Screening for renal insufficiency following ESUR (European Society of Urogenital Radiology) guidelines with on-site creatinine measurements in an outpatient setting.

OBJECTIVE: To report the results and implications for workflow following introduction of ESUR guidelines to screen for potential renal insufficiency (RI) in private practice with on-site creatinine measurements. METHODS: A total of 1,766 consecutive outpatients scheduled for contrast-enhanced CT (CECT) completed the ESUR questionnaire enquiring about kidney disease, renal surgery, proteinuria, diabetes mellitus, hypertension, gout or use of nephrotoxic drugs. Patients with positive risk factors underwent on-site creatinine measurement and calculation of estimated glomerular filtration rate (eGFR). Attending radiologists adapted subsequent imaging depending on renal function and presence of risk factors. RESULTS: One or more ESUR risk factors were present in 796 (45.1%) patients, including hypertension (37.7%), nephrotoxic medication (21.3%), diabetes mellitus (8.0%), proteinuria (3.9%), renal disease (4.1%), gout (3.1%) and renal surgery (2.6%). Pre-procedural creatinine measurements revealed severe RI (eGFR < 30 ml min(-1) 1.73 m(-2)) in 10 (1.3%) and moderate RI (eGFR 30-59 ml min(-1) 1.73 m(-2)) in 106 (13.8%). Imaging work-up was adapted in 132 (16.6%) as follows: reduction of contrast material dose (n = 85), CT without contrast (n = 40), changeover to MRI (n = 3) or scintigraphy (n = 4). CONCLUSION: Screening for RI following ESUR guidelines requires creatinine measurements in nearly half of outpatients scheduled for CECT and reveals moderate to severe renal impairment in 6.6%.

Posterior reversible encephalopathy as the initial manifestation of a Guillain-Barré syndrome.

We report a female patient with posterior reversible encephalopathy syndrome as the initial manifestation of a Guillain-Barré syndrome. She presented with headache and paraesthesias of the fingertips three days after gastroenteritis. Examination revealed hypertension and tachypnoea. Brain MRI showed a bi-occipital vasogenic edema consistent with the syndrome. Subsequent examination showed a tetraparesis. Cerebrospinal fluid analyses revealed albuminocytologic dissociation and the diagnosis of Guillain-Barré syndrome was made. The typical radiological and clinical features of posterior reversible encephalopathy syndrome (headache and hypertension) were present prior to the clinical manifestation of Guillain-Barré syndrome. We suggest posterior reversible encephalopathy syndrome to be considered as an initial manifestation of Guillain-Barré syndrome.

Virosomes as carriers for combined vaccines.

Immunopotentiating reconstituted influenza virosomes (IRIV) are liposomes which carry the two glycoproteins of the influenza virus on their surface. A hepatitis A vaccine using IRIV as carrier has very good immunogenicity and is well tolerated. The objective of this study was to produce a fivefold combined vaccine against hepatitis A and B, diphtheria, tetanus and influenza A/B, and to show that in principle IRIVs can serve as carriers for multiple antigens which have good immunogenicity and are well tolerated. A total of four studies were carried out. Either the combined vaccine or the corresponding adequately tested alum-adsorbed single vaccines were tested for reactogenicity and immunogenicity in young adults. A hepatitis A and B combination on an IRIV base showed the same immunogenicity and toleration as the single vaccines. However, with the simultaneous coupling of all five vaccines on the same IRIV or the binding of Di-Te and HAV on different IRIVs there was a suppression of the humoral immune response against HAV (p = 0.03). The possibility that epitope-specific suppression had occurred could be ruled out. The suppression of the response against HAV could be circumvented by halving the quantity of Di-Te antigen in the combined vaccine so as to avoid antigenic competition. Surprisingly, the immunogenicity of Di-Te vaccination in the combination proved superior to that of a separate vaccination. All vaccinations were well tolerated.