Scientists
say a new diagnostic tool may help doctors catch patients most at risk
for acute respiratory (ARDS) failure following surgery.
Daryl J. Kor of the Mayo Clinic analyzed data from a large
clinical trial spanning 22 medical centers, finding 1,562 patients who’d
previously been identified as high risk for suffering ARDS, a condition
that affects 200,000 Americans every year.
Finding that 7.5 percent of
that group had later developed the condition, the researchers revised
the old diagnostic previously used to assess ARDS risk for candidates
for elective surgery.
"It's certainly true in this case that an ounce of prevention is worth a pound of cure," Kor said in a statement.
"But our ability to predict who is at risk has been limited. By
identifying those who are at highest risk with better accuracy, we can
begin to take steps toward preventing this dangerous and costly surgical
complication."
The condition may arise as a result of smoke inhalation,
pneumonia, or blood infection, though high-risk patients may develop
ARDS after surgery. Sadly, the condition is hard to treat and kills
patients about 30 percent of the time.
Although surgeons may manage the
risk of ARDS by restricting the volume of fluids and using alternative
lung-ventilating methods, the blanket approach is time-consuming given
that only three percent of patients at risk eventually develop the
condition.
Thus, the researchers say the new diagnostic may help
doctors focus on ARDS prevention among those most susceptible, with a
risk level based on one or more of nine predictors associated with the
condition, including blood infection, liver disease, emergency surgery,
and an increased respiratory rate among others.
"Previous efforts have largely focused on treating ARDS
well after it's onset," Kor said. "There has not been a lot of success
with that strategy.
If the new prediction tool is validated by other
studies, it could be used as a screening mechanism to identify patients
at greatest risk for ARDS, thereby facilitating its prevention as well
as associated complications and death."
SOURCE: http://www.medicaldaily.com/respiratory-failure-prevention-may-be-found-new-diagnostic-tool-screens-risk-patients-278220
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