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Biomedical subjects

M Ronen

Publications and source records attributed to M Ronen.

24 records · Page 2Linked to original sources
PubMed1980

Total body retention and intestinal absorption of orally administered calcium-47 in chronic hemodialysis patients.

In order to evaluate the intestinal absorption of calcium in end-stage renal disease, whole-body 47Ca retention was determined using a whole-body counter in 18 patients undergoing chronic hemodialysis and in 12 normal volunteers. The results of the above study were compared with those obtained by measuring plasma radioactivity after oral load of 47Ca. A significantly lower whole-body retention of 47Ca was found in hemodialysis patients, as compared with normal subjects, and the results were similar to those of the direct calcium-absorption test. These findings suggest that whole-body 47Ca retention can be used as an index of intestinal calcium absorption in patients with chronic renal failure.

Administration, Oral↗
PubMed1978

Iron absorption in patients with polycythemia vera: a comparative study using the whole-body counter and the ferrous sulfate absorption test.

The absorption of iron given per os to ten polycythemic patients was examined by two methods: first by giving radioactive iron (59Fe) and utilizing a whole-body counter, and second by peroral administration of ferrous sulfate. A correlation of 80% was achieved by the two methods. A comparison was made between the patterns of the ferrous sulfate absorption in the polycythemic patients and in five patients with low iron serum due to bleeding hemorrhoids. No difference was observed between these two groups, with the exception of the initial values which were lower in the polycythemic patients. On the other hand, the absorption of iron was higher in polycythemic patients, indicating that serum iron level is not the only factor regulating iron absorption.

Absorption↗
PubMed1976

Identifying patients at risk for thromboembolism. Use of 125I-labeled fibrinogen in patients with acute myocardial infarction.

Fibrinogen labeled with iodine 125 was used to detect deep vein thrombosis (DVT) in 35 patients during their course and convalescence from acute myocardial infarction. Clinical status was assessed and scored with the use of a modified coronary prognostic index. According to the prognostic scores, patients were allocated to one of two groups. Of 27 patients in good clinical condition, DVT developed in only one patient, whereas thromboembolic complications occurred in seven of eight patients who were severely ill--a highly significant difference. Prophylactic anticoagulation is advisable in patients at risk.

Acute Disease↗
PubMedDate not supplied

Effect of cane use on tibial strain and strain rates.

The effect of cane ambulation on hip biomechanics has been well studied, but its effect on tibial strains and strain rates is not known. To test the hypothesis that cane use may lower tibial strain and strain rates during walking, percutaneous axial extensometers were mounted on the right medial cortex of the midtibial diaphysis in seven male volunteers. In vivo peak-to-peak axial tibial strains and strain rates were measured for ipsilateral and contralateral cane usage and compared with a no cane control. Cane-assisted ambulation was not found to significantly lower strain magnitudes; however, tibial strain rates were significantly lowered by both ipsilateral and contralateral cane usage. We conclude that either ipsilateral or contralateral cane usage may be beneficial when lowering tibial strain rate is desired, such as in the treatment of tibia stress fracture or osteoarthrosis of the knee.

Adult↗