A rare case: exostosis of right foot

Exostosis is benign tumor. Osteochondromas are benign metaphyseal osseous growths occurring in long bones of body.  They contain cartilaginous cap which are present before closure of physis plate. Growth of these structures ends with physis fusion. Being benign in nature, they don’t require any surgery. Unless and until they cause compression symptoms on nerves and blood vessels, difficulty in movements of joints, and patients request for cosmetic appearance. Here by we present a rare case of 19 years old male patient with right foot exostosis. The same patient has multiple Exostosis in bilateral ankle, knee and humerus but without any family history. Exostosis was found on plantar aspect of foot, which made it difficult for him to walk. Surgical excision was done. Pre, per and post-operative period was fine. Patient was able to walk normally thereafter. There was no recurrence of growth thereafter

Functional outcome evaluation of distal humerus fracture fixation

Background: Distal humerus fracture are complex, difficult to reduce and fix, cumbersome post-operative mobilization, and yet functional outcome is doubtful. Though various treatment modalities available for past many decades ranging from conservative management, K wire fixation to plate and screws, but still treatment remains difficult. The objective of the study was to assess functional outcome of operative fixation of distal humerus with locking plate and screws.Methods: Prospective study was done in during November 2015 to June 2016 in Vydehi Institute of Medical Sciences and Research Centre, Bengaluru. Patients with distal humerus fractures who were admitted into hospital for operative treatment after fulfilling inclusion and exclusion criteria were included into study. They were followed up to 6 months post-operatively. Functional outcome evaluation was done with Mayo’s elbow performance score.Results: 30 patients were included into study with full data. We had excellent, good, fair and poor outcome in 17, 8, 3, 2 patients respectively. Except for infection in one, elbow stiffness in two and non-union in two patients, we had no other complications.Conclusions: Management of distal humerus fractures with preoperative evaluation, pre-operative planning, use of locking plate and screws, early mobilization can result in good functional outcome

Proximal femur fractures - effect of preoperative mental status of patients on postoperative mobility of patients

Background: In the elderly population, proximal femur fractures are most common which can result in increase of morbidity and mortality. Pre and postoperative mobility patterns, also depends upon the Mental Status of the patient. Incidence of Mental health disorders of patient can increases with age and co morbidities. The aim of the study was to evaluate the effect and relationship of preoperative mental status, on postoperative mobility in proximal femur fracture patients. On null hypothesis; there exists no co-relation between pre-operative mental status on pre and postoperative mobility those had surgery for proximal femur fractures.Methods: This is a retrospective study, carried out during the period of 14th March, 2016 to 14th March, 2017 at BIRRD (T) Hospital. All the patients who underwent proximal femur fracture surgeries were included in the study. Patients were evaluated for Abbreviated Mental Score Test pre-operatively. Mobility patterns were before injury and after surgery evaluated in patients with proximal femur fractures. Postoperatively patients were followed up to one year.Results: 50 patients were included into the study, where 12 patients could not present to follow-up due to various reasons, thus we have complete data of 38 patients. There is significant reduction in mobility status of individuals i.e. from 6.18 (preoperative pre fracture mobility) to 5.36 (postoperative mobility). Average abbreviated mental test score is 7.55. There exists a correlation between the variables.Conclusions: Null hypothesis remains rejected. There is statistically significant relationship between the variables (pre and postoperative mobility, and abbreviated mental test score), which appears to be positive correlation

The incidence of symptomatic deep vein thrombosis and pulmonary embolism, following THA in patients, with postoperative chemoprophylaxis in Indian population

Background: Deep vein thrombosis (DVT) and pulmonary embolism (PE) can occur in patients after elective total hip arthroplasties (THA). Indian population appears to have low incidence of DVT and PE in comparison with Western population due to difference in ethnicity, genetic make-up, social life styles. The study intends to find the incidence of symptomatic DVT and PE in postoperative THA patients. The aim of the study was to study the incidence of symptomatic DVT and PE, in post-THA patients in Indian Population.Methods: Retrospective study conducted from 1st January, 2017 to 31st July, 2018 in BIRRD (T) Hospital. All patients who underwent THA are included, after fulfilling inclusion and exclusion criteria. Patients were evaluated for symptoms during the hospital stay and after discharge for 3 Months.Results: Total number of patients who had THA were 447 (n=447). The symptomatic DVT was found in 1 (n=1) patient. He developed DVT (n=1) during the study period, in first 48 hours postoperatively and recovered with ICU management. The same patient showed symptoms of PE but recovered fully. All patients were on a prophylactic regimen.Conclusions: Our results suggest incidence of DVT and PE are low in the Indian population with a prophylactic regimen

Experimental understanding on the dynamics of micro-explosion and puffing in ternary emulsion droplets

Dynamics of puffing and micro-explosion phenomena occurring in ternary fuel emulsion droplets under high temperature environment were explored using high speed backlight imaging technique. A single droplet composed of diesel-biodiesel-ethanol emulsion was placed at the tip of a 75 µm gauge thermocouple and introduced rapidly into a furnace maintained at 500 °C. Several interesting features such as oscillation of suspended droplets, physical transformations occurring within the droplet, vapour expulsion, puffing, micro-explosion, sheet formation, perforations, growth of perforations, sheet disintegration and rotation of secondary droplets were observed. High resolution image analysis revealed separation of emulsion components within the core of the suspended droplet, which appeared either as a single nucleus or multiple nuclei. Two distinct types of micro-explosion were identified. For droplets encountering a single nucleus at the core resulted in a stronger vapour expulsion followed by intense micro-explosion. For droplets having multiple nuclei at the core resulted in a weaker vapour expulsion and slower growth of droplet prior to micro-explosion. Both types of micro-explosion process resulted in a number of child droplets. For the case of strong vapour expulsion nearly 80% of its child droplets have their sizes distributed within 150 μm compared to 60% for weaker vapour expulsion. The child droplets that were generated from the primary events of both puffing and micro-explosion cascaded further into secondary and tertiary events of puffing and micro-explosion in freely suspended environment.EPSR

Combustion of Ligaments and Droplets Expelled after the End of Injection in a Multi-hole Diesel Injector

Experimental investigations were carried out to study the end of injection spray characteristics using a number of production grade multi-hole common-rail injectors. These injectors were taken from light-duty diesel vehicles that are currently in operation on the UK roads and have done different mileages. All the production injectors suffered expulsions of ligaments and droplets after the end of injection(aeoi). It is shown that injector age/mileage has very little effect on the amount of ligaments and droplets ejected from production injectors compared to injection-to-injection variations in the amount of post-injection expulsions. Brand new production injectors also show the presence of these post-injection expulsions after every injection, which is not a desired feature of the modern solenoid actuated common-rail fuel injection system. Subsequent combustion of these post-injection ligaments and droplets lasted up to 25ms after the end of fuel injection in our high pressure, high temperature experiments, and this would contribute to engine-out soot and unburned hydrocarbon (ubhc) emissions in a firing engine.This work has been sponsored by shell Global Solutions (UK) and EPSRC

Insights into Near Nozzle Spray Evolution, Ignition and Air/Flame 2 Entrainment in High Pressure Spray Flames

Engineering and Physical Sciences Research Council (EPSRC

AN EXPERIMENTAL STUDY ON EFFERVESCENT ATOMIZATION OF BIO-OIL FUELS

This paper presents the work on detailed characterization of effervescent spray of Jatropha and Pongamia pure plant oils. The spray characteristics of these biofuels are compared with those of diesel. Both macroscopic and microscopic spray characteristics at different injection pressures and gas-to-liquid ratio (GLR) have been studied. The particle/droplet imaging analysis (PDIA) technique along with direct imaging methods are used for the purpose of spray characterization. Due to their higher viscosity, pure plant oils showed poor atomization compared to diesel and a blend of diesel and pure plant oil at a given GLR. Pure plant oil sprays showed a lower spray cone angle when compared to diesel and blends at lower GLRs. However, the difference is not significant at higher GLRs. Droplet size measurements at 100 mm downstream of the exit orifice showed reduction in Sauter mean diameter (SMD) diameter with increase in GLR. A radial variation in the SMD is observed for the blend and pure plant oils. Pure oils showed a larger variation when compared to the blend. Spray unsteadiness has been characterized based on the image-to-image variation in the mean droplet diameter and fluctuations in the spray cone angle. Results showed that pure plant oil sprays are more unsteady at lower GLRs when compared to diesel and blend. A critical GLR is identified at which the spray becomes steady. The three regimes of spray operation, namely ``steady spray,'' ``pulsating spray,'' and ``spray and unbroken liquid jet'' are identified in the injection pressure-GLR parameter space for these pure plant oils. Two-phase flow imaging inside the exit orifice shows that for the pure plant oils, the flow is highly transient at low GLRs and the bubbly, slug, and annular two-phase flow regimes are all observed. However, at higher GLRs where the spray is steady, only the annular flow regime is observed

Experimental studies on air-assisted impinging jet atomization

In the present study, a novel air-assisted impinging jet atomization is demonstrated. A configuration in which a gas jet is directed on to the impinging point of two liquid jets is used to improve the atomization. The effect of liquid properties such as viscosity and surface tension, angle between liquid jets and gas injection orifice diameter on spray characteristics has been experimentally studied. Backlit imaging and particle/droplet imaging and analysis techniques are utilized to characterize the sprays. The experimental results indicate that the effect of liquid viscosity is significant on the liquid sheet break up formed by the impinging jets. However, surface tension does not affect the spray structure significantly in this mode of atomization. At low liquid jet velocity, the prompt mode of atomization is observed where as atomization occurs in classical mode at higher liquid jet velocity. Results showed that variation in the angle between liquid jets do not affect the breakup phenomenon significantly. The spray angle is computed by finding the angle between the lines joining the impinging point and spray edge at an axial distance of 15 mm downstream of the impinging point from the ensemble-averaged data over 100 spray images. It was observed that effect of liquid jets impinging angle on the spray angle is higher at higher liquid velocity. Higher viscosity liquids exhibit lower spray angles. Droplet size measurements indicate a radial variation in the spray. An overall Sauter Mean Diameter (SMD) value is obtained by combining the droplet statistics at all radial locations at a fixed axial location. A very interesting trend is that the SMD is constant beyond a critical Gas to Liquid Ratio (GLR) and momentum ratio for a large variation in liquid viscosity and surface tension. This observation has important ramifications for fuel flexible systems. (C) 2013 Elsevier Ltd. All rights reserved