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MRI Safety and Stents (2009 and earlier archive)
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Current Postings on This Page (53): • I have six cypher cordis medicine eluting stents
in two coronary arteries (4 in one and 2 in another). I had an MRI of the
head a month ago and all was fine. Now I need a breast MRI due to a lump
and since this area is closer to the stents, will I have a problem with
heat? My stents are in over 2 years now. • I had an AVE 3.5 x 30mm stent implanted in my
LAF artery in 1998. It was one of the early bare metal stents. Anyone
know if it is MRI safe? Also had a
bypass done on 2004, and was wondering if the wires used to tie the bone back
together are mri ok. I have 2 sets of them as they needed to go in twice, and
they left the old wires is (internal bleeding problems. I need an MRI on my
spine now. Also had a CorboMedics Annuloplasty ring installed on my Mitral
valve. It
says it is MRI safe to 3.0 Telsa. Do they use higher strengths than that now.
Thanks. • Who manufacturers the Tristar coronary stent?
Is it safe in a 3.0 Tesla
magnet? • Could u please tell if 3 x 23 mm sonic stent MRI
safe.This is regard to a patient who needs urgent MRI scan. Many thanks. • The safety of stents in the MRI enviroment is
dependent on field stength of the scanner. Magnets now clinically go
upto 7T with many being at 3T. Not all stents have been tested beyond 1.5T.
If they have not been tested patients will not be scanned at these field
stengths and therefore their appointment may need to be changed so that
they are scanned at a lower field. • is iliac symphony stents can be safe go under
mri procedure.thanks. • I have a 10X60 mm Wallstent placed in my common
bile duct. I have auto-immunue pancreatitis. Can I have a MRI on the lumbar
region of my back, as well as my hips? PS I realize you are focussing on
heart stents, but I can't seem to locate a site with any info on this particular
subject and would appreciate just finding out if this type of stent is
just too "metallic" for this procedure. Thank you
for your consideration • By and large, most stents are MRI safe -- but
this may vary from brand to brand and it is important to know which
stent is being discussed -- FDA approval for MRI safety in stents is given
for specific stents only. Also important is the exact make, model,
diameter and length of the stent. This information should be given
to
the MRI tech doing the imaging to make sure the magnetic field is within
safe limits. • I had a stent implanted in LAD in April 1998. (11 years ago). Is an MRI
safe for me now ? • Are all cardiac stents safe for an MRI after
the year 1995? • Ben H -- Yes the Endeavor stent is okay for MRI
use, but as Medtronic's
web site states: "...if you need an MRI, the
technician will need to operate the machine within certain limits. Be sure
to tell any doctor treating you that you have a stent and show them your
identification card." This is something we'd recommend no matter
what brand stent you have. • A previous
post has indicated that "the U.S. FDA approved both Boston Scientific's
Taxus and J&J's Cypher for immediate MRI." I have a Medtronic Endeavor
DES. Is there an FDA approval for MRI with this stent?
Thanks once again. • Antoinette -- read posts below and you'll note
that these stents are okay for MRI -- however, we always recommend letting
the MRI technician know how many and what type of stents you have BEFORE
the MRI. • I have seven stents two are multi-link zeta
the others are CYPHER. Due to lumbar problems I'd like to have an MRI
but now am hesitant to keep the appointment. I had restenosis in the multi-link
. At this point Ii am not sure what to do.
Last stents were in 2006. • Judy -- the Racer stent is colbalt-chromium so
not only is it MRI-safe, but it also allows MRI visualization after implantation
more than a stainless steel stent would. However, we always recommend
that you convey this information to the MRI/MRA operators, so they can
make
sure not to subject the patient to greater than recommended magnetic
fields. • My father has a Cordis Hepacoat BX Sonic OTW
stent and two Racer Stent systems made by Medtronic, one in each kidney.
He needs an MRI of his Head and neck. Are these stents approved to be
safe for an MRI? • Any experience with having an MRI after a stent
implant? • I work screening patients for MRI. I like to
see the brand name of a person's stent or they don't enter the magnet
room. I make sure the patient is safe. I am told there are unsafe stents
out
there. What are they and their names? I have only come across safe ones
according to my safety manual. • Neville -- that's a good question. Most stents
are MRI-safe, but whether working long-term in an MRI environment might
cause a problem is something we haven't heard reported on. We would think
it would be okay, since you're not going to be the subject of the MRI.
Maybe the training program organizers have more info. • 1 ( one) coronary medicated stent was placed
in 2001 in Delhi Ascorts Hospital. Now I am planning to take 18-months
training on MRI and want to work as MRI Technician. Do I have any risk
in Under going the training as well as
to take it as my profession? • Ernest -- read the previous entries. MRI is OK
after stenting. • I am a 80 yr old male and have 5 monorail stents
in 2006 and 3 taxus in early 2007. Now I am advised that I need a lower
back MRI. Anybody can see a problem. Should I ask for low power imaging
or stay away from it all? • To repeat the answer to your questions, if you
look at these news releases from April 2005, you'll see that the
U.S. FDA approved both Boston
Scientific's Taxus and J&J's
Cypher for safe MRI, immediately after implantation -- no waiting
necessary.. • I have a palmaz-Schatz Stent placed in 1996 I
have had virtually no issues. The VA wants to do an MRI on my Hip. I
thought I was warned not to have an MRI performed. My product code is:
P51530 LOt#
HK 1193 Any Information would be appreciated. • Found Murray Berman's experience to be very helpful.
I too had a Tristar bare metal stent in Dec 2000. I had a MRI done Aug
2008 without any side effects
or complications. • Is it safe to have an MRI procedure after having
a stent implant? My dad had an angioplasty procedure yr 2003. Is it safe?
please advice. thank you. • I had a Cypher Sirolimus-eluting Coronary Stent
(CORDIS) from J and J inserted three weeks ago. I am now told I need
an MRI for my lumbar back problems. how long should I wait for the MRI.
I
can live a few weeks with the back problem. • I am 63 yr. old female who had one drug eluting
sent placed in my right coronary artery on feb 2008,now I have sever pain
in the lower back and pelvic
joint area and I want to have an MRI for the area, Is it safe to have the test?
or I have to wait longer? • I am a engineer who consistently works around
MRI equipment. Reading these articles is it advisable to work on these
machines with stents in place? • Joann -- as indicated in earlier postings, the
FDA has found no problems with having an MRI immediately after stenting.
Can't say what might be causing your BP and vision problems. Have doctors
given any opinion? • I had an MRI for shoulder problems on a Monday
then on the following Friday I had problems with my blood pressure going
high and blurred vision. I have had 4 other episodes like this. I had
a stainless stent put in my artery in Jan of 2001. Could there be in any
connection between the MRI and the blood pressure
going high? • To Ray Z in Santa Monica -- My MRI was needed
to diagnose an herniated disc. I discussed the pains with my neurosurgeon.
he said these pains sometimes
occur because of the brace used during the MRI. It can cause irritation of
the nerves leading to the left side of the chest. Bottom line..no further
pain in
chest;
neck is repaired. • To Bruce in Houston
TX - I have had 16 Coronary
Stents inserted and a month later (after the 16th) a Cervical and Thoracic
MRI - No problem. I need to ask. Was the Cervical MRI needed for an injury?
Could the injury have also been in the thoracic area causing you discomfort?
Perhaps you should look into
this. • Chandra -- if you look at the posts below from
April 2005, you'll see that the U.S. FDA approved both Boston
Scientific's
Taxus and J&J's
Cypher for immediate MRI. Best wishes. • Dear Sir I am awaiting permission from someone as to whether or not I
am a candidate for MRI. In Oct 2006 I had two Johnson& Johnson Cypher 2 stents
implanted. Now I am suffering from Tongue Carcinoma and advised MRI. Am I able
to have the MRI? Please advice urgently. • Bruce -- your story is very interesting.
We know that the FDA cleared MRI for stents, but we're not sure if they tested
for situations where there were 7 stents. You're the first person to
write in with this problem to our Forum. You should share your experience
with
the FDA and please let us know
how you are faring.. • Since 03/2006 I have had 7 stents placed (3 to
resolve a failed bypass). Last stent was 2/21/2008. On 03/12/2008 I underwent
an MRI of the cervical spine. The test was very uncomfortable and I was
unable to focus when leaving the facility. I experienced significant
chest pain centralized under the sternum most of the evening and was unable
to
sleep that night due to nightmares (which I never have). Today, 03/13/2008,
I have not completely recovered. I will do my best to avoid an MRI in
the future, no matter what the FDA says. • Angela -- read the posts below. The FDA has cleared
both Cypher and Taxus drug-eluting stents for immediate MRI. • CAN MY HUSBAND HAVE A MRI WITH TAXUS EXPRESS
2. PLEASE GET BACK WITH ME. • Due to a long term ongoing knee problem- osteoarthritis,
I'm to understand that my doctor may be considering an MRI for this issue.
However I do have two Multi-Link Vision Cobalt Chromium Coronary Stents
in my right coronary artery. I'm to understand that this may represent
a significant problem with doing an MRI... Is there a specific reason
why? • Thank you for your very fast reply to me regarding
my enquiry about having an MRI with two stents from June 2000. The MRI
went well and no problems occured. Thank you. • Murray -- the two drug-eluting stents available
in the U.S. were both approved for immedate MRI imaging last April. The
Tristar is a bare metal stent made by Guidant. The IFU
(Instructions For Use) from Guidant states "Do not perform a magnetic
resonance imaging (MRI) scan on patients post-stent implantation until
the stent has completely endothelialized (eight weeks) to minimize the
potential for migration. The stent may cause artifacts in MRI scans due
to distortion of the magnetic field." Hope this helps. Please let
us know how things work out. • I awaiting permission from someone as to whether
or not I am a candidate for MRI. In June 2000 I had two Tristar stents
implanted. Dec 31 2005 I fell on my left shoulder and have a full tear
of of a tendon the Supraspatina. Am I able to have the MRI? My orthopedic
surgeon is delaying surgery until he is told it is OK. I am assuming that
in 2000 the stent was stainless steel ? Correct ? Thanks • In Aug. 2004 I had 2 coronary stents placed: ACS
multi-linkpixel(13mm)and a Taxus Express2(20mm). During a cervical MRI
on 10-28-05 I felt heat and vibration in the sternum and just left of the
sternum in my chest about ten minutes into a proposed 30 minute MRI. It
was an "open MRI". I stopped the test. Anyone have an explanation for this?
Anyone have a similar experience? Would a "closed MRI" using less magnetism
get me through this test? Any responses are greatly appreciated. • Ashok -- the reason MRI scans were avoided in
stent patients for several months after stent placement was to give the
endothelium (inner lining of the artery) a chance to cover and anchor the
stent -- there was concern that the strong magnetic field would dislodge
the metallic stent. Now tests have been run (see postings below) that have
shown this does not occur and the FDA now says it's okay to do an MRI immediate
post-stenting. Your hypothesis is, however, theoretically interesting --
that the iron in red blood cells is attracted to a magnetized stent. I
don't think the magnetism remains in the metal stent after an MRI, nor
would it be strong enough to cause red cells to congregate -- of course,
it would also be interesting to look at the data from stent patients who
have had MRI scans and see if the restenosis rate is abnormal. • I had an angioplasty done at Apollo Hospital
Chennai, India in December 1998 and then the doctors advised me to refrain
from high magnetic field like mri scan for the first 6 months after angioplasty.
In 2003 i had an MRI done and the doctors said it was ok. Being a physics
student its scientific as the metal stent would be magnetised and then
would attract cells therefore enhancing the chances of restenosis. All
the best • UPDATE2: Today the FDA approved
the CYPHER stent from Johnson & Johnson / Cordis for immediate
MRI as well. So now both the drug-eluting stents have been okayed for
immediate MRI imaging! • UPDATE: Just a few days ago, the FDA approved
Boston Scientific's TAXUS stent for MRI-compatibility. This means that
MRIs can be done immediately after stent placement. The company was able
to demonstrate that no ill effects are caused by MRI. This has something
to do with the stent designs, but also to the fact that newer generation
MRI scanning uses lower fields of power than the older machines, thus
the effect on metallic stents is nil. You can read the company's press
release here.
Other stents may possibly be safe as well, but the TAXUS is the only
one currently approved by the FDA. • Is there a length of time one should wait
after a coronary artery stent is put in before allowing a patient to
have an MRI study, or can MRI be done safely immediately or a couple
of weeks after stent placement? Keith T. Chesser, M.D. UAB Medical West
Dep. of Radiology Birmingham, AL • My husband had a drug eluting stent placed
in his aorta July 2004. He needs to have a MRI for a shoulder problem.
Will the MRI have any effect on the stent or the dosage of the drug due
to the heat? • I am 48 year old female who underwent MRI and
MRA April 19,1999. I had stainless steel implant done in December of 1999.
I was frightened about having this done because I am not familiar with
the strength of the magnetism of the MRI. I kept repeating to those doing
the test that I had this implant and they didnt seem concerned. • As an engineer who has received a Palmaz-Schatz
stent over two years ago, I am very interested in the answer to this question
also. My guess is that a hi-energy magnetic field may cause migration of
even the so called "non-magnetic" stainless steel stents, possibly causing
fracturing of plaque and or separation of arterial tissue. • Has anyone ever seen or heard of a problem in
any patient who has undergone an MR exam following recent stent placement,
i.e., within 24 to 48 hours? |
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