Electrophysiologic Effect of Injectates on Peripheral Nerve Stimulation

@article{Tsui2003ElectrophysiologicEO,
  title={Electrophysiologic Effect of Injectates on Peripheral Nerve Stimulation},
  author={B. Tsui and Alese M Wagner and B. Finucane},
  journal={Regional Anesthesia \& Pain Medicine},
  year={2003},
  volume={29},
  pages={189 - 193}
}
Background and Objectives: A small volume of local anesthetic or normal saline abolishes the muscle twitch induced by a 1ow current (0.5 mA) during electrolocation. This study examines the hypothesis that the mechanism of this phenomenon is primarily the electrophysiologic effect of the injectate on the electrical current density at the needle tip. Methods: Five pigs were studied. An insulated Tuohy needle was inserted in each pig toward the left and right brachial plexuses and the left and… Expand
The electrophysiological effect of dextrose 5% in water on single-shot peripheral nerve stimulation.
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The electrophysiological effect of a nonconducting (dextrose 5% in water, D5W) injectate on a motor response elicited by low current electrical stimulation is described. Expand
Peripheral nerve stimulation
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The basic principles needed to understand and perform regional blocks with the aid of a peripheral nerve stimulator are focused on, avoiding complications and permanently checking the equipment is recommended. Expand
[Influence of blockades with local anesthetics on the stimulation ability of a nerve by peripheral nerve stimulation. Results of a randomized study].
TLDR
The results showed that 30 s and 2 min after injection of local anesthetics there is a strong local anesthetic effect, which might occur despite the use of peripheral nerve stimulation, and the multiple injection technique in a close anatomical area has to be considered critically. Expand
Effect on Neurostimulation of Injectates Used for Perineural Space Expansion Before Placement of a Stimulating Catheter: Normal Saline Versus Dextrose 5% in Water
TLDR
The current needed to electrostimulate the femoral or sciatic nerve was higher after injection of NS than after D5W, regardless of injectate used. Expand
Dextrose 5% in water: fluid medium for maintaining electrical stimulation of peripheral nerves during stimulating catheter placement
TLDR
Three cases of continuous brachial plexus catheter placement in which Dextrose 5% in water (D5W) was used to dilate the perineural space instead of NS to elicit a motor response following a normal saline injection. Expand
No change in impedance upon intravascular injection of D5W
  • James Chin, B. Tsui
  • Medicine
  • Canadian journal of anaesthesia = Journal canadien d'anesthesie
  • 2010
TLDR
The absence of a significant increase in impedance upon injection of D5W prior to injection of local anesthetic may provide useful information to warn of intravascular injection. Expand
Pediatric Electrical Nerve Stimulation
TLDR
This chapter provides an overview of the use of nerve stimulation, including the electrophysiological principles underlying the procedure and the application of the electrical epidural stimulation test for placing epidural catheters. Expand
Electrical Impedance to Distinguish Intraneural from Extraneural Needle Placement in Porcine Nerves during Direct Exposure and Ultrasound Guidance
TLDR
With further study, EI could prove to be a quantifiable warning signal to alert clinicians to intraneural needle placement, preventing local anesthetic injection and subsequent nerve injury. Expand
Stimulating catheter and electrophysiologic effect of the flush injectates: Exciting
Cast Elevator; Zimmer Orthopedic Surgical Products, Warsaw, IN) to stabilize the leg in this elevated position. The operator manipulates both the transducer and the block needle while viewing theExpand
Reply to Drs. Tsui and Finucane
TLDR
The injection of D5W may not only circumvent the problem of electrical interference caused by the injection of saline or air bubbles but also enhance accurate needle/catheter-tip visibility as Schafhalter-Zoppoth et al.1 predicted “water” would do. Expand
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