In this essay, an optical arrangement for the measurement of DYNAMIC WEIGHT, by means of conducting a thin ray of light through it, is designed in order to enhance the measuring accuracy in the WEIGHT-ESTIMATION device. In this arrangement, CCD is responsible for producing raw data for processing. An artificial neural network type, RBF, is also used to improve the quality and speed of the measurement. While the scale of the WEIGHT-ESTIMATION device is oscillating, by applying the WEIGHT on the scale, the neural network by sampling the proportionate wave-shape yields the WEIGHT of object with high accuracy and high speed.

Background- Considering the hazards of macrosomia and low birth WEIGHT, the ESTIMATION of birth WEIGHT before delivery is of paramount importance. An easy-to-do method of birth WEIGHT ESTIMATION is fundal height measurement using only a tape measure. In the present study, we determined the association between fundal height and actual birth WEIGHT and calculated the specificity, sensitivity and positive and negative predictive values for the method. Methods- Standard fundal height was measured on 450 pregnant women who were hospitalized in Imam Khomeini and Shariati Hospitals in Tehran, Iran, for delivery during a 6- month period in 2000. All measurements were performed within the 5 last days of pregnancy. Inclusion criteria were normal pregnancy, cephalic presentation of the fetus and maternal WEIGHT of less than 91 kg. The parturient patients with systemic disease, history of stillbirth, poly or oligohydramnios, placental abnormality, twin or multiple pregnancies and fetal congenital anomaly were excluded from the study. Linear regression analysis was used to determine the association of fundal height to actual birth WEIGHT. Results- A prospective linear regression was found between fundal height and actual birth WEIGHT (r = 0.88, p < 0.01) correct ESTIMATION of birth WEIGHT was obtained in 349 (77.5%) of cases. The specificity of estimated WEIGHT was 91.5% when the real birth WEIGHT was within the normal range. Conclusion- For actual birth WEIGHTs in the normal range, our results showed that the normal range of fundal height was 27 to 35 centimeters. For a fundal height measurement outside of this range, an abnormal and a high-risk delivery should be expected.

Background and purpose: WEIGHT-based dosing of medication is used in the emergency and anesthesia departments. Ideally each patient should be weighed prior to dosing. However, this may not always occur, especially in the anesthesia department. The purpose of this study was to assess the prediction formula for actual patient WEIGHT by the sum of head WEIGHT and estimated Anesthetic personnel.Materials and methods: Diagnostic descriptive study was used for patient’s body WEIGHT, which had been estimated by anesthetic personnel's, while head patient WEIGHT was measured by instrument during anesthesia. Data was analyzed by descriptive statistics and regression linear and compared with ANOVA test. The significance level in this study was.Results: The mean total WEIGHT of patients that were estimated by the personnel of anesthesia was 65.7±11.7 kg. The mean actual WEIGHT was 65.2±13.7 kg. The correlation coefficient between estimated actual WEIGHTs is not significant.Conclusion: This study showed that adding head WEIGHT to the ESTIMATION WEIGHT by anesthetic personnel, results in a more accurate WEIGHT ESTIMATION than head Wight alone.

OBJECTIVE: The ESTIMATION of WEIGHT of the fetus by physicians and midwives affects on antepartum and intrapartum cares and the choice of suitable method for the mode of delivery. This study was done to evaluate the value of the clinical examination and ESTIMATION of fetal WEIGHT by using Jhonson formula in term pregnancy. METHODS: In this descriptive and analytical study, 230 term pregnant women in their early stages of labor with cephalic presentation referred to Niknafs hospital in Kerman, were consecutively chosen. Last menstrual period, parity, the round of arm, fundal height in 4 different positions after voiding, and neonatal WEIGHT were registered for each patient. Estimated fetal WEIGHT was calculated by Jhonson formula. FINDINGS: There was a significant relationship between neonatal WEIGHT and the height of uterine fundus 'in different positions, especially in supine position with flexed knees. Correlation coefficient in all positions was more than 0.68. Also, correlation coefficient between estimated and true fetal WEIGHT in supine position with flexed knees was 0.50 (p =0.008) and in three other positions was more than 0.48 (p=0.01). CONCLUSION: Using of clinical examination and Jhonson formula are recommended for ESTIMATION of fetal WEIGHT in all obstetric centers, especially primary centers.

Background and Objective: Fetal WEIGHT and gestational age are important factors in evaluation of neonatal safety and basic prediction factors in outcome of prengnancy and satisfactory criterion in decision of management in obstetrice and neonatalogy. Therefore finding a method for pridiction of fetal WEIGHT is critical. The present study employs, detect on value of Jahnson"s formula in prediction of fetal WEIGHT. Materials and methods: In this analytic study, 223 pregnant women who had a safe, live, singlton fetus, with cephalic presentation were admithed to labor ward at Dezyani hospital. Medical or obstetrical complication was excluded. Subjects selected by purposive sampling. For collecting data: first, using the same flexible tap measure calibrated in centimeters by using this tap, the fundul height was measured. The fundul heigh was also taken in Jahnson"s formula and estimated WEIGHT was also calculated each cases. The actual WEIGHT of post delivery was measured immediately. Data analysis was done by corrolation test paired t test. Results: This study shows mean estimated fetal WEIGHT (3730±546) were higher than the actual birth WEIGHT (3270± 429). Conclusions: This study indicates that Janson"s formulal is not a good way to estimate fetal WEIGHT.

Background: Accurate estimated fetal WEIGHT (EFW) has importance in the management of labor and delivery. Estimated fetal WEIGHT was done in two sonographic and clinical ways (Palpation of abdomen). Many studies have been conducted for comparing clinical and sonographic EFW. With regard to contra indications and absence of studies in this area, this research was conducted on women admitted due to termination of pregnancy in Shabih Khani Maternity Hospital in 1383 Materials and Methods: This research as a cross-sectional study was done on 100 women with gestational 37/42-week ages admitted for termination of pregnancy. Excluded criteria consists of premature rupture of membrane, placenta abruption- placenta previa, preeclampsia, fetal abnormality, amniotic fluid disorder Clinical ESTIMATION in labor was performed by senior resident or obstetrician and sonographic ESTIMATION was performed by sonographists. The actual birth WEIGHT was determined by electronic scales and recorded in the chart immediately after delivery. Accuracy of birth WEIGHT ESTIMATION was determined by calculating the percentage error, and the proportion of estimates within 10% of the actual birth WEIGHT.Then processing of information performed by chi-square, fisher exact test and relative risk was determined Results: study on 100 pregnant woman showed mean age was 22.5±14.5 and mean gestational age was 39.2±10.9 and mean birth WEIGHT was 3513±370.3. Birth WEIGHT in %10 of new born was less than 3000 gr and %12 of birth WEIGHT was more than 4000 gr. In total pregnant women clinical ESTIMATION in (83 women) 83% and sonographic ESTIMATION in (67 women) 67% was acceptable in which statically were important (P= 0.009).In birth WEIGHT less than 3000 gr sonographic estimate better than clinical estimate p<0.03.Conclusion: regarding that most of fetus is reneged between 3000-4000 gr. accuracy of clinical ESTIMATION is often more than sonographic ESTIMATION so that we can perform EFW by simple WEIGHT and without cost. But in cases such as low birth WEIGHT that sonographic ESTIMATION of WEIGHT as direct diagnosis are defined and in obese women due to difficulty of clinical ESTIMATION, we suggest sonographic ESTIMATION to use.

Objective: This study was performed for evaluation of accuracy of fetal WEIGHT ESTIMATION by clinical & ultrasonographic methods in Iranian population .Meterial & Method:This prospective study was conducted on two hundred preg .nant mothers that reffered to obstetric department during years 1378 & 1379 . Findings:Our study showed that there was statistically significant difference between clinical estimate of fetal WEIGHT and actual birth WEIGHT , as well as between ultrasound ESTIMATION and actual birth WEIGHT. The mean error of clinical ESTIMATION was 101g ,or 32g/kg, for a 3.2% error. The error of ultrasound in the same population was 141g, or 45g/kg, for a 4.5% error. Analysis of these data revealed statistically significant difference between the mean error of clinical ESTIMATION and ultrasound ESTIMATION of fetal WEIGHT. Conclusion:Our study indicates that the mean clinical estimate of fetal WEIGHT is more accurate than ultrasound for the ESTIMATION of fetal WEIGHT in our population. This has important implications for developoing countries where , there is a lack of technologically advanced ultrasound machines capable of performing sophisticated functions like fetal WEIGHT ESTIMATION.