Lungs is strong health is strong

 

Lungs is strong health is strong

Spirometry is a test of how well your lungs are working, by measuring how fast and how much air you can breathe in and out. Normally as you breathe in, or inhale, air moves freely through your trachea, or windpipe, then through large tubes called bronchi, smaller tubes called the bronchioles, and finally into tiny sacs called alveoli. Small blood vessels, called capillaries, surround your alveoli. Oxygen from the air you breathe passes into your capillaries. Then carbon dioxide from your body passes out of your capillaries into an alveolus. You get rid of the carbon dioxide when you breathe out, or exhale. Diseases such as asthma, bronchitis, and pulmonary fibrosis narrow your bronchioles, reducing the amount of air going into your lungs. And diseases such as lung cancer and emphysema damage your alveoli, reducing the amount of oxygen in your blood. These diseases can make it hard for you to breathe. Your doctor may recommend a spirometry test to identify a disease in your lungs, check the severity of your existing lung disease, or to determine if the medications you take are helping. During the test, your caregiver will use a device called a spirometer. A spirometer is a machine that measures the air you breathe out. Before you take the spectrometry test, you will sit in a comfortable chair with your feet flat on the floor. If you have dentures, you may be asked to remove them. For best results, you will be advised to follow your caregiver's instructions exactly. To start, you will raise your head and chin so that you can breathe easily. Next, you will place a clip on your nose to prevent air from coming out of your nostrils. Then, you'll take a deep breath, filling your lungs completely with air, and hold it.

             

You will place the spirometer's mouthpiece between your teeth and tightly seal your lips surround it. Finally, you will blast the air out of your lungs as hard and as fast as you can, continuing to breathe out until your caregiver tells you to stop. If you are an adult, you will blow for at least six seconds. Children 10 years old and under will blow for three seconds. You will need to perform the spirometry test correctly three times to get accurate results. Ventilator In the 16th century, Flemish physician Andreas Vesalius described how a suffocating animal could be kept alive by inserting a tube into its trachea and blowing air to inflate its lungs. In 1555, this procedure didn’t warrant much acclaim. But today, Vesalius’s treatise is recognized as the first description of mechanical ventilation— a crucial practice in modern medicine. To appreciate the value of ventilation, we need to understand how the respiratory system works. We breathe by contracting our diaphragms, which expands our chest cavities. This allows air to be drawn in, inflating the alveoli— millions of small sacs inside our lungs. Each of these tiny balloons is surrounded by a mesh of blood-filled capillaries. This blood absorbs oxygen from the inflated alveoli and leaves behind carbon dioxide. When the diaphragm is relaxed, the CO2 is exhaled alongside a mix of oxygen and other gases. When our respiratory systems are working correctly, this process happens automatically. But the respiratory system can be interrupted by a variety of conditions.

             

Sleep apnea stops diaphragm muscles from contracting. Asthma can lead to inflamed airways which obstruct oxygen. And pneumonia, often triggered by bacterial or viral infections, attacks the alveoli themselves. Invading pathogens kill lung cells, triggering an immune response that can cause lethal inflammation and fluid buildup. All these situations render the lungs unable to function normally. But mechanical ventilators take over the process, getting oxygen into the body when the respiratory system cannot. These machines can bypass constricted airways, and deliver highly oxygenated air to help damaged lungs diffuse more oxygen. There are two main ways ventilators can work—pumping air into the patient’s lungs through positive pressure ventilation, or allowing air to be passively drawn in through negative pressure ventilation. In the late 19th century, ventilation techniques largely focused on negative pressure, which closely approximates natural breathing and provides an even distribution of air in the lungs. To achieve this, doctors created a tight seal around the patient’s body, either by enclosing them in a wooden box or a specially sealed room. Air was then pumped out of the chamber, decreasing air pressure, and allowing the patient’s chest cavity to expand more easily. In 1928, doctors developed a portable, metal device with pumps powered by an electric motor. This machine, known as the iron lung, became a fixture in hospitals through the mid-20th century. However, even the most compact negative pressure designs heavily restricted a patient’s movement and obstructed access for caregivers. This led hospitals in the 1960’s to shift towards positive pressure ventilation.

For milder cases, this can be done non-invasively. Often, a facemask is fitted over the mouth and nose, and filled with pressurized air which moves into the patient’s airway. But more severe circumstances require a device that takes over the entire breathing process. A tube is inserted into the patient’s trachea to pump air directly into the lungs, with a series of valves and branching pipes forming a circuit for inhalation and exhalation. In most modern ventilators, an embedded computer system allows for monitoring the patient’s breathing and adjusting the airflow. These machines aren’t used as a standard treatment, but rather, as a last resort. Enduring this influx of pressurized air requires heavy sedation, and repeated ventilation can cause long-term lung damage. But in extreme situations, ventilators can be the difference between life and death. And events like the COVID-19 pandemic have shown that they’re even more essential than we thought.

Because current models are bulky, expensive, and require extensive training to operate, most hospitals only have a few in supply. This may be enough under normal circumstances, but during emergencies, this limited cache is stretched thin. The world urgently needs more low-cost and portable ventilators, as well as a faster means of producing and distributing this life-saving technology.