Non-obstetric Lower Abdominal Surgery
Conditions
Keywords
preemptive analgesia, gabapentin, morphine, lower abdominal surgery
Brief summary
This study aimed to get the information about the effectiveness of preemptive oral gabapentin 600 mg in reducing morphine requirement after non obstetric lower abdominal surgery
Detailed description
Seventy-two subjects were given informed consent before enrolling the study and randomized into two groups; gabapentin and placebo. Two hours before the incision, patients were given preemptive analgesia, either gabapentin or placebo. Non-invasive blood pressure monitor, electrocardiogram (ECG), and pulse oxymetry were set on the subjects in the operating room. General anesthesia induction was done by fentanyl 2 mcg/kg and propofol 2 mg/kg. Endotracheal tube (ETT) intubation was facilitated with atracurium 0.5 mg/kg as muscle relaxant. Maintenance was done by sevoflurane, oxygen, and compressed air. After surgery, patients were extubated until fully conscious. Patients will be transported to recovery room postoperatively. Besides paracetamol as the postoperative analgesia, we also attached patient controlled analgesia (PCA) system to patients' intravenous line using continuous ambulatory delivery device (CADD) contained morphine 1 mg/ml with settings 1 mg per requirement, interval limit within 5 minutes, maximum dose 6 mg/hour intravenously. Cumulative morphine requirement, mean visual analogue scale, and time interval after surgery to the first administration of morphine will be assessed in this study.
Interventions
DRUGGabapentin
Oral Gabapentin 600 mg
OTHERPlacebo
Oral NaCl 500 mg
Sponsors
Indonesia University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
* Male or female * Age: 18-65 years old * Weigh in range around 20% of the ideal body weight * Physical status ASA I-II * Scheduled for elective non-obstetric lower abdominal surgery with general anesthesia * Duration of surgery less than 4 hours * Patients who agreed to participate in this study and sign informed consent
Exclusion criteria
* Patients who have history of allergy or hypersensitivity to gabapentin, paracetamol, morphine, or the other opioids * Patients who consumed analgesia and NSAID less than 12 hours before surgery * Patients who experienced physical trauma less than 4 days before surgery * Patients who have contraindications to gabapentin, morphine, and paracetamol * Patients who were treated with neuraxial block or peripheral nerve block before and during surgery * Patients who have history of diabetes, severe live or renal disease * Patients who were treated with antihypertension, sedatives, hypnotics, antidepressants, and the other drugs that have effects on nervous system * Patients who have psychiatric disorders * Patients who consumed gabapentin before perioperative period * Pregnant or breastfeeding patients
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Cumulative morphine requirement within 24 hours after non obstetric lower abdominal surgery | 24 hours after surgery | Measured by total consumption of morphine on patient controlled analgesia machine |
| Pain within 24 hours after non obstetric lower abdominal surgerysurgery: visual analogue scale | 24 hours after surgery | Measured by visual analogue scale The visual analogue scale is a measurement to assess the severity of pain. In this context, the patients will be assessed by letting them point the score on a device based on their pain experiences. The minimum value is 0 and the maximum is 10. The higher the score, the more severe the pain is. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Pain within 12 hours after non obstetric lower abdominal surgerysurgery: visual analogue scale | 12 hours after surgery | Measured by visual analogue scale The visual analogue scale is a measurement to assess the severity of pain. In this context, the patients will be assessed by letting them point the score on a device based on their pain experiences. The minimum value is 0 and the maximum is 10. The higher the score, the more severe the pain is. |
| Cumulative morphine requirement within 2 hours after non obstetric lower abdominal surgery | 2 hours after surgery | Measured by total consumption of morphine on patient controlled analgesia machine |
| Pain within 2 hours after non obstetric lower abdominal surgerysurgery: visual analogue scale | 2 hours after surgery | Measured by visual analogue scale The visual analogue scale is a measurement to assess the severity of pain. In this context, the patients will be assessed by letting them point the score on a device based on their pain experiences. The minimum value is 0 and the maximum is 10. The higher the score, the more severe the pain is. |
| Cumulative morphine requirement within 12 hours after non obstetric lower abdominal surgery | 12 hours after surgery | Measured by total consumption of morphine on patient controlled analgesia machine |
| Cumulative morphine requirement within 6 hours after non obstetric lower abdominal surgery | 6 hours after surgery | Measured by total consumption of morphine on patient controlled analgesia machine |
| Pain within 6 hours after non obstetric lower abdominal surgerysurgery: visual analogue scale | 6 hours after surgery | Measured by visual analogue scale The visual analogue scale is a measurement to assess the severity of pain. In this context, the patients will be assessed by letting them point the score on a device based on their pain experiences. The minimum value is 0 and the maximum is 10. The higher the score, the more severe the pain is. |
Countries
Indonesia
Outcome results
None listed