Increasing Nonsteroidal Anti-inflammatory Drugs and Reducing Opioids or Paracetamol in the Management of Acute Renal Colic: Based on Three-Stage Study Design of Network Meta-Analysis of Randomized Controlled Trials

Obstructive uropathy: Overview of the pathogenesis, etiology and management of a prevalent cause of acute kidney injury

Obstructive uropathy is defined as the structural or functional interruption of urinary outflow at any level in the urinary tract. It is regarded as one of the most prevalent causes of acute kidney injury (AKI), accounting for 5%-10% of cases. Acute severe obstruction of the urinary tract is a potentially threatening situation for the kidneys and therefore requires prompt identification and management to relieve obstruction. The aim of the present article is to review and synthesize available evidence on obstructive uropathy, providing a clinical guideline for clinicians. A literature review on obstructive uropathy in the context of AKI was performed, focusing on the least clarified aspects regarding diagnosis and management. Recent literature searching was conducted in English and top-level evidence articles including systematic reviews, metanalyses and large series were prioritized. Acute obstruction of the urinary tract is a diagnostic and therapeutical challenge that may lead to important clinical complications together with direct structural and hemodynamic damage to the kidney. Early recognition of the leading cause and its exact location is essential to ensure prompt urinary drainage together with the most suitable drainage technique selection. A multidisciplinary approach, including urologists, nephrologists, and other medical specialties, is best suited to correctly manage concomitant hemodynamic changes, fluid and electrolyte imbalances, and other related issues. Obstructive uropathy is one of the leading causes of AKI. Recognition of patients suitable for early diversion and feasibility or adequate selection of the indicated technique is sometimes challenging. A thorough understanding of the physiopathology behind the development of urinary obstruction is vital for correct diagnosis and management.

2022 Recommendations of the AFU Lithiasis Committee: Management of symptomatic urinary stones

The acute situation, caused by an obstructive stone, is defined by a renal colic that may be uncomplicated, complicated, or at risk in specific conditions. Its management may be medical or require interventional treatment by extracorporeal shockwave lithotripsy, endoscopic removal, or ureteroscopy. METHODOLOGY: These recommendations were developed using two methods, the Clinical Practice Recommendations (CPR) and the ADAPTE method, in function of whether the question was considered in the European Association of Urology (EAU) recommendations (https://uroweb.org/guidelines/urolithiasis) [EAU Guidelines on urolithiasis. 2022] and whether they could be adapted to the French context.

Comparison of acetaminophen, ketamine, or ketorolac versus morphine in the treatment of acute renal colic: A network meta-analysis

BACKGROUND

Renal colic is a disease in which a calculus obstructs the urinary tract, resulting in severe pain do ureteric peristaltic movements. Other symptoms, such as hematuria, nausea, and vomiting, may accompany the pain. This network meta-analysis aimed to compare the efficacy and safety of different analgesic agents for the treatment of acute renal colic.

METHODS

Medline, Embase, and CENTRAL databases were searched. Randomized controlled trials (RCTs) that compared different analgesic agents, either alone or in combination were included. For the management of acute renal colic, analgesic agents were selected based on the current standard medical practice. The medications included intravenous acetaminophen, ketamine, ketorolac, and morphine. This study sought to evaluate the pain score on the visual analog scale (VAS) at 15, 30, and 60 min; adverse events; and the utilization of rescue therapy. The efficacy of different analgesic agents was explored through a frequentist network meta-analysis using the Netmeta statistical package in R software. All treatments were ranked using the Netrank function, yielding P-scores.

RESULTS

Twelve RCTs were deemed eligible. As per the P-scores, acetaminophen was the most effective in reducing pain score at 15 min (P-score = 0.74). Ketorolac was the most effective in reducing the pain score at 30 and 60 min (P-score = 0.84) (P-score = 0.99), whereas morphine was the least effective (P-score = 0.07). Moreover, morphine was correlated with the highest odds of adverse events after treatment (P-score = 0.89). Morphine was the most frequently required rescue therapy in cases of suboptimal pain relief (P-score = 0.96).

CONCLUSION

This network meta-analysis demonstrated that ketorolac and acetaminophen were the most effective analgesic agents according to the pain score. Morphine showed the highest adverse event profile and the highest rate at which rescue therapy was required for the management of acute renal colic.

[Choice of medical treatment for renal colic: A survey of Chinese urologists]

OBJECTIVE

To investigate the status quo of recognition and management of renal colic among urological surgeons in China.

METHODS

From November 2021 to March 2022, 725 urological surgeons in China were surveyed in the form of a questionnaire, including their province, hospital grade, professional title, the number of patients with renal colic treated per week, the preferred drugs and the cognition of the disease. This study was approved by the Medical Ethics Committee of Peking University People's Hospital, and all respondents completed informed consent online.

RESULTS

During November 2021 and March 2022, urological surgeons across China were surveyed in the form of a questionnaire, and the reliability and validity of the questionnaire were verified before the study was carried out. In the study, 720 valid questionnaires were collected (accounting for 99.31% of the total number), in which 42.4% of the doctors' preferred drugs were non-steroidal anti-inflammatory drugs (NSAIDs), and 40.0% of the doctors' preferred antispasmodic drugs. Opioids were the first choice of 11.0% of the physicians and other treatments were preferred by 6.6% of physicians. In addition, 61.1% of the doctors thought that the mechanism of renal colic was elevated prostaglandin, 32.2% thought it was ureteral spasm, 5.0% thought it was calculi irritation, and 1.7% thought the mechanism was unclear. The doctor of the cognition of the generation mechanism of renal colic pain had a significant influence on the preferred treatment option (χ2=54.399, P < 0.001) that the "elevated prostaglandins" doctor more often preferred NSAIDs than the doctor who thought cramps and ureter stones caused renal colic (51.6% vs. 28.0%, χ2=34.356, P < 0.001;51.6% vs. 19.4%, χ2=13.759, P < 0.001). In addition, hospital class, physician title, and the number of weekly consultations by physicians influenced the choice of medications for renal colic (P < 0.05), tertiary hospitals, middle and senior professional titles and weekly patients with renal colic > 8 cases generally preferred NSAIDs.

CONCLUSION

There are deficiencies in the cognition and drug treatment of renal colic among urological surgeons in China. The choice of the preferred drug was related to the doctor's cognition of the disease, the grade of the hospital, the doctor's professional title and the weekly treatment volume.

Methodology and findings of randomized clinical trials on pharmacologic and non-pharmacologic interventions to treat renal colic pain - a review

Introduction

Renal colic pain is considered one of the most excruciating pains ever experienced and ranks as one of the most common urological emergencies. Despite existing established recommendations, new therapies and their combinations are continuously being tested. The aim of this systematic review is to analyze and compare studies involving pharmacologic and non-pharmacologic interventions used in the treatment of renal colic pain.

Material and methods

This systematic review was conducted following the guidelines outlined in the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) statement. Medline, Scopus, Cochrane Library, and Google Scholar were searched for relevant randomized controlled trials (RCTs) involving adult patients. The quality and results of the included studies were assessed and discussed.

Results

This review provides an extensive analysis of 71 identified RCTs. Opioids, nonsteroidal anti-inflammatory drugs (NSAIDs), acetaminophen, and dipyrone/metamizole have demonstrated effectiveness as single medications. Some evidence points to opioids having a potential disadvantage compared to others when used as a first-line single medication. Among the 63 studies exploring pharmacological therapy, 51 reported opioids utilization for rescue therapy in significant proportion of patients. Promising combination therapies involve the administration of an NSAID alongside opioids, ketamine, desmopressin, steroids, or nitric oxide. Conversely, spasmolytics, magnesium, and lidocaine exhibited limited or no additional effect. Noteworthy methodological shortcomings encompass a low pain threshold during participant recruitment and the reliance on pain reduction rather than complete pain elimination as an endpoint.

Conclusions

Frequent use of opioids as rescue medications in RCTs undermine their conclusions on effectiness of other therapeutics. Combination therapies should be considered as first choice in renal colic pain management. RCTs should define success of therapy as achieving complete or near-complete pain relief rather than pain reduction.

Effects of adding oral clonidine to standard treatments on pain intensity of patients with acute renal colic: A randomized clinical trial

Background:

The aim of this study was to compare the effect of adding oral clonidine to standard treatments on pain intensity in patients with acute renal colic.

Materials and Methods:

This is a randomized clinical trial that was performed in 2020 in Isfahan. The study population consisted of 200 patients with renal colic. Pain of the patients was assessed using Visual Analog Scale. Patients were then randomized into 4 groups of 50 patients. Group A received 0.1 mg/kg morphine and clonidine tablets (0.2 mg). Group B received morphine and placebo. Group C received 30 mg ketorolac and clonidine tablets. Group D received 30 mg ketorolac and placebo tablets. Pain of patients was assessed. 0.05 mg/kg morphine was administered and repeated every 40 min if the pain was not reduced.

Results:

Our data showed that there was a significant difference between pains of patient by the time of admission in groups (P = 0.04). However, no significant differences were observed between pains of patients in different measuring times (P > 0.05). Using general linear model, we showed that the decreases in pain scores of each group were significant (P < 0.05) but there were no significant differences in pains of patients in different measuring times (P > 0.05). Our data showed that Group A and Group C had lowest frequencies of morphine administrations while Groups B and D had the highest frequencies (P < 0.001).

Conclusion:

We showed that administration of clonidine in patients with renal colic resulted in better pain control and lower morphine injections.

Intravenous morphine plus ibuprofen or ketorolac versus intravenous morphine alone in reducing renal colic pain intensity in emergency department: A randomized, double-blind clinical trial

OBJECTIVES:

This study aimed to compare the efficacy of intravenous (IV) morphine plus ibuprofen or ketorolac versus IV morphine alone in controlling renal colic pain in the emergency department.

METHODS:

This double-blind, randomized clinical trial was conducted during November 2018 and March 2019 in Iran. Patients aged 18–65 years with acute renal colic and numerical rating scale (NRS) score of higher than 6 of 10 were enrolled to the study. They were randomly assigned to I, K, and control groups receiving 5 mg morphine with 800 mg ibuprofen (n = 65), 5 mg morphine with 30 mg ketorolac (n = 65), or only 5 mg morphine (n = 65) intravenously, respectively. NRS was evaluated 0, 15, 30, 60, and 120 min after injection.

RESULTS:

A total of 195 participants took part in the study. The presence of stone in pelvis area was higher in I group (P = 0.027). The mean rescue analgesic dose was higher in the control group and lower in K group (P = 0.031). From the 15^th min, the NRS reduction in I and K group was higher than the control group (P < 0.001), but the difference between I and K group was not statistically significant in total (P = 1.0) or in the all follow-up time intervals (15^thP = 0.864, 30^thP = 0.493, 60^thP = 0.493, and 120^th min P = 1.0). The largest difference in pain reduction was observed in 120^th min and mean of NRS was 2.9 (95% confidence interval [CI]: 2.6–3.3), 2.9 (95% CI: 2.6–3.3) and 7.0 (95% CI: 6.7–7.4) in I, K and control group, respectively. The adverse effects showed in 18.5%, 20.0%, and 13.8% of I, K, and control group, respectively.

CONCLUSION:

IV ibuprofen plus morphine and IV ketorolac plus morphine had similar effects in reducing renal colic pain but were more effective than IV morphine alone.

[Renal colic: How to calm and optimize the stone expulsion? Which treatment for pregnant women and children?]

INTRODUCTION

The aims of this narrative review was to report on the contemporary data of renal colic (RC) in terms of epidemiology and pressure on emergency structures and also to describe the latest therapeutic developments about uncomplicated RC, depending on the pediatric, adult and pregnancy population.

MATERIAL AND METHODS

A request to the health surveillance network for emergencies and deaths (SurSaUD®, Santé Publique France) revealed original data on the contemporary epidemiology of renal colic. A narrative synthesis of the articles (French, English) available on the Pubmed database was produced in June 2021.

RESULTS

Renal colic represents 1.1% of the annual total of emergency room visits. The mean age at admission was 45 years and 62% of patients were men. NSAIDs and Paracetamol are the most effective analgesic treatments and should be given priority over opioids. Non-drug analgesic treatments by tactile stimulation probably have a place in the CN management, particularly in case of contraindications. Among the validated treatments, alphablockers allow better expulsion when the stone is located in the pelvic ureter and if its size is between 5 and 10mm in diameter. In pregnant women, the predominant problem is to confirm the diagnostic. If there is a strong suspicion, MRI or a low-dose CT scan is possible. Ureteroscopy is feasible in particular in the first part of pregnancy to avoid iterative ureteral catheter changes. The care for children is now based on that of adults.

CONCLUSION

The renal colic care pathway in 2021 can benefit from various optimizations in the field of expulsion and analgesic treatments. Good knowledge of the specific situations in pregnant women and children allowing to improve the quality of care.

Parecoxib Vs Paracetamol for Treatment of Acute Renal Colic Due to Ureteric Calculi: A Randomized Controlled Trial

OBJECTIVE

To compare efficacy and safety of parecoxib and paracetamol for treatment of acute renal colic due to ureteric stones.

MATERIALS AND METHODS

A randomized, double blinded, controlled trial included adult patients presented to emergency department with acute renal colic due to ureteric calculi between June 2019 and August 2020. Patients with hypersensitivity to either drug, peptic ulcer, coronary ischemia, peripheral vascular or cerebrovascular disease, hepatic impairment (Child-Pugh score >10) or chronic kidney disease stage 4 or 5 were excluded. Eligible patients were randomized to group 1 who received 1g intravenous Paracetamol infusion or group 2 who received 40mg intravenous Parecoxib infusion. Pain analogue score was evaluated before treatment and 30 minutes afterwards. The primary endpoint was the need for rescue analgesia for persistent pain. Safety was evaluated by the incidence of adverse events.

RESULTS

The study included 203 patients (102 in group 1 and 101 in group 2). Pretreatment patients' data were comparable for both groups. The mean pain analogue score decrease from 7.6 to 3.8 in paracetamol group (P <.001) and from 7.8 to 3.4 in parecoxib group (P <.001). Rescue analgesia were needed in 36 patients (35.3%) in paracetamol group and 27 patients (26.7%) in parecoxib group (P = .187). Minor adverse events developed in 2 patients (2%) in paracetamol group and 3 patients (3%) in parecoxib group (P=0.683).

CONCLUSION

Paracetamol and Parecoxib were effective for treatment for patient with acute renal colic. Both treatments showed comparable results in reduction of pain and need for rescue analgesia with minimal adverse events.

Intravenous magnesium sulfate vs. morphine sulfate in relieving renal colic: A randomized clinical trial

OBJECTIVE

Renal colic emerging from renal stone is virtually the most severe pain which is experienced. Intravenous infusion of morphine sulfate is known as a usual treatment for the disease. This study was designed to compare the efficacy of magnesium sulfate vs morphine sulfate in renal colic relief as for analgesic effect as well as lack of morphine sulfate side effects when using magnesium sulfate.

METHODS

We conducted a double-blind randomized clinical trial in renal colic patients who had referred to the emergency department of Shahid Sadoughi Hospital in Yazd, Iran. A total of 80 eligible patients were selected and randomly assigned into two groups; patients in the case group received 50 mg/kg intravenous magnesium sulfate, and those in the control group 0.1 mg/kg intravenous morphine. The primary outcome was the pain score measured on a numerical rating scale at 0, 10 and 20 minutes after infusion. Data were analyzed using SPSS₁₆.

RESULTS

The two groups were similar in terms of demographic features and pain intensity at the time of referral (P <.0001). Ten minutes after drug administration, the pain mean score in the morphine group leveled at 4.88, and in the magnesium group 5.70, which proved to be greater in the morphine group (P- = 0.06). However, the pain mean score turned out to be 3.65 in the morphine group and 3.20 in the magnesium group thus significantly indifferent (P = .48).

CONCLUSIONS

In this study, we concluded that administration of intravenous 50 mg/kg magnesium sulfate could be as effective as morphine in reducing renal colic without any further complications.

Intradermal sterile water injection versus diclofenac sodium in acute renal colic pain: A randomized controlled trial

OBJECTIVES

We aimed to evaluate the efficacy of intracutaneous sterile water injection (ISWI) to relieve the pain of acute renal colic compared with diclofenac and placebo.

METHODS

The study included 150 patients presented to the Emergency Department with renal colic randomized into 3 groups: control group received intracutaneous injections of 0.5 cm³ isotonic saline in the flank, group A received intracutaneous injections of 0.5 cm³ ISWI in the flank, and group B received an intramuscular injection of 75 mg Diclofenac in the gluteal region. The severity of the pain was assessed by a visual analogue scale system at baseline and 30, 45 min, and 60 min after injections. Subjects with inadequate pain relief at 1 h received rescue analgesia.

RESULTS

The mean baseline pain score was 9.6 ± 0.61 in the ISWI group, 9.72 ± 0.64 in the diclofenac group and 9.26 ± 0.89 in the control group. The mean pain score at 30 min of the control group was reduced to 6.9 ± 1.56. This mean at 30 min after ISWI and diclofenac injections were reduced to 1.98 ± 1.41 and 1.88 ± 1.19 respectively. The mean of pain sore of the ISWI and diclofenac group at 45 and 60 min was constant. Rescue analgesics at 1 h were required by 47 patients receiving the saline injection and by 4 patients and by 7 patients receiving ISWI and diclofenac injection respectively.

CONCLUSIONS

ISWI and diclofenac were equally effective for the pain relief of acute renal colic.