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At least 37 records · Page 2Linked to original sources
PubMed1998

Response of the renal pelvis and ureter to distension of the contralateral renal pelvis and ureter: identification of the reno-renal pelvic reflex.

For the study of the relationship of the pelviureteric system of one kidney to that of the contralateral one, bilateral cutaneous ureterostomy was performed in 14 dogs. The renal pelvis (RP) and ureter (U) of one side were distended separately with a balloon filled with saline in increments of 1 and 0.25 ml, respectively, and the pressure response of the contralateral RP and U was recorded. The test was repeated after anesthetization of the RP and U. RP distension with 1 ml of saline effected a pressure rise (P < 0.05) in the ipsilateral RP but no pressure response in the ipsilateral U or the contralateral RP or U (P > 0.05). RP distension with 2, 3, and 4 ml of saline induced a significant pressure rise in the ipsi- and contralateral RP but not in the ureters. Ureteric distension produced a pressure elevation (P < 0.05) on the ipsilateral U but had no effect on the contralateral U (P > 0.05) or on either of the renal pelves (P > 0.05). Distension of the anesthetized RP or U effected no pressure response in any of the ipsi- or contralateral RPs or Us. In conclusion, distension of the RP with large volumes led to an increase in pressure in the contralateral RP but not in the U. A reflex relationship is postulated to exist between the two renal pelves and to be mediated through a reflex we call the reno-renal pelvic reflex. It seems that this reflex acts to allow either of the kidneys to share an extra load of the other one by increasing the contractile activity of the RP, thus assumedly assisting the regulation of urine flow.

Animals↗
PubMed1982

Potassium-induced contractions in pig ureter strips. Consequences for helical muscle-fiber model of ureter.

Contractions were chemically induced in vitro in pig uterus segments by a high potassium concentration in a metabolic solution. Slow contractions were found mainly in the transverse direction. The near absence of contractions in the longitudinal direction is ascribed to a nearly circular orientation of the muscle fibers. (In terms of the helical muscle-fiber model of the ureter, our findings would correspond to a pitch of 3 to 5 degrees for the helix.) It is further postulated that the coupling structure of fibers in the transverse direction, determining an annular contraction mode, differs from that in the longitudinal direction, determining the longitudinal propagation of the annular contraction mode. The over-all conclusions on the basis of our results is that the helical muscle-fiber model now generally assumed for the ureter must be greatly modified to correlate with the experimental facts that its continued use is misleading and undesirable.

Animals↗
PubMed1979

Replacement of the ureter by small intestine: clinical application and results of the ileal ureter in 89 patients.

Partial or total replacement of the ureter by small intestine was performed at the University of California/Los Angeles Hospital and affiliated hospitals 94 times in 92 patients from 1954 to 1978. Indications included recurrent calculi, ureteral stricture, fistula, congenital obstruction of the ureter and ureteral carcinoma with a solitary kidney. A special use has been for undiversion of an ileal conduit. Followup evaluation was possible in 95% of the patients and ranged from 6 months to 23 years. Thirty-six patients were followed for more than 5 years. The operation was judged successful in 81% of the cases. Serum creatinine was unchanged or decreased in 75.7% and the pyelogram was unchanged or showed decreased dilatation in 84.6% of the patients. Although reflux was seen in 40 of 55 patients who had cystograms 39 (97.5%) were considered to be treated successfully. Indications for and results of the operation are discussed. The procedure is recommended as optimal therapy for carefully selected situations when the normal urinary tract cannot be used.

Child↗
PubMed1996

Synchronous bilateral carcinoma of the ureter in association with unilateral incomplete duplication of the ureter.

A case of bilateral synchronous ureteral tumors, in association with a unilateral incomplete duplication of ureter, is presented. This patient underwent right nephroureterectomy with removal of a cuff of bladder, partial resection of left ureter, and ileal loop interposition between renal pelvis and bladder. Followup showed no recurrence in the residual urinary tract 2-years postoperatively.

Carcinoma, Transitional Cell↗
PubMed2002

[Ureter cancer of complete double renal pelvis and ureter: a case report].

A 66-year-old man presented at our hospital with left back pain. Intravenous pyelography, computerized tomography and magnetic resonance imaging revealed ureteral tumors of the complete left double renal pelvis and the ureter. An endoscopic examination disclosed a papillary tumor from the left ureteral orifice of the lower pole of the kidney. A transurethral resection of the tumor was done, and the pathological features revealed transitional cell carcinoma (PTa, grade 2). A left nephroureterectomy and a partial cystectomy were also carried out; macroscopic examinations showed a non-papillary tumor on the middle portion of the left ureter originating from the upper pole of the kidney. Microscopic examinations revealed transitional cell carcinoma (PT3, grade 3, PL1, PV1). Adjuvant chemotherapy (M-VAC) was administered but discontinued because of severe side effects. Dispite recurrence with retro-peritoneal lymph node metastasis, the patient is alive and again undergoing M-VAC chemotherapy 22 months after the initial surgery. However, the evaluation of the chemotherapy was "no change".

Aged↗
PubMed1978

Replacement of the ureter by small intestine: clinical application and results of the ileal ureter in 89 patients.

Partial or total replacement of the ureter by small intestine was performed at the University of California/Los Angeles Hospital and affiliated hospitals 94 times in 92 patients from 1954 to 1978. Indications included recurrent calculi, ureteral stricture, fistula, congenital obstruction of the ureter and ureteral carcinoma with a solitary kidney. A special use has been for undiversion of an ileal conduit. Followup evaluation was possible in 95 per cent of the patients and ranged from 6 months to 23 years. Thirty-six patients were followed for more than 5 years. The operation was judged successful in 81 per cent of the cases. Serum creatinine was unchanged or decreased in 75.7 per cent and the pyelogram was unchanged or showed decreased dilatation in 84.6 per cent of the patients. Although reflux was seen in 40 of 55 patients who had cystograms 39 (97.5 per cent) were considered to be treated successfully. Indications for and results of the operation are discussed. The procedure is recommended as optimal therapy for carefully selected situations when the normal urinary tract cannot be used.

Carcinoma↗
PubMed1977

Studies in ureteral regeneration: replacement of a large segment of ureter with an in situ pedicle graft of proximal ureter.

The phenomenon of ureteral regeneration has been of interest to clinicians, anatomists, and physiologists for many years. The object of this investigation was to study the regeneration of a long pedicle graft of ureter. Regeneration of the pedicle graft over a stent took place in 4 to 5 weeks. At sacrifice 8 to 10 months postoperatively, 7 of 10 operations were completely successful with no evidence of hydronephrosis, obstruction, or pyelonephritis. Two animals exhibited slight dilation of the upper tracts, and one operation was a failure. It is evident from this study that a strip of ureter removed from the ureteral artery will regenerate over a stent in 4 to 5 weeks if the blood supply from the adjacent adventitia is left intact.

Animals↗
PubMed1984

Ileal segment replacement of ureter. II. Dynamic characteristics of refluxing, nonrefluxing, and totally tapered ileal ureter.

The pressure characteristics and cinefluoroscopic appearances of a refluxing, nonrefluxing, and totally tapered ileal " neoureter " were compared in 22 dogs with normal bladder function. The totally tapered ileal segment with a reflux preventing ileovesicostomy simulates normal ureteral peristalsis most closely on cinefluoroscopic evaluation. Pressure gradients across the ileovesical junction though were similar in refluxing and nonrefluxing ileovesicostomies , as well as in totally tapered ureters.

Animals↗
PubMed1983

Endometriosis of the ureter can present as renal failure: a case report and review of endometriosis affecting the ureters.

Of the female subjects with pelvic endometriosis 1.2 per cent are found to have involvement of the genitourinary tract. Ureteral obstruction secondary to endometriosis is uncommon and usually is unilateral. We report a case of renal failure with hypertension due to bilateral ureteral obstruction from pelvic endometriosis. Ureteral endometriosis and its treatment are discussed. In premenopausal women presenting with bilateral obstruction of the distal ureters endometriosis should be part of the differential diagnosis.

Acute Kidney Injury↗