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Researchers develop smart earring to monitor skin temperature

The wearable has shown promise for monitoring signs of stress, eating, exercise and ovulation

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The Thermal Earring is a wireless wearable that continuously monitors a user’s earlobe temperature Source: Raymond Smith/University of Washington

University of Washington researchers have developed a smart wireless earring capable of continuously monitoring a user’s earlobe temperature.

In a study of six users, the Thermal Earring outperformed a smartwatch at sensing skin temperature during periods of rest.

The research, published in Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, also showed promise for monitoring signs of stress, eating, exercise and ovulation.

The smart earring prototype is about the size and weight of a small paperclip and has a 28-day battery life. A magnetic clip attaches one temperature sensor to a wearer’s ear, while another sensor dangles about an inch below it for estimating room temperature.

The earring can be personalised with fashion designs made of resin or with a gemstone, without negatively affecting its accuracy.

“I wear a smartwatch to track my personal health, but I’ve found that a lot of people think smartwatches are unfashionable or bulky and uncomfortable,” said co-lead author Qiuyue (Shirley) Xue, a UW doctoral student in the Paul G. Allen School of Computer Science & Engineering.

“I also like to wear earrings, so we started thinking about what unique things we can get from the earlobe. We found that sensing the skin temperature on the lobe, instead of a hand or wrist, was much more accurate. It also gave us the option to have part of the sensor dangle to separate ambient room temperature from skin temperature.”

Yujia (Nancy) Liu, co-lead author, who was a UW masters student in the electrical and computer engineering department when doing the research and is now at the University of California San Diego, said: “It’s a tricky balance.

“Typically, if you want power to last longer, you should have a bigger battery. But then you sacrifice size. Making it wireless also demands more energy.”

The team made the earring’s power consumption as efficient as possible, while also making space for a Bluetooth chip, a battery, two temperature sensors and an antenna.

Instead of pairing it with a device, which uses more power, the earring uses Bluetooth advertising mode — the transmissions a device broadcasts to show it can be paired. After reading and sending the temperature, it goes into deep sleep to save power.

Because continuous earlobe temperature has not been studied widely, the team also explored potential applications to guide future research. In five patients with fevers, the average earlobe temperature rose 10.62 degrees Fahrenheit (5.92 degrees Celsius) compared with the temperatures of 20 healthy patients, suggesting the earring’s potential for continuous fever monitoring.

Dr Mastafa Springston, co-author and clinical instructor at the department of emergency medicine in the UW School of Medicine, said: “In medicine we often monitor fevers to assess response to therapy to see, for instance, if an antibiotic is working on an infection.

“Longer term monitoring is a way to increase sensitivity of capturing fevers, since they can rise and fall throughout the day.”

While core body temperature generally stays relatively constant outside of fever, earlobe temperature varies more, presenting several novel uses for the Thermal Earring.

In small proof-of-concept tests, the earring detected temperature variations correlated with eating, exercising and experiencing stress.

When tested on six users at rest, the earring’s reading varied by 0.58 F (0.32 C) on average, placing it within the range of 0.28 C to 0.56 C necessary for ovulation and period tracking. A smartwatch varied by 0.72 C.

The temperature sensing earring is shown attached to a person’s ear. The portion touching the earlobe has a gemstone on it. Dangling a few centimeters below it is a pink flower made of resin.

The smart earring can be personalised with fashion designs made of resin without negatively affecting its accuracy. Source: Raymond Smith/University of Washington

“Current wearables like Apple Watch and Fitbit have temperature sensors, but they provide only an average temperature for the day, and their temperature readings from wrists and hands are too noisy to track ovulation,” Xue said.

“So we wanted to explore unique applications for the earring, especially applications that might be attractive to women and anyone who cares about fashion.”

While researchers found several promising potential applications for the earrings, their findings were preliminary, since the focus was on the range of potential uses. They need more data to train their models for each use case and more thorough testing before the device might be used by the public.

For future iterations of the device, Xue is working to integrate heart rate and activity monitoring. She is also interested in potentially powering the device from solar or kinetic energy from the earring swaying.

“Eventually, I want to develop a jewellery set for health monitoring,” she said.

“The earrings would sense activity and health metrics such as temperature and heart rate, while a necklace might serve as an electrocardiogram monitor for more effective heart health data.”

The device is not currently commercially available.

Insight

UK reviews surrogacy firm over rejected insurance claims

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The UK government is reviewing a surrogacy firm after complaints that medical insurance claims involving surrogates in Mexico were rejected.

The Department of Health and Social Care (DHSC) is considering whether UK-based provider My Surrogacy Journey should remain listed on gov.uk as one of four domestic surrogacy agencies available to intended parents.

The review follows allegations concerning its Mexican sister company, where surrogates are based.

Health minister Diana Johnson said: “The department is looking into the allegations about My Surrogacy Journey.

“As part of that assessment, the department will consider whether it is appropriate for that company to remain on the gov.uk list of agencies.”

Emails sent by My Surrogacy Journey chief executive Michael Johnson-Ellis and seen by the Guardian suggest multiple surrogate women in Mexico had their insurance claims rejected.

The emails also suggest 300 couples using the company were moved to a new insurance provider because of the increased risk of claims being rejected.

Commercial surrogacy is banned in the UK, where only altruistic arrangements are permitted.

My Surrogacy Journey operates a not-for-profit UK branch alongside for-profit sister companies in Mexico and the US. All three companies have the same owners and chief executives.

The reported insurance issues relate to surrogacy arrangements in Mexico.

One couple told the Guardian they paid tens of thousands of pounds to cover medical costs after their surrogate had a hysterectomy during childbirth and an insurance claim was refused.

The Guardian said it understood that at least five sets of parents said they had to cover medical costs after insurance claims were rejected.

In an email to the couple whose surrogate underwent a hysterectomy, Johnson-Ellis wrote: “We have already told you that the insurance companies have been declining some of the claims and we are actively working with the broker to get this issue resolved but you should also consider that they may not be paid out and there is nothing we are able to do to change this …

“We appreciate this is not an insignificant sum but this genuinely is out of our control.”

Johnson-Ellis also said the company had switched insurance providers, writing: “We’re also managing this for 300 other journeys, which is a complex position to be in.”

Lawyers acting for My Surrogacy Journey said the company did not comment on individual cases, but that existing insurance policies were in place and claims continued to be accepted and processed.

They said the company understood that a small number of claims had been rejected and was supporting people seeking to resolve those claims with an insurer.

Under the surrogacy arrangements, intended parents are understood to be contractually required to cover medical costs not paid by an insurer.

The couple said they had been recommended the company’s Mexico option. Its website advertises that intended parents using the route can have a baby in “under 18 months”.

They said they were told the UK route could take up to five years and that the US option was much more expensive.

Lawyers for My Surrogacy Journey said prospective parents are given information about typical timelines, costs, legal frameworks and practical considerations, and that the 18-month timeframe is indicative only.

The couple said their surrogate developed placenta accreta, a serious condition in which the placenta attaches to the wall of the uterus.

Emails from Johnson-Ellis acknowledged that the insurance provider investigated the birth after the surrogate experienced health complications.

The parents are considering legal action, while the Guardian said it understood at least four other couples were reviewing their options.

Phil Brickell, MP for Bolton West, raised concerns in parliament about a separate couple who had used My Surrogacy Journey.

He said: “Two of my constituents recently travelled to Mexico, where their children were born by surrogacy.

“Those births were facilitated by a company called My Surrogacy Journey, which is listed on gov.uk.

“While in Mexico, they had repeated traumatic experiences with the company relating to issues including insurance for their children, accusations of bullying towards staff and repeated efforts to silence any constructive criticism.

“I understand that other members of this house have received similar complaints.”

Brickell called for My Surrogacy Journey to be removed from gov.uk pending a review by the Human Fertilisation and Embryology Authority.

Lawyers acting for My Surrogacy Journey said the company was communicating with DHSC and was confident any issues could be resolved.

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Menopause

‘Limited scientific evidence’ for most menopause supplements, expert says

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Many menopause supplements contain ingredients with limited evidence for symptom relief, while formulations and prices vary widely, a study has found.

Researchers analysed 201 products sold by nine major UK retailers, comparing their ingredients, doses and monthly costs.

Prices ranged from £1.50 to £95 a month, while no single ingredient or category of ingredient was common across all products.

The study, carried out by University College London, found that 80 per cent of products contained herbs, 77 per cent contained vitamins and 74 per cent contained phytoestrogens, naturally occurring plant compounds found in foods including soy and flaxseed.

Vitamin B6 was the most common vitamin, while red clover and sage were the most frequently identified plant ingredients.

Researchers said more evidence was needed on the effectiveness and safety of supplements marketed for menopause symptoms.

Professor Joyce Harper, senior author of the study and professor of reproductive science at University College London, said: “The menopause supplement market is growing rapidly, despite limited scientific evidence that many of these products improve menopause symptoms.

“Some social media influencers promote these products as effective solutions, despite many claims not being supported by scientific evidence.

“This can contribute to the spread of misinformation and help drive a rapidly growing menopause supplement market, leading some women to spend substantial amounts of money on supplements in the hope of improving their symptoms and overall wellbeing.”

Half of the supplements did not contain vitamin D, while less than 24 per cent contained calcium.

The British Menopause Society and International Menopause Society have highlighted vitamin D and calcium as important for maintaining bone health and preventing osteoporosis after menopause.

Researchers also identified botanical ingredients that may carry risks, including black cohosh.

Poppy Sullivan, first author of the study, said: “Certain botanical ingredients in some menopause supplements may also have risks.

“Black cohosh, in particular, is known to carry a potential risk of liver toxicity.”

The amounts of vitamins and minerals included in different products also varied widely.

Sullivan said: “Some nutrients can have adverse effects when consumed in excess over time.

“For example, excessive vitamin D intake can theoretically lead to high calcium levels, which could cause adverse effects such as vomiting and confusion.”

The study found little empirical evidence supporting the effectiveness of even the most expensive products.

Researchers called for more high-quality research, including clinical trials, to determine whether menopause supplement ingredients are effective and safe.

They said the findings could also help healthcare professionals understand the wide variation in supplement formulations.

The researchers acknowledged that the analysis may not have included every menopause supplement available in the UK.

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Pregnancy

Ultrasound Direct extends Trice Imaging partnership

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Ultrasound Direct has extended its Trice Imaging partnership for three years, adding a reporting tool across its 70-clinic UK network.

The private ultrasound provider will continue using the Tricefy platform for secure image storage and patient engagement, alongside TriceIQ for efficiency and productivity analytics.

It will also introduce Trice Workspace Reporting across its network. The companies say the tool will help standardise ultrasound reporting templates and workflows and reduce variation between clinics.

Ultrasound Direct carries out an estimated 120,000 patient scans each year across services including pregnancy, fertility, women’s health, men’s health and other diagnostic pathways.

Its network uses a large pool of sonographers working across different ultrasound systems and serves referral routes including self-referring patients, GPs and commercial partners.

Mike Steward, founding director at Ultrasound Direct, said: “Having worked with Trice Imaging since 2018, we first partnered to replace manual methods of providing scan images to expectant parents with Trice’s secure electronic image-sharing platform. Today, every study performed across the Ultrasound Direct Network is recorded and stored on Tricefy, while our clinical services have expanded considerably beyond pregnancy into fertility, women’s health, men’s health and other diagnostic pathways.”

He added: “To continue futureproofing our image management strategy across a network of 70 clinics, a large team of sonographers, varying ultrasound systems and a growing number of referral partners with different needs, we decided to extend with Trice Imaging. This includes the introduction of the new Trice Workspace Reporting module to help us scale and standardise our ultrasound reporting templates and workflow, reducing variability between clinics.”

The partnership began in 2018, initially focusing on replacing manual methods of sharing pregnancy scan images with expectant parents.

Johanna Wollert Melin, founder and chief executive of Trice Imaging Europe, said: “Ultrasound Direct has been a valued partner in the UK for 8 years.”

She added: “At the heart of the relationship is a willingness to explore new ideas, test new tools and the spirit to solve real challenges across a large and complex clinical network.”

Mark A. Samii, chief revenue officer at Trice Imaging, said: “We are delighted to retain and extend our relationship with Ultrasound Direct.”

He added: “The addition of Trice Workspace Reporting addresses a challenge we hear from multi-site providers globally – keeping reporting quality consistent across many users, systems, referral or payer relationships.”

Steward said Ultrasound Direct continues to see growing demand for private diagnostics alongside NHS care from self-referring patients and an increasingly diverse range of professional and commercial referral partners.

He added: “As that development continues, scalable digital infrastructure becomes increasingly important. Our focus is on ensuring that a growing national network can support consistent clinical workflows, different referral pathways and the technology requirements of the future, while continuing to provide patients with accessible diagnostic services.”

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