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| Name | Class |
|---|---|
| University of Western Ontario, Canada | OTHER |
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Epidural analgesia is the most effective form of labor pain relief. Low doses of local anesthetic (freezing solutions) in combination with opioids (narcotics) are commonly used as epidural solutions to provide pain relief. Low dose local anesthetic solutions with opioids for labor have been shown to decrease motor block (leg weakness or temporary paralysis), without affecting labor pain relief. However, onset of pain relief can be delayed with these low dose solutions. The standard epidural solution used at Victoria Hospital is a low dose of local anesthetic called bupivacaine mixed with fentanyl, an opioid, for labor epidural pain relief.
There is some evidence that the addition of more fentanyl to the epidural bolus dose of bupivacaine at the start of labor epidural analgesia can speed onset of pain relief. Both medications are safe for you and your baby.
This study will investigate whether the addition of different doses of fentanyl (20 mcg, 50 mcg and 100 mcg) to the epidural bolus dose speeds onset of pain relief.
The study hypothesis is that the onset of epidural labor analgesia will be shortest with the larger fentanyl epidural bolus.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| F20 | Active Comparator | Patients randomized to this arm of the study receive 20 mcg fentanyl and 8 mg bupivacaine as their epidural loading dose |
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| F50 | Experimental | Patients randomized to this arm of the study receive 50 mcg fentanyl with 8 mg bupivacaine as their epidural loading dose |
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| F100 | Experimental | Patients randomized to this arm of the study receive 100 mcg fentanyl and 8 mg bupivacaine as their epidural loading dose |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Fentanyl | Drug | After obtaining informed consent, patients are randomized into one of two treatment groups or a control group by a computer generated random number table. After confirmation of epidural placement following test dose administration, a loading dose of 10 ml 0.08% Bupivacaine containing 20 mcg Fentanyl is administered after adding 1.6 ml 0.9% NaCl (Sodium Chloride) in the control group (F20). |
| Measure | Description | Time Frame |
|---|---|---|
| The time, in minutes, since completion of epidural bolus to the first painless contraction | A painless contraction = verbal Numeric Pain Rating Scale less than or equal to 3/10 | Time since epidural bolus dose administration (At 1 and 5 minutes ) |
| Measure | Description | Time Frame |
|---|---|---|
| Sensory block height to ice | 30 minutes after epidural bolus dose | |
| Pruritis | Pruritus will be measured using a 4-point scale, where 0 is none, 1 is mild, 2 is moderate, and 3 is severe. | 30 minutes after epidural bolus dose |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Indu Singh | Schulich School of Medicine and Dentistry/Anaesthesia | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Victoria Hospital | London | Ontario | N6A5W9 | Canada |
IPD will not be available
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| Nausea | Nausea will be measured using a 4-point scale, where 0 is none, 1 is mild, 2 is moderate, and 3 is severe. | 30 minutes after epidural bolus dose |
| Maternal sedation | Maternal sedation will be measured using a 5-point scale where 0 is wide awake, 1 is mildly drowsy, 2 is very drowsy, 3 is asleep but rousable, and 4 is somnolent. | 30 minutes after epidural bolus dose |
| Hypotension | Hypotension is defined as a decrease in systolic blood pressure by 30% or more, or less than 90 mmHg. It is treated with intravenous ephedrine. | 30 minutes after epidural bolus dose |
| Motor block | Motor block will be assessed using a modified Bromage score (0 = ability to move hips, ankles, and knees, 1 = inability to raise extended leg, 2 = inability to flex knee, and 3 = inability to flex ankle, foot or knee). | 30 minutes after epidural bolus dose |
| Time, in minutes, from epidural bolus dose to use of patient controlled epidural demand dose | time after epidural loading dose at which patient uses Patient Controlled Epidural Analgesia administered bolus | Estimated time frame 1 hour |
| Patient satisfaction of analgesia | Patient satisfaction of analgesia will be measured using a 5-point scale where 0 is completely dissatisfied, 1 is somewhat dissatisfied, 2 is neutral, 3 is somewhat satisfied, and 4 is completely satisfied. | 30 minutes from epidural bolus dose |
| Incidence of failed analgesia | Patients who have a verbal Numeric Rating Scale score greater than 3/10 after 30 minutes of epidural bolus dose will be deemed a failure. | 30 minutes after epidural bolus dose |
| Incidence of fetal bradycardia | Estimated time frame 24 hours |
| Time, in minutes, from completion of epidural test dose to delivery | Estimated time frame 24 hours |
| Type of delivery | Estimated time frame 24 hours |
| Fetal birth weight | Estimated time frame 24 hours |
| Neonatal Apgar scores | At 1 and 5 minutes post-delivery |
| Breastfeeding | Has breastfeeding been established at 24 hours post-delivery? | 24 hours after delivery |
| ID | Term |
|---|---|
| D005283 | Fentanyl |
| ID | Term |
|---|---|
| D010880 | Piperidines |
| D006573 | Heterocyclic Compounds, 1-Ring |
| D006571 | Heterocyclic Compounds |
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