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Biomedical subjects

E K Jensen

Publications and source records attributed to E K Jensen.

5 recordsLinked to original sources
PubMed1990

A new method for determination of the rate constant for clearance of radioactive indicators in gamma camera hepatography. Clinical examples with 99mTc-diethyl-IDA and 99mTc-diethyl-iodo-IDA.

Application of Stewart-Hamilton's formula to the activity-time curve recorded over a left ventricular region of interest following an intravenous bolus injection of a radioactive indicator in gamma camera hepatography has resulted in a new method for determination of the clearance rate constant of the indicator (i.e. the ratio of the clearance to the plasma volume). In a group of 19 normal subjects the clearance rate constant was 0.116 +/- 0.036 min-1 (means +/- 1 S.D.) with 99mTc-diethyl-IDA (SOLCO HIDA) and 0.184 +/- 0.037 min-1 (means +/- 1 S.D.) with 99mTc-diethyl-iodo-IDA (SOLCO IODIDA) in 15 normal subjects. The clearance rate constant is assumed to represent mainly hepatic clearance of the radioactive indicator and to a much smaller extent renal clearance. The literature shows diverging results as to the clearance of 99mTc-diethyl-IDA and the reasons for this are discussed. The correlations between the clearance rate constant of 99mTc-diethyl-IDA and a number of laboratory variables with relation to liver function were moderate to non-existent in a group of 16 subjects with abnormal values of at least one of these variables. The rate constant for clearance as described in the paper represents a non-invasive method for rapid evaluation of the uptake capacity of the liver and, in particular, with regard to the polygonal cells of the liver parenchyma when IDA derivatives are employed. The clinical usefulness of the clearance rate constant is probably superior to the group of routine laboratory variables which also describe other functions than liver uptake.

Adult↗
PubMed1990

The effect of captopril and metoprolol as monotherapy or combined with bendroflumethiazide on blood lipids.

In a 24-week randomized multicentre single-blind study, including mild to moderate hypertensives free from other diseases, the effect on blood lipids of captopril (n = 51) was studied and compared with that of metoprolol (n = 53). In order to keep the diastolic pressure less than 95 mm Hg, bendroflumethiazide was added to the medication for 11 patients in the captopril group and 11 patients in the metoprolol group. Neither captopril nor metoprolol altered total cholesterol significantly. Captopril as monotherapy increased HDL-cholesterol by 6.2% (P less than 0.01) and decreased triglycerides by 10.6% (P less than 0.05). Metoprolol as monotherapy decreased HDL-cholesterol by 5.6% (P less than 0.01) and increased triglycerides by 10.3% (P less than 0.05). When bendroflumethiazide was added the favourable effect of captopril on the blood lipids disappeared while the undesirable effect of metoprolol became more pronounced.

Adult↗
PubMed1990

Follow-up investigation of fresh lunate bone fracture.

In order to evaluate the clinical and radiological aspects of fresh lunate fractures, a follow-up investigation was carried out. In the past thirty-one years (1956-1986), seventeen patients were found to have fresh lunate fractures. Eleven of these cases were clinically and radiologically reexamined, with observation intervals ranging from 1.25 to 31.33 years. The authors found no radiologic evidence of lunatomalacia, osteonecrosis, or osteoarthrosis. Two cases of chip-fractures had not healed, but the bone structure was normal. Clinically, none of the patients presented with pain, muscular atrophy, or reduced power of grip. None of the patients had changed occupation as a result of the fracture.

Adolescent↗
PubMed1977

Kinetics of small lymphocytes in normal and nude mice after splenectomy.

Autoradiography and various quantitations on lymphoid tissues have been used to evaluate the kinetics of small lymphocytes in normal (+/nu or +/+) and congenitally athymic nude (nu/nu) NMRI mice 1 month after splenectomy or sham-splenectomy. The results indicate that splenectomy causes depressed thymic activity and diminished numbers of T lymphocytes in peripheral lymphoid tissues. The total number of cells in these tissues as well as the blast cell activity, were within normal limits. Bone marrow lymphocyte numbers and kinetics as well as blood lymphocyte levels in splenectomized and sham-splenectomized normal animals were comparable. Blood lymphocyte numbers were at normal levels in splenectomized nude mice, in spite of reduced numbers of bone marrow and thoracic duct lymphocytes. It is suggested that increased number of newly-formed lymphocytes, found in lymph nodes and blood of splenectomized mice, are released from the lympho-myeloid organs in compensation for the loss of long-lived, thymus-derived cells.

Animals↗