Updated July 2026 · 9 min read

Central Line & CVP Management: The ICU Nurse's Guide

Part of the ICU Devices Hub — browse every related guide in one place.

Almost every ICU patient has central access, and it does two jobs at once — a highway for drugs and fluids you can't give peripherally, and a window onto the right heart. It's also the single biggest device-associated infection risk you manage. Handling it well is equal parts monitoring skill and relentless sterile discipline.

Line types and why tip position matters

You'll see non-tunneled multi-lumen catheters (internal jugular, subclavian, or femoral), PICC lines (peripherally inserted, long dwell), tunneled catheters and ports (long-term), and large-bore introducer/dialysis catheters. Whatever the type, the tip should sit in the lower SVC near the cavoatrial junction — confirmed by x-ray before use for a newly placed line. A malpositioned tip (into the RA, up the jugular, or against a wall) can cause arrhythmias, inaccurate pressures, thrombosis, or, with irritant infusions, vessel injury. Femoral lines carry higher infection and thrombosis risk and are generally avoided when alternatives exist.

Reading a CVP — and why it lies

CVP is the pressure in the SVC/right atrium, a rough surrogate for right-heart preload. To measure it with a transducer, the same rules as any hemodynamic line apply: level the transducer to the phlebostatic axis (4th intercostal space, mid-axillary line) and zero to atmosphere. Read the mean at end-expiration off the waveform (with its a, c, and v waves). A commonly cited normal is roughly 2–6 mmHg (higher on positive-pressure ventilation).

That said, CVP still has uses: sudden changes flag events (a spike with tamponade or RV failure, a drop with hemorrhage/vasodilation), and central access lets you draw ScvO2 as a marker of the oxygen supply-demand balance.

CLABSI prevention — the bundle you run every shift

Central-line-associated bloodstream infections are common, deadly, and largely preventable. The evidence-based bundle isn't just for insertion — the maintenance half is nursing's domain.

The daily necessity review is quietly the most powerful line: the surest way to prevent a CLABSI is to not have a line in.

Air embolism and other complications

Other complications: insertion-related pneumothorax/hemothorax (especially subclavian/IJ — which is why you confirm placement and lung sounds), arterial puncture, and arrhythmia; dwelling complications include thrombosis (arm swelling on a PICC), occlusion (can't flush/aspirate — assess for kinks, clamps, positional issues, and clot before assuming failure), catheter migration, and of course infection. Flush per policy with the correct technique (pulsatile flush, positive-pressure clamp sequence) to keep lumens patent.

Safe daily line care

Label lumens and know what's running where (keep vesicants/vasopressors and TPN on dedicated lumens per policy), minimize entries, keep the dressing clean/dry/intact and dated, trace every line hand-to-source before you push anything, and reconcile the number of lumens in use against what's needed. Small disciplines, repeated every shift, are what actually prevent the bad outcomes.

Bottom line

A central line is a powerful tool and a standing risk. Confirm tip position, level and zero before you trust a CVP, and read CVP as a trend inside a bigger hemodynamic picture rather than a fluid-decision oracle. Run the CLABSI bundle relentlessly — especially the daily "does this still need to be in?" question — and keep the air-embolism response ready. The line you manage flawlessly is invisible; the one you don't is a headline.

This article is general educational information for licensed clinicians and students, not medical advice or a substitute for your institution's protocols or a provider's orders. Always follow facility policy.