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| ID | Type | Description | Link |
|---|---|---|---|
| 2013-004462-33 | EudraCT Number |
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The aim of this prospective dose finding study is to estimate the minimal effective volume (ED95) for lidocaine 1.0% for filling the adductor canal when placing an adductor canal block. We will apply the Continual Reassessment Method (CRM) for estimating the ED95 and use an MRI scan to evaluate the main objective and ensure spread to the distal part of the adductor canal.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| ACB with 30 ml lidocaine 1% | Experimental | Procedure/Surgery: Adductor canal block with lidocaine 1% The Continual Reassessment Method is used to calculate the dose level consecutively for every new cohort (2 subjects) in the study. Possible dose levels are: 5, 10, 15, 20, 25 and 30 ml. |
|
| ACB with 25 ml lidocaine 1% | Experimental | Procedure/Surgery: Adductor canal block with lidocaine 1% The Continual Reassessment Method is used to calculate the dose level consecutively for every new cohort (2 subjects) in the study. Possible dose levels are: 5, 10, 15, 20, 25 and 30 ml. |
|
| ACB with 20 ml lidocaine 1% | Experimental | Procedure/Surgery: Adductor canal block with lidocaine 1% The Continual Reassessment Method is used to calculate the dose level consecutively for every new cohort (2 subjects) in the study. Possible dose levels are: 5, 10, 15, 20, 25 and 30 ml. |
|
| ACB with 15 ml lidocaine 1% | Experimental | Procedure/Surgery: Adductor canal block with lidocaine 1% The Continual Reassessment Method is used to calculate the dose level consecutively for every new cohort (2 subjects) in the study. Possible dose levels are: 5, 10, 15, 20, 25 and 30 ml. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Adductor canal block with lidocaine 1% | Procedure | US-guided adductor canal block |
|
| Measure | Description | Time Frame |
|---|---|---|
| To estimate the ED 95 for the volume needed to fill the adductor canal distally. | This will be evaluated as a binary outcome using MRI; where the adductor canal is considered to be filled if the lidocaine injectate can be identified inside the canal in the first slice distally to the insertion of the adductor longus muscle on femur. | MRI performed 15 minutes post block |
| Measure | Description | Time Frame |
|---|---|---|
| To investigate the effect of volume on proximal spread to the femoral triangle | Evaluated as a binary outcome using MRI | MRI performed 15 minutes post block |
| Quadriceps muscle strength | To investigate the effect of volume on quadriceps muscle strength, assessed as maximum voluntary isometric contraction (MVIC) and evaluated as a binary outcome (reduction by more or less than 25%). |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Pia Jaeger, MD | Department of Anaesthesia, HOC, Rigshospitalet, Denmark | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Aleris-Hamlet Hospitals Copenhagen | Søborg | 2860 | Denmark |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 26582853 | Derived | Jaeger P, Jenstrup MT, Lund J, Siersma V, Brondum V, Hilsted KL, Dahl JB. Optimal volume of local anaesthetic for adductor canal block: using the continual reassessment method to estimate ED95. Br J Anaesth. 2015 Dec;115(6):920-6. doi: 10.1093/bja/aev362. |
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| ID | Term |
|---|---|
| D008012 | Lidocaine |
| ID | Term |
|---|---|
| D000083 | Acetanilides |
| D000813 | Anilides |
| D000577 | Amides |
| D009930 | Organic Chemicals |
| D000814 |
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| ACB with 10 ml lidocaine 1% | Experimental | Procedure/Surgery: Adductor canal block with lidocaine 1% The Continual Reassessment Method is used to calculate the dose level consecutively for every new cohort (2 subjects) in the study. Possible dose levels are: 5, 10, 15, 20, 25 and 30 ml. |
|
| ACB with 5 ml lidocaine 1% | Experimental | Procedure/Surgery: Adductor canal block with lidocaine 1% The Continual Reassessment Method is used to calculate the dose level consecutively for every new cohort (2 subjects) in the study. Possible dose levels are: 5, 10, 15, 20, 25 and 30 ml. |
|
| Lidocaine | Drug |
|
| 1 hour post block |
| Pin prick test | To investigate the effect of volume on sensory block assessed by pin-prick in the saphenous innervation area and in the popliteal fossa. | 1 hour post block |
| Temperature discrimination test | To investigate the effect of volume on sensory block assessed by cold sensation using alchohol swabs, in the saphenous innervation area and in the popliteal fossa. | 1 hour post block |
| Aniline Compounds |
| D000588 | Amines |