Results 231 to 240 of about 777,086 (291)

Percutaneous nephrolithotomy: position, position, position!

Urolithiasis, 2017
Percutaneous nephrolithotomy (PCNL) is the regular surgery for treating large or complex renal stones. Since its first inception, many variations have come in the approach including the modifications of patient position. The prone position is traditionally used, and subsequently, variations in prone and supine technique have been proposed and assessed ...
Zhijian, Zhao, Junhong, Fan, Yang, Liu, Jean, de la Rosette, Guohua, Zeng   +4 more
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Restraint Position and Positional Asphyxia

Annals of Emergency Medicine, 1997
To determine whether the "hobble" or "hog-tie" restraint position results in clinically relevant respiratory dysfunction.This was an experimental, crossover, controlled trial at a university-based pulmonary function laboratory involving 15 healthy men ages 18 through 40 years.
T C, Chan, G M, Vilke, T, Neuman, J L, Clausen   +3 more
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Positive Powers of Positive Positive Definite Matrices

Canadian Journal of Mathematics, 1996
AbstractLet C be an n x n positive definite matrix. If C ≥ 0 in the sense that Cij ≥ 0 and if p > n — 2, then Cp ≥ 0. This implies the following "positive minorant property" for the norms ‖A‖p = [tr(A*A)p/2]1/P. Let 2 < p ≠ 4, 6, … . Then 0 ≤ A ≤ B => ‖A‖p ≥ ‖B‖P if and only if n < p/2 + 1.
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A positive positive to negative

Nature Chemistry, 2018
The structure of an antibiotic that is effective against Gram-positive bacteria, but not against Gram-negative bacteria, has now been modified to improve its effectiveness against Gram-negative bacteria. The approach could help broaden the spectrum of activity of other antibiotics.
Jed F, Fisher, Shahriar, Mobashery
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Positive Statements, Positive Students, Positive Classrooms

Australian Journal of Guidance and Counselling, 2003
This paper describes the influential role that positive statements made by teachers has on upper primary school students' mental health as measured by their self-perceptions and their satisfaction with their classroom environment. The notion forwarded is that positive statements, when delivered by teachers under specific conditions, have a positive ...
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Surgical Positioning

Orthopaedic Nursing, 1998
Surgical positioning is a very important aspect of caring for the patient intraoperatively. All surgical team members must work together to safely move and secure the patient to adequately expose the surgical site. The type of surgical position, anesthesia used and the patient's health status continue to be factors which contribute to optimizing the ...
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Prone Position

Current Opinion in Critical Care, 2014
Prone position can prevent ventilator-induced lung injury in acute respiratory distress syndrome (ARDS) patients receiving conventional mechanical ventilation and, hence, may have the potential to improve survival from this basis. Even though no single randomized controlled trial has proven benefit on patient outcome until recently, two meta-analyses ...
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POSITIONAL NYSTAGMUS

Otolaryngology–Head and Neck Surgery, 1975
Positional nystagmus may be persistent or transitory. Of the persistent forms, type I refers to nystagmus changing direction in different head positions and type II to nystagmus beating in a single direction. Both types may denote either peripheral or central abnormality.
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