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The investigators have recently shown that LSIB in combination with a suprascapular and a cervical plexus block is a very good alternative for arthroscopic shoulder surgery. However, the investigators believe the total volume of local anesthetic for LSIB may be reduced. For shoulder surgery there is no need to block the medial cord and the investigators therefore hypothesize a significantly lower MEV95% by applying a selective lateral and posterior cord block
The MEV for a successful block in 50% of the participants will be determined by using the staircase up-and-down method introduced by Dixon and Massey. Logistic regression and probit transformation will be applied to estimate the MEV for a successful block in 95% of the participants.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Ropivacaine | Other | Single arm intervention |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Ropivacaine | Drug | Minimum effective volume |
|
| Measure | Description | Time Frame |
|---|---|---|
| Minimum effective volume (95%) | 30 minutes |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Lars M Ytrebø, M.D Ph.D | University Hospital of North Norway | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University Hospital of North Norway | Tromsø | Troms | 9038 | Norway |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 28776638 | Result | Musso D, Flohr-Madsen S, Meknas K, Wilsgaard T, Ytrebo LM, Klaastad O. A novel combination of peripheral nerve blocks for arthroscopic shoulder surgery. Acta Anaesthesiol Scand. 2017 Oct;61(9):1192-1202. doi: 10.1111/aas.12948. Epub 2017 Aug 4. | |
| 30338518 | Derived | Musso D, Klaastad O, Wilsgaard T, Ytrebo LM. Brachial plexus block of the posterior and the lateral cord using ropivacaine 7.5 mg/mL. Acta Anaesthesiol Scand. 2019 Mar;63(3):389-395. doi: 10.1111/aas.13277. Epub 2018 Oct 18. |
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| ID | Term |
|---|---|
| D000077212 | Ropivacaine |
| ID | Term |
|---|---|
| D000813 | Anilides |
| D000577 | Amides |
| D009930 | Organic Chemicals |
| D000814 | Aniline Compounds |
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| D000588 |
| Amines |