic-cooperative-surgery-lecs-for-cholecystectomy
#9
Nobuya Kobayashi, Hirohito Mori, Hideki Kobara, Noriko Nishiyama, Masao Fujiwara, Keiichi Okano, Yasuyuki Suzuki, Tsutomu Masaki
BACKGROUND: Endoscopic submucosal dissection (ESD) techniques, such as generating an artificial space between digestive tract layers for safer dissection, were thought to be safer for the resection of organs in cholecystectomy. We investigated whether combinations of endoscopic techniques and laparoscopic techniques could be performed more safely and rapidly. MATERIAL AND METHODS: Laparoscopic and endoscopic cooperative-cholecystectomy (LEC-chole) and conventional laparoscopic cholecystectomy (Lapa-chole) were performed in six dogs...
August 30, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28817346/performances-on-simulator-and-da-vinci-robot-on-subjects-with-and-without-surgical-background
#10
Andrea Moglia, Vincenzo Ferrari, Franca Melfi, Mauro Ferrari, Franco Mosca, Alfred Cuschieri, Luca Morelli
OBJECTIVE: To assess whether previous training in surgery influences performance on da Vinci Skills Simulator and da Vinci robot. MATERIAL AND METHODS: In this prospective study, thirty-seven participants (11 medical students, 17 residents, and 9 attending surgeons) without previous experience in laparoscopy and robotic surgery performed 26 exercises at da Vinci Skills Simulator. Thirty-five then executed a suture using a da Vinci robot. RESULTS: The overall scores on the exercises at the da Vinci Skills Simulator show a similar performance among the groups with no statistically significant pair-wise differences (p < ...
August 17, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28784008/left-ventricular-thrombectomy-in-myocarditis-the-epicardial-scan-video-assisted-transaortic-approach
#11
Giuseppe Gatti, Stefano Poli, Bernardo Benussi, Rossana Bussani, Annamaria Iorio, Marco Confalonieri, Marco Milo, Irena Tavcar, Aniello Pappalardo, Gianfranco Sinagra
In a 23-year-old man having myocarditis in the context of eosinophilic granulomatosis with polyangiitis, a mobile left ventricular apical thrombus was found with transthoracic echocardiography. Its surgical removal was established because there were no signs of resizing after effective intravascular anticoagulation therapy. Surgery was carried out via a median sternotomy with cardiopulmonary bypass. The site of endocardial implantation of the thrombus was identified with epicardial ultrasonography scan. The trans-aortic approach was adopted to avoid complications such as ventricular dysfunction and arrhythmias secondary to ventricular incision...
August 8, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28635406/concept-design-of-robotic-modules-for-needlescopic-surgery
#12
Shin Sen, Kanako Harada, Zackary Hewitt, Ekawahyu Susilo, Etsuko Kobayashi, Ichiro Sakuma
BACKGROUND: Many minimally invasive surgical procedures and assisting robotic systems have been developed to further minimize the number and size of incisions in the body surface. This paper presents a new idea combining the advantages of modular robotic surgery, single incision laparoscopic surgery and needlescopic surgery. MATERIAL AND METHODS: In the proposed concept, modules carrying therapeutic or diagnostic tools are inserted in the abdominal cavity from the navel as in single incision laparoscopic surgery and assembled to 3-mm needle shafts penetrating the abdominal wall...
August 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28635405/effects-of-microwave-ablation-on-t-cell-subsets-and-cytokines-of-patients-with-hepatocellular-carcinoma
#13
Haiwen Zhang, Xiaowei Hou, Hongjian Cai, Xingjun Zhuang
OBJECTIVES: To investigate the effects of microwave ablation on T-lymphocyte subsets and cytokines in patients with hepatocellular carcinoma. MATERIAL AND METHODS: Peripheral blood was collected from 45 patients with hepatocellular carcinoma treated by microwave ablation before treatment, one week and one month after treatment. T cells (CD3+, CD4+ and CD8+ cells), CD4+ CD25+ Tregs, and CD16+ CD56+ NK cells were analyzed by flow cytometry. Levels of cytokines (IL-2, IFN-γ, TNF-α, IL-12, IL-4, IL-6, IL-8, and IL-10) were determined by a Luminex 200 analyzer...
August 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28635404/safety-and-efficacy-of-hepasphere-50-100%C3%A2-%C3%AE-m-in-the-treatment-of-hepatocellular-carcinoma
#14
Charles Edouard Zurstrassen, Luiz Paulo De Oliveira Gireli, Chiang Jeng Tyng, Almir Galvão Vieira Bitencourt, Marcos Duarte Guimarães, Paula Nicole Vieira Barbosa, Aline Cristine Barbosa Santos Cavalcante, João Paulo Matushita Junior, Mauricio Kauark Amoedo, Felipe Jose Coimbra, Rogério Camargo Pinheiro Alves, Rubens Chojniak
AIM: To evaluate the effects of HepaSphere 50-100 μm (Merit Medical) as a doxorubicin carrier and embolization agent for the treatment of hepatocellular carcinoma (HCC). MATERIAL AND METHODS: A prospective analysis of 18 patients recruited from a national cancer center was conducted. This analysis evaluated the efficacy and safety of HepaSphere, as expressed by the treatment response rate (measured by the modified Response Evaluation Criteria in Solid Tumors, mRECIST) and by the prevalence of treatment-related adverse events, respectively...
August 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28635403/psychomotor-skills-assessment-by-motion-analysis-in-minimally-invasive-surgery-on-an-animal-organ
#15
Erlend Fagertun Hofstad, Cecilie Våpenstad, Lars Eirik Bø, Thomas Langø, Esther Kuhry, Ronald Mårvik
BACKGROUND: A high level of psychomotor skills is required to perform minimally invasive surgery (MIS) safely. To be able to measure these skills is important in the assessment of surgeons, as it enables constructive feedback during training. The aim of this study was to test the validity of an objective and automatic assessment method using motion analysis during a laparoscopic procedure on an animal organ. MATERIAL AND METHODS: Experienced surgeons in laparoscopy (experts) and medical students (novices) performed a cholecystectomy on a porcine liver box model...
August 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28281366/artificial-pneumothorax-a-safe-and-simple-method-to-relieve-pain-during-microwave-ablation-of-subpleural-lung-malignancy
#16
Xiaowei Hou, Xingjun Zhuang, Haiwen Zhang, Kai Wang, Yuanxin Zhang
BACKGROUND: Microwave ablation has been extensively used for eliminating pulmonary tumors; however, it is usually associated with severe pain under local anesthesia. Decreasing the power and shortening the ablation time can help to relieve the pain; however, this leads to incomplete ablation and an increasing recurrence rate. This research aims to employ an artificial pneumothorax to increase both the curative effect and pain relief during the ablation procedure. MATERIAL AND METHODS: From July 2013 to January 2015, nine patients presenting with 10 subpleural lung tumors (age: 44-78 years) with a high possibility of severe pain underwent the artificial pneumothorax during microwave ablation...
August 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28151035/long-term-efficacy-and-safety-of-a-nitinol-closure-clip-system-for-anal-fistula-treatment
#17
Sebastian Dango, Fillimon Antonakis, Dirk Schrader, Arkadiy Radzikhovskiy, Michael B Ghadimi, Rudolf Hesterberg
INTRODUCTION: Treatment failure of anal fistula results in high re-occurrence rate. MATERIAL AND METHODS: Efficacy and safety of a nitinol closure clip system (bear-claw clip) were evaluated for anal fistulae treatment in a 36-month long-term follow-up study. RESULTS: Twenty-two patients were included. No patient had been treated with a bear-claw clip system before. All patients were fully continent before treatment. Follow-up time was 36 months (range 19-48 months)...
August 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28151029/radiofrequency-induced-thermotherapy-rfitt-in-a-porcine-liver-model-and-ex-vivo-great-saphenous-vein
#18
George E Badham, Scott J Dos Santos, Mark S Whiteley
AIMS: To investigate the thermal spread achieved in porcine liver when using an optimised radiofrequency ablation protocol and correlate findings with the effects seen in ex vivo great saphenous vein (GSV), in order to justify clinical use with the new treatment protocol. MATERIAL AND METHODS: Porcine liver and GSV sections were treated with radiofrequency-induced thermotherapy (RFiTT) using the following settings: 20 W at 1 s/cm (linear endovenous energy density; LEED 20 J/cm), 18 W at 1 s/cm (LEED 18 J/cm), 18 W at 3 s/cm (LEED 54 J/cm), 6 W interrupted pull-back 6 s stationary every 0...
August 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28145160/the-thunderbeat-system-for-tissue-dissection-and-vascular-control-in-laparoscopic-splenectomy
#19
Silvia Ceccanti, Ilaria Falconi, Simone Frediani, Alessandro Boscarelli, Marco Catani, Denis A Cozzi
The advent of new energy sources for hemostasis has greatly facilitated advanced laparoscopic procedures. We describe a straightforward technique of laparoscopic splenectomy (LS) accomplished using the THUNDERBEAT™ system (TS) (Olympus Medical Systems Corp., Tokyo, Japan) as the sole means of tissue dissection and hemostasis in two patients aged 19 and 6 years, respectively. The specimens were removed intact via a Pfannenstiel incision. Total operative time was 165 and 150 min, and length of hospital stay was three and 4 d, respectively...
August 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/28145148/preliminary-experimental-study-on-splenic-hemodynamics-of-radiofrequency-ablation-for-the-spleen
#20
Yasutaka Baba, Sadao Hayashi, Kohei Nagasato, Michiyo Higashi, Takashi Yoshiura
PURPOSE: To test the splenic blood flow change after radiofrequency ablation (RFA) of the spleen in a porcine experimental model. MATERIAL AND METHODS: Six pigs underwent RFA of the spleen via laparotomy. During the procedure of RFA, clamping of splenic artery (one) and both splenic artery/vein (one) was also performed. Measurement of blood flow of both splenic artery (SA) and splenic vein (SV) with flow-wire at pre- and post-RFA of the spleen was also performed...
August 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
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