Month: July 2022

Loud snoring, grunts, and gasps can be a sign of obstructive sleep apnea, a serious disorder that causes repeated, brief pauses in breathing (apneas) throughout the night. It can leave people drowsy and depressed, and put them at risk for high blood pressure, heart disease, and other health problems.

If this sounds like you or a bed partner, a recent spate of advertisements for a mask-free treatment for the disorder may catch your attention. Known medically as a hypoglossal nerve stimulator, the pacemaker-like device moves the tongue forward during sleep. That helps reopen a collapsed airway — the root cause of obstructive sleep apnea. But how does it compare with other treatments, and who might be a good candidate?

A second-choice therapy for sleep apnea

Marketed under the name Inspire, the device was approved by the FDA in 2014. It’s a second-choice therapy intended only for people who can’t tolerate positive airway pressure (known as PAP or CPAP), according to Dr. Rohit Budhiraja, a pulmonary and sleep specialist at Harvard-affiliated Brigham and Women’s Hospital.

“Sleep apnea causes the muscles in the back of the throat to collapse, which leads to pauses in breathing that wake you up again and again,” he says. PAP, the gold standard therapy for sleep apnea, prevents airway collapse by using a small bedside machine attached to tubing that blows air through a face mask.

This can improve a measurement called the apnea-hypoxia index (AHI) by approximately 90%, lowering it below 5 in most people. The AHI is a score that gauges the severity of sleep apnea. An AHI between 5 and 14 is considered mild; between 15 and 29 is moderate; 30 and higher is severe.

Targeting tongue muscles is less effective

Inspire targets only the muscles of the tongue rather than the entire airway, so it isn’t as effective as PAP. In fact, the company’s stated treatment goal is to lower a person’s AHI by just 50% (or below 20), although some people may do better.

Because PAP is more effective, sleep specialists encourage people to stick with it by trying different strategies. But research suggests a quarter to a third of people have a hard time using PAP (see here and here). When that’s the case, Inspire may be an alternative, says Dr. Budhiraja.

Who might consider hypoglossal nerve stimulation?

In addition to trying PAP without success, you also must

• have moderate to severe sleep apnea (an AHI score of 15 to 65)
• have a body mass index (BMI) of 32 or lower (although some centers allow BMI values as high as 35), which means the device is not right for people in some weight ranges.

If you meet these criteria, you can ask your doctor for a referral to a sleep specialist or an ear, nose, and throat surgeon. The next step is sleep endoscopy. While you are sedated, a doctor passes a small tube with a light and a tiny video camera on one end through a nostril to examine your upper airway. Up to a quarter of people have an airway collapse pattern that can’t be remedied with Inspire, Dr. Budhiraja notes. And, as noted, others have too high an AHI score to try it.

A surgical procedure requiring general anesthesia

The device is implanted during a short, same-day procedure done under general anesthesia. A generator is placed just below the collarbone, a breathing sensor at the side of the chest by the ribs, and a stimulation electrode around the hypoglossal nerve under the tongue.

As with all surgery, possible risks include bleeding and infection. Some people experience tongue weakness, which can cause slightly slurred speech and minor swallowing problems. But this usually resolves within a few days, or for most people, within a few weeks.

The device must be activated a month after surgery at a sleep laboratory. The breathing sensor monitors your breathing and, when necessary, it tells the generator to send a small electrical pulse to the electrode to make the tongue muscles contract. The stimulation moves your tongue forward so you can breathe normally.

How does it feel?

“Some people describe a mild tingling sensation, but most say the feeling is hard to describe,” says Dr. Budhiraja.

At home, you use a small remote control to turn the device on at night and off in the morning. The remote is set to gradually increase the level of stimulation once or twice a week as tolerated until you reach the highest level. You then return to the sleep lab for a study to determine your optimal range. The remote is then programmed to that range.

Some people start noticing a difference in their sleep quality even at the lowest levels of stimulation. Yearly checks are recommended thereafter, and the replaceable battery lasts about 11 years. Medicare and most major insurance plans cover Inspire.

Once it’s working, hypoglossal nerve stimulation is definitely convenient: no maintenance, cleaning, or buying supplies as required with a PAP machine. “But because Inspire is less effective, it’s not considered a replacement for PAP,” says Dr. Budhiraja.

About the Author

Julie Corliss, Executive Editor, Harvard Heart Letter

Julie Corliss is the executive editor of the Harvard Heart Letter. Before working at Harvard, she was a medical writer and editor at HealthNews, a consumer newsletter affiliated with The New England Journal of Medicine. She … See Full Bio View all posts by Julie Corliss

Asthma is the most common chronic lung disease in children. In the US, it affects about 6 million children, or about one in every 12 children.

Breathing is key to life, obviously, so asthma can make life very hard. It can make going for a walk outside feel very hard. It leads not just to visits with the doctor or to the emergency room, and to hospitalizations, but also to missed school, missed work for parents, missed events, and missed activities.

The good news is that asthma is very treatable. If parents, children, and doctors work together, a child with asthma can lead a healthy, normal life. Here’s what you need to know and do.

Know your child’s symptoms

Wheezing is definitely a symptom of asthma, but a dry persistent cough can be as well (for some children, this occurs mostly at night).

Watch for signs that a child is working harder to breathe. One sign is skin tugging inward between, on top of, or below the ribs. Difficulty talking in long sentences is another sign of this.

Some children with exercise-induced asthma avoid exercise; if your child is choosing to be less active, talk to them about why.

Know your child’s triggers

There are many different triggers for asthma, including:

• Upper respiratory infections, like the common cold. COVID falls into this category, which is why children with asthma should be vaccinated against COVID.
• Allergies, such as
  • outdoor allergens like pollen, which are often worse in the spring and fall
  • indoor allergens like dust mites or mold
  • pet dander.
• Exercise. Some children will struggle with even mild exercise, while others only have trouble with vigorous exercise or exercising when there are other triggers too (like a cold or allergies).
• Weather changes, especially to colder weather. Some children can be triggered by going into a cold, air-conditioned room.
• Stress. Stress affects our bodies in multiple ways, and in some people it can trigger their asthma or make it worse.

Understand your child’s medications

Several kinds of medicines are used to treat asthma, including:

• Bronchodilators. Examples are albuterol, levalbuterol, formoterol, or ipratropium. Known as “rescue medications,” these are inhaled and work by opening up the airways. They are given through metered-dose inhalers or a nebulizer machine. They are used when a person is experiencing symptoms.
• Inhaled steroids. These work by decreasing inflammation in the lungs and making them less likely to react to triggers. They are “controller medications” given regularly to prevent symptoms.
• Combined inhalers. These have both an inhaled steroid and a long-acting bronchodilator. They are very useful for patients with more difficult asthma. Sometimes they are used in SMART (Single Maintenance And Reliever Therapy), in which the same inhaler is used for both rescue and control.
• Oral or injected steroids. These are generally used when someone has a bad asthma attack, but some people need to take them regularly to prevent attacks.
• Allergy medications. Medicines like loratadine, cetirizine, or montelukast can be very helpful when there is an allergic component to asthma.

Some people with severe asthma need other treatments, such as allergy shots for severe allergies, or medications like dupilumab that work in the body to flight inflammation. This is far less common.

Use medication correctly

• Sometimes medications and medication regimens can be confusing. That’s why everyone with asthma should have a written Asthma Action Plan that spells out exactly what they should do and when.
• If your child uses an inhaler, make sure that they are doing it right! For most inhalers, it’s important to use a spacer, which is a tube that attaches to the inhaler and helps to ensure that the medication gets into the lungs and not just the mouth or surrounding air.
• If you have any questions about anything your child is prescribed, call your doctor.

Meet with your doctor regularly

If your child’s asthma is anything more than very mild (a few mild attacks a year), you need to check in more frequently than at the yearly checkup. Extra check-ins give you a chance to talk to your doctor about how things are going — and give your doctor a chance to tweak your child’s regimen so that your child can live the healthiest, happiest life possible.

Which, after all, is totally the point.

Follow me on Twitter @drClaire

About the Author

Claire McCarthy, MD, Senior Faculty Editor, Harvard Health Publishing

Claire McCarthy, MD, is a primary care pediatrician at Boston Children’s Hospital, and an assistant professor of pediatrics at Harvard Medical School. In addition to being a senior faculty editor for Harvard Health Publishing, Dr. McCarthy … See Full Bio View all posts by Claire McCarthy, MD

I recently learned about a study suggesting a vegan diet is an effective treatment for rheumatoid arthritis.

While that sounded intriguing, another claim made in an interview about the study really caught my attention: the lead author of the study said that physicians should encourage people with rheumatoid arthritis to try changing their eating patterns before turning to medication.

Before turning to medication? Now wait just a minute. That flies in the face of decades of research convincingly demonstrating the importance of early medication treatment of rheumatoid arthritis to prevent permanent joint damage. An increasing number of effective treatments can do just that.

In fact, there’s no convincing evidence that changes in diet can prevent joint damage in rheumatoid arthritis. And that includes this new study.

So, what did this research find? Let’s take a look.

A vegan diet for rheumatoid arthritis

Researchers enrolled 44 people with rheumatoid arthritis in the study. All were women, mostly white and highly educated. They were randomly assigned to one of two groups for 16 weeks:

• Vegan diet. Participants followed a vegan diet for four weeks, followed by additional food restrictions that eliminated foods the researchers considered to be common arthritis trigger foods. These foods included gluten-containing grains (wheat, barley, and rye), white potatoes, sweet potatoes, chocolate, citrus fruits, nuts, onions, tomatoes, apples, bananas, coffee, alcohol, and table sugar. After week seven, these foods were reintroduced, one at a time. Any reintroduced food that seemed to cause pain or other symptoms of rheumatoid arthritis was eliminated for the rest of the 16-week period.
• Usual diet plus placebo. These participants followed their usual diet and took a placebo capsule each day for 16 weeks. The capsule contained insignificant doses of omega-3 fatty acids and vitamin E.

After the first 16 weeks, participants took four weeks off, then the groups swapped dietary assignments for an additional 16 weeks.

What did the study find about the vegan diet?

The vegan approach seemed to help lessen arthritis symptoms. Study participants reported improvement while on the vegan diet, but no improvement during the placebo phase.

For example, the average number of swollen joints fell from 7 to 3.3 in the vegan diet group, but actually increased (from 4.7 to 5) in the placebo group. In addition, while on the vegan diet, participants lost an average of 14 pounds, while those on the placebo gained nearly 2 pounds.

What else do we need to consider?

While the findings sound great, the study had significant limitations:

• Size. Only 44 study subjects enrolled and only 32 completed the study. With such small numbers, it only takes a few to alter the results. Larger studies (with several hundred or more participants) tend to be more reliable.
• Lack of diversity. This trial did not include men and had mostly white, highly educated participants.
• No standard diagnosis of rheumatoid arthritis. A physician’s diagnosis was required, but there was no requirement that standard criteria be met.
• Study duration. A treatment lasting four months may seem like a long time, but for a chronic disease like rheumatoid arthritis that can wax and wane on its own, this is too short a time to make firm conclusions.
• Self-reported diet. We don’t know how well study subjects stuck to their assigned diets.
• Medication use. Study subjects took arthritis medications, though no information on specific drugs is offered. Some made dosage adjustments during the trial. While the researchers tried to account for this through a separate analysis, the small number of participants could make that analysis unreliable.
• Weight loss. Losing weight, rather than eating a vegan diet, might have contributed to symptom improvement.
• No assessment of joint damage. No x-rays, MRI results, or other assessments of joint damage were provided. That’s important, because we know that people with arthritis can feel better even when joint damage continues to worsen. Steroids and ibuprofen are good examples of treatments that reduce symptoms of rheumatoid arthritis without protecting the joints. Without information about joint damage, it’s impossible to assess the true benefit or risk of relying on a vegan diet to treat rheumatoid arthritis.

Finally, it’s unclear how a vegan diet would improve rheumatoid arthritis. This raises the possibility that the findings won’t hold up.

Should everyone with rheumatoid arthritis become vegan?

No, there isn’t enough evidence to justify recommending a vegan diet — or any restrictive diet — for everyone with rheumatoid arthritis.

That said, a plant-rich diet is healthy for nearly everyone. As long your diet is nutritionally balanced and palatable to you, I see little harm in adopting an anti-inflammatory diet. But in the case of rheumatoid arthritis, diet should be combined with medicationto prevent joint damage, not used instead of it.

The bottom line

Growing evidence suggests diet can play a role in treating rheumatoid arthritis. But it’s one thing for a person to feel better on a particular diet; it’s quite another to say diet is enough by itself.

For high cholesterol or high blood pressure, dietary changes are the first choice of treatment. But rheumatoid arthritis is different. Disabling joint damage can occur early in the disease, so it’s important to start taking effective medications as soon as possible to prevent this.

We will undoubtedly see more research exploring the impact of diet on rheumatoid arthritis, other forms of arthritis, and other autoimmune disorders. Perhaps we’ll learn that a vegan diet is highly effective and can take the place of medications in some people. But we aren’t there yet.

About the Author

Robert H. Shmerling, MD, Senior Faculty Editor, Harvard Health Publishing

Dr. Robert H. Shmerling is the former clinical chief of the division of rheumatology at Beth Israel Deaconess Medical Center (BIDMC), and is a current member of the corresponding faculty in medicine at Harvard Medical School. … See Full Bio View all posts by Robert H. Shmerling, MD