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1.
Int Orthop ; 48(1): 79-93, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37668728

RESUMEN

STUDY DESIGN: Systematic review. INTRODUCTION: Total hip arthroplasty (THA) is a well-acknowledged surgical intervention to restore a painless and mobile joint in patients with osteoarticular tubercular arthritis of the hip joint. However, there is still substantial uncertainty about the ideal management, clinical and functional outcomes following THA undertaken in patients with acute Mycobacterium tuberculosis (TB) hip infections. AIM OF THE STUDY: To undertake a systematic review and evaluate existing literature on patients undergoing THA for acute mycobacterium tuberculosis arthritis of the hip. METHODS: A systematic review of electronic databases of PubMed, EMBASE, Scopus, Web of Science and Cochrane Library was performed on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The search focused on "arthroplasty in cases with tuberculosis of hip joint" since inception of databases until July 2023. Data on patient demographics, clinical characteristics, treatment administered, surgical interventions and outcome, as reported in the included studies, were recorded. Median (range) and mean (standard deviation) were used to summarise the data for continuous variables (as reported in the original studies); and frequency/percentage was employed for categorical variables. Available data on Harris hip scores and complications were statistically pooled using random-effects meta-analysis or fixed-effect meta-analysis, as appropriate RESULTS: Among a total of 1695 articles, 15 papers were selected for qualitative summarisation and 12 reporting relevant data were included for proportional meta-analysis. A total of 303 patients (mean age: 34 to 52 years; mean follow-up: 2.5 to 10.5 years) were included in our systematic review. In a majority of included studies, postero-lateral approach and non-cemented prosthesis were employed. Fourteen studies described a single-staged procedure in the absence of sinus, abscess and tubercular infection syndrome (TIS). All surgeries were performed under cover of prolonged course of multi-drug anti-tubercular regimen. The mean Harris hip score (HHS) at final follow-up was 91.36 [95% confidence interval (CI): 89.56-93.16; I2:90.44%; p<0.001]. There were 30 complications amongst 174 (9.9%) patients (95% CI: 0.06-0.13; p=0.14; I2=0%). CONCLUSION: THA is a safe and effective surgical intervention in patients with active and advanced TB arthritis of hip. It is recommended that the surgery be performed under cover of multi-drug anti-tubercular regimen. In patients with active sinus tracts, abscesses and TIS, surgery may be accomplished in a multi-staged manner. The clinical (range of motion, deformity correction, walking ability and pain scores), radiological (evidence of radiological reactivation and implant incorporation) and function outcome (as assessed by HHS) significantly improve after THA in these patients.


Asunto(s)
Artritis , Artroplastia de Reemplazo de Cadera , Radiología , Humanos , Adulto , Persona de Mediana Edad , Artroplastia de Reemplazo de Cadera/efectos adversos , Artroplastia de Reemplazo de Cadera/métodos , Articulación de la Cadera/cirugía , Artritis/cirugía , Radiografía , Resultado del Tratamiento
2.
Int Orthop ; 48(8): 1963-1969, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38619565

RESUMEN

PURPOSE: This study analyses the performance and proficiency of the three Artificial Intelligence (AI) generative chatbots (ChatGPT-3.5, ChatGPT-4.0, Bard Google AI®) and in answering the Multiple Choice Questions (MCQs) of postgraduate (PG) level orthopaedic qualifying examinations. METHODS: A series of 120 mock Single Best Answer' (SBA) MCQs with four possible options named A, B, C and D as answers on various musculoskeletal (MSK) conditions covering Trauma and Orthopaedic curricula were compiled. A standardised text prompt was used to generate and feed ChatGPT (both 3.5 and 4.0 versions) and Google Bard programs, which were then statistically analysed. RESULTS: Significant differences were found between responses from Chat GPT 3.5 with Chat GPT 4.0 (Chi square = 27.2, P < 0.001) and on comparing both Chat GPT 3.5 (Chi square = 63.852, P < 0.001) with Chat GPT 4.0 (Chi square = 44.246, P < 0.001) with. Bard Google AI® had 100% efficiency and was significantly more efficient than both Chat GPT 3.5 with Chat GPT 4.0 (p < 0.0001). CONCLUSION: The results demonstrate the variable potential of the different AI generative chatbots (Chat GPT 3.5, Chat GPT 4.0 and Bard Google) in their ability to answer the MCQ of PG-level orthopaedic qualifying examinations. Bard Google AI® has shown superior performance than both ChatGPT versions, underlining the potential of such large language processing models in processing and applying orthopaedic subspecialty knowledge at a PG level.


Asunto(s)
Inteligencia Artificial , Educación de Postgrado en Medicina , Evaluación Educacional , Ortopedia , Humanos , Ortopedia/educación , Evaluación Educacional/métodos , Educación de Postgrado en Medicina/métodos , Competencia Clínica , Curriculum
3.
Int Orthop ; 47(8): 1947-1961, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37020032

RESUMEN

PURPOSE: This meta-analysis aims to compare the early postoperative recovery, complications encountered, length of hospital stay, and initial functional scores between patellar eversion and non-eversion manoeuvres in patients undergoing during primary total knee arthroplasty (TKA) based on clinical studies available in the literature. METHODS: A systematic literature search was conducted using PubMed, Embase, Web of Science, and the Cochrane Library databases between January 1, 2000 and August 12, 2022. Prospective trials comparing clinical, radiological, and functional outcomes in patients undergoing TKA with and without patellar eversion manoeuvre were included. The meta-analysis was performed using Rev-Man version 5.41 (Cochrane Collaboration). Pooled-odds ratios (for categorical data) and mean differences with 95% confidence intervals (for continuous data) were calculated (p < 0.05 was regarded as statistically significant). RESULTS: Ten (out of the 298 publications identified in this subject) were included for the meta-analysis. The patellar eversion group (PEG) had a significantly shorter tourniquet time [mean difference (MD) - 8.91 min; p = 0.002], although the overall intraoperative blood loss was higher (IOBL; MD 93.02 ml; p = 0.0003). The patellar retraction group (PRG), on the other hand, revealed statistically better early clinical outcomes in terms of shorter time necessary to perform active straight leg raising (MD 0.66, p = 0.0001), shorter time to achieve 90° knee-flexion (MD 0.29, p = 0.03), higher degree of knee flexion achieved at 90 days (MD - 1.90, p = 0.03), and reduced length of hospital stay (MD 0.65, p = 0.03). There was no statistically significant difference in the early complication rates, 36-item short-form health survey (1 year), visual analogue scores (1 year), and Insall-Salvati index at follow-up between the groups. CONCLUSION: The implications from the evaluated studies suggest that in comparison with patellar eversion, patellar retraction manoeuvre during surgery provides significantly faster recovery of quadriceps function, earlier attainment of functional knee range of motion (ROM), and shorter length of hospital stay in patients undergoing TKA.


Asunto(s)
Artroplastia de Reemplazo de Rodilla , Humanos , Artroplastia de Reemplazo de Rodilla/efectos adversos , Estudios Prospectivos , Articulación de la Rodilla/cirugía , Rótula/cirugía , Músculo Cuádriceps/cirugía , Rango del Movimiento Articular
4.
Environ Dev Sustain ; : 1-27, 2023 Jun 08.
Artículo en Inglés | MEDLINE | ID: mdl-37363025

RESUMEN

The purpose of the study is to explore the antecedents of minimalism and, further, to study the impact of minimalism on millennials' well-being via a sense of fulfilment. To understand the origins of minimalism and its following effects on well-being, a theoretical framework is created. An online survey with a structured questionnaire was created to collect the necessary data from respondents. SMART PLS was used to analyse the suggested framework. This research establishes the mediating role of a sense of fulfilment in the interactions between minimalism and well-being and shows how environmental awareness, contemporary aesthetics, voluntary simplicity, normative influence, and resource sharing positively lead to minimalism. A minimalist lifestyle will help to preserve precious resources, reduce waste, and lower carbon emissions, all of which will have a significant positive influence on the environment. Additionally, clearing up clutter will give them more room and time, which will improve their well-being because they will have more time for their family and interests. The study suggests a thorough model to comprehend the origins of minimalism. Additionally, it established a connection between well-being and minimalism.

5.
Postgrad Med J ; 98(1155): 24-28, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33115911

RESUMEN

BACKGROUND: COVID-19 has necessitated the reduction in conventional face-to-face patient consultation to reduce the risk of novel coronavirus SARS-CoV-2 transmission. Traditional pathways to risk assess for deep venous thrombosis (DVT) would involve face-to-face assessment to formulate an appropriate management plan following an initial presentation usually in secondary care or in-hospital settings. Appropriate antithrombotic measures can prevent complication of DVT such as pulmonary embolism with prompt early diagnosis and treatment. METHODS: This observational, pilot study evaluates the possibility of combining telemedicine technology and a virtual examination pathway for remote triage and assessment of patients with suspected DVT. RESULTS: Piloting and development of a virtual risk assessment pathway for DVT involves various challenges and multidisciplinary co-ordination. CONCLUSION: Advances in telecommunication technology can enable clinicians, specialist nurses and hospital departments to develop a virtual examination pathway for remote triage and assessment of patients with suspected DVT. This pathway is not a replacement for conventional 'face-to-face' evaluation, but we believe the template can be explored and refined to act as a blueprint for future applications even when the pandemic has stabilised.


Asunto(s)
COVID-19 , Tecnología , Telemedicina , Trombosis de la Vena , Humanos , Proyectos Piloto , Medición de Riesgo , SARS-CoV-2
6.
Cytopathology ; 33(5): 622-627, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-35488855

RESUMEN

Alveolar soft part sarcoma (ASPS) is a rarely diagnosed tumour of deep soft tissue origin. This tumour is more common in adolescents and young adults and has a slowly progressive clinical course, which often leads to delayed diagnosis and treatment. It is highly vascular, can be confused with other entities like haemangiomas and arteriovenous malformations clinically and radiologically and is thus challenging to report on fine needle aspiration cytology (FNAC). Diagnosing the tumour is difficult on cytology, so knowledge of this entity and the differentials with its morphological mimics on cytology is required for timely diagnosis and early management of the patient. We report a case of ASPS in a young female who presented with a large, painless swelling in the thigh, diagnosed on cytology combined with ancillary testing with immunohistochemical markers.


Asunto(s)
Sarcoma de Parte Blanda Alveolar , Neoplasias de los Tejidos Blandos , Adolescente , Biopsia con Aguja Fina , Femenino , Humanos , Sarcoma de Parte Blanda Alveolar/diagnóstico , Sarcoma de Parte Blanda Alveolar/patología , Neoplasias de los Tejidos Blandos/diagnóstico , Neoplasias de los Tejidos Blandos/patología , Muslo/patología , Adulto Joven
7.
Postgrad Med J ; 97(1152): 650-654, 2021 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-33011681

RESUMEN

COVID-19 pandemic has had a profound impact on the delivery of medical education, training and examination schedule across the world both at undergraduate and at postgraduate (PG) levels. The novel coronavirus SARS-CoV-2 outbreak has resulted in the cancellation of traditional in-person meetings and clinical examination assessments, learning and education activities because of concern of viral transmission. Various medical universities, Royal Medical and Surgical Colleges in the UK have suspended delivery of qualifying examinations until they can be resumed safely with updated social distancing guidelines. This article evaluates the role and the possibility of virtual PG practical examination template based on authors' own recent experience of conducting successful virtual practical PG orthopaedic qualifying examinations during the COVID-19 pandemic in New Delhi, India. Advances in telecommunication technology can enable academic institution and orthopaedic educators to develop such a model and act as a blueprint for the future.


Asunto(s)
COVID-19/epidemiología , Educación a Distancia/métodos , Educación de Postgrado en Medicina/métodos , Evaluación Educacional/métodos , Ortopedia/educación , Adulto , Femenino , Humanos , India/epidemiología , Control de Infecciones/organización & administración , Masculino , Pandemias , Proyectos Piloto , SARS-CoV-2
8.
Knee Surg Sports Traumatol Arthrosc ; 29(8): 2579-2586, 2021 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-33459831

RESUMEN

PURPOSE: The Latarjet procedure can affect the range of motion (ROM) and strength of the shoulder, which determine the time to return to the preinjury level of activity. This study prospectively assessed whether the Latarjet procedure leads to a decrease in range of motion and muscle strength, affecting the time to return to the previous level of activity. METHODS: Fifty-one consecutive patients who underwent the Latarjet procedure for recurrent dislocation of the shoulder were included prospectively. The ROM, strength, Walch-Duplay score, and Rowe score were measured every 3 months for 1 year and then every 6 months for 2 years. Radiological assessments were performed to confirm the graft location, union, and the humeral head position in abduction and external rotation (ER). RESULTS: Out of 51 patients, 49 completed all follow-ups. The median age was 27 years (17-45 years), and the dominant side was involved in 36 patients. The median number of dislocations was 11 (5-50). Twelve patients were sleep dislocators. There was a significant loss (p < 0.0001) of abduction, forward flexion (FF), ER, and internal rotation (IR) in the affected shoulder compared to the contralateral shoulder. Recovery plateaued at 12 months. There was near complete recovery of muscle strength after the Latarjet procedure, and the difference between the affected and contralateral shoulders was not significant (n.s.). The modified Rowe score was excellent in 44 (90%) patients, and the Walch-Duplay score was excellent in 43 patients (88%) at 24 months. Suboptimal results were associated with non-compliance with rehabilitation in two (4%) patients and neglected unreduced dislocation in one (2%) patient. The coracoid graft position was below the equator in 44 patients (90%). Forty-six patients (94%) could return to the previous level of activity. CONCLUSION: The Latarjet procedure results in a restricted ROM of the shoulder, but there is no loss of muscle strength. LEVEL OF EVIDENCE: III.


Asunto(s)
Inestabilidad de la Articulación , Luxación del Hombro , Articulación del Hombro , Artroscopía , Humanos , Recién Nacido , Inestabilidad de la Articulación/cirugía , Rango del Movimiento Articular , Recurrencia , Estudios Retrospectivos , Luxación del Hombro/cirugía , Articulación del Hombro/cirugía
9.
J Arthroplasty ; 36(6): 2239-2247, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-33593623

RESUMEN

BACKGROUND: Patients with postpolio residual paralysis can develop disabling hip arthritis in paralytic as well as a nonparalytic limb, warranting total hip arthroplasty (THA). Limited literature is available on the results of THA among these patients in the form of small series or case reports. We have undertaken a systematic review to evaluate the clinical outcome of THA in patients with poliomyelitis with hip pathologies. METHODS: A systematic search of electronic databases of PubMed, Scopus, and Web of Science pertaining to English literature was undertaken from 1945 to August 2020 to assess the results of THA in patients with poliomyelitis. Information was gathered about demographics, indication, clinical course, complications, functional outcome, survival, and need for any revision surgery in these patients. RESULTS: The literature search revealed 81 articles. Finally, after deduplication and manual selection, 16 relevant articles (128 hips) were included for evaluation. There is a paucity of literature evaluating THA in patients with poliomyelitis over the last 2 decades. The principal reason for arthroplasty was osteoarthritis of the hip in the ipsilateral (paralyzed) limb. A combination of cemented, uncemented, and hybrid implant fixation system was found to be used by surgeons. Addressing instability and perioperative management of limb length discrepancy were found to be challenging propositions. CONCLUSION: THA remains an effective intervention to relieve pain and improve quality of life in patients of poliomyelitis afflicted with either primary or secondary arthritis of the hip. The use of uncemented nonconstrained hip implant designs appears to demonstrate better results than constrained implants.


Asunto(s)
Artroplastia de Reemplazo de Cadera , Prótesis de Cadera , Artroplastia de Reemplazo de Cadera/efectos adversos , Prótesis de Cadera/efectos adversos , Humanos , Parálisis , Calidad de Vida , Reoperación , Resultado del Tratamiento
10.
West Afr J Med ; Vol. 38(10): 985-992, 2021 Oct 29.
Artículo en Inglés | MEDLINE | ID: mdl-34856741

RESUMEN

BACKGROUND: Management of trauma and emergency orthopaedic conditions during the pandemic was reorganised across the United Kingdom including our hospital following the COVID-19 British Orthopaedic Association and National Health Service England guidelines. AIMS: This retrospective, observational cohort study analyses the impact of the first wave of COVID-19 pandemic on trauma and emergency patient care at a district general hospital. A comparative analysis to assess patient characteristics and clinical outcomes during the initial phase of COVID-19 outbreak with a cohort of patients treated during a similar period in 2019 was undertaken. METHODS: Patients who underwent trauma and emergency surgeries between 01 April to 31 May 2020 at a Northwest Mersey NHS Trust were studied and compared to a similar period in 2019. The outcome measures assessed were 30- and 60-day mortality, Time to Surgery, length of stay after surgery, systemic and orthopaedic complications including the subsequent need for surgery. RESULTS: Overall, there was a decrease in the number of patients who underwent trauma or emergency surgery from 184 in 2019 to 116 in 2020. 30- and 60-day mortality slightly increased by 2.05% and 2.68%, respectively. Time to surgery and hospital length of stay were comparable between both cohorts. CONCLUSION: Continuity of services to patients with obligatory injuries was managed using enhanced personal protective equipment and infection control strategies including segregation of patients based on COVID-19 status. Lessons learnt during this period such as COVID-19 testing regime and care pathways have prepared us for the near future. LEVEL OF STUDY: Retrospective Cohort study; Level III.


CONTEXTE: La gestion des traumatismes et des urgences orthopédiques pendant la pandémie a été réorganisée dans tout le Royaume-Uni, y compris dans notre hôpital, conformément aux directives COVID-19 de la British Orthopaedic Association et du National Health Service England. OBJECTIFS: Cette étude de cohorte rétrospective et observationnelle analyse l'impact de la première vague de la pandémie COVID-19 sur les soins aux patients en traumatologie et en urgence dans un hôpital général de district. Une analyse comparative visant à évaluer les caractéristiques des patients et les résultats cliniques pendant la phase initiale de l'épidémie de COVID-19 avec une cohorte de patients traités pendant une période similaire en 2019 a été entreprise. MÉTHODES: Les patients qui ont subi des traumatismes et des chirurgies d'urgence entre le 01 avril et le 31 mai 2020 dans un Northwest Mersey NHS Trust ont été étudiés et comparés à une période similaire en 2019. Les mesures de résultats évaluées étaient la mortalité à 30 et 60 jours, le délai d'intervention chirurgicale, la durée du séjour après la chirurgie, les complications systémiques et orthopédiques, y compris le besoin ultérieur de chirurgie. RÉSULTATS: Dans l'ensemble, le nombre de patients ayant subi une chirurgie traumatique ou d'urgence a diminué, passant de 184 en 2019 à 116 en 2020. La mortalité à 30 et 60 jours a légèrement augmenté de 2,05 % et 2,68 %, respectivement. Le délai d'intervention chirurgicale et la durée de séjour à l'hôpital étaient comparables entre les deux cohortes. CONCLUSION: La continuité des services aux patients présentant des blessures obligatoires a été gérée en utilisant des équipements de protection individuelle améliorés et des stratégies de contrôle des infections, y compris la ségrégation des patients en fonction de leur statut COVID-19. Les leçons apprises au cours de cette période, telles que le régime de test COVID-19 et les parcours de soins, nous ont préparés pour l'avenir proche. NIVEAU DE L'ÉTUDE: Étude rétrospective de cohorte ; Niveau III. MOTS-CLÉS: COVID-19; Coronavirus; pandémie; traumatisme; orthopédie ; mortalité; test COVID-19; évaluation des résultats; soins de santé.


Asunto(s)
COVID-19 , Ortopedia , Prueba de COVID-19 , Estudios de Cohortes , Humanos , Pandemias , Estudios Retrospectivos , SARS-CoV-2 , Medicina Estatal
11.
Phys Rev Lett ; 124(1): 013603, 2020 Jan 10.
Artículo en Inglés | MEDLINE | ID: mdl-31976693

RESUMEN

The hallmark of quantum physics is Planck's constant h, whose finite value entails the quantization that gave the theory its name. The finite value of h gives rise to inevitable zero-point fluctuations even at vanishing temperature. The zero-point fluctuation of mechanical motion becomes smaller with growing mass of an object, making it challenging to observe at macroscopic scales. Here, we transition a dielectric particle with a diameter of 136 nm from the classical realm to the regime where its zero-point motion emerges as a sizable contribution to its energy. To this end, we optically trap the particle at ambient temperature in ultrahigh vacuum and apply active feedback cooling to its center-of-mass motion. We measure an asymmetry between the Stokes and anti-Stokes sidebands of photons scattered by the levitated particle, which is a signature of the particle's quantum ground state of motion.

12.
Pediatr Dermatol ; 37(2): 311-315, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-31994211

RESUMEN

BACKGROUND: Syphilis causes considerable morbidity not only in adults but also in children. Unfortunately, acquired syphilis in children has not received due attention and remains a relatively ignored field. METHODS: This was a retrospective study, in which epidemiologic, clinical, and investigational data were analyzed from medical records of all sexually transmitted infection (STI) cases attending the STI clinic of Pt. B. D. Sharma, PGIMS, Rohtak from January 1992 to November 2018. Children of age ≤14 years with acquired syphilis were studied. RESULTS: Of 9138 STD cases registered from January 1992 to November 2018, 39 were children with acquired syphilis, of whom 22 were males and 17 were females. The majority were in 12-14 years age group (22 cases; 56.41%). A history of sexual abuse could be elicited in 10 patients. Three gave a history of voluntary sexual activity. Examination revealed secondary syphilis in 32, latent syphilis in 6 and only one case of primary chancre. Analysis of incidence of pediatric acquired syphilis cases over three-year intervals during the last 27 years indicated an initial decreasing trend followed by recent slight rise in last 3 years. CONCLUSION: Social inhibitions and reluctance to report child sexual abuse may have led to an underestimate of actual prevalence. The prevalence in the 12- to 14-year age group may indicate emerging trends of promiscuous sexual behavior. The recent rising trend in occurrence of childhood acquired syphilis may mirror the recent resurgence of adult syphilis.


Asunto(s)
Sífilis/diagnóstico , Sífilis/epidemiología , Adolescente , Niño , Preescolar , Femenino , Humanos , Incidencia , India , Lactante , Recién Nacido , Masculino , Estudios Retrospectivos , Factores de Riesgo , Centros de Atención Terciaria , Factores de Tiempo
13.
Monaldi Arch Chest Dis ; 90(4)2020 Nov 30.
Artículo en Inglés | MEDLINE | ID: mdl-33305559

RESUMEN

To the Editor The COVID-19 pandemic has been consistently on the rise across the globe. The recovered patients getting long-term sequelae, especially lung fibrosis and residual neurological deficits, is an area of concern. Another extremely important conundrum is the risk of re-infection. It has been recently documented from Hong Kong  and puts an unpleasant question mark on long term immunity, sampling technique standardization, viral mutation and efficacy of herd immunity. There are definitions for COVID -19 infection and its severity, but unfortunately none for re-infection.


Asunto(s)
COVID-19/virología , Salud Pública/normas , Reinfección/epidemiología , SARS-CoV-2/genética , COVID-19/epidemiología , Portador Sano , Genotipo , Hong Kong/epidemiología , Humanos , Inmunidad Colectiva/fisiología , Mutación , Reinfección/prevención & control , Riesgo , Índice de Severidad de la Enfermedad , Carga Viral/genética
14.
Phys Rev Lett ; 122(22): 223601, 2019 Jun 07.
Artículo en Inglés | MEDLINE | ID: mdl-31283294

RESUMEN

We implement a cold-damping scheme to cool one mode of the center-of-mass motion of an optically levitated nanoparticle in ultrahigh vacuum (10^{-8} mbar) from room temperature to a record-low temperature of 100 µK. The measured temperature dependence on the feedback gain and thermal decoherence rate is in excellent agreement with a parameter-free model. For the first time, we determine the imprecision-backaction product for a levitated optomechanical system and discuss the resulting implications for ground-state cooling of an optically levitated nanoparticle.

15.
Phys Rev Lett ; 123(15): 153601, 2019 Oct 11.
Artículo en Inglés | MEDLINE | ID: mdl-31702279

RESUMEN

We investigate the influence of laser phase noise heating on resolved sideband cooling in the context of cooling the center-of-mass motion of a levitated nanoparticle in a high-finesse cavity. Although phase noise heating is not a fundamental physical constraint, the regime where it becomes the main limitation in Levitodynamics has so far been unexplored and hence embodies from this point forward the main obstacle in reaching the motional ground state of levitated mesoscopic objects with resolved sideband cooling. We reach minimal center-of-mass temperatures comparable to T_{min}=10 mK at a pressure of p=3×10^{-7} mbar, solely limited by phase noise. Finally we present possible strategies towards motional ground state cooling in the presence of phase noise.

17.
Photodermatol Photoimmunol Photomed ; 33(5): 275-281, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28602032

RESUMEN

BACKGROUND: Vitamin D analogues and NBUVB phototherapy are both well-established modalities of treatment in psoriasis. The objective of this open label, intraindividual, left right study was to compare two different vitamin D analogues, calcipotriol and tacalcitol, in combination with NBUVB phototherapy in chronic stable plaque psoriasis. METHODS: Thirty patients with stable plaque psoriasis were enrolled for a 12-week clinical trial. The target lesion on left side was treated topically with tacalcitol ointment once daily, while that on the right side was treated with calcipotriol ointment twice daily. NBUVB phototherapy was given thrice weekly. Efficacy was assessed by target plaque scoring. RESULTS: Both therapies resulted in statistically significant reduction in erythema, scaling, thickness and target plaque score, seen as early as 2 weeks into therapy. However, calcipotriol combination led to an earlier clearance of plaques and a lesser relapse rate than tacalcitol combination. The number of treatment sessions and cumulative NBUVB doses were significantly lower in the calcipotriol-treated group. CONCLUSION: Both vitamin D analogues appear to be safe, effective and cosmetically acceptable, calcipotriol being more efficacious, well tolerated with a rapid onset of action and a better maintenance of response.


Asunto(s)
Calcitriol/análogos & derivados , Fármacos Dermatológicos/uso terapéutico , Dihidroxicolecalciferoles/uso terapéutico , Psoriasis/terapia , Terapia Ultravioleta , Adulto , Calcitriol/efectos adversos , Calcitriol/uso terapéutico , Terapia Combinada , Fármacos Dermatológicos/efectos adversos , Dihidroxicolecalciferoles/efectos adversos , Femenino , Humanos , Masculino , Pomadas , Estudios Prospectivos , Índice de Severidad de la Enfermedad , Terapia Ultravioleta/efectos adversos , Adulto Joven
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