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EFW normal range

Estimated Fetal Weight (EFW) Calculator Normal fetal growth is important not only for a healthy pregnancy, but also for ensuring health and well-being throughout childhood and adolescence. The NICHD Fetal Growth Study, started in 2009, aims to set evidence-based standards for normal fetal growth and size for each stage of pregnancy. Learn more about the Study's findings Evaluation of Fetal Growth The average singleton fetus weighs about 80 grams (2.8 ounces) by the end of the first trimester and grows increasingly faster after 22 weeks to reach a maximum growth rate of almost 220 grams (7.8 ounces) per week by 35 weeks '. Growth then slows down and is about 185 grams (6.5 ounces) per week by 40 weeks for estimated fetal weight (EFW) from a large sample of EFW reference range and comparison with birth weight 551 The aims of this study were: (1) to establish French the normal plot showed clear deviation from a straight line11. The mean EFW was fitted using the polynomia A value that reads below 50% indicates that the measurement is lower than the average. Thus, a value that is above 50% indicates that the measurement is above average. A fetus is considered normal if they are between 10th and 90th percentile. [ The information provided here cannot substitute the advice of a medical professional

Fetal growth chart: 20 to 40 weeks of pregnancy. The lengths below are from head to foot (crown to heel). Pregnancy week. Average Length (cm) Average Weight (g) 20 weeks. 25.6cm. 300g. 21 weeks Under normal circumstances, the fetus' inherent growth potential yields a newborn of appropriate size (not too big or too small) with a wide range of 'normal' sizes. The maternal-placental-fetal units act in harmony to provide the needs of the fetus while supporting the physiologic changes of the mother The first definition for increased NT was a measure >95thpercentile for a given crown rump length (CRL) and a NT value of 2.5-3 mm, which was reported as a normal range for the marker. Recently, some studies indicated that NT >99thpercentile or NT value that exceeds of 3.5 mm are associated with the most common adverse outcomes.[6,7

AFI between 5-25 cm is considered normal; median AFI level is ~14 cm from week 20 to week 35, after which the amniotic fluid volume begins to reduce AFI <5 cm is considered to be oligohydramnio Umbilical Artery Doppler Reference Ranges. Umbilical Artery (UA) Impedance Indices are calculated by using ultrasound to measure the blood flow waveforms from the uterine arteries through a free-floating portion of the umbilical cord . The figure at the right shows the normal saw-tooth appearance of arterial blood flow through the umbilical cord The Interquartile Range (IQR) to Median ratio for all measurements was [No.] % (<30%). INTERPRETATION: Liver Stiffness Score. Degree of Fibrosis: Normal = F0 = 0.81 - 1.22 m/s, Non-fibrotic/Mild = F0-F1 - 1.23 - 1.37m/s, Moderate= F2-F3 1.38 - 2.00 m/s, Severe = F3-F4 2.01 - 2.64m/s. Updated 3/18/201

Dr. Amos Grunebaum, MD, FACOG is a Professor of Obstetrics and Gynecology, and among the world's leading authorities on fertility and pregnancy. Read Dr. Amos' full bio, the book about him Lessons in Survival: All About Amos, and a fictionalized account of his father's life in the novel, Through Walter's Lens. In addition to his current work, Dr. Amos is using his vast experience to launch. The diagnosis of fetal macrosomia is suspected when the estimated fetal weight (EFW) is greater than 4000 g in a diabetic patient and above 4500 g in a nondiabetic patient These two explanations are based on an Estimated Fetal Weight (EFW) calculations that use the ultrasound technique to evaluate a baby's weight inside its mother's uterus.. To estimate the fetal weight, we use the following measurements:. Abdominal circumference - circumference of the baby's belly, measured at the liver's height.(Advanced: an umbilical portion of the left portal vein should be.

By full-term, your baby may end up weighing less than 5 pounds or more than 9. Until about 20 weeks, babies are measured from the crown (or top) of the head to the rump (or bottom). This is because a baby's legs are curled up against his torso during the first half of pregnancy and very hard to measure Under normal conditions, FBM may be observed from 30% to 90% of the time; normal frequency is 30-70 per minute. 93, 94 In near-term fetuses, the inspiratory effort results in an inward anterior fetal chest wall movement of about 2-5 mm and an outward anterior abdominal wall excursion of 3-8 mm. 95 Although continuous breathing. The estimated fetal weight from the measurements of HC, AC and FL is derived from the formula reported by: Hadlock FP, Harrist RB, Martinez-Poyer J. In utero analysis of fetal growth: a sonographic weight standard. Radiology 1991; 181: 129-133 . The estimated fetal weight is plotted on the reference range for gestational age derived from the. EFW and birth-weight charts 3 EFW (g) BW (g) 400 500 700 1000 1500 2000 3000 4000 6000 400 500 700 1000 1500 2000 3000 4000 5000 6000 Figure 1 Association between estimated fetal weight (EFW), derived from model of Hadlock et al. using measurements of head circumference, abdominal circumference and femur length11, and birth weight (BW) in Dataset 1.Regression line is blue and line EFW=B

EFW (Hadlock) normal range (n = 18,958) Birthweight normal range (n = 58,934) • BW charts reflect a significant proportion of premature FGR neonates, reporting EFW from BW charts therefore misleading at 28-32 wks, 50th centile for BW = 10th centile for EFW! Salomon, Bernard and Ville. Ultrasound Obstet Gynecol 2007:29;550-555 Birth weight. Objectives: To construct gestational age (GA)- and estimated fetal weight (EFW)-adjusted reference ranges for tissue Doppler cardiac function parameters from 24 to 41 weeks' gestation. Methods: This was a prospective cross-sectional observational study involving 213 singleton pregnancies between 24 and 41 weeks' gestation. Myocardial peak velocities and myocardial performance index (MPI') were.

Fetal Growth Calculator NICHD - Eunice Kennedy Shriver

Iugr vldAssociation between fetal weight and amniotic fluid index

By comparison the head and AC measurements continue to progress, with overall EFW just within the normal range at the 12th centile. Case Discussion This was a fetus of a mother with achondroplasia, who was known to be FGFR3 heterozygote for achondroplasia following amniocentesis - a mutation seen in about 70% of cases 1 , with 100% penetrance Title: Fetal biometry at 14-40 weeks' gestation Created Date: 2/15/2003 8:05:56 A Your doctor is looking for the BPD measurement, as well as the other measurements, to be within what is considered normal range. The biparietal diameter measurement increases from roughly 2.4 centimeters at 13 weeks to approximately 9.5 centimeters when a fetus is at term Fetal Growth Calculator Percentile Range. Gestational Age (weeks) Race Measure 3rd Percentile 5th Percentile 10th Percentile 50th Percentile 90th Percentile 95th Percentile 97th Percentile. Abdominal Circ - 4 - Abdominal Circ. Abdominal Circ. 10.71 Non-Hispanic White - 10 - - 14

Gestational Weeks = Estimated Fetal Weight Percentile Chart +/- 1.28 Standard Deviation [ A fetus is considered normal if they are between 10th and 90th percentile ] Avg: Estimated Fetal Weight +/- SD 1.28: Gestational Weeks: EFW: 10th% 90th This range is equivalent to defining the empirical 90% CI for normal birth weight and, in the case of the most recent large-scale American study from 1991, this range is >1400 g (3 lb 1 oz). By using an 80% CI as an alternate measure, this range narrows to approximately 1100 g (2 lb 7 oz)

Estimation of Fetal Weight

Estimation of Fetal Weight - Perinatology

  1. Calculate EFW's on all pregnancies over 24 week's gestation. BPD, HC, AC, Femur and Humerus. Fetal Anatomy: Fetal Head: Lateral ventricles with measurements (normal < 10mm) Posterior Fossa with measurements (normal < 10mm) Cerebellum with transverse diameter. Cavum Septi Pellucidi. Nuchal fol
  2. 2561 grams / 5lbs, 10oz. 3089 grams / 6lbs, 12oz. 37. 2230 grams / 4lbs, 14oz. 2697 grams / 5lbs, 15oz. 3261 grams / 7lbs, 3oz. Tags: estimated fetal weight for twins fetal growth chart fetal weight chart full term for twins twin fetal growth chart twin pregnancy week by week Twin pregnancy: Your complete guide twin weight chart
  3. Second, new centile and z-score reference ranges can be calculated and graphed for fetal heart measurements that include aortic and pulmonary valve diameter, ventricular diameters, and cardiac circumference. This is based on the analysis of 2,735 fetal echocardiograms from a single institution
  4. ute or fewer —Moderate (normal)—amplitude range 6-25 beats per
  5. ation, known as Leopold's manoeuvres, shortly before term. Maternal BMI is a confounding factor because it is associated with both the fetal weight and the accuracy of fetal.
  6. The American College of Obstetricians and Gynecologists (ACOG) has issued new clinical management guidelines on fetal macrosomia. The term fetal macrosomia implies fetal growth beyond a specific.
  7. Reassuring well-being with fetal biometryin normal range. If <10th centile, small for gestational age and if >90th centile, large for gestational age If applicable: previous scan on date (DD/MM/YYYY) demonstrated the EFW to be on the [
Method of fundal height measurement

The ratio of these diameters is called the cephalic index (CI), with a mean value of 0.78 and a normal range (±2 SD) of 0.70 to 0.86. In the fetus with an abnormal cephalic index (noted in <2% of fetuses prior to 26 weeks' gestation), dates may be estimated more accurately using other fetal parameters, such as head circumference In general, the contribution of mobile sources to the total NOx level ranges from 60 to 80 percent: For stationary sources, it ranges between 20 and 40 percent. A significant portion of the NOx from stationary sources can be attributed to residential, commercial, and industrial sources, including industrial boilers To the best of our knowledge, normal ranges in relation to EFW have not been reported before. We provided a relatively large sample (506 cases) of PWD measurements over a wide range of GAs, from the 18th week of pregnancy to term. Additionally, these Z-scores were carefully examined to ascertain the normality A short femur length finding on ultrasound may indicate the need for further testing to rule out certain conditions. But it is also important to keep in mind the limitations inherent to using femur length as a marker for poor pregnancy outcomes. When femur length is below the fifth percentile, parents may be advised about a number of potential.

OP-901-502 lists the EFW normal level control band and this must be updated. OP-901-504 Inadvertent EFAS Actuation does not currently specify level range that assures reset and will OP-902-000 through 009 series of Emergency Operating Procedures contains information on the EFW level control and SG fill requirements Fetal growth restriction is commonly defined as an estimated fetal weight (EFW) that is below the 10th percentile for gestational age. It is associated with an increased risk of intrauterine demise, neonatal morbidity, and neonatal death; therefore, antenatal detection and surveillance with the optimization of delivery timing are necessary to improve pregnancy outcomes The AFI is normally 7 to 25 cm. In addition, each individual pocket of fluid should be 2 to 8 cm. Fluctuations outside of this range define oligohydramnios (too little amniotic fluid) or polyhydramnios (too much amniotic fluid). 1. 2. 3. Location and appearance of the placenta and its relationship to the internal os Estimated fetal weight (EFW) Most common method Sensitivity, specificity, positive and negative predictive values of EFW for FGR <10 percentile are approximately 90, 85, 80, and 90 percent, respectively, when performed proximate to delivery Sensitivity is higher in severe FG

Fetus Growth Measurement Percentile Charts Graphs

  1. 1 Percentile Five Is The Magic One. If there can be a magic number with percentiles that are so flexible, unsteady, and acting more as guidelines, it is percentile 5. Ideally, babies will be born well above percentile 5. Basically, percentile 5 means that they are just scraping into the healthy medium with percentiles
  2. Although the anomaly scan is often called a 20-week scan, you may have it any time between 18 weeks and 20 weeks plus six days. (NICE 2008, PHE 2014, NHS 2015a) . This image shows a baby's face and hands at 20 weeks, and gives you an idea of what you will be able to see at this scan. Seeing your baby on a screen can be really exciting
  3. e whether the fetus is average, larger or smaller in size for its gestational age. If the fetal weight estimate is below the bottom 10 per cent line on the graph, it is considered to be small for gestational age (SGA)
  4. In fact, we recently compared 2 methods for estimating fetal weight, a single-center study from the 1980s in Texas 27 vs a modern, large-scale international collaboration, InterGrowth21st (IG21). 28 Each study had derived an equation to calculate the ultrasonic EFW and had defined a normal range on the basis of their study population. We.

The common use of singleton fetal growth standard to access twin growth might lead to over-monitoring and treatment. We aimed to develop fetal growth standards for Chinese twins based on ultrasound measurements, and compare it with Zhang's and other twin fetal growth charts. A cohort of uncomplicated twin pregnancies were prospectively followed in 2014-2017 The fetal EGA range was 26.9-37.9 weeks with a mean EGA of 33.1 weeks. For all subjects, the assigned/clinically used fetal EGA was recorded from the initial ultrasound exam reports. Spearman's rank correlation was used to summarize the relationship between EFW and EGA before and after correction An estimate of fetal weight (EFW) can be calculated by combining the above measurements. Additionally, what is normal FL in pregnancy? Femur Length (FL) Measures the longest bone in the body and reflects the longitudinal growth of the fetus. Its usefulness is similar to the BPD. It increases from about 1.5 cm at 14 weeks to about 7.8 cm at term

Fetal growth chart: length and weight - BabyCenter Indi

A normal heart rate range at this stage of gestation is 120 to 180 beats per minute. The ultrasound technician will also check the umbilical cord to ensure it meets the abdomen and has three vessels In contrast EFW charts can be adjusted according to individual pregnancy characteristics. C6 If the EFW is below the 10th centile but the population based individual biometry is within normal ranges, what should we do? Customised EFW is more accurate and is better able to distinguish between normal and pathological growth

Estimated Fetal Weight & Growth Percentile Calculator

Normal Fetal Growth A fetuses growth is an expression of genetic potential that is not constrained by internal or external factors Normal singleton fetal growth is approximately: 5g/day at 14 to 15weeks of gestation 10g/day at 20 weeks of gestation 30 - 35g/day at 32 to 34 weeks of gestation After 34 weeks of gestation the growth rate decreases On June 4, 2015, at 2:24 a.m., the EFAS system was reset and EFW was placed in standby. At 5:27 a.m., the EOP for Loss of Main Feedwater was exited and the Normal Operating Procedure for Plant Shutdown was entered. The plant was stabilized in Mode 3 at normal operating temperature and pressure, with heat removal controlled by Atmospheric Dum Exercise helps keep blood sugar levels in the normal range. You and your ob-gyn can decide how much and what type of exercise is best for you. In general, 30 minutes of moderate-intensity aerobic exercise at least 5 days a week is recommended (or a minimum of 150 minutes per week). Walking is a great exercise for all pregnant women ternal EFW independently. We also calculated the sensitivity, specificityand positive and negative predictive values for the ultrasound, clinical and maternal EFW compared with actual birth weight. Normal birth weight was considered as 2500-4000 g. We used ROC curve with the chi-squared test to compar

Normal reference range of fetal nuchal translucency

At birth, infants are generally weighed as soon as possible and may also be monitored during the neonatal period. In Australia, the average birthweight for all babies born: (1991) 3,350 grams, (2004 3,370 grams and (2015) 3,327 grams. Also in 2015 6.5% (19,852) of liveborn babies were of low birthweight SGA = EFW < 10th percentile Constitutionally small 70% • EFW 4 to 10th percentile • UAD -N • CPR - N • Ut AD - N • Placental histology - normal • Maternal biochemical parameter - Normal • Good outcome Intra uterine growth restriction 30% • EFW < 3rd percentile or • UAD - Abnormal or • CPR - < 5th percentile or. Flow/kg decreased for both cords, with the SUA values twice those of normal cords. Arterial diameter and velocity increased, but to a greater degree in SUA. Velocimetry, although in the normal range, decreased progressively with the resistance indices always lower in the SUA cord. EFW and AFI were the same for both groups The Canadian Perinatal Surveillance System (CPSS) has developed this new population-based Canadian reference for birth weight for gestational age, which included data on all singleton infants born in Canada (with the exception of the province of Ontario) between 1994 and 1996 at 22 to 43 weeks gestation, comprising 347,570 males and 329,035. Table 1: Amniotic fluid index and estimated fetal weight values for the gestational age ranges Table 1 also shows that the mean AFI and EFW values for 27-29 weeks gestation were 172.1 mm and 1250.19 g respectively; 30-32 weeks were 170.3 mm and 1,648.04 g; 33-35 weeks were 162.3 mm and 2,273.54 g; 36-38 weeks were 144.0 mm and 2,906.12 g; and.

A Journey of My Triplet Pregnancy – Week by Week

Amniotic fluid index Radiology Reference Article

  1. RESULTS: Six hundred and twenty eight normal fetuses from 635 pregnant women were measured for fetal biometry charts. The comparison of the presented charts with others was significantly larger than the North in all parameters (except AC), but was consistent to those from the South (only BPD and FL)
  2. Fundal height measurements include skin and subcutaneous fat as well as the uterus and its contents, and should NOT be equated with fetal weight. If however growth is accelerating, i.e. steeper than the normal fundal height curves on the chart, then further tests including a scan (for EFW) and a GTT may be indicated, according to local protocol
  3. Question: My EFW 2475 gm+365gms it is normal or not Answer : No dear, it's less as per weeks of pregnancy. 39 weeks baby weight should be around 3 kgs. I hope by the time of delivery baby will reach 2.5 kgs which considered marginal range of birth weight
  4. Fetus 2: Biophysically well fetus with normal growth. Est. fetal weight 1419g (3lbs 2 ozs). The EFW is on the 80 th % Fetus 3: Biophysically well fetus with normal growth. Est. fetal weight 1100g (2lbs 7 ozs). The EFW is on the 40 th % Baby two had a growth spurt and was now up to the 80th percentile for estimated fetal weight
  5. The results of each part of the test -- heart rate, breathing, body movement, muscle tone, and amount of amniotic fluid -- are added up to form a total score. A score of eight to 10 means your.

Umbilical Artery Doppler Reference Range

To estimate diagnostic parameters of EFW in predicting LGA at these scheduled weeks, we apply a Bi-Normal model to each of the four subset data. The estimated ROC curves and AUCs are provided in Fig. 3 and Table 1 , respectively EfW process description 4.1 Overview During normal operation, the steam output from these 5 boilers is typically 500tph and is then fed into back pressure turbines that produce a range of steam pressures (i.e. high intermediate pressure (HIP), intermediat Twins were eligible when the EFW of one twin was below the 10th percentile and there was almost complete growth restriction for more than two weeks, while the EFW of the other twin was within the normal range based on a weight nomogram. We excluded cases where the FGR fetus had an abnormal karyotype Founded in 2003, Richmond-based Estes Forwarding Worldwide (EFW) is a domestic and international freight forwarder. At EFW, we are always on. Our commitment to personal service has made us a leader in logistic solutions across the globe. With offices across the country, EFW offers a full range of domestic and international solutions—including air, ocean, ground and international. correlation of the EGA with the normal ranges of the estimated fetal weight (EFW) correlation of the EGA with the normal ranges of the amniotic fluid index (AFI) correlation of the EGA with the normal range of fetal length (crown to rump) before 20 weeks correlation of the EGA with the normal range of fetal length (crown to heel) after 20 week

AC means abdominal circumference of the baby which is normalfor this gestational age. HC means Head circumference which is normal. In a normally growing baby HC must be > AC. FL means Femur length. BPD means Biparietal Diameter which should not be more than 9.5cm here it is 7.34 cm. It indicates the chance of normal delivary Average fetal length and weight chart. istock.com / yacobchuk. During pregnancy, you'll see your bump get bigger as your baby develops inside your womb (uterus). By 40 weeks, the average baby weighs 3.5kg (7.6lb), and is about 51.2cm (20.2in) long from head to heel. (Hill 2019

Liver Elastography UW Ultrasoun

  1. For example, consider the quantile-quantile plot for the individual country 0.05 quantile (i.e., the 5th percentile) for EFW versus the global 0.05 quantile: the 5th percentiles at low values of EFW cannot be differentiated because of the relative smallness of EFW at early pregnancy . However, at the end of gestation (high values of EFW), the.
  2. Normal ratio: <36 weeks = 1:1 >36 weeks - ratio decreases as the AC increases. This ratio helps to differentiate between symmetric IUGR, asymmetric IUGR and a normally proportioned fetus. Symmetric IUGR - ratio is normal. Asymmetric IUGR - ratio increases as the head size is maintained at the expense of the AC (Brain-sparing effect)..
  3. Normal contractor effort and normal Government monitoring will likely be able to overcome any difficulties. NAVAIR formed a competitive range that included both offerors' proposals. Id. Both offerors submitted Final Proposal Revisions on August EFW filed its complaint in this Court on January 27, 2020. EFW's claims ar
  4. ed before or after birth
  5. Temperature range Type of load and soil Maximum load, Maximum spin Cottons 90°C — Cold ( ) White cotton and coloured cotton. Normal soil and light soil. 6 kg, 1000 rpm Eco Cottons 1) 60 °C - 40 °C White cotton and colour-fast cotton. Normal soil. 6 kg, 1000 rpm Synthetics 60 °C— Cold ( ) Synthetic items or mixed fabric items. Normal soil

According to the WHO Multicentre Growth Reference Study Group recommendations, boys and girls have different growth trajectories after birth. Our aim was to develop gender-specific fetal growth curves in a low-risk population and to compare immediate birth outcomes. First, second, and third trimester fetal ultrasound examinations were conducted between 2002 and 2012 The 97th centile gives an indication where the upper end of the normal range is - actually 3% of normal infants and toddlers will be above the 97th centile. So anywhere between the 2nd and 98th centiles is appropriate growth. It can be normal to be slightly above the 98th centile or slightly below the 2nd centile The anomaly scan, also commonly called as the level II scan or the TIFFA (Targeted Imaging for Fetal Anomalies) scan, is the most important scan of the second trimester. This mid-pregnancy scan takes a close look at your baby and your womb (uterus). It is done between 18 and 20 weeks of pregnancy. The main purpose of the scan is to check that. speaking in the Leaders' Panel at Energy from Waste 2021. The panel was also clear in its vision for EfW as an enabler for green recovery, starting with improving the efficiency of our plants, working with new end markets that will want the chemicals, fuels and heat we can generate and displacing other more polluting sources, and then embracing. Olsen IE et al. BMI curves for preterm infants. Pediatrics. 2015;135:e572-e581. Reproduced with permission. The authors specifically grant to any health care provider or related entity a perpetual, royalty free license t

Hadlock Ultrasound Measurements Based on Gestational Age

o With onset of severe features or a severe range blood pressure of systolic ≥ 160 or diastolic ≥ 110, plan for triage evaluation Fetal Monitoring in ATU Indication Ultrasound Type EGA start Frequency NST or BPP1 EGA Start Frequency Hypertension (chronic) EFW 24 Monthly Yes 32 Weekly Fetal Monitoring Frequency with Preeclampsi The normal range for infants from 1-5 months old is 50-200 ng/mL. Hematocrit - Hematocrit is a blood test that measures the percentage of the volume of whole blood that is made up of red blood cells and is used as an indicator of anemia. The normal hematocrit range for infants 0-6 months is 37.4 - 55.9% for females, and 43.4 - 56.1% for males

Fetal Biometry and Growth Radiology Ke

A normal rate of growth means the child's growth points closely follow a percentile line on the chart. We usually don't worry about insufficient (or excessive) growth until a child's growth rate. EFW ( estimated fetal weight ) -1502 grams BPD - 80 mm ( biparietal diameter ) HC - 284 mm ( head circumference ) AC - 272 mm ( abdominal circumference ) FL - 59 mm ( Femur length ) These are standard measures ( averages ) compiled from thousands of pregnancies. A fetus is normal if it falls between the standard deviations

Moreover, in order to detect those fetuses who will grow below the lower level of the normal range in the last month of pregnancy, we suggest that those with EFW below the 28th centile at 36 weeks should be rescanned later in pregnancy to identify prenatally as many cases as we can of SGA newborns To compare MRI-EFW with US-EFW using the Hadlock formula,25,26 by comparing the area under the receiver operating curve (AUROC) for the prediction of LGA neonates (≥95th centile for gestational age), using the normal ranges as described by Yudkin et al.2 During the two-week period, 1667 ultrasound scans were performed by 65 operators and included in the study. Mean maternal age was 31.6 years+/− 5.0 (range 18-46 years) and mean BMI at the.

Check Your Baby&#39;s Fetal Growth and Weight PercentileDoppler in IUGRPPT - Epilepsy in Pregnancy PowerPoint Presentation - ID

However, estimated fetal weight of less than the 10th percentile was only associated with the risk of which included a chart of the normal range of measurements for fetuses in relation to gestational age. SGA infants were still at increased risk of morbidity if the indicator of FGR was normal. By contrast, an EFW of less than the 10th. The baby's weight at 20 weeks is about 10.5 ounces. The head circumference at 20 weeks is between 15 to 20 centimeters in size. The humerus -- the long bone in the upper arm -- can range from 2.5 to 3.5 centimeters in length. The femur -- the long bone in the upper leg -- measures around 2.8 to 3.8 centimeters in length The EFW-MW is a multi-wattage heater designed to be an economical, large wattage wall heater, flexible enough to heat any space. It is commonly used in apartment construction to heat rooms up to 400 square feet, or where a remote thermostat is required on a 4000 Watt-style heater.The NiChrome open-coil element dissipates heat quickly and offers multiple wattage options, tailoring the heater to.