87 centres across Europe, the US, Canada and South Africa participated between December 2004 and September 2007.
Nerve-sparing radical prostatectomy (NSRP) is the gold-standard therapy for prostate cancer in men with a life expectancy of 10 years or more. The risk of erectile dysfunction (ED) following NSRP is significant. This is caused by neuropraxia - the usually temporary failure of nerve conduction in the absence of structural changes due to compression, ischemia or blunt injury - which inevitably occurs during the procedure. Ultimately this may lead to the development of fibrosis within the corpus cavernosa and cause ED.
To prevent the onset of postoperative ED, the use of phosphodiesterase type 5 (PDE5) inhibitors was introduced. These agents prevent the breakdown of cyclic guanosine monophosphate in cavernosal tissue, which plays a role in the prevention of cell death and fibrosis, and may thus exert a protective effect on cavernosal smooth muscle.
Participants were recruited to this first robustly designed, evidence-based, multi-centre study approximately one month before they were scheduled to undergo NSRP. A total of 423 patients completed the study. The inclusion of the on-demand dosing regimen enabled comparison of the currently recommended guidelines for the use of PDE5 inhibitors with a proposed nightly dosing regimen, which was suggested to have potential positive effects on erectile function. The results clearly show that nightly dosing with vardenafil does not have any effect beyond that of on-demand use.
The study shows that on-demand use of vardenafil during the treatment period was associated with significantly greater erectile function and sexual intercourse completion rates compared to placebo. The success rates for the vardenafil on-demand group were also higher than for the nightly group. These data indicate that the use of on-demand vardenafil is of greater benefit than nightly treatment in patients following NSRP surgery and, in general, support the on-demand use of PDE5 inhibitors following NSRP surgery over a daily dosing regimen. This prompts reconsideration of the current practice of prescribing nightly PDE5 inhibitor therapy, as on-demand use of vardenafil is equally effective in men with ED following NSRP, a notoriously difficult-to-treat patient population.
Koos Admiraal | alfa
Diagnoses: When Are Several Opinions Better Than One?
19.07.2016 | Max-Planck-Institut für Bildungsforschung
High in calories and low in nutrients when adolescents share pictures of food online
07.04.2016 | University of Gothenburg
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
24.10.2016 | Earth Sciences
24.10.2016 | Life Sciences
24.10.2016 | Physics and Astronomy