Ondansetron Versus Lidocaine for Preventing Pain on Propofol Injection.
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Group C (Control), Ondansetron 8 mg, Lidocaine %2 ampoule.
- Who it may be relevant to
- Registry conditions: Anesthesia Induction, Propofol Pain Injection. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Tunisia
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
Ondansetron Versus Lidocaine for Preventing Pain on Propofol Injection: a Randomized Controlled Trial.
Overview
This is a prospective, single-center, randomized, double-blind controlled trial involving patients scheduled for elective surgery requiring general anesthesia with propofol induction. Participants are randomly assigned to one of three groups: the ondansetron group (8 mg IV), the lidocaine group (40 mg IV), or the control group (0.9% normal saline placebo). Study medications are administered intravenously over 5 minutes, ending 1 minute before anesthetic induction. the goal: To assess the efficacy of intravenous ondansetron versus lidocaine and placebo in reducing the incidence and intensity of pain associated with propofol injection in patients undergoing general anesthesia.
Detailed description
This prospective, single-center, randomized, double-blind controlled trial is conducted at the operating theaters of the Mongi Slim University Hospital (Tunisia). The study aime to compare the effectiveness of intravenous ondansetron and lidocaine versus placebo in preventing pain associated with propofol injection during induction of general anesthesia.
Adult patients (ASA I-III) scheduled for elective surgery requiring propofol-based induction are randomly allocated in a 1:1:1 ratio to receive either ondansetron 8 mg, lidocaine 40 mg, or normal saline placebo before anesthesia induction. The primary outcome is the incidence of pain during propofol injection, while secondary outcomes include pain intensity, postoperative nausea and vomiting, patient satisfaction, and pain recall.
A total of 156 patients are planned for inclusion. Pain is assessed immediately after administration of an initial propofol bolus using a numerical rating scale (0-10) by a blinded observer. The study is designed to determine whether ondansetron could provide analgesic efficacy comparable to the current standard treatment, lidocaine, while also offering potential benefits related to the prevention of postoperative nausea and vomiting.
Interventions
- Drug Group C (Control)
Group C (Control): Patients receive 4 mL of 0.9% isotonic normal saline (placebo) administered intravenously over 5 minutes, ending 1 minute before anesthetic induction. - Drug Ondansetron 8 mg
Patients received 8 mg of ondansetron diluted to a total volume of 4 mL, administered intravenously over 5 minutes, ending 1 minute before anesthetic induction. - Drug Lidocaine %2 ampoule
Patients received 40 mg of lidocaine diluted with 0.9% normal saline to a total volume of 4 mL, administered intravenously over 5 minutes, ending 1 minute before anesthetic induction.
Primary outcome measures
- Incidence of pain during propofol injection [Time frame: During induction of general anesthesia]
Secondary outcome measures (4)
- Intensity of pain during propofol injection [Time frame: during the induction]
- Incidence of postoperative nausea and vomiting (PONV) [Time frame: During the first 24 hours]
- Patient satisfaction [Time frame: Two hours after surgery]
- Pain recall [Time frame: two hours after surgery]
Eligibility criteria
Inclusion criteria
- The study included patients who met all of the following criteria:
Aged 18 years or older; Classified as ASA physical status I-III (Appendix 1); Provided written informed consent to participate in the study; Scheduled for elective surgery requiring general anesthesia with propofol induction.
Exclusion criteria
- Patients were not eligible for inclusion if they:
Had received analgesics or antiemetics within 12 hours before surgery; Had communication difficulties or were unable to assess pain adequately (e.g., language barrier, dementia, impaired consciousness); Had a known allergy to ondansetron, lidocaine, or propofol; Did not receive propofol for anesthetic induction; Were pregnant or breastfeeding; Suffered from chronic pain or regularly used opioid medications; Did not have a 20-gauge intravenous catheter inserted on the dorsum of the hand; Declined participation in the study.
Patients were excluded from the study if they experienced any complication during anesthetic induction, including:
Anaphylactic shock or allergic reaction to study medications; Hemodynamic or respiratory instability.
Patients who subsequently withdrew their consent were also excluded from the study.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Triple blind
- Primary purpose
- Prevention
Study locations
Tunisia · 1 center
- Mongi Slim Hospital — Tunis
Identifiers
NCT: NCT07632144 · Propofol pain injection