Abstract: A protective retaining device for application to the site of an intravenous or catheter intervention system utilizing insertion means and tubing comprising an elongated sleeve means of flexible material for being received over and about a portion of the body to which an intervention system is applied. The sleeve means is positionable over the intervention site for protecting the body about and at the site of intervention and for firmly retaining the tubing in position proximate to the body. The retaining device is provided with an opening therein which is positionable over the intervention site of the body to allow inspection of the insertion means without removal or displacement of the retaining device.