Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 74
Filtrar
1.
HCA Healthc J Med ; 5(2): 181-182, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38984224

RESUMEN

Description Death does not thrill me anymore. I am a trauma surgeon extraordinaire! The patient had suffered a traumatic brain injury and has struggled for weeks. He is only 16. Today, the family decided to make him "comfort care." I was at the end of my call, exhausted, drained of all energy. I looked out of the ICU window and saw the fading rain and the city lights. It somehow reminded me of a precious life ebbing away, and I burst into a silent scream. I am still human.

2.
Cureus ; 16(5): e60907, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38910654

RESUMEN

Intra-abdominal hemorrhage resulting from a ruptured, large hepatic cyst in a polycystic liver disease (PCLD) patient is rare and potentially fatal if not addressed promptly. Only a few isolated cases have previously been reported. The usual patient profile consists of elderly patients on anticoagulation, as is demonstrated in our case. Intra-hepatic cysts are broadly classified into congenital, traumatic, infectious, parasitic, and neoplastic. Congenital intra-hepatic cysts can consist of both simple and PCLD, as is outlined in our case. Simple cysts are usually asymptomatic, but occasionally they may achieve larger dimensions and lead to complications such as rupture, obstruction, infection, hemorrhage, and even portal hypertension. We present an uncommon case of a 78-year-old patient with PCLD on rivaroxaban who presented initially with diffuse abdominal pain, distension, and progression into hemodynamic instability. A computerized tomography (CT) scan revealed a ruptured left hepatic lobe cyst, causing hemoperitoneum and resulting in an acute abdomen. This case was complicated by the patient's anticoagulation status and anomalous hepatic vasculature pattern. Interventional radiology (IR) successfully identified the aberrant bleeding vessel and stopped the active extravasation with super-selective coil embolization.

3.
Cureus ; 16(5): e60870, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38910763

RESUMEN

Necrotizing fasciitis (NF) poses a diagnostic challenge due to its rarity and similarity in presentation with other critical conditions. We report a case of a 79-year-old male who initially presented with altered mental status and stroke-like symptoms; he was ultimately diagnosed with abdominal wall NF spreading to the lower extremity. Despite a history of cecal mass perforation noted in prior imaging, the patient had been discharged from an outside emergency room on antibiotics, highlighting a missed opportunity for early intervention. Subsequent deterioration led to sepsis, organ failure, and ultimately, the detection of NF. Prompt recognition of subtle skin changes and laboratory abnormalities, along with a detailed physical examination, is essential for a timely and accurate diagnosis. Surgical debridement, coupled with broad-spectrum antibiotics, remains the cornerstone of treatment. Delays in surgical management significantly increase mortality, emphasizing the importance of prompt diagnosis and intervention. This case underscores the necessity for heightened awareness among healthcare providers to recognize NF promptly, especially when its clinical presentation overlaps with other critical conditions. Multidisciplinary collaboration and continued education are imperative to improve outcomes and prevent delays in the diagnosis and treatment of NF.

4.
Cureus ; 16(3): e56889, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38659564

RESUMEN

Bilateral acetabular fractures, though rare, pose significant challenges in both diagnosis and management due to their association with high-energy trauma and the potential for long-term disability. This case report presents the clinical course of a 27-year-old female who presented to our department after a motorcycle accident with bilateral acetabular fractures. Initial assessment revealed nondisplaced bilateral acetabular fractures, along with associated injuries including a right ulnar styloid fracture. Further evaluation via 3D CT scan delineated associated column fractures on the right and posterior + anterior wall fractures on the left, classified according to the Letournel and Judet system. Notably, this specific combination of acetabular fractures has not been documented in existing literature as per our investigation. The surgical intervention involved an anterior intrapelvic approach for open reduction and internal fixation (ORIF) of the right acetabulum, while the left acetabulum was managed conservatively. Postoperatively, the patient is scheduled for non-weightbearing activity until radiographic evidence of fracture healing is observed. This case underscores the importance of tailored surgical approaches and comprehensive management strategies in optimizing outcomes for patients with bilateral acetabular fractures.

5.
Neuron ; 112(12): 1978-1996.e6, 2024 Jun 19.
Artículo en Inglés | MEDLINE | ID: mdl-38599212

RESUMEN

Interactions among neuronal, glial, and vascular components are crucial for retinal angiogenesis and blood-retinal barrier (BRB) maturation. Although synaptic dysfunction precedes vascular abnormalities in many retinal pathologies, how neuronal activity, specifically glutamatergic activity, regulates retinal angiogenesis and BRB maturation remains unclear. Using in vivo genetic studies in mice, single-cell RNA sequencing (scRNA-seq), and functional validation, we show that deep plexus angiogenesis and paracellular BRB maturation are delayed in Vglut1-/- retinas where neurons fail to release glutamate. By contrast, deep plexus angiogenesis and paracellular BRB maturation are accelerated in Gnat1-/- retinas, where constitutively depolarized rods release excessive glutamate. Norrin expression and endothelial Norrin/ß-catenin signaling are downregulated in Vglut1-/- retinas and upregulated in Gnat1-/- retinas. Pharmacological activation of endothelial Norrin/ß-catenin signaling in Vglut1-/- retinas rescues defects in deep plexus angiogenesis and paracellular BRB maturation. Our findings demonstrate that glutamatergic neuronal activity regulates retinal angiogenesis and BRB maturation by modulating endothelial Norrin/ß-catenin signaling.


Asunto(s)
Barrera Hematorretinal , Proteínas del Ojo , Ácido Glutámico , Proteínas del Tejido Nervioso , Transducción de Señal , beta Catenina , Animales , Barrera Hematorretinal/metabolismo , beta Catenina/metabolismo , Ratones , Ácido Glutámico/metabolismo , Proteínas del Tejido Nervioso/metabolismo , Proteínas del Tejido Nervioso/genética , Proteínas del Ojo/metabolismo , Proteínas del Ojo/genética , Transducción de Señal/fisiología , Proteína 1 de Transporte Vesicular de Glutamato/metabolismo , Neuronas/metabolismo , Ratones Noqueados , Neovascularización Retiniana/metabolismo , Retina/metabolismo , Ratones Endogámicos C57BL , Angiogénesis
6.
bioRxiv ; 2024 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-37503079

RESUMEN

Interactions among neuronal, glial and vascular components are crucial for retinal angiogenesis and blood-retinal barrier (BRB) maturation. Although synaptic dysfunction precedes vascular abnormalities in many retinal pathologies, how neuronal activity, specifically glutamatergic activity, regulates retinal angiogenesis and BRB maturation remains unclear. Using in vivo genetic studies in mice, single-cell RNA-sequencing and functional validation, we show that deep plexus angiogenesis and paracellular BRB maturation are delayed in Vglut1 -/- retinas where neurons fail to release glutamate. In contrast, deep plexus angiogenesis and paracellular BRB maturation are accelerated in Gnat1 -/- retinas where constitutively depolarized rods release excessive glutamate. Norrin expression and endothelial Norrin/ß-catenin signaling are downregulated in Vglut1 -/- retinas, and upregulated in Gnat1 -/- retinas. Pharmacological activation of endothelial Norrin/ß-catenin signaling in Vglut1 -/- retinas rescued defects in deep plexus angiogenesis and paracellular BRB maturation. Our findings demonstrate that glutamatergic neuronal activity regulates retinal angiogenesis and BRB maturation by modulating endothelial Norrin/ß-catenin signaling.

7.
Cureus ; 15(11): e48091, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-38046747

RESUMEN

Background and objective Facial fractures represent a growing concern among an aging population prone to falls. In light of this, this study aimed to investigate differential facial fracture patterns and outcomes based on age effects. Determining the differences between the severity and type of facial fractures in populations of different ages will help guide clinical decision-making when managing patients with facial fractures. Methods This was a single-center study involving trauma registry data, from July 1, 2016, to January 31, 2022. The inclusion criteria were based on the International Classification of Diseases (ICD-10) diagnosis of facial fracture. A linear regression was performed to ascertain the effects of predictor variables on the likelihood that a facial fracture trauma patient would experience various age effects on injury location, mortality, and morbidity. Results A total of 1575 patients were included in the analysis. A significant regression equation was found (F(47,1476)=42.46, p<0.01), with an R2 of 0.57. Older facial fracture trauma patients were more likely to be female (ß=3.13, p<0.01) with fractures to their zygoma (ß=2.57, p=0.02). Higher Abbreviated Injury Scale (AIS) facial region scores (ß=2.21, p=0.03), longer hospital length of stay (ß=0.07, p=0.02), and in-hospital mortality (ß=10.47, p<0.01) were also associated with older age. Older age was additionally associated with a higher level of several morbidity markers. Younger facial fracture trauma patients were more likely to be African American (ß=-5.46, p<0.01) or other, non-Caucasian race (ß=-8.66, p<0.01) and to have mandible fracture patterns (ß=-3.63, p<0.01). The younger patients were more likely to be fully activated (ß=-3.10, p<0.01) with a higher shock index ratio (SIR) (ß=-7.36, p<0.01). Injury mechanisms in younger facial fracture patients were more likely to be assault (ß=-12.43, p<0.01), four-wheeler/ATV accident (ß=-24.80, p<0.01), gunshot (ß=-15.18, p<0.01), moped accident (ß=-13.50, p<0.01), motorcycle accident (ß=-12.31, p<0.01), motor vehicle accident (ß=-16.52, p<.01), or pedestrian being struck by a motor vehicle (ß=-10.69, p=0.02). Conclusions Based on our findings, age effects impact facial fracture patterns and outcomes. Younger patients are more likely to experience multisystem injuries via non-fall trauma. On the other hand, older patients are more likely to experience more severe primary facial injuries. Older patients are also at a higher risk of fall-related trauma. Disparities also exist between genders and races, with male and non-Caucasian patients being at a higher risk of injury from facial fractures at a younger age. With an aging population, the prevalence of falls is likely to increase. Thus, facial fractures represent a growing healthcare burden and warrant future investments related to care and treatment.

8.
J Am Chem Soc ; 145(48): 26477-26486, 2023 12 06.
Artículo en Inglés | MEDLINE | ID: mdl-37993986

RESUMEN

Heme dioxygenases oxidize the indole ring of tryptophan to kynurenine which is the first step in the biosynthesis of several important biomolecules like NAD, xanthurenic acid, and picolinic acid. A ferrous heme dioxygen adduct (or FeIII-O2•-) is the oxidant, and both the atoms of O2 are inserted in the product and its catalytic function has been difficult to emulate as it is complicated by competing rapid reactions like auto-oxidation and/or formation of the µ-oxo dimer. In situ resonance Raman spectroscopy technique, SERRS-RDE, is used to probe the species accumulated during electrochemical ORR catalyzed by site-isolated imidazole-bound iron porphyrin installed on a self-assembled monolayer covered electrode. These in situ SERRS-RDE data using labeled O2 show that indeed a FeIII-O2•- species accumulate on the electrode during ORR between -0.05 and -0.30 V versus Ag/AgCl (satd. KCl) and is reduced by proton coupled electron transfer to a FeIII-OOH species which, on the other hand, builds up on the electrode between -0.20 and -0.40 V versus Ag/AgCl (satd. KCl). This FeIII-OOH species then gives way to a FeIV═O species, which accumulates at -0.50 V versus Ag/AgCl (satd. KCl). When 2,3-dimethylindole is present in the solution and the applied potential is held in the range where FeIII-O2•- species accumulate, it gets oxidized to N-(2-acetylphenyl)acetamide retaining both the oxygens from O2 mimicking the reaction of heme dioxygenases. Turnover numbers more than 104 are recorded, establishing this imidazole-bound ferrous porphyrin as a functional model of heme dioxygenases.


Asunto(s)
Dioxigenasas , Porfirinas , Hierro/química , Hemo/química , Oxígeno/química , Oxidación-Reducción , Catálisis , Compuestos Férricos/química , Imidazoles
9.
Cureus ; 15(8): e43150, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37692619

RESUMEN

Injuries to the common femoral artery (CFA) are usually associated with local fractures. Other common mechanisms of injury include intimal disruption, intramural hematomas, and subintimal fibrosis. Occlusions to the CFA may also result from blood clots or arterial emboli via blunt injury. Blunt trauma causing injury to the common femoral artery is exceedingly rare. Blunt injury to the CFA may be caused by "motor-scooter-handlebar syndrome." We present a unique case where the delayed diagnosis of such an injury led to acute renal failure, rhabdomyolysis, and prolonged morbidity.

10.
HCA Healthc J Med ; 4(4): 327-328, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37753409

RESUMEN

Description COVID brought its toll of deaths. Something the human race has not experienced in recent times. Something almost unimaginable in the modern world! But having joined a new hospital and moved to a sleepy old town, COVID gave me a sense of solitude I have not experienced for eons. There are times you wonder at the endless ocean in front of you and communicate with your inner soul.

11.
Am Surg ; 89(9): 3803-3810, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37526073

RESUMEN

BACKGROUND: The incidence and causes of facial fractures differ between patients, but patterns arise within populations. These patterns vary by gender, age, and between countries. This study aims to determine variables to identify patients at risk for facial fractures in a United States trauma population. METHODS: This is a single-center study of Trauma Registry data, inclusive of years July 1, 2016, to January 31, 2022. Inclusion criteria were based upon all trauma patients. Confirmation of a non-isolated facial fracture (dependent variable) was verified using ICD10 diagnosis codes. A logistic regression was performed in SPSS to ascertain the effects of predictor variables on the likelihood that a trauma patient will experience a facial fracture. RESULTS: 20377 patients were included in the analysis based upon the requirements specified in the methods section; 1575 (7%) had a positive facial fracture. The logistic regression model was statistically significant (N = 18507, P < .01). Significant risk factors for facial fracture identified included helicopter transport (OR = 1.35, P < .01) and increasing injury severity scores (OR = 1.07, P < .01). Modes of injury most likely to predict facial fracture included assault (OR = 6.62, P < .01), moped (OR = 2.02, P < .01), and motorcycle trauma (OR = 1.55, P < .01). The discharge disposition most likely among facial fracture patients included short-term general hospital (OR = 1.71, P < .01) and intermediate care facility (OR = 4.47, P < .01). CONCLUSIONS: Patients with traumatic injuries from assault, moped, and motorcycle accidents were more likely to present with facial fractures. These patients had more severe injuries, seen as increased ISS scores, higher likelihood of transport by helicopter, and the need for additional care after discharge.


Asunto(s)
Fracturas Craneales , Centros Traumatológicos , Humanos , Estudios Retrospectivos , Fracturas Craneales/epidemiología , Fracturas Craneales/etiología , Fracturas Craneales/diagnóstico , Puntaje de Gravedad del Traumatismo , Factores de Riesgo , Huesos Faciales/lesiones
12.
J Trauma Nurs ; 30(3): 150-157, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37144804

RESUMEN

BACKGROUND: The Pediatric Emergency Care Applied Research Network (PECARN) traumatic brain injury algorithm is used to identify children at low risk of clinically significant traumatic brain injuries to reduce computed tomography (CT) exposure. Adapting PECARN rules based on population-specific risk stratification has been suggested to improve diagnostic accuracy. OBJECTIVE: This study sought to identify center-specific patient variables, beyond PECARN rules, that may enhance the identification of patients requiring neuroimaging. METHODS: This single-center, retrospective cohort study was conducted from July 1, 2016, to July 1, 2020, in a Southwestern U.S. Level II pediatric trauma center. The inclusion criteria were adolescents (10-15 years), Glasgow Coma Scale (13-15), with a confirmed mechanical blow to the head. Patients without a head CT were excluded. Logistic regression was performed to identify additional complicated mild traumatic brain injury predictor variables beyond the PECARN. RESULTS: There were 136 patients studied; 21 (15%) presented with a complicated mild traumatic brain injury. Relative to motorcycle collision or all-terrain vehicle trauma (odds ratio [OR] 211.75, 95% confidence interval, CI [4.51, 9931.41], p < .001), an unspecified mechanism (OR 42.0, 95% CI [1.30, 1350.97], p = .03) and consult activation (OR 17.44, 95% CI [1.75, 173.31], p = .01) were significantly associated with complicated mild traumatic brain injury. CONCLUSIONS: We identified additional factors associated with complex mild traumatic brain injury, including motorcycle collision and all-terrain vehicle trauma, unspecified mechanism, and consult activation that are not in the PECARN imaging decision rule. Adding these variables may aid in determining the need for appropriate CT scanning.


Asunto(s)
Experiencias Adversas de la Infancia , Conmoción Encefálica , Lesiones Traumáticas del Encéfalo , Traumatismos Craneocerebrales , Adolescente , Niño , Humanos , Conmoción Encefálica/diagnóstico por imagen , Traumatismos Craneocerebrales/diagnóstico , Técnicas de Apoyo para la Decisión , Estudios Retrospectivos , Servicio de Urgencia en Hospital , Lesiones Traumáticas del Encéfalo/diagnóstico por imagen
13.
Am Surg ; 89(8): 3658-3660, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37139891

RESUMEN

The COVID-19 mandated lockdown created unintended outcomes in traumatic injury patterns and psychosocial behaviors compared to previous years during the same timeframe. The aim of this research is to describe a population of trauma patients during the past 5 years to determine particular trends in trauma patterns and trauma severity. A retrospective cohort study on all adult (≥18 years) trauma patients admitted to this ACS verified Level I trauma center in South Carolina, inclusive years 2017 to 2021. A total of 3281 adult trauma patients were included during the lockdown period across 5 years. There was an increase in penetrating injuries in 2020 compared to 2019 (9% vs 4%, P < .01). The psychosocial impacts of government-mandated lockdowns may lead to increased alcohol consumption leading to a higher degree of injury severity and morbidity markers in the trauma population.


Asunto(s)
COVID-19 , Heridas Penetrantes , Adulto , Humanos , Estudios Retrospectivos , COVID-19/epidemiología , Control de Enfermedades Transmisibles , Heridas Penetrantes/epidemiología , Morbilidad , Centros Traumatológicos
14.
Am Surg ; 89(2): 216-223, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-36112785

RESUMEN

BACKGROUND: Few large investigations have addressed the prevalence of COVID-19 infection among trauma patients and impact on providers. The purpose of this study was to quantify the prevalence of COVID-19 infection among trauma patients by timing of diagnosis, assess nosocomial exposure risk, and evaluate the impact of COVID-19 positive status on morbidity and mortality. METHODS: Registry data from adults admitted 4/1/2020-10/31/2020 from 46 level I/II trauma centers were grouped by: timing of first positive status (Day 1, Day 2-6, or Day ≥ 7); overall Positive/Negative status; or Unknown if test results were unavailable. Groups were compared on outcomes (Trauma Quality Improvement Program complications) and mortality using univariate analysis and adjusted logistic regression. RESULTS: There were 28 904 patients (60.7% male, mean age: 56.4, mean injury severity score: 10.5). Of 13 274 (46%) patients with known COVID-19 status, 266 (2%) were Positive Day 1, 119 (1%) Days 2-6, 33 (.2%) Day ≥ 7, and 12 856 (97%) tested Negative. COVID-19 Positive patients had significantly worse outcomes compared to Negative; unadjusted comparisons showed longer hospital length of stay (10.98 vs 7.47;P < .05), higher rates of intensive care unit (57.7% vs 45.7%; P < .05) and ventilation use (22.5% vs 16.9%; P < .05). Adjusted comparisons showed higher rates of acute respiratory distress syndrome (1.7% vs .4%; P < .05) and death (8.1% vs 3.4%; P < .05). CONCLUSIONS: This multicenter study conducted during the early pandemic period revealed few trauma patients tested COVID-19 positive, suggesting relatively low exposure risk to care providers. COVID-19 positive status was associated with significantly higher mortality and specific morbidity. Further analysis is needed with consideration for care guidelines specific to COVID-19 positive trauma patients as the pandemic continues.


Asunto(s)
COVID-19 , Heridas y Lesiones , Humanos , Masculino , Adulto , Persona de Mediana Edad , Femenino , COVID-19/epidemiología , Prevalencia , Unidades de Cuidados Intensivos , Puntaje de Gravedad del Traumatismo , Morbilidad , Centros Traumatológicos , Estudios Retrospectivos , Heridas y Lesiones/complicaciones , Heridas y Lesiones/epidemiología , Heridas y Lesiones/terapia
15.
Ann Emerg Med ; 81(3): 364-374, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36328853

RESUMEN

STUDY OBJECTIVE: Evaluate the utility of routine rescanning of older, mild head trauma patients with an initial negative brain computed tomography (CT), who is on a preinjury antithrombotic (AT) agent by assessing the rate of delayed intracranial hemorrhage (dICH), need for surgery, and attributable mortality. METHODS: Participating centers were trained and provided data collection instruments per institutional review board-approved protocols. Data were obtained from manual chart review and electronic medical record download. Adults ≥55 years seen at Level I/II Trauma Centers, between 2017 and 2019 with suspected head trauma, Glasgow Coma Scale 14 to 15, negative initial brain CT, and no other Abbreviated Injury Scale injuries >2 were identified, grouped by preinjury AT therapy (AT- or AT+) and compared on dICH rate, need for operative neurosurgical intervention, and attributable mortality using univariate analysis (α=.05). RESULTS: A total of 2,950 patients from 24 centers were enrolled; 280 (9.5%) had a repeat brain CT. In those rescanned, the dICH rate was 15/126 (11.9%) for AT- and 6/154 (3.9%) in AT+. Assuming nonrescanned patients did not suffer clinically meaningful dICH, the dICH rate would be 15/2001 (0.7%) for AT- and 6/949 (0.6%) for AT+. No surgical operations were done for dICH. All-cause mortality was 9/2950 (0.3%) and attributable mortality was 1/2950 (0.03%). The attributable death was an AT+, dICH patient whose family declined intervention. CONCLUSION: In older patients with an initial Glasgow Coma Scale of 14 to 15 and a negative initial brain CT scan, the dICH rate is low (<1%) and of minimal clinical consequence, regardless of AT use. In addition, no patient had operative neurosurgical intervention. Therefore, routine rescanning is not supported based on the results of this study.


Asunto(s)
Traumatismos Craneocerebrales , Fibrinolíticos , Adulto , Humanos , Anciano , Tomografía Computarizada por Rayos X/métodos , Hemorragias Intracraneales , Escala de Coma de Glasgow , Estudios Retrospectivos , Centros Traumatológicos
16.
Development ; 149(17)2022 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-36098369

RESUMEN

Neurovascular unit and barrier maturation rely on vascular basement membrane (vBM) composition. Laminins, a major vBM component, are crucial for these processes, yet the signaling pathway(s) that regulate their expression remain unknown. Here, we show that mural cells have active Wnt/ß-catenin signaling during central nervous system development in mice. Bulk RNA sequencing and validation using postnatal day 10 and 14 wild-type versus adenomatosis polyposis coli downregulated 1 (Apcdd1-/-) mouse retinas revealed that Lama2 mRNA and protein levels are increased in mutant vasculature with higher Wnt/ß-catenin signaling. Mural cells are the main source of Lama2, and Wnt/ß-catenin activation induces Lama2 expression in mural cells in vitro. Markers of mature astrocytes, including aquaporin 4 (a water channel in astrocyte endfeet) and integrin-α6 (a laminin receptor), are upregulated in Apcdd1-/- retinas with higher Lama2 vBM deposition. Thus, the Wnt/ß-catenin pathway regulates Lama2 expression in mural cells to promote neurovascular unit and barrier maturation.


Asunto(s)
Vía de Señalización Wnt , beta Catenina , Animales , Ratones , Vía de Señalización Wnt/genética , beta Catenina/genética , beta Catenina/metabolismo
17.
Comput Biol Chem ; 99: 107696, 2022 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-35665656

RESUMEN

As the time elapsed by, the present real life problems have guided the human race towards a data driven society. This in turn caused an exponential hype of data generation globally that led to a new challenge for the human to store and manage such an enormous amount of data. It was further analysed through other research works that this is going to manufacture immense tension on the availability of silicon and magnetic memories in the near future. At this point in time, good data compression algorithms became the prime focus of the computing community. However, it was able to check the pace of the growing scarcity of data storage technologies but could not solve the problem from the root. As a result, it became a necessity to develop an efficient alternative data storage technology when the Nucleic Acid Memory (NAM) was brought forward as a promising solution. On the other hand, the research on expansion of the genetic alphabets beyond the standard nucleotides have emerged recently which have drawn a significant attention in the domain of biological science simultaneously. This led to the creation of the Extended Nucleic Acid Memory (ENAM). However, the initial proposals were put forward without considering the real life sequencing constraints namely the homopolymer runlength and the GC content constraint. But, it was observed in the literature that encoding techniques which accounted for countering the sequencing constraints had to pay a penalty in terms of digital data holding capacity per nucleotide. In this context, taking the inspiration from the domain of cryptography a new encoding algorithm namely the Cipher Constrained Encoding (CCE) has been proposed in this work which has the capability of considering both the sequencing constraints without significantly penalizing the data capacity per nucleotide. Few properties of the Vigenére and Vernam Cipher have been adapted and integrated with basic statistical analytical techniques which was very efficient in checking the violation of the sequencing constraints. Furthermore, experimentation has been done and the results have been reported and compared with the previous works found in the literature which demonstrated promising outcome.


Asunto(s)
Compresión de Datos , Ácidos Nucleicos , Algoritmos , Humanos , Nucleótidos
18.
ACS Biomater Sci Eng ; 8(6): 2654-2663, 2022 06 13.
Artículo en Inglés | MEDLINE | ID: mdl-35616246

RESUMEN

Effective hemorrhage control is indispensable for life-threatening emergencies in defense fields and civilian trauma. During major injuries, hemostatic agents are applied externally to mimic and accelerate the natural hemostasis process. Commercially available topical hemostatic agents are associated with several limitations, e.g., burning sensation, necrosis, futile in severe injuries, and high costs of the products. In the present study, we developed silk fibroin fiber-based formulations and evaluated their use as a cost-effective potential hemostatic agent with shortened clotting time. Silk fiber-based powder was produced following the alkaline hydrolysis process, wherein Bombyx mori silk fibroin fibers were treated with sodium hydroxide (NaOH) solution that randomly chopped the silk microfibers. Physicochemical reaction parameters, e.g., reaction temperature, molarity of NaOH solution, and incubation time, were optimized to achieve the maximum yield of microfibers. The surface properties of alkaline hydrolyzed silk microfibers (AHSMf) were analyzed by field emission scanning electron microscopy and energy dispersive X-ray studies. The water uptake capacity of AHSMf and the change in pH and temperature (∼30 °C) during blood clotting were analyzed. Further, the hemostatic potential of AHSMf was evaluated by an in vitro whole blood clotting assay using both goat and human blood. The in vitro studies demonstrated a reduced blood clotting time (CT = 20-30 s), prothrombin time (PT = ∼27%), and activated partial thromboplastin time (APTT = ∼14%) in the presence of AHSMf when compared to silk hydrogel powder (devoid of NaOH). Thus, the developed AHSMf could be a promising material to serve as a potential hemostatic agent.


Asunto(s)
Fibroínas , Hemostáticos , Fibroínas/química , Fibroínas/farmacología , Hemostáticos/química , Hemostáticos/farmacología , Polvos , Seda/química , Hidróxido de Sodio
19.
Am Surg ; 88(8): 1916-1918, 2022 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-35392678

RESUMEN

INTRODUCTION: This study aims to improve public health outreach in a high-risk population. METHODS: This is a single center study of Trauma Registry data, inclusive years January 1, 2016 to March 30, 2021. The study population was stratified into two groups: ETOH ≥ 80 mg/dL and ETOH <80 mg/dL. A total of 1141 were included. RESULTS: Those above the legal drinking limit had a significantly higher mean ETOH (231 mg/dL; P <.01) and were typically younger men that arrived by ground ambulance. The significant injury patterns of those above the legal limit included full activation and consults who fell from stairs and fell from other or unknown. A higher proportion of intoxicated fall trauma patients above the legal limit were diagnosed with a concussion. CONCLUSIONS: Excess alcohol consumption, particularly during a pandemic year, may lead to a higher incidence of fall from stairs trauma in men who are more likely to be diagnosed with a concussion.


Asunto(s)
Nivel de Alcohol en Sangre , Heridas y Lesiones , Consumo de Bebidas Alcohólicas/efectos adversos , Consumo de Bebidas Alcohólicas/epidemiología , Humanos , Incidencia , Masculino , Sistema de Registros , Factores de Riesgo , Heridas y Lesiones/diagnóstico , Heridas y Lesiones/epidemiología , Heridas y Lesiones/etiología
20.
J Trauma Acute Care Surg ; 93(3): 316-322, 2022 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-35234715

RESUMEN

BACKGROUND: The adverse impact of acute hyperglycemia is well documented but its specific effects on nondiabetic trauma patients are unclear. The purpose of this study was to analyze the differential impact of hyperglycemia on outcomes between diabetic and nondiabetic trauma inpatients. METHODS: Adults admitted 2018 to 2019 to 46 Level I/II trauma centers with two or more blood glucose tests were analyzed. Diabetes status was determined from International Classification of Diseases-10th Rev.-Clinical Modification, trauma registry, and/or hemoglobin A1c greater than 6.5. Patients with and without one or more hyperglycemic result >180 mg/dL were compared. Logistic regression examined the effects of hyperglycemia and diabetes on outcomes, adjusting for age, sex, Injury Severity Score, and body mass index. RESULTS: There were 95,764 patients: 54% male; mean age, 61 years; mean Injury Severity Score, 10; diabetic, 21%. Patients with hyperglycemia had higher mortality and worse outcomes compared with those without hyperglycemia. Nondiabetic hyperglycemic patients had the highest odds of mortality (diabetic: adjusted odds ratio, 3.11; 95% confidence interval, 2.8-3.5; nondiabetics: adjusted odds ratio, 7.5; 95% confidence interval, 6.8-8.4). Hyperglycemic nondiabetics experienced worse outcomes on every measure when compared with nonhyperglycemic nondiabetics, with higher rates of sepsis (1.1 vs. 0.1%, p < 0.001), more SSIs (1.0 vs. 0.1%, p < 0.001), longer mean hospital length of stay (11.4 vs. 5.0, p < 0.001), longer mean intensive care unit length of stay (8.5 vs. 4.0, p < 0.001), higher rates of intensive care unit use (68.6% vs. 35.1), and more ventilator use (42.4% vs. 7.3%). CONCLUSION: Hyperglycemia is associated with increased odds of mortality in both diabetic and nondiabetic patients. Hyperglycemia during hospitalization in nondiabetics was associated with the worst outcomes and represents a potential opportunity for intervention in this high-risk group. LEVEL OF EVIDENCE: Therapeutic/care management; Level III.


Asunto(s)
Diabetes Mellitus , Hiperglucemia , Glucemia , Diabetes Mellitus/epidemiología , Femenino , Humanos , Hiperglucemia/complicaciones , Puntaje de Gravedad del Traumatismo , Unidades de Cuidados Intensivos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Centros Traumatológicos
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA