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1.
Prehosp Emerg Care ; 26(4): 484-491, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-34232828

RESUMEN

Background: Research networks need access to EMS data to conduct pilot studies and determine feasibility of prospective studies. Combining data across EMS agencies is complicated and costly. Leveraging the National EMS Information System (NEMSIS) to extract select agencies' data may be an efficient and cost-effective method of providing network-level data. Objective: Describe the process of creating a Pediatric Emergency Care Applied Research Network (PECARN) specific NEMSIS data set and determine if these data were nationally representative. Methods: We established data use agreements (DUAs) with EMS agencies participating in PECARN to allow for agency identification through NEMSIS. Using 2019 NEMSIS version 3.4.0 data for EMS events with patients 18 years old and younger, we compared PECARN NEMSIS data to national NEMSIS data. Analyzed variables were selected for their ability to characterize events. No statistical analyses were utilized due to the large sample, instead, differences of ±5% were deemed clinically meaningful. Results: DUAs were established for 19 EMS agencies, creating a PECARN data set with 305,188 EMS activations of which 17,478 (5.7%) were pediatric. Of the pediatric activations, 17,140 (98.1%) were initiated through 9-1-1 and 9,487 (55.4%) resulted in transport by the documenting agency. The national data included 36,288,405 EMS activations of which 2,152,849 (5.9%) were pediatric. Of the pediatric activations 1,704,141 (79.2%) were initiated through 9-1-1 and 1,055,504 (61.9%) were transported by the documenting agency. Age and gender distributions were similar between the two groups, but the PECARN-specific data under-represents Black and Latinx patients. Comparison of EMS provider primary impressions revealed that three of the five most common were similar with injury being the most prevalent for both data sets along with mental/behavioral health and seizure. Conclusion: We demonstrated that NEMSIS can be leveraged to create network specific data sets. PECARN's EMS data were similar to the national data, though racial/ethnic minorities and some primary impressions may be under-represented. Additionally, more EMS activations in PECARN study areas originated through 9-1-1 but fewer were transported by the documenting agency. This is likely related to the type of participating agencies, their ALS response level, and the diversity of the communities they serve.


Asunto(s)
Servicios Médicos de Urgencia , Adolescente , Niño , Servicios Médicos de Urgencia/métodos , Tratamiento de Urgencia , Humanos , Sistemas de Información , Estudios Prospectivos , Sistema de Registros
2.
Vet Surg ; 51(4): 611-619, 2022 May.
Artículo en Inglés | MEDLINE | ID: mdl-35257394

RESUMEN

OBJECTIVE: To describe the clinical characteristics, perioperative protocols, and outcomes in dogs diagnosed with ventricular fibrillation (VF) while undergoing pericardiectomy. STUDY DESIGN: Retrospective, multi-institutional study. ANIMALS: Sixteen client-owned dogs. METHODS: Cases were accrued through a listserve request posted to 3 subspecialty veterinary societies. Dogs were included if they developed VF during a pericardiectomy performed through an open or thoracoscopic approach. Data collected included signalment, history and physical examination, surgical approach, histopathology, treatment, and outcome. RESULTS: Indications for pericardiectomy included idiopathic chylothorax (n = 7), neoplasia (4), idiopathic pericardial effusion (4), and foreign body granuloma (1). Surgical approaches included thoracoscopy (12), intercostal thoracotomy (3) and median sternotomy (1). Electrosurgical devices were used to complete at least part of the pericardiectomy in 15 of 16 dogs. Ventricular fibrillation appeared to be initiated during electrosurgical use in 8/15 dogs. However, in 5/15 dogs it was not obviously associated with electrosurgical use. In 3/16 dogs the timing of initiation of VF was unclear. In 7/16 dogs, cardiac arrhythmias were noted prior to the development of VF. Fourteen of 16 dogs died from intraoperative VF. CONCLUSION: In most dogs ventricular fibrillation was a fatal complication of pericardiectomy. Ventricular fibrillation might be associated with the use of electrosurgical devices and cardiac manipulation during pericardiectomy although a causal link could not be established from the data in this study. CLINICAL SIGNIFICANCE: Surgeons must be aware of the risk of VF during pericardial surgery. Electrosurgery might need to be used judiciously during pericardiectomy, particularly in dogs exhibiting cardiac arrythmias.


Asunto(s)
Enfermedades de los Perros , Pericardiectomía , Animales , Arritmias Cardíacas/complicaciones , Arritmias Cardíacas/veterinaria , Enfermedades de los Perros/etiología , Enfermedades de los Perros/cirugía , Perros , Pericardiectomía/efectos adversos , Pericardiectomía/métodos , Pericardiectomía/veterinaria , Estudios Retrospectivos , Fibrilación Ventricular/complicaciones , Fibrilación Ventricular/veterinaria
3.
BMC Med Educ ; 19(1): 446, 2019 Dec 02.
Artículo en Inglés | MEDLINE | ID: mdl-31791314

RESUMEN

BACKGROUND: Resident competence in peri-operative care is a reflection on education and cost-efficiency. Inspecting pre-existing operating room metrics for performance outliers may be a potential solution for assessing competence. Statistical correlation of problematic benchmarks may reveal future opportunities for educational intervention. METHODS: Case-log database review yielded 3071 surgical cases involving residents over the course of 5 years. Surgery anticipated and actual start times were evaluated for delays and residents were assessed using the days of resident training performed at the time of each corresponding case. Other variables recorded included day of week, attending anesthesiologist name, attending surgeon name, patient age, sex, American Society of Anesthesiologists physical status classification (ASA PS), and in-patient versus day surgery status. Mixed-effect, multi-variable, linear regression determined independent determinants of delay time. RESULTS: The analysis identified day of the week (F = 25.65, P < 0.0001), days of training (F = 8.39, P = 0.0038), attending surgeon (F = 2.67, P < 0.0001), and anesthesiology resident (F = 1.67, P = 0.0012) as independent predictors of delay time for first-start cases, with an overall regression model F = 3.09, r2 = 0.186, and P < 0.0001. CONCLUSIONS: The day of the week and attending surgeon demonstrated significant impact of case delay compared to resident days trained. If a learning curve for first-case start punctuality exists for anesthesiology residents, it is subtle and irrelevant to operating room efficiency. The regression model accounted for only 19% of the variability in the outcome of delay time, indicating a multitude of additional unidentified factors contributing to operating room efficiency.


Asunto(s)
Competencia Clínica/normas , Internado y Residencia/normas , Quirófanos/normas , Adolescente , Adulto , Anciano , Competencia Clínica/estadística & datos numéricos , Femenino , Humanos , Internado y Residencia/estadística & datos numéricos , Modelos Lineales , Masculino , Persona de Mediana Edad , Quirófanos/estadística & datos numéricos , Tempo Operativo , Estudios Retrospectivos , Procedimientos Quirúrgicos Operativos/normas , Procedimientos Quirúrgicos Operativos/estadística & datos numéricos , Análisis de Sistemas , Factores de Tiempo , Adulto Joven
4.
Vet Surg ; 48(3): 309-314, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-30663081

RESUMEN

OBJECTIVE: To determine the outcome and prognostic variables associated with long-term survival and complications in dogs undergoing hepatic lobectomy of the central division. STUDY DESIGN: Multi-institutional retrospective case series. ANIMALS: Sixty-one client-owned dogs with central division masses. METHODS: Medical records of dogs undergoing hepatic lobectomy of the central division from January 1, 2000 to January 1, 2015 were reviewed for signalment, clinical signs, preoperative staging, preoperative cytology or biopsy results, date of procedure, location of mass, surgical technique, whether cholecystectomy or cholecystopexy was performed, complications, histopathologic diagnosis and margin evaluation, date of local recurrence or detection of metastatic disease, and survival. RESULTS: Hilar resection was associated with increased intraoperative and postoperative complications. Intraoperative complications occurred in 29 dogs, with 20 dogs experiencing intraoperative hemorrhage. Nineteen dogs required transfusions. Immediate postoperative complications occurred in 20 dogs. Perioperative mortality rate was 11%, and 2-week mortality rate was 14.7%. The median survival time for dogs with hepatocellular carcinoma (HCC) was not reached. The 1- and 3-year censored survival rates for dogs with HCC was 82.1% and 82.1%, respectively. Margin status did not impact survival time. CONCLUSION: Hepatic lobectomy of the central division was associated with hemorrhage in approximately 33% of dogs, but there was a relatively low perioperative mortality rate. Hepatic lobectomy for HCC resulted in long-term survival, regardless of margin status. CLINICAL SIGNIFICANCE: Surgeons should anticipate the requirement for blood products in dogs that may require hepatic lobectomy of the central division. Long-term survival can be expected after surgical treatment of HCC, regardless of margin status.


Asunto(s)
Carcinoma Hepatocelular/veterinaria , Enfermedades de los Perros/cirugía , Neoplasias Hepáticas/veterinaria , Hígado/cirugía , Animales , Carcinoma Hepatocelular/cirugía , Perros , Femenino , Complicaciones Intraoperatorias/veterinaria , Neoplasias Hepáticas/cirugía , Masculino , Recurrencia Local de Neoplasia/cirugía , Recurrencia Local de Neoplasia/veterinaria , Complicaciones Posoperatorias/veterinaria , Estudios Retrospectivos , Procedimientos Quirúrgicos Operativos/veterinaria , Tasa de Supervivencia , Resultado del Tratamiento
5.
J Anaesthesiol Clin Pharmacol ; 35(Suppl 1): S29-S34, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-31142956

RESUMEN

Improvement in patient outcomes has become a significant consideration with our limited resources in the surgical setting. The implementation of enhanced recovery pathway protocols has resulted in significant benefits to both the patients and hospitals, such as shorter length of hospital stays, reduction in the rate of complications, and fewer hospital readmissions. An emerging component and a key element for the success of Enhanced Recovery After Surgery (ERAS) protocols has been the concept of goal-directed fluid therapy (GDT). GDT related to ERAS protocols attempts to minimize complications associated with fluid imbalance during surgery. We performed a literature search for articles that included the terms enhanced recovery and GDT. We evaluated methods for appropriate volume status assessment, such as heart rate, blood pressure, end-tidal CO2, central venous pressure, urine output, stroke volume, cardiac output, and their derivatives. Some invasive, minimally invasive, and non-invasive monitors of hemodynamic evaluation are now being used to assess volume status and predict fluid responsiveness and fluid need during various surgical procedures. Regardless of monitoring technique, it is important for the clinician to effectively plan and implement preoperative and intraoperative fluid goals. Excess crystalloid fluid should be avoided. In some low-risk patients undergoing low-risk surgery, a "zero-balance" approach is encouraged. For the majority of patients undergoing major surgery, GDT is recommended. Optimal perioperative fluid management is an important component of the ERAS pathways and it can reduce postoperative complications.

6.
BMC Genet ; 19(1): 39, 2018 06 26.
Artículo en Inglés | MEDLINE | ID: mdl-29940858

RESUMEN

BACKGROUND: Anterior cruciate ligament rupture (ACLR) is a debilitating and potentially life-changing condition in humans, as there is a high prevalence of early-onset osteoarthritis after injury. Identification of high-risk individuals before they become patients is important, as post-treatment lifetime burden of ACLR in the USA ranges from $7.6 to $17.7 billion annually. ACLR is a complex disease with multiple risk factors including genetic predisposition. Naturally occurring ACLR in the dog is an excellent model for human ACLR, as risk factors and disease characteristics in humans and dogs are similar. In a univariate genome-wide association study (GWAS) of 237 Labrador Retrievers, we identified 99 ACLR candidate loci. It is likely that additional variants remain to be identified. Joint analysis of multiple correlated phenotypes is an underutilized technique that increases statistical power, even when only one phenotype is associated with the trait. Proximal tibial morphology has been shown to affect ACLR risk in both humans and dogs. In the present study, tibial plateau angle (TPA) and relative tibial tuberosity width (rTTW) were measured on bilateral radiographs from purebred Labrador Retrievers that were recruited to our initial GWAS. We performed a multivariate genome wide association analysis of ACLR status, TPA, and rTTW. RESULTS: Our analysis identified 3 loci with moderate evidence of association that were not previously associated with ACLR. A locus on Chr1 associated with both ACLR and rTTW is located within ROR2, a gene important for cartilage and bone development. A locus on Chr4 associated with both ACLR and TPA resides within DOCK2, a gene that has been shown to promote immune cell migration and invasion in synovitis, an important predictor of ACLR. A third locus on Chr23 associated with only ACLR is located near a long non-coding RNA (lncRNA). LncRNA's are important for regulation of gene transcription and translation. CONCLUSIONS: These results did not overlap with our previous GWAS, which is reflective of the different methods used, and supports the need for further work. The results of the present study are highly relevant to ACLR pathogenesis, and identify potential drug targets for medical treatment.


Asunto(s)
Lesiones del Ligamento Cruzado Anterior/genética , Animales , Perros , Sitios Genéticos , Predisposición Genética a la Enfermedad , Estudio de Asociación del Genoma Completo/métodos , Humanos , Modelos Animales
7.
BMC Med Educ ; 18(1): 295, 2018 Dec 05.
Artículo en Inglés | MEDLINE | ID: mdl-30518428

RESUMEN

BACKGROUND: Operating room (OR) metrics are frequently cited when optimizing cost efficacy and quality of care (Weiss et al, Characteristics of operating room procedures in U.S. hospitals, 2011: Statistical brief #170, 2013; Macario A, Anesthesiology 105:237-240, 2006; Childers et al, JAMA Surg 153:e176233, 2018). Little has been reported to evaluate how anesthesia trainees change anesthesia-related efficiencies in the OR. Statistical correlation may demonstrate awareness and implementation of efficient systems-based practice. METHODS: Utilizing computerized OR information systems, specific data regarding anesthesia controlled turnover times were collected (546 data points) over the course of 4 months. The type of surgery performed, patient's American Society of Anesthesiologists (ASA) physical status and OR turnover times were compared for clinical anesthesia (CA) trainee levels CA1, CA2, CA3 and CRNAs. Standard descriptive statistics were computed. Analysis of variance (ANOVA) was performed to compare the average turnover time. RESULTS: Average OR turnover time was 31 min ranging from 8 to 60 min. There was a significant difference between the OR turnover time of CA-1 (32 min) compared to CA-3 (29 min) (p = 0.017) and CA-1 compared to CRNA (30 min) (p = 0.016). OR turnover time was significantly shorter in CA-3 and CRNA. The analysis showed no differences between OR turnover time of ASA categories. CONCLUSIONS: These findings posit that trainees improve efficiency over time, but that education may for a time come at the expense of productivity. This trend may demonstrate a more profound understanding and mastery of a learner progressing in the graduate medical education system. This interplay plays a key role in clinical and academic shared success.


Asunto(s)
Anestesiología/educación , Eficiencia Organizacional , Quirófanos/organización & administración , Calidad de la Atención de Salud/normas , Administración del Tiempo/organización & administración , Educación Basada en Competencias , Análisis Costo-Beneficio , Humanos , Análisis de Sistemas , Factores de Tiempo
8.
Chemistry ; 22(31): 10743-7, 2016 Jul 25.
Artículo en Inglés | MEDLINE | ID: mdl-27253350

RESUMEN

Both known and new CC3-based porous organic cages are prepared and exposed to acidic SO2 in vapor and liquid conditions. Distinct differences in the stability of the CC3 cages exist depending on the chirality of the diamine linkers used. The acid catalyzed CC3 degradation mechanism is probed via in situ IR and a degradation pathway is proposed and supported with computational results. CC3 crystals synthesized with racemic mixtures of diaminocyclohexane exhibited enhanced stability compared to CC3-R and CC3-S. Confocal fluorescent microscope images reveal that the stability difference in CC3 species originates from an abundance of mesoporous grain boundaries in CC3-R and CC3-S, allowing facile access of aqueous SO2 throughout the crystal, promoting decomposition. These grain boundaries are absent from CC3 crystals made with racemic linkers.

9.
J Org Chem ; 78(22): 11590-6, 2013 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-24116701

RESUMEN

A general method for the gram scale resolution of 2-substituted and 2,8-disubstituted Tröger's base (TB) derivatives in 63-91% yield has been achieved through the application of crystallization-induced asymmetric transformation (CIAT). Enantiomeric ratios of the resolved TB derivatives range from 99.1:0.9 to >99.5:0.5. Among the Tröger's base compounds resolved are four synthetically valuable bromo and iodo derivatives.

10.
Nucleic Acids Res ; 39(1): e5, 2011 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-20959287

RESUMEN

Bisulfite sequencing is a widely-used technique for examining cytosine DNA methylation at nucleotide resolution along single DNA strands. Probing with cytosine DNA methyltransferases followed by bisulfite sequencing (MAPit) is an effective technique for mapping protein-DNA interactions. Here, MAPit methylation footprinting with M.CviPI, a GC methyltransferase we previously cloned and characterized, was used to probe hMLH1 chromatin in HCT116 and RKO colorectal cancer cells. Because M.CviPI-probed samples contain both CG and GC methylation, we developed a versatile, visually-intuitive program, called MethylViewer, for evaluating the bisulfite sequencing results. Uniquely, MethylViewer can simultaneously query cytosine methylation status in bisulfite-converted sequences at as many as four different user-defined motifs, e.g. CG, GC, etc., including motifs with degenerate bases. Data can also be exported for statistical analysis and as publication-quality images. Analysis of hMLH1 MAPit data with MethylViewer showed that endogenous CG methylation and accessible GC sites were both mapped on single molecules at high resolution. Disruption of positioned nucleosomes on single molecules of the PHO5 promoter was detected in budding yeast using M.CviPII, increasing the number of enzymes available for probing protein-DNA interactions. MethylViewer provides an integrated solution for primer design and rapid, accurate and detailed analysis of bisulfite sequencing or MAPit datasets from virtually any biological or biochemical system.


Asunto(s)
Islas de CpG , ADN (Citosina-5-)-Metiltransferasas/metabolismo , Metilación de ADN , Análisis de Secuencia de ADN/métodos , Programas Informáticos , Sulfitos/química , Proteínas Adaptadoras Transductoras de Señales/genética , Línea Celular Tumoral , Cromatina/metabolismo , Biología Computacional , Citidina/análisis , Citidina/metabolismo , Citosina/metabolismo , ADN/química , Humanos , Aumento de la Imagen , Homólogo 1 de la Proteína MutL , Proteínas Nucleares/genética , Alineación de Secuencia
13.
Bull Hosp Jt Dis (2013) ; 81(3): 163-167, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37639343

RESUMEN

PURPOSE: Both limited-open and percutaneous techniques have been described for retrograde insertion of intramedullary metacarpal screws. The percutaneous approach does not allow direct visualization of the starting point at the metacarpal head. However, it limits soft tissue dissection and expedites the procedure. The purpose of our study was to determine whether percutaneous, retrograde intramedullary screw fixation causes substantial iatrogenic damage to the extensor tendon. We also investigated whether larger sized screws would cause greater tendon injury compared to smaller screws. METHODS: Eight fresh frozen cadaver hands were used for percutaneous, retrograde intramedullary screw insertion of the index, long, ring, and small finger metacarpals of each specimen. Three different types of headless compression screws were used: a small fully threaded screw, a large fully threaded screw, and a Herbert-style partially threaded screw. After insertion, dissection was carried down to the screw entry site. Extensor tendon damage was evaluated, including tendon defect size and any irregularities noted in the tendon. RESULTS: There was no statistical difference with respect to how frequently a screw perforated the extensor tendons between all four finger metacarpals. Overall, the defect width caused by the screw was minimal, ranging from 0.66 mm to 1.89 mm for all finger and screw types. The large style screw did cause the greatest mean defect width, however, this was not statistically significant. When normalized to total tendon width, the defect was less than 28% of the total tendon width, with an average of 20% for all finger and screw types. Upon gross inspection, there was no fraying or irregularity noted at the screw-tendon insertion site, and it was often difficult to identify the screw entry site through the tendon by direct visualization alone. No tendon ruptures were noted. CONCLUSIONS: This study found that percutaneous insertion of a retrograde, intramedullary metacarpal screw causes minimal extensor tendon injury. In contrast to the limited-open approach, the percutaneous technique requires less soft tissue dissection and the possibility of reduced swelling, scarring, and risk of adhesions. Moreover, it has the potential to allow for early functional rehabilitation and reduced operative time. Interestingly, none of the tendons demonstrated fraying or rupture, as one might expect to occur with blind passage of a drill and screw through a tendon. Overall, the percutaneous, retrograde intramedullary screw technique appears to cause minimal iatrogenic injury to the extensor tendon.


Asunto(s)
Huesos del Metacarpo , Traumatismos de los Tendones , Humanos , Huesos del Metacarpo/diagnóstico por imagen , Huesos del Metacarpo/cirugía , Tendones/diagnóstico por imagen , Tendones/cirugía , Traumatismos de los Tendones/diagnóstico por imagen , Traumatismos de los Tendones/etiología , Traumatismos de los Tendones/cirugía , Tornillos Óseos , Enfermedad Iatrogénica
14.
Biomimetics (Basel) ; 8(1)2023 Feb 12.
Artículo en Inglés | MEDLINE | ID: mdl-36810410

RESUMEN

Microbially-induced corrosion is the acceleration of corrosion induced by bacterial biofilms. The bacteria in the biofilms oxidize metals on the surface, especially evident with iron, to drive metabolic activity and reduce inorganic species such as nitrates and sulfates. Coatings that prevent the formation of these corrosion-inducing biofilms significantly increase the service life of submerged materials and significantly decrease maintenance costs. One species in particular, a member of the Roseobacter clade, Sulfitobacter sp., has demonstrated iron-dependent biofilm formation in marine environments. We have found that compounds that contain the galloyl moiety can prevent Sulfitobacter sp. biofilm formation by sequestering iron, thus making a surface unappealing for bacteria. Herein, we have fabricated surfaces with exposed galloyl groups to test the effectiveness of nutrient reduction in iron-rich media as a non-toxic method to reduce biofilm formation.

15.
J Vet Emerg Crit Care (San Antonio) ; 32(1): 98-105, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-34555866

RESUMEN

OBJECTIVE: To evaluate preoperative diagnostics in dogs with gastrointestinal foreign body (GIFB) obstruction and to identify clinical variables associated with the performance of simple enterotomy (EO) versus enterectomy (EC). DESIGN: Retrospective case control study from October 2013 to January 2016. SETTING: Veterinary Teaching Hospital. ANIMALS: Eighty-two client-owned dogs diagnosed at the time of surgery with GIFB obstruction. MEASUREMENTS AND MAIN RESULTS: Data were collected from medical records regarding history, initial physical examination, clinicopathologic testing, diagnostic imaging, and surgical reports. Based on univariate analysis, dogs that required EC were ill (P < 0.0001) and anorexic (P = 0.0007) for a longer duration; had a higher vomiting severity score (P = 0.005); and had worse perfusion parameters (mucous membrane color [P = 0.028] and quality [P = 0.032], poorer pulse quality [P = 0.0015], relatively lower blood pressure [P = 0.0328], greater heart rates [P = 0.0011]). Dogs undergoing EC were more likely to have altered peritoneal detail on radiographs (P = 0.0014; odds ratio [OR] = 25.5; 95% confidence interval [CI]: 2.4, 275.7) and echogenic peritoneal effusion on ultrasound (P = 0.0101; OR = 12.5; 95% CI: 1.3, 120.9), compared to the EO group. Heart rate (adjusted P = 0.028; OR = 1.07; 95% CI: 1.0, 1.1) and vomiting severity score (adjusted P = 0.028; OR = 5.6; 95% CI: 1.2, 26.1) maintained significance after multiple logistic regression. CONCLUSIONS: Multiple factors in the preoperative clinical evaluation were different between dogs undergoing EO versus EC for GIFB obstruction. However, many of these variables become insignificant with multiple logistic regression. The presence of an increased heart rate or increased vomiting severity score at presentation was independently associated with undergoing enterectomy. Prospective studies with greater number of animals are warranted to validate these results.


Asunto(s)
Enfermedades de los Perros , Cuerpos Extraños , Animales , Estudios de Casos y Controles , Enfermedades de los Perros/diagnóstico , Enfermedades de los Perros/cirugía , Perros , Cuerpos Extraños/cirugía , Cuerpos Extraños/veterinaria , Hospitales Veterinarios , Hospitales de Enseñanza , Estudios Prospectivos , Estudios Retrospectivos
16.
J Am Chem Soc ; 133(21): 8165-7, 2011 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-21534526

RESUMEN

An efficient molybdenum-catalyzed asymmetric allylic alkylation (Mo-AAA) of cyanoester nucleophiles is reported. A number of highly functionalized branched cyanoesters containing a quaternary carbon stereocenter with a vicinal tertiary stereocenter are obtained. This method generates a number of functionalized cyanoesters in excellent yield and chemoselectivity in good to excellent diastereoselectivity and enantioselectivity.

17.
Case Rep Anesthesiol ; 2021: 9945225, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34691786

RESUMEN

Unfractionated heparin is the anticoagulant of choice for cardiac surgery that requires cardiopulmonary bypass. However, it can cause serious side effects like heparin-induced thrombocytopenia (HIT), an immune-mediated process where antibodies are directed against heparin and platelet 4 complexes. In such cases, alternative pharmacologic strategies are implemented to facilitate safe bypass conditions. A woman with severe decompensated heart failure was heparinized for intra-aortic balloon pump and subsequent LVAD placement. On day 6, a fall in platelets from 113,000 to 26,000 was noted. She was diagnosed with HIT. Heparin was discontinued and replaced with an argatroban infusion for the duration of her care until heart transplantation was completed. We review the mechanism, diagnosis, and complications of HIT. We discuss cardiopulmonary bypass and its relation to heparin, HIT, and heparin alternatives. We discuss argatroban's relevant pharmacology, clinical use, advantages, and disadvantages.

18.
Arch Bone Jt Surg ; 9(4): 432-438, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-34423093

RESUMEN

BACKGROUND: Computer assisted three-dimensional (3D) printing of anatomic models using advanced imaging has wide applications within orthopaedics. The purpose of this study is to evaluate the 3D printing accuracy of carpal bones. METHODS: Seven cadaveric wrists underwent CT scanning, after which select carpal bones (scaphoid, capitate, lunate, and trapezium) were dissected in toto. Dimensions including length, circumference, and volume were measured directly from the cadaver bones. The CT images were converted into 3D printable stereolithography (STL) files. The STL files were converted into solid prints using a commercially available 3D printer. The 3D printed models' dimensions were measured and compared to those of the cadaver bones. A paired t-test was performed to determine if a statistically significant difference existed between the mean measurements of the cadavers and 3D printed models. The intraclass correlation coefficients (ICC) between the two groups were calculated to measure the degree of agreement. RESULTS: On average, the length and circumference of the 3D printed models were within 2.3 mm and 2.2 mm, respectively, of the cadaveric bones. There was a larger discrepancy in the volume measured, which on average was within 0.65 cc (15.9%) of the cadaveric bones. These differences were not statistically significant (P > 0.05). There was strong agreement between all measurements except the capitate's length and lunate's volume. CONCLUSION: 3D printing can add value to patient care and improve outcomes. This study demonstrates that 3D printing can both accurately and reproducibly fabricate boney models that closely resemble the corresponding cadaveric anatomy.

19.
J Educ Perioper Med ; 22(4): E651, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33447650

RESUMEN

INTRODUCTION: Anesthesia residents are deemed competent based on subjective and objective metrics. Knowledge acquisition and procedural skill is often difficult to accurately measure. Inspecting tangible metrics of perioperative efficiency may provide a source for reliable evaluation. METHODS: Retrospective case-log database review yielded 3072 surgical cases involving residents over 5 years. Primary variable investigated was the time from surgery completion to exit from operating room. Other variables recorded included day of week, attending anesthesiologist name, attending surgeon name, patient age, sex, American Society of Anesthesiologists physical status (ASA PS) classification, and inpatient versus day surgery status. RESULTS: After controlling for procedure duration time, inpatient status, ASA PS, surgeon, and attending anesthesiologist, resident training time had high statistical significance. In the fully adjusted model, 1 year of resident training was associated with a reduction in emergence time by 28 seconds. A 1-hour increase in procedure time was associated with an increase in emergence time of 34 seconds. CONCLUSIONS: Although a statistically significant correlation between anesthesia resident training time and emergence time was demonstrated, the clinical significance is likely low given the relatively small amount of actual time saved. We caution the value of using perioperative metrics (e.g., emergence time) for evaluating anesthesia resident competency, until such metrics have undergone significant validation.

20.
Braz J Anesthesiol ; 69(6): 622-625, 2019.
Artículo en Portugués | MEDLINE | ID: mdl-31784196

RESUMEN

BACKGROUND: Sepsis is a life-threatening organ dysfunction with non-specific clinical features that can mimic other clinical conditions with hyper metabolic state such as malignant hyperthermia. Perioperatively anesthesia providers come across such scenarios, which are extremely challenging with the need for urgent intervention. OBJECTIVE: To illustrate the need for early intervention and consultation for added assistance to approach and rule out malignant hyperthermia and other possible causes during such a scenario. CASE REPORT: A 63-year-old male underwent an uneventful elective flexible cystoscopy and transrectal ultrasound-guided prostate biopsy. Postoperatively he developed symptoms raising suspicion for malignant hyperthermia. Immediately malignant hyperthermia protocol was initiated that included administration of dantrolene and consultation of malignant hyperthermia association hotline along with other diagnostic and interventional management aimed at patient optimization. While early administration of dantrolene helped in hemodynamically stabilizing the patient, the consultation with other providers and malignant hyperthermia association hotline along with repeated examinations and lab works helped in ruling out malignant hyperthermia as the possible diagnosis. The patient later recovered in the intensive care unit where he was treated for the bacteremia that grew in his blood cultures. CONCLUSIONS: Sepsis shares clinical symptoms that mimic malignant hyperthermia. While sepsis rapidly progresses to secondary injuries, malignant hyperthermia is life threatening. Providing ideal care requires good clinical judgment and a high level of suspicion where timely and appropriate care such as early administration of dantrolene and consultation of malignant hyperthermia association hotline for added assistance can influence positive outcomes.


Asunto(s)
Hipertermia Maligna/diagnóstico , Complicaciones Posoperatorias/diagnóstico , Sepsis/diagnóstico , Enfermedad Aguda , Cistoscopía/métodos , Dantroleno/administración & dosificación , Humanos , Biopsia Guiada por Imagen/métodos , Masculino , Hipertermia Maligna/fisiopatología , Persona de Mediana Edad , Complicaciones Posoperatorias/fisiopatología , Complicaciones Posoperatorias/terapia , Sepsis/fisiopatología , Sepsis/terapia , Factores de Tiempo
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