OBJECTIVE To quantitatively compare the extent of posterior capsule opacification (PCO) after polymethylmethacrylate (PMMA), silicone, and soft acrylic intraocular lens implantation. PATIENTS AND METHODS A total of 240 eyes from 240 patients undergoing implant surgery were randomized into 3 groups based on the type of lens implanted: PMMA, silicone, and soft acrylic. The density value of PCO ...

In 1917 J. P. Peters first recognized that the ventilatory response to metabolic acidosis could be monitored by following the changes in the alveolar carbon dioxide partial pressure. In addition he showed that in stable states of acidosis there was a close relationship between alveolar Pco, and the CO, combining power of the blood. More recently technical refinements have facilitated measuremen...

OBJECTIVE Pulse contour analysis can be used to provide beat-to-beat cardiac output (CO) measurement. The current study sought to evaluate this technique by comparing its results with lithium dilution CO (LiCO) measurements. DESIGN Prospective, observational study. SETTING Surgical intensive care unit. PATIENTS Twenty-two patients after cardiac or major noncardiac surgery. MEASUREMENTS ...

Photocatalytic oxidation (PCO) is a successful method for indoor air purification, especially removing low-concentration pollutants. Volatile organic compounds (VOCs) form class of pollutants that are released into the atmosphere by consumer goods or via human activities. Once they enter atmosphere, some might combine with other gases to create new pollutants, which can have detrimental effect ...

The visual outcome obtained after cataract removal may progressively decline because of posterior capsular opacification (PCO). This condition can be treated by creating an opening in the posterior lens capsule by Nd:YAG laser capsulotomy. PCO optical imperfections cause several light reflection, refraction, and diffraction phenomena, which may interfere with the functional and structural tests...

PURPOSE This study aimed to determine the reasons behind the failure of laser capsulotomy (LC) performed for significant posterior capsular opacification (PCO). METHODS Eighty-eight eyes of 88 patients referred for LC at a tertiary care center were retrospectively analyzed. The data recorded included the cause of cataract, visual acuity, duration of PCO, location of PCO, intraocular lens (IOL...

PURPOSE To evaluate the development of posterior capsule opacification (PCO) in patients implanted with 5.5 mm optics, single-piece or three-piece acrylic intraocular lens (IOL) in cataract surgery prospectively. METHODS This study was carried out on 267 eyes of 249 patients implanted with three-piece, 5.5 mm optics, acrylic IOL and 252 eyes of 244 patients implanted with single-piece, 5.5 mm...

BACKGROUND Anti-Mullerian hormone (AMH) is expressed in pre- and small-antral follicles. High serum levels are found in women with polycystic ovaries (PCO), accordant with their increased content of small follicles. To evaluate the relationship between AMH, folliculogenesis and hyperandrogenism, we compared serum AMH levels between women with PCO with and without hyperandrogenism and normal con...

OBJECTIVE To determine whether conversion of high-response gonadotropin/intrauterine insemination (IUI) cycles to "rescue" in vitro fertilization (IVF) yields a higher implantation and pregnancy rate as found in matched IVF controls. DESIGN A prospective study with a retrospective controlled section. SETTING Baskent University Department of Obstetrics and Gynecology. PATIENT(S) Thirty-two...

The steady-state CO(2) flux across thin layers of 30 g/100 ml albumin solutions was measured in two different CO(2) partial pressure ranges (boundary PCO(2) values 3 and 8 torr, and 160 and 650 torr, respectively). From the data the apparent diffusion coefficient for CO(2), DCO(2), was calculated. In the high PCO(2) range a value of DCO(2) was found which is to be expected on the basis of diffu...