Does Ensuring Circumferential Local Anesthetic Spread Improve the Success of Ultrasound Guided Sciatic Nerve Block at the Popliteal Fossa?
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 64
- 试验地点
- 2
- 主要终点
- Onset time of sciatic nerve blockade.
研究概览
简要总结
Current practices when performing any peripheral nerve block may or may not involve ensuring circumferential spread of local anesthetic around the nerve. Ensuring circumferential spread can involve several redirections of the needle above and below the nerve, and potentially could result in either more discomfort for the patient or an increased chance of inadvertent direct trauma to the nerve. Not ensuring spread around the nerve may result in a slower and less complete blockade. The investigators suspect that by ensuring complete spread around the nerve, the speed of block onset would be quicker because it avoids the loss due to diffusion time.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Double (Participant, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 85 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •English-speaking
- •ASA physical status I-III
- •18-85 years of age, inclusive
- •50-110 kg, inclusive
- •150 cm of height or grater
- •Scheduled for elective foot or ankle surgery
排除标准
- •Contraindications to sciatic nerve block (e.g., allergy to local anesthetics, coagulopathy, malignancy or infection in the popliteal area)
- •Significant peripheral neuropathy or neurologic disorder affecting the lower extremity
- •Contraindications to, allergies to, and/or past adverse reactions to study medications (local anesthetics, opioid analgesics)
- •History of alcohol or drug dependency/abuse
- •History of long term opioid intake
- •History of significant psychiatric conditions that may affect patient assessment
结局指标
主要结局
Onset time of sciatic nerve blockade.
时间窗: Every 5 minutes for 30 minutes after anesthetic injection
次要结局
- Block success, time required to perform block, complications/adverse events, number of needle passes, patient discomfort(24 hours)