A new
study
gives
the
strongest
evidence
yet that
obesity
surgery
can cure
diabetes.
Patients
who had
surgery
to
reduce
the size
of their
stomachs
were
five
times
more
likely
to see
their
diabetes
disappear
over the
next two
years
than
were
patients
who had
standard
diabetes
care,
according
to
Australian
researchers.
Most of
the
surgery
patients
were
able to
stop
taking
diabetes
drugs
and
achieve
normal
blood
tests.
"It's
the best
therapy
for
diabetes
that we
have
today,
and it's
very low
risk,"
said the
study's
lead
author,
Dr. John
Dixon of
Monash
University
Medical
School
in
Melbourne,
Australia.
The
patients
had
stomach
band
surgery,
a
procedure
more
common
in
Australia
than in
the
United
States,
where
gastric
bypass
surgery,
or
stomach
stapling,
predominates.
Gastric
bypass
is even
more
effective
against
diabetes,
achieving
remission
in a
matter
of days
or a
month,
said Dr.
David
Cummings,
who
wrote an
accompanying
editorial
in the
journal
but was
not
involved
in the
study.
"We have
traditionally
considered
diabetes
to be a
chronic,
progressive
disease,"
said
Cummings
of the
University
of
Washington
in
Seattle.
"But
these
operations
really
do
represent
a
realistic
hope for
curing
most
patients."
Diabetes
experts
who read
the
study
said
surgery
should
be
considered
for some
obese
patients,
but more
research
is
needed
to see
how long
results
last and
which
patients
benefit
most.
Surgery
risks
should
be
weighed
against
diabetes
drug
side
effects
and the
long-term
risks of
diabetes
itself,
they
said.
Experts
generally
agree
that
weight-loss
surgery
would
never be
appropriate
for
diabetics
who are
not
obese,
and
current
federal
guidelines
restrict
the
surgery
to obese
people.
The
diabetes
benefits
of
weight-loss
surgery
were
known,
but the
Australian
study in
Wednesday's
Journal
of the
American
Medical
Association
is the
first of
its kind
to
compare
diabetes
in
patients
randomly
assigned
to
surgery
or
standard
care.
Scientists
consider
randomized
studies
to yield
the
highest-quality
evidence.
The
study
involved
55
patients,
so
experts
will be
looking
for
results
of
larger
experiments
under
way.
"Few
studies
really
qualify
as being
a
landmark
study.
This one
is,"
said Dr.
Philip
Schauer,
who was
not
involved
in the
Australian
research
but
leads a
Cleveland
Clinic
study
that is
recruiting
150
obese
people
with
diabetes
to
compare
two
types of
surgery
and
standard
medical
care.
"This
opens an
entirely
new way
of
thinking
about
diabetes."
Obesity
is a
major
risk
factor
for
diabetes,
and
researchers
are
furiously
pursuing
reasons
for the
link as
rates
for both
climb.
What's
known is
that
excess
fat can
cause
the
body's
normal
response
to
insulin
to go
haywire.
Researchers
are
investigating
insulin-regulating
hormones
released
by fat
and the
role of
fatty
acids in
the
blood.
In the
Australian
study,
all the
patients
were
obese
and had
been
diagnosed
with
type 2
diabetes
during
the past
two
years.
Their
average
age was
47. Half
the
patients
underwent
a type
of
surgery
called
laparoscopic
gastric
banding,
where an
adjustable
silicone
cuff is
installed
around
the
upper
stomach,
limiting
how much
a person
can eat.
Both
groups
lost
weight
over two
years;
the
surgery
patients
lost 46
pounds
on
average,
while
the
standard-care
patients
lost an
average
of 3
pounds.
Blood
tests
showed
diabetes
remission
in 22 of
the 29
surgery
patients
after
two
years.
In the
standard-care
group,
only
four of
the 26
patients
achieved
that
goal.
The
patients
who lost
the most
weight
were the
most
likely
to
eliminate
their
diabetes.
Both
patient
groups
learned
about
low-fat,
high-fiber
diets
and were
encouraged
to
exercise.
Both
groups
could
meet
with a
health
professional
every
six
weeks
for two
years.
The
death
rate for
stomach
band
surgery,
which
can cost
$17,000
to
$20,000,
is about
1 in
1,000.
There
were
only
minor
complications
in the
study.
Stomach
stapling
has a 2
percent
death
rate and
costs
$20,000
to
$30,000.
In the
United
States,
surgeons
perform
more
than
100,000
obesity
surgeries
each
year.
The
American
Diabetes
Association
is
interested
in the
findings.
The
group
revises
its
recommendations
each
fall,
taking
new
research
into
account.
"There
is a
growing
body of
evidence
that
bariatric
surgery
is an
effective
tool for
managing
diabetes,"
said Dr.
John
Buse of
the
University
of North
Carolina
School
of
Medicine
in
Chapel
Hill,
the
association's
president
for
medicine
and
science.
"It's
just a
question
of how
effective
is it,
for what
spectrum
of
patients,
over
what
period
of time
and at
what
cost?
Not all
those
questions
have
been
answered
yet."
Medical
devices
used in
the
study
were
provided
by the
manufacturers,
but the
companies
had no
say over
the
study's
design
or its
findings,
Dixon
said.
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