NDLI: Ultrasound-Guided Saphenous Nerve Block in Rabbits (Oryctolagus cuniculus): A Cadaveric Study Comparing Two Injectate Volumes

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Ultrasound-Guided Saphenous Nerve Block in Rabbits (Oryctolagus cuniculus): A Cadaveric Study Comparing Two Injectate Volumes

Content Provider	MDPI
Author	Felisberto, Ricardo Flaherty, Derek Tayari, Hamaseh
Copyright Year	2022
Description	Ultrasound-guided (US-guided) loco-regional anesthesia techniques allow direct visualization and blockade of sensory nerves. The saphenous nerve (SN), a terminal branch of the femoral nerve (FN), is strictly a sensory nerve for which electrical locator devices are ineffective for localization as no effector muscle contractions can be evoked. US-guided SN block in species other than rabbits produces hind-limb analgesia without affecting FN motor function. The aims of this study were to develop a US-guided SN block technique in rabbits and to compare the spread obtained using two different dye volumes. Twelve hind-limbs from six cadavers (1.6 ± 0.1 kg) were included; after randomization, the SN block was performed on the right or left hind-limb, injecting 0.05 mL $kg^{−1}$ or 0.1 mL $kg^{−1}$ of tissue dye in lidocaine (1:50 v:v). Subsequent dissections allowed nerve staining measurements. All SNs were identified, and 17.8 ± 4.6% and 31.0 ± 8.9% of the SN length were stained using low-volume and high-volume of the dye, respectively. Regardless of the volume used, the SN was consistently stained while the motor branch of the FN was not. This US-guided technique may provide hind-limb analgesia without affecting FN motor function in rabbits undergoing mid-distal hind-limb surgeries.
Starting Page	624
e-ISSN	20762615
DOI	10.3390/ani12050624
Journal	Animals
Issue Number	5
Volume Number	12
Language	English
Publisher	MDPI
Publisher Date	2022-03-01
Access Restriction	Open
Subject Keyword	Animals Anesthesiology Loco-regional Anesthesia Analgesia Rabbit Ultrasound-guided Saphenous Nerve Block Interfascial Block
Content Type	Text
Resource Type	Article

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