Updated July 2026 · Hub page

The ICU Devices & Life Support Hub — Machines, Lines and the Nurses Who Run Them

Every machine in the ICU replaces a failing organ, and every one of them introduces a new set of ways the patient can be harmed. That is the honest frame for device nursing: the pump, filter, or circuit buys time, and the nurse is the safety system. This hub organizes every device guide on the site into families — the ECMO series, the mechanical circulatory support ladder, the renal replacement guides, the ventilator series, and the invasive lines — so you can read them in an order that builds.

The ECMO series

Extracorporeal membrane oxygenation is the deepest end of the pool: full lung or heart-and-lung replacement through two cannulas and a circuit that must be watched every minute. The series runs from the concept to the crisis. Start with the basics and the VV-versus-VA distinction, because every downstream decision — where oxygenated blood returns, what recirculation means, what a differential-hypoxemia picture looks like — flows from which configuration is running.

• ECMO basics — what the circuit actually does, and the vocabulary that unlocks the rest
• VV vs VA ECMO — lung support vs heart-and-lung support, and why the difference drives everything
• ECMO anticoagulation — the bleeding-versus-clotting tightrope and the labs that walk it
• ECMO circuit emergencies — chugging, chatter, air, and the drills for each
• ECMO weaning & decannulation — proving the native organs are back
• ECMO nursing as a specialty — training, staffing models, and the career angle

The mechanical circulatory support ladder

Cardiac support devices form an escalation ladder, and understanding them as a ladder — rather than as three unrelated machines — is what makes the physiology stick. The balloon pump augments a heart that still does the work; the Impella takes over part of the work; the LVAD replaces the work durably. Each rung has its own alarm logic, its own hemodynamic signature, and its own failure modes.

• IABP — timing, augmentation, and what the waveform is telling you
• Impella — position, purge fluid, and the suction alarms that mean move-the-patient-not-the-pump
• LVAD — the pulseless patient who is alive, flows, and driveline care

Renal replacement: the CRRT family

Continuous renal replacement therapy is dialysis slowed to ICU speed, and it turns the bedside nurse into the person who runs the kidney. These guides cover when CRRT is chosen over intermittent dialysis, what the nurse actually manages hour to hour, and the citrate trap that quietly locks up calcium.

• AKI & CRRT — KDIGO staging, the AEIOU indications, and the nurse's role
• CRRT deep dive — modes, dose, filters, and troubleshooting the circuit
• CRRT vs hemodialysis — why hemodynamics pick the modality
• Dialysis nursing guide — the broader renal-replacement picture

The ventilator series

The ventilator is the one life-support device nearly every ICU nurse touches every shift, and it rewards being learned as a sequence: how the initial settings are chosen, what the modes actually do, what the alarms mean, why the patient fights the machine, and how the team proves the patient no longer needs it. The weaning guides pair together — the protocol is the strategy, the spontaneous breathing trial is the daily test.

• Initial vent settings — the first hour after intubation
• Ventilator modes — volume, pressure, and support, translated
• Alarm troubleshooting — high pressure, low volume, and the DOPE drill
• Dyssynchrony — reading the fight between patient and machine
• Weaning protocol — the strategy from sedation vacation to extubation
• Spontaneous breathing trials — the daily test and how to read a failing one

Invasive monitoring: lines and waveforms

Monitoring lines are devices too, and the skill is the same: know what the number means, know when the number is lying, and know the waveform well enough to catch both. The arterial-line pair covers management and waveform reading; the PA catheter guide covers the numbers that still guide the sickest hearts.

• Arterial line management — setup, zeroing, square-wave testing, and safety
• Arterial waveform interpretation — what the shape says about the heart
• Swan-Ganz / PA catheter — pressures, wedge, and cardiac output at the bedside
• ICP monitoring & EVDs — leveling, draining, and the waveform that warns you

Where the machines take your career

Device skills are the most portable currency in critical care. The units that run this hardware — CVICU for the circulatory ladder, high-acuity MICU for CRRT and ventilators, neuro ICU for EVDs — are mapped in the ICU specialty career hub, and the CVICU career guide walks the device ladder as a career ladder. Device mastery is also exactly what CRNA programs mean when they ask for high-acuity experience — the CRNA career hub shows how to turn it into an application. And when the machine is fighting an emergency instead of maintaining an organ, the ICU emergencies library is the companion shelf.

Educational content for licensed clinicians. Always follow your facility's protocol and provider orders. Not medical advice.