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Minimally Invasive Therapy & Allied Technologies: MITAT

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https://www.readbyqxmd.com/read/29343145/principles-of-focused-ultrasound-and-mr-guided-focused-ultrasound-for-liver
#1
Senay Mihcin, Andreas Melzer
Focused ultrasound (FUS/HIFU) relies on ablation of pathological tissues by delivering a sufficiently high level of acoustic energy in situ of the human body. Magnetic Resonance guided FUS (MRgFUS/HIFU) and Ultrasound guided (USgFUS/HIFU) are image guided techniques combined with therapeutic FUS for monitoring purposes. The principles and technologies of FUS/HiFU are described in this paper including the basics of MR guidance techniques and MR temperature mapping. Clinical applications of FUS/HIFU gained CE and FDA approvals for the treatment of various benign and few malignant lesions in the last two decades...
January 18, 2018: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29278340/microwave-ablation-of-pancreatic-tumors
#2
Thomas J Vogl, Bita Panahi, Moritz H Albrecht, Nagy Naguib Naeem Naguib, Nour-Eldin A Nour-Eldin, Tatjana Gruber-Rouh, Zachary M Thompson, Lajos M Basten
OBJECTIVES: To evaluate the clinical performance of percutaneous microwave ablation (MWA) for treatment of locally-advanced-pancreatic-cancer (LAPC). MATERIAL AND METHODS: Twenty-two MWA sessions (August 2015-March 2017) in 20 patients with primary pancreatic cancer (13 men, 7 women, mean-age: 59.9 ± 8.6 years, range: 46-73 years), who had given informed consent, were retrospectively evaluated. All procedures were performed percutaneously under CT-guidance using the same high-frequency (2...
December 26, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29275666/do-we-need-a-special-issue-about-cutting-edges
#3
Terumitsu Hasebe, Joachim Kettenbach
No abstract text is available yet for this article.
December 23, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29271289/insertion-mechanics-of-bioinspired-needles-into-soft-tissues
#4
Mohammad Sahlabadi, Seyedvahid Khodaei, Kyle Jezler, Parsaoran Hutapea
INTRODUCTION: Most studies to date confirm that any increase in the needle insertion force increases the damage to the tissue. When it comes to brain tissue, even minor damage can cause a long-lasting traumatic brain injury. Thus there is a great demand for innovative minimally invasive needles among the medical community. In our previous studies a novel bioinspired needle design with specially designed barbs was used to perform insertion tests into Polyvinyl chloride (PVC) tissue-mimicking gels, in which it decreased the insertion force by as much as 25%...
December 22, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29237317/a-new-embolic-liquid-agent-comprised-of-amino-acid
#5
Yasutaka Baba, Michiyo Higashi, Kazuo Awai
Transcatheter arterial or venous embolization has been widely used to address solid tumors by occluding the tumor-feeding vessels. It is also performed to treat portosystemic shunts and to stop bleeding by repair of the site of trauma. Commonly used embolic materials are gelatin sponges, coils, beads, and liquid agents such as absolute ethanol, histoacyryl, and onyx. In the field of interventional radiology, embolotherapy is performed routinely. Liquid embolization agents have different characteristics. Their coagulation time, the inflammatory reaction of the vascular wall or surrounding tissue, and their adhesion to the vascular wall vary...
December 13, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29233059/a-new-manometry-device-for-evaluating-the-sphincter-of-oddi-using-a-fiber-optic-pressure-sensor
#6
Takashi Hanzawa, Tadao Matsunaga, Tomoyuki Koike, Atsushi Kanno, Atsushi Masamune, Katsunori Iijima, Tooru Shimosegawa, Yoichi Haga
INTRODUCTION: Although measuring the pressure of the sphincter of Oddi and the bile duct is considered to be an important examination, called Sphincter of Oddi manometry (SOM), some complications related to the SOM device remain unsolved. MATERIAL AND METHODS: To decrease adverse complications, we developed a 0.46 mm manometry and we performed some in vitro studies. RESULTS: We successfully developed a 0.46 mm SOM. The diameter is the thinnest size used in endoscopic examinations...
December 12, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29231067/in-vitro-artifact-assessment-of-an-mr-compatible-microwave-antenna-device-for-percutaneous-tumor-ablation-with-fluoroscopic-mri-sequences
#7
David-Emanuel Kessler, Jakob Weiss, Hansjörg Rempp, Philippe L Pereira, Konstantin Nikolaou, Stephan Clasen, Rüdiger Hoffmann
OBJECTIVE: To evaluate artifact configuration and diameters of a magnetic resonance (MR) compatible microwave (MW) applicator using near-realtime MR-fluoroscopic sequences for percutaneous tumor ablation procedures. MATERIAL AND METHODS: Two MW applicators (14 G and 16 G) were tested in an ex-vivo phantom at 1.5 T with two 3 D fluoroscopic sequences: T1-weighted spoiled Gradient Echo (GRE) and T1/T2-weighted Steady State Free Precession (SSFP) sequence. Applicator orientation to main magnetic field (B0), slice orientation and phase encoding direction (PED) were systematically varied...
December 12, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29214888/minimally-invasive-surgical-approach-for-radicalization-of-incidental-post-cholecystectomy-gallbladder-carcinoma-safety-feasibility-and-outcomes
#8
Emanuele Sinagra, Stefano Garritano, Salvatore Marco Iacopinelli, Marco Messina, Dario Raimondo, Francesca Rossi, Massimiliano Spada, Guido Martorana, Marcello Giuseppe Spampinato
BACKGROUND AND AIMS: Gallbladder carcinoma is a rare but aggressive malignant neoplasm. The incidence of intra- or post-operative incidental gallbladder carcinoma diagnosis following laparoscopic cholecystectomy is estimated to be 1-2%. Aggressive re-resection is warranted as the majority of patients have residual disease either in the liver or the lymph nodes. However the use of a minimally invasive surgical approach (MISA) to perform a radicalization in these patients has not been investigated yet...
December 7, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29179633/a-concept-for-electromagnetic-navigated-targeting-of-liver-tumors-using-an-angiographic-approach
#9
Marius Schwalbe, Tom Williamson, Iwan Paolucci, Torsten Fuss, Iris Baumgartner, Daniel Candinas, Stefan Weber, Pascale Tinguely
BACKGROUND: The benefits of using navigation technology for percutaneous local ablation of selected hepatocellular carcinoma (HCC) have been shown. Due to additional efforts in the procedural workflow, barriers to introducing navigation systems on a broad clinical level remain high. In this work, initial steps toward a novel concept for simple and precise targeting of HCC are evaluated. MATERIAL AND METHODS: The proposed technique is based on an angiographic approach using an intrahepatic electromagnetic (EM) reference, for consecutive percutaneous navigated positioning of ablation probes...
November 27, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29179632/prediction-of-the-ablated-area-prior-to-radiofrequency-ablation-for-liver-tumor-under-ct-guidance
#10
Rika Yoshimatsu, Akinori Doi, Tomoaki Yamanishi, Miki Nishimori, Kenta Ogi, Kenji Kajiwara, Taiji Tamura, Hiroki Minamiguchi, Takuji Yamagami
PURPOSE: To evaluate the usefulness of a method we developed to predict the ablation area at the time of CT guided radiofrequency (RF) ablation for liver tumors on a CT workstation. MATERIAL AND METHODS: Ten tumors (mean diameter 15.5 mm, range, 9.0-21.5 mm) in seven patients with hepatocellular carcinoma for which CT guided RF ablation was performed were subjects of this study. After advancing the electrode, plain CT was obtained. Then a simulated ball to predict the ablated area was created on the workstation...
November 27, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29179628/pregnancy-after-uterine-artery-embolization-using-gelfoam%C3%A2
#11
Katherine Jane C Chua, Bruce McLucas
We present a case study of a patient who underwent uterine artery embolization (UAE) using Gelfoam™ (Pfizer, New York, NY, USA) and had a subsequent pregnancy. Our patient, a 38-year-old female (4 Gravida/2 Para), underwent UAE for treatment of symptomatic myoma in September 2005. At the patient's seven-month post procedure visit, she experienced a 43.9% volume reduction in uterine size and 74.5% reduction in volume of the largest fibroid and relief of bulk symptoms and menorrhagia. The patient had a term delivery of healthy twin infants 15 months post embolization...
November 27, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29168421/pet-ct-guided-interventions-indications-advantages-disadvantages-and-the-state-of-the-art
#12
Roberto Luigi Cazzato, Julien Garnon, Behnam Shaygi, Guillaume Koch, Georgia Tsoumakidou, Jean Caudrelier, Pietro Addeo, Philippe Bachellier, Izzie Jacques Namer, Afshin Gangi
Positron emission tomography/computed tomography (PET/CT) represents an emerging imaging guidance modality that has been applied to successfully guide percutaneous procedures such as biopsies and tumour ablations. The aim of the present narrative review is to report the indications, advantages and disadvantages of PET/CT-guided procedures in the field of interventional oncology and to briefly describe the experience gained with this new emerging technique while performing biopsies and tumor ablations.
November 23, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29168415/clinically-intractable-chronic-unilateral-hematuria-successful-treatment-with-renal-segmental-artery-embolization
#13
Jae Chun Park, Gyoo-Sik Jung, Jin Ho Lee, Joong Kyung Kim
Chronic unilateral hematuria (CUH) is characterized by intermittent or continuous gross hematuria that cannot be diagnosed using standard radiology and hematology. The authors report a case of CUH with no discrete lesion at ureteroscopy, successfully treated by selective renal artery embolization. Renal artery embolization could be a treatment option for selected patients with clinically intractable CUH.
November 23, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29168402/liquid-metal-bath-as-conformable-soft-electrodes-for-target-tissue-ablation-in-radio-frequency-ablation-therapy
#14
Xuyang Sun, Zhi-Zhu He, Zhong-Shan Deng, Yi-Xin Zhou, Jing Liu
BACKGROUND: Radio-frequency ablation has been an important physical method for tumor hyperthermia therapy. The conventional rigid electrode boards are often uncomfortable and inconvenient for performing surgery on irregular tumors, especially for those tumors near the joints, such as ankles, knee-joints or other facets like finger joints. MATERIAL AND METHODS: We proposed and demonstrated a highly conformable tumor ablation strategy through introducing liquid metal bath as conformable soft electrodes...
November 23, 2017: Minimally Invasive Therapy & Allied Technologies: MITAT
https://www.readbyqxmd.com/read/29141515/mri-powered-biomedical-devices
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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