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Biomedical subjects

B G Jensen

Publications and source records attributed to B G Jensen.

7 recordsLinked to original sources
PubMed1990

Different short-term effect of protein and carbohydrate intake on TSH, growth hormone (GH), insulin, C-peptide, and glucagon in humans.

The effect of isocaloric (500 kcal) protein and carbohydrate ingestion was studied in a crossover study in nine healthy humans. Subjects were studied twice after overnight fasting, with an interval of 3 to 7 days. Blood was collected for 240 min after food ingestion. The initial reaction of growth hormone (GH) and thyroid stimulating hormone (TSH) to protein and carbohydrate was identical, with a reduction in both GH and TSH, and nadir occurring after 45-60 min and 120 min, respectively. During the next 120 min TSH returned to starting level after carbohydrate intake but was still reduced after protein intake (p less than 0.04). After both diets GH increased after the initial decline, the increase was greatest after protein intake and maximum was reached at 180 min (p less than 0.02). It has been reported that the 5'-deiodination of T4 is stimulated by insulin and inhibited by glucagon. The physiological increase in insulin after carbohydrate ingestion (p less than 0.05), and the physiological increase in glucagon after protein ingestion (p less than 0.05) was not associated with any changes in TT4, FT4, TT3, FT3, or rT3 that could indicate changes in the 5'-deiodinase activity.

Adult↗
PubMed1989

[Eye injuries in Denmark. Based on a prospective study in a limited geographic area].

A regional prospective casualty department investigation of patients with eye injuries is compared with recent Danish investigations on the subject. The frequency, causes and the primary sites of treatment are reviewed and the pattern of referral is followed. The investigation reveals that great regional differences exist as regards the frequency and the sites of primary treatment and that injuries sustained during leisure activities resemble occupational injuries. The combination of standardized casualty department treatment and the possibility of referral to a specialist or special department appears to be a good therapeutic model for acute eye injuries.

Adolescent↗
PubMed1989

[Multiple cartilaginous exostoses].

Multiple cartilaginous exostosis (MKE) is an autosomally dominant hereditary disease with great individual expression. The disease becomes apparent most frequently at the age of 2-5 years and approximately 80% of the cases have been diagnosed before the age of ten years. The exostoses continue to grow until shortly after puberty. The exostoses may give rise to severe deformation of the skeleton particularly around the knee, ankle and wrist joints. Reduction of joint mobility is frequently observed either on account of the size of the exostoses and their localization or on account of the joint deformity. Treatment of MKE is surgical and corrective surgery with removal of symptom-producing exostoses is the commonest intervention. Osteotomies or introduction of joint-prostheses may prove necessary in cases with the severest joint deformities. The exostoses may undergo malignant transformation, most frequently to chondrosarcomata which grow relatively slowly and metastasize late. Treatment of these must be undertaken in a tumour centre where limb-saving tumour surgery is available in cooperation between the orthopaedic surgeon and the oncologist. Families with MKE should be given patho-genetic advice.

Adult↗
PubMed1985

Bronchogenic carcinoma: staging with MR compared with staging with CT and surgery.

Thirty-three patients suspected of having bronchogenic carcinoma were studied prospectively using magnetic resonance (MR). In this group, 30 underwent examination with computed tomography (CT), 15 underwent thoracotomy, six had mediastinal biopsy procedures performed, and eight underwent bronchoscopy. MR studies, which included transaxial spin-echo imaging (TR, 0.5 and 2.0 sec; TE, 28 and 56 msec) of all patients and sagittal or coronal imaging of 18, were performed without knowledge of CT findings, using only plain radiographs as a guide. CT and MR studies were interpreted separately. CT and MR provided comparable information regarding the presence and size of mediastinal lymph nodes. MR better discriminated mediastinal nodes from vascular structures. However, in two of 11 patients who had multiple mediastinal lymph nodes that were normal in size at CT examination and surgery, MR suggested a confluent abnormal mass, probably because of its poorer spatial resolution. MR was superior to CT in showing enlarged hilar lymph nodes, but CT was better for demonstrating bronchial abnormalities. In three of four patients who had a proved hilar mass with distal obstructive pneumonia, MR (TR, 2.0 sec) helped distinguish between the mass and collapsed lung.

Adult↗
PubMed1984

Coronal magnetic resonance imaging of the chest: normal and abnormal.

In order to determine the value of coronal magnetic resonance (MR) in diagnosing thoracic abnormalities, the multisection coronal spin echo MR images were reviewed of 10 normal subjects and 20 patients with thoracic abnormalities. In the abnormal patients, coronal images were compared with transaxial MR images obtained with TR values of 0.5 and 2.0 sec. In general, coronal imaging was of value in several situations. It allowed structures oriented in the coronal plane to be imaged along their longitudinal axes, provided an additional perspective and increased the confidence of diagnosis, and helped clarify anatomic relationships difficult or impossible to resolve on transaxial images because of volume averaging. Specifically, coronal images were sometimes superior to transaxial images in evaluating the aorticopulmonary window and masses at the lung apex or base. Transaxial images were often superior in evaluating the pretracheal space, subcarinal space, and hili. Within the pulmonary hili, lateral hilar masses were better defined on coronal images than were anterior or posterior hilar masses. Coronal images obtained with a TR of 1.0 sec (10 sections) allow evaluation of most node-bearing mediastinal compartments and provide adequate mass/fat contrast.

Adult↗
PubMedDate not supplied

Sagittal MR imaging of the chest: normal and abnormal.

To determine the value of sagittal magnetic resonance (MR) in diagnosing thoracic abnormality, we reviewed the multisection sagittal spin-echo MR images of 13 normal subjects and 23 patients with a variety of thoracic abnormalities. In the abnormal subjects sagittal images were compared with transaxial MR performed with repetition time values of both 0.5 and 2.0 s. Sagittal images were most helpful in the evaluation of structures lying in the sagittal plane such as the thoracic aorta. Mediastinal masses in most locations were better seen and evaluated in the transaxial plane. However, the relationship of subcarinal masses to the trachea, left atrium, and pulmonary artery was better appreciated in the sagittal plane. The relationship of hilar masses to hilar vessels, bronchi, and the mediastinum was usually better seen on transaxial images. Also, the relationship of paramediastinal masses to the mediastinum was difficult to evaluate with sagittal scans.

Adolescent↗