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April 15-16, 2019 | Milan, Italy
OF EXCELLENCE
IN INTERNATIONAL
MEETINGS
alliedacademies.comYEARS
Ortho Congress 2019
Journal of Orthopedic Surgery and Rehabilitation | ISSN: 2630-4473 | Volume 3
ORTHOPEDICS, RHEUMATOLOGY
AND OSTEOPOROSIS
2
nd
Annual Conference on
PROOF OF CONCEPT TESTING OF INTELLIGENT FEMORAL HIP STEM
Ali Bakhsh, Lukas J Martin
and
Anki N H Bellow
Imperial College London, UK
P
eriprosthetic infections in hip arthroplasty are a feared complication with poor mortality and morbidity
outcomes. Patients often present after the onset of clinical signs, by which time periprosthetic infection
is extensive and biofilm formation has occurred. The aim of this study is to enhance earlier recognition of
periprosthetic infection so antibiotic therapy is more likely to be effective. A femoral stem with surface pH
and temperature sensors with the ability for wireless powering and data transfer was manufactured using
micro-electro mechanical circuits and additive manufacturing methods. This stem was tested pre-clinically for
proof-of-concept. The Author implanted this stem in cadaveric sheep leg. The sheep leg was warmed to physio-
logical temperature and tissue pH and temperature was altered within biologically relevant ranges (pH 6.0-8.0,
temperature 36-45°C) at 0.2 numerical intervals. The sensors reported pH recording with accuracy of 0.001pH
and temperature recording accuracy of 0.2°C. The implant was tested in three sheep legs. Between the three
trials, there was no statistical difference in pH or temperature recordings (pH, CI-2.44 to 5.11, P = 0.788. Temp,
CI-4.23 to 2.90, P=0.233). Safety factors such as electric current leakage and technical uncertainties such as
long-term powering reliability are unknown. In this study, the author proves the concept of the first reported
dual pH and temperature sensing hip prosthesis.
J ortho Rehab Surg. 2019, Volume 3 | DOI: 10.4066/2630-4473-C1-003