Backgrounds and Objectives: Today we are witnessed a growing number of minimally invasive surgical techniques for different diseases. Laparoscopic colon surgery as a minimally invasive surgery is currently growing in treatment of malignancies after proving his place in the treatment of benign diseases. We compare in this study results of laparoscopic colorectal surgery with open surgery. Method...

Laparoscopically-assisted vaginal hysterectomy (LAVH) was performed in fifteen patients without invasive cancer. Indications for hysterectomy were myomas, abnormal uterine bleeding unresponsive to hormonal treatment and dilatation and curettage, chronic pelvic pain with first degree uterine prolapse and possible adenomyosis, and dysplasia and ovarian cyst in postmenopausal years. No signif...

background deep venous thrombosis (dvt) is a major risk of morbidity and mortality in morbid obese patients underwent bariatric surgery. there are some controversies in different kind of prophylactic strategies for dvt in laparoscopic bariatric surgeries. unfractionated heparin (ufh) is an available and reversible anticoagulant used for dvt prophylaxis. objectives this study aimed to compare cl...

BACKGROUND This study investigates the feasibility of performing advanced minimally invasive surgery (MIS) in a nonspecialized practice environment. METHODS We conducted a cross-sectional survey of all community general surgeons currently practising in Ontario. RESULTS Few community surgeons perform a high volume (> 10 procedures per yr) of advanced MIS. Most (70%) believe it is important t...

We present a computer program for the simulation of Mie scattering in case of arbitrarily large size parameters. The elements of the scattering matrix, efficiency factors as well as the corresponding cross sections, the albedo and the scattering asymmetry parameter are calculated. Single particles as well as particle ensembles consisting of several components and particle size distributions can...

Dust deposition to snow can have regionally important climatic and hydrologic impacts resulting from direct reduction of surface albedo and indirectly from the initiation of snow albedo feedbacks. Modeling the radiative impacts of dust deposited in snow requires knowledge of the optical properties of both components. Here we present an inversion technique to retrieve the effective optical prope...

We present a framework to systematically study the duality properties of scatterers. The duality properties of a scatterer are related to the polarization change that a particle excerpts on a light beam. Our formalism can be applied to any geometry and material, but we develop it in the context of spherical scatterers. Due to their symmetries, we can formulate the problem semi-analytically usin...

BACKGROUND Kinematic design is a predominant phase in the design of robotic manipulators for minimally invasive surgery (MIS). However, an extensive overview of the kinematic design issues for MIS robots is not yet available to both mechanisms and robotics communities. METHODS Hundreds of archival reports and articles on robotic systems for MIS are reviewed and studied. In particular, the kin...

There is experimental evidence that the non-sphericity of certain atmospheric particles can cause scattering properties different from those predicted by standard Mie theory. Numerous studies indicate the need to consider the presence of non-spherical particles in modeling the optical properties of atmospheric aerosols. On the other hand, natural aerosols show a great variety of shapes, making ...