Category: L

The use of a laser to disintegrate renal calculi. A fiberoptic device is inserted via the urethra, bladder, and ureter to the calculus. The laser is activated and the stone is destroyed without injuring adjacent tissues.  

A surgical treatment for nearsightedness, farsightedness, and other refractive errors of vision. In this procedure, a microtome is used to cut a thin flap on the surface of the cornea and a laser is used to resculpt the deeper tissue and correct refractive errors. Many patients have a marked improvement in their visual acuity as…

Drying due to air exposure of the cornea resulting from a defective closure of the eyelids.  

The point in a potentiometric reference electrode measurement system at which the reference solution makes contact with the test solution. An example is pH reference electrode.  

Inadequate blood flow to one or both legs due either to chronic arterial obstruction caused by atherosclerosis or to acute obstruction caused by embolism.  

Exposure of an organ recipient’s lymphocytes to ionizing radiation before organ transplantation, in an effort to decrease the likelihood of rejection of the donor graft.  

The species that may be found in humans. Their cysts may be mistaken for those of pathogenic amebae but have only one nucleus.  

A genus of amebae that colonizes the colons of humans and animals such as monkeys and pigs. They are not considered pathogenic.  

Any method, medicine, or device used to prolong life. Whether, when, and how to use life-sustaining treatments are difficult topics that require careful consideration by patients, their surrogates, and health care professionals. A radiological subspecialty that makes use of imaging technologies to assist and guide invasive procedures, (e.g., the collection of tissue specimens from internal…

Hyperalimentation with a fat containing solution administered intravenously.