neurovascular sheath

neu·ro·vas·cu·lar sheath

fibrous tissue enveloping and binding together arteries, their accompanying veins (venae comitantes) and nerves that run together; often it is merely the adventitious tissue of the neurovascular structures but may be highly developed as a distinct fascial layer (for example, in the case of the carotid and axillary sheaths).
References in periodicals archive ?
Ultrasound was unable to identify the neurovascular sheath in the axillary region or identify the presence of septa or compartments within the sheath that could contribute to the uneven distribution of local anaesthetic within the sheath.