Medical Conditions Terminology in Category U


UCHL1 Antigens

High-molecular weight glycoproteins uniquely expressed on the surface of all leukocytes and their hemopoietic progenitors. The CD45 family consists of multiple members that are all products of a single gene. CD45 expression is necessary for signalling through the T-cell receptor.

Ulnar Artery

The larger of the two terminal branches of the brachial artery, beginning about one centimeter distal to the bend of the elbow. Like the RADIAL ARTERY, its branches may be divided into three groups corresponding to their locations in the forearm, wrist, and hand.

Umbilical Artery

Either of a pair of arteries originating from the internal iliac artery and passing through the umbilical cord to carry blood from the fetus to the placenta.


Unintelligible Articulation

Disorders of the quality of speech characterized by the substitution, omission, distortion, and addition of phonemes.

Unlabeled Antibody Enzyme Technique

Immunologic techniques based on the use of: (1) enzyme-antibody conjugates; (2) enzyme-antigen conjugates; (3) antienzyme antibody followed by its homologous enzyme; or (4) enzyme-antienzyme complexes. These are used histologically for visualizing or labeling tissue specimens.

Unstable Angina

Precordial pain at rest, which may precede a MYOCARDIAL INFARCTION.

Uracil Arabinofuranoside

A pyrimidine nucleoside formed in the body by the deamination of CYTARABINE.

Uracil Arabinoside

A pyrimidine nucleoside formed in the body by the deamination of CYTARABINE.

Urinary Antibody Coated Bacteria Test

Fluorescent antibody technique for visualizing antibody-bacteria complexes in urine. The presence or absence of antibody-coated bacteria in urine correlates with localization of urinary tract infection in the kidney or bladder, respectively.

Urinary Antiseptics

Substances capable of killing agents causing urinary tract infections or of preventing them from spreading.