scholarly journals Patterns of orthopaedic injury among hospitalised personal mobility device users and bicycle riders: a comparative study

2021 ◽  
Author(s):  
TSD Koh ◽  
YL Woo ◽  
TH Wong ◽  
MH Tan
Keyword(s):  
Orthopaedic Surgery ◽  
Surgical Intervention ◽  
High Energy ◽  
Open Fractures ◽  
Inpatient Stay ◽  
Injury Patterns ◽  
Prolonged Hospitalisation ◽  
Personal Mobility ◽  
Mobility Devices ◽  
Mobility Device

Introduction: Personal mobility devices (PMDs), such as electronic scooters or motorised bicycles, are efficient modes of transportation. Their recent popularity has also resulted in an increase in PMD-related injuries. We aimed to characterise and compare the nature of injuries sustained by PMD users and bicycle riders. Methods: This retrospective study compared injury patterns among PMD and bicycle users. 140 patients were admitted between November 2013 and September 2018. Parameters studied included patients’ demographics (e.g. age, gender and body mass index), type of PMD, nature of injury, surgical intervention required, duration of hospitalisation and time off work. Results: Of 140 patients, 46 (32.9%) patients required treatment at the department of orthopaedic surgery. 19 patients were PMD users while 27 were bicycle riders. 16 (84.2%) patients with PMD-related injuries were men. PMD users were significantly younger (mean age 45 ± 15 years) when compared to bicycle riders (mean age 56 ±17 years; p < 0.05). A quarter (n = 5, 26.3%) of PMD users sustained open fractures and over half (n = 10, 52.6%) required surgical intervention. Among 27 bicycle users, 7.4% (n = 2) of patients sustained open fractures and 70.4% (n = 19) required surgical intervention. Both groups had comparable inpatient stay duration and time off work. Conclusion: PMD-related orthopaedic traumas are high-energy injuries, with higher rates of open fractures, when compared to bicycle injuries. In addition, PMD users are significantly younger and of economically viable age. Prolonged hospitalisation and time off work have socioeconomic implications. Caution should be exercised when using PMDs.

scholarly journals Effects of Human Factors on Public Use of Standing-Type Personal Mobility Vehicle

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Naohisa Hashimoto ◽  
Kohji Tomita ◽  
Osamu Matsumoto ◽  
Ali Boyali
Keyword(s):  
Future Development ◽  
Real World ◽  
Public Transport ◽  
Urban Areas ◽  
Traffic Accidents ◽  
Transport Systems ◽  
Personal Mobility ◽  
Mobility Devices ◽  
Personal Mobility Vehicle ◽  
Mobility Device

To significantly reduce the occurrence of severe traffic accidents, reducing the number of vehicles in urban areas should be considered. Personal mobility is essential for realizing this reduction, which requires consideration of the last-/first-mile problem. The overall objective of our research is to solve this problem using standing-type personal mobility vehicles as transportation devices; however, to evaluate the feasibility of such vehicles as future mobility devices, it is necessary to evaluate their operation under real-world conditions. Therefore, in this study, experimental and survey data relating to the velocity, stability, safety, and comfort of a standing-type personal mobility device are obtained to evaluate its performance in three different scenarios. The results show that the personal mobility vehicle is socially well received and can be safely operated on sidewalks, irrespective of the gender or age of the driver; moreover, the results suggest that subjects who routinely use a bicycle are adept at avoiding and absorbing the impacts of small holes and bumps, thereby yielding reduced acceleration values (in all directions) and pitch, roll, and yaw rates. This is anticipated to benefit the future development of personal mobility devices and help realize effective and accessible public transport systems, as well as reduce the number of vehicles in urban areas.

scholarly journals Survey Data Analysis on Intention to Use Shared Mobility Services

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Eunjeong Ko ◽  
Hyungjoo Kim ◽  
Jinwoo Lee
Keyword(s):  
Intention To Use ◽  
Survey Period ◽  
Personal Mobility ◽  
Factors Affecting ◽  
Mobility Devices ◽  
Transportation Modes ◽  
Shared Mobility ◽  
Gyeonggi Province ◽  
Smart Mobility ◽  
Mobility Device

Shared mobility is a service that allows users to share various transportation modes and use them with reservations when necessary. It started with private automotive car-sharing and ride-sharing services. Currently, it operates on a wider range, including personal mobility devices such as electric bicycles and scooters. The purpose of this study is to derive a direction for providing future shared mobility services through analysis of factors affecting the usage intention of both current and prospective users. The survey targets 753 citizens living in Gyeonggi Province, Korea. The survey period is from February 12, 2020, to February 26, 2020. In this study, a logistic regression analysis is conducted to investigate the factors affecting the use intention of shared mobility. The analysis results show that gender, car ownership, and education, among variables reflecting socio-demographic characteristics, have significant effects on intention to use shared mobility. Moreover, we find that experience factors, including mainly used transportation modes, ownership of shared mobility device, past experience in similar services, satisfaction of existing shared mobility services, and distance from the home to the nearest bus stop, are also statistically influential. The analysis results are expected to lay the foundation for the introduction of shared mobility services and can be used as data for planning smart mobility services in the future.

scholarly journals Impact of the first COVID-19 shutdown on patient volumes and surgical procedures of a Level I trauma center

2021 ◽  
Author(s):  
Carolin A. Kreis ◽  
Birte Ortmann ◽  
Moritz Freistuehler ◽  
René Hartensuer ◽  
Hugo Van Aken ◽  
...  
Keyword(s):  
Surgical Procedures ◽  
Trauma Center ◽  
Control Period ◽  
Open Fractures ◽  
Injury Patterns ◽  
Emergency Patient ◽  
Emergency Operations ◽  
Incidence Proportion ◽  
Level I ◽  
The Impact

Abstract Purpose In Dec 2019, COVID-19 was first recognized and led to a worldwide pandemic. The German government implemented a shutdown in Mar 2020, affecting outpatient and hospital care. The aim of the present article was to evaluate the impact of the COVID-19 shutdown on patient volumes and surgical procedures of a Level I trauma center in Germany. Methods All emergency patients were recorded retrospectively during the shutdown and compared to a calendar-matched control period (CTRL). Total emergency patient contacts including trauma mechanisms, injury patterns and operation numbers were recorded including absolute numbers, incidence proportions and risk ratios. Results During the shutdown period, we observed a decrease of emergency patient cases (417) compared to CTRL (575), a decrease of elective cases (42 vs. 13) and of the total number of operations (397 vs. 325). Incidence proportions of emergency operations increased from 8.2 to 12.2% (shutdown) and elective surgical cases decreased (11.1 vs. 4.3%). As we observed a decrease for most trauma mechanisms and injury patterns, we found an increasing incidence proportion for severe open fractures. Household-related injuries were reported with an increasing incidence proportion from 26.8 to 47.5% (shutdown). We found an increasing tendency of trauma and injuries related to psychological disorders. Conclusion This analysis shows a decrease of total patient numbers in an emergency department of a Level I trauma center and a decrease of the total number of operations during the shutdown period. Concurrently, we observed an increase of severe open fractures and emergency operations. Furthermore, trauma mechanism changed with less traffic, work and sports-related accidents.

scholarly journals PCV75 PATIENTS WITH PULMONARY EMBOLISM AFTER ORTHOPAEDIC SURGERY HAVE SIGNIFICANTLY INCREASED COSTS FOR INPATIENT STAY

2009 ◽  
Vol 12 (7) ◽  
pp. A326
Author(s):  
M Lukac ◽  
J Bielik ◽  
V Foltán ◽  
D Tomek ◽  
D Zatko
Keyword(s):  
Pulmonary Embolism ◽  
Orthopaedic Surgery ◽  
Inpatient Stay

scholarly journals Management of paediatric humeral shaft fractures and associated nerve palsy

2019 ◽  
Vol 13 (5) ◽  
pp. 508-515 ◽  
Author(s):  
M. A. O’Shaughnessy ◽  
J. A. Parry ◽  
H. Liu ◽  
A. A. Stans ◽  
A. N. Larson ◽  
...  
Keyword(s):  
Nerve Palsy ◽  
Analysis Data ◽  
High Energy ◽  
Open Fractures ◽  
Level Of Evidence ◽  
Fracture Displacement ◽  
Shaft Fractures ◽  
Diaphyseal Fractures ◽  
Full Neurological Recovery ◽  
Humerus Shaft

Purpose The aim of this study is to review the management of all paediatric humerus diaphyseal fractures treated at a single institution over a 20-year period. Methods Retrospective review from between 1996 and 2016 identified 96 humerus shaft fractures in paediatric patients (0 to 17 years). After excluding those deceased from inciting trauma, pathological and perinatal fractures, 80 patients remained for analysis. Data collected included age, fracture type, displacement, nerve palsy, treatment, complications and time to union. Radiographs were reviewed at the time of injury and at latest follow-up. Results Of 80 paediatric humeral diaphyseal fractures, 65 (81%) were treated with immobilization. In all, 15 (19%) fractures were treated with surgical stabilization. Most common indications were fracture displacement, open fractures and to improve mobilization in patients with multiple injuries. Fractures were stabilized with a plate (eight), flexible nails (five), external fixation (one) and percutaneous pinning (one). The operative group, compared with the nonoperative group, was older, had more high-energy mechanisms, more open fractures and increased fracture displacement. All patients in the nonoperative and operative groups went on to union with minimal complications. A nerve palsy was present in five patients (6%)with three of the five involving the radial nerve (4%). All nerve palsies were observed and had full neurological recovery. Conclusion Over a 20-year period nonoperative management of paediatric humerus shaft fractures was successful in the majority of patients. Operative stabilization, when rarely indicated, had a low complication rate and improved radiographic alignment. All nerve injuries fully recovered without surgical intervention. Level of evidence IV

Numerical Investigation of Optimal Air Flowrate for Cooling 600 W Brushless Direct-Current Motor

2021 ◽  
Vol 13 (4) ◽  
Author(s):  
Hwabhin Kwon ◽  
Heesung Park
Keyword(s):  
Direct Current ◽  
Air Flow ◽  
Three Dimensional ◽  
Energy Utilization ◽  
Maximum Efficiency ◽  
Heat Sources ◽  
Additional Increase ◽  
Personal Mobility ◽  
Mobility Devices ◽  
Flow Through

Abstract Personal mobility devices have drawn growing attention to relieve the congestion of traffic and air pollution. The efficiency of electric motors is significant in terms of energy utilization, driving range, and lifetime of the devices. In this study, a brushless direct-current (BLDC) motor is numerically investigated to maximize the system efficiency. The inevitable energy losses in the motor are evaluated using heat sources generated in the motor components. The resulting copper and iron losses generate heat and decrease the motor efficiency. With these, the developed three-dimensional numerical model accurately predicts the temperature variations of the motor components in accordance with the experimental results. Numerical simulations are conducted by supplying air flow at a rate of 0 to 40 l/min. The results show that the decreased temperature at copper windings improves the efficiency of the motor as more air flowrate is supplied. Nonetheless, after the temperature at the copper windings reaches 42.5 °C at an air flow of 30 l/min, the temperature remains constant despite additional increase in the air flow. Through a comparison between the improved electrical work by cooling and the consumed energy to supply the air flowrate, the maximum efficiency of the air-cooled BLDC is found to be 86.3% with an optimal air flowrate of 30 l/min.

scholarly journals Comminuted Femur Fracture in a Free Fall Jump: A Case Report

2019 ◽  
Vol 185 (7-8) ◽  
pp. e1318-e1319
Author(s):  
Rachel E Bridwell ◽  
Joshua J Oliver ◽  
Danielle Ziehl ◽  
Lloyd I Tannenbaum ◽  
Patrick M McCarthy
Keyword(s):  
Femoral Neck ◽  
Femoral Neck Fracture ◽  
Femur Fracture ◽  
Free Fall ◽  
High Energy ◽  
Injury Patterns ◽  
Cephalomedullary Nail ◽  
Lower Altitude ◽  
Special Operations ◽  
Neck Fracture

Abstract Military free fall or high-altitude low-opening parachute jumps play a key role in special operations tactics, though injury patterns in these operators are not well characterized. In contrast to lower-altitude static line paratroopers, free fall operators require precise parachute deployment after a prolonged descent, with the potential for high-velocity trauma. This report describes a 33-year-old Marine Corps Reconnaissance operator who sustained left comminuted basicervical femoral neck fracture requiring cephalomedullary nail internal fixation with a full recovery. This femoral neck fracture highlights the high-energy injuries experienced by these invaluable operators, especially when conducting combat or night jumps.

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