Top videos

Is laser eye surgery riskier than people think?
Is laser eye surgery riskier than people think? Mohamed Ibrahim 49 Views • 2 years ago

One man is speaking out about the potential risks of laser eye surgery, after he says the procedure left his vision permanently impaired.

Subhepatic appendicitis
Subhepatic appendicitis Scott 8,807 Views • 2 years ago

Intestinal malrotation is a developmental anomaly that occasionally causes an unusual array of symptoms in adults. The delay in diagnosis that is common in patients with malrotation frequently results in a ruptured appendix. Appendicitis should be considered when characteristic signs and symptoms are present, even if the location of abdominal pain is atypical.

How Breast Milk is Produced?
How Breast Milk is Produced? samer kareem 19,859 Views • 2 years ago

Prompted by the hormone prolactin, the alveoli take proteins, sugars, and fat from your blood supply and make breast milk. A network of cells surrounding the alveoli squeeze the glands and push the milk out into the ductules, which lead to a bigger duct.

What is Puberty?
What is Puberty? samer kareem 12,170 Views • 2 years ago

The heart like you've never seen it
The heart like you've never seen it Emery King 22,824 Views • 2 years ago

DMC Heart Imaging Specialist Doctor Hamid Sattar uses the 64-slice Coronary CTA to find coronary artery disease before symptoms even appear. ~ Detroit Medical Center

Post Tubal Ligation Syndrome (PTLS)
Post Tubal Ligation Syndrome (PTLS) CHTRC Webmaster 15,682 Views • 2 years ago

In this video Erin K, a tubal reversal patient, explains the symptoms she experienced while suffering from Post Tubal Ligation Syndrome (PTLS). After having tubal reversal surgery her symptoms were relieved. Although numerous women suffer from adverse symptoms after having a tubal ligation, many physicians do not believe PTLS exists. In an ongoing study of over 300 patients reporting Post Tubal Ligation symptoms more than 90% have found relief after tubal reversal at Chapel Hill Tubal Reversal Center.

What you should know: about LUPUS
What you should know: about LUPUS samer kareem 1,881 Views • 2 years ago

Only about a third of people with lupus get the tell-tale butterfly-shaped rash on their face. What you should know:

Pill Camera Swallowed
Pill Camera Swallowed samer kareem 12,793 Views • 2 years ago

There’s a strange, mysterious world inside us, an alien-looking environment that turns the food we eat into nutrients that keep us alive. Michael Mosley swallows a camera to take a closer look.

Best
Best "Stop Smoking" advertisement Magdy 6,626 Views • 2 years ago

Please watch and share with your firends and family who smoke

Acanthamoeba Keratitis
Acanthamoeba Keratitis samer kareem 8,143 Views • 2 years ago

Acanthamoeba keratitis is a rare disease in which amoebae invade the cornea of the eye. It may result in permanent visual impairment or blindness.

Review of heart sounds
Review of heart sounds Surgeon 45,870 Views • 2 years ago

Review of heart sounds

Idiopathic Thrombocytopenic Purpura
Idiopathic Thrombocytopenic Purpura samer kareem 5,570 Views • 2 years ago

Idiopathic thrombocytopenic purpura (ITP) is a disorder that can lead to easy or excessive bruising and bleeding. The bleeding results from unusually low levels of platelets — the cells that help blood clot. Idiopathic thrombocytopenic purpura, which is also called immune thrombocytopenia, affects children and adults. Children often develop ITP after a viral infection and usually recover fully without treatment. In adults, the disorder is often long term. If you don't have signs of bleeding and your platelet count isn't too low, you may not need any treatment. In rare cases, the number of platelets may be so low that dangerous internal bleeding occurs. Treatment options are available.

Lumber Puncture
Lumber Puncture samer kareem 16,403 Views • 2 years ago

A lumbar puncture (also called a spinal tap) is a procedure to collect and look at the fluid (cerebrospinal fluid, or CSF) surrounding the brain and spinal cord. During a lumbar puncture, a needle is carefully inserted into the spinal canal low in the back (lumbar area). Samples of CSF are collected.

HIV Virus Life Cycle and Drug Reaction
HIV Virus Life Cycle and Drug Reaction Magdy 11,447 Views • 2 years ago

Binding and Fusion: HIV begins its life cycle
when it binds to a CD4 receptor and one of two
co-receptors on the surface of a CD4+
Tlymphocyte. The virus then fuses with the host
cell. After fusion, the virus releases RNA, its
genetic material, into the host cell.

Reverse Transcription: An HIV enzyme
called reverse transcriptase converts the singlestranded HIV RNA to double-stranded HIV DNA.

Integration: The newly formed HIV DNA
enters the host cell's nucleus, where an HIV
enzyme called integrase "hides" the HIV DNA
within the host cell's own DNA. The integrated
HIV DNA is called provirus. The provirus may
remain inactive for several years, producing few or
no new copies of HIV

Transcription: When the host cell receives a
signal to become active, the provirus uses a host
enzyme called RNA polymerase to create copies of
the HIV genomic material, as well as shorter
strands of RNA called messenger RNA (mRNA).
The mRNA is used as a blueprint to make long
chains of HIV proteins.

Assembly: An HIV enzyme called protease cuts
the long chains of HIV proteins into smaller
individual proteins. As the smaller HIV proteins
come together with copies of HIV's RNA genetic
material, a new virus particle is assembled.

Budding: The newly assembled virus pushes out
("buds") from the host cell. During budding, the new
virus steals part of the cell's outer envelope. This
envelope, which acts as a covering, is studded with
protein/sugar combinations called HIV
glycoproteins. These HIV glycoproteins are
necessary for the virus to bind CD4 and coreceptors. The new copies of HIV can now move
on to infect other cells.

Colonoscopy Showing Moving Parasites
Colonoscopy Showing Moving Parasites Surgeon 10,028 Views • 2 years ago

Colonoscopy Showing Moving Parasites

Epidermal Cyst
Epidermal Cyst samer kareem 3,062 Views • 2 years ago

Epidermoid cysts, also called sebaceous, keratin, or epithelial cysts, are small, hard lumps that develop under the skin. These cysts are common. They grow slowly. They do not cause other symptoms and are nearly never cancerous. Epidermoid cysts are often found on the face, head, neck, back, or genitals

EKG Basics in one minute
EKG Basics in one minute Scott 2,160 Views • 2 years ago

Learn the basics of ECG (EKG) in one minute

Aortic Aneurysm 3D Animation
Aortic Aneurysm 3D Animation Mohamed 18,389 Views • 2 years ago

Most intact aortic aneurysms do not produce symptoms. As they enlarge, symptoms such as abdominal pain and back pain may develop. Compression of nerve roots may cause leg pain or numbness. Untreated, aneurysms tend to become progressively larger, although the rate of enlargement is unpredictable for any individual. Rarely, clotted blood which lines most aortic aneurysms can break off and result in an embolus. They may be found on physical examination. Medical imaging is necessary to confirm the diagnosis. Symptoms may include: anxiety or feeling of stress; nausea and vomiting; clammy skin; rapid heart rate. In patients presenting with aneurysm of the arch of the aorta, a common symptom is a hoarse voice as the left recurrent laryngeal nerve (a branch of the vagus nerve) is stretched. This is due to the recurrent laryngeal nerve winding around the arch of the aorta. If an aneurysm occurs in this location, the arch of the aorta will swell, hence stretching the left recurrent laryngeal nerve. The patient therefore has a hoarse voice as the recurrent laryngeal nerve allows function and sensation in the voicebox. Abdominal aortic aneurysms, hereafter referred to as AAAs, are the most common type of aortic aneurysm. One reason for this is that elastin, the principal load-bearing protein present in the wall of the aorta, is reduced in the abdominal aorta as compared to the thoracic aorta (nearer the heart). Another is that the abdominal aorta does not possess vasa vasorum, hindering repair. Most are true aneurysms that involve all three layers (tunica intima, tunica media and tunica adventitia), and are generally asymptomatic before rupture. The most common sign for the aortic aneuysm is the Erythema nodosum also known as leg lesions typically found near the ankle area. The prevalence of AAAs increases with age, with an average age of 65–70 at the time of diagnosis. AAAs have been attributed to atherosclerosis, though other factors are involved in their formation. An AAA may remain asymptomatic indefinitely. There is a large risk of rupture once the size has reached 5 cm, though some AAAs may swell to over 15 cm in diameter before rupturing. Before rupture, an AAA may present as a large, pulsatile mass above the umbilicus. A bruit may be heard from the turbulent flow in a severe atherosclerotic aneurysm or if thrombosis occurs. Unfortunately, however, rupture is usually the first hint of AAA. Once an aneurysm has ruptured, it presents with a classic pain-hypotension-mass triad. The pain is classically reported in the abdomen, back or flank. It is usually acute, severe and constant, and may radiate through the abdomen to the back. The diagnosis of an abdominal aortic aneurysm can be confirmed at the bedside by the use of ultrasound. Rupture could be indicated by the presence of free fluid in potential abdominal spaces, such as Morison's pouch, the splenorenal space (between the spleen and left kidney), subdiaphragmatic spaces (underneath the diaphragm) and peri-vesical spaces. A contrast-enhanced abdominal CT scan is needed for confirmation. Only 10–25% of patients survive rupture due to large pre- and post-operative mortality. Annual mortality from ruptured abdominal aneurysms in the United States alone is about 15,000. Another important complication of AAA is formation of a thrombus in the aneurysm.

Wireless brain implant
Wireless brain implant samer kareem 1,502 Views • 2 years ago

Watch as this wireless brain implant allows a paralyzed monkey to walk again

Technique for Popliteal/Peroneal Nerve Block
Technique for Popliteal/Peroneal Nerve Block M_Nabil 12,580 Views • 2 years ago

Technique for Popliteal/Peroneal Nerve Block

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