We consider the problem of minimizing daily expected resource usage and overtime costs across multiple parallel resources such as anesthesiologists and operating rooms, which are used to conduct a variety of surgical procedures at large multi-specialty hospitals. To address this problem, we develop a two-stage mixedinteger stochastic dynamic programming model with recourse. The first stage allo...

BACKGROUND AND AIM: This prospective study was aimed to compare efficacy and safety of combined surgery and sequential surgeries in patients with primary glaucoma and visually significant senile cataract. MATERIALS AND METHODS: 50 consecutive patients having coexisting visually significant senile cataract with primary glaucoma were included in study. Patients underwent detailed history, ocular ...

Ying-Qing Wu Abstra t. This paper studies Dehn surgery on a large class of links, called arborescent links. It will be shown that if an arborescent link L is sufficiently complicated, in the sense that it is composed of at least 4 rational tangles T (pi/qi) with all qi > 2, and none of its length 2 tangles are of the form T (1/2q1, 1/2q2), then all complete surgeries on L produce Haken manifold...

CONTEXT Robotic surgery is rapidly evolving and has become an essential part of surgical practice in several parts of the world. Robotic technology will expand globally and most of the surgeons around the world will have access to surgical robots in the future. It is essential that we are updated about the outcomes of robot assisted surgeries which will allow everyone to develop an unbiased opi...

Two Dehn surgeries on a knot are called purely cosmetic, if they yield manifolds that are homeomorphic as oriented manifolds. Suppose there exist purely cosmetic surgeries on a knot in S, we show that the two surgery slopes must be the opposite of each other. One ingredient of our proof is a Dehn surgery formula for correction terms in Heegaard Floer homology.

This paper studies Dehn surgery on a large class of links, called arborescent links. It will be shown that if an arborescent link L is suuciently complicated, in the sense that it is composed of at least 4 rational tangles T (p i =q i) with all q i > 2, and none of its length 2 tangles are of the form T (1=2q 1 ; 1=2q 2), then all complete surgeries on L produce Haken manifolds. The proof needs...

AIM Iatrogenic vascular injuries due to spinal surgeries are rare but serious complications. Surgical management of these injuries is challenging with high morbidity rates. In this study we aim to present the results of endovascular management of iatrogenic vascular injuries due to spinal surgeries. MATERIAL AND METHODS We retrospectively reviewed 11 patients (5 male, 6 female) who had vascul...

BACKGROUND Elbow surgery is shared by several subspecialties. We were curious about the most common elbow surgeries and their corresponding diagnoses in the United States. METHODS We used the National Hospital Discharge Survey (NHDS) and the National Survey of Ambulatory Surgery (NSAS) data gathered in 2006-databases that together provide an estimate of all inpatient and ambulatory surgical c...

OBJECTIVE To apply a new television system, which displays highly sensitive, high-quality 3-dimensional (3-D) images, in performing experimental ophthalmic surgeries. METHODS By combining a high-gain avalanche rushing-amorphous photoconductor (HARP) camera, recently developed in Japan, which has 600 times greater sensitivity than conventional television cameras, and a single-camera, 3-D high-...

OBJECTIVE The Canadian province of British Columbia (BC) is adding financial incentives to increase the volume of surgeries provided by hospitals using a marginal pricing approach. The objective of this study is to calculate marginal costs of surgeries based on assumptions regarding hospitals' availability of labor and equipment. DATA This study is based on observational clinical, administrat...