Search PubMed⌕ Search

Biomedical subjects

G Raymond

Publications and source records attributed to G Raymond.

At least 163 records · Page 9Linked to original sources
PubMedDate not supplied

Polymeric gadolinium chelate magnetic resonance imaging contrast agents: design, synthesis, and properties.

We have synthesized and evaluated five series of polymeric gadolinium chelates which are of interest as potential MRI blood pool contrast agents. The polymers were designed so that important physical properties including molecular weight, relaxivity, metal content, viscosity, and chelate stability could be varied. We have shown that, by selecting polymers of the appropriate MW, extended blood pool retention can be achieved. In addition, relaxivity can be manipulated by changing the polymer rigidity, metal content affected by monomer selection, viscosity by polymer shape, and chelate stability by chelator selection.

Animals↗
PubMedDate not supplied

[Endoscopic internal urethrotomy. Retrospective studies of 132 cases].

The authors report a series of 132 patients with urethral stricture all treated by the same surgical technique between 1979 and 1984: direct vision internal urethrotomy. 62% of good results were obtained after a single operation with a follow-up ranging between 18 months and 5 years. There was no mortality and the morbidity was considered to be 5%. The authors indicate that the results were more favourable when the operation was performed in a solitary, short (less than 2 cm) non-infected stricture of the proximal urethra. The duration of postoperative catheterization was 10 days; catheterization for a longer period did not provide any significant advantage. The poor results (38%) were reported in cases of extensive strictures situated in the distal urethra or in patients with a history of urethral surgery. These cases were treated by repeated internal urethrotomy; 32% were cured after a second urethrotomy, while the others required maintenance sessions of urethral dilatation or even a urethroplasty procedure.

Adolescent↗