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Biomedical subjects

W Mortensson

Publications and source records attributed to W Mortensson.

At least 73 records · Page 4Linked to original sources
PubMed1976

Intracranial calcification mimicking the Sturge-Weber syndrome: a consequence of cerebral folic acid deficiency?

Cerebral cortical calcification identical to that of the Sturge-Weber syndrome was observed in two children. In one child the calcification appeared after intrathecal administration of methotrexate and skull irradiation because of leukemia involving the central nervous system. In the other child, who had coeliac disease and epilepsy, the calcification appeared after treatment with anticonvulsants. This treatment was also contributing to the development of profound megaloblastic anemia. The unspecificity of the Sturge-Weber calcification is stressed and the hypothesis is put forward that the calcification may be secondary to folic acid deficiency interfering with the matabolism in the central nervous system.

Angiomatosis↗
PubMed1976

Radiologic aspects of BCG-osteomyelitis in infants and children.

An account is given of results of the radiologic examination of 29 infants and children with bone tuberculosis caused by the Bacilli Calmette-Guérin (BCG) as a complication to intradermal vaccination. The diagnosis is based on radiologic appearances, microscopy and bacteriologic examination of specimens obtained from the bone lesions. The radiologic appearance of the bone lesions is in most cases characteristic and differs decisively from that of pyogenic osteomyelitis and malignant disease.

BCG Vaccine↗
PubMed1976

Angiography of the femoral artery following percutaneous catheterization in infants and children.

Iliac and femoral arteries previously exposed to percutaneous catheterization were examined by angiography in conjunction with re-catheterization in 44 infants and children, most of them with heart disease. Frequency and extension of thrombotic changes were analysed, as well as the relationship between occurrence of thrombotic complications and age, haematocrit value, catheterization time, and tendency to arterial spasm. Only age and arterial spasm were significant for the occurrence of thrombotic complications. Injury of the intima was considered to be the primary cause of these complications.

Adolescent↗
PubMed1976

Heart volume and haematocrit value following aorto-pulmonary anastomosis in children with Fallot's anomaly.

In 16 children with Fallot's anomaly and Waterston anastomosis, the effect of the shunt was examined repeatedly up to 2 years after operation. Change in heart volume was correlated with the haematocrit value. In 14 of the cases the function of the anastomosis was also evaluated on cardioangiography. Serial heart volume measurements were found useful to evaluate the function of the anastomosis.

Aorta↗
PubMed1976

Irradiation to the thyroid gland at cardiac catheterization and angiocardiography in children.

Irradiation to the thyroid gland was measured during cardiac catheterization in 16 infants and 30 children aged 1 to 13 years. The doses from fluoroscopy, full-scale angiocardiography, and cineradiography were measured separately with thermoluminescent dosimeters and, in addition, the exposure-area product was assessed during fluoroscopy with a transparent ionization chamber. Median value of the absorbed dose to the thyroid from the complete heart investigation was 370 mrad in infants and 260 mrad in children. The highest values and also the greatest range in dosage were observed in infants. The quotient of the thyroid-absorbed dose divided by the integral dose or the dose per exposed film area was also highest in infants, due to anatomical conditions. The absorbed dose to the thyroid during heart catheterization comes almost exclusively from scattered radiation. By appropriate examination technique this dose can be kept within acceptable limits.

Adolescent↗
PubMed1975

Percutaneous catheterization of the femoral vessels in children. II. Thrombotic occlusion of the catheterized artery: frequency and causes.

The frequency of, and the conditions which contribute to a reduction of the arterial peak flow to the calves after percutaneous catheterization of the femoral artery were studied by strain gauge plethysmography in 98 catheterizations of children aged 2-16 years. Marked, rapidly disappearing flow reduction, considered to be caused by intense spasm in the femoral artery, occurred in about 5 per cent of cases. Flow reduction under these conditions was generally less marked than at thrombotic occlusion. Thrombotic occlusion of the femoral artery appeared in about 5 per cent of cases, mainly in the younger children and principally in those exposed to catheterizations involving increased risk of intimal trauma. This led to the conclusion that intimal damage is the primary cause of thrombotic occlusion of the femoral artery after catheterization. However, an increased haematocrit value may possibly also promote thrombosis. The arterial blood flow at rest was not abnormally decreased in cases with thrombotic occlusion of the femoral artery. The length of the stay of the catheter in the artery does not seem to be of importance for thrombotic complications. The results indicate that the best way to avoid thrombotic occlusion of the artery at catheterization is to take measures to reduce intimal damage.

Adolescent↗
PubMed1975

Percutaneous catheterization of the femoral vessels in children. I. Influence on arterial peak flow and venous emptying rate in the calves.

The influence of percutaneous catheterization of the femoral vessels on the arterial peak flow (APF) and the venous emptying rate (VER) of the calves was studied with strain gauge plethysmography in 112 children 2-16 years of age, who underwent arterial (49 cases) or venous catheterization, mostly because of heart disease. The conditions on the catheterized side were compared with those on the other side, and the pre-catheterization values were compared with those obtained after completed catheterization. The catheterization procedure was proved to have no general influence on APF or VER, although it may have an effect in individual patients. APF was not affected at arterial or venous catheterization in children older than 8 years of age. In the younger children, APF was slightly decreased on the catheterized side after arterial as well as venous catheterization. This was considered to be caused by arterial spasm. On the following day APF was normal. A few patients in this age group had a marked reduction in APF caused by intense spasm or thrombotic occlusion after arterial catheterization. These patients will be accounted for separately. VER on the catheterized side was not significantly influenced after venous or arterial catheterization, irrespective of the age of the patients.

Adolescent↗
PubMed1975

Protrusion of calcified cervical discs into the spinal canal in children. A report of two cases.

The occurrence of calcified discs with large calcified masses protruding into the spinal canal in two children is reported. The discs affected had increased height in the acute stage. Air myelogram, performed in one case with muscular weakness in the hand demonstrated compression of the spinal cord. The condition improved on conservative treatment without sequelae in both cases.

Calcinosis↗
PubMed1975

Congenital oesophageal stenosis distal to oesophageal atresia.

Two cases with both oesophageal atresia and stenosis in the lower part of the oesophagus are reported. --The stenoses are congenital and most likely can be classified as malformations. --The stenoses had no clinical significance until the children began to eat solid food. Foreign bodies, which had been arrested in the oesophagus above the stenosis had to be removed several times. The importance is stressed of always including the distal oesophagus at the roentgenologic investigation of children with troubles after operation for oesophageal atresia.

Esophageal Atresia↗
PubMed1975

Strain gauge plethysmography for blood flow measurements in the legs of children.

The arterial resting flow, the arterial peak flow after 3 minutes of circulatory arrest to the leg, and the venous emptying rate were studied by strain gauge plethysmography in the calves of 85 children between 3 and 16 years of age. Most of the children had heart disease; therefore the values obtained can be regarded as reference values only for this type of patient.--The reproducibility of the results of the flow measurements was favourable and equal to that found in the examination of adults and of children using water-filled plethysmographs. --All of the flow functions investigated were significantly higher in the younger children and--but not always significantly--higher in boys than in girls. There was no difference between sides as regards arterial flow, whereas the venous emptying rate was significantly lower in the left calf. --Strain gauge plethysmography is recommended for assessment of circulatory complications after vascular catheterization in children aged 4 years or older.

Adolescent↗
PubMed1975

Comparison between the area and the volume of the air-filled ear space.

The area of the air-filled ear space, assessed planimetrically, was compared with the volume in cases with chronic otitis media with central perforation or recent traumatic perforation of the tympanic membrane. A significant correlation between the area and volume existed. In chronic otitis media the area was larger than in cases with traumatic perforation with equal volume. In these cases the area does not correlate completely with the volume of the functioning air space. The results favour the hypothesis that the pneumatisation of the temporal bone is affected by infection.

Adolescent↗