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1.
  • Gladh, Gunilla, 1943-, et al. (författare)
  • Voiding pattern in healthy newborns
  • 2000
  • Ingår i: Neurourology and Urodynamics. - 0733-2467 .- 1520-6777. ; 19:2, s. 177-184
  • Tidskriftsartikel (refereegranskat)abstract
    • A 4-hour observation period has been used in infants to investigate suspected bladder dysfunction. The aim of the present study was to extend the usefulness of this protocol by establishing reference values for voiding frequency, intervals, volumes, and residual urine in healthy newborns. The study included 51 healthy newborns, 26 girls and 25 boys, aged 3 to 14 days. During a 4-hour period, all micturitions and residuals were recorded as well as feeding, sleeping, crying, and defecations. The observation was completed with the child undressed to observe the urinary stream during one void. Different provocation tests were tried to induce urinary leakage. All newborns voided with a stream, about once per hour, with a median volume of 23 mL. For each voiding parameter, there was a large inter- and intra-individual variability. Double voidings were common as well as sizable residual volumes. The diuresis was about six times higher than in healthy school children. The healthy newborns did not leak during provocation tests such as manual compression of the bladder.
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2.
  • Jiang, Chong-He (författare)
  • Modulation of the micturition reflex pathway by intravesical electrical stimulation : An experimental study in the rat
  • 1998
  • Ingår i: Neurourology and Urodynamics. - 0733-2467 .- 1520-6777. ; 17:5, s. 543-554
  • Tidskriftsartikel (refereegranskat)abstract
    • Intravesical electrical stimulation (IVES) is used clinically to improve bladder evacuation in patients with inadequate micturition contractions. The procedure involves field stimulation of A bladder mechanoreceptor afferents resulting in a prolonged enhancement of the micturition reflex. The aim of the present experimental study in the rat was to identify the site for this neuromodulation, whether it was due to sensitization of bladder mechanoreceptors, to enhancement of transmission in the central micturition reflex pathway, or to improved effectiveness of the peripheral motor system of the bladder. The experiments were performed on female rats, anesthetized by -chloralose. Multi-unit afferent or efferent activity was recorded from bladder pelvic nerve branches during repeated cystometries before and after IVES. The specific antagonist CPPene was used to block central glutaminergic receptors of NMDA type. Micturition threshold volume decreased significantly after IVES. The afferent threshold volume, peak response, and pressure sensitivity were unchanged as were the peak efferent activity and bladder contractility. There was no efferent activity until just before the micturition contraction. The IVES-induced decrease in micturition threshold was blocked by prior administration of the NMDA (N-methyl-D-aspartic acid) antagonist CPPene (3-(2-carboxypiperazin-4-yl)-1-propenyl-1-phosphonic acid). The findings indicate that the IVES-induced modulation of the micturition reflex is due to an enhanced excitatory synaptic transmission in the central micturition reflex pathway. The observed modulation may account for the clinical beneficial effect of IVES treatment.
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4.
  • Andersson, Karl-Erik, et al. (författare)
  • Phosphodiesterases (PDEs) and PDE inhibitors for treatment of LUTS
  • 2007
  • Ingår i: Neurourology and Urodynamics. - : John Wiley and Sons. - 0733-2467 .- 1520-6777. ; 26:6, s. 928-933
  • Tidskriftsartikel (refereegranskat)abstract
    • Lower urinary tract (LUT) smooth muscle can be relaxed by drugs that increase intracellular concentrations of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). Both of these substances are degraded by phosphodiesterases (PDEs), which play a central role in the regulation of smooth muscle tone. The distribution and functional significance of PDE enzymes vary in different tissues of the LUT. Targeting specific PDE isoenzymes should thus allow organ selectivity. PDE 4 and 5 appear to predominate in the prostate, PDE 1 and 4 are thought to influence detrusor smooth muscle function, and PDE 5 may be functionally important in the urethra and vasculature. Studies on the use of PDE inhibitors to treat various LUT symptoms (LUTS), have yielded favorable results. Thus, positive effects of the PDE 5 inhibitors sildenafil and tadalafil on symptoms and quality of life in men with LUTS, erectile dysfunction, and BPH have also been demonstrated. These effects may be due to effects on cGMP signaling and/or modification of afferent input from bladder, urethral, and prostate tissue. This review gives an update on the distribution of PDEs in structures relevant for LUT function, and discusses how inhibition of these enzymes can contribute to beneficial effects on LUTS. Information for the review was obtained from searches of the PubMed database, and from the authors' files.
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5.
  • Ask, Per, et al. (författare)
  • A SHORT-TIME-DELAY URINARY FLOWMETER
  • 1985
  • Ingår i: Neurourology and Urodynamics. - 0733-2467 .- 1520-6777. ; 4:3, s. 247-256
  • Tidskriftsartikel (refereegranskat)abstract
    • A urinary flowmeter has been designed, using a quickly rotating disc and a balance principle. The flowmeter has a fast and accurate response to changing flows. The time delay of the flowmeter is less than about 0.25 s. The improved accuracy in recording urinary flow using the presented flowmeter should make it possible to extract more information from the detrusor pressure and urinary flow relations, relevant for assessing lower urinary tract function.
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6.
  • Ask, Per, et al. (författare)
  • PRESSURE MEASUREMENT TECHNIQUES IN URODYNAMIC INVESTIGATIONS
  • 1990
  • Ingår i: Neurourology and Urodynamics. - 0733-2467 .- 1520-6777. ; 9:1, s. 1-15
  • Tidskriftsartikel (refereegranskat)abstract
    • It is apparent that the use of accurate pressure measurement techniques is essential for the outcome of urodynamic investigations. The aim of this paper is to estimate the demands on urodynamic pressure measurements and to review the properties of various techniques used. For the infused catheter technique, the dynamic properties are very much dependent on the complicance of the infusion system. With optimal infusion, the bandwidth and the pressure rise rate seem to be sufficient for most applications. Intraluminal microtransducers have a high bandwidth, but a certain fiber optic transducer cannot accurately measure mechanical pressure in the collapsed urethra. The principal differences in measuring hydrostatic pressure between the infused catheter technique and microtransducers should be observed. Flexion artefacts are a problem when measuring urethral pressure profiles. Newly developed transducers may offer a solution to this problem.
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8.
  • Asklund, Ina, et al. (författare)
  • Mobile app for treatment of stress urinary incontinence : a randomized controlled trial
  • 2017
  • Ingår i: Neurourology and Urodynamics. - : John Wiley & Sons. - 0733-2467 .- 1520-6777. ; 36:5, s. 1369-1376
  • Tidskriftsartikel (refereegranskat)abstract
    • AIMS: To evaluate the effect of a mobile app treatment for stress urinary incontinence (SUI) in women.METHODS: Randomized controlled trial, conducted 2013-2014 in Sweden. Community-dwelling adult women with ≥1 SUI episode/week recruited through our website and randomized to app treatment (n = 62) or control group (postponed treatment, n = 61). One participant from each group was lost to follow-up. Intervention was the mobile app Tät(®) with a treatment program focused on pelvic floor muscle training (PFMT), and information about SUI and lifestyle factors. Primary outcomes, 3 months after randomization: symptom severity (International Consultation on Incontinence Modular Questionnaire Urinary Incontinence Short Form [ICIQ-UI SF]); and condition-specific quality of life (ICIQ Lower Urinary Tract Symptoms Quality of Life [ICIQ-LUTSqol]).RESULTS: One hundred and twenty-three women were included (mean age 44.7), with moderate/severe SUI (97.5%, 120/123), mean ICIQ-UI SF score 11.1 (SD 2.8) and mean ICIQ-LUTSqol score 34.4 (SD 6.1) at baseline. At follow-up, the app group reported improvements in symptom severity (mean ICIQ-UI SF score reduction: 3.9, 95% confidence interval 3.0-4.7) and condition-specific quality of life (mean ICIQ-LUTSqol score reduction: 4.8, 3.4-6.2) and the groups were significantly different (mean ICIQ-UI SF score difference: -3.2, -4.3to -2.1; mean ICIQ-LUTSqol score difference: -4.6, -7.8 to -1.4). In the app group, 98.4% (60/61) performed PFMT at follow-up, and 41.0% (25/61) performed it daily.CONCLUSIONS: The mobile app treatment was effective for women with SUI and yielded clinically relevant improvements. This app may increase access to first-line treatment and adherence to PFMT.
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