the present invention involves an integrated double - ended needle and blood collection device assembly which is convenient to use , safely contained and ready for disposal after use . the device allows the user to expose and resheath potentially infectious needles without bringing the user &# 39 ; s fingers or hands into close proximity with sharp or broken needle tips . after removing the needle from the patient , the needle is safely resheathed by retracting the needle into the device , thereby reducing the risks of accidental needle wounds and infection . the device also serves as a holder for blood collection tubes which can be easily inserted and removed for multiple sampling .