Continence interval in elderly incontinent men

Urinary incontinence is a serious management problem among elderly patients. The care and management of chronic care patients is more difficult in those having urinary incontinence. The level of care required is dependent on both the continence and incontinence behavior of the patient. The continence behavior in this study is presented as the time interval between episodes of involuntary urine loss. The continence interval in elderly inpatient men having severe incontinence was found to be significantly longer in patients having a larger measured cystometric bladder capacity as well as in patients having greater independence in activities of daily living. Significant variability in the continence interval was measured for each patient over a wide range of continence intervals and resulted in an irregular pattern of time between episodes of incontinence. The irregular continence intervals suggest an instability of the central nervous system sensory-motor regulatory mechanism of bladder control in the elderly.     

Spermidine/Spermine N-Acetyltransferase, a New Biochemical Marker for Epithelial Proliferation in Rat Bladder

We examined the activity of spermidine/spermine N ¹-acetyltransferase (SAT), a rate-limiting enzyme of the biodegradation of polyamines, in N -butyl- N -(4–hydroxybutyI)nitrosamine-induced transitional cell carcinoma (TCC) and melamine-induced papillomatosis of rat bladder, and compared the activity to that of ornithine decarboxylase (ODC). Both activities were higher in both lesions than in control rats. The difference between SAT and ODC activities in cancerous tissue and papillomatosis was not significant. Cells stained for proliferating cell nuclear antigen (PCNA) were abundant in papillomatosis. TCC had areas with much PCNA. The results indicated that an elevation of SAT activity occurs in both reversible and irreversible proliferation of bladder epithelium and could be important in bladder carcinogenesis.     

图像分析DNA含量对判断膀胱移行细胞癌分级和预后的意义

采用IBAS图像分析系统检测37例膀胱移行细胞癌病人的肿瘤细胞DNA含量，其中35例随访18个月至7年（平均5l个月），结果显示DNA含量和AN出现率增加与肿瘤的恶性程度有关（P＜0.01和P＜0.05）；肿瘤复发亦与非整倍体细胞（AN）出现率密切相关，AN出现率小于10％无复发，＜30％5例复发，＞30％9例复发。研究资料表明，图像分析技术测定细胞核的DNA含量对判断膀胱移行细胞癌病人的分级和预后有重要意义。     

Nuclear p53 Overexpression in Bladder, Prostate, and Renal Carcinomas

Background :
The aim of this study was to examine nuclear p53 overexpression in transitional cell carcinoma of the bladder, adenocarcinoma of the prostate, and renal cell carcinoma.
Methods :
Forty-four pathologic specimens from 39 bladder cancer patients, 41 prostatic adenocarcinoma, and 39 renal cell carcinoma specimens were analyzed immunohistochemically with D07 monoclonal antibody to detect the expression of the mutant p53 gene. Overexpression was said to occur when the number of positively-stained tumor nuclei were≥ 10% in each specimen. p53 overexpression was correlated with the clinical and histopathological features of these cancers.
Results :
Nuclear p53 overexpression occurred in 18.2% of transitional cell bladder cancer specimens, 12.2% of prostate cancer specimens, and 17.9% of renal cell cancer specimens. Statistical analyses showed that grade, vascular invasion, and necrosis in bladder cancer, a high Gleason score in prostate cancer, and the 1-year mortality rate in renal cancer were significantly related with p53 nuclear overexpression (P<0.05).
Conclusion :
Using the D07 monoclonal antibody, nuclear p53 overexpression is relatively uncommon in urologic malignancies, and moderately correlates with several histopathological and clinical features of urologic malignancies.     

人体膀胱移行上皮癌细胞系(TSB-90,TSB-91)的建立及其生物学特性

从1例膀胱癌患者的癌组织培养中，分离得到2个不同生长特性的悬浮生长型细胞系，定名为TSB-90和TSB-91。在培养过程中，对其生物学特性进行了细胞和亚细胞水平的探讨，并进行了核型分析。发现2个细胞系核型的演化趋势有明显差异，生物学特性也不尽相同。这可能与膀胱癌组织中细胞的遗传异质性和分化程度有关。对其机制和细节有待进一步深入研究。     

Significance of the BTA Test in Bladder Cancer: A Multicenter Trial

Background :
The BTA test is a latex agglutination assay for the qualitative detection in the urine of analytes that are associated with bladder tumor. We compared the results of the BTA test with those of voided urine cytology (VUC) in patients with bladder cancer.
Methods :
A multicenter trial was performed at 6 institutions. A total of 132 patients with histologically diagnosed bladder cancer were enrolled. Urine samples were split for BTA and VUC testing.
Results :
The sensitivities of the BTA test and VUC were 57.6% and 37.9%, respectively; this difference was significant ( P < 0.001). The BTA test had much higher sensitivity for small, solitary, superficial tumors than did VUC.
Conclusion :
The BTA test is simple to perform, gives rapid results, and is far more sensitive than VUC for detection of bladder cancer. The BTA test has the potential to become an additional tool for detecting bladder cancer.     

Bladder filling by autologous urine production during cystometry: a urodynamic pitfall!

AIMS: The rate of autologous urine production should not have a major disturbing influence on cystometric urodynamic parameters such as first filling sensation, normal desire to void, strong desire to void, and cystometric bladder capacity. Instructions to patients and drinking behavior can have considerable impact, especially if filling cystometry is preceded by free uroflowmetry. We studied the influence of autologous urine production during filling cystometry on total bladder volume. METHODS: Urodynamic investigations performed between September of 2000 and February of 2001 were analyzed. Only those urodynamic investigations for which total bladder capacity could be calculated were taken into account (i.e., catheterization before and after cystometry and no urine loss during the investigations). RESULTS: After screening, 186 investigations were used for further analysis. Mean filled volume (external infusion plus autologous urine production) was 346 +/- 152 mL, but mean real bladder capacity (i.e., voided volume + residual urine) was 391 +/- 170 mL. In all patients, 14% extra urine was produced due to autologous urine production (mean filling rate, 6.1 mL/min). In 42% of the investigations, the real bladder capacity was more than 110% of the infused volume. In 18% of the patients, the contribution of natural bladder filling was more than 25% of the infused volume. CONCLUSIONS: Natural bladder filling plays a substantial role during filling cystometry and has a disturbing influence on calculated urodynamic parameters. Attention should be paid to patient instructions before the urodynamic investigation. The combination of free uroflowmetry followed by filling cystometry should be avoided. This avoidance is especially important if interventional studies are performed. Careful interpretation of studies depending on bladder capacity parameters is mandatory, and such parameters should be corrected for autologous bladder filling.     

人膀胱癌光动力学治疗的电镜观察

电镜观察15例光动力学治疗前后膀胱移行细胞癌的活检材料,证实此治疗对膀胱癌有显著作用。肿瘤组织内的毛细血管对光动力学作用最为敏感,照光20min后即出现明显损伤,24h后,毛细血管几乎完全坏死崩解。癌细胞的破坏出现较晚,迟于毛细血管。治疗4d后肿瘤组织水肿、出血,几全部坏死。治疗21～80d后,瘤床仍水肿并有出血及坏死物质复盖。表明血管的结构损伤与功能障碍在肿瘤光动力学治疗机理中起主要作用。     

Experimental models of reflex contractile activity in the rabbit bladder

We were able to produce two highly reproducible experimental models (in the rabbit) that demonstrated a high degree of reflex bladder contractile activity. In one model, a somatovesical reflex was induced by touching or pinching the perineal area. This reflex may be organized through a neurogenic reflex at the spinal level. In another model, rhythmic bladder contractions were produced by distal urethral constriction in the absence of bladder distension. These rhythmic contractions were thought to be due to a supraspinal reflex. In both types of contractile reflexes, intravenous administration of hexamethonium inhibited the reflex contractile activity virtually completely, intravenous atropine inhibited over 90% of the induced contractile activity, thus suggesting that these contractions were mediated reflexly through cholinergic stimulation. These two models of reflex bladder contractions should be useful for the study of hyperreflexic bladders.     

超声显像与膀胱镜对膀胱肿瘤的诊断价值

对经手术和病理证实的８３例膀胱肿瘤进行超声显像和膀胱镜检查的对比性分析。结果表明，膀胱镜对膀胱肿瘤的诊断符合率为９７．５％，略高于超声显像符合率的９５．２％；但对膀胱肿瘤的术前分期，膀胱镜检查尚存在局限性，而超声显像可弥补膀胱镜检查的不足。本文超声显像对膀胱肿瘤的术前分期准确率达８９．５％。超声显像对小于０．５ｃｍ的小膀胱肿瘤之检出率不如膀胱镜高。因此在常规检查以及对肿瘤的术前分期时，应以超声显像作为首选，同时结合膀胱镜检查，可进一步提高膀胱肿瘤的术前诊断正确率。