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Biomedical subjects

J Roos

Publications and source records attributed to J Roos.

At least 73 records · Page 4Linked to original sources
PubMed1987

Cold provocation test results from a 1985 survey of hard-rock miners in Ontario.

A total of 143 miners, 6 ex-miners, and 42 referents from five mines in northern Ontario were examined with a cold provocation test. The skin temperatures, measured by thermocouples at the tips of the fingers and thumbs were recorded at 5-s intervals throughout the immersion in cold water (10 degrees C) for 10 min and during the recovery period. The finger skin temperature was followed until 99% recovery had occurred as compared to the starting temperature. For the referents and the vibration-exposed subjects, the results by separate stage of the Taylor-Pelmear scale for hand-arm vibration syndrome were compared. There were statistically significant differences in the mean finger temperature at the 50, 75, 90, and 95% recovery times between stages 0, 0T/0N, and stages 1 through 3 combined, as well as significant differences between stages 1, 2, and 3. The mean temperature at 10 min and the mean hyperemia temperature for eight fingers combined were compared between the miners and referents. There were significant differences in the mean temperature at 10 min and in the hyperemia temperature between the referents and miners in stage 0T/0N, as well as between the referents and the miners in stages 1 through 3 combined. For the worst finger (defined as that with the lowest temperature at 10 min) there was an increasing trend towards a lower hyperemia temperature and delay in recovery time from stage 0 to stages 2 and 3 combined.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1986

Accessory olfactory bulb lesions and lordosis behavior in the male rat feminized with ovarian hormones.

Orchidectomized rats were given estrogen and progesterone and tested for feminine behavior in the presence of a mounting male after accessory olfactory bulb removal (AOBR). Complete AOBR caused a rise in the number of estrogen-progesterone-treated male rats responding by lordosis behavior to male mounts as compared to controls and sham-operated animals. By contrast, LQ scores did not appear to differ in these three groups of animals. The results are discussed in terms of involvement of the main and the accessory olfactory systems in the regulation of feminine behavior in the male rat.

Animals↗
PubMed1986

[Subcapsular hematoma of the liver in an eclamptic crisis].

A patient is described who showed signs of eclampsia in the 31st week of first pregnancy. The cause of shock proved to be a subcapsular hematoma in the liver and it was accompanied by a hematothorax. The diagnosis was made by CT-scanning. The pathogenesis is discussed.

Adult↗
PubMed1982

Postoperative hemostatic profile in relation to gram-negative septicemia.

Gram-negative septicemia presents a particular problem in the ICU. Septicemia is usually diagnosed by fever, chills, and shock. Results of blood cultures become available a few days later. Major surgery induced a marked decline in antithrombin III (AT III) and plasminogen (PLG) to a mean level of 0.60 U/ml (normal value: 0.80-1.40 U/ml) on the 2nd and 3rd postoperative days. Around the 5th postop day, these values again attained mean preoperative levels. Seventy-six surgical ICU patients were investigated preoperatively and for 10 days postoperatively to relate postop septicemia to changes in the hemostatic profile. In 15 patients with gram-negative septicemia verified by positive culture, AT III and PLG barely recovered from the postop decrease and remained significantly lower (p less than 0.05) after the 3rd postop day, compared to 61 surgical ICU patients without septicemia. The behavior of alpha 2antiplasmin (alpha 2AP) values was equal in both groups. This difference in hemostatic profile preceded the clinical manifestations of septicemia and the results of blood culture by several days. Leucocyte or platelet counts provided no reliable information on the early development of septicemia in these surgical patients. It is concluded that persistent low plasma AT III and PLG levels in the postop phase are early indicators of a developing gram-negative septicemia.

Adolescent↗
PubMed1982

Consequences of the chronic cutaneous application of iodinated antiseptics on the thyroid function in the guinea-pig.

The effect of the chronic cutaneous application of iodine-containing substances on the thyroid function was studied in the guinea-pig. Six iodinated products were daily applied at the rate of 2 g/kg/day for 90 days. We find a quasi-abolition in the thyroid 131I-uptake (reflecting the transcutaneous absorption of free iodine) and an important transient thyroidal hyperproduction during the first month. Then, this primary hyperthyroidism induces a strong pituitary negative feed-back so that the levels of the circulating hormones T3 and T4 are normalized at the end of the experiment; a new hormonal balance is reached with a TSH level reduced by half compared to its normal value.

Animals↗