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The most-watched medical videos on MedicalVideos.com — ranked by views from our community of medical students, healthcare professionals, and patients learning how the body works.
What Causes Ulcers? No single cause has been found for ulcers. However, it is now clear that an ulcer is the end result of an imbalance between digestive fluids in the stomach and duodenum. Most ulcers are caused by an infection with a type of bacteria called Helicobacter pylori (H. pylori). Factors that can increase your risk for ulcers include: Use of painkillers called nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin, naproxen (Aleve, Anaprox, Naprosyn, and others), ibuprofen (Motrin, Advil, some types of Midol, and others), and many others available by prescription; even safety-coated aspirin and aspirin in powered form can frequently cause ulcers. Excess acid production from gastrinomas, tumors of the acid producing cells of the stomach that increases acid output (seen in Zollinger-Ellison syndrome) Excessive drinking of alcohol Smoking or chewing tobacco Serious illness Radiation treatment to the area What Are the Symptoms of an Ulcer? An ulcer may or may not have symptoms. When symptoms occur, they may include: A gnawing or burning pain in the middle or upper stomach between meals or at night Bloating Heartburn Nausea or vomiting In severe cases, symptoms can include: Dark or black stool (due to bleeding) Vomiting blood (that can look like "coffee-grounds") Weight loss Severe pain in the mid to upper abdomen
The term chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) has been used to identify patients with a chronically progressive or relapsing symmetric sensorimotor disorder with cytoalbuminologic dissociation and interstitial and perivascular endoneurial infiltration by lymphocytes and macrophages. It can be considered the chronic equivalent of acute inflammatory demyelinating polyradiculoneuropathy, the most common form of Guillain-Barré syndrome. Signs and symptoms CIDP typically starts insidiously and evolves slowly, in either a slowly progressive or a relapsing manner, with partial or complete recovery between recurrences; periods of worsening and improvement usually last weeks or months. Most experts consider the necessary duration of symptoms to be greater than 8 weeks for the diagnosis of CIDP to be made. Symptoms reported include the following: Preceding infection (infrequent) Initial limb weakness, both proximal and distal Sensory symptoms (eg, tingling and numbness of hands and feet) Motor symptoms (usually predominant) In about 16% of patients, a relatively acute or subacute onset of symptoms In children, usually a more precipitous onset of symptoms Symptoms of autonomic system dysfunction (eg, orthostatic dizziness) Pertinent physical findings are limited to the nervous system, except when the condition is associated with other diseases. Such findings may include the following. Signs of cranial nerve (CN) involvement (eg, facial muscle paralysis or diplopia) Gait abnormalities Motor deficits (eg, symmetric weakness of both proximal and distal muscles in upper and lower extremities) Diminished or absent deep tendon reflexes Sensory deficits (typically in stocking-glove distribution) Impaired coordination See Clinical Presentation for more detail. Diagnosis Laboratory studies that may be helpful include the following: Cerebrospinal fluid analysis: Elevated protein levels are common (80% of patients); 10% of patients also have mild lymphocytic pleocytosis and increased gamma globulin Complete blood count (CBC), erythrocyte sedimentation rate (ESR), antinuclear antibody (ANA) level, biochemistry profile, and serum and urine immunoelectrophoresis (to exclude associated systemic disorders) In certain instances, genetic testing Other tests and procedures that may be warranted are as follows: MRI of the spine with gadolinium enhancement Electromyography (EMG) is a critical test to determine whether the disorder is truly a peripheral neuropathy and whether the neuropathy is demyelinating Peripheral (sural) nerve biopsy (see the image below): This is considered when the diagnosis is not completely clear, when other causes cannot be excluded, or when profound axonal involvement is observed on EMG; biopsy was once commonly recommended for most patients before immunosuppressive therapy, but current guidelines no longer recommend it
Field footage from Kenya shows jiggers, burrowing sand fleas, being removed from the skin. The recording comes from outreach work, and the audio is largely informal commentary from the scene. It documents a common community health problem in the region. The removals are shown as part of that field work in the community.
Male urinary catheter insertion is demonstrated step by step in this urology procedure video, from sterile preparation to advancing the catheter into the bladder. It is a core clinical skill taught to medical and nursing students. Procedure education only — not personal medical advice.
Do penises have bones? This educational video explains the anatomy behind the question — humans do not have a penile bone (baculum), unlike many other mammals, and erection is a blood-flow process instead. Educational only — not medical advice.
Less than a decade ago, corneal transplantation took a big leap forward with the introduction of Descemet’s stripping endothelial keratoplasty (DSEK), which removes only Descemet’s membrane and the diseased endothelium and replaces them with a thin, tripartite donor graft of posterior corneal stroma, Descemet’s membrane, and healthy endothelium. Then came DSAEK, in which the donor graft is prepared with an automated microkeratome, allowing for easier donor preparation and reproducible results by surgeons and eye bank technicians.1 DSAEK has proved to have many advantages over penetrating keratoplasty (PK) and its endothelial predecessors (see “A Brief History of Endothelial Keratoplasty”). Now DSAEK is being compared with a newer technique, Descemet’s membrane endothelial keratoplasty (DMEK), which has emerged as a promising alternative—grafting only Descemet’s membrane and endothelium, allowing for a pure anatomical replacement of only what was removed and the possibility of even better vision with quicker healing.1 Although indications for these procedures are similar, each has unique benefits and drawbacks. Five cornea surgeons offer their perspectives on the procedures and their thoughts on whether it may be time to move to the newer surgery.
This educational video discusses oral sex and health, including the infections that can be transmitted this way and how risk is reduced. It is presented in clinical terms for adult health education. Educational only — not medical advice.
A ureteroscopy is an examination or procedure using a ureteroscope. A ureteroscope, like a cystoscope, is an instrument for examining the inside of the urinary tract. The urologist can insert small instruments through the cystoscope to treat problems in the urethra and bladder or perform a biopsy. For a ureteroscopy, the urologist passes the ureteroscope through the bladder and into a ureter.
Choosing not to have sex provides 100 percent protection from HIV, STIs, and pregnancy. For some, this means avoiding vaginal, anal, and oral-genital intercourse altogether. Others may choose to avoid any type of sexual or intimate contact, including hugging and kissing. Choosing not to have sex is often referred to as “abstinence.” WHAT ARE THE ADVANTAGES OF CHOOSING NOT TO HAVE SEX (ABSTINENCE)? Choosing not to have sex is free and available to all. Not having sex is extremely effective at preventing both infection and pregnancy. It is the only 100% effective method of preventing sexually transmitted infections (STIs) and unintended pregnancy. Not having sex can be practiced at any time in one's life. Not having sex may encourage people to build relationships in other ways. Not having sex may be the course of action which you feel is right for you and makes you feel good about yourself.
In this narrated operation, a surgeon removes a large breast fibroadenoma under local anaesthesia. The narration explains the small incision at the edge of the areola, the blunt dissection used to free the lump, and how pressure helps deliver it through the opening. It is presented for education in breast surgery.
Idiopathic pulmonary fibrosis (IPF) is defined as a specific form of chronic, progressive fibrosing interstitial pneumonia of unknown cause, primarily occurring in older adults, limited to the lungs, and associated with the histopathologic and/or radiologic pattern of usual interstitial pneumonia (UIP).[1] Signs and symptoms The clinical symptoms of idiopathic pulmonary fibrosis are nonspecific and can be shared with many pulmonary and cardiac diseases. Most patients present with a gradual onset (often >6 mo) of exertional dyspnea and/or a nonproductive cough. Approximately 5% of patients have no presenting symptoms when idiopathic pulmonary fibrosis is serendipitously diagnosed.
Contraception beyond condoms is the topic of this educational video, which explains other pregnancy-prevention methods — including hormonal options, intrauterine devices, and fertility awareness — and how each method works. General information for learning, not personal guidance. Educational only — not medical advice; discuss choices with a clinician.
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Founded by Dr. Mohamed Ibrahim, MD, PhD — physician-scientist.
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