Abstract: The invention provides a needle arrangement (30) for a low-vacuum wound drainage system. The needle arrangement (30) includes a needle (32) and a needle retriever (34). The needle (32) has a sharpened, leading end (36) for piercing the skin of a patient, and a first locking formation (42) proximate the leading end of the needle. The needle retriever (34) has a second locking formation (48) for engaging the first locking formation (42) on the needle (32) when the needle retriever (34) is located over the leading end (36) of the needle (32), thereby to lock the needle retriever (34) to the needle, and a handle (52) for allowing the needle retriever (34) to be held and pulled by a user, thereby to retrieve the needle (32) from the patient.