Multiple studies have shown that people with darker skin pigmentation run a higher risk of being misdiagnosed and undertreated than patients with lighter skin due to inaccurate oxygen level readings
Now, scientists at multiple institutions are working to improve the basic pulse oximeter’s design by making it capable of measuring multiple biomarkers, as well as addressing long-standing inaccuracies in the device when used on people with darker skin pigmentation.
This ongoing research demonstrates how new technologies are enabling innovators to add useful functions to standard, well-accepted devices.
Valencia Koomson, PhD (above), Associate Professor, Electrical and Computer Engineering, and head of the Advanced Integrated Circuits and Systems Lab at Tufts University, has developed a pulse oximeter that measures oxygenation in tissue, rather than in blood. Her approach could ensure patients with darker skin pigmentation will be accurately diagnosed at the point-of-care. Though generally not used in clinical laboratory settings, medical technologists will be interested to learn of these new innovations in pulse oximeters. (Photo copyright: Tufts University.)
Measuring Tissues Instead of Blood
The pulse oximeter—a device that attaches to a person’s finger—uses red and infrared light to measure blood oxygen saturation (SpO2) and display pulse rate.
Studies in 2022 that looked into how hospitals administered oxygen to different patients found that inconsistent pulse oximeter readings could cause caregivers to administer less oxygen than is actually needed to people with darker skin pigmentation.
This is because melanin in the skin can interfere with “absorption of light used to measure oxygenated blood in a person’s finger,” according to a National Science Foundation (NSF) news story. Such inaccurate pulse oximeter readings can lead to “inaccurate readings and poorer treatment outcomes” for people with dark skin tones, the NSF wrote.
“Addressing this problem will require innovation in pulse oximeter design and revised regulatory standards,” said Valencia Koomson, PhD, Associate Professor, Electrical and Computer Engineering, Tufts University, Medford, Massachusetts, in the NSF news story.
Koomson, who leads the Advance Integrated Circuit and Systems Lab at Tufts, has developed a prototype pulse oximeter device, which NSF explained, measures oxygenation in biological tissues instead of blood.
“My lab’s work on pulse oximeter devices will provide an alternative technology to address many confounding factors that affect pulse oximeter accuracy, including skin pigmentation, motion artifact, and others,” Koomson said.
National Public Radio (NPR) said Koomson’s device has built-in “technology that can measure a person’s skin tone.”
“We can send more light if there’s a higher level of melanin present, so that melanin doesn’t become a confounding factor that obscures our results,” Koomson told NPR.
Another Pulse Oximeter Redesign
Another new approach to pulse oximetry was developed at Brown University in Providence, Rhode Island.
Rutendo Jakachira, Research Assistant, School of Engineering, and a PhD student in physics, turned to new optical techniques to address the challenge of oxygen saturation levels in dark skin tones, according to a Brown University news release.
Jakachira and Kimani Toussaint, PhD, Professor of Engineering and Senior Associate Dean in the School of Engineering, say they have created possibly the first LED-based light source to emit radially polarized light.
When the LED passes light through a person’s finger, the device calculates the amount of light the hemoglobin in the blood absorbed, NPR explained.
“We did a preliminary study on about five people, and although it was a small study, the results are promising,” said Jakachira, who plans a larger study and clinical trial.
Study Suggests Patients with Darker Skin May Have Received Delayed COVID-19 Care
The researchers analyzed electronic health record (EHR) data from 43,753 patients at Sutter Health in Sacramento, California, who had SpO2 measurements done between January 2020 and February 2022, and 8,735 patients seen for COVID-19 between July 2020 and February 2021 in the hospital’s emergency department.
In their AJE paper, they wrote, “We investigated whether or not pulse oximetry systematically underestimated oxygen saturation in patients who identified as NHB [non-Hispanic Black/African-American] as compared with NHW [non-Hispanic White] counterparts. We also assessed whether or not differences in oxygen saturation measurement affected hospital admission, care delivered, or return to the hospital post discharge among patients with COVID-19.
“We found evidence of differential pulse oximeter measurement error in NHB individuals, resulting in nonrandom overestimation of blood oxygenation as compared with NHW individuals. NHB individuals were also more likely to have hypoxemia [abnormally low oxygen levels in the blood] not detected by pulse oximetry.
“For NHB patients presenting in the ED with COVID-19, we found that overestimation of oxygen saturation was associated with underestimation of the need for admission and underestimation of the need for treatment with dexamethasone and supplemental oxygen. Additionally, we observed associated delays in dexamethasone initiation and initiation of oxygen supplementation.
“There are also broader implications beyond COVID-19, as differential pulse oximeter accuracy has the potential to exacerbate disparities for any condition that relies upon blood oxygenation measurement to inform clinical decision-making.”
Importance of Accurate Readings
Developing pulse oximeters that are accurate for all people, regardless of skin tone, is clearly an important breakthrough. Medical laboratory leaders and pathologists recognize that SpO2 data—along with clinical laboratory test results—are critical for successful diagnostics and treatment. Thus, new technologies that add useful functions to well-accepted devices are positive developments and worth watching.
Funded by the CDC, the program hopes to alleviate personnel shortages in Baltimore area clinical labs while also producing a knowledge base for lab managers nationwide
Clinical laboratory managers struggling to fill vacant phlebotomy and accessioning positions will be interested to learn about a pilot program being conducted by the City of Baltimore and the University of Maryland School of Medicine to train people “for employment in hospital laboratories, phlebotomy draw sites, and reference laboratory processing centers,” according to The Elm, a publication of the University of Maryland, Baltimore.
The 14-week “Mayor’s Workforce Development Program” began on April 19 and will continue through the end of July. Participants meet twice a week for lectures and experience working with specimens in actual medical laboratories or in a “hybrid learning environment,” The Elm reported.
“I came up with the idea of doing cross-training for laboratory people and public health people in case there is another pandemic,” explained Lorraine Doucette in an exclusive interview with Dark Daily. Doucette, who is managing the pilot program, is an Assistant Professor and Medical Laboratory Science Program Director, Department of Medical and Research Technology, University of Maryland School of Medicine.
“There is already a huge shortage of laboratory people, but an enormous amount left in droves during the pandemic because they got physically burned out. Some just could not do the work anymore because of things like carpal tunnel syndrome and repetitive stress injuries,” she added.
“I’m confident that all 15 or 16 students who complete this workforce program will be employed within weeks of finishing as accessioners,” said Lorraine Doucette (above), Assistant Professor and Medical Laboratory Science Program Director, Department of Medical and Research Technology, University of Maryland School of Medicine, in an exclusive interview with Dark Daily. “This has been so successful. This is making a difference in people’s lives. This is changing them from being unemployed to actually having a career in a clinical laboratory. They love it. They are so proud of themselves.” (Photo copyright: LinkedIn.)
CDC Funding Part of National Program to ‘Enhance’ Clinical Lab Workforce
The collaboration is part of a CDC project titled, “Enhancing US Clinical Workforce Capacity.’ Doucette will receive a total of one million dollars over the course of three years to facilitate the program in stages.
“It is not necessarily an old-fashioned grant where they just gave me a pile of money,” Doucette told Dark Daily. “The CDC works with me constantly via reports and Zoom meetings.”
This CDC project is designed to both cross train clinical laboratory professionals in public health, clinical chemistry, microbiology, and hematology, as well as to train individuals in the workforce development program to become laboratory accessioners.
“They are going to be qualified to work as an accessioner in any local hospital,” Doucette noted. “The people who pick up the lab samples out of the tube system are the accessioners and there is a huge shortage of them also. We’re teaching them the basics so the more advanced lab personnel can perform the higher-level work.”
Students in the program learn all about lab safety and the proper handling of lab samples as well as proper data entry, professionalism, and how to communicate with medical and laboratory personnel. They work with urine and blood samples and fabricated spinal fluid samples.
“They are taught about the different tubes, what the anticoagulants are, what makes each tube unique, why you can’t mix samples, balancing a centrifuge, and how to properly put on and remove safety gear like lab coats, gloves, and goggles,” Doucette explained.
The Mayor’s Workforce Development Program is free for Baltimore residents looking for employment via the workforce office. The only requirements for enrolling are having a high school education and being fully vaccinated.
Phlebotomy and Additional Cross-training to Be Added
Doucette would eventually like to add a phlebotomy segment to future training sessions. “We would like to develop an additional partnership with BCCC (Baltimore City Community College) for the phlebotomy piece. That would definitely increase the people and the program’s marketability,” she said. “They could not only draw the blood, but they could also process the sample.”
After assessing the success of the current program and determining what did and did not work, there will be an additional training session held in the fall. Next year, there will be more sessions held for individuals in the workforce program and cross-training classes for current clinical laboratory professionals.
The strategy for the third year of the grant includes sharing the specifics of the program with medical laboratory professionals via the CDC’s free OneLab REACH platform. This portion includes the online delivery of documentation such as training sheets, lab exercises, Microsoft PowerPoint presentations, and videos used in both the accessioning and cross-training coursework.
“We’re going to do the OneLab REACH,” Doucette said. “I’m going to be putting it all online and marketing it all around the country in stages and increments. I will be going to a lot of professional society meetings and talking to lab managers to help them understand the concept of how this all benefits them.”
This unique collaboration between the City of Baltimore and University of Maryland School of Medicine, funded by the CDC, should help alleviate some of the clinical laboratory worker shortages that exist in the Baltimore area. Hopefully, the effort will result in additional knowledge, resources, and tools to assist medical lab managers across the country to recruit and retain talented, highly-skilled workers.
More than 10,000 doctors walked out for the second time in two months, further burdening an already overwhelmed NHS
On April 11, tens of thousands of junior doctors (similar to medical residents in the US) left their posts in British hospitals commencing a four-day walkout. The strike resulted in the cancellation of thousands of operations and appointments, as well as cancelling or delaying thousands of clinical laboratory tests and anatomic pathology readings associated with those healthcare visits and surgical procedures.
The walkout was spurred by pay concerns and working conditions and comes on the heels of a three-day strike last month. That strike had already weakened the UK’s frail National Health System (NHS), which has become inundated with appointment backlogs that predate the COVID-19 pandemic, and which has led to longer wait times to see a doctor, ABC News reported.
This latest strike was more perilous since the senior doctors who covered for their juniors during last month’s strike were previously on leave for a holiday weekend, United Press International (UPI) reported.
“These strikes are going to have a catastrophic impact on the capacity of the NHS to recover,” Matthew Taylor (above), Chief Executive of the NHS Confederation, told Sky News. “The health service has to meet high levels of demand at the same time as making inroads into that huge backlog … That’s a tough thing to do at the best of times—it’s impossible to do when strikes are continuing.” (Photo copyright: Wikimedia Commons.)
Junior Docs Cite Injustice
Junior doctors who walked out are calling for a 35% pay raise to right the wrongs of 15 years of below-inflation raises, but the government continues to argue it cannot afford to increase pay, UPI noted.
“There is nothing ‘junior’ about the work I have done as a doctor. For an hour of work that I might save a life, I can be paid 19£ [$23.65],” said Jennifer Barclay, MD, a surgical junior doctor in the UK’s North West electoral zone, in a British Medical Association (BMA) press release.
“My dad, an electrician, tells me to quit and retrain in his footsteps. I’d be earning more, have less stress, less responsibility, better hours, and a better work-life balance after three years,” she added. “Surely, this life, this training, responsibility, debt, and crushing workload is worth more than 19£ per hour? I’ll be on the picket line this week because doctors believe that it is.”
According to the BMA, newly qualified junior doctors earn just over 14£ ($17.43) per hour, ABC News reported, which added, “The doctors’ union has asked for a 35% pay rise to bring junior doctor pay back to 2008 levels.”
However, their pay demands come in the midst of a cost-of-living crisis in the UK. Inflation has risen above 10%. Paired with increases in heating costs and food prices mean that decreased wages leave many struggling to pay bills, ABC news reports.
A hard-hitting BMA advertising campaign designed to shine light on these disparities depicts three junior doctors (with one-, seven-, and 10-years’ experience) removing an appendix. The video shows that the total the three would be paid for the hour-long operation would be 66.55£ ($82.84):
Doctor with one year experience: 14.09£ ($17.54).
Doctor with two years’ experience: 24.46£ ($30.45).
Doctor with three years’ experience: 28£ ($34.85).
And this for performing a potentially life-saving procedure, the BMA stated.
In the press release, BMA Junior Doctors Committee co-chairs Robert Laurenson and Vivek Trivedi said, “It is appalling that this government feels that paying three junior doctors as little as 66.55£ between them for work of this value is justified. This is highly skilled work requiring years of study and intensive training in a high-pressure environment where the job can be a matter of life or death.”
Patient Care is Affected
Lower salaries also affect patient care levels and have led to recruitment issues, with many doctors leaving the profession, the BBC reported. “This is not a situation where we are fixed in our position. We’re looking for negotiations and Steve Barclay (UK’s Secretary of State for Health and Social Care) isn’t even willing to talk to us. He hasn’t put any offer at all on the table … there has to be two sides in the discussion,” Emma Runswick, MD, a junior doctor and deputy chairwoman of the BMA, told the BBC.
But while the junior doctors battle for wages, the government’s initial focus has been on patient wellbeing. “There will be risks to patient safety, risks to patient dignity, as we are not able to provide the kind of care we want to,” NHS Confederation Chief Executive Matthew Taylor told UPI prior to the walkout.
The timing of the walkout also caused consternation with the NHS. “Not only will walkouts risk patient safety, but they have been timed to maximize disruption after the Easter break,” Health Secretary Barclay told UPI as the walkout was announced.
Barclay also claimed the amount sought by doctors was “unreasonable” and would cause raises above $25,000 per year, UPI reported. “If the BMA is willing to move significantly from this position and cancel strikes, we can resume confidential talks and find a way forward as we have done with other unions,” he stated.
It is important to note that doctors would be pulled from picket lines if immediate danger were present due to trade union laws that say life-and-limb coverage must be provided, the BMA told the BBC.
Founder of now defunct clinical laboratory testing company was supposed to report to prison April 27, but a last-minute legal challenge has delayed that judge’s order
Anatomic pathologists and clinical laboratory leaders who are following the continuing saga of Theranos and Elizabeth Holmes may be interested to learn that the former CEO’s attorneys are making last-minute legal moves to delay her prison sentence while she appeals her guilty verdict. At the same time, Holmes appears to be on a mission to revamp her public image.
Apparently, the twists and turns in Holmes’ never-ending story are not yet over when it comes to Theranos, its maligned clinical laboratory technology, and the company’s convicted founder.
On May 7, The New York Times (NYT) profiled Holmes in a massive, 5,000-word story that attempted to portray her as a flawed businessperson who now prefers a simpler life with her partner and two young children.
“I made so many mistakes and there was so much I didn’t know and understand, and I feel like when you do it wrong, it’s like you really internalize it in a deep way,” disgraced Theranos founder Elizabeth Holmes recently told The New York Times. Anatomic pathologists and clinical laboratory directors impacted by the revelation that Theranos hide the fact that its blood testing technology was faulty may not sympathize with Holmes’ position. (Photo copyright: Stuart Isett/Fortune Global Forum.)
Legal Team Secures Last-Minute Delay in Holmes’ Surrender
Holmes admitted to the news outlet that the deep voice she used in public, along with her black turtleneck sweaters, were part of a character she created.
“I believed it would be how I would be good at business and taken seriously and not taken as a little girl or a girl who didn’t have good technical ideas,” Holmes told the NYT. “Maybe people picked up on that not being authentic, since it wasn’t.”
However, on April 26, the 9th Circuit Court of Appeals stayed her surrender date until that court rules on Holmes’ latest bid to stay free while she appeals her conviction, The Washington Post reported.
Just days earlier on April 10, a district court judge ruled that Holmes would not stay free while her appeal progresses. The 9th Circuit announcement curtailed the district court ruling. It is not known when the 9th Circuit will issue a decision in the matter.
New York Times Reports on Holmes’ Change in Personality
The somewhat odd New York Times profile of Holmes varied between reflections on her past crimes and on her current personal life, where she is known as “Liz.”
“In case you’re wondering, Holmes speaks in a soft, slightly low, but totally unremarkable voice—no hint of the throaty contralto she used while running her blood-testing startup Theranos, now defunct,” the NYT reported.
Holmes still lives in California with her partner, Billy Evans (whose parents own a luxury hotel chain), and their two children: a son who is almost two years old and a daughter born in February. She works at home for a rape-crisis hotline.
Balwani’s Role in Theranos Again Publicly Debated
In the NYT interview, Holmes talked about being raped while a student at Stanford University and about alleged abuse from her Theranos business partner and former lover, Ramesh “Sunny” Balwani.
Balwani, Theranos’ former President and Chief Operating Officer, began his 12-year, 11-month prison sentence on April 20 in a Southern California facility for his role in defrauding Theranos investors, KTVU TV reported. Balwani has also appealed his conviction on the 12 fraud charges.
Holmes reiterated to the NYT past statements she made in court that Balwani allegedly exerted social and sexual control over her when they both worked at Theranos and were in a romantic relationship.
“She lived by entrepreneurial tenets that she said Balwani told her she needed to follow in order to succeed,” the NYT reported. “These included not sleeping for more than five hours, going vegan, getting to the office daily by 5 a.m., no alcohol.”
“[I] deferred to [Balwani] in the areas he oversaw because I believed he knew better than I did,” including on clinical lab activities at Theranos, Holmes said.
Balwani’s attorneys dismissed Holmes’ allegations, as they have in the past.
Clinical laboratory professionals can reasonably make two broad observations from the continuing saga of Theranos and Elizabeth Holmes:
Justice for healthcare crimes is often deferred for those who have influence and money.
Holmes’ image overhaul may be a last-ditch effort to sway public opinion about her, in the event that she receives a new jury trial as a result of her appeal.
Dark Daily will continue to keep you updated on further developments in this case.
HIMSS names SMC a ‘world leader’ in digital pathology and awards the South Korean Healthcare provider Stage 7 DIAM status
Anatomic pathologists and clinical laboratory managers in hospitals know that during surgery, time is of the essence. While the patient is still on the surgical table, biopsies must be sent to the lab to be frozen and sectioned before going to the surgical pathologist for reading. Thus, shortening time to answer for frozen sections is a significant benefit.
This effort in surgical pathology is part of a larger story of the digital transformation underway across all service lines at this hospital. For years, SMC has been on track to become one of the world’s “intelligent hospitals,” and it is succeeding. In February, SMC became the first healthcare provider to achieve Stage 7 in the HIMSS Digital Imaging Adoption Model (DIAM), which “assesses an organization’s capabilities in the delivery of medical imaging,” Healthcare IT News reported.
As pathologists and clinical laboratory leaders know, implementation of digital pathology is no easy feat. So, it’s noteworthy that SMC has brought together disparate technologies to reduce turnaround times, and that the medical center has caught the eye of leading health information technology (HIT) organizations.
“The digital pathology system established by the pathology department and SMC’s information strategy team could be one of the good examples of the fourth industrial revolution model applied to a hospital system,” anatomic pathologist Kee Taek Jang, MD (above), Professor of Pathology, Sungkyunkwan University School of Medicine, Samsung Medical Center told Healthcare IT News. Clinical laboratory leaders and surgical pathologists understand the value digital pathology can bring to faster turnaround times. (Photo copyright: Samsung Medical Center.)
Anatomic Pathologists Can Read Frozen Sections on Their Smartphones
Prior to implementation of its 5G digital pathology system, surgeons and their patients waited as much as 20 minutes for anatomic pathologists to traverse SMC’s medical campus to reach the healthcare provider’s cancer center diagnostic reading room, Healthcare IT News reported.
Now, SMC’s integrated digital pathology system—which combines slide scanners, analysis software, and desktop computers with a 5G network—has enabled a “rapid imaging search across the hospital,” Healthcare IT News noted. Surgical pathologists can analyze tissue samples faster and from remote locations on digital devices that are convenient to them at the time, a significant benefit to patient care.
“The system has been effective in reducing the turnaround time as pathologists can now attend to frozen test consultations on their smartphone or tablet device via 5G network anywhere in the hospital,” Jean-Hyoung Lee, SMC’s Manager of IT Infrastructure, told Healthcare IT News which noted these system results:
TAT decreased from 20 minutes to 10 minutes.
Transferring scans of large frozen tissues up to three gigabyte in size is now possible through the 5G network.
Additionally, through the 5G network, pathologists can efficiently access CT scans and MRI data on proton therapy cancer treatments. Prior to the change, the doctors had to download the image files in SMC’s Proton Therapy Center, according to a news release from KT Corporation, a South Korean telecommunications company that began working with SMC on building the 5G-connected digital pathology system in 2019.
DIAM is an approach for gauging an organization’s medical imaging delivery capabilities. To achieve Stage 7—External Image Exchange and Patient Engagement—healthcare providers must also have achieved all capabilities outlined in Stages 5 and 6.
In addition, the following must also have been adopted:
The majority of image-producing service areas are exchanging and/or sharing images and reports and/or clinical notes based on recognized standards with care organizations of all types, including local, regional, or national health information exchanges.
The application(s) used in image-producing service areas support multidisciplinary interactive collaboration.
Patients can make appointments, and access reports, images, and educational content specific to their individual situation online.
Patients are able to electronically upload, download, and share their images.
“This is the most comprehensive use of integrated digital pathology we have seen,” Andrew Pearce, HIMSS VP Analytics and Global Advisory Lead, told Healthcare IT News.
SMC’s Manager of IT Planning Seungho Lim told Healthcare IT News the medical center’s goal is to become “a global advanced intelligent hospital through digital health innovation.” The plan is to offer, he added, “super-gap digital services that prioritize non-contact communication and cutting-edge technology.”
For pathologists and clinical laboratory leaders, SMC’s commitment to 5G to move digital pathology data is compelling. And its recognition by HIMSS could inspire more healthcare organization to make changes in medical laboratory workflows. SMC, and perhaps other South Korean healthcare providers, will likely continue to draw attention for their healthcare IT achievements.
