BACKGROUND Off-line calculation of the pulse pressure variation (PPV(ref)) has repeatedly been shown to be a reliable predictor of fluid responsiveness in mechanically ventilated patients. This study was designed to assess the ability of two algorithms for automated calculation of PPV (PPV(auto)) (Intellivue MP 70) and stroke volume variation (SVV(auto)) (FloTrac/Vigileo) to predict fluid respo...

INTRODUCTION The objective of this study was to investigate the evidence for positive predictive value (PPV) of alarm symptoms and combinations of symptoms for colorectal cancer, breast cancer, prostate cancer and lung cancer in general practice. METHODS This study is based on a literature search performed in PubMed, Embase, the Cochrane database and at ClinicalTrials.gov in accordance with t...

This work focuses on studying a novel polymer/nanocrystal multilayer for the fabrication of donor and accepter typed photovoltaic device. Highly luminescent anionic CdTe nanocrystals were prepared by aqueous synthesis method using 3-mercaptopropionic acid as stabilizer. The resultant CdTe served as electron acceptor and poly(p-phenylene vinylene) (PPV) was used as electron donor. Through the el...

0026-2714/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.microrel.2009.07.053 * Corresponding author. Address: Sección de Electró Depto. de Ingeniería Electrica, Av. IPN No 2508, Apdo. DF, Mexico. Tel.: +52 55 57473786; fax: +52 55 5747 E-mail addresses: [email protected] (J.C. Sánc [email protected] (M. Estrada). This paper reports main characteristics of copolymer (BEHP-PPV)-co...

This study investigated the potentiation of porcine circovirus 2 (PCV2)-induced postweaning multisystemic wasting syndrome by porcine parvovirus (PPV) and found it was associated with excessive production of tumor necrosis factor-alpha (TNF-alpha). Colostrum-deprived conventional pigs were inoculated intranasally with PCV2 or PPV alone or in combination (PCV2 and PPV). In vitro assay of TNF-alp...

BACKGROUND The sutureless pars plana vitrectomy (ppv) using a 25-gauge instrumentation is a minimally invasive technique which is mainly performed for procedures that do not require extensive vitreous dissection. In a consecutive case series with retrospective collection of data, the advantages and the risks of this technique are discussed in comparison with the conventional 20-gauge ppv for pa...

BACKGROUND Patients with H7N9 avian flu concurrent with severe acute respiratory distress syndrome (ARDS) usually have a poor clinical outcome. Prone position ventilation (PPV) has been shown to improve the prognosis of patients with severe ARDS. This study explored the effects of PPV on the respiratory and circulatory mechanics of H7N9-infected patients with severe ARDS. METHODS Individuals ...