AIMS To identify the patent ductus arteriosus (PDA) shunt flow pattern using Doppler echocardiography; and to assess whether it could be used to predict the development of clinically significant PDA. METHODS Premature infants weighing under 1500 g, who required mechanical ventilation, and in whom daily echocardiography could be performed from day 1 until the ductus closed, and on day 7 to con...

The Probabilistic Data Association (PDA) method is extended to multiuser detection over asynchronous Code-Division Multiple Access (CDMA) communication channels. PDA models the undecided user signals as binary random variables. By approximating the Multiple Access Interference (MAI) as Gaussian noise with an appropriately evaluated covariance matrix, PDA updates the probabilities associated wit...

OBJECTIVES To describe the health issues reported using a personal digital assistant (PDA) to conduct screening at adolescent well visits, and to determine the effect of a PDA screening tool on the content and quality of the clinical interaction. DESIGN The PDA screening tool was used to record adolescent health risk behaviors, and cross-sectional exit surveys were administered before and aft...

Treatment of the large patent ductus arteriosus (PDA) in the setting of pulmonary hypertension (PH) is challenging. Left patent, the large PDA can result in irreversible pulmonary vascular disease. Occlusion, however, may lead to right ventricular failure for certain patients with severe PH. Our center has adopted a staged management strategy using medical management, noninvasive imaging, and i...

Patent ductus arteriosus (PDA) is a rare diagnosis in adults, since symptoms and signs usually occur in infancy and most cases are treated shortly after diagnosis. We present two patients who were first diagnosed with PDA during adulthood. The first case represents a more severe form of PDA, where the need for closure of the PDA is obvious. In the second case the sequelae of the PDA are less cl...

BACKGROUND Chorioamnionitis has recently been reported as a risk factor for various neonatal diseases, including cerebral palsy, bronchopulmonary dysplasia, and necrotizing enterocolitis, but its effect on patent ductus arteriosus (PDA) is unclear. We performed a systematic review and meta-analysis to evaluate the effect of chorioamnionitis on PDA. METHODS We searched PubMed, EMBASE, Cochrane...

A novel reversible fluorescent switch of a polydiacetylene liposome (PDA liposome) was realized by alternating heating and UV irradiation processes. The reversible fluorescence switching of the PDA liposome was mainly caused by the microstructural changes of the PDA backbone in the PDA liposomes under the alternating conditions of heating and UV irradiation.

The use of injectable bulking agents is a feasible alternative procedure for conventional surgical therapy. In this study, poly(dimethylsiloxane) (PDMS) microspheres coated with polydopamine (PDA) were developed as a potential injection agent to prevent migration in vocal fold. Uniform PDMS microspheres are fabricated using a simple fluidic device and then coated with PDA. Cell attachment test ...

Limited information is available on personal digital assistant (PDA) use patterns in medical settings. Recognizing that use patterns may be important considerations for development of handheld-based information systems, the authors characterized PDA use at their institution. A survey was mailed to all internal medicine physicians at the Mayo Clinic, Rochester, Minnesota, in May 2002. PDA use pr...

Twenty-six to forty percent of individuals suffering from panic disorder with agoraphobia (PDA) do not benefit significantly from cognitive-behavior therapy. Marital problems are among risk factors that may explain this limited impact. Some studies suggest that PDA treatment outcome is related to the couple's ability to communicate and solve problems during and after treatment. It may be also u...