The Rvein™ restrainer is designed to facilitate rat tail vein injections with a sliding head mount instead of a nose cone. Unlike traditional nose cone restrainers, the head mount allows natural movement of the animal’s head while eliminating the risk of asphyxiation — a common concern during prolonged procedures.
The Rvein™ is the companion product to the Mvein™, scaled specifically for laboratory rats from. It supports loading head-first or tail-first, which prevents pulling on the rat’s tail and simplifies the workflow for the technician. The rectangular profile is particularly well suited for rats with flank tumors, making it a practical choice for xenograft studies.
Once the animal is loaded, the restrainer can be rotated 90 degrees to position the lateral tail vein at the top for injection. The sliding head mount adjusts across the full weight range without adapters or inserts. The Rvein™ is also suitable for blood sampling and blood pressure monitoring.
The Rvein™ is available in three sizes: the Rvein-S™ for rats from 150 to 250 g, the standard Rvein™ for 250 to 450 g, and the Rvein-L™ for larger animals from 450 to 650 g. All three sizes share the same sliding head mount design with no inserts or adapters required.
| Parameter | Value |
| Animal | Laboratory rat |
| Weight range | 250–450 g |
| Internal length | 13 1/2″ (343 mm) |
| Internal width | 2 1/2″ (63.5 mm) |
| Tail slot | 17/64″ (6.7 mm) |
| Head mount | Sliding, fully adjustable |
| Parameter | Value |
| Animal | Laboratory rat |
| Weight range | 150–250 g |
| Internal length | 8″ (203 mm) |
| Internal width | 1 7/8″ (47.6 mm) |
| Tail slot | 17/64″ (6.7 mm) |
| Head mount | Sliding, fully adjustable |
| Parameter | Value |
| Animal | Laboratory rat |
| Weight range | 450–650 g |
| Internal length | 17″ (432 mm) |
| Internal width | 3 1/2″ (88.9 mm) |
| Tail slot | 17/64″ (6.7 mm) |
| Head mount | Sliding, fully adjustable |
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