Top videos
Pregnancy occurs when an egg is fertilized by a sperm, grows inside a woman's uterus (womb), and develops into a baby. In humans, this process takes about 264 days from the date of fertilization of the egg, but the obstetrician will date the pregnancy from the first day of the last menstrual period (280 days 40 weeks).
Vertigo is a sense of rotation, rocking, or the world spinning, experienced even when someone is perfectly still. Many children attempt to create a sense of vertigo by spinning around for a time; this type of induced vertigo lasts for a few moments and then disappears. In comparison, when vertigo occurs spontaneously or as a result of an injury it tends to last for many hours or even days before resolving.
A coma is a prolonged state of unconsciousness. During a coma, a person is unresponsive to his or her environment. The person is alive and looks like he or she is sleeping. However, unlike in a deep sleep, the person cannot be awakened by any stimulation, including pain.
The Glasgow Coma Scale (GCS) is the most common scoring system used to describe the level of consciousness in a person following a traumatic brain injury. Basically, it is used to help gauge the severity of an acute brain injury.
Hemorrhoids (HEM-uh-roids), also called piles, are swollen veins in your anus and lower rectum, similar to varicose veins. Hemorrhoids have a number of causes, although often the cause is unknown. They may result from straining during bowel movements or from the increased pressure on these veins during pregnancy.
A colonoscope is the special tool used to perform a colonoscopy. It is a thin, flexible, tubular ‘telescope’ with a light and video camera that your doctor carefully guides through your colon in order to see and determine the health of your colon. Watch this animation to learn about the features of the colonoscope, how the colonoscopy procedure is performed and how polyps are removed, and the follow-up care you and your doctor should talk about after your procedure.
In vitro fertilization, or IVF, is the most common and effective type of assisted reproductive technology to help women become pregnant. It involves fertilizing an egg outside the body, in a laboratory dish, and then implanting it in a woman's uterus. By 2016, some 6.5 million babies had been born using in-vitro fertilization (IVF). According to the Centers for Disease Control and Prevention (CDC), around 1.6 percent of babies born in the United States each year are conceived through assisted reproductive technology (ART).
An ectopic pregnancy (EP) is a condition in which a fertilized egg settles and grows in any location other than the inner lining of the uterus. The vast majority of ectopic pregnancies are so-called tubal pregnancies and occur in the Fallopian tube.
rostbite refers to the freezing of body tissue (usually skin) that results when the blood vessels contract, reducing blood flow and oxygen to the affected body parts. Normal sensation is lost, and color changes also occur in these tissues.
What are the classifications of burns? Burns are classified as first-, second-, or third-degree, depending on how deep and severe they penetrate the skin's surface. First-degree (superficial) burns. First-degree burns affect only the epidermis, or outer layer of skin. The burn site is red, painful, dry, and with no blisters. Mild sunburn is an example. Long-term tissue damage is rare and usually consists of an increase or decrease in the skin color. Second-degree (partial thickness) burns. Second-degree burns involve the epidermis and part of the dermis layer of skin. The burn site appears red, blistered, and may be swollen and painful. Third-degree (full thickness) burns. Third-degree burns destroy the epidermis and dermis and may go into the subcutaneous tissue. The burn site may appear white or charred Fourth degree burns. Fourth degree burns also damage the underlying bones, muscles, and tendons. There is no sensation in the area since the nerve endings are destroyed.
The oral contraceptive pill, commonly known as "the pill," is a hormone-based method of preventing pregnancy. It can also help resolve irregular menstruation, painful or heavy periods, endometriosis, acne, and premenstrual syndrome (PMS). Birth control pills work by preventing ovulation. No egg is produced, so there is nothing for the sperm to fertilize. Pregnancy cannot occur. "The pill" is used by nearly 16 percent of women aged 15 to 44 years in the United States, and it has both advantages and disadvantages. People with different risk factors may be advised to use a particular kind of pill. There are different types of contraceptive pills. They all contain synthetic forms of the hormones estrogen, progesterone, or both. Synthetic progesterone is called progestin. Combination pills contain progestin and estrogen. The "mini pill," contains only progestin. Monophasic pills all contain the same balance of hormones. With phasic pills, two or three different types of pill are taken each month, each with a different balance of hormones.
kin grafting is a type of graft surgery involving the transplantation of skin. The transplanted tissue is called a skin graft. Skin grafting is often used to treat: Extensive wounding or trauma Burns Areas of extensive skin loss due to infection such as necrotizing fasciitis or purpura fulminans[2] Specific surgeries that may require skin grafts for healing to occur - most commonly removal of skin cancers Skin grafts are often employed after serious injuries when some of the body's skin is damaged. Surgical removal (excision or debridement) of the damaged skin is followed by skin grafting. The grafting serves two purposes: reduce the course of treatment needed (and time in the hospital), and improve the function and appearance of the area of the body which receives the skin graft.
What Is It? Your wisdom teeth (third molars) usually start to erupt (enter your mouth) during the late teen years. Sometimes, there's not enough room for them. They may come into your mouth partially or not at all. Partial eruption of a wisdom tooth can create a flap of gum tissue next to the tooth. The flap can trap bits of food and debris. It can turn into a hotbed for bacteria. It's called pericoronitis if the tissue around the tooth becomes inflamed. Pericoronitis also can occur around a wisdom tooth that is still completely under the gums. Symptoms Symptoms include: Painful, swollen gum tissue in the area of the affected tooth. It can be difficult to bite down comfortably without catching the swollen tissue between your teeth. A bad smell or taste in the mouth Discharge of pus from the gum near the tooth More serious symptoms include: Swollen lymph nodes under your chin (the submandibular nodes) Muscle spasms in the jaw Swelling on the affected side of the face Diagnosis Usually, someone with pericoronitis goes to the dentist, complaining of pain in the area of the back tooth. Pericoronitis is diagnosed during the clinical exam. Your dentist will see inflamed gum tissue in the area of the unerupted or partly erupted wisdom tooth. The gums may be red, swollen or draining fluid or pus. Expected Duration Pericoronitis can be managed with antibiotics and warm salt water rinses. It goes away in about one week. However, it can return. This is likely to happen if the tooth does not completely enter the mouth and food and bacteria keep building up under the gum. Prevention You can help to prevent pericoronitis by brushing any erupting wisdom tooth and flossing around it. This will help make sure that food and bacteria do not build up under the gums. However, sometimes these steps do not work. If pericoronitis returns, you may need to have the flap of gum tissue removed. In some cases, the flap of tissue grows back and the wisdom tooth will need to be extracted. Treatment Pericoronitis can be tricky to treat. That's because the flap of gum tissue won't go away until the wisdom tooth emerges naturally, the tissue is removed or the tooth is removed. Your dentist will clean the area thoroughly by rinsing under the flap with water to remove bits of food and pus. Your dentist also may need to remove damaged tissue. If the area is infected, you'll most likely be given antibiotics. Your dentist will explain how to keep the area clean, which is the best way to prevent the problem from returning. This usually involves brushing and flossing daily and rinsing your mouth with water several times a day. These steps will help to prevent food from getting stuck under the gum flap. In some cases, your dentist may suggest removing the erupting tooth. Or the dentist may want to remove the tooth above it, which bites down on the gum below. If your dentist thinks the tooth may erupt fully into the mouth without problems, he or she may leave it alone. However, if pericoronitis comes back, the tooth may be extracted. Pericoronitis that causes symptoms should be treated as soon as possible. If it is not, the infection can spread to other areas of your mouth. The most severe cases are treated in a hospital. They sometimes require intravenous antibiotics and surgery. When To Call a Professional If you have symptoms of pericoronitis, make an appointment to see your dentist. If your wisdom teeth are coming in, visit your dentist at least twice a year for regular checkups. During those visits, the dentist can check on the progress of your wisdom teeth. Prognosis Pericoronitis does not cause any long-term effects. If the affected tooth is removed or erupts fully into the mouth, the condition cannot return.
What Is a Paronychia (Nail Infection)? An infection that develops along the edge of the fingernail or toenail is called a paronychia (pear-ah-NIK-ee-ah). It is the most common hand infection and, if left untreated, can progress to a more severe infection of the entire finger or toe. Paronychia is distinguished from other infections such as onychomycosis and herpetic whitlow by its location and appearance.