A nanometric window on fullerene formation in the interstellar medium: Insights from molecular dynamics studies.

Understanding the fundamental mechanisms that underlie the synthesis of fullerene molecules in the interstellar medium (ISM) and in the environments of astrophysical objects is an open question. In this regard, using classical molecular dynamics, we demonstrate the possibility of in situ formation of fullerene molecules, such as C60 from graphite, which is known to occur in the ISM, in particular, circumstellar environments. Specifically, when graphite is subjected to thermal and mechanical stimuli that are typical of circumstellar shells, we find that the graphite sheet edges undergo significant restructuring and curling, leading to edge-induced interlayer-interactions and formation of mechanically strained five-membered-ring structural units. These units serve as precursors for the formation of fullerene structures, such as pristine and metastable C60 molecules. The pathways leading to molecular C60 formation consist of a series of steps that involve bond-breakage and subsequent local rearrangement of atoms, with the activation energy barriers of the rate-limiting step(s) being comparable to the energetics of Stone-Wales rearrangement reactions. The identified chemical pathways provide fundamental insights into the mechanisms that underlie C60 formation. Moreover, they clearly demonstrate that top-down synthesis of C60 from graphitic sources is a viable synthesis route at conditions pertaining to circumstellar matter.

Kaplan's Lesion in a Child: A Case Report.

Kaplan's lesion is a rare complex metacarpophalangeal joint dislocation. A 7-year-old female child presented with pain, swelling and inability to move her right index finger. Her mother gave a history of sustaining a fall injury on the same hand around 3 weeks back. Radiographs showed a complex dorsal metacarpophalangeal joint dislocation. As the injury was already 3 weeks old at presentation, a few attempts at closed reduction were tried, under anaesthesia, which was unsuccessful. So, the patient underwent open reduction through a dorsal approach. At a 1-year follow-up, the patient was pain-free and had regained full range of motion of the index finger metacarpophalangeal joint. The differential diagnosis of Kaplan's lesion should be considered when a child presents with finger dislocation. Keywords: joint dislocations; metacarpophalangeal joint; open reduction.

Minimally-Invasive Plate Osteosynthesis for Clavicle Fractures.

Objective To analyze the radiological, clinical, and functional outcomes of clavicle fractures treated with the minimally-invasive plate osteosynthesis (MIPO) technique. Methods From June 2018 to July 2019, 17 cases of clavicular fractures were managed using the MIPO technique under C-arm fluoroscopy. The functional outcomes were assessed using the Constant-Murley score and the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire. The clinical results of union, the complications, the operative time, the hospital stay, as well as infection, were analyzed. Results The mean follow-up time was of 10.41 ± 1.75 months (range: 8 to 14 months). There were 11 male and 6 female patients, with a mean age of 39.05 ± 10.76 years (range: 22 to 57 years). All fractures united on the mean time of 15.35 ± 3.08 weeks (range: 12 to 20 weeks). The mean operative time was of 98.11 ± 13.83 minutes (range: 70 to 130 minutes), and the mean length of the hospital stay was of 4.7 ± 1.12 days (range: 3 to 7 days). The mean Constant-Murley score was of 74.82 ± 6.36 in 4 th postoperstive month, and of 92.35 ± 5.48 in the 8 th postoperative month, which was statistically significant. The mean DASH score was of 9.94 ± 1.55 in the 4 th postoperative month, and of 5.29 ± 1.85 in the 8 th postoperative month, which was also statistically significant. One patient had superficial skin infection at the site of the incision. Conclusions The MIPO technique is an alternative method for the fixation of clavicle fractures, but it is technically more demanding, and requires well-equipped operating room facilities.

Complication of Early Application of One and a Half Hip Spica for Femoral Shaft Fractures in Children below Six Years in a Tertiary Care Hospital: A Descriptive Cross-sectional Study.

Introduction: Hip spica with or without prior traction has become a standard treatment for closed isolated femoral shaft fracture in children below six years. The time of hip spica application is not uniform in the existing literature. The aim of this study is to find out the prevalence of complication of early application of one and a half hip spica for femoral shaft fractures in children below six years in a tertiary care hospital. Methods: A descriptive cross-sectional study was done among 42 children who were managed with early hip spica application (within 72 hours) for femoral shaft fracture from January 2015 to December 2020 after receiving ethical clearance from Institutional Review Committee. Convenient sampling technique was done. Point estimate at 95% Confidence Interval was calculated along with frequency and proportion for binary data. Results: Complication was seen in nine (21.4%) (95% Confidence Interval= 9.02-33.84) patients. Skin breakdown from local pressure had the highest prevalence in our study which was documented in three (7.14%) patients who resolved with conservative treatment. Conclusions: The prevalence of complication of early application of one and a half hip spica for femoral shaft fractures in children below six years was similar to other studies done in similar setting.

Outcome of Neglected Elbow Dislocation Treated with Open Reduction at Rural Tertiary Care Hospital in Nepal.

BACKGROUND: Chronic unreduced dislocation of elbow is a rare injury. Treatment options include open reduction internal fixation with K wire, replacement arthroplasty, excisional arthroplasty, arthrodesis, and hinged external fixator. The aim of this study is to determine the outcome of open reduction internal fixation with trans-olecranon K wire for neglected elbow dislocation. METHODS: This is a retrospective study done in three rural hospital of Karnali. Hospital records were reviewed from July 2015 to May 2018 to identify 11 cases who underwent open reduction internal fixation for neglected elbow dislocation. Pre and Postoperative outcome was assessed using range of motion and Mayo Elbow Performance Index. Data analysis was done using SPSS version 17. RESULTS: The average age of patient was 22.7 years (range 9-50 years). Non dominant hand was involved in 54.55%. The average preoperative elbow extension was 5.9 degree whereas postoperative extension was 15.9 degree. The average preoperative and postoperative elbow flexion was 24.5? and 113.6? respectively. Preoperative and postoperative Mayo elbow performance index was 18.6 and 86.3 respectively. Outcome was excellent in four patients, good in five patients and fair in two patients with one case having superficial infection. CONCLUSIONS: Open reduction and internal fixation with trans-olecranon k wire is an effective treatment method for neglected elbow dislocation. Postoperatively, elbow function is better with minimal complications.

Operative Treatment of Fixed Flexion Deformity of Elbow by Anterior Release: A Case Report.

A 20-year-old male presented to our OPD with stiffness in his right elbow. He gave a history of sustaining a fracture around the same elbow when he was 4 years old. He was treated operatively for the same. In the post-operative period, he did not undergo any physiotherapy. On examination, he had a fixed flexion deformity in his right elbow with a range of motion between 90 and 110 degrees. X-ray did not show any bony abnormalities and MRI revealed susceptibility artifacts in posterior aspect. The elbow was approached anteriorly releasing all the soft tissue contractures. The elbow was immobilised in extension in a plaster cast for 4 weeks. The patient was under regular physiotherapy after plaster removal in the post-operative period. At one year follow up, he has an elbow range of motion between 20 and 120 degrees.

Orthopaedics Practice in a Rural Hospital During the COVID-19 Pandemic: A Descriptive Cross-Sectional Study.

INTRODUCTION: The coronavirus disease 2019  pandemic is one of the biggest public health challenges that we have faced, and has had a significant impact on the delivery of essential healthcare worldwide. Trauma and orthopaedic surgery was one of the most severely affected specialties as all non-emergency surgical cases were cancelled. With the possibility of future peak of corona virus, knowing the impact of Covid on orthopaedics would enable us to manage trauma patient in an effective manner and will help us to resume normal schedule of the trauma care. METHODS: This is a descriptive cross-sectional study. We studied the details of total number of patient at Orthopaedic and trauma outpatient, inpatient and operation theatre of Karnali Academy of Health Sciences from 14th March 2020 to 16 September 2020 as compared with the patient data from the same time period in 2019. RESULTS: There were 2288 patients during the non-Covid period who visited to the orthopaedic outpatient in comparison to 1618 during Covid period. Only 5 implant removals were performed in comparison to 50 removals (90% reduction) in elective cases. But the number of surgical cases was almost similar (204 vs 207 respectively). Total number of hospital stay had significantly reduced in the non-COVID period (average 4 days vs 6 days).There were 181 in-patient admissions during the COVID period while 241 admission during the non-COVID period. CONCLUSIONS: There is reduction in number of orthopaedic and trauma cases during COVID 19 with marked reduction in number of elective cases. Alternative methods of treatment like telemedicine and small scale health camps at peripheral districts should be conducted to treat non-urgent orthopaedic conditions during lockdown.

Minimally-Invasive Plate Osteosynthesis for Clavicle Fractures / Osteossíntese minimamente invasiva com placa para fraturas de clavícula

Abstract Objective To analyze the radiological, clinical, and functional outcomes of clavicle fractures treated with the minimally-invasive plate osteosynthesis (MIPO) technique. Methods From June 2018 to July 2019, 17 cases of clavicular fractures were managed using the MIPO technique under C-arm fluoroscopy. The functional outcomes were assessed using the Constant-Murley score and the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire. The clinical results of union, the complications, the operative time, the hospital stay, as well as infection, were analyzed. Results The mean follow-up time was of 10.41 1.75 months (range: 8 to 14 months). There were 11 male and 6 female patients, with a mean age of 39.05 10.76 years (range: 22 to 57 years). All fractures united on the mean time of 15.35 3.08 weeks (range: 12 to 20 weeks). The mean operative time was of 98.11 13.83 minutes (range: 70 to 130 minutes), and the mean length of the hospital stay was of 4.7 1.12 days (range: 3 to 7 days). The mean Constant-Murley score was of 74.82 6.36 in 4th postoperstive month, and of 92.35 5.48 in the 8th postoperative month, which was statistically significant. The mean DASH score was of 9.94 1.55 in the 4th postoperative month, and of 5.29 1.85 in the 8th postoperative month, which was also statistically significant. One patient had superficial skin infection at the site of the incision. Conclusions The MIPO technique is an alternative method for the fixation of clavicle fractures, but it is technically more demanding, and requires well-equipped operating room facilities.

Resumo Objetivo Analisar o resultado radiológico, clínico e funcional das fraturas da clavícula, tratadas pela técnica de osteossíntese com placa minimamente invasiva (MIPO). Métodos De junho de 2018 a julho de 2019, um total de 17 casos de fraturas claviculares foram tratadas com a técnica de osteossíntese com placa minimamente invasiva (MIPO), sob fluoroscopia com o braço em C. Os resultados funcionais foram avaliados por meio do escore de Constant-Murley e pelo escore de incapacidade do braço, ombro e mão (DASH). Foram analisados os resultados clínicos de consolidação, complicações, tempo cirúrgico, permanência hospitalar e infecção. Resultados O tempo médio de acompanhamento neste estudo foi de 10,41 1,75 meses (variação, 8 a 14 meses). Havia 11 pacientes do sexo masculino e seis do feminino, com média de idade de 39,05 10,76 anos (variação de 22 a 57 anos). Todas as fraturas se consolidaram no tempo médio de 15,35 3,08 semanas (variação, 12 a 20 semanas). O tempo cirúrgico médio foi de 98,11 13,83 minutos (variação, 70 a 130), sendo a permanência hospitalar média de 4,7 1,12 dias (variação de 3 a 7). O escore de Constant-Murley médio foi de 74,82 6,36 no 4° mês e 92,35 5,48 no 8° mês do pós-operatório, o que foi estatisticamente significativo. O escore DASH médio foi de 9,94 1,55 no 4° mês e 5,29 1,85 na 8ª semana do pós-operatório, também sendo estatisticamente significativo. Um paciente apresentou infecção cutânea superficial no local da incisão. Conclusões A técnica MIPO é um método alternativo para a fixação de fraturas da clavícula, porém é tecnicamente mais desafiador, já que necessita de instalações cirúrgicas mais bem equipadas.