نتایج جستجو برای: burr distribution

تعداد نتایج: 610474  

2016
Dae-in Kim Jae-hoon Kim Hee-in Kang Byung-gwan Moon Joo-seung Kim Deok-ryeong Kim

OBJECTIVE Although subdural hematoma (SDH) is commonly treatable by burr hole surgery in the late subacute or chronic stage, there is no clear consensus regarding appropriate management and exact predictive factors for postoperative recurrence also remain unclear. The aim of this study was to evaluate risk factors associated with recurrence of SDH that requires burr hole surgery in the late sub...

2007
P. Stringer

One of the most significant problems encountered in machining, particularly in drilling, is that of burr formation. Burrs usually comprise of work piece material which has been plastically deformed during the machining process and projects beyond the desired edge of the work piece. The adverse effects of burrs depend on the component application but may include; stress concentration and related...

Journal: :World neurosurgery 2016
Joanna Gernsback John Paul George Kolcun Jonathan Jagid

BACKGROUND Chronic subdural hematoma (cSDH) is a common neurosurgical condition, with an estimated incidence of 3-15.5 per 100,000 people, with significantly higher rates in the elderly population. Recurrence rates range from 2%-37% after surgical drainage. Studies have shown that leaving a drain postoperatively can reduce recurrence rates, but studies have not looked at whether there is a diff...

Journal: :Pakistan Journal of Statistics and Operation Research 2022

A new family of distributions called Gamma Odd Burr X-G (GOBX-G) distribution is introduced in this paper. Its structural properties such as the density expansion, quantile function, moments and generating functions, incomplete moments, probability weighted R´enyi entropy order statistics were derived. Maximum likelihood technique used to estimate parameter model simulation results are provide...

Journal: :AJNR. American journal of neuroradiology 1984
D R Enzmann K M Irwin W H Marshall G D Silverberg R H Britt J W Hanbery

Sonographic imaging of the brain was accomplished through a burr hole using a small, real-time, 5 MHz transducer in five patients. Brain tumors were accurately imaged, corresponding closely in morphology to the computed tomographic scan. Intraoperative sonography through a burr hole allows flexibility in technique and greatly facilitates brain biopsy procedures.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم و فنون مازندران 0

مدل روزنه های موازی موج دار (corrugated oarallel bundle model) برای تعریف اثر ساختمان روزنه ها در نفوذ-واکنش (diffusion and reaction) در کاتالیستهای متخلخل بکار می رود. در مدل روزنه های موج دار، از یک دسته روزنه های اصلی (pore) استفاده شده است . هر یک از این روزنه های اصلی دارای یکسری عناصر روزنه می باشد که هر عنصر دارای یک شعاع تعیین شده به صورت اتفاقی از یک توزیع اندازه روزنه ها (pore size di...

Journal: :International Journal of Computational and Theoretical Statistics 2017

2014
Dong Hwan Kim Hwan Soo Kim Hyuk Jin Choi In Ho Han Won Ho Cho Kyoung Hyup Nam

OBJECTIVE Although standard method has not been established for the chronic subdural hematoma (CSDH), burr-hole trephination and closed system drainage with or without irrigation has been widely accepted as the treatment of choice. The aim of this study is to analysis the post-operative recurrence rates after burr-hole trephination of the CSDH according to the conduction of irrigation. METHOD...

2015
Jacqueline M. Regan Emmagene Worley Christopher Shelburne Ranjit Pullarkat Joseph C. Watson

Chronic subdural hematomas (CSDH), which are frequently encountered in neurosurgical practice, are, in the majority of cases, ideally treated with surgical drainage. Despite this common practice, there is still controversy surrounding the best surgical procedure. With lack of clear evidence of a superior technique, surgeons are free to base the decision on other factors that are not related to ...

Journal: :Acta medica Iranica 2015
Seyed Amir Hossein Javadi Fereshteh Naderi Amir Mohammad Javadi

Chronic subdural hematoma (CSDH) is a curable entity frequently encountered by neurosurgeons. The present study was conducted to explore expert opinion and common practice in Iran. Besides, a Review of randomized clinical trials in literature was performed. A questionnaire including six questions discussing major aspects of practice on CSDH, with multiple choices was designed. A pilot study was...

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