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Accurate Placement (accurate + placement)
Selected AbstractsMagnetic resonance imaging to evaluate NASHA/Dx gel (ZuidexTM) for stress urinary incontinenceINTERNATIONAL JOURNAL OF CLINICAL PRACTICE, Issue 10 2006A. FIANU-JONASSON Summary The ZuidexTM, system for the treatment of stress urinary incontinence consists of non-animal stabilised hyaluronic acid/dextranomer (NASHA/Dx) gel and a precision guide, the ImplacerTM,. Whether the Implacer accurately deposits NASHA/Dx gel in the desired location within the urethral wall was investigated by magnetic resonance imaging (MRI), performed at a mean of 35 days post-treatment. Three or more deposits were observed in 11 of 16 patients (68.8%), with 39 of the 50 deposits clearly located within the urethral wall, as intended. Fourteen of 16 patients (87.5%) demonstrated improvement in their incontinence at 3 months, sustained at 12 months in 13 patients. No significant correlations between total implant volume and improvements in incontinence were observed at 3 months (p , 0.16) and 12 months (p , 0.30). In conclusion, accurate placement of NASHA/Dx gel into the desired location within the urethral wall was achieved in the majority of cases using the Implacer device, without endoscopic guidance. [source] An investigation into time domain Doppler modelling using the TLM numerical methodINTERNATIONAL JOURNAL OF NUMERICAL MODELLING: ELECTRONIC NETWORKS, DEVICES AND FIELDS, Issue 5 2007I. J. G. Scott Abstract The effects observed by a moving source and stationary receiver, or conversely stationary source and moving receiver are well known to physicists. The Doppler effect as it is commonly known is recognized as a perceived change in frequency of the incident signal upon the receiver, caused by the motion of either the source or receiver with respect to the stationary component, occurring in both electromagnetic (transverse) and acoustic (longitudinal) waves. This paper will primarily focus on the acoustic Doppler effect in the time domain, simulating a variety of scenarios using transmission line matrix (TLM) modelling in which the effect can be observed, proceeding to compare the accuracy of the various models generated. A new technique to allow arbitrary placement of boundaries of a TLM mesh will also be introduced and analysed allowing accurate placement of the moving walls within the simulation. Copyright © 2007 John Wiley & Sons, Ltd. [source] Pollinator shifts and the loss of style polymorphism in Narcissus papyraceus (Amaryllidaceae)JOURNAL OF EVOLUTIONARY BIOLOGY, Issue 6 2010R. PÉREZ-BARRALES Abstract Darwin proposed that the driving force for the evolution of style polymorphisms is the promotion of cross-pollination between style morphs, through accurate placement of pollen on the pollinator's body. This hypothesis has received much attention, but the effect of different pollinators in the fitness of morphs remains poorly understood. Narcissus papyraceus is a style dimorphic species (long -L- and short -S- styled) with isoplethic (1 : 1) and L-monomorphic populations, mainly visited by long-tongued (LT) nocturnal and short-tongued (ST) diurnal pollinators, respectively. We studied natural female fertility of morphs, and assessed the role of diurnal and nocturnal pollinators. We also quantified female fertility of the morphs in experimental populations with different morph ratio, exposed to predominately long- or short-tongued pollinators. We found that with LT pollinators, both morphs were successfully pollinated in all morph ratio conditions, suggesting that these insects could be involved in maintenance of the polymorphism, although other factors may also play a role. However, with ST pollinators, S-plants displayed less fertility than L-plants, and mating among L-plants was favoured, implying that the polymorphism is lost. These results underscore the role of pollinators on variations in style polymorphism. [source] Retrograde Weight Implantation for Correction of Lagophthalmos,THE LARYNGOSCOPE, Issue 9 2004Chuan-Hsiang Kao MD Abstract Objectives: Gold weight implantation is the most commonly used method for surgical correction of paralytic lagophthalmos. Numerous techniques for placement of the weight have been described, yet complications with these methods continue to occur (implant migration or extrusion, wound infection, failure to correct the lagophthalmos, and excessive postoperative ptosis). We developed a retrograde, postlevator aponeurosis method for implantation to improve the placement and fixation of the weight. This study describes the rationale, technique, and surgical outcome of the retrograde approach. Study Design: Retrospective analysis. Methods: Data maintained and collected on 25 consecutive cases of retrograde upper lid weight implantation for paralytic lagophthalmos. Pre- and postoperative photographs were obtained, and patients were followed for at least 6 months. All procedures were performed by or under the direction of a single surgeon at tertiary academic medical centers (University of California, San Diego and University of Zurich, Switzerland). Results: Twenty-five consecutive patients were evaluated, 16 male and 9 female, ranging in age from 27 to 86 years. There were no surgical failures or perioperative complications and no instances of implant migration or extrusion. One patient developed a delayed infection requiring removal of the implant, and one patient required replacement of the gold weight with a platinum chain implant to better fit the contour of her eyelid. Conclusions: Retrograde implantation allows more accurate placement of the weight while creating a permanent circumferential seal for fixation. The procedure is minimally invasive, less traumatic than previous methods, and produces an excellent cosmetic result. The efficacy has been demonstrated in the outcome of the 25 cases described in this study. [source] | ||||||||||