Medical Device Clocks: A Digital Time Bomb?

Technology: The Good and Bad

It seems like everything in our world today has some kind of computer chip built into it.

Most of us either have a smart phone or tablet that now enables us to track the location of the device over the internet if it is misplaced.

The ability of electronic devices to automatically send and receive data is no exception when it comes to medical devices.

In most American hospitals, hundreds of medical devices are able to send data to an electronic medical record (EMR) databank.

The EMR is a repository of pertinent medical information that can be accessed instantly by doctors over their hospital’s computer network, or even from a remote location.

This can be very helpful.

But as we are learning, it is a double-edged sword since any disparities or inconsistencies in the EMR, even with something like time, can lead to catastrophic results.

Discovering Timing Problems

Dr. Julian Goldman is an anesthesiologist at Massachusetts General Hospital.

One day while in surgery he noticed a troubling problem:

The EMR noted him checking the level of a blood-thinning medication in an urgent neurological surgery eight minutes earlier than he actually did.

Timing in this setting is important because coagulation levels must be checked at appropriate intervals to prevent injury to the patient.

If blood is overly anti-coagulated (thinned), the patient can bleed to death from an internal hemorrhage.

On the other hand, if the blood isn’t thinned enough, a blood clot might develop that could result in a fatal pulmonary embolism.

The reason for the discrepancy in this case was because the internal clock on Dr. Goldman’s digital coagulation monitor was eight minutes slow.

Had another doctor come in, he or she would likely have looked at the EMT and assumed the medication was acting swiftly and reduced the dosage.

That assumption could have lead to a life threatening complications for the patient, including death.

Dr. Goldman realized that this was not an isolated incident and that it must happen all the time, across many hospitals.

To examine the problem he received a grant to perform a comprehensive survey of four of the best hospitals in his area.

He looked at devices such as medical monitors, heart-lung machines, pumps used to deliver drugs, and ventilators that allow patients to breathe.

The clocks on these devices were then compared to a cell phone clock set with the official US time.

The Results

Dr. Goldman presented his report at CPS Week this past April in Beijing.

The conclusions were startling.

During this study Dr. Goldman checked over 1,700 medical devices and found that one in five (20%) had a timing error of more than half an hour.

Further, the average time discrepancy for all medical devices reviewed was 24 minutes.

You don’t have to be medical malpractice lawyer to understand that 24 minutes can make a huge difference in treatment outcomes – and be the difference between life and death.

Dr. Goldman also looked at what happens to the faulty data that is being automatically generated by medical devices.

He found that EMR’s are designed to automatically reject obviously untimely data.

As a result, the doctor discovered that occasionally the ill-timed event was simply never reported in the EMR at all.

At other times it was buried somewhere in the record under the incorrect time, making it difficult to track.

Finally, he discovered that the EMR might record it after the patient leaves and a new patient has arrived for treatment.

The Solution

Dr. Goldman says there is a simple solution to this problem.

Medical devices should be plugged into something like the National Time Protocol (NTP), which is what keeps our cell phones and computers on the correct time.

The NTP regulates time according to the nation’s most accurate atomic clocks that orbit the earth and sends information via GPS.

But, the FDA has yet to mandate that medical devices have the capability to tap into the NTP.

As Dr. Goldman points out, this might be one cost that medical device makers just simply have to bear.

Fortunately, the United States Department of Health has already suggested implementation of this standard by 2014, but seems to have not gone as far as mandating that it be done for all medical devices.

No matter what, this issue represents another example of why patient safety must take priority over all else, including the profits of medical device manufacturers.