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Dr. Osama Muneer Ahmed, MD is a retina specialist in Washington, DC specializing in vitreoretinal diseases (retina and vitreous). He graduated from Yale School of Medicine in 2021 and has 5 years of experience. Dr. Osama Muneer Ahmed, MD is affiliated with Luminis Health, MedStar Washington Hospital Center and MedStar Health.
Angiogram (Angiography)
Angiography is the use of x-rays to examine blood vessels, especially in order to identify any blocked or misshapen vessels that may cause problems. The test itself is called an angiogram. Some of the disorders that angiograms can be used to diagnose include:
During an angiogram, the doctor inserts a very thin, flexible tube called a catheter into a blood vessel through an opening in the groin or arm. The catheter is threaded through the body to the site of the suspected problem, where a small amount of dye is injected into the bloodstream and x-rays are taken. The dye makes the surrounding blood vessels visible via x-ray.
If necessary, certain procedures can be performed after an angiogram while the catheter is in place. Angioplasty is the use of a catheter to widen narrowed or blocked arteries. Stents are like tiny coiled springs that hold blood vessels open, and they can be placed during a catheterization. Damaged heart valves can also be repaired or replaced.
A typical angiogram takes about an hour to perform, but it may be longer if the catheterization is used to perform procedures on the blood vessels. It may be uncomfortable at times but is usually not painful. Afterwards, patients may be monitored for up to six hours to make sure any bleeding from the insertion site has stopped. They are given fluids to help flush the dye from their body. For a day or two after an angiogram it is important for patients to drink plenty of fluids and keep strenuous activity to a minimum.
Eyelid Reconstruction
Eyelid reconstruction is a surgical procedure to correct defects that typically arise from traumatic injury to the eye or after skin cancer removal on the eyelid. The surgery aims to preserve eyelid function and to improve its appearance.
The choice of reconstruction technique depends on the size and severity of the defect. If tissue loss is small to moderate, the wound may simply be sutured close. For larger defects, however, tissue from other parts of the body may be needed. Tissue may be taken (or harvested) from the ear, scalp, abdomen, roof of the mouth, inside of the check, or the eyelid itself.
The Hughes procedure and the Cutler-Beard procedure are reconstruction techniques that use eyelid tissue. In the Hughes procedure, a piece of neighboring tarsoconjunctival tissue is cut, slid onto the wound, and then sutured together. The tarsoconjunctiva is made up of the connective tissue that provides support to the eyelid, called tarsus, and the membrane covering the white of the eyes, called conjunctiva. This technique is suited for defects that are located on the sides of the eyelid. The Cutler-Beard procedure requires a thicker segment of tarsoconjunctival tissue and is used to repair defects in the center of the eyelid.
Eyelid reconstruction is commonly done at an outpatient facility. There will be bruising and swelling for about four to ten days following surgery. Patients should keep their heads elevated, use cold compress, and apply antibiotic cream on their eyelids for the first few days. Strenuous activities must be avoided for four weeks, but patients may be able to return to work after about a week.
Thyroid Problems
Thyroid problems are a group of conditions that alter hormone regulation and metabolism. The thyroid is a small, butterfly-shaped gland located in the lower neck, just below the Adam's apple (laryngeal prominence) and larynx (voice box). Despite its small size, the thyroid has an outsized effect on the body by regulating hormones that control metabolism. Metabolism is the body's process of converting consumed food into fuel to power the entire body. Heart rate, weight, cholesterol, body temperature, and even physical growth and development are all affected by the metabolism.
When the thyroid malfunctions, the body is unable to properly process and allocate energy. Thyroid problems, such as hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid), cause irregular metabolism. In some cases, the body produces antibodies that attack the thyroid cells for unknown reasons. The damaged thyroid responds by releasing either too little or too much T3 and T4 thyroid hormones. Thyroid malfunctions may also arise from genetic causes or iodine deficiency. Thyroid problems may include:
Hashimoto's is the leading cause of hypothyroidism, which is when the thyroid does not produce enough hormones to stimulate adequate metabolism. The condition is diagnosed by blood tests that measure TSH (thyroid stimulating hormone) and detect Hashimoto's antibodies. Symptoms of hypothyroidism include sluggish metabolism, inflammation, fatigue, weight gain, brittle hair, dry skin, and sensitivity to cold. To supplement impaired thyroid function, patients with Hashimoto's are typically prescribed synthetic thyroid hormone pills. Such patients may need to consume synthetic thyroids for the rest of their lives. Other treatments may include dietary changes, such as the avoidance of certain foods and medication to reduce inflammation. Frequent blood tests can inform patients if their TSH levels are within a normal range.
Grave's disease is most frequently the cause of hyperthyroidism, which is when the thyroid produces too many hormones, overstimulating one's metabolism. The condition is also diagnosed by blood tests that measure TSH and detect Grave's antibodies. Elevated heart rate, high blood pressure, sweating, bulging eyes, and weight loss are common symptoms of hyperthyroidism. Treatments for hyperthyroidism include oral radioactive iodine, which slowly shrinks the thyroid, slowing the production of excess thyroid hormone. Other anti-thyroid medications such as methimazole (Tapazole) also reduce the production of thyroid hormones. Blood pressure medications known as beta blockers can ease the increased heart rate caused by hyperthyroidism. If treatments are unsuccessful, patients may be prescribed a thyroidectomy, or surgery to remove part or all of the thyroid. Some patients with hyperthyroidism may require ophthalmological (eye medicine) treatments such as eye drops, prednisone, and surgery to reduce eye swelling and bulging.
Untreated thyroid disorders frequently lead to goiters or thyroid nodules. A thyroid goiter is a large lump that can be felt near the base of the neck and is made of swollen thyroid tissue or nodules (excess cell growth). Nodules and goiters are diagnosed by CT scan or ultrasound. Obstructive goiters can cause pain, coughing, and abnormal breathing. The most common cause of goiters is hyperthyroidism (overactive thyroid). However, Hashimoto's is also known to cause goiters or nodules. Goiters develop from continued damage from antibodies to the thyroid over time. At times, a goiter can result from a cancerous thyroid tumor. Most goiters and nodules are themselves benign.
The exact causes of thyroid cancer are unknown. People who develop thyroid cancer may or may not have another thyroid problem such as Hashimoto's or Grave's disease. Symptoms of thyroid cancer include a nodule that can be felt on the neck, hoarseness, difficulty swallowing, swelling in the neck, and neck and throat pain. CT and MRI scans are used to diagnose thyroid cancer. There are four types of thyroid cancer which vary in intensity. Thyroidectomy (thyroid removal surgery) is usually prescribed to treat thyroid cancer.
Thyroid problems are often long-term conditions that require some form of treatment. With regular monitoring and medication, many people with thyroid problems are able to lead active and fulfilling lives.
Dr. Osama Muneer Ahmed, MD graduated from Yale School of Medicine in 2021. He completed residency at University of Michigan Kellogg Eye Center. He has a state license in Maryland.
Medical School: Yale School of Medicine (2021)
Residency: University of Michigan Kellogg Eye Center
Licensed In: Maryland
Dr. Osama Muneer Ahmed, MD is associated with these hospitals and organizations:
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Dr. Osama Ahmed is a vitreoretinal diseases (retina and vitreous) specialist. In addition to English, Dr. Ahmed (or staff) speaks Urdu, Arabic, and French. Areas of expertise for Dr. Ahmed include vitreous hemorrhage, nystagmus, and thyroid problems. His professional affiliations include MedStar Washington Hospital Center and Luminis Health. After completing medical school at Yale School of Medicine, he performed his residency at the University of Michigan Kellogg Eye Center.