CVCs are inserted using various access sites, including veins in the arm, chest, neck or groin; the choice in individual patients depends on a variety of factors such as anticipated duration of access needed (dwell time), reason for insertion and the quality and patency of venous sites available. There are 4 types of CVCs (Dougherty et al. 2015):
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Peripherally inserted central catheters (PICCs): CVCs inserted into a peripheral vein in the arm, rather than in the neck or chest. PICCs may be used for short-term access (7 to 10 days), but are more typically used in people needing intravenous access for several weeks or months. They are used in inpatient and outpatient settings.
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Non-tunnelled CVCs (referred to in this guidance as 'CVCs'): Short-term CVCs placed into a large vein near the neck, chest, or groin. Non-tunnelled CVCs are indicated for short-term access (usually 7 to 10 days) when peripheral access is impractical or in acute, urgent situations. Non-tunnelled CVCs need securing at the site of insertion.
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Tunnelled CVCs (also called Hickman lines): CVCs that are passed under the skin (tunnelled) from an insertion site near the neck or chest to a separate exit site, which helps to prevent infection and provides stability. Tunnelled CVCs are indicated for long-term access (more than 30 days). These long-term CVCs need securement for the first 2 to 4 weeks until tissue granulation around the 'cuff' of the tunnel, but after this, do not need additional securing.
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Implanted ports: CVCs placed completely under the skin, which are used for long-term therapies. Implanted ports have few complications, have minimal risk of infection and do not need securing.