News
Stories from the front line of the lab: The impact of my lab error
Quote: “Every Med Tech has made errors in his or her lifetime. We are all human and good people make errors.”
When it comes to working with patients, whether that is in front or behind the bench, we have a heightened sense of our limitations in the workplace as we want to do no harm to those we care for. However, as much as we try to prevent mistakes, sometimes it happens unintentionally. This article describes a near miss error that could have been fatal for a 3 month old child. Was it the Tech’s fault? Are there other factors that contributed, such as being a junior employee, night shift work hours, lack of supervision and/or demanding physician?
Thankfully, the story has a happy ending. There are lessons that can be learned from hearing about another’s experience that you will want to read about. In fact, you may know the situation all too well! In addition to reminders of safety and quality control, there are workload and process considerations that can be extrapolated, and a reminder to staff and management that we need to strive to limit the possibility of such errors where we can.
MIT Developed a Paper-Based Test That Can Detect the Zika Virus
At this time, there are two common Zika testing methods that are being used:
1) examination for specific traces of antibodies against the virus in the blood stream, and
2) investigation for viral genome particle remnants in the blood stream (polymerase chain reaction test).
Given that the testing may take days to complete and the rapid co-circulating of multiple viruses in the same geographical locations, the current testing limitations need to be overcome to support at risk populations.
Researchers in North America, including MIT, have created a paper-based test to diagnose the Zika virus and distinguish it from other infections within a few hours. As a tool for the field, it can be stored at room temperature and be read with a simple electronic reader. The results have been published in the journal Cell.
The test is built off of technology developed for Ebola detection, which used a synthetic gene network embedded into paper (colour changes when activation occurs). “What’s really exciting here is you can leverage all this expertise that synthetic biologists are gaining in constructing genetic networks and use it in a real-world application that is important and can potentially transform how we do diagnostics,” states Julius Lucks, an assistant professor of chemical and biomolecular engineering at Cornell University.
Related Article: New Evidence Finds that Zika Virus Could Cause a Severe Neurological Disorder
What everyone should know about lab tests
Newly published research from the United States shows that medical errors cause a staggering 251,000 deaths per year and is the third leading cause of death after heart disease and cancer. If we define medical error as "an act of omission or commission in planning or execution that contributes or could contribute to an unintended result," it infers the inclusion of failures in lab testing as well.
It is estimated that diagnostic errors occur approximately 2 million times per year in U.S. outpatients (1 in 20 adults).
The Institute of Medicine concluded that most people will experience at least one diagnostic error in their life.
The article author suggests that there is a general misconception that laboratory tests are somehow always accurate. She writes, “Everyone should know that whether due to misuse or a failure mode, all lab tests have limitations. Some of the most common reasons include mistakes in ordering lab tests—meaning the right tests are not ordered at the right time—and problems with the accuracy, availability, and interpretation of their results. Dive into this article to find some “things to keep in mind” to help overcome some lab test-related errors.
Related Article: Medical error—the third leading cause of death in the US
Quality
Quality improvement: The process to improve patient safety
How can you improve the safety and quality of your lab? One of the first things in understanding quality improvement is to distinguish it from quality control as there is a common misunderstanding about what each of these terms mean.
Quality control methods are applied to detect analytical errors as tests are performed.
Quality improvement evaluates the performance of a system, with the goal of designing interventions to improve that performance.
How can I create a quality improvement project? As stated in the article, it begins with the selection of a quality indicator (a measurable quantity related to the IOM quality aims of safe, timely, effective, efficient, patient-centered, and equitable). If you are stuck for an idea, there are a number of standardized quality indicators for the laboratory that have been described, such as identification errors and hemolyzed or clotted samples, post-analytic quality indicators include incorrect reports or notification errors. It is important to harmonize the collection of information in a standard format to allow data to be appropriately compared against a benchmark. After a clear understanding of the data and its collection has occurred, it is possible to compare the results against intended goals to identify quality shortfalls or excessive errors (or near-misses). Continue increasing our understanding of quality improvement projects and how to implement them in the laboratory setting by reading this article in detail.
Anatomic Pathology
Swiss blood test for colorectal cancer joins race of ‘liquid biopsies’
The company Novigenix is developing molecular diagnostics using the latest predictive gene expression profiles and tumor-derived protein markers. In their first delve into diagnostic tests, they have targeted cancer as it has positive outcomes with early detection. Published in the Clinical Cancer Research journal, the company's Switzerland researchers created a study to examine and validate a novel blood test to detect colorectal cancer and adenomatous polyps (Colox®).
Using patients from multiple centres, blood samples were collected from patients referred for colonoscopy or surgery. The blood was tested using a gene panel expression in peripheral blood mononuclear cells alone or in combination with established plasma tumor markers. The 29-gene algorithm detected colorectal cancer and large adenomatous polyps (=>1cm) with 79.5% and 55.4% sensitivity, respectively, and 90.0% specificity. The addition of CEA and CYFRA21-2 markers resulted in a slight specificity increase to 92.2%. The article concludes that the Colox test outperforms other available blood tests and provides valuable initial results to marketing the test outside of Switzerland.
Molecular Biology
Blotting and probing techniques | A blog for medical laboratory professionals
Need a refresher on blotting and probing techniques for molecular diagnostics? Check out this blog to give you the information you need!
As defined by the article, blotting is a term "that refers to the process of detecting the presence and quantity of DNA, RNA, or protein in cells." A deeper examination of the three main types of blotting procedures that the author proclaims everyone in the field should be familiar with are: Southern, Northern, and Western. Three additional blotting procedures are termed Southwestern, Eastern, and Far-Eastern.
There's more information on the details behind these procedures, just open the article by clicking on the title above.
Research
Scientists are growing millions of blood cells in the lab
The Institute of Cardiovascular and Medical Sciences at the University of Glasgow began creating blood in the lab during 2007 and has since expanded their ability exponentially.
Within a year, Jo Mountford and her team produced 100,000 red blood cells which scaled to over ten billion cells within the year 2014. The extraordinary amount of blood cells were stored in 88 flasks and made up 8.8 litres of blood.
Funded by the Wellcome Trust, the project now allows universities and organizations from across the United Kingdom to produce the cells within 30-31 days. The group is able to determine which blood group they would like to create – a highlight of the process. What did they determine as the key to growing red blood cells? Manufacturing stem cells and understanding that the aim to create blood is to meet increasing pressures associated with blood transfusions (around 90 million transfusions needed worldwide each year).
Drug-like peptides show promise in treating two blood diseases
A new study announces that a synthetic peptides called minihepcidins may treat two serious and unrelated genetics blood disorders, beta-thalassemia and polycythemia vera.
In beta-thalassemia, a mutation impairs hemoglobin production which results in defective red blood cells and severe liver and heart damage. In polycythemia vera, there is an overproduction of red blood cells which gradually thickens the blood. "It seems counterintuitive that one compound could treat two diseases that are quite different, but by restricting iron absorption, it also helps to normalize red blood cell levels in animals," says Dr. Stefano Rivella, a Kwame Ohene-Frempong Chair in Sickle Cell Anemia at The Children's Hospital of Philadelphia. "If these preclinical results translate to humans, this could represent a new treatment for both disorders."
Using mice models, the results concluded that, in young mice that modelled beta-thalassemia, minihepcidins normalized red blood cell levels and relieved both anemia and iron overload. In older mice, the compound improved red blood cell production and did not interfere with a chelating drug used to remove excess iron deposits.
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