Recipe
for Leftovers
Changing
computerized medication orders can cause a significant unintended
and unrecognized effect when a portion of the previous order
remains in the system. A physician discovered the following
when reducing a warfarin dose for a patient with an elevated
prothrombin time:
- I
used the electronic medical record system (CPRS) to make
the changes to his medications. I highlighted the order
and selected the change medication option. I then changed
the daily dose to 3.0 mg/d, signed and released the order.
Either unnoticed by me, or unknown to me, a second line
of instructions from the prior order remained in the new
prescription... This could have serious adverse effects
with unknown inappropriate dosing.
The physician
had an opportunity to correct the order when later contacted
by a pharmacist.
- This
only came to my attention because the pharmacist did not
have tablets available to fill the prescription, but was
under the impression it should have been for the higher
dose. The CPRS program should completely remove old prescription
information when the script is changed.
The physician
discussed this safety hazard with the pharmacy, the laboratory,
and the facility information technology person involved with
CPRS.
Hold
the Needle!
Adverse
reactions occur in about 5% of contrast media examinations.
Severe side effects, such as asthma or anaphylaxis, occur
less commonly than mild reactions such as flushing, nausea,
and headache (Allergy. 2000 Jun;55(6): 581-2). A reporter
described a near miss when a patient almost received an x-ray
contrast dye to which he had a known allergy.
- Patient
directed to report to Radiology for x-ray procedure... X-ray
technician asked just before inserting needle 'Are you allergic
to anything?' Patient replied, 'Yes, Optiray 300 injection.'
The x-ray
technician did not give the injection already drawn up for
that patient. The lack of information about patient allergies
was explained:
- Radiology
does not receive record of patients to be x-rayed! Info
on these patients is available on computer.
However,
the computers are located far from the x-ray examination room,
and are not routinely checked prior to a procedure. The reporter
had a suggestion for preventing similar occurrences:
- Have
a special card printed at each registration encounter that
lists the date, the reason for the visit, as well as patient's
regular medications and allergies.
The reporter
also expressed concern for elderly veterans:
- They
don't always remember their reason for the visit, their
medications, and many times do not respond clearly to the
'Are you allergic?' question.
Invisible
Medications
Most gastroenterologists
(71% to 82%) discontinue oral anticoagulant (OAC) therapy
prior to performing colonoscopies (Gastrointest Endosc.
1996 Sep;44(3):309-16). A more recent review of 31 studies
did not find published reports of major bleeding while receiving
therapeutic OAC for patients undergoing colonoscopy with or
without biopsy, but stressed that the pre-operative strategy
should be individualized (Arch Intern Med. 2003 Apr
28;163(8):901-8).
A reporter
described the outcome of a colonoscopy with biopsy performed
without knowledge of the patient's OAC status. The patient
traveled to the medical center from the vet center in which
he lived. Since the clinician wanted to rule out a lower colon
tumor:
- It
was decided to perform a rectal biopsy on the patient. The
electronic record was reviewed for medications. None were
listed because the vet center opted not to enter patient
meds into the computerized record and there was no qualifier
alert on the patient's med screen warning that no meds were
entered. Actually the patient was on coumadin and the biopsy
caused excessive bleeding.
The reporter
noted that one might prevent future reoccurrences by:
- Asking
the patient, 'What meds are you on?' [or] checking the hardcopy
record. (Note - if the vet center knows there is a procedure
scheduled they send the medication record. This was an unplanned
procedure.)
Shaken
Up
A reporter
cautioned that potentially permanent adverse effects can arise
from prescribing compazine (prochlorperazine) for long term
use, quoting from Micromedex:
- The
use of neuroleptic drugs, such as prochlorperazine, is a
risk factor for the development of tardive dyskinesia. This
risk of developing the syndrome increases with duration
of treatment and total cumulative dose...However, any patient
may be at risk to develop the syndrome, even after a comparatively
brief treatment period at a low dose.
Finding
two patients in three months who had developed tardive dyskinesia
after prolonged use of compazine, the clinicians took action:
- We
have added to our drug file nomenclature: 'Compazine is
only indicated for short duration due to risk of tardive
dyskinesia with long term use.' And, for quick orders, 'Long
term use may be associated with tardive dyskinesia.' We
have additionally run a list of all patients with active
compazine prescriptions and will be evaluating those cases
as well. Our Pharmacy and Therapeutics Committee is considering
the issue during their meeting and may recommend refill
limitations.
Sleepytime
Fog
The complex
tasks of anesthesia require sustained attention and are particularly
vulnerable to the effects of fatigue (Anesthesiology.
2002 Nov;97(5):1281-94). While concluding a rotation of weekend
on call, an anesthesiologist discovered the performance effects
of not getting adequate sleep.
- The
last case... began [in the early hours of Monday morning]
and ended 1 1/2 hours later. Delayed emergence secondary
to anesthetic agent being left on. (Volatile anesthetic
off - nitrous oxide on.) Possibly (probably!) fatigue related.
After noticing (after 5 minutes) nitrous oxide discontinued
and patient awakened. Impaired decision making at early
morning hour.
The reporter
was supervising a co-worker who had also been up most of the
night. Each thought the other person had turned off the nitrous
oxide.
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