Clinical trial NCT06160778: Intravenous Ketorolac Vs. Morphine In Children With Acute Abdominal Pain
Official title: Intravenous Ketorolac Vs. Morphine In Children Presenting With Acute Abdominal Pain And/or Suspected Appendicitis: A Multi-centre Non-Inferiority Randomized Controlled Trial
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: PHASE3
Conditions: Acute Pain
Abdomen, Acute
Abdominal Pain
Appendicitis
Emergencies
Child, Only
Lead sponsor: University of Calgary
Sponsor class: OTHER
Collaborators: name: Canadian Institutes of Health Research (CIHR)
First posted: 2023-12-07
Enrollment: 495
Sex: ALL
Minimum age (years): 6
Maximum age (years): 17
Standard ages: CHILD
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Two parallel interventional groups.
Primary purpose: TREATMENT

Brief summary: Appendicitis is a common condition in children 6-17 years of age, and the top reason for emergency surgery in Canada. Children with appendicitis can have very bad pain in their belly. Children often need pain medications given to them through a needle in their arm called an intravenous (IV). The most common IV pain medication is a type of opioid called morphine. We know that opioids work well to improve pain, but there are risks and side effects when taking them. There are non-opioid medications that doctors can give to patients, like ketorolac. Ketorolac helps decrease inflammation and pain and has fewer side effects when a patient takes it for a short period of time. Our past and present overuse of opioids, driven by an unproven assumption that opioids work best for pain, resulted in an Opioid Crisis and doctors are now looking for alternatives. To do this, we need to prove that there are other options to treat children's pain that are just as good as opioids, with less side effects.

The goal of our study is to discover if school aged children who arrive at the emergency department with belly pain, improve just as much with ketorolac as they do with morphine. To answer this question, we will need a very large number of patients in a study that includes several hospitals across Canada. With a flip of a coin, each participant will either get a single dose of morphine or a single dose of ketorolac. To make sure that our pain assessment is impartial, no one will know which medicine the child received except the pharmacist who prepared the medicine.

Detailed description: Background: Appendicitis, the most common surgical diagnosis in Canadian children aged 6-17 years, accounts for \~8000 admissions annually. Despite an ongoing opioid crisis, prescription narcotics remain a mainstay analgesic for children with suspected appendicitis. Ketorolac, a non-steroidal anti-inflammatory drug (NSAID), which has a safer adverse event (AE) profile than opioids, is commonly used in emergency departments (EDs) for adults; however, use in children is considered off label due to a lack of randomized trials in this patient population. We propose a multi-centre clinical trial to address this knowledge gap,informed by our team's successful pilot trial.

Specific Aim 1: To determine if administering intravenous (IV) ketorolac is non inferior to IV morphine in reducing mean pain scores in children with suspected appendicitis.

Hypothesis: IV ketorolac will be non-inferior to IV morphine

Specific Aim 2: To determine between group differences in rates of AEs. Hypothesis: IV ketorolac will be associated with less AEs than IV morphine.

Design: A randomized quadruple blind (participant, clinician, outcome assessor, investigator) parallel group double-dummy trial in 4 Canadian pediatric EDs. Eligible patients will be 6-17 years with 5-days of moderate-severe pain (vNRS ≥5 ) being investigated for suspected appendicitis, with intravenous (IV) access, will be randomized to either:

1. IV ketorolac 0.5 mg/kg up to 30 mg (intervention) + IV morphine placebo (normal saline), or
2. IV morphine 0.1 mg/kg up to 5 mg (active control) + IV ketorolac placebo (normal saline).

Primary outcome: Between-group mean difference in pain on the vNRS at 60 minutes following administration.

Safety outcome: Proportion of children experiencing AEs related to study drug administration.

Secondary Outcomes: Between-group differences: (1) pain relief as measured on vNRS at 30, 90 and 120 minutes and at 6-8 hours; (2) proportion who achieves a 2-point vNRS (minimal important difference) pain score reduction at 60 and 120 minutes; (3) proportion of patients who change their baseline pain category (vNRS: mild 0-3, moderate 4-6, severe ≥7) at each time point; (4) time to effective analgesia as measured by the time when vNRS of \<3 is achieved (5) proportion of patients requiring additional analgesia; (6) total opioids administered (i.e., morphine equivalent mg/kg within 8 hours of treatment); (7) frequency of specific types of AEs (e.g., dizziness); (8) frequency of delayed appendicitis diagnosis; and (9) Ramsay Sedation Score at 30, 60, 90 and 120 minutes.

Sample size:With a non-inferiority margin of 1.0 (50% of the minimal important difference), 600 participants would give a power of 0.9 (1- β) to establish non-inferiority of ketorolac vs. morphine (significance level α = 0.05).

Eligibility criteria: Inclusion Criteria:

1. Age 6 to 17 years
2. Abdominal pain ≤5 days duration
3. Acute abdominal pain that is being investigated (suspected) by the clinical team for appendicitis
4. Patient with IV cannula in situ or ordered
5. Currently experiencing moderate to severe abdominal pain at rest or with movement: self-reported pain score ≥5 using the verbal Numerical Rating Scale

Exclusion Criteria:

1. Previous enrollment in the trial
2. NSAID use within 3 hours and/or opioid use within 1 to 2 hours (1 hour post-IV or intra-nasal fentanyl and 2 hours post IV morphine).
3. Children who need immediate resuscitation, are hemodynamically unstable as deemed by the clinical team or have a Canadian Triage Assessment Score of 1
4. Significant caregiver and/or child cognitive impairment precluding the ability to complete study questions.
5. Chronic pain requiring daily analgesic use: confounding as response to analgesics maybe altered.
6. History of severe undiagnosed gastrointestinal bleeding requiring medical intervention, peptic or duodenal ulcer disease or inflammatory bowel disease, coagulation disorders, prior cerebrovascular bleeding, known arterio-vascular malformations. History of minor gastrointestinal bleeding from conditions such as resolved fissures, polyps or allergic colitis will not exclude patients from participating.
7. History of chronic and active interstitial kidney disease
8. History of chronic and active hepatocellular disease: ketorolac is metabolized by the liver.
9. Known or suspected pregnancy at the time of enrollment or breastfeeding females
10. Known hypersensitivity to NSAIDs or opioids.
11. Absence of a parent/guardian for children who are \<16 years of age if they are not a mature minor.
12. Inability to obtain consent due to a language barrier and the absence of language translator in person or by a phone translation service available in the ED.

Primary outcomes:
measure: Pain relief as measured on the verbal numerical rating scale
timeFrame: 60 minutes post drug administration
Secondary outcomes:
measure: Pain relief as measured on the verbal numerical rating scale
timeFrame: 30 minutes post drug administration
measure: Pain relief as measured on the verbal numerical rating scale
timeFrame: 90 minutes post drug administration
measure: Pain relief as measured on the verbal numerical rating scale
timeFrame: 120 minutes post drug administration
measure: Pain relief as measured on the verbal numerical rating scale
timeFrame: 6 hours post drug administration
measure: Pain relief as measured on the verbal numerical rating scale during the ultrasound diagnostic
timeFrame: up to 6 hours post drug administration
measure: Proportion who achieve the minimal important difference for pain relief
timeFrame: 60 minutes post drug administration
measure: Proportion who achieve the minimal important difference for pain relief
timeFrame: 120 minutes post drug administration
measure: Change in baseline pain category
timeFrame: 30 minutes post drug administration
measure: Change in baseline pain category
timeFrame: 60 minutes post drug administration
measure: Change in baseline pain category
timeFrame: 90 minutes post drug administration
measure: Change in baseline pain category
timeFrame: 120 minutes post drug administration
measure: Change in baseline pain category
timeFrame: 6 hours post drug administration
measure: Time to effective analgesia
timeFrame: up to 6 hours post drug administration
measure: Additional analgesia requirment
timeFrame: up to 6 hours post drug administration
measure: Total opioids administered
timeFrame: up to 8 hours post drug administration
measure: Ramsay sedation score
timeFrame: 30 minutes post drug administration
measure: Ramsay sedation score
timeFrame: 60 minutes post drug administration
measure: Ramsay sedation score
timeFrame: 90 minutes post drug administration
measure: Ramsay sedation score
timeFrame: 120 minutes post drug administration
measure: Adverse events per participant
timeFrame: up to 6 hours post drug administration
measure: Frequency of each specific adverse event
timeFrame: up to 6 hours post drug administration
Other outcomes:
measure: Appendix visualization on ultrasound
timeFrame: post-randomization and up to 8 hours post-intervention.
Locations:
city: Calgary
country: Canada
facility: Alberta Children's Hospital Emergency Department
state: Alberta
Study officials:
affiliation: University of Calgary
name: Mohamed Eltorki, MBChB
role: PRINCIPAL_INVESTIGATOR
References: