Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «P»:
PEEP: Abbreviation for positive end-expiratory pressure. A method of ventilation in which airway pressure is maintained above atmospheric pressure at the end of exhalation by means of a mechanical impedance, usually a valve, within the circuit. The purpose of PEEP is to increase the volume of gas ...
Peeping tom (Voyeurism): Peeping tom (voyeurism) is a disorder that involves
achieving sexual arousal by observing an unsuspecting and non-consenting person
who is undressing or unclothed, and/or engaged in sexual activity. This behavior
may conclude with masturbation by the voyeur. The voyeur do...
Peer review: Scrutiny by one's peers (equals).
Peer-reviewed articles appearing in medical journals have been scrutinized by members of
the biomedical community before publication....
PEF: Peak expiratory flow....
PEG: Stands for percutaneous
endoscopic gastrostomy, a surgical procedure for placing a
feeding tube without having to perform an open laparotomy
(operation on the abdomen). The aim of PEG is to feed those
who cannot swallow. PEG may be done by a surgeon,
otolaryngologist (ENT specialist) or g...
PEJ: Percutaneous endoscopic jejunostomy....
PELD: Pediatric End-Stage Liver Disease. A disease severity scoring system for children under 18 years of age, designed to improve the organ allocation in transplantation based on the severity of liver disease rather than time on the waiting list. The PELD score is based on both laboratory data and...
Peliosis hepatis: A rare condition in which the liver contains multiple, randomly-distributed blood-filled spaces or cavities ranging in size from millimeters to several centimeters in diameter. Peliosis hepatis has been associated with the use of
anabolic steroids and other hormones such as
Pelizaeus-Merzbacher disease: A disorder of the central nervous system (CNS) in which there is loss of myelin, the sheath around the nerves. The disease is clinically characterized by nystagmus (rhythmical oscillation of the eyes), impaired motor development, tremor, progressive spasticity (increase...
Pelizaeus-Merzbacher-like disease: A disease that is virtually identical to Pelizaeus-Merzbacher disease (PMD) but without a mutation in the PLP1 gene that causes PMD. Both PMD and Pelizaeus-Merzbacher-like disease (PMLD) are characterized by rapid, involuntary movements of the eye (nystagmus), impa...
Pellagra: A disease due to deficiency of niacin, a B-complex vitamin. Pellagra is the "disease of the four D's" --
Dermatitis: A scaly rash on skin exposed to light or trauma;
Dementia: Mental disorientation, delusions and
Other features are ulcerations within ...
Pelvic: Having to do with the pelvis, the lower part of the
abdomen, located between the hip bones....
Pelvic congestion syndrome
Pelvic congestion syndrome: A condition in which there is congestion of blood in dilated veins of the pelvis. The ovarian vein and internal iliac veins are commonly affected, and the congestion may lead to chronic pelvic pain in women. The pain is usually dull, varies in severity, and is not related...
Pelvic exam: An examination of the organs of the female reproductive system.
In a pelvic exam, a speculum (an instrument for opening and widening certain passages of the body) is used to open the vagina and aid in visualizing the uterine cervix. A sample of cells may be taken off the surface of the ...
Pelvic inflammatory disease (PID)
Pelvic inflammatory disease (PID): Ascending infection of the female upper genital tract (the female structures above the cervix). PID is the most common and serious complication of sexually transmitted diseases (STDs), aside from AIDS, among women.
The signs and symptoms of PID include fever, fou...