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Biomedical subjects

J L Melamed

Publications and source records attributed to J L Melamed.

10 recordsLinked to original sources
PubMed1982

Frequency of anaphylactoid reactions during intravenous urography with radiographic contrast media at two different temperatures.

One hundred randomly selected patients undergoing routine excretory urography were assigned in double-blind fashion by alternate entry pairs to receive radiographic contrast media at 37 degrees C (Group I) or room temperature (Group II). There were three anaphylactoid reactions and five nonanaphylactoid reactions in Group I, and five anaphylactoid and eight nonanaphylactoid reactions in Group II, differences that were not statistically significant. No differences were detected between reactors and nonreactors. Thus, in this study, infusion temperature had no effect on the frequency of adverse reactions to radiographic contrast media during excretory urography.

Adolescent↗
PubMedDate not supplied

Helical CT angiography. A diagnostic problem solving technique.

We describe a technique for making computed tomography (CT) angiographic studies more practical and workable. True CT angiography can be performed with arterial contrast injection combined with helical CT technique. Detailed angiographic images can be obtained; reconstructed images are aided by the helical technique, and other special studies can also be performed.

Angiography↗
PubMedDate not supplied

Study of wrist motion in flexion and extension.

During flexion and extension of the wrist, the total range of motion is determined by the radiocarpal and the midcarpal joints. The angular contribution of each carpal row has been differently quantitated by previous investigators. A radiographic investigation of the wrist motion in flexion and extension was undertaken in 55 normal wrists to determine the contribution of the radio--carpal and mid carpal joints. The angular relationships of the radial and carpal components were also analyzed. In neutral position, the lunate and capitate are coaxial with the radius in a small percentage: lunate 11%, capitate 16%. In neutral position, the radio--lunate, lunate--capitate angles neutralize each other in a zig-zag manner in only 11%. During maximum flexion, the motion is 40% radio--carpal and 60% mid carpal. During maximum extension, the motion is 66.5% radiocarpal and 33.5% mid carpal. Functionally the scaphoid belongs to the 1st carpal row in flexion and to the second row in extension.

Adolescent↗