ICU Patients With Iron Deficiency More Likely to Require Blood Transfusion

Chicago — (April 23, 2010) 

Receiving a blood transfusion in the intensive care unit (ICU) is not uncommon, but reliable predictors for patients that will require transfusion are not readily available. A new study published in the May issue of Anesthesiology seeks to reduce the occurrence of ICU transfusions, revealing a new marker for patients at higher risk for developing severe anemia and subsequently requiring transfusion in the ICU.

In this study, Rafael Fernandez, M.D., Ph.D. and colleagues set out to determine if patients with functional iron deficiency (called CHr) was associated with transfusion requirements in ICU patients.

“Previous studies have indicated that anemia is a common occurrence in ICU patients and is even associated with greater patient mortality while admitted to the hospital,” said Dr. Fernandez. “Our study was designed as an observational investigation looking for clues about anemia in critically ill patients and associations between iron deficiency, a common cause of anemia, at ICU admission and the requirement for transfusion.”

About the Study
Researchers examined patients admitted to a 16-bed ICU over a two month period. During that time period 75 patients were admitted. A total of 62 patients had an ICU stay of greater than 48 hours and were included in the study.

Of these patients, 23 were admitted with iron deficiency. Patients presenting with iron deficiency were found to be sicker and more likely to have sepsis. These patients were also found to be prone to complications in particular renal failure (37 percent) and ICU-acquired infection (30 percent).

Significantly the transfusion rate for patients was 22.6 percent, a rate that was higher in patients with low CHr levels signaling iron deficiency than in patients with normal-CHr (39.1 percent to 12.8 percent).

Next Steps
Dr. Fernandez commented on the significance of the study results: “The fact that iron deficiency was associated with a higher need for a transfusion and higher likelihood of mortality in this group should reinforce the impact iron levels can have on surgical outcomes. Whenever possible, iron levels should be well-managed prior to admission.”

Further research on the significance of iron deficiency and need for blood transfusion is required. Dr. Fernandez and colleagues recommend that critically ill patients with low CHr levels are included in future studies to determine if early treatment with intravenous iron after ICU admission could reduce the need for transfusions.

For more information visit the Anesthesiology Web site at www.anesthesiology.org.

THE AMERICAN SOCIETY OF ANESTHESIOLOGISTS

Founded in 1905, the American Society of Anesthesiologists (ASA) is an educational, research and scientific society with more than 50,000 members organized to raise and maintain the standards of the medical practice of anesthesiology. ASA is committed to ensuring that physician anesthesiologists evaluate and supervise the medical care of patients before, during, and after surgery to provide the highest quality and safest care that every patient deserves.

For more information on the field of anesthesiology, visit the American Society of Anesthesiologists online at asahq.org. To learn more about the role physician anesthesiologists play in ensuring patient safety, visit asahq.org/WhenSecondsCount. Join the ANESTHESIOLOGYTM 2013 social conversation today. Like ASA on Facebook, follow ASALifeline on Twitter and use the hashtag #ANES2013.

###

Contact:

American Society of Anesthesiologists
communications@asahq.org
847-825-5586