Precision, Variability, and Accuracy of Femoral Varus Measurement

Alexander C. Robb

Cummings School of Veterinary Medicine at Tufts University

Precision, Variability, and Accuracy of Femoral Varus Measurement Using Radiographic and Computed Tomographic Imaging in Clinically Abnormal Femora

INTRODUCTION:  Many skeletal abnormalities have been associated with medial patellar luxation (MPL), and recent focus has centered on femoral malalignment, specifically excessive femoral varus, quantified by measurement of the anatomic lateral distal femoral angle (aLDFA).1,2  In cases with excessive varus, a distal femoral osteotomy can be performed; however, this invasive procedure requires accurate measurement of aLDFA.  Recent studies have reported conflicting evidence regarding the ability to measure distal femoral varus in clinically normal bones using both radiographic and computed tomographic (CT) methods.1,3  The purpose of this study was to establish the precision, variability, and accuracy of aLDFA measurement using radiographic and CT imaging, compared to the reference standard of digital photographs of anatomic specimens, in clinically abnormal femora.  Our hypothesis was that CT would be more precise, less variable, and more accurate than radiographs for aLDFA measurement.

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Laica

Alexander Robb, V’13
Tufts University
Cummings School of Veterinary Medicine
Experiences

I never would have guessed that scrambling eggs would be an important moment in the course my veterinary education.  This summer, such a seemingly mundane act took on a much larger significance.  For a week in July, I traveled to San Juan del Sur, Nicaragua with WorldVets to participate in a small animal spay/neuter campaign.  San Juan del Sur is a beautiful coastal town with many nice shops and restaurants lining the beach,remarkably friendly people, and an unfortunately limited supply of regular veterinary care.  Our group of veterinarians, veterinary students, technicians, and volunteers spent a week in town, with three days totally dedicated to clinical procedures.  We spayed, neutered, enucleated, drained abscesses, repaired wounds, did healthy consultations, and administered medication for over 400 animals in that short period of time.  For some in our group, the highlight of the trip was their first spay, for others it was treating a crocodile with a wound or a monkey with a urinary tract infection.  For me, it was one dog in particular. Laica in her body suit Her name is Laica, and the fact that I can still use “is” to describe her, is amazing.

Laica came into our clinic on the second day for a routine spay.  I wasn’t involved in her surgery, but there weren’t any complications that we were aware of while she was under our supervision and care.  Once ready to go home, she was discharged to her owners with instructions to keep her inside for the next day and keep a close eye on her as she recovered.

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Native American Project HSVMA Stipend

By: Amy Vlazny

Tufts Cummings School of Veterinary Medicine, Class of 2011

Through the windows of the car winding through the mountains north of Elko, Nevada, the landscape grew increasingly desolate.  Without a tree or building to give it form the valley seemed starkly flat, and the mountains, tipped with snow, jutted up suddenly in the distance.  The sandy ground was dusted with light snow and sparsely covered with drab sagebrush – the Nevada state flower.  The setting seemed as exotic as the high páramo of the Andes, the dry, frosty grasslands found at altitudes higher than trees can grow.  But, no; I was only in my country's very own snowy mountain desert.

            I was taking this adventure into an area of the U.S. formerly unknown to me in order to participate in an HSVMA Field Services spay/neuter clinic at the Duck Valley Indian Reservation.  I was one of 25 veterinary students who, along with eight veterinarians and ten technicians, volunteers and staff, were now rolling into the town of Owyhee in a ten-car caravan behind a truck and trailer full of veterinary equipment, intending to spay, neuter, and vaccinate just about any dog or cat that would come through the gymnasium doors over the next four days.  They were four hectic and exhausting days, but the enthusiasm of the volunteers and the appreciation of our clients made for a rich learning experience and countless enjoyable interactions.   

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