Abstract: A needle guide kit is provided which includes a needle guide, a retainer and a tether. The needle guide is coupled to an ultrasound device either directly or via an adapter. The needle guide has an open v-shaped slot which can receive a number of different needle sizes. The retainer can be attached to the needle guide to form a needle channel between the needle guide and retainer. Each retainer corresponds to a different needle size whereas each of the different needle guides correspond to a different trajectory for advancing the needle. The kit may also include a tether which is coupled to one of the components by the user. The tether prevents loss of one or more of the components when the components are detached or decoupled when completing the procedure.