A new study published in BMJ Tuesday suggests that if experts
classified medical error as a disease, it would be the third leading
cause of death in the United States.
Helmed by
researchers at Johns Hopkins University, the paper estimates that
medical errors cause 250,000 deaths a year, surpassing chronic lower
respiratory diseases—the third leading cause of death—by more than
100,000. The authors blame limitations in death certificates for the
lack of accurate data on the topic, and suggest the way fatalities are
reported be revised.
Medical error is loosely defined
as a “preventable adverse effect of care, whether or not it is evident
or harmful to the patient.” The authors of the BMJ study cite specific
types of error, which include “the use of a wrong plan,” “the failure of
a planned action to be completed as intended,” and “an unintended act.”
It’s
a phenomenon that’s virtually invisible in death statistics due to the
United States reliance on what’s called the International Classification
of Disease (ICD). Approved by the World Health Organization (WHO), it
is used by 117 countries worldwide as a standard diagnostic tool for
measuring mortality and morbidity statistics.
The
system provides specific codes that correspond to causes of death, but
leaves no room for physicians or others to denote a cause that resulted
from a medical shortcoming. As a result of this limitation, there is no
way to track how much medical error plays into the death rate worldwide.
Studies
on the amount of deaths caused by medical error in the U.S., as a
result, have been scant. The “seminal” study on the topic, as far as
science is concerned, is a 1999 paper from the Institute of Medicine
(IOM), which the authors call “limited and outdated.” The report
estimates anywhere from 44,000 to 98,000 deaths per year from medical
error.
Since 1999, several more studies on the topic
have been released; one in 2008 suggested that as many as 400,000 people
die a year from this cause. To update the current number, the
researchers combined all of the studies since 1999 and performed a
weighted analysis. The result: a mean rate of 251,454 deaths per year
from medical error.
Martin A. Makary, the leader of the
study and an oncologist at Johns Hopkins, attributes the lack of
knowledge surrounding the issue to the CDC’s failure to create a system
in which deaths due to medical care could be catalogued.
“Currently,
deaths caused by errors are unmeasured and discussions about prevention
occur in limited and confidential forums, such as a hospital’s internal
root cause analysis committee or a department’s morbidity and mortality
conference,” writes Makary. “These forums review only a fraction of
detected adverse events and the lessons learnt are not disseminated
beyond the institution or department.”
The researchers
give one example case of a death caused by medical error, that of a
“young woman” who had successfully recovered from a transplant surgery. A
few days after going home, she came back to the hospital with
“non-specific symptoms.” At that point, doctors performed “extensive
tests,” some of which the authors deem “unnecessary.”
When
she returned days later, she was suffering from intra-abdominal
hemorrhage and cardiopulmonary arrest. “An autopsy revealed that the
needle inserted during the
pericardiocentesis grazed
the liver causing a pseudoaneurysm that resulted in subsequent rupture
and death,” the authors write. “The death certificate listed the cause
of death as cardiovascular.”
Stories like these, says
Makary, perfectly capture the problem with death statistics, and
highlight the need for both the U.S. and the World Health Organization
to pursue a better system.
Read more: 3rd Top Cause of Death: Medical Errors - The Daily Beast
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