尿动力学检查在前列腺增生症术前评估中的临床意义

目的探讨前列腺增生症(BPH)手术治疗前尿动力学检查的必要性。方法对166例拟行手术治疗的BPH患者的尿动力学检查结果进行分析。结果在166例患者中,125例(75.3%)证实存在膀胱出口梗阻(BOO ),25例(15.1%)为可疑BOO(BOO±),16例(9.6%)无BOO(BOO-),3组之间在最大尿流率(Qmax)、残余尿量(PVRV)、逼尿肌/外括约肌协同失调(DSD)上差异无统计意义,BOO( )组的逼尿肌不稳定(DI)、低顺应性膀胱的发生率明显高于其他两组,逼尿肌收缩力减弱(DUA)的发生率明显低于其他两组。结论尿动力学检查对诊断BPH、选择治疗方法和预测疗效有重要意义,手术治疗前应常规检查。     

Perugia urodynamic method of analysis (PUMA): a new advanced method of urodynamic analysis applied clinically and compared with other advanced methods.

AIMS: The aim of this study is to compare PUMA curves with different pathologic conditions causing bladder dysfunction in 158 men and 83 women. METHODS: PUMA results in terms of bladder outlet obstruction and detrusor contractility were compared in 92 men with benign prostatic hypertrophy (BPH) and p(ves) congruent with p(det) (i.e., p(abd) congruent with 0) with the results of the urodynamics operator's opinion, the provisional International Continence Society method, Abrams and Griffith's diagram, urethral resistence factor (URA), Sch?fer's diagram, and Watt factor. PUMA curves correlated reliably with different pathologic conditions such as obstructive BPH, orthotopic bladder, cystocele, the neurological bladder, and bladder diverticulum. Statistical analysis indicated excellent agreement between PUMA and URA; agreement with other methods was good in cases of obstruction and nonobstruction. In doubtful cases, as diagnosed by standard methods, PUMA agreed only with the Abrams and Griffith's diagram. PUMA and Wmax were in good agreement on detrusor con traction force. Agreement between PUMA and Sch?fer's diagram was excellent for patients with detrusor hypercontractility and good for patients with detrusor hypocontractility and normocontractility. PUMA is the only method applicable to women. It is easy to perform. When integrated with other diagnostic tests, it provides realistic data for diagnosis, medical or surgical therapy, and outcome.     

Changes in bladder function following a surgical alteration in outflow resistance

The changes in bladder function occurring after a surgical alteration in bladder outflow resistance were studied in 20 males undergoing transurethral prostatectomy (TURP) and in 20 females undergoing an endoscopic bladder neck suspension (EBNS). Serial cystometrograms (CMG) were performed before operation, and on alternate days after spontaneous micturition was re-established, for 5 days in the males and for 21 days in the females. CMGs were repeated at 3 months and 1 year after operation. After TURP voiding pressures (P_det) fell rapidly from a mean of 118 cm H₂O before operation to 57 cm H₂O at 5 days, with an increase in flow rate during this time from 10.5 ml/s to 24 ml/s. Detrusor instability that had been present in 14 patients resolved within 2 days in 12. There was no further significant urodynamic change over the 1-year study period. After EBNS, there was an early rise in voiding pressure (P_det rose from 26 cm H₂O before operation to 42 cm H₂O at 3 days). This continued to increase up to 21 days particularly in those patients with initial large residuals. Three patients developed detrusor instability. Flow rates were greatly reduced at first (27 ml/s before operation and 13 ml/s at 3 days), and gradually increased in line with voiding pressures, yet were still diminished 1 year after operation. The urodynamic changes following a reduction in bladder outflow resistance by TURP are immediate and sustained and unlikely to be the result of structural changes within the bladder wall. EBNS produces an increase in outflow resistance and it can be several weeks before balanced voiding is achieved, with significantly increased detrusor pressures needed to achieve complete bladder emptying at a reduced flow rate.     

下尿路梗阻性肾积水患者逼尿肌功能变化

目的：探讨下尿路梗阻性肾积水患者逼尿肌功能变化。方法：对20例（3．5－73岁）下尿路梗阻导致的肾积水组和10例（13－67岁）无肾积水的对照组进行膀胱压力容积测定与压力－流率测定，并记录不同膀胱灌注量的逼尿肌基础压力。结果：下尿路梗阻性肾积水组逼尿肌－括约肌协同失调（DSD）11例（55％），逼尿肌功能过度活跃5例；而对照组仅发现1例（10％）DSD，未发现有逼尿肌功能过度活跃。下尿路梗阻性肾积水组平均膀胱顺应性显著低于对照组（P＜0．05），而下尿路梗阻性肾积水组平均逼尿肌基础压力，平均逼尿肌最大收缩压和残余尿量均显著高于对照组（P＜0．05），且下尿路梗阻性肾积水组在灌注量逐渐增加时高逼尿肌基础压力发生率逐渐增加。结论：下尿路梗阻性肾积水多伴有逼尿肌功能异常，提示膀胱逼尿肌功能改变与下尿路梗阻性肾积水的形成及发展有一定的相关性。     

Basic study on velocity-flow urodynamics using Doppler sonography: Simultaneous detection of cavitation and Doppler signals in an artificial urethral model

BACKGROUND: We have developed velocity-flow urodynamics using Doppler sonography based on the hypothesis that microbubbles formed in the urethra are responsible for Doppler signals. In order to confirm this hypothesis derived from Bernoulli's principle, we investigated the simultaneous detection of cavitation noise and Doppler signals in an experimental system. METHODS: An experimental circuit was built in which a stenosis was created using a glass or silicon tube with tap water used as the sample fluid. Doppler signals, pressure before and after the stenosis, flow rate, flow velocity and cavitation noise were measured. Direct detection of cavitation with a high-speed charged-coupled device (CCD) camera was conducted in the glass tube. The relationship between cross-sectional area and flow velocity in terms of the detection of Doppler signals was analyzed in the silicon tube study. RESULTS: In the glass tube study, a high-speed CCD camera clearly detected masses of microbubbles associated with cavitation. The range of flow rates creating cavitation completely corresponded with those producing Doppler signals detected by ultrasonography. A similar correlation was observed in the silicon tube study, which showed that a low flow velocity of 41.5 cm/sec through a stenosis with a cross-sectional area of 20 mm(2) created Doppler signals at a flow rate of 8.3 mL/sec. CONCLUSION: The results of the present study confirmed that microbubbles created in flowing urine are responsible for Doppler signals. Measurement of velocity-flow urodynamics has great potential to become a non-invasive and reliable alternative to conventional pressure- flow urodynamic studies.     

58例脊髓损伤合并轻中度肾积水的临床分析

目的探讨脊髓损伤（SCI）肾积水的临床表现特点、发病机理和最佳治疗途径。方法对58例轻、中度脊髓损伤肾积水患者进行回顾性分析，观察肾积水缓解所需的治疗时间和复发情况。结果留置尿管、间歇导尿加药物、综合疗法3种治疗方法所需的治疗时间无差异；其中有效56例（96．55％）；3个月内复发28例（48．28％）；逼尿肌反射亢进合并括约肌痉挛（DSD）的复发率（57．14％）高于逼尿肌反射亢进者（28．57％）和低下者（14．29％）；肾积水复发与患者不能坚持治疗有关。结论SCI肾积水的病程隐匿且易复发；长期坚持间歇导尿和药物治疗能有效预防肾积水的复发。     

Hydrodynamic aspects of pyelocalyceal peristalsis

This study was undertaken to determine the nature of pressure changes in manometric studies of renal pelvis and calyces. In previous studies in pigs it has been assumed that pressure increases occur in the contracting segments of the renal pelvis and calyces, but our observations suggested that these increases were actually due to distension of noncontracted segments. Pressures were recorded with two catheters introduced percutaneously into the pyelocalyceal system with simultaneous video recording of the fluoroscopic image. There was no pressure rise in the calyces or the renal pelvis when these segments contracted; however, pressure rose when the noncontracted calyces were distended by a remote contraction ring. These findings confirmed the observations at kinetic urography. They agreed with the hydrodynamic experience that the pressure in a ring-shaped contracted segment is lower than upstream and downstream of that segment. It was concluded that if the porcine pyelocalyceal system is a valid model of the human, the pressure increases, assumed to be contractions, were actually caused by the injection and distension of the noncontracted segments.     

前列腺增生症453例尿动力学分析

目的 研究尿动力学在前列腺增生症患者的诊断和治疗中的作用。方法 对453例前列腺增生症患者实施尿动力学检测并进行尿动力学评估，为前列腺增生症患者手术治疗提供理论依据。结果 453例皆有膀胱出口梗阻（BOO），单纯（BOO）不伴明显膀胱功能障碍者215例（47．5％），不稳定膀胱86例（18．9％），低顺应性膀胱72例（15．9％），低顺应性伴不稳定膀胱24例（5．3％），逼尿肌收缩乏力77例（17．0％），逼尿肌括约肌功能失调3（0．7％）例。结论 前列腺增生症患者尿动力学检测可同时评估膀胱和尿道功能情况，为前列腺增生症患者的诊断和治疗提供可靠的理论依据。     

影响下尿路尿动力学检查准确性的因素及护理措施

笔者通过对270例患者进行尿动力学检查,认为环境、病人的配合程度、检查体位、导管的型号、膀胱灌注情况及护士操作技术、服务态度对尿动力学检查有一定的影响。针对影响因素采取护理措施:积极创造良好的检查环境,加强对患者的宣教与沟通,正确放置体位和选择导管、冲洗液的速度,操作护士熟练的技术和人性化服务,是获得准确检查结果的关键。     

良性前列腺增生症（BPH）尿动力学研究：术后排尿困难的原因分析

21例BPH手术治疗后仍有排尿困难,经内窥镜等检查不能明确原因者,19例经尿动力学检查明确了原因。其中前列腺残留8例,后尿道办膜样梗阻4例,逼尿肌/无力2例,逼尿肌尿道外括约肌协同失调3例,假性排尿困难2例。尿动力学检查对病因诊断和指导治疗均有很大的价值。