Navigation Links
Many Heart Patients Anemic After Too Many Blood Tests in Hospital

By Amanda Gardner
HealthDay Reporter

MONDAY, Aug. 8 (HealthDay News) -- One in five patients who are hospitalized for heart attacks develop anemia because so much of their blood is drawn for routine diagnostic tests, researchers have found.

Often, this anemia persists for a month or more after discharge and could spell worse outcomes -- even death -- down the line, according to a study in the Aug. 8 online edition of the Archives of Internal Medicine.

"This is not just a lab abnormality," said study senior author Dr. Mikhail Kosiborod, a cardiologist with St. Luke's Hospital Mid-America Heart & Vascular Institute in Kansas City, Mo. "These patients actually feel worse after they leave the hospital. Mortality is higher, too."

People with anemia have too-low numbers of the red blood cells that carry critical oxygen to different parts of the body.

The researchers had previously found that about half of heart attack patients who are admitted to the hospital with normal red blood cell, or hemoglobin, counts actually leave with new anemia.

But the majority of these patients had no bleeding complications that could account for the condition.

That led Kosiborod and his colleagues to hypothesize that it was due to the amounts of blood drawn for routine diagnostic tests.

"Drawing blood in a hospital is typically a very common occurrence, particularly in the intensive care unit," said Kosiborod, who is also an associate professor of medicine at the University of Missouri in Kansas City.

The study authors looked at electronic medical records for almost 18,000 patients who'd had a heart attack at one of 57 U.S. hospitals.

While all had normal hemoglobin levels when they were admitted, 20 percent developed moderate-to-severe anemia by the time they left the hospital.

The risk of anemia rose 18 percent for each 50 milliliters (mL) drawn.

"That was probably somewhat more than what we initially expected to find," Kosiborod said.

The average patient had 173.8 mL of blood drawn for testing, or about half a unit of whole blood. That was about 100 mL higher than the blood drawn in patients who didn't develop moderate-to-severe anemia, according to the researchers.

There were also differences in the amount of blood drawn from hospital to hospital.

"Because we see such a significant variation, chances are that one of the reasons for the variation is hospital-based processes of care," Kosiborod said. "Some hospitals draw more blood than others."

Fortunately, the authors have identified a couple of seemingly simple fixes to this problem.

One option would be to use smaller pediatric tubes to draw the blood rather than adult-sized tubes.

"Pediatric tubes are perfectly adequate for most of the tests that need to be done and can drastically reduce the amount of blood lost," Kosiborod said.

Fewer blood draws also would help, and it may be possible to use blood already drawn and already in the lab for subsequent tests.

But the findings aren't enough to conclude that unnecessary tests are being done, Kosiborod said.

Less testing could also result in medical problems and this study didn't look specifically at how appropriate the tests were.

But there may be an added benefit to doing fewer blood tests.

"We're spending a lot of money on these tests that [can be] unnecessary]," said Dr. Stephanie Rennke, lead author of an accompanying editorial and an assistant clinical professor of medicine at the University of California, San Francisco (UCSF). "If you put the cost together with the issue of the hazard of patients developing hospital-acquired anemia, that's pretty profound."

According to Rennke, UCSF has already tightened up its protocol for ordering blood tests. "We have to think before we order a test," she said.

More information

The U.S. National Library of Medicine has more on anemia.

SOURCES: Mikhail Kosiborod, M.D., cardiologist, St. Luke's Hospital Mid-America Heart & Vascular Institute, and associate professor, medicine, University of Missouri, Kansas City; Stephanie Rennke, M.D., assistant clinical professor, medicine, University of California, San Francisco; Aug. 8, 2011, Archives of Internal Medicine, online

Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. ICU Patients at Risk for Rare Heart Rhythm Problem
2. Cook With Love This Valentines Day With Heart-Smart Recipes
3. Study finds racial gaps continue in heart disease awareness
4. Highmark Foundation Awards $120,000 to the American Heart Association
5. Womens Heart Disease Awareness Still Lacking
6. American Heart Association Rapid Access Journal Report: Study Finds Racial Gaps Continue in Heart Disease Awareness, Low Knowledge of Heart Attack Warning Signs Among Women
7. Migraine Linked to Increased Heart Attack Risk
8. PERSONALABS Offers Discounted Healthy Heart Online Blood Tests in February
9. Compound shows promise against intractable heart failure
10. New American Heart Association Survey Finds Heart Disease and Stroke Patients Face Significant Barriers in Obtaining Quality, Affordable Care
11. Ex-President Clinton Undergoes Heart Procedure
Post Your Comments:
Related Image:
Many Heart Patients Anemic After Too Many Blood Tests in Hospital
(Date:11/27/2015)... ... November 27, 2015 , ... Keeping ... platform for mental health and wellness consultation, has collaborated with a leading web-based ... the knowledge gap experienced by parents and bring advice from parenting experts within ...
(Date:11/27/2015)... (PRWEB) , ... November 27, 2015 , ... Dr. ... Medical Associates, Inc. and Dr. Tucker Bierbaum with Emergency Medicine at St., ... observed that both STEMI and Sepsis conditions present in similar ways and require time-critical ...
(Date:11/26/2015)... (PRWEB) , ... November 26, 2015 , ... ... substance abuse located in central Michigan, have come together on Thanksgiving Day to ... produced video, available for viewing on the Serenity Point YouTube channel, patients displayed ...
(Date:11/26/2015)... ... November 26, 2015 , ... Somu Sivaramakrishnan announced today ... owner, Somu now offers travelers, value and care based Travel Services, including exclusive ... as well as, cabin upgrades and special amenities such as, shore excursions, discounted ...
(Date:11/26/2015)... ... ... PRMA Plastic Surgery is updating their record books yet again with an ... breast reconstruction surgery! , “What an accomplishment for the PRMA team, says Dr. ... an honor to have served all of these women.” , PRMA is one of ...
Breaking Medicine News(10 mins):
(Date:11/25/2015)... Nov. 26, 2015  The total global healthcare industry is ... 2015-2016. Latin America has the highest ... (excluding Japan ), is second with growth ... to face increased healthcare expenditure. In 2013-2014, total government funded ... 43.5% in 2008-2009 to 41.2% in 2013-2014. In real terms, ...
(Date:11/25/2015)... , Nov. 25, 2015 AAIPharma Services ... investment of at least $15.8  Million to expand ... Wilmington, NC . The expansion will provide ... meet the growing demands of the pharmaceutical and ... site expansion will provide up to 40,000 square ...
(Date:11/25/2015)... 2015 Kitov Pharma ceuticals ... a biopharmaceutical company focused on the development of therapeutic ... today announced the closing of its previously announced underwritten ... ), each representing 20 ordinary shares of the Company, ... ADSs and warrants were issued in a fixed combination ...
Breaking Medicine Technology: