ICU Treatments: Standard of Care and The Ventilator

The ICU team uses a set of evidence-based “standard of care” treatments designed to protect the lungs while the body works to heal. When a person has ARDS, their lungs are incredibly fragile. Standard treatments focus on supporting breathing without causing further injury, managing fluids carefully, and using medications to ensure the patient is “synced” with the medical equipment.

Lung-Protective Ventilation: Gentle Breaths

In the past, ventilators were often set to deliver large, deep breaths. However, we now know that ARDS lungs are “small” because many of the tiny air sacs are filled with fluid and cannot hold air. Large breaths can overstretch the healthy parts of the lung, causing ventilator-induced lung injury (VILI) ^[1][2].

To prevent this, doctors use Lung-Protective Ventilation (LPV). The key features include:

• Low Tidal Volume: The ventilator is set to deliver smaller, gentler breaths (roughly 6 mL for every kg of the patient’s predicted body weight) ^[1][3].
• Limiting Pressure: Doctors monitor driving pressure—the amount of force needed to push air into the lungs. Keeping this pressure low is critical for survival ^[4][5].
• Preventing “Atelectrauma”: By using smaller breaths and steady pressure (PEEP), doctors prevent the air sacs from repeatedly snapping open and shut, which can tear the lung tissue ^[6][7].

Conservative Fluid Management: Keeping the Lungs “Dry”

When the lungs are injured, they act like a leaky sponge, soaking up fluid from the bloodstream. This extra fluid makes the lungs heavy and stiff, making it even harder for oxygen to get through ^[8].

The medical team often uses a conservative fluid strategy, sometimes called “keeping the patient dry.” When patients are first admitted, they often receive life-saving IV fluids, which can make them look noticeably swollen or “puffy” (peripheral edema). It is alarming to see, but the medical team uses medications called diuretics to help the body get rid of this excess water through the kidneys ^[8]. The goal is to reduce the “flooding” in the air sacs, which can help the patient get off the ventilator sooner ^[8].

Sedation and Paralytics: Resting the System

It can be distressing to see a loved one heavily sedated or completely still. However, these are tools used to help the lungs rest.

• Sedatives: These medications keep the patient comfortable and prevent them from “fighting” the ventilator. If a patient is too awake, they may breathe too vigorously, which can actually cause more lung damage ^[9][10].
• Neuromuscular Blockers (Paralytics): In severe cases, doctors may use “paralytics” to temporarily stop all muscle movement, including the diaphragm. This is done to:
  • Ensure the patient and the ventilator are perfectly in sync ^[11][12].
  • Reduce the amount of oxygen the body’s muscles are using, leaving more for vital organs ^[11].
  • Protect the lungs from the “tug-of-war” that happens when a patient tries to breathe against the machine ^[10].

These medications are typically used for a short window (often about 48 hours) while the lungs are in their most critical phase ^[11][13].

If the sedation is turned down and your loved one is awake but cannot speak because of the breathing tube, this can be terrifying for them. Ask the nurses for a communication board or use simple yes/no questions (like ‘blink once for yes’) to help them feel heard and safe.