Table 1. Comparison of the custom-made (VAMP) and the commercially available vascular access ports for mice.

	VAMP (vascular access mini-port)	SoloPort MICRO®	Microport®	Penny MousePort®
Manufacturer		Instech Solomon	Braintree Scientific	Access Technologies
Size	5×13 mm	4.4×19 mm	3×7×12 mm	6.3×15.8 mm
Weight	0.2 g	1.4 g	0.7 g	1.0 g
Materials	FEP, Rubber	Steel, Silicone	Steel, Silicone	Steel, Silicone
Prices	<2 $	120 $	50 $	80 $
Repeated punctures	tested 50×27G	not declared	100×27 G	200×25 G
Dead space volume	15 µl	30 µl	10 µl	50 µl