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ISSN: 2155-6148
Journal of Anesthesia & Clinical Research
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Risk of Adverse Effects Using Antibiotic Prophylaxis in Ambulatory Cystoscopy: A Systematic Review

Herney Andrés García-Perdomo1*, Eladio Jiménez-Mejías1 and Hugo López-Ramos2
1Professor University of Valle (Colombia), Director of Cochrane Associate Group, Department of Clinical Medicine and Public Health, University of Granada, Spain
2Department of Urology, University of Rosario, Colombia
Corresponding Author : Herney Andrés García-Perdomo
Department of Clinical Medicine and Public Health
University of Granada, Spain
Tel: +57 3212195102
Received August 27, 2014; Accepted September 21, 2014; Published September 30, 2014
Citation: García-Perdomo HA, Jiménez-Mejías E, López-Ramos H (2014) Risk of Adverse Effects Using Antibiotic Prophylaxis in Ambulatory Cystoscopy: A Systematic Review. J Anesth Clin Res 5:439. doi: 10.4172/2155-6148.1000439
Copyright: 2014 García-Perdomo HA, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited..
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Objective: to determine incidence of adverse effects related to antibiotic prophylaxis compared to other interventions in patients who undergo cystoscopy with sterile urine. Methods: Search strategy (January 1980-January 2014) in Medline via PubMed, CENTRAL, and EMBASE. Additionally, we searched databases for registered trials and conference abstracts, as well as reference lists of systematic reviews and included studies. Two published randomized placebo-controlled trials (January 1, 1980 and January 31, 2014) were included in qualitative analysis with no language restrictions. Two independent reviewers collected Data. Risk of bias was evaluated with the Cochrane Collaboration recommendations. The primary outcome was incidence of adverse effects (AE).

Results: 2448 patients were found in the studies of García-Perdomo et al., and Jimenez-Cruz et al. The incidence of AE in one study was 0.7% in intervention group (nausea), no AE in control group or in the other study included. A meta-analysis was not performed.

Conclusions: There is a low incidence of adverse effects associated with antibiotic prophylaxis in cystoscopy besides we found inadequate conducting and report of this outcome in studies included.

Urinary tract infection; Cystoscopy; Antibiotic prophylaxis; Systematic review; Adverse effects.
In Urology, there are multiple indications to perform a cystoscopy, like hematuria, cancer, planning a surgery, and many others [1]. This has many advantages as a diagnostic procedure, however it also has adverse effects like urinary tract infection (UTI) which has been studied frequently in ambulatory and hospital settings, recognizing as the most common nosocomial infection nowadays [2] and it has been associated with higher morbidity for patients [3-5].
An adverse effect is defined as an unfavorable outcome occurred during or after a drug administration or other intervention has been used, with a possible causal relationship. Different definitions are found in literature but this is the one most accepted and it is fundamental to comprehend and analyze the purpose of this systematic review (SR) [6]. According to García-Perdomo et al. (Meta-analysis submitted for publication), post cystoscopy UTI is not prevented by using antibiotic prophylaxis according to low risk of bias studies, however adverse effects were not assessed.
Multiple studies suggest that there are not differences between selecting randomized or not randomized studies to obtain the best information about adverse effects (AE) [7] although others suggest that quasi-experimental and analytical studies must be selected due to they have more chance to describe adverse effects not evidenced in randomized studies [8].
The aim of this study was to determine incidence of adverse effects related to antibiotic prophylaxis compared to other interventions in patients who undergo cystoscopy with sterile urine.
This study was conducted according to the recommendations of the Cochrane Collaboration and is reported following the PRISMA Statement. The protocol was registered in the International prospective register of systematic reviews (PROSPERO): CRD 42014007341.
Eligibility criteria
• Studies: We included parallel, randomized clinical trials (RCT) conducted between January 1, 1980 and January 31, 2014. We searched for quasi-experimental and analytical studies (crosssectional, case-control and cohorts) but we did not find any. No language restrictions were imposed.
• Participants: Female and male people older than 18 years old that underwent cystoscopy with sterile urine (negative urine culture). There were no preferences in any other demographic characteristic of participants.
• Interventions: The planned interventions were: Antibiotic vs. placebo; Antibiotic vs. no intervention and Antibiotic vs. any other antibiotic (No articles were found).
• Outcomes: The primary outcome was the incidence of adverse effects in both groups.
• Exclusions: No assessment or description of adverse effects.
Information sources and search strategy
We designed a search strategy for Medline via PubMed, CENTRAL and EMBASE. The search strategy was specific for each database and included a combination of the medical subject headings and free text terms for urinary tract infection, cystoscopy and adverse effects. No language or publication status restrictions. We included articles between January 1, 1980 and January 31, 2013. The full search strategies are listed in eAppendix 1.
Other electronic sources were used to find additional studies, such as, conference abstracts, DARE, PROSPERO and database from the pharmaceutical industries. We looked for additional studies in reference lists of selected articles, contact with authors about knowledge of published or unpublished articles. The results of searches were crosschecked in order to eliminate duplicates.
Study selection
Two investigators independently and blindly screened the titles and abstracts to determine the potential usefulness of the articles. Eligibility criteria were applied to the full text articles during the final selection. When discrepancies occurred, an agreement was made to take a final decision. If they could not agree, a third reviewer made the final decision.
Data collection process
Relevant data were collected by duplicate, using a standardized data extraction sheet, which contains: study design, participants, interventions and comparators and final outcomes details. Reviewers confirmed all data entries and checked at least twice for completeness and accuracy. If some information were missing, we contacted authors in order to get data completed but never returned the communication.
Risk of Bias of adverse effects
We assessed the quality of conducting and reporting adverse effects according to recommendations of Higgins & Green, and Loke et al. We used the next questions:
On conduct
• Are definitions of reported adverse effects given?
• Were the methods used for monitoring adverse effects reported? Use of prospective or routine monitoring; spontaneous reporting; patient checklist, questionnaire or diary; systematic survey of Patients?
On reporting
• Were any patients excluded from the adverse effects analysis?
• Does the report provide numerical data by intervention group?
• Which categories of adverse effects were reported by the investigators?
Statistical Analyses
No Meta-analysis was performed due to lack of data.
Study selection
87 articles were found with the search strategies designed, after exclusions, 2 studies were included in qualitative analyses [9,10] (Figure 1).
Characteristics of included studies
2448 patients were found in the studies of García-Perdomo et al. and Jimenez-Cruz et al. Both studies measured adverse effects and the general characteristics are shown in Table 1.
The study of García-Perdomo et al., described the possible adverse effects but finally only one event was shown in the intervention group and no events were seen in control group.
The study of Jimenez-Cruz et al., described no adverse effects during the experiment in both groups.
Characteristics of excluded studies
We excluded the studies of Cam, Jimenez-Pacheco, Karmouni, Rane and Tsugawa because they did not describe adverse effects.
Risk of bias of included studies
We evaluated the quality in conduction and reporting of adverse effects of the two included studies according to the recommendations of Higgins and Green; Loke et al.
García-Perdomo et al., described the assessment of adverse effects in intervention and placebo groups both for antibiotic use and the procedure itself. It described the events that never happened such as emesis, diarrhea, headache, delirium, hallucinations, convulsions, and rash and they show how nausea was the only one that happened in intervention group (n=138). On the other side, Jimenez-Cruz et al. did not describe correctly the adverse effects, neither methodologically or in the result section. They only described there were no adverse effect in both groups (Tables 2 and 3).
Results of individual studies by outcome
Adverse effects: We noticed for this SR, how the studies of García- Perdomo et al., and Jimenez-Cruz et al., conducted and reported superficially the adverse effects during these clinical trials. We only found one adverse effect (nausea) in intervention group representing 0.7% but no evidence of AE in control group in the study of García- Perdomo et al. The study of Jimenez-Cruz et al., had not AE in both groups. Due to these results and the risk of bias assessment, an evidence synthesis (Meta-analysis) was not performed.
Adverse effects are a fundamental topic in conducting clinical trials. A real balance must be between benefits to the patients and the risks around the intervention, so physicians and patients might choose the best intervention possible. Showing only the intervention´s effectiveness might overestimate its impact [6].
Different strategies have been used to assess AE of interventions, some authors suggest its assessment in the same effectiveness´ SR however it is possible to under evaluate different kind of studies or clinical trials without AE evaluation, rarely two outcomes in the same clinical trial are assessed. This is why the Cochrane Collaboration suggests to assess AE in a separate SR, stating a clear research question, an specific search strategy and including observational analytical studies that frequently report AE of interventions [6,8]. This SR followed Cochrane´s recommendations, tried to include quasi-experiments, case-control, cohort and cross-sectional studies but only clinical trials assessing AE of this antibiotic prophylaxis in cystoscopy, even lacking well conducting and report of these.
Both studies [9,10] had poor description of methods to assess AE: there was not a detailed description about an active search strategy for AE and both just showed that no AE were found in different groups, except for one patient in intervention group in García-Perdomo et al., study. Currently, there are studies supporting that If AEs are not actively searched, the incidence showed is lower than expected, and then it is underestimated [11].
On the other side, adverse effects related to antibiotic prophylaxis are variable, about 10% of patients might show systemic symptoms like: malaise, abdominal pain, diarrhea and paresthesias [7], even some specific symptoms might present like: hypersensitivity (anaphylaxis), bronchospasm and maculo-papular eruption (Cephalosporines); cutaneous rash, nausea, vomiting, mild jaundice, headache, depressive disorder and anemia (TMP/SMX) and nauseas, vomiting, hypersensitivity, fever, leucopenia and anemia (Nitrofurantoin) [7]. The current SR is focused on presentation of AE in patients who underwent a cystoscopy and received antibiotic prophylaxis so its assessment was determined by the effectiveness evaluation although most of the AE are shown during the first 48 hours due to the hypersensitivity reaction [7]. Only one patient with nausea in intervention group using levofloxacin as prophylaxis was found in the study of [1] neither in the control group nor in the study of [2]. This finding have two main implications: the incidence of AE related to antibiotic prophylaxis is low or since their inadequate methods (conducting and report) there is an underestimation of results, then we find difficult to recommend something specific about this topic.
Additionally, clinical trials and the related adverse effects are not well-reported in general scientific literature. Right now, there are worldwide movements to promote well-reported scientific research for journals and researchers (IDEAL collaboration-Equator Network) but there is still lack of high-quality reporting [12,13]. It is important to notice that we need more research about AE of this intervention by well-designed clinical trials or analytical studies due to its implications in clinical practice.
There is a low incidence of adverse effects associated with antibiotic prophylaxis in cystoscopy however we found inadequate conducting and report of this outcome in studies included. We suggest welldeveloped clinical trials or analytical studies to assess AE correctly.
This article is part of a PhD Thesis at University of Granada (Spain). Research line: Clinical Epidemiology.

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