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Search Results: 1 - 10 of 149602 matches for " Riyaz H. Jinnah "
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Achieving Accurate Ligament Balancing Using Robotic-Assisted Unicompartmental Knee Arthroplasty
Johannes F. Plate,Ali Mofidi,Sandeep Mannava,Beth P. Smith,Jason E. Lang,Gary G. Poehling,Michael A. Conditt,Riyaz H. Jinnah
Advances in Orthopedics , 2013, DOI: 10.1155/2013/837167
Abstract: Unicompartmental knee arthroplasty (UKA) allows replacement of a single compartment in patients with limited disease. However, UKA is technically challenging and relies on accurate component positioning and restoration of natural knee kinematics. This study examined the accuracy of dynamic, real-time ligament balancing using a robotic-assisted UKA system. Surgical data obtained from the computer system were prospectively collected from 51 patients (52 knees) undergoing robotic-assisted medial UKA by a single surgeon. Dynamic ligament balancing of the knee was obtained under valgus stress prior to component implantation and then compared to final ligament balance with the components in place. Ligament balancing was accurate up to 0.53?mm compared to the preoperative plan, with 83% of cases within 1?mm at 0°, 30°, 60°, 90°, and 110° of flexion. Ligamentous laxity of ?mm at 30° of flexion was corrected successfully to ?mm ( ). Robotic-assisted UKA allows accurate and precise reproduction of a surgical balance plan using dynamic, real-time soft-tissue balancing to help restore natural knee kinematics, potentially improving implant survival and functional outcomes. 1. Introduction Unicompartmental knee arthroplasty (UKA) has seen resurgence in the past decade with approximately 51,300 cases performed in 2009 and an estimated growth of 32.5% annually [1–3]. Benefits of UKA compared to total knee arthroplasty include reduced blood loss, reduced perioperative morbidity, faster recovery, shorter rehabilitation, increased postoperative range of motion, and reduced surgical cost [4–9]. However, proper patient selection is vital and the procedure remains technically demanding as the minimally invasive procedure limits surgical exposure and impedes precise component alignment and fixation [3, 6, 10–14]. UKA failures have mainly been attributed to improper component alignment leading to altered knee biomechanics with accelerated polyethylene wear if deformity is undercorrected, disease progression in other compartments if overcorrected, and anterior knee pain [6, 8, 15–17]. UKA component position and alignment are intricately associated with soft-tissue balancing during this procedure. UKA allows for minimal disruption of the patient’s native anatomy and is intended to restore the normal height of the affected compartment to produce normal ligament tension during the flexion-extension cycle. The success of UKA relies on proper soft-tissue tensioning to obtain a balanced flexion-extension gap and varus-valgus stability [14]. While advances in surgical instrumentation
Naevus comedonicus affecting the palms
Riyaz Najeeba,Riyaz A
Indian Journal of Dermatology, Venereology and Leprology , 1998,
Abstract:
Erythematous polycyclic patches
Riyaz Najeeba,Riyaz A
Indian Journal of Dermatology, Venereology and Leprology , 2006,
Abstract:
Poland syndrome (anomaly) with congenital hemangioma: A new association
Riyaz Najeeba,Riyaz A
Indian Journal of Dermatology, Venereology and Leprology , 2006,
Abstract: Unilateral defect of pectoral muscle and ipsilateral syndactyly constitute Poland syndrome. Absence or hypoplasia of the breast and nipple, axillary hair loss and dermatoglyphic abnormalities have also been reported in this syndrome. The primary defect could be in the development of the proximal subclavian artery with early deficit of blood flow to the distal limb and the pectoral region, resulting in partial loss of tissue in those regions. However, the association of congenital hemangioma with Poland sequence has not been observed so far. Such an association is being reported here in a 1-year-old infant, second-born of nonconsanguineous parents, who also had polydactyly instead of the documented syndactyly.
De sanctis cacchione syndrome
Riyaz Najeeba,Riyaz A
Indian Journal of Dermatology, Venereology and Leprology , 1999,
Abstract: A case of de Sanctis Cacchine syndrome in a female infant is presented.
Goldenhar syndrome with unusual features
Riyaz A,Riyaz Najeeba
Indian Journal of Dermatology, Venereology and Leprology , 1999,
Abstract: We report two cases of Goldenhar syndrome in whom bilateral ocular and auricular changes were observed. One patient also had hypertelorism, macrophthalmia and bulbous nose.
Experimental and Numerical Investigation of Shock/Turbulence Interaction by Hot-wire Technique
Mohammad Ali Jinnah
International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies , 2012,
Abstract: In the present paper, an experimental investigation has been carried out to observe the amplification of turbulence intensity after shock/turbulence interaction by hot-wire technique. The hot wires are installed in the wake of turbulent grids to measure turbulence fluctuations before and after the reflected shock interaction with turbulence. It is observed that the turbulence fluctuations for less open area of the grid plate are higher than the turbulence fluctuations for more open area of the grid plate. For numerical computations, grid plate of 49.5 % open area is used. The average longitudinal velocity line obtained from experimental velocity data simulates with numerical results properly and in some places, 5-7 % deviations are observed with numerical results. All the simulation results indicate that the present code with turbulence model is working properly. The substantial amplification of pressure fluctuations obtained from experiment is observed after interaction. The dissipation rate of turbulent kinetic energy (TKE) and the levels of length scales are determined numerically. It is observed that the dissipation rate of TKE and the levels of length scales decrease after shock/turbulence interaction.
Castellani′s paint
Riyaz Najeeba
Indian Journal of Dermatology, Venereology and Leprology , 2004,
Abstract:
Approach To jaundice (CME)
Riyaz A
Indian Journal of Dermatology, Venereology and Leprology , 1997,
Abstract:
Comparative performance analysis of Thyristor and IGBT based induction motor soft starters
A Riyaz, A Iqbal, S Moinoddin, SK MoinAhmed, H Abu-Rub
International Journal of Engineering, Science and Technology , 2009,
Abstract: In this paper the performance of a split-phase motor and a three-phase induction motor drives for soft starting is evaluated. The paper systematically investigates and compares the characteristics of a variable voltage fed induction motor drive for two different types of soft starters; one based on IGBT and another based on Thyristor. Experimental validation is done using analogue circuit based system, developed in the laboratory. The novelty of the work lies in the development of simple and flexible models for simulation purpose and their experimental validation.
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