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PET Scan Animation

By: Administrator, Views: 9746

Positron Emission Tomography (PET) Computer-based nuclear imaging procedure that can produce three-dimensional pictures of actual organ functioning. Ultrasonography, Brain Use of high-frequency sound waves to record echoes on an oscilloscope and film.

Ultrasound of a Fetus (Sonogram)

By: Administrator, Views: 9562

An ultrasound exam is a procedure that uses high-frequency sound waves to scan a woman's abdomen and pelvic cavity, creating a picture (sonogram) of the baby and placenta. Although the terms ultrasound and sonogram are technically different, they are used interchangeably and reference the same exam.

Blood Pressure Measurement

By: Administrator, Views: 9598

How nurses check a patient's blood pressure. Blood Pressure The pressure exerted by the blood on the walls of the arteries. Higher (systolic) number: the pressure while the heart contracts. Lower (diastolic) number: the pressure when the heart relaxes between beats. Measured by a sphygmoma...

Arthroscopy

By: Administrator, Views: 9700

Arthroscopic surgery involves the surgery of a joint with the use of a flexible arthroscope and other surgical tools. In this example, the surgeon inserts the arthroscope to evaluate the damage to the knee joint and then uses instruments to perform the necessary procedure. Arthrography: Diagn...

How a Urinalysis is Performed

By: Administrator, Views: 9790

A urinalysis is a test of your urine. A urinalysis is used to detect and manage a wide range of disorders, such as urinary tract infections, kidney disease and diabetes. A urinalysis involves checking the appearance, concentration and content of urine. Abnormal urinalysis results may point to ...

Pasteur's Experiment

By: HWC, Views: 6001

Louis Pasteur designed a procedure to test whether sterile nutrient broth could spontaneously generate microbial life. To do this, he set up two experiments. In both, Pasteur added nutrient broth to flasks, bent the necks of the flasks into S shapes, and then boiled the broth to kill any existing...

Mendel's Principles of Dominance, Segregation and Independent Assortment

By: HWC, Views: 6153

Mendel selected true-breeding parents with contrasting traits, for example, purple and white flower color, and performed reciprocal crosses by choosing pollen from one parent and hand pollinating the seed-forming parent with this pollen. A cross-fertilization resulted from this procedure. In t...