Understanding the language of the NICU, one word at a time.
11.8.2026
22 - a personal blog
Walking into the NICU for the first time can feel like stepping into an entirely different world.
There are monitors beeping, machines providing breathing support, IV lines, feeding tubes, and nurses and doctors speaking a language you may have never heard before. Suddenly, you’re hearing words like bradycardia, desaturation, intubation, gavage feeding, and PICC line.
You nod along, trying to take everything in, but inside, you’re wondering what any of it actually means.
What is happening to my baby? What are all these machines doing? What does that number on the monitor mean? And why does everyone seem to understand something that feels completely unfamiliar to me?
As a NICU nurse, I spent years using this terminology in my everyday work. I understood the equipment, the abbreviations, the procedures, and the conversations happening at the bedside.
But when Ivy was born, I found myself on the other side. I wasn’t the nurse caring for someone else’s baby. I was the mother sitting beside my own daughter, trying to understand every diagnosis, every procedure, every alarm, and every medical update.
That experience gave me a different perspective on the NICU. I realized just how overwhelming medical language can be when you’re already navigating fear, uncertainty, and the unfamiliar experience of having a baby in intensive care.
I created this guide to help parents feel a little more comfortable with the terminology they may hear during their NICU journey. You don’t need to memorize every word, and you certainly don’t need a medical degree. But understanding some of the language can help you feel more informed, ask questions, and participate in conversations about your baby’s care.
Let’s start with the basics.
1. Common NICU Terminology
These are some of the most frequently used words and phrases you may hear during your baby’s NICU stay.
NICU (Neonatal Intensive Care Unit): A specialized hospital unit that provides intensive medical care for newborn babies who need additional support.
Neonate: A newborn baby, generally during the first 28 days of life.
Premature (Preterm): A baby born before 37 completed weeks of pregnancy.
Gestational Age: How far along a pregnancy is, measured in weeks and days.
Corrected Age: A baby’s age adjusted for how early they were born.
Apnea: A pause in breathing.
Bradycardia (Brady): A slower-than-expected heart rate.
Desaturation (Desat): A drop in oxygen saturation.
Tachycardia: A faster-than-expected heart rate.
Hypoxia: A condition in which the body’s tissues do not receive enough oxygen.
Cyanosis: A bluish discoloration of the skin or lips that can indicate inadequate oxygenation.
Sepsis: A potentially life-threatening response to an infection.
Jaundice: Yellowing of the skin and eyes caused by elevated bilirubin levels.
Edema: Swelling caused by fluid buildup in the body’s tissues.
2. Respiratory Terminology: Understanding Breathing Support
One of the most intimidating parts of the NICU can be seeing your baby surrounded by respiratory equipment. Depending on their medical needs, babies may require different levels of breathing support. Some need a little extra oxygen, while others require assistance from a ventilator.
Here are some terms you may hear:
Room Air: Regular air, which contains approximately 21% oxygen.
Nasal Cannula: Small tubing placed in the nostrils to deliver supplemental oxygen or respiratory support.
HFNC (High-Flow Nasal Cannula): Delivers warmed, humidified gas at higher flow rates to support breathing.
CPAP (Continuous Positive Airway Pressure): Provides continuous pressure to help keep the baby’s airways and lungs open.
BiPAP: Provides two levels of airway pressure to support breathing.
Ventilator: A machine that assists or controls a baby’s breathing.
Intubation: The placement of a breathing tube into the trachea.
ETT (Endotracheal Tube): The tube placed into the trachea to provide respiratory support.
Extubation: Removal of the breathing tube.
Tracheostomy (Trach): A surgically created opening in the neck that provides access to the trachea for breathing.
FiO2: The percentage of oxygen being delivered to your baby.
PEEP: Positive End-Expiratory Pressure, which helps keep the lungs open between breaths.
Suctioning: Removing mucus and secretions from the airway.
Weaning: Gradually reducing respiratory support as a baby becomes able to breathe with less assistance.
If your baby requires respiratory support, don’t hesitate to ask the respiratory therapist or medical team what type of support they are receiving and what the goals are.
3. Heart and Cardiac Terminology
Some babies enter the NICU because of congenital heart defects or other cardiac complications. Parents may hear unfamiliar terms while their baby undergoes testing, monitoring, or surgery.
Here are a few common cardiac terms:
CHD (Congenital Heart Defect): A structural abnormality of the heart that is present at birth.
Heart Murmur: An unusual sound heard when listening to the heart.
Echocardiogram (Echo): An ultrasound that allows doctors to examine the heart’s structure and function.
ECG/EKG: A test that records the electrical activity of the heart.
ASD (Atrial Septal Defect): An opening between the upper chambers of the heart.
VSD (Ventricular Septal Defect): An opening between the lower chambers of the heart.
AVSD (Atrioventricular Septal Defect): A congenital heart defect involving the center of the heart and the structures separating its chambers.
TOF (Tetralogy of Fallot): A congenital heart condition involving four abnormalities of the heart.
PDA (Patent Ductus Arteriosus): A blood vessel that normally closes after birth but remains open.
Shunt: A pathway that allows blood to flow from one area of the circulatory system to another.
Cardiac Catheterization: A procedure that uses a thin catheter inserted into a blood vessel to examine or treat heart conditions.
Perfusion: How effectively blood circulates and delivers oxygen to the body’s tissues.
If your baby has a cardiac diagnosis, ask your cardiologist to explain the specific anatomy of your baby’s heart. Every diagnosis is different, and understanding your child’s individual condition is important.
4. Feeding and Nutrition Terminology
Feeding is another major part of the NICU journey. Some babies are able to breastfeed or bottle-feed right away, while others need additional support because of prematurity, respiratory needs, or medical conditions.
You may hear these terms:
PO: By mouth.
NG Tube (Nasogastric Tube): A feeding tube that passes through the nose into the stomach.
OG Tube (Orogastric Tube): A feeding tube that passes through the mouth into the stomach.
G-Tube (Gastrostomy Tube): A feeding tube surgically placed through the abdomen directly into the stomach.
Gavage Feeding: Feeding delivered through a tube into the stomach.
TPN (Total Parenteral Nutrition): Specialized nutrition delivered directly into the bloodstream through an IV or central venous catheter.
Lipids: Fats provided through IV nutrition to supply calories and essential fatty acids.
Fortification: Adding extra nutrients to breast milk or formula to help meet a baby’s nutritional needs.
NPO: Nothing by mouth.
Residuals: Stomach contents remaining before a feeding.
Aspiration: When food, liquid, or secretions enter the airway instead of going into the esophagus.
Feeding Intolerance: Difficulty tolerating feedings.
NEC (Necrotizing Enterocolitis): A serious intestinal disease that primarily affects premature and medically fragile newborns.
Feeding progress can look different for every baby. Some reach feeding milestones quickly, while others need additional time and support. Try not to compare your baby’s progress to another baby’s journey.
5. Understanding NICU Equipment and Medical Lines
Walking into your baby’s room and seeing monitors, wires, tubes, and machines can be overwhelming. You may wonder what everything is connected to and why your baby needs so many things.
Here is a breakdown of some commonly used NICU equipment:
Isolette: An enclosed bed that provides a controlled environment to help regulate a baby’s temperature.
Radiant Warmer: An open bed that provides heat to maintain body temperature.
Pulse Oximeter: A monitor that measures oxygen saturation and pulse rate.
Cardiorespiratory Monitor: Displays measurements such as heart rate, respiratory rate, and oxygen saturation.
IV (Intravenous Line): Provides access to a vein for fluids and medications.
PICC Line: A longer IV catheter inserted into a peripheral vein, with its tip positioned in a large central vein.
UVC (Umbilical Venous Catheter): A catheter placed into an umbilical vein.
UAC (Umbilical Arterial Catheter): A catheter placed into an umbilical artery.
Central Line: A catheter that provides access to a large vein.
Feeding Pump: Delivers measured amounts of nutrition through a feeding tube.
Suction Machine: Removes mucus and secretions.
Phototherapy Lights: Special lights used to treat newborn jaundice.
Don’t be afraid to ask your nurse to walk you through the equipment at your baby’s bedside. Understanding what each piece of equipment does can make the environment feel a little less intimidating.
6. Common NICU Abbreviations
You will quickly discover that the NICU has a language of its own. Nurses and providers often use abbreviations during rounds, shift reports, and medical documentation.
Here are some you may hear frequently:
VS: Vital Signs
HR: Heart Rate
RR: Respiratory Rate
SpO2: Oxygen Saturation
BP: Blood Pressure
CBC: Complete Blood Count
BMP: Basic Metabolic Panel
ABG: Arterial Blood Gas
CBG: Capillary Blood Gas
CXR: Chest X-ray
HUS: Head Ultrasound
MRI: Magnetic Resonance Imaging
EEG: Electroencephalogram
PRN: As Needed
BID: Twice Daily
TID: Three Times Daily
QID: Four Times Daily
Q3H: Every Three Hours
I&O: Intake and Output
DOL: Day of Life
CGA: Corrected Gestational Age
EDD: Estimated Due Date
You may hear these abbreviations repeatedly throughout your baby’s stay. If you don’t know what something means, ask. Medical terminology should never be a barrier to understanding your child’s care.
7. Understanding What You Hear During NICU Rounds
Rounds are an important part of your baby’s care. This is when members of the medical team discuss your baby’s condition, review progress, address concerns, and develop the plan for the day.
You may hear phrases such as:
Stable: Your baby’s condition is not currently changing significantly. Stable does not necessarily mean your baby is out of danger.
Critical: Your baby has a serious condition requiring intensive medical care.
Baseline: Your baby’s usual or expected measurements or condition.
Desaturation Event: An episode when oxygen saturation drops.
Intervention: An action or treatment taken to address a medical concern.
Cultures: Laboratory tests used to identify organisms that may be causing an infection.
Antibiotics: Medications used to treat bacterial infections.
Consult: A request for another specialist to evaluate your baby.
Multidisciplinary Team: Different healthcare professionals working together to coordinate your baby’s care.
One of the most important things to remember is that you are allowed to participate in rounds. You can ask questions, request clarification, and make sure you understand the plan before the team leaves your baby’s bedside.
8. Questions Every NICU Parent Should Feel Comfortable Asking
Sometimes, the hardest part of the NICU isn’t knowing what to ask. It’s knowing where to begin.
When you’re overwhelmed, exhausted, and trying to process everything happening to your baby, having a few questions written down can help.
Here are ten questions to keep in your notebook or bring to bedside rounds:
What are our biggest concerns for today?
What is my baby’s current diagnosis?
Has anything changed since yesterday?
What type of respiratory support is my baby receiving?
What do the numbers on the monitor mean?
What medications is my baby receiving, and why?
How is my baby tolerating feedings?
What labs or tests are being monitored?
What are the next steps in the treatment plan?
What needs to happen before my baby can go home?
And perhaps one of the most important questions: Can you explain that to me in a way I can better understand?
Never feel embarrassed to ask someone to repeat something or explain it differently.
A Note From a NICU Nurse and NICU Mom
I want every NICU parent reading this to remember something: You are not expected to become a medical professional just because your baby is in the hospital. You are allowed to ask questions. You are allowed to request clarification. You are allowed to take notes, ask for a second explanation, and speak up when something doesn’t make sense.
Before Ivy, I understood the NICU from the perspective of a nurse. I knew the terminology, the equipment, the procedures, and the routines. But becoming Ivy’s mom changed the way I understood everything. I learned what it felt like to wait for updates, to hear unfamiliar medical terms about my own child, to watch numbers on a monitor, and to depend on a team of people to help care for someone I loved more than anything. I understood that knowing the medical language and experiencing the emotions of being a NICU parent are two very different things.
The NICU can be an overwhelming place, but knowledge can help make the unfamiliar a little less frightening. You are your baby’s parent first. You know your baby in a way no one else does, and your voice matters. At The Ivy Branch, my hope is to create a space where NICU families can find information, encouragement, resources, and reminders that they are not navigating this journey alone.
If this guide helps even one parent feel more informed, more confident, or more comfortable asking questions, then it has served its purpose.
Because every parent deserves to understand the care their baby receives.
With love,
The Ivy Branch
