Upstairs Rumblings: "What I Wish ED Docs Knew About Central Lines”

Central venous access is not a default step for every ICU-bound patient. In emergency and critical care, the real decisions are who truly needs a central line, which site and catheter fit the physiology, and when an arterial line changes management rather than just adds risk.

Central line decisions in the ED

• Who can skip a CVL: A central line is rarely needed just for difficult access now that ultrasound-guided peripheral IVs and PICCs exist, and some patients on low-dose norepinephrine or with a short expected ICU course can often avoid one.
• Who likely needs a CVL: Crashing patients with poor access, those on high-dose or multiple vasopressors, and patients needing irritant infusions like hypertonic saline are the clearest candidates for central access.
• Catheter choice matters: Multi-lumen catheters suit patients needing several simultaneous infusions, while introducer sheaths are built for rapid fluids, blood products, or dialysis-level flow. We get into the practical selection logic in the episode.
• Site-specific tradeoffs: Subclavian has lower CLABSI rates and is often more comfortable, but it is a poor choice when bleeding risk, future dialysis access, or even a small pneumothorax would be a major problem.
• Dialysis line anatomy: For temporary dialysis access, the right IJ is generally preferred, while the left IJ is less desirable because the sharper turn into the central circulation makes the setup less favorable.
• Full sterile barrier: Maximal sterile precautions are not optional: skipping full barrier technique can raise CLABSI rates up to sixfold, and any line that was not clearly sterile may need replacement upstairs.

Arterial line indications and placement

• Who needs an A-line: Arterial monitoring is most useful when cuff pressures are unreliable, fluctuating, or falsely reassuring despite shock signs like cold extremities, elevated lactate, altered mentation, or poor urine output.
• Who does not: Not every patient with a CVL needs an arterial line; stable hemodynamics and a favorable trajectory are strong reasons to skip another invasive device.
• Radial first default: The radial artery is usually the best first site because it is fast, accessible, and carries lower infection and complication rates than more central options.
• Femoral rescue site: Femoral arterial access is especially useful during cardiac arrest, but it brings higher risks of bleeding, pseudoaneurysm, retroperitoneal hematoma, and infection. We walk through when that tradeoff is worth it in the chapter.
• Avoid double sticking: Placing a femoral arterial line and femoral central line on the same side should be avoided when possible because doubling up at one groin can increase CLABSI risk.

References:

1. Patel AR, et al. Central Line Catheters and Associated Complications: A Review. Cureus. 2019;11(5):e4717. Published 2019 May 22. PMID: 31355077
2. Raad II et al. Prevent central venous catheter-related infections by using maximal sterile barrier precautions during insertion. Infect Control Hosp Epidemiol. 1994 Apr;15(4 Pt 1):231-8. PMID: 8207189.