Vagus Nerve Stimulation via Chronically Implanted Peripheral Nerve Cuff Electrodes in Rats

Samenvatting

Source: Sanchez, C. A., et al. Preparation of Peripheral Nerve Stimulation Electrodes for Chronic Implantation in Rats. J. Vis. Exp. (2020).

This video demonstrates vagus nerve stimulation in an awake rat. A rat with an implanted chronic peripheral nerve cuff electrode and trained in a lever press task is connected to a stimulus generator via an implanted head cap. The vagus nerve is stimulated immediately after each successful lever press, resulting in the expansion of the motor map.

Protocol

All procedures involving animal models have been reviewed by the local institutional animal care committee and the JoVE veterinary review board.

1. Stimulating cuff electrode fabrication

1. Prepare the cuff tubing.
   1. Using a razor blade, cut a piece of polymer tubing 2.5 mm in length. Insert forceps tips or a paper clip through the tubing and use the blade to make a slit lengthwise through the wall of the tubing on one side of the cuff.
   2. Remove the forceps from the tubing and insert a large sewing needle through the midline of the cuff, perpendicular to the long axis. Insert the needle through the slit (top) and i....

Resultaten

Figure 1: Assembly of the stimulating cuff electrodes. (A) After securing the sutures on ei.......

Materialen

Lijst van materialen gebruikt in dit artikel

Naam	Bedrijf	Catalogusnummer	Opmerkingen
Biocompatible polyurethane-based polymer tubing, 0.080" OD x 0.040" ID	Braintree Scientific	MRE080 36 FT
Dissecting microscope	AM Scopes	#SM-6T-FRL
Fine Serrated Scissors, straight, 22mm cutting edge	Fine Science Tools	#14058-09	for cutting Pt/Ir wire and suture thread
Forceps, #5 Dumont forceps, straight, 11 cm, 0.1 x 0.06 mm tip	Fine Science Tools	#11626-11
Forceps, ceramic tipped forceps, 0.3 mm x 30 mm tips	Electron Microscopy Sciences	#78127-71
Gold Pins, PCB Press Fit Socket	Mill-Max	#1001-0-15-15-30-27-04-0	or similar small pins for connecting cuff leads to headcap
Isobutane lighter	BIC	#LCP21-AST	for de-insulating Pt/Ir wire
Micro strip connector with latch, 4-pin	Omnetics	A24002-004 / PS1-04-SS-LT
Pipette tip, 10 uL	VWR	89079-464
Platinum-Iridium (90/10%) Wire, 0.001" (diameter) x 9 strands, PTFE insulated	Sigmund Cohn	10IR9/49T
Razor Blade, Single Edge, Surgical Carbon Steel No.9	VWR	#55411-050	for cutting MicroRenathane tubing
Sewing needle, ca. 4.0 cm length x 0.7 mm diameter (size 6-7)	Singer	276	Smaller needle for threading Pt/Ir wire
Sewing needle, ca. 4.5 cm length x 0.8 mm diameter (size 2-3)	Singer	276	Larger needle for pinning cuff during assembly and for threading suture
Small foam board	Juvo+/Amazon	B07C9637SJ	for fabrication platform; our dimensions are ca. 2.5" x 3.5" x 1" (L x W x H)
Solder, multicore lead-free, 0.38mm diameter	Loctite/Multicore	#796037
Soldering station	Weller	WES51	or similar soldering iron compatible with long conical tips (this part has been discontinued)
Soldering tip, long conical, 0.01" / 0.4 mm	Weller	1UNF8
Suture, nonabsorbable braided silk ,size 6/0	Fine Science tools	#18020-60
UV (405 nm) spot light	Henkel/Loctite	#2182207
UV Light Cure Adhesive 25 ml	Henkel/Loctite	AA 3106	or similar biocompatible UV cure adhesive
Wire wrapping wire, 30 AWG	Digikey	K396-ND