[Behavior of renal filtration performance in the massive intraoperative administration of crystalloid solutions].

Renal function of 12 adult patients was studied pre- and postoperatively using tracer techniques in a black-box model. Chrom 51 EDTA was employed to determine extracellular fluid volume and glomerular filtration rate, Iodine 125-albumin to measure plasma volume. These patients who received during two 4-h periods pre- and postoperatively 3 ml/kg/h of a salt-sugar solution had a significantly increased extracellular fluid volume postoperatively.

Myocardial studies in haemodialysis patients.

Myocardial perfusion was studied using Thallium-201 (Tl-201) after dipyridamol in 33 patients on maintenance haemodialysis. It could be shown that coronary artery disease was underestimated by clinical symptoms, 55 per cent of patients had abnormal Tl-201 scintigrams, whereas typical or atypical chest pain was present in only 33 per cent of the patients. Eleven patients died within a year of the scintigraphic study, which resulted in an average mortality rate of 7.

[Reproducibility of repeated measurements using M-mode echocardiography, radionuclide ventriculoradiography and systolic time intervals].

The reproducibility of M-mode echocardiography, radionuclide ventriculography, and systolic time intervals (PEP/LVET) was studied in 16 patients with symmetrically contracting left ventricles and no signs of coronary heart disease. The values were determined four times in these 16 patients: twice each on day 1 and day 8 at an interval of 2-3 h. The mean EF and PEP/LVET values were nearly identical in all 4 repeat studies.

[Health disorders caused by radiation].

The rapid development and distribution of radiation sources has given rise to an "Energy Pollution" paralleling the chemical contamination of the environment. It has become necessary to establish limits for the "non-ionizing radiation" as well as for the ionizing radiation to which attention has been given for a long time. The non-ionizing radiation now includes the non-ionizing electromagnetic waves - radio frequency, micro waves, optical radiation - and ultrasound.