Sequential tendon ruptures in ochronosis: case report

Alkaptonuria is a rare autosomal recessive disorder characterised by the absence of homogentisic acid oxidase, due to deficiency of an enzyme that degrades HGA in the tyrosine degradation pathway. Homogentisic acid (HGA) and its metabolites accumulate in the connective tissues leading to dark pigmentation of connective tissue in patients with alkaptonuria. HGA deposits in connective tissue causes weakness of the tendon and subsequent rupture, especially the large tendons in the body. Only few cases are reported in the literature with multiple tendon rupture but many case reports are available with isolated rupture of tendons. We report on a patient with sequential tendon ruptures in a patient. The case is reported for its rarity

Investigation on Mechanical Properties of Aluminum 8011 Metal Matrix Compositewith Titanium Carbide Particulate Reinforcement

Aluminium metal matrix composites are the key material in engineering fields like aerospace, defense, automobiles and consumer goods. Aluminium matrix composite dominates the conventional materials due to its low economic rate, high wear resistance and strength to weight ratio. So, the present work considered Al 8011 alloy as the metal matrix and titanium carbide (TiC) particles as reinforced material for investigation. The composite was prepared by stir casting method. A digital pin on disc tester was used to measure the wear with EN32 steel disc as counter surface (72HRC) and cylindrical pin as the composite specimens. The present tests were conducted for various sliding velocity of 1,57 m/s, 2,62 m/s and 3,67 m/s. The normal load of 20 N, 40 N, 60 N and the filler content of 0%, 10%, 20% have been considered for the sliding distance of 1000, 3000 and 5000 m. The results of new composite show better wear resistance than matrix metal. The micro structural characterization of worn surface was investigated using De-wintor inverted trinocular metallurgical microscope. Prepared polished matrix shows the distribution of TiC particles in Al 8011 metal matrix based on the quantity added. The impact energy of the samples was found using Izod impact testing machine. Final results showed improved mechanical properties for Al 8011 with 7% TiC compared with other two samples

Extensor indicis proprius to extensor pollicis longus transfer in spontaneous rupture of extensor pollicis longus following non displaced fracture distal end radius

Exact incidence of extensor pollicis longus (EPL) ruptures following distal radius fracture is not known. Peculiarly it’s common in nondisplaced fracture of the distal radius with an incidence of EPL rupture of 0.2-5%. Cortical irregularities from distal radius fractures or osteophytes easily abrade the tendon, causing gradual attrition and ultimately rupture. Compromised blood supply is also related to EPL rupture which is supported by microcirculatory anatomic studies. We present a case of 49 year old female who presented with spontaneous rupture of the EPL following a nondisplaced fracture of the distal radius managed by extensor indicis proprius (EIP) transfer. EIP transfer gives promising outcome. Optimum tension of the tendon is crucial for good functional outcome. We recommend suturing the tendon with thumb in extension and wrist in neutral position for optimum tension of tendon to avoid extensor lag and to prevent loss of IP flexion

Challenges and outcome of total hip arthroplasty in patients with developmental dysplasia of the hip: a clinical series with a spectrum of disease manifestation and technical notes

Patients with developmental dysplasia of hip eventually lead on to secondary osteoarthritis in adulthood and may end up with total hip arthroplasty at a younger age. Because of the altered anatomy of dysplastic hips, total hip arthroplasty in these patients is a technically demanding procedure. Altered anatomy of the acetabulum and proximal femur together with leg length discrepancy pose challenges during total hip arthroplasty. Since the majority of the patients are in the younger age group, soft tissue balance is of great importance to maximise postoperative functional result and longevity of prosthesis. In this paper, we present a series of our patients with a spectrum of disease manifestation from mild to severe form and also discuss the associated challenges and the technical solutions and their outcome

Simple and effective method to protect from toxic fumes of methyl methacrylate (bone cement) in operation theatre

Methyl methacrylate is a monomer of acrylic resin widely used in a variety of medical, dental, and industrial applications. Its extensive use in surgery, particularly for arthroplasties, has often raised concerns regarding potential human toxicity for orthopaedic surgeons, surgical nurses, and other operating-room staff who are occupationally exposed to the compound

Design and Analysis of a 3-Wheleer Integrated Monocoque Chassis

In this project, the design and development of integrated chassis of three wheeler prototype vehicle chassis is done, to convert the three wheeler passenger vehicle chassis into a load carrier chassis with the aim of reducing the tooling cost and increasing the rate of production. For this, The analysis is carried out by using Finite Element Analysis (FEA). The parameters checked in the analysis are the displacement of the chassis structure and stresses under static condition. The modeling of new chassis is done by using PRO-E and FEA by using ANSYS. Specifications of materials selection become a priority in order to construct the new chassis, based on the results of FEA we selected CRS-D grade (Cold Rolled Steel) of thickness 1.6mm. The best design with minimum self-weight, maximum load capacity and minimum deflection under static loading was then identified based on the results obtained through FEA

Ketorolac eye drop induced allergic wheal and chemosis

Ketorolac is a non-steroidal anti-inflammatory drug which is prescribed rampantly in the treatment of seasonal allergic conjunctivitis due to its clinical efficacy of providing rapid relief from symptoms of allergy. There is a potential for cross sensitivity to aspirin. Hence, a leading question on aspirin allergy must be taken before prescribing the drug ketorolac

Generators for vector bundles on generic hypersurfaces

We prove that on a generic hypersurface in Pm+1 of dimension at least 3, a vector bundle with r ≤ m generators must be split if m is odd. If m is even, then the same is true if the degree of X is at least 3