Central Venous Catheter — Long-Term IV Access

A central venous catheter is an intravenous line whose tip rests in the superior vena cava or right atrium, where high blood volume rapidly dilutes infused substances. CVCs include several designs: peripherally inserted central catheters (PICCs) inserted in the upper arm, non-tunnelled catheters placed in the neck or chest for short-term use, tunnelled lines (such as Hickman catheters), and totally implantable subcutaneous ports.

Constructed from biocompatible materials, CVCs may feature one or multiple lumens, enabling incompatible medications to be infused simultaneously. By delivering drugs into high-flow central veins, CVCs prevent chemical phlebitis, vascular damage, and extravasation injuries associated with peripheral administration of irritant chemotherapeutic agents.

Cancer therapy frequently requires months of continuous or repeated intravenous treatments. Relying solely on small peripheral veins can cause them to harden, collapse, or become painful. A CVC protects your veins, guarantees dependable access for critical drugs, and significantly reduces the anxiety of difficult needle sticks. Because the central line remains in place between treatments, it enables continuous infusion therapies at home. However, it requires meticulous hygienic care to prevent blood clots and line-associated infections.

A CVC is an anatomical device, so it is not evaluated as a biological marker. Instead, placement is guided and checked using imaging technologies. Bedside ultrasound guides safe insertion into the vein, and fluoroscopy or post-procedure chest radiography confirms that the catheter tip is positioned accurately in the superior vena cava. If catheter-related infection is suspected, paired blood cultures from the line and a peripheral vein are analysed.

Central venous catheters are widely used across oncology. They are essential in haematology for acute leukaemia, high-grade lymphoma, and stem cell transplants, where patients require intensive regimens, platelet transfusions, and frequent lab tests. They are also standard for gastrointestinal malignancies (such as colon, stomach, and oesophageal cancers) receiving multi-day infusion regimens, as well as breast, lung, and ovarian cancers needing protracted intravenous treatment.

Central lines make complex oncological care possible. They are mandatory for administering vesicant chemotherapies (like doxorubicin or vincristine) that could cause severe tissue necrosis if they leak into surrounding skin. CVCs also enable total parenteral nutrition (TPN) for patients unable to eat, provide reliable access during intensive conditioning therapies for bone marrow transplantation, and connect to portable elastomeric pumps for continuous outpatient chemotherapy.