| 1. |
- Chen, Hui, et al.
(författare)
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Repeat periods of electrical stimulation prolong the modulation of the micturition reflex in the rat
- 2018
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Ingår i: Neurourology and Urodynamics. - : WILEY. - 0733-2467 .- 1520-6777. ; 37:8, s. 2480-2486
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Tidskriftsartikel (refereegranskat)abstract
- AimsMethodsThe aim of this study was to determine if the duration of the micturition reflex modulation could be prolonged by repeated periods of afferent stimulation in the decorticated rat. Eighteen female Sprague-Dawley rats were used for the study, 10 for intravesical electrical stimulation (IVES), and 8 for Ano-genital pudendal afferents stimulation. Repeated constant flow cystometries were performed with body-warm saline (0.06-0.1mL/min) at about 10min interval. The selected afferents were stimulated continuously for 5min at maximal intensity. The same stimulation was repeated six times with a pause of 5min between the stimulations. The mean threshold volume of cystometries performed during one hour before and each hour after the stimulation were compared. ResultsConclusionsAfter six periods of IVES, the micturition threshold volume decreased to its lowest value (62% of control) during the first hour and remained at 80% 4h later (n=10, Pamp;lt;0.01). Ano-genital afferent stimulation produced a corresponding increase in the micturition threshold volume. The long-lasting poststimulation effect was again observed for more than 5h. During the first hour the mean threshold volume increased to 211% of controls and it remained at about this level for the entire observation period (n=8, Pamp;lt;0.01). Repeated short periods of stimulation prolonged the modulatory effect well beyond the stimulation period. The findings provide experimental evidence supporting the clinical application of IVES and ano-genital stimulation for treatment of neurogenic urinary bladder dysfunction.
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| 2. |
- Kristan, Matej, et al.
(författare)
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The first visual object tracking segmentation VOTS2023 challenge results
- 2023
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Ingår i: 2023 IEEE/CVF International conference on computer vision workshops (ICCVW). - : Institute of Electrical and Electronics Engineers Inc.. - 9798350307443 - 9798350307450 ; , s. 1788-1810
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Konferensbidrag (refereegranskat)abstract
- The Visual Object Tracking Segmentation VOTS2023 challenge is the eleventh annual tracker benchmarking activity of the VOT initiative. This challenge is the first to merge short-term and long-term as well as single-target and multiple-target tracking with segmentation masks as the only target location specification. A new dataset was created; the ground truth has been withheld to prevent overfitting. New performance measures and evaluation protocols have been created along with a new toolkit and an evaluation server. Results of the presented 47 trackers indicate that modern tracking frameworks are well-suited to deal with convergence of short-term and long-term tracking and that multiple and single target tracking can be considered a single problem. A leaderboard, with participating trackers details, the source code, the datasets, and the evaluation kit are publicly available at the challenge website1
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| 3. |
- Zeng, Jianwen, et al.
(författare)
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Bladder mechanoreceptor changes after artificial bladder outlet obstruction in the anesthetized rat
- 2012
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Ingår i: Neurourology and Urodynamics. - : Wiley-Blackwell. - 0733-2467 .- 1520-6777. ; 31:1, s. 178-184
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Tidskriftsartikel (refereegranskat)abstract
- Aims Experimental animal models of bladder outlet obstruction (BOO) have reproduced several features of BOO in man, i.e., detrusor hypertrophy, instability, frequency, and residual urine. This study was focused on the mechanisms underlying the development of residual urine in patient with benign prostatic hyperplasia (BPH) by examining changes in tension sensitivity of bladder mechanoreceptors in rat model. Methods: Female adult Sprague-Dawley rats including 12 BOO and 17 sham operated rats were used in this study. Cystometrograms together with the bladder afferent activity were recorded. Tension sensitivity of the afferents was determined by plotting the normalized afferent response against the contraction evoked bladder pressure at different volumes. Degree of obstruction was assessed by the wet weight of the bladder at the end of the experiment. Results: The bladder weight, maximal bladder capacity, micturition threshold volume, peak contraction force, and volume at peak contraction force were all significantly increased in obstructed animals. The threshold volume for afferent activation was increased ( mean 0.60 ml compared to 0.15 ml in controls; P andlt; 0.001), positively correlated with the bladder weight ( r 0.74). The tension sensitivity of the bladder mechanoreceptors and the slope of their normalized pressure-response functions were significantly lower at the comparable volumes in the obstructed animals. Conclusions: Rats with BOO had bladder mechanoreceptors with higher threshold volumes and lower tension sensitivity. Such changes would result in a weaker afferent drive of the micturition reflex. Similar changes may contribute to the development of residual urine and retention in patients with BOO. Neurourol. Urodynam. 31: 178-184, 2012. (C) 2011 Wiley Periodicals, Inc.
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