Pulmonology focuses on diagnosing and treating lung and airway conditions such as asthma, COPD, and pneumonia, as well as overall respiratory health.
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Pulmonary edema is a serious condition where too much fluid builds up in the air sacs (alveoli) of the lungs. This extra fluid makes it hard for oxygen to get into the blood and for carbon dioxide to leave. Normally, the alveoli stay dry because of a careful balance of pressures in the lung’s blood vessels and the steady work of the lymphatic system. If this balance is lost, fluid leaks into the lung tissue and then into the alveoli. This blocks gas exchange, causing low blood oxygen and trouble breathing. At Liv Hospital, we see pulmonary edema as a complex problem with many possible causes, so it is important to identify and treat it quickly to prevent respiratory failure.
To clearly explain pulmonary edema, it helps to know about the Starling forces that control how fluid moves in the lungs.
The most common cause of pulmonary edema is higher pressure in the lung’s blood vessels. This pressure pushes fluid out of the vessels and into the lungs. It often happens in heart failure, especially when the left side of the heart is weak. If the left ventricle cannot pump blood well, pressure builds up in the left atrium and then in the lung veins and capillaries. This extra pressure forces fluid into the air sacs, and the lymphatic system cannot keep up.
Another main cause is when the barrier between the air sacs and blood vessels becomes more permeable. In conditions like Acute Respiratory Distress Syndrome (ARDS) or severe infections, this barrier gets damaged and lets protein-rich fluid leak into the alveoli, even if the pressure is normal. This type of edema is harder to treat because the lung tissue is injured and inflamed.
This type of pulmonary edema is mainly caused by problems with how the heart works.
In these cases, the heart is not the main cause. Instead, the lung tissue is damaged or outside factors are involved.
The lymphatic system plays an important but often overlooked role in preventing edema.
This is a sudden and severe form of cardiogenic pulmonary edema.
It is important to tell the difference between pulmonary edema and pleural effusion, even though they can happen together.
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CT scans use X-rays to create detailed cross-sectional images and are excellent for visualizing kidney stones, detecting tumors, and evaluating traumatic injuries. They are fast and widely available. MRI uses strong magnetic fields and radio waves to produce detailed images of soft tissues, making it superior for staging prostate cancer, evaluating bladder wall invasion, and assessing pelvic floor disorders without ionizing radiation.
Contrast dye, usually iodine-based, is injected into a vein to highlight the blood vessels and urinary tract organs. As the kidneys filter the dye from the blood, it opacifies the urine. This allows the radiologist to see the internal structure of the kidneys, the ureters, and the bladder clearly, revealing blockages, tumors, or structural abnormalities that would be invisible on a non-contrast scan.
Multiparametric MRI is an advanced imaging technique that combines standard anatomical sequences with functional sequences like Diffusion-Weighted Imaging and Dynamic Contrast-Enhanced imaging. This provides a comprehensive assessment of the prostate, allowing doctors to distinguish between benign conditions like BPH and significant prostate cancer, and to guide targeted biopsies.
CT scans do involve exposure to ionizing radiation, which carries a small theoretical risk of cellular damage over time. However, modern CT scanners use dose-modulation technology to minimize this exposure to the lowest level necessary for a diagnostic image. The benefit of an accurate and timely diagnosis for serious urological conditions typically far outweighs the minimal risk of radiation.
Many modern orthopedic implants are MRI-safe, although they may cause some image distortion. However, older pacemakers, defibrillators, and certain metal clips may be unsafe in the strong magnetic field. It is critical to inform the imaging team of any metallic implants so they can verify their safety compatibility or recommend an alternative test like a CT scan.
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