Journal ArticleDOI
Disturbed urinary transport in the pelvi-calyceal system in calcium-oxalate stone patients
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From X-ray videograms recorded by means of Siemens urography, four different urinary transport types could be distinguished as well as the duration of the contraction periods and the intervals between the PCS-contractions.Abstract:
This study is intended to elucidate the process of urinary transport through the pelvi-calyceal system (PCS). PCS-motility of a total of 28 PCS was qualitatively and quantitatively determined in 9 stone patients and 14 control persons by examination of contrast medium excretion. From X-ray videograms recorded by means of Siemens urography, four different urinary transport types could be distinguished as well as the duration of the contraction periods and the intervals between the PCS-contractions. In stone patients physiological types of urinary transport are less common (33%) than in control subjects (81.25%). In stone patients the PCS is often characterized by reduced or even absent motility. Calyceal reflux is usually found in the systolic phase of PCS-contractions, which may apparently be regarded as a physiological process.read more
Citations
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Journal ArticleDOI
Long-term followup in 1,003 extracorporeal shock wave lithotripsy patients.
TL;DR: Rates free of stones were influenced mainly by the primary stone location and the number of stones in a renal unit, and the pre-treatment stone volume, as determined by measuring the stone area in square millimeters, did not influence the final ratesfree of stones for calculi up to 400 mm.
Journal ArticleDOI
Renal Calculi in Lower Pole Calices: What is the Best Method of Treatment?
TL;DR: Since ESWL is an effective noninvasive procedure without the need for routine anesthesia and hospitalization, and with prompt return of the patient to a normal life it must be considered the method of choice for lower caliceal stones less than 2 cm.
Book ChapterDOI
Comparison of Extracorporeal Shock Wave Lithotripsy and Percutaneous Nephrostolithotomy for the Treatment of Renal Calculi in Lower Pole Calices
Elspeth M. McDougall,John D. Denstedt,R. D. Brown,Ralph V. Clayman,Glenn M. Preminger,Bruce L. McClennan +5 more
TL;DR: Interestingly, there was no difference between the two treatment groups in regard to recurrent stone disease; 10% of ESWL patients had a recurrence within 18 months, and 11% of PCNL patients hadA recurrence with 22 months following treatment.
Journal ArticleDOI
Predictive Factors of Lower Calyceal Stone Clearance after Extracorporeal Shockwave Lithotripsy (ESWL): A Focus on the Infundibulopelvic Anatomy
TL;DR: Lower pole anatomy has a significant impact on ESWL results, and not less than 70 degrees and an infundibular length of < 50 mm is preferable to achieve favorable outcome.
Journal ArticleDOI
Kidney models of calcium oxalate stone formation.
TL;DR: Three mathematical models used to describe the flow of urine through the renal tubule and the composition of tubular fluid throughout the length of the nephron are compared and the likelihood of individual crystals growing large enough to be trapped within the measured urine transit time of 3–4 min is very small.
References
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Journal Article
Urodynamics of the upper urinary tract.
TL;DR: The control of ureteral peristaltic contractions by a pacemaker system is shown in a series of experimental observations on the anesthetized dog and the pacemaker frequency is constant during transient increases in flow rate of more than one order of magnitude.
Book ChapterDOI
Urinary Flow and Ureteral Peristalsis
TL;DR: The only known function of the renal pelvis and ureter is to convey urine from the kidney to the urinary bladder in two ways: by peristaltic activity and by a pressure gradient in an open system.