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Biomedical subjects

S Anda

Publications and source records attributed to S Anda.

At least 37 records · Page 2Linked to original sources
PubMed1990

Femoral anteversion in adolescents and adults measured by ultrasound.

Femoral anteversion (AV) was determined by ultrasound in 40 adolescent and adult patients with rotational disorders of the femur, and the results were compared with AV measurements by biplanar roentgenography. With the patients supine, their knees flexed 90 degrees, and their lower legs strapped in the vertical position, one scan only of the proximal femur was needed to measure the anteversion by ultrasound. The transducer was tilted until the desired measuring line appeared horizontal on the monitor screen. The angle of tilt of the transducer, which represented the AV angle, was measured with an attached clinometer. The correlation between ultrasound and roentgenographic AV angles was high, indicating that reliable results were obtained by ultrasound. The preferred reference line was the head-trochanter tangent, which is recommended for clinical use. Consistently greater AV values were measured by ultrasound than by roentgenography. Thus, 10 degrees should be subtracted from the ultrasound values in order to obtain the real AV angles. One of the benefits of ultrasound is the elimination of radiation hazards to the patients. Ultrasound is recommended as a screening technique for patients with rotational disorders of the femur.

Adolescent↗
PubMed1990

Pelvic inclination and spatial orientation of the acetabulum. A radiographic, computed tomographic and clinical investigation.

In a study of 40 young adults the pelvic inclination measured by a specially constructed inclinometer was found to be the same in the supine and standing positions when related to the horizontal and frontal planes, respectively. Consequently supine CT measurements of the hip are also representative of corresponding standing angles. The variations of the acetabular anterversion and the sector angles on CT of the hips in 5 adult corpses were measured by angulating the gantry in increments of 5 degrees to +/- 20 degrees. An approximate linear relationship was found for all parameters, the acetabular anteversion varied 0.5 degree with 1 degree pelvic rotation, and the sector angles 0.7 degree. A theoretic mathematical model for the variation of the acetabular anteversion outside the measured range employing a sine curve is introduced.

Acetabulum↗
PubMed1989

[Surgical treatment of renal artery stenosis].

Renal artery stenosis may be the cause of hypertension and reduced renal function. The aim of surgical treatment is to eliminate or reduce the hypertension and to preserve or improve kidney function. At our hospital the standard surgical procedure is aortorenal bypass. We present the results of this procedure in the treatment of 23 patients (27 bypasses) during a five-year period. During the same periode nine patients were treated with percutaneous transluminal renal angioplasty. Arterial reconstruction of the renal artery is a relatively simple and cost-effective treatment. Furthermore, the rate of postoperative complications is low.

Aged↗
PubMed1989

[Orbital blow-out fractures. Therapeutic results].

37 patients treated surgically for orbital blow-out fractures were reviewed retrospectively. 29 had diplopia before and four after operation. The diplopia was present only in extreme gaze positions and was not troublesome to the patients. Enophthalmus was present in 19 patients preoperatively and in six postoperatively. Of six patients treated conservatively one developed a moderate enophthalmus. There were no significant postoperative complications.

Adolescent↗
PubMed1989

[Idiopathic benign non-infectious segmental vertebral sclerosis].

Idiopathic, benign, non-infectious, segmental, vertebral sclerosis is a self-limiting condition, which must be differentiated primarily from infectious spondylo-discitis and sclerosing vertebral metastases. The typical patient is a middle-aged, parous women with pain in the lower back region. Radiologically there is a characteristic half-dome shaped supradiscal sclerosis in the anterior and middle part of the affected vertebral body, which is always of normal height and there is never an abnormal paravertebral soft tissue mass. The erythrocyte sedimentation rate is normal. It is important to recognize this condition in order to avoid unnecessary examinations.

Adult↗
PubMed1989

Dental and jaw changes in primary hyperoxaluria.

A case of teeth and jaw changes in primary hyperoxaluria is described. The patient, a 25-yr-old man, was treated by kidney transplantation twice, and finally by combined liver and kidney transplantation. The teeth and jaw changes consisted of deposition of oxalate crystals in the gingiva, in the pulp and in the vicinity of bone and dentin. The resorption of bone and dentin was extensive.

Adult↗
PubMed1989

Regression of femoral anteversion. A prospective study of intoeing children.

To study the spontaneous regression of femoral anteversion, 30 children referred to the outpatient clinic for intoeing were followed until at least 15 years of age. The mean observation time was 9 (7-12) years, and all the children were examined three times during the growth period. The mean radiographic angle at the first examination was 42 degrees, at the second examination 36 degrees, and at the last examination 28 degrees. The mean decrease of the AV angle per year was 1.5 degrees, with a considerable range (0.2-3.1 degrees). The mean internal rotation of the hip decreased from 74 degrees to 53 degrees during the observation period, and the external rotation increased from 19 degrees to 37 degrees. While all 30 children had an intoeing gait at the first examination, this disappeared in all but 5 children.

Bone Diseases, Developmental↗
PubMed1989

Osteotomy for femoral anteversion. Complications in 95 children.

Totally, 95 children with increased femoral anteversion had derotational substrochanteric osteotomy with plate fixation. The mean anteversion angle was reduced from 48 degrees to 4 degrees, internal hip rotation from 81 degrees to 42 degrees, and external rotation increased from 9 degrees to 48 degrees. All the osteotomies healed, but serious complications occurred in 13 of the 95 patients. Because of the risk for complications and the trend towards spontaneous regression of femoral anteversion with age, we recommend a much more conservative attitude with regard to operative treatment.

Adolescent↗
PubMed1988

Accuracy of visually estimated bone mineralization in routine radiographs of the lower extremity.

In order to determine the accuracy of reports of demineralization based on observations of routine radiographs of the peripheral skeleton, pairs of radiographs with known difference in bone mineral density (BMD) were shown to a panel of medically qualified observers. No significant difference in the rate of correct identification of osteopenia of metaphyseal and diaphyseal bone was observed. Experienced observers were more accurate than their juniors. The probability of correct identification was greater than 0.5 at all levels of BMD difference, and in general increased with increasing BMD differences, reaching a probability of 0.7 at a BMD difference of 30%. The probability increased considerably when the assessment relied on the majority vote of three or more observers. It is concluded that it is inadvisable for a single observer to judge BMD when studying routine X-ray studies of the peripheral skeleton.

Adolescent↗
PubMed1987

Femoral anteversion in children measured by ultrasound.

The femoral anteversion was measured by ultrasound and biplanar radiography in 57 children, most of whom had clinical signs of increased anteversion. A modification of previously reported ultrasound techniques was introduced, as the transducer was tilted instead of being kept horizontally. Four different modes of ultrasound examination were evaluated. The most appropriate technique involved only one ultrasound scan at the hip level. The correlation between the results of ultrasound and radiography was good with less than 10 degrees discrepancy in the majority. Ultrasound is suitable for screening children with rotational disorders of the femur. The main advantage of the method is that exposure to radiation is avoided.

Bone Diseases, Developmental↗