Comparison of Analgesic Duration of Popliteal Block Versus Ankle Block in Patients Undergoing Forefoot Surgery
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ClinicalTrials.gov Identifier: NCT03683342 |
Recruitment Status :
Recruiting
First Posted : September 25, 2018
Last Update Posted : July 20, 2022
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Condition or disease | Intervention/treatment | Phase |
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Pain, Postoperative | Procedure: Ankle Block Procedure: Sciatic nerve block | Not Applicable |
Patients scheduled for unilateral forefoot surgery, aged over 18 years old and ASA status I-III without any contra-indications for regional anesthesia will be enrolled.
After a standard randomisation, patients will be allocated in either of two groups : ankle block or sciatic nerve block at the popliteal fossa. In both groups the patients will have a multimodal analgesic regimen followed by a patient-controlled-analgesia (PCA) of morphine.
The primary endpoint is the analgesic duration, defined by the time between the end of the block procedure and the first IV request of morphine from a PCA.
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 60 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Triple (Care Provider, Investigator, Outcomes Assessor) |
Primary Purpose: | Other |
Official Title: | Comparison of Analgesic Duration of Popliteal Block Versus Ankle Block in Patients Undergoing Forefoot Surgery |
Actual Study Start Date : | September 20, 2018 |
Estimated Primary Completion Date : | December 30, 2022 |
Estimated Study Completion Date : | December 30, 2022 |
Arm | Intervention/treatment |
---|---|
Active Comparator: Ankle Block
Ankle block will be performed under ultrasound guidance.
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Procedure: Ankle Block
Ankle block will be performed prior to surgery under ultrasound guidance |
Active Comparator: Popliteal sciatic nerve block (PSNB)
PSNB will be performed under ultrasound guidance, along with a saphenous nerve block at the ankle
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Procedure: Sciatic nerve block
Sciatic nerve block will be performed prior to surgery under ultrasound guidance |
- Duration of analgesia [ Time Frame: 24 hours after surgery ]Time elapsed between block procedure and first iv request of morphine from PCA
- Total opioid consumption at 24h postoperatively [ Time Frame: 24 hours after surgery ]Total consumption of morphine from PCA at 24 postoperative hours
- Pain score at rest at 4 postoperative hours [ Time Frame: 4 hours after surgery ]Pain score (visual analog scale, 0 = minimum; 10 = maximum)
- Pain score on movement at 4 postoperative hours [ Time Frame: 4 hours after surgery ]Pain score (visual analog scale, 0 = minimum; 10 = maximum)
- Pain score at rest at 12 postoperative hours [ Time Frame: 12 hours after surgery ]Pain score (visual analog scale, 0 = minimum; 10 = maximum)
- Pain score on movement at 12 postoperative hours [ Time Frame: 12 hours after surgery ]Pain score (visual analog scale, 0 = minimum; 10 = maximum)
- Pain score at rest at 24 postoperative hours [ Time Frame: 24 hours after surgery ]Pain score (visual analog scale, 0 = minimum; 10 = maximum)
- Pain score on movement at 24 postoperative hours [ Time Frame: 24 hours after surgery ]Pain score (visual analog scale, 0 = minimum; 10 = maximum)
- Block success rate [ Time Frame: 45 minutes after block procedure ]Success of block assessed by pinprick test
- Global patient satisfaction 48h after surgery [ Time Frame: 48 hours after surgery ]Patient satisfaction score (visual analog scale, 0 = minimum; 10 = maximum)
- Complications after block [ Time Frame: 48 hours after surgery ]Report of any intravascular injection or any sensory/motor anomalies
- Rate of neuropathic pain [ Time Frame: 4-6 weeks postoperatively ]Rate of patients describing neuropathic pain 4-6 weeks postoperatively
- Rate of paresthesia [ Time Frame: Up to 24 hours after block procedure ]Rate of patients complaining of paresthesia
- Block procedure time [ Time Frame: Up to 10 minutes after ultrasound scanning ]Time from first ultrasound image to needle withdrawal

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Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Patients who are going to undergo a unilateral forefoot surgery ;
- ASA I-III ;
- Aged 18 years or more;
- Weighing at least 45 kg
Exclusion Criteria:
- Patient refusal and/or language/cognitive barrier
- Pregnancy
- Contra-indication for regional anesthesia
- Opiate or alcohol dependency
- Concomitant oncological disease with chemotherapy
- Patients suffering from neuropathic pain

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03683342
Contact: Eric Albrecht, PD Dr | +41 79 556 63 41 | eric.albrecht@chuv.ch |
Switzerland | |
Centre Hospitalier Universitaire Vaudois and University of Lausanne | Recruiting |
Lausanne, Vaud, Switzerland, 1011 | |
Contact: Eric Albrecht, PD Dr +41795566341 eric.albrecht@chuv.ch |
Principal Investigator: | Eric Albrecht, PD Dr | Centre Hospitalier Universitaire Vaudois |
Responsible Party: | Eric Albrecht, Program director of regional anesthesia, Centre Hospitalier Universitaire Vaudois |
ClinicalTrials.gov Identifier: | NCT03683342 |
Other Study ID Numbers: |
CER-VD 2018-01090 |
First Posted: | September 25, 2018 Key Record Dates |
Last Update Posted: | July 20, 2022 |
Last Verified: | July 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | No |
Pain, Postoperative Postoperative Complications Pathologic Processes Pain Neurologic Manifestations |