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Minimally Invasive Therapy & Allied Technologies: MITAT

Doyoung Chang, Xue Chong, Chunwoo Kim, Changhan Jun, Doru Petrisor, Misop Han, Dan Stoianovici
OBJECTIVE: The common sextant prostate biopsy schema lacks a three-dimensional (3D) geometric definition. The study objective was to determine the influence of the geometric distribution of the cores on the detection probability of prostate cancer (PCa). METHODS: The detection probability of significant (>0.5cm(3)) and insignificant (<0.2cm(3)) tumors was quantified based on a novel 3D capsule model of the biopsy sample. The geometric distribution of the cores was optimized to maximize the probability of detecting significant cancer for various prostate sizes (20 to 100cm(3)), number of biopsy cores (6 to 40 cores) and biopsy core lengths (14 to 40mm) for transrectal and transperineal biopsies...
October 19, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Toshihiro Iguchi, Takao Hiraki, Hideo Gobara, Hiroyasu Fujiwara, Jun Sakurai, Yusuke Matsui, Motoo Araki, Yasutomo Nasu, Susumu Kanazawa
PURPOSE: To retrospectively evaluate the safety and diagnostic yield of needle biopsy of small renal tumors, and the clinical consequences of performing needle biopsy in patients referred for percutaneous cryoablation before their treatment. MATERIAL AND METHODS: Biopsy was performed for 120 tumors (mean diameter, 2.2 cm) in 119 patients. All procedures were divided into diagnostic and non-diagnostic biopsies. Various variables were compared between the two groups...
October 18, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Xue-Lian Li, Dan-Feng Du, Hua Jiang
The comparison of robotic and conventional laparoscopic hysterectomy and pelvic lymphadenectomy in gynecologic cancer still needs to be studied. In all, 98 consecutive cases of patients with gynecologic cancer undergoing robot-assisted hysterectomy and pelvic lymphadenectomy, and another 98 consecutive cases of conventional laparoscopic hysterectomy and pelvic lymphadenectomy during the same period in the Obstetrics and Gynecology Hospital of Fudan University were included. The duration of the operation, blood loss, drainage during the first 24 h after the operation, total hospital stay, hospital stay after the operation, lymph nodes collected, perioperative complications, and the cost of each operation for both procedures were recorded...
September 26, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Yang Yu, Guantao Lou, Chen Shen, Sheng Guan, Wei Wang, Bo Yang
: TUERP, which is based on TURP, technically has been proven to be safe and effective with reduced complication rates. Due to the lack of systematic pre-clinical training, the surgery is learnt only inside the operative theatre in the majority of the Chinese medical centers. It is also known to have a steep learning curve, and very few articles have addressed the technical aspects of TUERP. MATERIAL AND METHODS: The videos of 91 cases of bipolar transurethral enucleation and resection of the prostate, which were performed by one urological surgeon in our department from August 2013 to January 2016, were retrospectively analyzed...
September 23, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Gilberto Melnick, Enio Eduardo Guerios, Guilherme Agreli
Transcatheter aortic valve implantation (TAVI) is a relatively new medical intervention. Research on dedicated TAVI devices is an exciting and dynamic field to be explored by professionals involved in technological innovation. The authors describe in this article the first engineering concept and part of the US Patent of a new valve prosthesis. Divided into two pieces to be separately implanted using a single catheter by means of an innovative technique, this device aims at reducing prosthesis and delivery catheter profile...
September 23, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Geping Yin, Juan Li, Aifang Wu, Jing Liang, Zheng Yuan
PURPOSE: To compare the effectiveness and safety of loop electrosurgical excision procedures (LEEP) with four different excisions in treating cervical intraepithelial neoplasia (CIN) of different areas. METHODS: Four hundred and sixty-six cases of CIN were treated with different types of LEEP. Following visual inspection with acetic acid and Lugol's iodine, LEEP were performed to excise the transformation zone to a 20-25 mm depth with a 2-3 mm margin. Four categories of procedures are described below: 1) LEEP-A for lesion ≥ 2/3 of cervical area: conization of ≥ 2/3 of cervical tissue...
September 21, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Margherita Brancadoro, Selene Tognarelli, Gastone Ciuti, Arianna Menciassi
INTRODUCTION: The purpose of this work is to design and validate an innovative magnetic-based device for tissue retraction for minimally invasive surgery. MATERIAL AND METHODS: An intra-abdominal magnetic module is coupled with an extracorporeal system for establishing a stable attraction and consequently a reliable tissue retraction. Once the retractor has been inserted into the abdomen, tissue retraction is not constrained by a fixed access port, thus guaranteeing a more flexible, safer and less invasive operation...
September 12, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Somsharan Betgeri, S Rajesh, Ankur Arora, Dipanjan Panda, Ajeet Singh Bhadoria, Amar Mukund
The aim of this report is to discuss the results of percutaneous endobiliary radiofrequency ablation (RFA) combined with balloon-sweep technique in restoring the patency of occluded self-expandable metallic stents (SEMS) secondary to tumor infiltration. A total of eight patients underwent endobiliary RFA for reopening of occluded SEMS at our institute. Post RFA, all patients showed restoration of stent patency. After a median follow-up of 6.5 months, four patients had succumbed to the underlying disease at three, four, six, and seven months...
September 9, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Tao Xia, Jia-Yu Zhou, Yi-Ping Mou, Xiao-Wu Xu, Yu-Cheng Zhou, Chao-Jie Huang, Ren-Chao Zhang, Chao Lu, Rong-Gao Chen, Yun-Yun Xu
Celiac trunk aneurysms (CTAs) are rare and usually asymptomatic. Although most of these aneurysms can be treated with percutaneous embolization, some uncommon locations of the aneurysm may make this approach impossible. We report a patient with a celiac trunk aneurysm (CTA) and a proximal splenic artery aneurysm (SAA). Due to the size and location of these two aneurysms, after multidisciplinary discussion, endovascular management was considered inappropriate and they were treated by laparoscopic ligation of the two aneurysms and revascularization...
September 6, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Ki Hyung Kim, Yoon Hwa Kim, Ka Yeong Yun, Si Eun Han, Eun Soo Kim, Byung Su Kwon, Dong Soo Suh
OBJECTIVE: To evaluate the feasibility and safety of laparoscopically assisted surgery for benign ovarian tumors via a single suprapubic incision under epidural anesthesia. METHODS: Forty-three patients underwent laparoscopically assisted surgery via a single suprapubic incision under epidural anesthesia. Types of surgery were classified as follows: type I - suprapubic incision surgery without laparoscopic support, type II - suprapubic incision surgery with laparoscopic support but without CO2 inflation; and type III - suprapubic incision surgery with laparoscopic support and CO2 inflation...
August 30, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Fabiola Fernández-Gutiérrez, Malgorzata Wolska-Krawczyk, Arno Buecker, J Graeme Houston, Andreas Melzer
This study presents a framework for workflow optimisation of multimodal image-guided procedures (MIGP) based on discrete event simulation (DES). A case of a combined X-Ray and magnetic resonance image-guided transarterial chemoembolisation (TACE) is presented to illustrate the application of this method. We used a ranking and selection optimisation algorithm to measure the performance of a number of proposed alternatives to improve a current scenario. A DES model was implemented with detail data collected from 59 TACE procedures and durations of magnetic resonance imaging (MRI) diagnostic procedures usually performed in a common MRI suite...
August 26, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Yunyong Shi, Li Lin, Chaozheng Zhou, Ming Zhu, Le Xie, Gang Chai
BACKGROUND: Mandible plastic surgery plays an important role in conventional plastic surgery. However, its success depends on the experience of the surgeons. In order to improve the effectiveness of the surgery and release the burden of surgeons, a mandible plastic surgery assisting robot, based on an augmented reality technique, was developed. MATERIAL AND METHODS: Augmented reality assists surgeons to realize positioning. Fuzzy control theory was used for the control of the motor...
August 26, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Shinichi Murata, Yozo Sato, Yoshitaka Inaba, Hidekazu Yamaura, Mina Kato, Hiroshi Kawada, Takaaki Hasegawa, Tsubasa Asai, Takeshi Aramaki
A 65-year-old man with hepatocellular carcinoma (HCC) due to alcohol-related liver cirrhosis had undergone transarterial chemoembolization 11 times. However, treatment for HCC was difficult to continue, due to episodic hepatic encephalopathy. He was referred to our hospital for treatment of hepatic encephalopathy, showing a Child-Pugh score of 8 despite medical therapy. Abdominal computed tomography revealed intrahepatic portosystemic venous shunt comprising two shunt tracts from the right posterior portal vein to the inferior vena cava via the right adrenal vein...
August 19, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Peter Isfort, Tobias Penzkofer, Christoph Wilkmann, Hong-Sik Na, Christian Kotzlowski, Nobutake Ito, Joachim Georg Pfeffer, Stefan Bisplinghoff, Sabine Osterhues, Andreas Besting, Jorge Gooding, Thomas Schmitz-Rode, Christiane Kuhl, Andreas Horst Mahnken, Philipp Bruners
OBJECTIVES: To develop an electromagnetic navigation technology for transjugular intrahepatic portosystemic shunt (TIPS) creation and translate it from phantom to an in-vivo large animal setting. MATERIAL AND METHODS: A custom-designed device for TIPS creation consisting of a stylet within a 5 French catheter as well as a software prototype were developed that allow real-time tip tracking of both stylet and catheter using an electromagnetic tracking system. Feasibility of navigated TIPSS creation was tested in a phantom by two interventional radiologists (A/B) followed by in-vivo testing evaluation in eight domestic pigs...
August 9, 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Fei Xue, Jianpeng Li, Jianwen Lu, Haoyang Zhu, Wenyan Liu, Hongke Zhang, Huan Yang, Hongchang Guo, Yi Lv
INTRODUCTION: The concept of magnetic compression technique (MCT) has been accepted by surgeons to solve a variety of surgical problems. In this study, we attempted to explore the feasibility of a splenorenal shunt using MCT in canine and cadaver. MATERIAL AND METHODS: The diameters of the splenic vein (SV), the left renal vein (LRV), and the vertical interval between them, were measured in computer tomography (CT) images obtained from 30 patients with portal hypertension and in 20 adult cadavers...
December 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Wenxiao Jiang, Zhaojun Shen, Hui Luo, Xiaoli Hu, Xueqiong Zhu
OBJECTIVE: Use systematic reviews and meta-analyses to assess the effect of polyvinyl alcohol and tris-acryl gelatin microsphere materials in leiomyoma embolization for symptomatic leiomyomas. MATERIAL AND METHODS: We included randomised controlled studies published before January 2015 comparing polyvinyl alcohol and tris-acryl gelatin microsphere materials in uterine leiomyoma embolization for women with symptomatic leiomyomas. The main outcome measures included change of overall quality of life, change of overall symptom severity, changes of uterine and leiomyoma volumes, leiomyoma infarction rate, treatment failure and complications...
December 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Joep Knol, Sami A Chadi
Standardization of transanal total mesorectal excision requires the delineation of the principal procedural components before implementation in practice. This technique is a bottom-up approach to a proctectomy with the goal of a complete mesorectal excision for optimal outcomes of oncologic treatment. A detailed stepwise description of the approach with technical pearls is provided to optimize one's understanding of this technique and contribute to reducing the inherent risk of beginning a new procedure. Surgeons should be trained according to standardized pathways including online preparation, observational or hands-on courses as well as the potential for proctorship of early cases experiences...
October 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Marco Maria Lirici, Cristiano G S Hüscher
History of rectal cancer surgery has shown a continuous evolution of techniques and technologies over the years, with the aim of improving both oncological outcomes and patient's quality of life. Progress in rectal cancer surgery depended on a better comprehension of the disease and its behavior, and also, it was strictly linked to advances in technologies and amazing surgical intuitions by some surgeons who pioneered in rectal surgery, and this marked a breakthrough in the surgical treatment of rectal cancer...
October 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Marco Maria Lirici, Cristiano G S Hüscher, Eiji Kanehira
No abstract text is available yet for this article.
October 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
Cristiano G S Hüscher, Simone Maria Tierno, Valentina Romeo, Marco Maria Lirici
INTRODUCTION: First described in 1982, TME overcomes most of the concerns regarding adequate local control after anterior rectal resection. TME requires close sharp dissection along the so-called Heald's plane down to the levators, with distal dissection often cumbersome. In recent years, Transanal TME was introduced with the aim to improve distal rectal dissection and quality of mesorectal excision. MATERIAL AND METHODS: A prospective, non-randomized study, started in 2013, is currently ongoing in two Italian Centers...
October 2016: Minimally Invasive Therapy & Allied Technologies: MITAT
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