A single step body insertion device comprises a cannula 101 and a Veress needle 102 which penetrates the skin surface and relevant tissue layers to reach fluid and/or gases that need to be removed from the body. The cannula shaft 105 and tapered tip 106 are of a polymeric material which is flexible and kink resistant. The Veress needle 102 has an engagement feature 120 for engagement with the tapered tip 106 of the cannula for delivery of the cannula 101 into the body as the Veress needle 102 is inserted into the body. The device is used for the management of conditions such as pneumothoraxes and pleural effusions as well as other conditions that require release of fluid and/or gas from the body.
