No abstract available.
Ultrasonics

No abstract available.
Ultrasonics*

No abstract available.
Ultrasonics*

No abstract available.
Ultrasonics

Ultrasonic pachymetry was carried out in 300 eyes of normal, myopic, and senile cataract patients with Alcon Surgical Pachymeter. The mean central corneal thickness was 0.527mm+/- 0.034mm. Corneal thickness wa significantly correlated with age, axial length, and sex. No statistical correlation was found between corneal thickness and the right or left eyes, corneal curvature, and ocular tention (within normal range). Pachymetric results were consistent if a good applanation of the probe occurred. Thus, reliable data could only be obtained by skilled user.
Ultrasonics ; Eye

No abstract available.
Osteotomy ; Ultrasonics

No abstract available.
Lipectomy* ; Ultrasonics*

PURPOSE: The purpose of this study was to evaluate the effect of transscleral pressure on the thickness and hydration of the human sclera. METHODS: Scleral sections excised from moist-chamber-stored human globes were mounted in a perfusion chamber that can create transscleral pressure. The scleral thickness was measured at 15-minute intervals using ultrasonic pachymetry with pressure changes of 15, 30, and 60 mmHg every 2 hours. The scleral hydration was measured by maintaining a constant pressure (15, 30, and 60 mmHg) for 4 hours, weighing the hydrated tissue, then drying for 24 hours at 120degrees C, and finally weighing the dry tissue. RESULTS: The changes of scleral thickness from the initial control thickness in the 7-mm perfusion chamber (n=6) were -0.38+/-2.11%, 0.26+/-2.99 %, and -3.92+/-3.40% at 15, 30, and 60 mmHg, respectively. In the 10-mm perfusion chamber (n=5), the thickness changes were -0.56+/-1.35%, -1.05+/-1.63%, and -2.71+/-1.60% at 15, 30, and 60 mmHg, respectively. Scleral thickness was slightly decreased with the increase of transscleral pressure. There was a statistically significant decrease in scleral thickness from 30 mmHg to 60 mmHg in the 7-mm perfusion chamber (p<0.05). Changes of the scleral hydration value in the 7-mm perfusion chamber were -0.79+/-1.06% (n=5), 0.66+/-1.40% (n=5), and 0.05+/-1 . 3 0 % (n=5) at 15, 30, and 60 mmHg, respectively. There were no statistically significant changes in the scleral hydration with transscleral pressure change of 0~60 mmHg (p>0.10). CONCLUSIONS: The scleral hydration remained essentially unchanged with the transscleral pressure change of 0 ~ 60 mmHg, whereas the scleral thickness showed a slight decrease with the increase of transscleral pressure. Further histologic studies will be needed to assess the ultrastructural change of human sclera in the future.
Humans* ; Perfusion ; Sclera ; Ultrasonics

660 times of measurement of biparietal diameter in combining with analytical computer were performed on 74 female subjects of 16-42 week age of pregnancy (9 times for each subjects) to determine the fetal age. Results showed a close relation of biparietal diameter and fetus age. The speed of growth of biparietal diameter was high initially then lower gradually, with the age of 16-30 weeks, BD grown up 3 mm each week, and with the age of 31-37 weeks: 2 mm and 38-40 weeks: 1 mm
Ultrasonics ; Women ; Gestational Age

The thyroid volume and ultrasonic image of 356 healthy adults and 133 Basedow patients were assessed. The results are as follow: Thyroid gland of Basedow patients has low, diffusive echo and no steady border... These volumes are bigger than that of healthy adults (39.18ml+/-19.02ml, n=133 vs 12.06+/-4.07, n=356), p<0.0001.
Ultrasonics ; Graves Disease