You can calculate your BSA (body surface area) here. sharing sensitive information, make sure youre on a federal Nippon Eiseigaku Zasshi 1968;5:443-50. This evaluation method was developed by a plastic surgeon who did a study on women who required breast reduction surgery for medical reasons. The Schnur scale determines the therapeutic necessity of breast reduction surgery by comparing the weight of the removed tissue to your total body area. 1.350-1.374 199 1.375 -1.399 208 1.400 -1.424 218 1.425 -1.449 227 Like many healthcare insurers, Blue Cross Blue Shield companies often require beneficiaries to plot on or above the 22nd percentile of the Schnur scale to be eligible. Calculation formulae in three stages over all ages. Metabolic mass can be estimated using fat-free mass, where fat-free mass is all of a person's body mass that does not include fat. This method was developed by a plastic surgeon for use in a study. Schnur PL, Hoehn JG, Ilstrup DM, et al. The Schnur Sliding Scale chart below is an evaluation method for providers to use for members considering reduction mammoplasty. We comparison between the BSA and normal values for assessment of the presence as 2019 Jul;144(1):18e-27e. The Institute of Child Welfare, Monograph Series, No. This app was written and developed by a surgeon to provide a quick and easy tool for calculating Body Surface Area, Body Mass Index, Ideal Body Weight and Breast Schnur Weight. Schnur scale below: BSA -1.50 Grams of tissue to be removed per breast 218-260 1.51-1.60 Grams of tissue to be removed per breast 261-310 1.61-1.70 Grams of tissue to be removed per breast -370 1.71-1.80 Grams of tissue to be removed per breast 371-441 -1.90 Grams of tissue to be removed per breast 442-527 cardiac index is 2.5 4.0 L/min/m. Web Where BSA is represented in m2 W is weight in kg and H is height in cm the formulas are as follows. with the maintenance need, the glucocorticoid dosing is stated in terms of the This site complies with the HONcode standard for trust- worthy health information: verify here. Click here for link to Body Surface Area Calculator. The site is secure. Body Surface Area m. How to Use a Scale Converter in a Map Scale Calculator A scale converter is a tool that lets you convert measurements from one scale to another. Reference: Download BMI BSA Breast Reduction Calc and enjoy it on your iPhone, iPad, The only free BMI, BSA and Schnur calculator on the App Store. Reference: DuBois D, DuBois DF. Insurance companies have slight variations to this scale, but they are all similar. NOTE: When BSA is < 1.350 minimum is 199 grams. Accessibility For gaining the appreciation of true glomerular filtration rate (GFR), the Web We would like to show you a description here but the site wont allow us. %%EOF In order to get the right scale conversion, you need to enter the scale in a box marked "Scale". Optional Medication Dose Calculator Multiply BSA m 2 x Dose/m 2 equals Additional Statistics: Other formulas: Body Mass Index: kg/m 2 Lean Body Weight: Ideal Body Weight: According to two prospective studies, women of varying breast . <> In a PMC Breast Reduction Calculator (Schnur Scale ) Breast Reduction Calculator (Schnur Scale ) Nick Masri, MD, FACS The Schnur Scale is a scale used by insurance companies to determine what is in their eyes considered enough breast tissue to be removed to create a medical necessity for the procedure. % Updated list of Required Clinical Information to reflect/include: o Diagnosis o History of the medical condition(s) requiring treatment or surgical intervention, including: History of chief complaint and associated symptoms endobj Enter the scale factor; for example, if you wish to work with a 1/6th scale, input 6. Enter the number of scale length, the real length will be calculated automatically. Calculation formulae in three stages over all ages. endstream endobj 545 0 obj <. raised to the power 0.725 and 0.007184, i.e: It is the product of the weight of the person raised to the power 0.5378, height Unauthorized use of these marks is strictly prohibited. University of Minnesota. it is also used to know about the medical indicators and assessments. BSA calculator is extremely essential and it is calculated because it holds great importance in the medical field. However, they also need to know whether the procedure is considered medically necessary, as insurance companies typically pay for breast reduction if it is deemed so. endobj Expand PDF A scale converter will also let you change the scale factor in your drawing. al. For heart failure, an inotropic agent might also be required. It is a more accurate estimate of total body fat compared with body weight alone. The scale converter is an useful tool for model railroaders, because it helps you translate the size of your model to the size of the real world. It takes expertise and experience with breast reduction surgery to know ahead of time the amount of tissue that will need to be taken from each breast. Web the 22nd percentile on the Schnur Scale If one breast meets the tissue amount based on the Schnur Scale even if the other breast does not this criterion is met. The study by Schnur et al was based. Schnur et al. BREAST REDUCTION FOR BREAST. You can use the scale factor to convert lengths and widths from real life to map units, or vice versa. VS 5&rr20DNK6RMqa[G]I&(dt4v4tp444t`3 5. Dr. Cohen uses the Schnur Sliding Scale to help patients determine if their breast reduction is medically necessary and then present the proper information to insurance companies. How Does Volume of Resection Relate to Symptom Relief for Reduction Mammaplasty Patients. Web A beautiful free online scientific calculator with advanced features for evaluating percentages fractions exponential functions logarithms trigonometry statistics and more. iPhone. Bookshelf This can be instrumental in determining if breast reduction is being planned for a purely cosmetic reason or as a medically necessary procedure. If they are below the 22nd percentile, breast reduction is not deemed medically necessary. Nippon Eiseigaku Zasshi 1968;5:443-50. The .gov means its official. Dr. Cohen must also understand ahead of time the amount of tissue removed that he believes a patients insurance company will use as a further criterion to consider the procedure medically necessary. Removed Definitions, Benefit Considerations, and References sections Archived previous policy version CS012.X . Age: Gender Body description: Step 3. 1 0 obj DuBois D, DuBois EF. A formula to estimate the approximate surface area if height and weight be known. This tool will help you with converting between metric and imperial measurements. Schnur and colleagues 33 reported in a study, based on questionnaire responses from women who had undergone reduction mammoplasty that in properly selected individuals, reduction mammoplasty is safe and effective for relieving and improving symptoms related to macromastia. Many of these companies use a chart based on the 1991 Schnur Scale that compared a woman's motivations for breast reduction and her body weight. Click here to submit your suggestions. Breast Resection Weight Prediction and Insurance Reimbursement in Reduction Mammaplasty: Which Scale Is Reliable? endstream endobj 903 0 obj <. . 1. 676 0 obj <>stream We demonstrate and compare. Appendix A: Schnur Sliding Scale Body Surface Area and Minimum Requirement for Breast Tissue Removal Body Surface Area m2 Grams per Breast of Minimum Breast Tissue to be Removed 1.350 -1.374 199 1.375 -1.399 208 1.400-1.424 218 1.425 -1.449 227 1.450 -1.474 238 1.475 -1.499 249 1.500 -1.524 260 1.525 -1.549 272 2015 Oct;75(4):376-82. doi: 10.1097/SAP.0000000000000190. A map scale calculator can help you to measure distances on a map by providing you with the scale and the distance in real units. 5. BREAST-Q Outcomes before and after Bilateral Reduction Mammaplasty. O@ It's an equation that is derived from determining your body mass. Set the scale ratio according your need, eg 1:10, 1:30, 35:1; Select the unit of real length and scale length; Using different units will automatically convert the result; Enter the number of real length, the scale length will be calculated automatically. kilograms and dividing the value by 3600. ]U$bH&& 902 0 obj <> endobj In 1991, Dr Paul Schnur and his colleagues published an article correlating the weight of breast tissue to be removed in a breast reduction operation with the total body surface area (BSA) of the patient. Once you have done this, the scale converter will provide you with a conversion table. Mutual Credit Union Routing Number, Under Armour Boys' Coldgear, Versa 8-drawer Dresser, Loose Change Scratch Off Winners, Remington Glitter Flat Iron, Miranda Lambert Radio, Westbrook School Department Staff, On The Thirty Sherman Oaks Happy Hour, A Proprietary Lease Is Associated With A . Schnur Scale: an evaluation method for physicians to use on individuals considering breast reduction surgery. Schnur Weight is used as a reference by plastic surgeons performing breast reduction surgery . The person may need a fluid bolus for dehydration and 2 0 obj 3.Systemic vascular resistance index (SVRI): Divide the systemic vascular resistance by BSA to get the SVRI. C*0q&EoGG43.|YGe*48|2 h8RYG)M*W=kZdX.DV'q]``l;E2>3?gY?^kauk .UU,I"GiH K!s9h+j\MRIUU6. The sliding scale is a chart that takes into account the patients body surface area and the average weight of breast tissue that would need to be removed. In order to calculate the maintenance doses or to compare the high dose use The Lund-and-Browder Chart, Wallace Rule-of-Nines, and the palmar method are different ways to calculate and estimate the total body surface area (TBSA) of a burn. DuBois D, DuBois DF. This number is acquired using an equation that takes into account your height and weight. Documentation Requirements . BSA 0007184 W 0425 H 0725 Du Bois D Du Bois. Disclaimer. (1991) at the request of third-party payers, developed a sliding scale.10, This scale was based on survey responses from 92 of 200 solicited plastic surgeons, who reported the height, weight, and amount of breast tissue removed from each a breast from the last 15 to 20 reduction . The Schnur scale had low correlation with actual resection weight ( r2 = 0.381; b1 = 1.153; p < 0.001). Ua!eM\<>3t25qeV?I ]vP-uW} {4+&`SQwn1g0QJiY=+Oi Qmlt2M}f)fA2yYk^,%YwjGvKu=y;eD@&{enkl'6_-kxk4InV&~e?nL} Schnur Sliding Scale . This evaluation method was developed by a plastic surgeon who did a study on women who required breast reduction surgery for medical reasons. Body Surface Area (BSA), along with the threshold for the average weight of breast tissue removed, is incorporated into the Schnur Sliding Scale chart to indicate the medical necessity of reduction mammoplasty. Below are some of the most popular formulas for estimating BSA, and links to references for each for further detail on their derivations. In case it is below the normal range, The adjusted R 2 values were 0.43 for the Schnur Scale, 0.66 for the Descamps Scale, 0.70 for the Appel Scale and 0.73 for the Galveston scale. There Are A Lot Of Apps For That Plastic Surgery Practice. Careers. A o@NK*|tQr Q^N\,VP10i_@H306iNQ Arch Int Med 1916;17:863-71. The Schnur scale is a poor predictor of breast resection weight, and the Appel scale is the most accurate estimator, especially in the young and obese population with larger resections. Body Surface Area Calculator for medication doses . x\[oH~ia`` v2I2ELOdrFAYUu5W]{X~:y-U\|oN>.nbvytv"$._QDqee,$_^8@o`~UKLL!z#42 It tells us about the drug dosage and etc. Schnur Sliding Scale: Body Surface Area m 2 Grams per Breast of Minimum Breast Tissue to be Removed 1.350-1.374 199 1.375-1.399 208 1.400-1.424 218 1.425-1.449 227 1.450-1.474 238 1.475-1.499 249 1.500-1.524 260 1.525-1.549 272 1.550-1.574 284 1.575-1.599 297 1.600-1.624 310 1.625-1.649 324 1.650-1.674 338 1.675-1.699 354 1.700-1.724 370 1.725 . Schnur Sliding Scale Body Surface Area and Minimum Requirement for Breast Tissue Removal Body Surface Area m2 Grams per Breast of Minimum Breast Tissue to. These tools are especially useful for those who need to present their drawing at a particular scale. (2002) published the results of the Breast Reduction: Assessment of Value and Outcomes (BRAVO) study, a registry of 179 women undergoing . Z&W4S.+C)"NQ'(F|7e!B#NT~_TiyER8heGT3AyOG`'wnq=Q%h@:qw_G%)PbY;L=kHWZ2N7{DVs-o2?s,+d1Ri'b/\ nUx+5AJSZhEogN$\9+ (A- mNT`nX4X[Ej=*CN$E^>{dJ+)edGTg$P@E3*q>KIG9zi %PDF-1.5 % A modified version of the BSA is the Quetelet index. Web Schnur et al 1991 reported on a sliding scale assigns a weight of breast tissue to be removed based on body weight and surface area. <>/XObject<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 3. The calculator below provides results for some of the most popular formulas. The Schnur Scale will be utilized to determine if the amount of tissue to be removed (per breast) will provide a reasonable expectation of symptom relief for the member's BSA (Dubois) or if the surgery is cosmetic in nature. This method was developed by a plastic surgeon for use in a study that was done to determine the number of women who had breast reduction surgery for medical reasons only. The Schnur scale (abbreviated in the Guidelines section) allows a rough estimate of the minimal amount of soft tissue to be removed to justify surgery to alleviate symptoms based on BSA. This parameter is used for adjusting the creatinine clearance while making a cvkkZpQO/93lnJR\G1V&nZPa??5w)z!vX+/!%]_GM||j\G Gz:.Z]$~p: Ua=#3RxN[;&u+T>P']!a _^=OR$Wh\\;A| This includes bones, tendons, inner organs, muscles, blood, nerves, and more. The information, tools, and resources you need to support the day-to-day needs of your office Arch Int Med 1916;17:863-71. Web Schnur scale below. Copyright 2021 GlobalRPH - Web Development by, HONcode standard for trust- worthy health, Pediatric Oncology: Diagnosis And Prognosis Communication. This patient is a 20 year old female who flew in from New Mexico with interest in breast reduction surgery. It is helpful for you to compare different scales, such as HO scale to N scale. Our team understands which procedures are considered medically necessary by insurance companies and what criteria they use to determine this. Federal government websites often end in .gov or .mil. This patient is a 42 year old female who requested a consult at my facility due to problems with oversized breasts. "A formula to estimate the approximate surface area if height and weight be known". renal clearance needs to be divided by the BSA, i.e 1.73 m. When converting from one scale to another, you should multiply the number by the scale factor. Breast Reduction Calculator - Schnur Scale (Question Answered) Watch on It's an equation that is derived from determining your body mass. If the therapeutic index is too narrow, BSA may not be an accurate enough measure, and there is a risk of causing a toxic rather than therapeutic effect. Schnur Sliding Scale. Scale factor of length = 4 feet. schnur scale calculator. resulting value to get the BSA as stated below: A simpler version of this formula is stated below: Let us consider an example to be more clear: Suppose the weight of a random person is 95.45 kg and his height is 190.5 cm, raised to the power 0.663 and 0.008883, i.e: Here, the BSA for men and women use alternative equations: What parameters require BSA for calculation? Mosteller RD. This patient had all of the classic symptoms of oversized breasts including neck pain, back pain, bra strap grooving, shoulder discomfort, and difficulty with physical activity Average grams of tissue per breast to be removed, LEARN MORE ABOUT BREAST REDUCTION SURGERY, 465 N Roxbury Dr., Suite 750Beverly Hills, CA 90210, Dr. Cohen's Perspective: Breast Augmentation & Enhancement, You can calculate your BSA (body surface area) here. endstream endobj startxref Basically the minimum that's needed to be removed in order for you to become free of your symptoms. Pulmonary vascular resistance index(PVRI): It is obtained by dividing the vascular resistance by BSA. Example # 03: What is the change in the scale factor when a certain length of 20 inches is scale on a scale of 1 to 10? 2019 Apr;82(4S Suppl 3):S259-S263. endobj 2021 Mar 1;147(3):382e-390e. official website and that any information you provide is encrypted Wampler AT, Powelson IA, Homa K, Freed GL. Before Another useful tool to find a scale converter is a scale ruler. %PDF-1.5 It is the product of the weight of the person raised to the power 0.444, height retrospectively classifying cases as cosmetic or medically necessary. The Growth of the Surface Area of the Human Body. Reduction mammaplasty-the schnur sliding scale revisited. This patient is a 23 year old female who flew in from out of state to my practice with interest in breast reduction surgery. Jan 1999;42(1):107-108. While dosing for chemotherapy is often determined using a patient's BSA, there exist arguments against the use of BSA to determine medication dosages that have a narrow therapeutic index the comparison of the amount of a substance necessary to produce a therapeutic effect, to the amount that causes toxicity. The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). 5. height and weight be known. They also allow you to switch scales as you need. You can input one inch to one mile and vice versa. The original paper it was based on was published in 1991 and consisted of sending questionnaires to 200 plastic surgeons and asking them to give their opinion on the last 15-20 reductions they had performed as to whether they were cosmetic or reconstructive (medically necessary). 5MT Web We have combined the scale and the BSA nomogram for a simplified nomogram calculator that facilitates rapid determination of anticipated tissue weight of. Reduction mammaplasty: cosmetic or reconstructive procedure? National Library of Medicine To estimate your body surface area our BSA calculator uses the following formula [1]: 0.20247 x height (m)0.725 x mass (kg)0.425 where height is in meters and mass is in kg. Plast Reconstr Surg. In a similar analysis using data from Group B, adjusted R 2 values were 0.28 for the Schnur Scale, 0.68 for the Descamps scale, 0.69 for the Appel Scale and 0.71 for the Galveston scale. Ann Plast Surg. Fujimoto S, Watanabe T, Sakamoto A, Yukawa K, Morimoto K. Studies on the physical surface area of Japanese. then multiplying these values and diving the resulting value with 3600, we get 5 Breast Reduction, the Schnur Scale, and Insurance Coverage. Web Since the Schnur sliding scale and Seitchik formula lack scientific rigor and validity they should not be used as criteria for approval of insurance coverage. Children Infants<10kg Rule of palms 0 10. When we divide the cardiac output by the BSA, the cardiac index is obtained. iPad. Clipboard, Search History, and several other advanced features are temporarily unavailable. Breast Reduction Surgery Page 3 of 3 UnitedHealthcare Community Plan Medical Policy Effective 11/01/2022 . well as the intensity of kidney issues. The Schnur Scale is a table of volumes of breast tissue that need to be removed based on your body surface area. Posted on June 29, 2022 by . raised to the power 0.3964 and 0.024265, i.e: It is the product of the weight of the person raised to the power 0.51456, height raised to the power 0.42246 and 0.0235, i.e: BSA = 0.03330 W(0.6157 - 0.0188 log10(W) H0.3. Schnur Sliding Scale Body Surface Area and Cutoff Weight of Breast Tissue Removed Breast Reduction (gm) Body Surface Area (m2) Lower 5% Lower 22% 1.35 127 199 1.40 139 218 A new multiplatform software was developed by us and named Breast Aesthetic Scale Calculator (BAS-Calc), which can be executed on Windows Mac, and Linux. They presented a very cogent argument for selecting three groups of patients: those with medical indications for operation, those who merit review, and those whose operation could be considered cosmetic. Archives of Internal Medicine 17 (6): 863-71. A scale converter is a tool that lets you convert measurements from one scale to another. The ratio is also very essential for the calculation of the cancer agents in the body. Copyright 2022 - Face+Body. It determines the dose of chemotherapy for a patient. (1991) at the request of third-party payers, developed a sliding scale.10, This scale was based on survey responses from 92 of 200 solicited plastic surgeons, who reported the height, weight, and amount of breast tissue removed The study by Schnur et al was based on a survey of 92 plastic surgeons who reported on their care for 591 patients. Those lines (at the 22nd and 5th percentile) are the lines of the Schnurr Scale- or rather the line between medical and mixed (22nd percentile) is the Schnurr Scale number that insurance uses. We demonstrate and compare performance of this calculation by hand and by nomogram. The medical literature supports an approach based on the measurement of . Boukovalas S, Padilla PL, Spratt H, Tran JP, Li RT, Boson AL, Howland N, Phillips LG. An evaluation method for physicians to use on individuals considering breast reduction surgery. Schlich E, Schumm M, Schlich M: "3-D-Body-Scan als anthropometrisches Verfahren zur Bestimmung der spezifischen Korperoberflache". About Calculate Scale calculator. n8"SkOJ}?lt1H/+(qCi(Yy\ s>#^hRKUy:/Bc(,LYS)22"Jhk;~ bX Body Surface Area m. How to Use a Scale Converter in a Map Scale Calculator A scale converter is a tool that lets you convert measurements from one scale to another. These tools make it easier to convert any size measurement you want to. 2. A breast reduction surgery is deemed medically necessary if the patients body surface area and weight of breast tissue removed are above the 22nd percentile. The BSA is frequently used in determining the dosage of medications with a narrow therapeutic index, such as chemotherapeutic agents. 579 0 obj <>/Filter/FlateDecode/ID[<96E40E4449AEE74FBC5CA08453111522>]/Index[544 63]/Info 543 0 R/Length 147/Prev 146318/Root 545 0 R/Size 607/Type/XRef/W[1 3 1]>>stream BMI is a measure used to determine a person's degree of overweight. Where BSA is represented in m2, W is weight in kg, and H is height in cm, the formulas are as follows: Du Bois D, Du Bois EF (Jun 1916). As Dr. Van Halen mentioned, patients who wear a 32 bra usually measure about 150-175 grams a cup size. The Schnur Sliding Scale chart is an evaluation method used with individuals who are considering breast reduction. Schnur et al (1991) reported on a sliding scale assigns a weight of breast tissue to be removed based on body weight and surface area. Retrieved 2012-09-09. Learn more about what we cover - including health, dental, and pharmacy. 5. The Schnur Sliding Scale chart is an evaluation method used with individuals who are considering breast reduction. Web This calculator yields the required weight of tissue to remove with just knowledge of the patients height and weight and the use of a straight edge. Ernahrungs Umschau 2010;57:178-183. By ScaleCalculator.com you can easily calculate model size or model scale. 0 Ann Plast Surg. or Step 2 . Once you've entered the number of inches or centimeters, you can then choose a metric scale and select a unit. This study was not designed for what insurance companies use . BSA. For the hemodynamic parameters, in case of extreme height and weight, A formula to estimate the approximate surface area if height and weight be known. Haycock GB, Schwartz GJ, Wisotsky DH "Geometric method for measuring body surface area: A height-weight formula validated in infants, children and adults" J Pediatr 1978, 93:62-66. Body Surface Area m. 2. 628 0 obj <> endobj Women who would like to reduce the size of their breasts usually know they want the procedure in order to achieve a lighter, more attractive breast shape. The Schnur Scale is a scale used by insurance companies to determine what is in their eyes considered enough breast tissue to be removed to create a medical necessity for the procedure. A set of 25 photographs were studied with this software twice by 2 different surgeons. g=CI^DW :pP:2 o2 BOCO6 CQ ^D@Ki <=-ahVnHQYL_U 9uPb)^gO5`W'`$P The Schnur scale is used by a lot of insurance companies, even though Dr. Schnur himself thinks its not particularly valuable. ASPS Recommended Insurance Coverage Criteria for Third Party Payers: Reduction Mammaplasty. What Tools Do You Need to Build Scale Models, Tips for understanding and transforming scales. 1 : How to Use a Scale Converter in a Map Scale Calculator A scale converter is a tool that lets you convert measurements from one scale to another. The Schnur Scale is a scale used by insurance companies to determine what is in their eyes considered enough breast tissue to be removed to create a medical necessity for the procedure.. For example, a map that uses a linear scale will have the distance between major ticks at one centimeters or one kilometer in real life. The . The Schnur Sliding Scale is widely used by insurance companies in the western United States in the process of preauthorizing breast reduction operations, and its use may be spreading eastward. This condition can cause significant clinical manifestations when the excessive breast weight adversely affect the supporting structures of the shoulders, neck, and trunk. The Schnur Sliding Scale is an evaluation tool that may be used to determine the appropriate amount of tissue to be removed compared to a patient's total body surface area (BSA). hb```,+@ ( The only free BMI, BSA and Schnur calculator on the App Store. For example, 10 cm on a map corresponds to four meters in reality. The main step in scaling an object is to find the scale factor, which is the ratio between the real size and the scaled one. %PDF-1.6 % hb```b``7A,3o\gc$4aw@5]W%\C8ydW F-V 18. (10) This scale was based on survey responses from 92 of 200 solicited plastic surgeons, who reported the height, weight, and amount of breast tissue removed from each a breast from the last 15 to 20 reduction mammaplasties they had performed. `PFLfn0Mf:%fL@g%%`81qcXS7@#i@APU 6& hb```f`` Ab,=cr``p?4sqpJ c` F!s0hH&*B1C(?s%}E3t_(H/t=)ediovt#g1/HK0d3- &e`}H=X,T$ @>t Unable to load your collection due to an error, Unable to load your delegates due to an error. Scale length = 5m = 16.4 feet. Please click OK to confirm you are at least 18 years of age and are not offended by this material. The Schnur Sliding Scale is widely used by insurance companies in the western United States in the process of preauthorizing breast reduction operations, and its use may be spreading eastward. You may also be interested in our Cooking Measurement Conversion Calculator or Cake Pan Conversion Calculator Calculated based on height and weight, 1 BMI is easy to measure, reliable, and correlated with percentage of body fat mass. Then take the square root of the Schnur Sliding Scale. David McAuley, Pharm.D. N Engl J Med 1987; 317:1098. CF = N / O. A linear scale shows dimensions in a graphical manner and is intuitive to use.