Midnight removal of urinary catheters — Improved outcome after gynecological surgery

By convention, most indwelling urethral catheters are removed in the morning. The authors carried out a randomized prospective study of 101 patients with postoperative urethral catheters and compared midnight removal with the more usual practice of morning removal. Patients were randomized into two groups: group A (n=46) had their catheters removed at 6:00 am and group B (n=49) had their catheters removed at midnight. Six patients were excluded from the study (1 patient on distigmine and 5 with preexisting urinary tract infections). The groups were comparable in age, use of night sedation, operative procedures and incidence of postoperative urinary tract infections. Patients in group B passed urine a median of 1 hour 40 minutes earlier, with a median volume 175 ml greater than group A (P=0.012 and <0.001); 13 patients in group A subsequently required recatheterization for urinary retention, compared to only 6 patients in group B. Patients in group B were also discharged significantly earlier from hospital (median of 2 days earlier from removal of catheter) than those in group A (P=0.032). Midnight removal of indwelling catheters after gynecologic surgery significantly decreases hospitalization and improves bladder function in terms of time and volume of first void.     

Removal of short-term indwelling urethral catheters: the evidence.

OBJECTIVE: The objective of this systematic review was to determine the effect of the timing of removal of indwelling urethral catheters (IUCs) on the duration to and volume of first void, length of hospitalization, number of patients developing urinary retention and requiring recatheterization, patient satisfaction, and the percentage of IUCs removed according to the scheduled time for removal. MATERIALS AND METHODS: Published and unpublished literature in English and other languages between January 1966 and June 2002, which compared the effects of the timing of removal of short-term indwelling urethral catheters on patient outcomes, was systematically reviewed using multiple electronic databases.To determine eligibility of the trials for inclusion in the review, assessment of methodologic quality and data extraction was undertaken independently by 2 reviewers and verified by a third reviewer. Odds ratio (OR) for dichotomous data and a weighted mean difference for continuous data were calculated with 95% confidence intervals (CI). Where synthesis was inappropriate, a narrative overview has been undertaken. RESULTS: Eight randomized controlled trials were eligible for this review. When IUCs were removed at midnight, the time to first void was significantly shorter (P = .012) after gynecologic surgery and significantly longer in patients after urologic surgery and procedures. Seven trials reported that the volume of the first void was greater in patients whose IUCs were removed late at night, and this was statistically significant in 4 trials.Patients who had their IUC removed at midnight were discharged from the hospital significantly (P < .00001) earlier than those who had their IUC removed in the morning, a finding that could result in potential cost savings for hospitals. CONCLUSION: Based on the limited available evidence, this article suggests benefits in terms of patient outcomes and reduction in the length of hospitalization after midnight removal of the IUCs. Further trials should be undertaken in wider settings and on specific groups of patients to enhance generalizability.     

Duration of short-term indwelling catheters--a systematic review of the evidence.

OBJECTIVE: A systematic review on the effect of duration of catheterization on urinary retention. MATERIALS AND METHODS: Published and unpublished randomized and nonrandomized control trials from January 1966 to July 2004 comparing the effects of duration of catheterization on patient outcomes were systematically reviewed. Relative risks (RR) for dichotomous data and a weighted mean difference for continuous data were calculated with 95% confidence intervals (CI). Where synthesis was inappropriate, a narrative overview was undertaken. RESULTS: Eight trials were included. Two trials on patients following urethrotomy demonstrated no statistically significant difference in the number of patients developing restenosis, epididymitis, or urethral pain at any follow-up periods. Two trials comparing removal of the indwelling urethral catheter within 24-48 hours to usual surgical criteria after transurethral surgery demonstrated no statistically significant difference in the number of patients requiring recatheterization. However, significant reduction in the length of hospitalization was reported after removal of the indwelling urethral catheter within 24-48 hours. An increased risk of urinary tract infection was found when the catheter was removed after 48 hours. Catheter removal on day 1 compared to day 3 after vaginal or retropubic surgery demonstrated no statistically significant difference in urinary retention or urinary tract infection. CONCLUSIONS: No significant differences in patient outcome were found, but the timing of catheter removal is a balance between avoiding infection by early removal and circumventing voiding dysfunction by later removal. Shorter catheterizations appear to reduce mean length of hospital stay.     

甲状腺乳头状癌患者术前不予留置尿管效应研究

目的 减少甲状腺乳头状癌患者术后尿管相关不适感,促进康复。方法 将820例拟行全麻下甲状腺全切术的甲状腺乳头状癌患者分为对照组607例、观察组213例;对照组于全麻后留置尿管,观察组不予留置尿管。结果 观察组术后未发生尿管相关不适,对照组术后尿管相关不适发生率为87.5%;观察组术后首次下床时间显著早于对照组、睡眠质量显著高于对照组、住院时间及住院费用显著少于对照组（均P＜0.05）;两组均未发生尿路感染;对照组拔管后尿潴留重置尿管2例、观察组术后1例不能自排小便留置尿管。结论 对全麻下行甲状腺全切术的甲状腺乳头状癌患者,术前不予留置尿管可显著改善手术治疗体验,降低费用,促进康复。     

The effect of suprapubic catheterization versus transurethral catheterization after abdominal surgery on urinary tract infection: a randomized controlled trial

BACKGROUND/AIM: Transurethral catheterization is generally associated with a higher incidence of urinary tract infections than suprapubic catheterization; however, suprapubic catheterization is associated with other disadvantages such as higher costs and a more difficult technique, and at the moment there is no consensus about the use of both catheter systems. Therefore, a prospective randomized study was performed to investigate the effects of suprapubic catheterization and transurethral catheterization in patients undergoing surgery on the incidence of urinary tract infections and patient satisfaction. METHODS: Patients who underwent an elective laparotomy were randomized and received a suprapubic or transurethral catheter. The primary end point was urinary tract infection. Other parameters of urinary tract infection, as well as duration of catheterization, hospital stay, and number of recatheterizations and of relaparotomies were monitored. Treatment 'per protocol' was also analyzed after exclusion of patients receiving another catheter than randomized for. Patients were asked for their satisfaction with the catheters and complaints during and after catheterization. RESULTS: 165 patients were eligible, of whom 19 patients had to be excluded. 75 patients were allocated to receive the suprapubic catheter and 71 the transurethral catheter. There was no difference in the incidence of a urinary tract infection between the suprapubic group (n = 9/75; 12%) and the transurethral group (n = 8/71; 11%). Most patients (6/9) who developed a urinary tract infection in the suprapubic group, however, underwent recatheterization because of postoperative complications/sepsis and relaparotomy. The incidence of urinary tract infections in patients who received a suprapubic catheter and not a transurethral catheter was 3/59 (5%). The patients did not differ with respect to satisfaction and complaints. Being a men, recatheterization and duration of catheterization are risk factors. CONCLUSIONS: The incidence of a urinary tract infection between a suprapubic catheter and a transurethral catheter in patients undergoing major surgery was not different. A potential advantage of the suprapubic catheter (reduction of urinary tract infections) is probably partly negated, because transurethral catheters were used if recatheterization was indicated during the postoperative stay or due to complications.     

Suprapubic catheters: a comparison of suprapubic versus urethral catheters in the treatment of acute urinary retention

Sixty patients presenting with acute urinary retention were randomly allocated to treatment with either suprapubic or urethral catheters. An initial specimen of urine was obtained for bacteriological culture and organism count. Subsequently, repeat specimens of urine were obtained at intervals of 2 days until the catheter was removed. The results of these cultures showed that suprapubic catheters caused less urinary tract infection (P less than 0.05). In addition, suprapubic catheters were more comfortable for the patients, easier to manage and more cost-effective. In patients with suprapubic catheters, their ability to void could be assessed prior to removal of the catheter, thus avoiding the need for recatheterization. It was concluded that patients presenting with acute urinary retention should be routinely treated by drainage using suprapubic catheters.     

Does evening removal of urinary catheters shorten hospital stay among general hospital patients? A randomized controlled trial.

OBJECTIVE: Literature indicates that removing urinary catheters at midnight facilitates earlier discharge among urology patients, but the effect of evening removal on the general patient population is unknown. The objective of this study was to investigate whether removing a urinary catheter at 22.00 hours compared to 06.00 hours among a general hospital population would lead to earlier hospital discharge. DESIGN: Randomized controlled trial. SETTING AND SUBJECTS: The study was conducted in a large tertiary hospital in Brisbane, Australia. Two hundred and ten general surgical and medical patients who had an indwelling catheter as part of their routine care were included. RESULTS: Length of hospital stay after catheter removal was not significantly affected by the timing of its removal among general hospital patients: mean hours morning 186.1; mean evening 209.3, (P = .309). In a cohort of surgical patients, the hospital stay was shorter in the evening removal group (mean hours morning 186.1; mean evening 209.3), but this result was not statistically significant (P = .127). Patients in the evening group were more likely to have a longer time period between catheter removal and the first postcatheter void, mean hours morning, 3.76 vs evening, 4.89 (t = -2.59, CI - 1.99 to -0.27). Timing of removal of the urinary catheter had no effect on the volume of the first void, mean volume morning, 214.7 mL vs evening, 221.4 mL. Twenty-five (12.1%) patients were recatheterized, but the rate of recatheterization between groups was similar. There were no differences in postdischarge problems between groups. CONCLUSION: Among general hospital patients, removing an indwelling urinary catheter at 22:00 hours does not shorten the length of stay and is effective in increasing the time to first void.     

Effects of the routine change of chronic indwelling Foley catheters in persons with spinal cord injury

OBJECTIVE: To determine whether routine catheter changes have any effect on the urinary white blood cell count (WBC) and bacterial culture in asymptomatic individuals with spinal cord injury (SCI) who have indwelling Foley catheters. DESIGN: Prospective case series. SETTING: Urology and SCI outpatient departments of a rehabilitation center. SUBJECTS: Twelve asymptomatic individuals (male and female) with SCI who have chronic indwelling urethral Foley catheters that are changed routinely every month. MAIN OUTCOME MEASURES: Two sets of urinalysis and urinary culture and sensitivity from each individual, one set taken through the Foley catheter before the catheter change and another set after the catheter change. WBC, bacterial identity, and colony count were measured, and the corresponding data were compared. RESULTS: All subjects had pyuria and bacteriuria before and after the catheter change. Analysis of the data showed a statistically significant increase in WBC in the urine after the indwelling Foley catheter was changed (P = .0039). However, bacterial types and corresponding colony counts remained almost completely unchanged. CONCLUSIONS: Routine change of chronic indwelling Foley catheters in asymptomatic individuals with SCI causes a significant rise in the urinary WBC, without altering the bacterial identity or colony count. Pyuria and bacteriuria are prevalent among individuals with SCI (including those who are asymptomatic) with indwelling Foley catheters. This study suggests that urinalysis should be taken before a catheter change.     

Silver alloy coated catheters reduce catheter-associated bacteriuria

The tendency of indwelling catheters to cause urinary tract infection was evaluated in a randomised clinical study of 223 patients. A Foley catheter coated with silver alloy on both inner and outer surfaces was used in 60 patients; 60 others received a Teflonised latex Foley's catheter and the remaining 103 patients were excluded because of antibiotic treatment, diabetes, etc. There was a statistically significant difference in the incidence of catheter-associated bacteriuria (greater than 10(5) organisms/ml) in the 2 groups after 6 days' catheterisation: 6 patients with the silver coated catheter developed bacteriuria compared with 22 who had the Teflonised latex catheter. This suggests that the silver impregnated urethral catheters reduce the incidence of catheter-associated urinary tract infection.     

Acute urinary retention. Comparison of suprapubic and urethral catheterisation.

A total of 86 consecutive patients who presented to the accident and emergency department with acute urinary retention due to prostatomegaly required catheterisation; 56 received suprapubic catheters and 30 were catheterised urethrally. Both groups were followed up for 3 years. Of the 30 patients catheterised urethrally, 12 (40%) developed urinary tract infections compared with 10 (18%) urinary tract infections in the 56 patients catheterised suprapubically. Five patients (17%) in the urethral group developed urethral strictures with no strictures in the suprapubic group. Two patients catheterised urethrally developed epididymo-orchitis and 1 developed septicaemia. None of the patients with suprapubic catheters developed these complications. Furthermore, 16 patients catheterised suprapubically underwent successful trial clamping of their catheter, whereas 7 patients required recatheterisation following removal of their urethral catheters. We recommend that the use of suprapubic catheters should become the preferred initial treatment for acute urinary retention.     

Use of antimicrobials for patients undergoing prostatectomy

Our suggestions for the use of antimicrobials in patients undergoing prostatectomy are summarized in Table 2. The use of antimicrobial prophylaxis perioperatively for patients without bacteriuria remains controversial. Some authors recommend and others do not recommend antimicrobial prophylaxis. We do not recommend perioperative prophylaxis for low-risk patients without previous urinary tract infections or an indwelling urethral catheter. We do recommend that patients with risk factors that increase the rate or consequence of urinary tract infection, those with previous urinary tract infections, or those with indwelling urethral catheters, even though the urine shows no growth, receive perioperative antimicrobial prophylaxis. Antimicrobial therapy is mandatory for patients with preoperative bacteriuria. The drug must be selected according to the susceptibility of the pathogen, and the duration of treatment must be guided by the severity of the infection. At the time of catheter removal, antimicrobial prophylaxis is probably beneficial, and antimicrobial therapy is essential if bacteriuria is present prior to catheter removal. All patients must have cultures after catheter removal and antimicrobial therapy if a urinary tract infection is identified.     

老年前列腺增生患者睾丸切除姑息术后拔尿管时机的研究

目的 探讨老年前列腺增生患者睾丸切除术后拔除尿管的适宜时机.方法 将96例睾丸切除术后留置尿管的前列腺增生患者按入院时间分为三组各32例,A组患者术后2～3 d或有尿路不适即拔除尿管,B组术后7 d拔除尿管,C组术后14 d拔除尿管,观察患者排尿情况.结果 A、B、C组患者拔除尿管后排尿成功率分别为15.62%、40....     

Prophylactic efficacy of a new gentamicin-releasing urethral catheter in short-term catheterized rabbits

OBJECTIVE: To describe an indwelling urethral catheter coated with gentamicin sulphate on the inner and outer surface of the catheter, and to evaluate the efficacy and safety of this catheter in preventing catheter-associated infections in rabbits. Materials and methods Sixty rabbits were divided equally into control and experimental groups which were then subdivided equally according to the duration of catheterization (1, 3 and 5 days). Silicone-treated latex catheters were used in the control group and gentamicin-releasing catheters in the experimental group. Urine samples and surface swabs from the catheter were cultured for bacteriological assessment, and the catheter surface examined by scanning electron microscopy to structurally analyse the biofilms. RESULTS: The gentamicin-releasing catheter reduced the incidence of bacteriuria (defined as > or = 100 c.f.u./mL) after both 3 and 5 days of catheterization (eight and 10 rabbits, respectively, for the control catheter, vs two and four rabbits for the gentamicin-releasing catheter, P < 0.05). The surfaces of the gentamicin-releasing catheter were colonized less often than those of the control catheter after both 3 and 5 days (eight and 10, respectively, for the control, vs one and four for the gentamicin-releasing catheter, P < 0.05). Scanning electron microscopy showed the formation of bacterial biofilm throughout the 3-day and 5-day control catheters, but deterioration of the bacterial biofilm was visible on the surface of the gentamicin-releasing catheters. CONCLUSION: This new gentamicin-releasing catheter produced an antibacterial barrier which inhibited catheter-associated urinary tract infection with no toxicity for at least 5 days. These in vivo studies suggest that this new catheter may be useful for controlling infection, with systemic and local safety, in patients undergoing short-term indwelling urethral catheterization.     

Effects of The Routine Change of Chronic Indwelling Foley Catheters In Persons with Spinal Cord Injury

Abstract

Objective: To determine whether routine catheter changes have any effect on the urinary white blood cell count (WBC) and bacterial culture in asymptomatic individuals with spinal cord injury (SCI) who have indwelling Foley catheters.

Design: Prospective case series.

Setti11g: Urology and SCI outpatient departments of a rehabilitation center.

Subjects: Twelve asymptomatic individuals (male and female) with SCI who have chronic indwelling urethral Foley catheters that are changed routinely every month.

Main Outcome Measures: Two sets of urinalysis and urinary culture and sensitivity from each individual, one set taken through the Foley catheter before the catheter change and another set after the catheter change. WBC, bacterial identity, and colony count were measured, and the corresponding data were compared.

Results: All subjects had pyuria and bacteriuria before and after the catheter change. Analysis of the data showed a statistically significant increase in WBC in the urine after the indwelling Foley catheter was changed (P = .0039). However; bacterial types and corresponding colony counts remained almost completely unchanged.

Conclusions: Routine change of chronic indwelling Foley catheters in asymptomatic individuals with SCI causes a significant rise in the urinary WBC, without altering the bacterial identity or colony count. Pyuria and bacteriuria are prevalent among individuals with SCI (including those who are asymptomatic) with indwelling Foley catheters. This study suggests that urinalysis should be taken before a catheter change.     

Early catheter removal following transurethral prostatectomy: overnight catheterization

OBJECTIVE: Our aim was to determine the safety and feasibility of catheter removal on the first morning after transurethral prostatectomy. METHODS: Fifty-four patients who underwent transurethral prostatectomy were included in a prospective study. The decision to remove the catheters on the first morning after surgery was based on the color of the catheter effluent, absence of clots, normal vital signs and adequate urine output. Patients who voided successfully were discharged on the same day as catheter removal. RESULTS: Catheters were removed in 43 (79.6%) patients on postoperative day 1. Of these patients 40 (93%) voided successfully, however 3 of them required recatheterization due to bleeding or urinary retention. The criteria for catheter removal were not met in 11 patients and their catheters were removed on postoperative day 2 in 2 and on postoperative day 3 in 9. The mean length of hospital stay after surgery was 1.74 days for the entire group and 1.41 days for those in whom the catheter was removed on postoperative day 1. CONCLUSION: Overnight catheterization after transurethral prostatectomy seems to be a feasible approach without leading to significant morbidity in selected patients.     

Neither alpha-blocker therapy nor cystography is required before early catheter removal after radical prostatectomy

OBJECTIVE: To evaluate the success of early catheter removal from men after radical retropubic prostatectomy (RRP) without using either cystography or giving an alpha-blocker. PATIENTS AND METHODS: We retrospectively analysed 156 consecutive patients who had RRPs between June 2003 and May 2004 to determine the incidence of urinary retention after early catheter removal, with no cystogram or using an alpha-blocker. RESULTS: The mean age of the men was 60 years and 99% were clinical stage T1 or T2; 74% had their catheters removed 8 days after RRP. The incidence of urinary retention was 1.3%, and of haematuria requiring catheter replacement 2.6%. Two patients (1.3%) developed a bladder neck contracture. CONCLUSIONS: In the present study removing an indwelling catheter 1 week after RRP was safe, with a minimal risk of urinary retention or bladder neck contracture. The addition of an alpha-blocker is unlikely to reduce the already low incidence of urinary retention.     

Initial bladder management in spinal cord injury: does it make a difference?

We classified 204 patients with acute spinal cord injury into 1 of 5 groups according to the initial form of urological management. Group A patients were placed on an intermittent catheterization program within 36 hours of injury, group B received a suprapubic trocar within 36 hours of injury, group C had urethral catheters in place for more than 36 hours before intermittent catheterization was begun, group D was on indwelling urethral catheter drainage throughout the hospitalization and discharged from the hospital with indwelling catheters, and group E was placed on intermittent catheterization in a community hospital. There were no statistically significant differences among the groups in the incidence of chills and fever, rate of urinary infections (excluding group D), incidence of upper tract changes, genitourinary complications or frequency of urological procedures at 1 year after injury. We conclude that the method of initial bladder management is relatively unimportant in determining the urological prognosis after spinal cord injury.     

Feasibility of a temporary urethral stent through the striated sphincter in patients in the early phase (6 months) of spinal cord injury

OBJECTIVE: To assess the feasibility of a temporary urethral stent through the striated sphincter in patients in the early phase (before 6 months) of spinal cord injury (SCI) in a department of neurological rehabilitation. METHODS: Fourteen consecutive men with SCI with urinary retention within 6 months after SCI were prospectively treated. Thirteen patients were tetraplegic (C2 to C7) and 1 was paraplegic. All patients were managed with indwelling catheters (10) or intermittent catheterization (4). The Nissenkorn polyurethane urethral stent was inserted across the external sphincter under local anesthesia for an anticipated 4-month duration. RESULTS: No perioperative complications were encountered. Hospital mean stay at the urological department was 1.9 days (range 1-4 days). All patients had good emptying of the bladder (residual urine less than 100 ml) and were free of all types of catheterization. Five stents had to be repositioned in the first 2 weeks, 1 was removed for obstruction at 2.5 months. There was no lithiasis, no upper urinary tract alteration, no symptomatic infection nor local discomfort during follow-up. At a mean of 3.7 months after implantation, 10/14 (71.5%) patients chose sphincterotomy by permanent urethral stent and 4 had stent removal for learning of self-intermittent catheterization (3) and indwelling catheter (1). CONCLUSIONS: The temporary sphincter stent is a new, feasible and reversible technique to manage neuropathic bladder dysfunction in the early phase after SCI. A randomized study on intermittent catheterization should be conducted. It should consider patients' and nursing caregivers' evaluations.     

The role of bladder catheterization in total knee arthroplasty

The use of a urinary bladder catheter in the perioperative period for patients undergoing total knee arthroplasty is controversial. In the current study, two bladder management protocols were studied. One group of patients had an indwelling catheter inserted into the bladder before total knee arthroplasty. The other group of patients was observed and treated for urinary retention as necessary. From 1993 to 1998, 652 patients undergoing primary, unilateral total knee arthroplasty were randomized by surgeon into two groups: one group underwent preoperative insertion of an indwelling bladder catheter (306 patients), and one group (346 patients) had a catheter inserted postoperatively as necessary. Sixty-six percent (229 of 346) of these patients required catheterization (203 had indwelling catheters and 26 had intermittent straight catheters). A urinary tract infection developed in five patients (1.6%) in whom a catheter was inserted preoperatively. A urinary tract infection developed in six patients (1.7%) in whom a catheter was inserted if necessary. Five of these urinary tract infections developed in patients with delayed indwelling bladder catheters. A urinary tract infection did not develop in any patient in whom a straight catheter was inserted. There was no significant difference in the length of stay in the hospital between the two groups. The group in whom a catheter always was inserted generated $491 greater cost for total knee arthroplasty than patients in whom a catheter was inserted if necessary.     

Toxic catheters and diminished urethral blood circulation in the induction of urethral strictures

Local effects of indwelling urinary catheters are poorly characterized. Latex catheter brands of various degrees of tissue toxicity were implanted into the urethra of 27 male piglets. The systemic hemodynamic states varied from normal to hypovolemia, where the circulation changes simulated the extracorporeal perfusion used in open-heart surgery. The urethral epithelial changes caused by the catheters were studied by light ad scanning electron microscopy (SEM). The blood circulation in paraurethral tissue reacted strongly to systemic hemodynamic changes. A reduced local blood flow induced an accumulation of polymorphonuclear leucocytes in the urethral epithelium and subepithelial space in connection with implanted latex urinary catheter strips. This was not seen in normovolemic piglets. Non-toxic wholly silicone control catheter implants did not induce changes. Epithelial cell damage correlated with the tissue toxicity values of implanted catheter strips. In SEM analysis destruction of microvilli and cell membranes was also discovered in connection with a latex catheter brand regarded as non-toxic. The wholly silicone catheters did not cause any detectable changes. The observed cell damage is induced by toxic chemicals dissolving from latex catheters. Local ischemia exacerbates these toxic effects and activates complement cascade. This induces polymorphonuclear granulocyte accumulation in the damaged urethral epithelium leading to demolition and urethral fibrotization. The present findings explain the etiology of the long urethral stricture epidemics seen in open-heart surgery in the early 1980s by showing the interference between indwelling latex catheters and reduced local blood flow.