Methods:The amount of gastric volume was estimated in 20 preterm infants with the use of three-dimensional ultrasound (3D-US) volumetry method (VOCAL). The procedure of gastric emptying was determined by three volume measurements of the gastric volume after routine feeding (0-, 30-and 60-minute-volumes). In the control group 0-, 30-and 60-minute gastric volumes were measured in the same infants with the same volumetric method one day before the ophthalmologic examination. The preterms were born at the 30.50 ± 2.67 gestational week with an average of 1454.50 ± 400.23 g birth weight. Tropicamide and phenylephrin hydrochlorid were used in a dose of 0.25 mg and 0.15 mg three times before the eye examination. Results: Contrary to earlier reports the authors did not find significantly delayed gastric emptying with the doses of mydriatics. At the time of the second and third measurement the authors found 64.98% and 40.02% of gastric volume in the control group and a 68.51% and 44.27% of gastric volume after instillation of mydriatics, respectively. Conclusions: Current dose of mydriatics does not seem to delay gastric emptying significantly, the doses administered in routine clinical practice can be used safely on the day of screening examinations for ROP. The gastric volume measurement in preterm infants using 3D-US volumetry is rapid, painless, reproducible, and non-invasive.
OP10.08The relationship between previous elective or emergency Caesarean section and time-to-next-pregnancy interval on Caesarean scar size and residual myometrial thickness in subsequent pregnancy Objectives: To assess the effect of previous Caesarean delivery type (emergency vs. elective) and time-to-next-pregnancy (TNP) interval on scar size and residual myometrial thickness (RMT) in subsequent pregnancy. Methods: Ninety-nine consecutive pregnant women with a previous Caesarean delivery were prospectively scanned at 12 weeks gestation and followed up to term. Type of last Caesarean delivery (emergency vs. elective) and time-to-next-pregnancy (TNP) (years) were documented. Caesarean scar size based on three dimensions (width, depth in sagittal plane and length in transverse plane, with the formula width × depth × length/3) was calculated at 1 st , 2 nd and 3 rd trimesters. In addition, the residual myometrial thickness (RMT) was measured in the sagittal plane. Two-sample t-test was used to investigate the effect of previous Caesarean delivery type and TNP on scar size and RMT. Results: The final study group consisted of 82 cases delivered at term. No significant correlation was found between the type of previous Caesarean delivery and scar size or RMT at any of the three trimesters. Pregnancies with TNP < 4 yrs had a significantly larger scar size in the second and third trimester than pregnancies with TNP > 4 yrs (P-value 0.02 and 0.03, respectively). However, this time interval has shown no effect on RMT.
Conclusions:We have shown that shorter time-to-next-pregnancy interval appears to be associated with larger Caesarean section scars in mid...
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