A member of the medical staff treats a patient in the COVID-19 intensive care unit at the United Memorial Medical Center on July 2, 2020 in Houston, Texas. (Credit: Go Nakamura/Getty Images)

• Oxygen Level Below 90%
• Oxygen Level Of 65

Oxygen Level Guidance 90% or less This oxygen level is very concerning and may indicate a severe medical problem. Call 911 or go to your nearest emergency room immediately. You may need an urgent x-ray or heart test. 91% to 94% This oxygen level is concerning and may indicate a medical problem. Call your health care provider immediately. Low blood oxygen, known as hypoxemia, means that the level of oxygen in the blood has dropped below average, normal levels, due to one or more of many different causes. Under most circumstances, breathing room air, normal readings range from 95 to 100 percent. Levels above 90 percent are not considered low, so you probably are worrying unnecessarily.

Researchers have begun to solve one of COVID-19’s biggest and most life-threatening mysteries: how the virus causes “silent hypoxia,” a condition where oxygen levels in the body are abnormally low.

Those low oxygen levels can can irreparably damage vital organs if gone undetected for too long.

More than six months since COVID-19 began spreading in the US, scientists are still solving the many puzzling aspects of how the novel coronavirus attacks the lungs and other parts of the body.

Despite experiencing dangerously low levels of oxygen, many people infected with severe cases of COVID-19 sometimes show no symptoms of shortness of breath or difficulty breathing.

Hypoxia’s ability to quietly inflict damage is why health experts call it “silent.” In coronavirus patients, researchers think the infection first damages the lungs, rendering parts of them incapable of functioning properly. Those tissues lose oxygen and stop working, no longer infusing the blood stream with oxygen, causing silent hypoxia. But exactly how that domino effect occurs has not been clear until now.

“We didn’t know [how this] was physiologically possible,” says Bela Suki, professor of biomedical engineering and of materials science and engineering at Boston University and one of the coauthors of the study in Nature Communications.

Some coronavirus patients have experienced what some experts have described as levels of blood oxygen that are “incompatible with life.” Disturbingly, Suki says that many of these patients showed little to no signs of abnormalities when they underwent lung scans.

To help get to the bottom of what causes silent hypoxia, biomedical engineers used computer modeling to test out three different scenarios that help explain how and why the lungs stop providing oxygen to the bloodstream.

They found that silent hypoxia is likely caused by a combination of biological mechanisms that may occur simultaneously in the lungs of COVID-19 patients, says lead author Jacob Herrmann, a biomedical engineer and research postdoctoral associate in Suki’s lab.

How healthy lungs work

Normally, the lungs perform the life-sustaining duty of gas exchange, providing oxygen to every cell in the body as we breathe in and ridding us of carbon dioxide each time we exhale.

Healthy lungs keep the blood oxygenated at a level between 95 and 100%—if it dips below 92%, it’s a cause for concern and a doctor might decide to intervene with supplemental oxygen. (Early in the coronavirus pandemic, when clinicians first started sounding the alarm about silent hypoxia, oximeters flew off the shelves as many people, worried that they or their family members might have to recover from milder cases of coronavirus at home, wanted to be able to monitor their blood oxygen levels.)

The researchers first looked at how COVID-19 affects the lungs’ ability to regulate where blood is directed. Normally, if areas of the lung aren’t gathering much oxygen due to damage from infection, the blood vessels will constrict in those areas. This is actually a good thing that our lungs have evolved to do, because it forces blood to instead flow through lung tissue replete with oxygen, which is then circulated throughout the rest of the body.

But Herrmann says preliminary clinical data has suggested that the lungs of some COVID-19 patients had lost the ability of restricting blood flow to already damaged tissue and, in contrast, were potentially opening up those blood vessels even more—something that is hard to see or measure on a CT scan.

Using a computational lung model, Herrmann, Suki, and their team tested that theory, revealing that for blood oxygen levels to drop to the levels observed in COVID-19 patients, blood flow would indeed have to be much higher than normal in areas of the lungs that can no longer gather oxygen—contributing to low levels of oxygen throughout the entire body, they say.

Next, they looked at how blood clotting may affect blood flow in different regions of the lung. When the lining of blood vessels get inflamed from COVID-19 infection, tiny blood clots too small to be seen on medical scans can form inside the lungs. They found, using computer modeling of the lungs, that this could incite silent hypoxia, but alone it is likely not enough to cause oxygen levels to drop as low as the levels seen in patient data.

Silent hypoxia hides in lungs

Last, the researchers used their computer model to find out if COVID-19 interferes with the normal ratio of air-to-blood flow that the lungs need to function normally.

This type of mismatched air-to-blood flow ratio is something that happens in many respiratory illnesses such as with asthma patients, Suki says, and it can be a possible contributor to the severe, silent hypoxia that has been observed in COVID-19 patients.

The models suggest that for this to be a cause of silent hypoxia, the mismatch must be happening in parts of the lung that don’t appear injured or abnormal on lung scans.

Altogether, the findings suggest that a combination of all three factors are likely to be responsible for the severe cases of low oxygen in some COVID-19 patients.

By having a better understanding of these underlying mechanisms, and how the combinations could vary from patient to patient, clinicians can make more informed choices about treating patients using measures like ventilation and supplemental oxygen.

Oxygen Level Below 90%

Researchers are currently studying a number of interventions, including a low-tech intervention called prone positioning that flips patients over onto their stomachs, allowing for the back part of the lungs to pull in more oxygen and evening out the mismatched air-to-blood ratio.

“Different people respond to this virus so differently,” Suki says. For clinicians, he says it’s critical to understand all the possible reasons why a patient’s blood oxygen might be low, so that they can decide on the proper form of treatment, including medications that could help constrict blood vessels, bust blood clots, or correct a mismatched air-to-blood flow ratio.

The National Heart, Lung, and Blood Institute supported the work.

Source: Boston University

Low oxygen levels will rob you of your eye sight, short term memory, and your energy. Eventually low oxygen levels will weaken your heart muscle.

Heart Failure IS -> Progressive weakening of your heart muscle! (Read that sentence again. It is that important.)

The world is facing an epidemic of heart failure! This ONE health crisis will rob more productive work years from Americans than any other.

Why should you be concerned about oxygen?

Oxygen isn’t typically something you worry about. If you are looking into “low oxygen levels”, you likely heard the term from your doctor. As the caregiver of a loved one, you
might become familiar with the importance of oxygen as a life saving requirement, but fail to realize how effective it can be in minimizing discomfort and maintaining quality-of-
life.

Everyone worries about high blood pressure, carrying extra weight and other issues routine blood work can reveal. It’s all part of the natural aging process and your growing
concern for your health. After all, you don’t ignore your bad health until it kills you if you know better, right?

Being over-weight increases your risk for many diseases, especially heart disease. So, you diet and attempt to get “regular exercise”. Maybe you join a gym, or consider
gastric bypass surgery. You do what it takes because health is important.

High blood pressure is called the silent killer, because it can be deadly without symptoms. Most people know that it’s important to get their blood pressure checked
regularly, just to be safe.

You’ve been told you should worry about your cholesterol levels. Everybody seems to know that reducing your bad cholesterol is important, so your doctor will likely offer
you a prescription to lower your cholesterol if it is elevated. Even if your cholesterol isn’t elevated, your doctor may prescribe Statin medication as a “precaution” when you
have other risk factors for heart disease. (That so called preventative medication might not be such a good idea.

There are plenty of risk factors to worry about. Why add oxygen to the list?

If your doctor is expressing concern about your blood oxygen levels, you should be concerned, too.

You may be inclined to argue with your doctor if he/she would like to see you using oxygen 24 hours a day. It’s fair to say that round-the-clock oxygen therapy is inconvenient and irritating.

Oxygen Level Of 65

It’s also difficult to understand why it is necessary.

What is there to be concerned about?

Consequences of Low Blood Oxygen Level:

• damage eye sight
• deteriorate short term memory
• weaken muscle (your heart is a muscle)
• increase pain
• reduced clarity/focus
• loss of your natural charming disposition
• potentially create life threatening cranial nerve stimulation

Since low-flow home-oxygen is completely safe and doesn’t cause side-effects you are better off to use it than to resist using it and suffer the consequences of low blood oxygen. It isn’t an easy to swallow pill, but it might just be more important than every pill in your pill box.

Oxygen is one prescription you don’t want to second guess.

If your doctor wants you on oxygen, you are crazy to argue.

Does your doctor monitor your blood oxygen levels routinely?

Not all doctors have oximeters (oxygen measuring devices) in their office. If they don’t have one, they have no way to routinely monitor your oxygen level during your physicals, check-ups and illness related appointments.

This isn’t at all unusual. Even if doctors have oximeters, they may not use them unless you have some sort of breathing complaint. It isn’t widely understood, even with doctors, that low oxygen is most often NOT accompanied by shortness-of-breath.

It isn’t at all uncommon for doctors and nurses to minimize the importance of oxygen therapy and to dismiss low oxygen readings if they only last a short period of time.

This approach is much like waiting for things to get worse.

Whether your doctor monitors your blood oxygen level or not, YOU SHOULD.

There is no doubt about it. Taking an active role in your health care can cause you more stress than putting blind trust in your doctor, but if your doctor doesn’t offer you thesolution you need, who will?

Doctors are making educated guesses and doing the best they can. Luckily they also have the benefit of a well educated team with many years of combined experience. Good health care requires team work. It can be tempting to allow your doctor to lead the team but NO ONE is more motivated and invested in finding solutions to your suffering than YOU are.

It’s important for you to be aware that your participation is the key to positive results.

Certainly, if your health care team doesn’t successfully uncover the cause of your suffering and eliminate it or otherwise address it, you are the only one who will suffer the consequence. Ultimately, you pay the price for oversights and mistakes.

Unfortunately, low blood oxygen causes devastating consequences.

If your doctor is advocating for oxygen therapy, you are fortunate. Most doctors overlook the harm low oxygen levels are causing and shrug off the importance of monitoring and meeting oxygen needs.

Good quality-of-life is your goal. The damage caused by low oxygen levels prevents you from functioning the way you normally would. How much joy would you lose if your
eyesight slowly deteriorated?

As you age, you tend to think you are just getting old and out of shape. The progressive muscle weakening caused by low oxygen levels effects your heart muscle. When your
heart muscle is weakened by low oxygen levels your whole world changes, but it doesn’t typically happen all of a sudden.

When you suffer a heart attack part of your heart muscle dies. With congestive heart failure things [more often than not] happen very slowly. The progressive weakening of your heart muscle is gradual. For years your doctor will tell you “your heart is fine”.

Once you know you are living with congestive heart failure, you should understand that oxygen is the key to protecting your weakened heart muscle and to strengthening it.

Low oxygen is a BIG deal.

If your low oxygen levels are caused by lung disease, it’s important to remember that keeping your blood oxygen level above 92% is important to protect your heart.

If your low oxygen levels are caused by heart disease, it’s important to remember that failing to address low oxygen levels will further weaken your heart muscle.

So how low is too low?

7 Facts to Remember About Blood Oxygen Saturation Levels

1. When oxygen saturation levels fall below 92%, the pressure of the oxygen in your blood is too low to penetrate the walls of the red blood cells. It is a matter of gas laws.

2. Your insurance company may not pay for oxygen unless your levels fall to 88% oxygen saturation. This has nothing to do with what is best for you, it is just the point at which your insurance is willing to pay.

How to add more fonts to google docs. 3. Every time your oxygen level falls below 92% saturation the cells of your body are oxygen starved.

4. When you fail to meet your oxygen needs, every organ in your body suffers the consequences.

5. Low oxygen levels may be present only at certain times.

• when retaining excessive fluid

• when airways are reacting to irritants

• with respiratory illness

• sleep apnea

• about 3:00am when you wake gasping for air

• with activity when your heart muscle has become weak, though isn’t technically “congestive heart failure”…. yet

6. Recurring low oxygen levels are harmful and should be treated with supplemental oxygen.

7. The problem is that your doctor may not witness your oxygen levels at 88%, and if he doesn’t see that reading on an oxygen meter (oximeter), then most insurance companies will not pay for it, and therefore doctors don’t order it.

Low oxygen levels are definitely something to worry about!

If you feel you may be experiencing low oxygen levels be sure to ask your doctor to check your pulse oximetry reading.

Symptoms of low oxygen are:

• shortness of breath/ difficulty breathing/ dyspnea
• extreme fatigue
• chest tightness
• mental confusion
• tingling fingers
• water retention (especially feet/ ankles)
• chronic cough

If you are experiencing blood oxygen saturation levels below 92% now, waiting for your doctor to witness it below 88% and order oxygen is equal to sitting around waiting to get worse.

Are you concerned?

Google+ Comments