Novel Instant Vacuum Biopsy Needle System

2013 ◽  
Author(s):  
Andrew Barnett ◽  
Patrick W. McLaughlin ◽  
Haojun Zheng ◽  
Jason Z. Moore
Keyword(s):  
Needle Biopsy ◽  
Needle Insertion ◽  
High Rate ◽  
Cutting Efficiency ◽  
Biopsy Needle ◽  
Insertion Device ◽  
Vacuum Biopsy ◽  
Biopsy Methods ◽  
Rate Of Failure ◽  
Pneumatic Cylinders

This paper explores the benefits of vacuum assistance to 18 gauge needle biopsy. Current biopsy methods are inefficient or have a high rate of failure, causing the need for further painful insertions. A novel needle insertion device was developed to create the vacuum in the needle. Using multiple pneumatic cylinders, a vacuum is created inside the end-cut needle by retracting the trocar while inserting the needle. Calculations were done to determine the force caused by the vacuum. Experiments inserting the needle into porcine kidney have shown that the vacuum assistance increases cutting efficiency.

scholarly journals Causes of Failure of University Students in Computer Programming Courses : The Case of Wachemo University

2019 ◽  
pp. 123-132 ◽  
Author(s):  
Wubetu Barud Demilie
Keyword(s):  
Teaching And Learning ◽  
Computer Programming ◽  
High Rate ◽  
Teaching Methodology ◽  
Learning Methods ◽  
Learner Perspective ◽  
Rate Of Failure ◽  
Science Departments ◽  
Programming Courses ◽  
Causes Of Failure

Computer programming courses are among the important components of the curriculum to be studied, not only in the school of Computing and Informatics, but also in most of the field including Natural Sciences, Mathematics, and Engineering Science departments. In this research, a study was conducted to investigate and explore the views of students for the failure and difficulties they faced in learning fundamental programming courses. There are many factors that influence the high rate of failure of students in computer programming courses. This paper focuses on the teaching and learning methodologies and strategies that are implemented in teaching of programming courses. This is a major factor for consideration; hence an investigation into the causes of failure of students in computer programming courses from the learner perspective with regard to the teaching methodology used by teachers to teach these courses is relevant and very important concept. Computer programming courses form part of the core concentration areas for students especially studying in school of computing and informatics as an undergraduate degree program. Computer programming students are expected to prove capabilities in the principles of programming and logic that are being taught in the course; even though some of these concepts are highly intellectual and multifaceted. Their opinions to the usefulness of the teaching methods being implemented in computer programming courses were required for. The needs and concerns about the teaching and learning methods are highlighted in the survey and discussed thereby leading to the making of suggestions about the ways to improve the teaching and learning methods that are used in computer programming courses in order to advance understanding of computer programming, when studied by students thereby minimizing failure rates of those students.

scholarly journals A Robotized Needle Insertion Device for Percutaneous Procedures

2005 ◽  
Author(s):  
Olivier Piccin ◽  
Pierre Renaud ◽  
Laurent Barbe´ ◽  
Bernard Bayle ◽  
Benjamin Maurin ◽  
...  
Keyword(s):  
Ct Scan ◽  
Medical Application ◽  
Needle Insertion ◽  
Computer Assisted ◽  
The Novel ◽  
Percutaneous Therapy ◽  
Percutaneous Procedures ◽  
Insertion Device ◽  
Haptic Control ◽  
Novel Design

In this paper, a new robotized needle insertion device is proposed for computer-assisted percutaneous therapy. The insertion device is integrated in a robotic system dedicated to gesture guidance in a Computed Tomography (CT) scan. The presented design fulfills the stringent requirements of such a medical application: compatibility with a CT-scan and haptic control by the practitioner are ensured as well as safety and sterilization. The novel design of the insertion device is first presented, outlining its main properties, before introducing preliminary experimental results.

Critical Strategies for Information Systems Development Projects

2011 ◽  
pp. 179-189
Author(s):  
Chung Kim ◽  
Dane Peterson ◽  
Jerry Chin ◽  
Tonya Barrier
Keyword(s):  
Information Systems ◽  
International Markets ◽  
High Rate ◽  
Cultural Norms ◽  
Development Projects ◽  
National Boundaries ◽  
Rate Of Failure ◽  
Diverse Cultures ◽  
Is Failure ◽  
Is Projects

Despite enormous progress in the methodologies and technologies used in the development and implementation of Information Systems (IS), IS failure continues to plague the efforts of many companies. According to a recent report, up to 90 percent of all IS projects fail to achieve their goals, 80 percent are late and over-budget, and 40 percent are abandoned (Clegg et al., 1997). Since information systems are becoming increasing critical for the strategic operations of organizations, the high rate of failure for IS projects is of great concern to both organizational management and IS professionals. Developing and implementing successful international IS have proven to be even more difficult due to such factors as the diversity and disagreement among the participants (Mantelaers & Van Den Berg, 2000). However, with an increasing number of firms expanding into international markets, the need to develop and implement IS which cross national boundaries and span diverse cultures is rapidly growing (Palvia, 1998). Adding to the importance of developing successful international IS is the realization that they constitute an essential tool for assisting organizations in coping with the increased competition associated with global markets. Thus, there is an urgent need to acquire knowledge about whether the factors found to be critical for developing successful IS in one country are also applicable to developing international IS involving countries with different cultural norms.

Does Washing the Biopsy Needle with Povidone-Iodine Have an Effect on Infection Rates after Transrectal Prostate Needle Biopsy?

2010 ◽  
Vol 85 (2) ◽  
pp. 147-151 ◽  
Author(s):  
Gokhan Koc ◽  
Sitki Un ◽  
Devrim Nihat Filiz ◽  
Kaan Akbay ◽  
Yuksel Yilmaz
Keyword(s):  
Needle Biopsy ◽  
Povidone Iodine ◽  
Infection Rates ◽  
Biopsy Needle ◽  
Prostate Needle Biopsy

scholarly journals High Rate of Failure in Treatment of Imported Schistosomiasis

2010 ◽  
Vol 17 (2) ◽  
pp. 94-99 ◽  
Author(s):  
Marie Helleberg ◽  
Sören Thybo
Keyword(s):  
High Rate ◽  
Rate Of Failure

Rituximab (R) + Hypercvad Alternating with R-Methotrexate/Cytarabine after 9 Years: Continued High Rate of Failure-Free Survival in Untreated Mantle Cell Lymphoma (MCL)

Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 833-833 ◽  
Author(s):  
Jorge Romaguera ◽  
Luis Fayad ◽  
Alma Rodriguez ◽  
Fb Hagemeister ◽  
Barbara Pro ◽  
...  
Keyword(s):  
Overall Survival ◽  
Complete Response ◽  
Serum Lactate ◽  
High Rate ◽  
Serum Lactate Dehydrogenase ◽  
High Dose ◽  
Free Survival ◽  
Mantle Cell ◽  
Rate Of Failure

Abstract MCL has a poor outcome with current non-intense therapies. We present an update of our results utilizing an intense chemotherapy regimen comprising fractionated cyclophosphamide, doxorubicin, vincristine and dexamethasone to which rituximab has been added (R-HyperCVAD, one cycle), alternating with rituximab and high dose methotrexate/cytarabine (R-MA, one cycle) for a total of 6–8 cycles (J Clin Oncol 2006 Feb 1;24(4):724). Treatment was started at most within 2 months from the initial evaluation. Overall survival (OS) was defined as the time from start of treatment until recurrence or death from any cause. Failure-free survival (FFS) was defined as the time from start of treatment until recurrence or death from toxicity or death from treatment-related malignancy. Of 97 consecutive evaluable patients, 87% achieved a complete response (CR) or unconfirmed CR after 6 cycles and did not receive additional therapy. With a median follow up on 84 months (7 years), the overall survival and failure-free survival at 7 years was 60% and 43%, respectively. Among patients 65 years of age or younger, the 7-year OS and FFS was 68% and 52%, respectively. Important prognostic variables included age (65 yrs or less vs > 65 yrs; initial serum B2 microglobulin 3 or less mg/dL vs > 3); and initial serum lactate dehydrogenase (normal vs > normal). Further subset analysis will be presented at the meeting. Figure Figure

Sign in / Sign up

Export Citation Format

Share Document