Multiplier
Free App
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About Multiplier
The Multiplier App automates calculations to predict mature height and bone length in children. This method was created originally in Baltimore at the University of Maryland, and subsequently developed at the International Center for Limb Lengthening (ICLL), Rubin Institute for Advanced Orthopedics (RIAO), Sinai Hospital of Baltimore.
We have taught the Multiplier Method for more than 10 years at our annual Baltimore Limb Deformity Course (www.DeformityCourse.com). These calculations are typically performed by hand, using various formulas. Certain calculations are easy, but others involve more complicated formulas. Utilizing this App will reduce the time needed for these routine calculations, and decrease errors. You need only input the values about a patient (sex, age, length) and the App will execute the required Multiplier formula.
The Multiplier App will allow you to make the following calculations:
Lower Extremity
• Limb Length Discrepancy (LLD) (Congenital)
• LLD (Developmental)
• Growth Remaining
• Bone Length
• Timing of Angular Correction
• Timing of Epiphysiodesis
• Comprehensive (Congenital) Limb Length Discrepancy and Epiphysiodesis
Upper Extremity
• LLD (Congenital)
• LLD (Developmental)
• Growth Remaining
• Bone Length
Height and CDC Growth Charts
• Calculates height at maturity, calculates height at every age, and plots the patient’s height and weight on the CDC growth charts
Achondroplasia
• Height
• Sitting Height
• Leg Length
Fetus
• Length of tibia or femur at birth and maturity
Foot
• Foot Length
• Foot Length Discrepancy
Spine
• Sitting Height at Maturity
Bone Age: Elbow
• Shows a radiographic scoring system to determine skeletal age
Bone Age: Hand
• Shows you how to use radiographic criteria to determine skeletal age
Oblique Plane Deformity
• Calculates magnitude, orientation, and direction of an oblique plane deformity
Inclined Osteotomy Rotation Angle
• Calculates the rotational orientation and the vertical inclination of the osteotomy
This APP also provides the following additional resources:
Figures that show the standard measurements for the lower limb and foot, the multiplier formulae that the app uses to perform the calculations, tables that show the values that are used in the multiplier formulae, figures that show the development of the apophyses, epiphyses, and bones, a bibliography, and a user guide.
Disclaimer: No growth prediction method is 100% accurate; this App is not a substitute for sound and careful clinical judgment.
We have taught the Multiplier Method for more than 10 years at our annual Baltimore Limb Deformity Course (www.DeformityCourse.com). These calculations are typically performed by hand, using various formulas. Certain calculations are easy, but others involve more complicated formulas. Utilizing this App will reduce the time needed for these routine calculations, and decrease errors. You need only input the values about a patient (sex, age, length) and the App will execute the required Multiplier formula.
The Multiplier App will allow you to make the following calculations:
Lower Extremity
• Limb Length Discrepancy (LLD) (Congenital)
• LLD (Developmental)
• Growth Remaining
• Bone Length
• Timing of Angular Correction
• Timing of Epiphysiodesis
• Comprehensive (Congenital) Limb Length Discrepancy and Epiphysiodesis
Upper Extremity
• LLD (Congenital)
• LLD (Developmental)
• Growth Remaining
• Bone Length
Height and CDC Growth Charts
• Calculates height at maturity, calculates height at every age, and plots the patient’s height and weight on the CDC growth charts
Achondroplasia
• Height
• Sitting Height
• Leg Length
Fetus
• Length of tibia or femur at birth and maturity
Foot
• Foot Length
• Foot Length Discrepancy
Spine
• Sitting Height at Maturity
Bone Age: Elbow
• Shows a radiographic scoring system to determine skeletal age
Bone Age: Hand
• Shows you how to use radiographic criteria to determine skeletal age
Oblique Plane Deformity
• Calculates magnitude, orientation, and direction of an oblique plane deformity
Inclined Osteotomy Rotation Angle
• Calculates the rotational orientation and the vertical inclination of the osteotomy
This APP also provides the following additional resources:
Figures that show the standard measurements for the lower limb and foot, the multiplier formulae that the app uses to perform the calculations, tables that show the values that are used in the multiplier formulae, figures that show the development of the apophyses, epiphyses, and bones, a bibliography, and a user guide.
Disclaimer: No growth prediction method is 100% accurate; this App is not a substitute for sound and careful clinical judgment.
All Application Badges
Free
downl.
downl.
Android
4.0+
4.0+
Bug
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buster
Android app
App History & Updates
What's Changed
Fixed a bug that caused the app to crash on devices with OS 7.0.
Fixed a bug that caused the app to crash on devices with OS 7.0.
Version update Multiplier was updated to version 6.1
Version update Multiplier was updated to version 5.1
More downloads Multiplier reached 10 000 - 50 000 downloads
Version update Multiplier was updated to version 4.5
What are users saying about Multiplier
Q
by Q####:
by Q####:
Tubular app. Grill for every1 who wants to know their child's future height.
M
by M####:
by M####:
It said I would be 5"2 but I'm 5"9
W
by W####:
by W####:
Easy to use, clinically very helpful
N
by N####:
by N####:
Useful app for patient counseling. Easy to use and convenient
N
by N####:
by N####:
This app is great! It is easier than calculating everything on paper and a quick resource in clinic
N
by N####:
by N####:
Doesn't work . Needs updating.
N
by N####:
by N####:
Great
G
by G####:
by G####:
Was great until last android update. Needs urgent update so we'll be able to continue use it
Y
by Y####:
by Y####:
Very nice App. Unfortunately not any more working after Samsung Lollipop update on Samsung Galaxy S4. I would like to have it back again.... please work on it....Thanks
Y
by Y####:
by Y####:
My little niece likes it but will not work after lollipop update.
Y
by Y####:
by Y####:
great app! but after some software update it doesnt work at all pls rectify...for a nexus phone
J
by J####:
by J####:
It downloaded but will not open.
A
by A####:
by A####:
After updating to android 4.4.2 on my galaxy S4, it crashes every time I start it.
Q
by Q####:
by Q####:
Good app but takes up to much space
Q
by Q####:
by Q####:
Niceee app
U
by U####:
by U####:
Offers a good variety of useful tools that are very valuable for management of LLD. Predicting growth and timing of intervention with an easy to use app really facilitates patient care. Thank you for compiling this!
O
by O####:
by O####:
Bingo game high winnings
U
by U####:
by U####:
It won't work with Android 4.1.2. Please update. Was a very useful app while it worked.
B
by B####:
by B####:
Great application, very important for limb lengthening & deformity correction by controlled growth & many other practical applications.
Z
by Z####:
by Z####:
Very much indispensable.
Z
by Z####:
by Z####:
Wonderful
Z
by Z####:
by Z####:
This app is amazing for medical professionals who plan for limb deformities and provide surgical treatments.
Z
by Z####:
by Z####:
Excellent
Z
by Z####:
by Z####:
I really liked the design and functionality of this app, but had a few issues when I bought a new phone. I brought this to the attention of the developer and the problems were immediately fixed. It works beautifully now on my Samsung Galaxy Note II. This is a great app and improves my accuracy and efficiency.
Z
by Z####:
by Z####:
I have installed this app 3 different times, once I waited 2 months in between, and it installs but when I press any buttons it shuts down immediately. Droid 4 I am disappointed because I was excited to use it.
Z
by Z####:
by Z####:
Crashed when opened
K
by K####:
by K####:
Huh
N
by N####:
by N####:
Not working since android update. Otherwise was great. Please fix I'd possible
Z
by Z####:
by Z####:
Excellent design. Easy to use.
Z
by Z####:
by Z####:
This should relieve some worry for many parents,,lol,, works great on my RazrMaxx.
E
by E####:
by E####:
Great app but there are no images that pop up for the "additional resources" like.the standard lower limb measurements. Please fix!
Z
by Z####:
by Z####:
Great Job!
Z
by Z####:
by Z####:
Awesome Application for predicting future height and bone lengths .... Enjoyed lot -:)
Q
by Q####:
by Q####:
Great application for predicting bone length .... I enjoyed using this app...
Z
by Z####:
by Z####:
I'm 6', my husband is 6'4", and my children are in the 95 and 75 percentiles for height. This app predicted they would be 5'4" and 5'6" at maturity?!?!?! Uninstall.
V
by V####:
by V####:
After updating to android 4.3 on my galaxy S4, it crashes every time I start it.
G
by G####:
by G####:
Wont load. Crashed every time. Had to uninstall.
Z
by Z####:
by Z####:
I like it its ok
by Q####:
My app was updated today and it keeps crashing it was working fine before. The app was useful, but of no use now as I cannot get it to work anymore!