Acute respiratory distress syndrome
Known as ARDS
A health problem that occurs when the lungs are not able to give the blood enough oxygen. Patients who have ARDS are very ill and need medical treatment. They usually end up in the intensive care unit (ICU) on a machine that helps them breathe (ventilator). 
ARDS is caused by liquid that gets into the lungs, which should never have liquid in them. The goal of treating ARDS is to support the patient in the ICU until his or her lungs heal.
Keywords: acute, respiratory, distress, syndrome, ARDS
Advance directive
Instructions in writing for your family and the care team, if you are a patient. They state your wishes about medical treatment, should you become too ill to do so yourself. An advance directive is a living will or durable power of attorney. The durable power of attorney gives another person the power to make decisions about your treatment.
Laws about advance directives are different in each state, so you should write one for all states in which you spend a lot of time. An advance directive will not expire unless the person who wrote it writes a new version. Every few years, you should review and update your advance directives.
Keywords: advance, directive, living, will, durable, power, attorney
Allied health professional
A caregiver who is not a doctor or direct care registered nurse but has medical skills. An allied health professional has studied medical care, trained in it, and often earned proof of his or her efforts.  
Allied health professionals are in charge of different things. Some offer dietary tips. Some make sure medical records are up-to-date. Some lead or perform medical procedures.
Examples of allied health professionals include:
  • Emergency medical technicians
  • Pharmacists
  • Physical and occupational therapists
  • Physician assistants and nurse practitioners
  • Radiologic technologists
  • Respiratory therapists
Keywords: allied, health, professional
A medicine that reduces or gets rid of pain, fever or swelling. In the intensive care unit (ICU), the care team put it on or into the patient's body to: 
  • Decrease the patient’s stress
  • Help the patient sleep through the noise and light of the ICU
  • Make the patient feel less sick, sore, stiff, forgetful or constipated
An analgesic can also reduce side effects and discomfort caused by a medical procedure.
Keywords: analgesic, medicine
A medicine put on or into the patient's body to cause a temporary loss of feeling. An anesthetic can also make the patient sleepy.
An anesthetic may help the patient feel more comfortable during an invasive procedure. During this kind of procedure, the skin is broken or a tube is inserted into one of the body's natural openings. This helps the care team see and treat parts inside of the patient's body, such as organs.
Keywords: anesthetic, medicine
Arterial line
Called a-line or art line
A small tube in the artery, usually placed in the wrist. The care team use this tube to check the patient’s blood pressure and take blood samples.
Some patients in the intensive care unit (ICU) need drugs that can harm their body over time. If so, they need their blood checked regularly. Having an a-line is more comfortable for them than getting stuck with a needle each time.
Keywords: arterial, line, a-line, art line
A type of blood vessel that carries oxygen-rich blood away from the heart to the rest of the body. This helps a person stay alive.
Keywords: artery, blood, vessel
Attending physician
A medical doctor who oversees all of the patient’s care. The attending physician is also in charge of medical interns, students and residents (those training to become doctors). He or she can change any decision made by a doctor-in-training.
Keywords: attending, physician, doctor
Blood pressure

A force that pushes against the walls of an artery as blood moves through the artery. Having high blood pressure for a long time is dangerous. It stiffens arteries and makes them vulnerable to fat buildup, which can lead to a heart attack, a stroke or kidney failure.

Keywords: blood, pressure
Blood pressure cuff
A wide strip of fabric placed around the arm or leg. The care team automatically or manually inflate it. This helps them assess the amount of blood pressure in the patient’s veins.
Keywords: blood, pressure, cuff
Brain death
One of two kinds of death known by law—the first and most common kind occurs when the heart stops. Brain death occurs when the brain stops working. The heart of the patient who is brain dead may continue to beat, but the patient cannot breathe without machines. He or she cannot have any thoughts or feelings, including pain. When this happens, all life support is turned off.

Turned-off support is not the same as withdrawn support. Support is withdrawn when the patient is alive but has chosen to die comfortably over time.
Keywords: brain, death
Cardiac arrest
The sudden loss of all heart function. Cardiac arrest is not the same as a heart attack, which occurs when blockage causes sudden damage to the heart. A heart attack may lead to cardiac arrest, but cardiac arrest is usually caused by:
  • Choking
  • Coronary heart disease
  • Electrocution
  • Drowning
Cardiac arrest permanently damages the brain within four to six minutes of occurring. Ninety-five percent of people who experience it do not survive. Those who do survive are likely to need critical care.
Keywords: cardiac, arrest
Cardiac monitor
Called heart monitor

A machine that records electrical activity of the heart. It has a screen with lines that move across it, known as tracings. Tracings appear once the care team place leads on the patient’s body. They use tracings to assess and respond to the patient’s heartbeat. Unusual beating can be a chemical or mechanical problem with the heart.
Keywords: cardiac, monitor, heart
Cardiopulmonary resuscitation
Known as CPR

Medical treatment that supplies oxygen to the lungs and keeps blood flowing in the body of someone whose heart has suddenly stopped. CPR helps the caregiver prevent brain damage until he or she can better treat the patient. The caregiver who does CPR has trained in it. CPR has three steps, called circulation, airway, and breathing, or CAB.
  1. Circulation (done by compressions): The caregiver places both hands on the patient's chest and presses down about two inches. The caregiver does this one hundred times a minute.
  2. Airway: The caregiver positions the patient for breathing.
  3. Breathing: The caregiver opens the patient's mouth and slowly breathes into it two times to make the chest rise. Then the caregiver checks if the patient has a pulse. If not, the caregiver repeats all three steps until the patient has a pulse.
During CPR, the caregiver may also use a machine to restart the heart. CPR does not always work and is not the right treatment for all patients.
Keywords: cardiopulmonary, resuscitation, CPR, compressions
Case manager
A caregiver who makes sure the doctor's plan of care and post-hospital care meets the patient’s needs. These needs are based on culture, health coverage, and other factors in the patient’s life.
Keywords: case, manager
A thin, flexible tube inserted into the patient's body so fluids can move into and out of his or her systems. There are many types of catheters, each with a different purpose. A catheter is important in critical care because it provides the patient with:
  • Food, through the nose or stomach, when the patient is not able to eat
  • Relief, through the bladder, when the patient is not able to go to the bathroom
  • Medicine, into the vein, when the patient is feeling pain
Not being able to eat, go to the bathroom, or feel well is the result of illness or medical treatment. The care team often use peripherally inserted central catheters, or PICCs, to help the patient get better. A PICC goes through the arm into a vein until it reaches the heart.
Keywords: catheter, PICC
Central venous catheter
Called CVC or central line 

A tube in the neck, chest or groin that helps the care team check and treat blood flow. It also helps them give the patient fluids, medicine or nutrients.
Sometimes, the care team put a CVC into a large vein in the arm, which is known as a peripherally inserted central catheter, or PICC. Before placing a CVC, the care team usually give the patient medicine for pain or anxiety. A CVC can stay in the patient’s body for days or weeks, as long as it shows no signs of infection.
Keywords: central, venous, catheter, PICC
A clergy member in the hospital who talks with patients, families and staff. The chaplain provides spiritual support and may help find a clergy member of the patient’s faith to better meet the patient’s spiritual needs. Often the chaplain plays an important role in end-of-life care.
Keywords: chaplain, faith, spiritual
Chest tube
A large tube inserted through the skin into the lungs. The chest tube removes air or blood that makes breathing hard to do for the patient.
Keywords: chest, tube
Child life specialist
An expert in child development who works with ill children. The child life specialist provides play and distraction therapy. He or she often works with other experts in the pediatric intensive care unit (PICU) to improve the health and well-being of very ill children.
Keywords: child, life, specialist, children, PICU
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