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Sci Rep ; 12(1): 52, 2022 01 07.
Artículo en Inglés | MEDLINE | ID: mdl-34996918

RESUMEN

Ultrasound-guided hydrodissection with 5% dextrose in water (DW5) creates a peri-nervous compartment, separating the nerve from the neighboring anatomical structures. The aim of this randomized study was to determine the minimum volume of lidocaine 2% with epinephrine 1:200,000 required when using this technique to achieve an effective median nerve block at the elbow in 95% of patients (MEAV95). Fifty-two patients scheduled for elective hand surgery received an ultrasound-guided circumferential perineural injection of 4 ml DW5 and an injection of local anesthetic (LA) following a biased coin up-and-down sequential allocation method. A successful block was defined as a light touch completely suppressed on the two distal phalanges of the index finger within a 30-min evaluation period. The MEAV95 of lidocaine 2% with epinephrine was 4 ml [IQR 3.5-4.0]. Successful median nerve block was obtained in 38 cases (82.6%) with median onset time of 20.0 [10.0-21.2] minutes (95% CI 15-20). The analgesia duration was 248 [208-286] minutes (95% CI 222-276). Using an ultrasound-guided hydrodissection technique with DW5, the MEAV95 to block the median nerve at the elbow with 2% lidocaine with epinephrine was 4 ml [IQR 3.5-4.0]. This volume is close to that usually recommended in clinical practice.Trial registration clinicaltrials.gov. NCT02438657, Date of registration: May 8, 2015.


Asunto(s)
Anestésicos Locales/administración & dosificación , Lidocaína/administración & dosificación , Nervio Mediano/efectos de los fármacos , Bloqueo Nervioso/métodos , Ultrasonografía Intervencional/métodos , Adulto , Analgesia/métodos , Codo/inervación , Epinefrina/administración & dosificación , Femenino , Mano/cirugía , Humanos , Masculino , Nervio Mediano/diagnóstico por imagen , Persona de Mediana Edad
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