U-M Team Designs an App for HHT Patients

A Michigan Medicine professor and a U-M medical student created an app to help patients manage HHT, a systemic blood vessel disorder characterized by excessive nose bleeding.

9:45 AM

Author | Rene Wisely

Help for a rare genetic blood vessel disorder that can attack the nose, brain and lungs is available at the touch of a finger.

A new free app, My HHT Tracker, helps patients with hereditary hemorrhagic telangiectasia (HHT), or Osler-Weber-Rendu syndrome, a little-known genetic disorder in which blood vessels develop improperly and are prone to bleeding, especially from the nose.

The disease is not typically life-threatening if the patient knows about the disorder and the symptoms are managed, monitored and treated by an HHT expert.

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Cue the app. University of Michigan's Jeffrey Terrell, M.D., a professor of otolaryngology (also known as ENT, for ear, nose and throat) and associate chief medical information officer, and U-M medical student Seth Klapman conceived of the app as a way for patients to better manage their symptoms.

"A lot of young people are in denial because they aren't showing symptoms," Terrell says. "Because young people are always on their phone, we can engage them with the app and have them read and understand HHT to discover why they need the screening tests, because these screening tests can save a lot of lives."

Cure HHT, a Maryland-based advocacy group dedicated to finding a cure for the blood disorder, funded the project and worked with Arbormoon Software Inc. in Ann Arbor, Michigan, to build and launch the app in the Apple App Store.

Sharing data

The app logs a patient's HHT health data, such as blood counts and oxygen levels, organizes medical tests and results, shares data with a health care team, monitors how a patient is feeling, tracks nosebleeds (both in severity and frequency) and produces charts that show the effectiveness of treatments.

It also will remind users to record any nosebleeds that occurred that day in the Bleed Journal or to make appointments for annual tests to keep HHT symptoms from creating bigger problems such as aneurysms or strokes.

Diagnosis delay

Awareness is key. The average diagnosis delay is 27 years, according to Cure HHT. It affects 1 in 5,000 people worldwide, but because 90 percent of people with HHT are undiagnosed, that figure may be closer to 1 in 3,000, it says.

And despite it being as common as cystic fibrosis, the disorder is not well known, even in emergency rooms. Terrell knows doctors who say HHT received one sentence in their medical textbooks.

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Treatment can be as simple as humidification and lubrication, using saline and Vaseline to increase nasal moisture, Terrell says. He is often the first HHT expert patients see at Michigan Medicine because of his 20-year experience treating the disorder.

But some patients experience daily nosebleeds or lose so much blood that they develop anemia or require transfusions.

Learning improves treatment

One of Terrell's favorite components of the app is the educational section of the FAQ. It offers in-depth information about the nuances of the condition and guidance on how to manage it.

Users learn, for instance, the root of the excessive bleeding. Patients with HHT typically have two types of blood vessel abnormalities. The smaller ones can be seen in the skin, appearing as red or purple dots the size of a pinhead. They are called telangiectasia and are found on the hands, face, mouth, lips or inside the nose. The larger blood vessel abnormalities, arteriovenous malformations (AVMs), hide elsewhere in the body but favor the nose, lungs, gastrointestinal tract, brain and liver. Complications from nosebleeds and AVMs can be life-altering or life-threatening for patients, but awareness and treatment greatly reduce those risks.

Receiving help outside of an appointment

My HHT Tracker allows Terrell to nearly clone himself, he says. He has recorded YouTube videos to help people understand the app and how managing the symptoms results in better outcomes.

"I love teaching patients, but during an office appointment I can only teach one person at a time," he says. "We need to get information about HHT out there to educate more people, and this app is one way to do that."

SEE ALSO: Otolaryngology Residents Practice Real-Life Scenarios at 'Boot Camp'

When the app launched in October, nearly 400 people downloaded it in the first three weeks, he says.

While the initial release is only available on the iOS platform, Terrell and Cure HHT are exploring an Android version.

"The app is a nice solution that helps patients feel in control of their HHT," Terrell says.

To make an appointment with HHT expert Jeffrey Terrell, call 734-936-8051 or Michigan Medicine's patient care coordinator at 734-763-6510.

Signs and symptoms

HHT has a nickname: the "great masquerader." Its symptoms can disguise themselves as anemia, migraine, asthma, stroke, congestive heart failure or liver cirrhosis, says Michigan Medicine's Jeffrey Terrell, M.D., a professor of otolaryngology. This is why clinicians often misdiagnose patients. The disease's blood vessel abnormalities cause:

  • Nosebleeds
  • Shortness of breath, exercise intolerance and fatigue
  • Iron deficiency and anemia
  • Migraines
  • Seizures
  • Gastrointestinal bleeding
  • Stroke
  • Heart failure

Men, women and children from all racial and ethnic groups may have HHT, Terrell says.


Patients are their own best advocates, since this disease is often misdiagnosed, Terrell says.

If you are having frequent nosebleeds, he suggests heading to an ear, nose and throat specialist and asking specifically about HHT, particularly with these symptoms:

  • Nosebleeds daily or weekly for months or years
  • Family member who has had similar nosebleeds or a family member with HHT
  • Skin lesions that look like telangiectasia
  • Long history of nosebleeds so severe that blood transfusions are required

More Articles About: Health Tech Blood Disorders (Hematology) Health Care Delivery, Policy and Economics Ear, Nose & Throat Genetic Disorders Wellness and Prevention Emerging Technologies Genetics
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