Coherent modulation of the electron temperature and electron-phonon couplings in a 2D material.

Ultrashort light pulses can selectively excite charges, spins, and phonons in materials, providing a powerful approach for manipulating their properties. Here we use femtosecond laser pulses to coherently manipulate the electron and phonon distributions, and their couplings, in the charge-density wave (CDW) material 1T-TaSe2 After exciting the material with a femtosecond pulse, fast spatial smearing of the laser-excited electrons launches a coherent lattice breathing mode, which in turn modulates the electron temperature. This finding is in contrast to all previous observations in multiple materials to date, where the electron temperature decreases monotonically via electron-phonon scattering. By tuning the laser fluence, the magnitude of the electron temperature modulation changes from ∼200 K in the case of weak excitation, to ∼1,000 K for strong laser excitation. We also observe a phase change of π in the electron temperature modulation at a critical fluence of 0.7 mJ/cm2, which suggests a switching of the dominant coupling mechanism between the coherent phonon and electrons. Our approach opens up routes for coherently manipulating the interactions and properties of two-dimensional and other quantum materials using light.

[The perception of teachers and students about clinical reasoning in health care careers]. / Razonamiento clínico en carreras de la salud: percepción de estudiantes y docentes.

BACKGROUND: Clinical reasoning (CR) is a training mainstay in health care careers. AIM: To describe the perception of students and teachers about the development of clinical CR in Kinesiology and Dentistry careers. MATERIAL AND METHODS: Exploratory descriptive qualitative study, with 12 informants (six teachers and six students), applying a script of questions through a semi-structured interview. A thematic inductive data analysis was carried out. RESULTS: Two hundred thirty-five meaning units, 38 codes, seven subcategories and three categories were collected. CR was reported as a basic analysis process in health care training. Its necessary elements are knowledge, a learning environment and a facilitator teacher, among others. Motivation, analysis models, variability and exposure are reported as facilitating factors for the development of CR. Teacher paternalism, resistance to change and few learning opportunities are presented as obstacles. Active strategies such as clinical cases, simulation and clinical practice are perceived as facilitators for the development of CR. Those situations where the student does not assume a leading role such as lectures and activities in large groups, are considered as obstacles. CONCLUSIONS: Both students and teachers point to CR as an analysis process that is indispensable in both careers. Exposure to variable educational experiences through active educational strategies in small groups encourages CR.

Identificación de un brote de SARSCoV-2 (Covid-19) en un centro gerontológico de la Ciudad de México.

OBJECTIVE: To describe a Covid-19 outbreak in a gerontological center in Mexico City. MATERIAL AND METHODS: Cross-sectional study in older adults. The association of risk factors for dying from Covid-19 was analyzed using a multiple logistic regression model. RESULTS: One hundred and two elders with an average age of 82.5 ± 8.8 years were included. Fifty-five (54%) tested positive and 47 (46%) were negative for the new coronavirus. Using the multiple logistic regression model, people with frailty had an OR of 11.6 of dying from Covid-19 compared to robust people (p-value = 0.024). CONCLUSION: The Covid-19 outbreak was initially caused by a resident of the center and spread by cross infection. In vulnerable populations, early detection, isolation, and follow-up of contacts should be carried out, as well as the identification of risk factors in order to reduce the spread and mortality caused by SARSCoV-2.

Characteristics and mortality of Mexican patients with COVID-19 and mechanical ventilation.

INTRODUCTION: COVID-19-associated mortality in patients who require mechanical ventilation is unknown in the Mexican population. OBJECTIVE: To describe the characteristics of Mexican patients with COVID-19 who required mechanical ventilation. METHODS: Observational cohort study carried out in an intensive care unit from March 25 to July 17, 2020. Data were obtained from a prospective database and electronic medical records, and were analyzed with the chi-square test, Fisher's exact test or Mann-Whitney's U-test. RESULTS: One hundred patients required mechanical ventilation; median age was 56 years, 31 % were females and 97 % were Latin American. Most common comorbidities were obesity (36 %), diabetes (26 %), hypertension (20 %), and chronic or end-stage kidney disease (10 %). At the end of the analysis, 11 patients remained in the ICU, 31 had been discharged alive and 58 (65.2 %) died; survivors were younger, had lower scores on severity and organ dysfunction scales, lower levels of C-reactive protein at ICU admission, were less likely to receive hemodialysis and vasopressors, and had longer hospital and ICU stays. CONCLUSIONS: This study adds information on the presentation and results of SARS-CoV-2-infected patients who require mechanical ventilation.

INTRODUCCIÓN: La mortalidad por COVID-19 en quienes requieren ventilación mecánica se desconoce en la población mexicana. OBJETIVO: Describir las características de pacientes mexicanos con COVID-19 que requirieron ventilación mecánica. MÉTODOS: Estudio de cohorte observacional en una unidad de terapia intensiva, del 25 de marzo al 17 de julio de 2020. Los datos se obtuvieron de una base de datos prospectiva y de registros clínicos electrónicos; fueron analizados con c2, prueba exacta de Fisher o prueba U de Mann-Whitney. RESULTADOS: Cien pacientes recibieron ventilación mecánica, la edad media fue de 56 años, 31 % era del sexo femenino y 97 %, latinoamericano. Las comorbilidades más comunes fueron obesidad (36 %), diabetes (26 %), hipertensión (20 %) y enfermedad renal crónica o renal terminal (10 %). Al término del análisis, 11 pacientes permanecían en la UCI, 31 egresaron vivos y 58 (65.2 %) fallecieron; los sobrevivientes fueron más jóvenes, con menores puntuación en las escalas de gravedad y disfunción orgánica, menores niveles de proteína C reactiva al ingreso a la UCI, menor propensión a hemodiálisis, necesidad de, necesidad de vasopresores y con mayor estancia hospitalaria y en la UCI. CONCLUSIONES: Este estudio agrega información sobre la presentación y resultados de pacientes con ventilación mecánica infectados con SARS-CoV-2.

Impact of strategic planning, organizational culture imprint and care bundles to reduce adverse events in the ICU.

OBJECTIVE: To evaluate the occurrence of adverse events during a multifaceted program implementation. DESIGN: Cross-sectional secondary analysis. SETTING: The respiratory-ICU of a large tertiary care center. PARTICIPANTS: Retrospectively collected data of patients admitted from 1 March 2010 to 28 February 2014 (usual care period) and from 1 March 2014 to 1 March 2017 (multifaceted program period) were used. INTERVENTIONS: The program integrated three components: (1) strategic planning and organizational culture imprint; (2) training and practice and (3) implementation of care bundles. Strategic planning redefined the respiratory-ICU Mission and Vision, its SWOT matrix (strengths, weaknesses, opportunities, threats) as well as its medium to long-term aims and planned actions. A 'Wear the Institution's T-shirt' monthly conference was given in order to foster organizational culture in healthcare personnel. Training was conducted on hand hygiene and projects 'Pneumonia Zero' and 'Bacteremia Zero'. Finally, actions of both projects were implemented. MAIN OUTCOME MEASURES: Rates of adverse events (episodes per 1000 patient/days). RESULTS: Out of 1662 patients (usual care, n = 981; multifaceted program, n = 681) there was a statistically significant reduction during the multifaceted program in episodes of accidental extubation ([Rate ratio, 95% CI] 0.31, 0.17-0.55), pneumothorax (0.48, 0.26-0.87), change of endotracheal tube (0.17, 0.07-0.44), atelectasis (0.37, 0.20-0.68) and death in the ICU (0.82, 0.69-0.97). CONCLUSIONS: A multifaceted program including strategic planning, organizational culture imprint and care protocols was associated with a significant reduction of adverse events in the respiratory-ICU.

Eventos adversos en una nueva unidad de cuidados intensivos. Influencia del diseño y la tecnología de las instalaciones en las tasas de incidencia.

INTRODUCTION: New hospitals are replacing old facilities. There is little information on the performance of an intensive care unit (ICU) when it is relocated in a new and equipped area. OBJECTIVE: To analyze the impact of the change of ICU facilities from a shared environment to individual beds on the occurrence of adverse events. METHOD: Cross-sectional, comparative study, with prospectively collected data from patients admitted from March 01, 2014 to February 28, 2017 to the former ICU (f-ICU) and from July 17, 2017 to January 17, 2019 to the new ICU (n-ICU) of a public teaching hospital. The rate of adverse events was measured in events per 1,000 patient-days. RESULTS: Among 1,188 patients (f-ICU, n = 681 vs. n-ICU, n = 507), a reduction in the rate of unforeseen cardiac arrest (rate ratio: 0.31; 95% confidence interval [CI] = 0.12-0.80) and an increase in the rate of unplanned extubation (rate ratio: 2.49; 95% CI = 1.24-5.01) were observed, with both being statistically significant. The other nine monitored adverse events showed no changes. CONCLUSIONS: In comparison with the f-ICU, most of the monitored adverse events did not significantly change within the first 18 months of activities at the n-ICU.

INTRODUCCIÓN: Nuevos hospitales están reemplazando a instalaciones antiguas. Existe poca información del desempeño de una unidad de cuidados intensivos (UCI) cuando es reubicada en un área nueva y equipada. OBJETIVO: Analizar el impacto del cambio de instalaciones de un ambiente compartido a camas individuales en la ocurrencia de eventos adversos en la UCI. MÉTODO: Estudio transversal, comparativo, con datos prospectivos de pacientes ingresados del 1 de marzo de 2014 al 28 de febrero de 2017 a la antigua UCI (aUCI) y del 17 de julio de 2017 al 17 de enero de 2019 a la nueva UCI (nUCI) de un hospital-escuela público. La tasa de eventos adversos se midió en eventos por 1000 días-paciente. RESULTADOS: En 1188 pacientes (aUCI, n = 681 versus nUCI, n = 507) se observó reducción en la tasa de paro cardiaco no previsto (razón de tasas 0.31, IC 95 % = 0.12-0.80) e incremento en la tasa de extubación no planeada (razón de tasas 2.49, IC 95 % = 1.24-5.01), estadísticamente significativos; los otros nueve eventos adversos monitoreados no mostraron cambios. CONCLUSIONES: Comparada con la aUCI, la mayor parte de eventos adversos monitoreados no se modificaron significativamente en los 18 meses de inicio de actividades de la nUCI.

[Laparoscopic atypical gastrectomy in the treatment of gastric GIST. Short-term and medium-term outcomes]. / Gastrectomía atípica laparoscópica en el tratamiento de GIST gástrico. Resultados a corto y mediano plazo.

Gastrointestinal stromal tumors are the most common mesenchymal neoplasms of the gastrointestinal tract. Recently, many studies have addressed the laparoscopic management of these tumors. The aim of this study was to evaluate the safety and efficacy of laparoscopic atypical gastrectomy in the resolution of these neoplasms. In the period between January 2009 and December 2015, 24 patients with suspected gastric GIST less than 5 cm in size underwent surgery under this approach. Abscense of peritoneal and liver metastases and immunohistochemistry expression of CD117 antigen were considered as inclusion criteria. We retrospectively analyzed clinical and histopathological characteristics, surgical outcomes, postoperative complications and oncological results. Statistical analysis included 14 patients. The mean age was 60 years (10 women and 4 men) and upper gastrointestinal bleeding was the chief complaint for consultation. Conversion to open surgery was necessary in one case and no major complications, readmissions or reoperations were recorded. The mean tumor size was 41 mm with negative resection margin in all samples. The mean hospital stay was 3 days and no tumor recurrences were recorded in 44 months of follow-up. Laparoscopic atypical gastrectomy for gastric GIST is a safe and effective technique with good outcomes in experienced hands.

Enzymatic dynamic kinetic resolution of racemic N-formyl- and N-carbamoyl-amino acids using immobilized L-N-carbamoylase and N-succinyl-amino acid racemase.

Taking advantage of the catalytic promiscuity of L-carbamoylase from Geobacillus stearothermophilus CECT43 (BsLcar) and N-succinyl-amino acid racemase from Geobacillus kaustophilus CECT4264 (GkNSAAR), we have evaluated the production of different optically pure L-α-amino acids starting from different racemic N-formyl- and N-carbamoyl-amino acids using a dynamic kinetic resolution approach. The enzymes were immobilized on two different solid supports, resulting in improved stability of the enzymes in terms of thermostability and storage when compared to the enzymes in solution. The bienzymatic system retained up to 80% conversion efficiency after 20 weeks at 4 °C and up to 90% after 1 week at 45 °C. The immobilization process also resulted in a great enhancement of the activity of BsLcar toward N-formyl-tryptophan, showing for the first time that substrate specificity of L-carbamoylases can be influenced by this approach. The system was effective for the biosynthesis of natural and unnatural L-amino acids (enantiomeric excess (e.e.) >99.5%), such as L-methionine, L-alanine, L-tryptophan, L-homophenylalanine, L-aminobutyric acid, and L-norleucine, with a higher performance toward N-formyl-α-amino acid substrates. Biocatalyst reuse was studied, and after 10 reaction cycles, over 75% activity remained.

[Morgagni's hernia: Report of a case treated by videolaparoscopy]. / Hernia de Morgagni: Presentación de un caso tratado por videolaparoscopía.

Morgagni's hernia is a rare congenital disorder, usually asymptomatic, but may cause respiratory or gastrointestinal symptoms. We reviewed the clinical findings of a patient with a Morgagni's hernia, diagnosed and treated in our department. The Morgagni's hernia caused various symptoms in our patient and surgery was performed via laparoscopy. A chest CT-scan established the diagnosis. The hernial defect was closed with a synthetic mesh. Our patients had an uneventful postoperative recovery. We believe that the laparoscopic approach is an effective way of repairing Morgagni's hernia.

[Changes observed in three quality indicators after the implementation of improvement strategies in the respiratory intensive care unit]. / Cambios en tres indicadores de calidad después de la implementación de estrategias de mejora en la unidad de cuidados intensivos respiratorios.

OBJECTIVE: To compare the results of quality monitoring after the implementation of improvement strategies in the respiratory intensive care unit (RICU). DESIGN: A prospective, comparative, longitudinal and interventional study was carried out. SETTING: The RICU of Hospital General de México (Mexico). PATIENTS: All patients admitted to the RICU from March 2012 to March 2013. INTERVENTIONS: An evidence-based bundle of interventions was implemented in order to reduce the ratios of three quality indicators: non-planned extubation (NPE), reintubation, and ventilator-associated pneumonia (VAP). VARIABLES OF INTEREST: NPE, reintubation and VAP ratios. RESULTS: A total of 232 patients were admitted, with a mean age of 49.5±17.8years; 119 (50.5%) were woman. The mean Simplified Acute Physiology Score (SAPS-3) was 49.8±17, and the mean Sequential Organ Failure Assessment (SOFA) score was 5.3±4.1. The mortality rate in the RICU was 38.7%. The standardized mortality ratio was 1.50 (95%CI: 1.20-1.84). An improved ratio was observed for reintubation and NPE indicators compared to the ratios of the previous 2011 cohort: 1.6% vs. 7% (P=.02) and 8.1 vs. 17 episodes per 1000 days of mechanical ventilation (P=.04), respectively. A worsened VAP ratio was observed: 18.4 vs. 15.1 episodes per 1000 days of mechanical ventilation (P=.5). CONCLUSIONS: Quality improvement is feasible with the identification of areas of opportunity and the implementation of strategies. Nevertheless, the implementation of a bundle of preventive measures in itself does not guarantee improvements.

[Omental hernia through esophageal hiatus simulates mediastinal lipomatous tumor]. / Hernia omental a través de hiato esofâgico que imita tumor lipomatoso mediastinal.

Omental hernia through the esophageal hiatus is extemely infrequent. Paraesophageal hiatal hernia with omentum in the herniary sac mimics a mediastinal lipomatous tumor and differential diagnosis should be made. This diagnosis requires experience and knowledge of the differences between these two pathologies. In the following study we describe the case of an omental hernia and the characteristics that make it different from other pathologies.

Real-time observation of non-equilibrium phonon-electron energy and angular momentum flow in laser-heated nickel.

Identifying the microscopic nature of non-equilibrium energy transfer mechanisms among electronic, spin, and lattice degrees of freedom is central to understanding ultrafast phenomena such as manipulating magnetism on the femtosecond timescale. Here, we use time- and angle-resolved photoemission spectroscopy to go beyond the often-used ensemble-averaged view of non-equilibrium dynamics in terms of quasiparticle temperature evolutions. We show for ferromagnetic Ni that the non-equilibrium electron and spin dynamics display pronounced variations with electron momentum, whereas the magnetic exchange interaction remains isotropic. This highlights the influence of lattice-mediated scattering processes and opens a pathway toward unraveling the still elusive microscopic mechanism of spin-lattice angular momentum transfer.

Nonequilibrium Phonon Dynamics and Its Impact on the Thermal Conductivity of the Benchmark Thermoelectric Material SnSe.

Thermoelectric materials play a vital role in the pursuit of a sustainable energy system by allowing the conversion of waste heat to electric energy. Low thermal conductivity is essential to achieving high-efficiency conversion. The conductivity depends on an interplay between the phononic and electronic properties of the nonequilibrium state. Therefore, obtaining a comprehensive understanding of nonequilibrium dynamics of the electronic and phononic subsystems as well as their interactions is key for unlocking the microscopic mechanisms that ultimately govern thermal conductivity. A benchmark material that exhibits ultralow thermal conductivity is SnSe. We study the nonequilibrium phonon dynamics induced by an excited electron population using a framework combining ultrafast electron diffuse scattering and nonequilibrium kinetic theory. This in-depth approach provides a fundamental understanding of energy transfer in the spatiotemporal domain. Our analysis explains the dynamics leading to the observed low thermal conductivity, which we attribute to a mode-dependent tendency to nonconservative phonon scattering. The results offer a penetrating perspective on energy transport in condensed matter with far-reaching implications for rational design of advanced materials with tailored thermal properties.

Tuberculosis extrapulmonar: un problema de salud pública.

Extrapulmonary tuberculosis is defined as that case of tuberculosis clinically diagnosed and confirmed by bacteriological studies that affects tissues and organs outside the lung parenchyma. Mexico is in third place among Latin American countries in terms of the incidence of pulmonary and extrapulmonary tuberculosis. Culture methods are still the gold standard for the diagnosis of extrapulmonary tuberculosis since they identify the species and susceptibility to drugs.

La tuberculosis extrapulmonar es aquella tuberculosis diagnosticada clínicamente y confirmada por estudios bacteriológicos que afecta a tejidos y órganos fuera del parénquima pulmonar. México es el tercer lugar en América Latina en incidencia de tuberculosis pulmonar y extrapulmonar. Los métodos de cultivo siguen siendo el método de referencia para el diagnóstico de tuberculosis extrapulmonar, ya que identifican la especie y la sensibilidad a los fármacos.

Burnout symptoms among physicians and nurses before, during and after COVID-19 care. / Síntomas de Burnout entre médicos y enfermeros antes, durante y después de atender pacientes con COVID-19.

OBJECTIVE: this study evaluated burnout symptoms among physicians and nurses before, during and after COVID-19 care. METHOD: a cross-sectional comparative study in the Pulmonary Care unit of a tertiary-level public hospital. The Maslach Burnout Inventory was used. RESULTS: 280 surveys were distributed across three periods: before (n=80), during (n=105) and after (n=95) COVID-19 care; 172 surveys were returned. The response rates were 57.5%, 64.8% and 61.1%, respectively. The prevalence of severe burnout was 30.4%, 63.2% and 34.5% before, during and after COVID-19 care (p<0.001). Emotional exhaustion (p<0.001) and depersonalization (p=0.002) symptoms were more prevalent among nurses than among physicians. Severe burnout was more prevalent in women, nurses and night shift staff. CONCLUSION: the high prevalence of burnout doubled in the first peak of hospital admissions and returned to pre-pandemic levels one month after COVID-19 care ended. Burnout varied by gender, shift and occupation, with nurses among the most vulnerable groups. Focus on early assessment and mitigation strategies are required to support nurses not only during crisis but permanently.

The Prevalence of Depression and Anxiety Symptoms and Their Association With Respiratory Diseases.

INTRODUCTION: Patients with respiratory diseases face adverse situations such as symptom management, general condition deterioration, and a hostile perception of the hospital environment, favoring the appearance of anxiety and depression. METHODS: A total of 317 patients hospitalized for a disease of pulmonary origin were analyzed and divided into the following subgroups: infectious, oncological, acute, and chronic diseases. Patients over 18 years of age with preserved cognitive capacity were included in the study. The Hospital Anxiety and Depression Scale (HADS) was applied to them on the second or fourth day of their hospital stay and five days after the first evaluation. Multiple linear regression models were carried out to analyze the association between anxiety and depression measured over two different periods. The models present the statistically significant variables with a 95% confidence level. RESULTS: The patients presented with anxiety in 74.4% of cases, mainly those with acute respiratory diseases (42.4%) and neoplastic diseases (27.5%). A total of 69.5% presented with depression, with symptoms more significant in those with chronic and oncological pulmonary diseases and those with no job. Patients with at least one comorbidity presented with anxiety in 53.9% of cases and depression in 52.1% of cases. Linear regression models were carried out and showed that anxiety was 1.75 and 1.84 times more frequent in patients with chronic diseases compared to those with infectious pathologies in the first and second reviews, respectively. The linear regression model also showed a higher frequency of depressive symptoms in patients with chronic conditions (1.62 times) compared to the group with infectious and contagious pathologies, and prolonged hospital stays were associated with depressive symptoms 1.37 times more than short stays. CONCLUSIONS: Anxiety and depression are frequent disorders in patients with respiratory diseases, negatively affecting the prognosis. Routine mental health screening and multidisciplinary management are essential in this population.

An allosteric switch between the activation loop and a c-terminal palindromic phospho-motif controls c-Src function.

Autophosphorylation controls the transition between discrete functional and conformational states in protein kinases, yet the structural and molecular determinants underlying this fundamental process remain unclear. Here we show that c-terminal Tyr 530 is a de facto c-Src autophosphorylation site with slow time-resolution kinetics and a strong intermolecular component. On the contrary, activation-loop Tyr 419 undergoes faster kinetics and a cis-to-trans phosphorylation switch that controls c-terminal Tyr 530 autophosphorylation, enzyme specificity, and strikingly, c-Src non-catalytic function as a substrate. In line with this, we visualize by X-ray crystallography a snapshot of Tyr 530 intermolecular autophosphorylation. In an asymmetric arrangement of both catalytic domains, a c-terminal palindromic phospho-motif flanking Tyr 530 on the substrate molecule engages the G-loop of the active kinase adopting a position ready for entry into the catalytic cleft. Perturbation of the phospho-motif accounts for c-Src dysfunction as indicated by viral and colorectal cancer (CRC)-associated c-terminal deleted variants. We show that c-terminal residues 531 to 536 are required for c-Src Tyr 530 autophosphorylation, and such a detrimental effect is caused by the substrate molecule inhibiting allosterically the active kinase. Our work reveals a crosstalk between the activation and c-terminal segments that control the allosteric interplay between substrate- and enzyme-acting kinases during autophosphorylation.

Pulmonary aspergilloma in immunocompromised patients in a Respiratory Care Unit.

INTRODUCTION: Pulmonary aspergilloma is commonly associated with comorbidities that cause immunodeficiency such as diabetes mellitus, tuberculosis, human immunodeficiency virus/acquired immunodeficiency syndrome and/or a pre-existing parenchymal lung disease such as chronic obstructive pulmonary disease. Predisposing factors can further increase the risk of acquiring this mycosis. Our objective was to determine the frequency, clinical and microbiological characteristics of pulmonary aspergilloma in immunocompromised patients. METHODOLOGY: Retrospective case series of patients diagnosed with pulmonary aspergilloma in a respiratory care unit in Mexico City from 2000 to 2019 was studied. Bronchoalveolar lavage cultures on Sabouraud-dextrose agar and serum galactomannan determination were performed on each patient. RESULTS: We identified twenty-four patients with pulmonary aspergilloma (sixteen male and eight female), thirteen had a history of tuberculosis (54%), seven of diabetes mellitus (29%), three of human immunodeficiency virus/acquired immunodeficiency syndrome (13%) and one of chronic obstructive pulmonary disease (4%). The most commonly reported symptoms were hemoptysis in eighteen patients (75%), dyspnea in sixteen patients (67%) and chest pain in thirteen patients (54%). Aspergillus fumigatus was identified in all cultures and galactomannan was positive in 21 serum samples (87%). CONCLUSIONS: Coexistence of diseases that could suppress the immune system predispose to pulmonary aspergilloma; clinical presentation is often confused with other systemic diseases. A high degree of clinical suspicion is important for early detection.

Nonequilibrium sub-10 nm spin-wave soliton formation in FePt nanoparticles.

Magnetic nanoparticles such as FePt in the L10 phase are the bedrock of our current data storage technology. As the grains become smaller to keep up with technological demands, the superparamagnetic limit calls for materials with higher magnetocrystalline anisotropy. This, in turn, reduces the magnetic exchange length to just a few nanometers, enabling magnetic structures to be induced within the nanoparticles. Here, we describe the existence of spin-wave solitons, dynamic localized bound states of spin-wave excitations, in FePt nanoparticles. We show with time-resolved x-ray diffraction and micromagnetic modeling that spin-wave solitons of sub-10 nm sizes form out of the demagnetized state following femtosecond laser excitation. The measured soliton spin precession frequency of 0.1 THz positions this system as a platform to develop novel miniature devices.