Tag: priors

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Don’t Skimp On Sensitivity!

sensitivity

In radiology, almost anything can change our sensitivity to detecting disease. Problems with electronics and hardware such as PACS, the RIS, imaging software, or even dictation software can cause us to miss out on information. Phone calls and texts can interrupt our train of thought. Many of these problems can be beyond our control. But, there are also ways that we are directly responsible for our daily reads that can affect our sensitivity. So, what are some main ways radiologists can knowingly skimp on sensitivity to negatively affect patient care?

Not Getting Priors- A Template For Decreasing Sensitivity

Out of all the ways we can negatively affect patient care, this one likely has the most bang for the buck. Whether we need to search for changes that can affect chemotherapeutic regimens or determine if a pulmonary embolus is acute or chronic, we can severely decrease pathology detection and change patient management when we neglect priors. It is certainly worth the extra time to look at the prior studies!

Not Reading The Prior Reports

Just as critically, it is not just about searching the priors but also about reading the previous reports. I can’t tell you how often I have discovered items in the information that are the reason for performing the following study that may not be so obvious if you don’t read the prior dictation in addition to looking at it. It could be an incidental tiny pancreatic cyst or a subtle rib sclerotic rib lesion that you might not realize by just skimming the previous images . In either case, you must also make sure to peruse the prior reports to maximize sensitivity.

Using The Correct Software For Imaging

It is effortless to skimp on interpreting images when the programs are slow or unwieldy. However, we are obligated to look at studies in a way that will maximize sensitivity. That may involve looking at a PET scan on the appropriate interpretation platform or using the reconstruction software for coronary artery CTAs. If you skimp on this step, you are much more likely to miss disease that can negatively affect patient management.

Windowing/Protocols

It is much easier to go through a study if you don’t take the time to go through bone and liver windows on a CT scan or neglect the diffusion-weighted sequences on an MRI of the abdomen. However, by forgoing these steps, you are also sacrificing sensitivity. Sure, it’s nice to get home a bit earlier. But is it worth the outcome of missing a liver lesion or a hidden enlarged abdominal mesenteric lymph node?

Not Waiting For All The Images To Arrive

I get impatient when the computer sends the studies over slowly. That happens to almost everyone once in a while. And, it is very tempting to interpret the images based on the images that you have alone. But, for instance, axial CT scans images without the coronals, and sagittal can cause you to miss compression fractures, renal masses, and more. Don’t skimp on the waiting for these last images to cross over.

Skimping on Sensitivity!

We, radiologists, have taken a Hippocratic oath. This oath obliges us to do no harm. Although we are under pressure to complete all our cases, we must best answer the clinical question appropriately without sacrificing sensitivity. Or else the study can become worthless or, even worse, harmful to the patient. So, make sure to cross all your t’s and dot all your i’s by checking for priors, using the correct software, looking at all the windows/sequences, and not being impatient before interpretation. These are simple ways to increase our sensitivity and ultimately improve patient care!

 

 

 

 

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The Magic Of Priors

magic

As I was scrolling through the worklist, I came across a case with priors that significantly changed the disposition of a patient, emphasizing the magic of priors. A chest CTA showed numerous pulmonary emboli sitting in multiple branches of the pulmonary arteries. At first glance, any radiologist would be ready to pick up the phone and call the ER to let them know about the pulmonary emboli. Of course, this patient would most likely need anti-coagulation and possibly thrombolysis. But then, at the very end of the list of prior studies, I noticed a previous chest CTA from 2017. To my surprise, the images looked the same. Those bilateral pulmonary emboli were most likely chronic! No new treatment would likely be necessary. If you want to talk about why priors are so important, this is an excellent example of why. It entirely changed the management of this patient. And it is the proverbial tip of the iceberg. So, if you ever get that feeling of laziness, here are some reasons it pays to take the time to press on and look at the patient’s prior studies.

Increases Sensitivity

No, it is not cheating to look at the prior report. Instead, it is excellent patient care. Some lesions, for instance, pancreatic lesions, can be very subtle. And, if you don’t look back at the prior report and the prior study, you are much more likely to miss it. You may neglect to recommend follow-up on this sort of lesion. And, in this case, you never know what can happen next. It can grow and need further treatment or not. Regardless, why not increase your chances of picking up significant findings?

Increases Specificity

Let’s give the example of that lowly nonspecific liver lesion that we always seem to find. The second time around, the diagnosis can become a lot more specific. If the lesion has been stable for the past ten years, it is highly likely to not be malignant. And, you have made of critical management decision of leaving the lesion alone. Otherwise, a whole workup can ensue, wasting health care dollars and causing potential psychological discomfort to the patient. These issues happen all the time, so don’t forget to compare to the priors.

The Magic Of Priors Changes Patient Treatment

I can’t tell you how often I get calls from oncologists that fail to give us the most recent priors, subsequently add them to our system, and then request an addendum. Why is that, you might ask? Well, most oncologists know the value of comparing to priors. How would you know whether to continue on a chemotherapeutic regimen or not? In an imaging study, learning if there is improvement, stability, or progression takes the guesswork of how to treat the patient next. And this is not to mention the potential life-saving acute issues I mentioned with the chronic PE case at the beginning!

Increases Referring Physician Confidence

Knowing that you have an eye on the previous study on all your reports allows your referrers to feel comfortable that you are safely and methodically correctly interpreting images. Of course, this step can lead to a virtuous circle. You get more patients referred because you increase clinician confidence and patient well-being. And, you earn a better living. It’s all good!

The Magic Of Priors

One of the big life lessons of practicing radiology for so many years is to avoid neglecting prior studies. I have seen one too many cases slip through the cracks, and I certainly don’t want the same to happen on my watch. And, I am sure that you probably don’t want that on yours. So remember why the magic of priors is so essential- increasing sensitivity and specificity, changing patient management, and increasing clinician confidence. And, you should make it part of your standard protocol never to forget to look at them too!

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Forgot To Look At The Priors? Disasters Can Happen!

priors

There are a few tenets in radiology that are unbreakable. One of these doctrines is to always look for priors. So, what are some real stories about what can happen to you if you forget them? To bring home this point, I will give you four examples of what can happen if you leave out the prior exam. The results speak for themselves. And these are just the tip of the iceberg!

The Phlebolith That Just Gets In The Way

New radiologists, especially, will often have a disease called happy eye syndrome. They make a diagnosis and forget about everything else. One of these critical steps they forget is remembering to look at priors. And, one such resident happened to do just that. One night, a resident saw a calcification probably in line with the ureter. And the urinary tract collecting system was slightly prominent. And, she called it an obstructing 6 mm stone.

The next day, the overnight attending looked at the case and saw the same calcification at the same location four years ago on a previous with and without contrast CT scan. And, it was not even associated with the ureter!

So, what happened to the patient? The surgeon sent the patient for surgery. But fortunately for the patient, they never got to operating suite. A well-placed phone call from the morning attending prevented an unnecessary operation. But, that was surely a close one!

The Overnight V/Q Scan- Not Just A Harmless Test!

Very commonly, the resident at nighttime use the V/Q scan as a means to sharpen their skills. But, it is not necessarily a safe test if not used the right way. One night, a resident called multiple mismatches at both lungs with a negative chest x-ray as a study highly suspicious for pulmonary embolus. And, correctly so, of course, if they didn’t have the priors!

So, the overnight physician started the patient on a course of coumadin. Guess what? The next day before the attending came into the hospital; this patient developed a change in mental status. And, the CT scan showed a focal hemorrhage. Now, whether the cause of the bleed was this coumadin dosage is debatable. But, once again, it demonstrates the power of the prior!

The Angry Oncologist (And Patient)

Typically, oncologists order studies to decide whether or not their patients should get a change in chemotherapy. In one such case, one attending read a lung cancer oncology chest, abdomen, and pelvis. There were lesions in the bone, liver, and lung. He reported the results, never bothering to check the script and the request for comparison to priors.

It turns out this patient was on an experimental protocol that demanded precise timepoint interpretations compared to the previous study. Due to the lack of description of change on the CT scan compared to the priors, the oncologist could not determine what to do next. Since the new results did not come back until after the deadlines, the study removed the patient from the treatment protocol! Bye-bye successful therapy!

The Thyroid Nodule From Hell

Thyroid nodules seem to be a common indication for a thyroid ultrasound. And, many of us consider ultrasound to be a relatively benign informative examination. But, so not so much for this next unfortunate bloke.

One radiologist interpreted an ultrasound thyroid examination as a suspicious 1.5 cm nodule at the right lower pole of the thyroid. And, he decided to recommend a biopsy. Of course, in small letters at the bottom of the technologist’s report, the technologist said the patient has two different MR numbers, and please compare these to the priors. Unfortunately, the radiologist missed this statement.

So, the endocrinologist sent the patient for a biopsy. Also, unbeknownst to the interventional radiologist, the patient never knew that the patient had priors. Well, what happened? Of course, the radiologist completed the biopsy, and the patient developed a large hematoma in the neck with associated complications. And, only afterward, the referring physician realized that the patient did have another study. Guess what, the nodule was stable all along and didn’t need a biopsy. The patient was stuck with a needless nasty hematoma!

Priors: Don’t Forget Them!

I think you get the point. But as painful as it may be to hear the same recommendation again, it is worth repeating over and over, don’t forget the priors. These are just a few of the potential disasters that lie in wait for you if you break this tenet of radiology. And, it’s a great way to disrupt the chain of excellent patient care!