Peripherally inserted central catheter PICC line

A catheter inserted into an arm vein and used for periods of up to three months. This catheter does not need to be surgically implanted and can be inserted at home by a trained nurse.

peritoneal cavity A space between layers of the parietal and visceral peritoneum, containing a small amount of fluid. The fluid minimizes friction as the viscera move against each other or the wall of the abdominal cavity.

peritoneal dialysis Dialysis (passing solute through a membrane) in which the lining of the peritoneal cavity is used as the dialysis membrane. Dialyzing fluid introduced into the peritoneal cavity is allowed to remain there for one or two hours and is then removed. The procedure may be repeated as often as indicated. The use of strictly sterile instruments helps prevent the development of peritonitis. Three related types of dialysis are intermittent peritoneal dialysis (performed using automated equipment), continuous cyclic peritoneal (treatments are performed every night with fluid remaining in the cavity until the next night), and continuous ambulatory peritoneal dialysis (a type of maintenance dialysis that uses an implanted peritoneal catheter).

peritoneum The thin, strong lining of the abdomen. The serous membrane reflected over the viscera and lining the abdominal cavity.

peritonitis Inflammation of the peritoneum, the membrane lining the abdominal cavity and investing the viscera.

perleche A disorder marked by fissures and epithelial desquamation (shedding of the epidermis) of corners of the mouth, usually seen in children. It may be due to oral candidiasis or may be a symptom of dietary deficiency, especially of riboflavin.

perphenazine Used to treat acute and chronic psychotic disorders; may be used as a tranquilizer to help agitated and disruptive behavior in the absence of true psychosis; sometimes used to treat severe nausea and vomiting. By inhibiting dopamine, perphenazine acts to correct an imbalance of nerve impulse transmissions thought to be responsible for mental disorders. Perphenazine belongs to a class of psychoactive drugs called phe-nothiazines, which have potent effects on the central nervous system and other organs. They can reduce blood pressure, stop seizures, control nausea and vomiting, and control the symptoms of psychosis. Perphenazine is available as tablets, oral concentrate, and solution for injection. It is also available in a number of combination products with the tricyclic antidepressant amitriptyline.

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