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Since 2007, the Oncofertility Consortium Annual Conference has brought together a diverse network of individuals from a wide range of backgrounds and professional levels to disseminate emerging basic and clinical research findings in fertility preservation. This network also developed enduring educational materials to accelerate the pace and quality of field-wide scientific communication. Between 2007 and 2019, the Oncofertility Consortium Annual Conference was held as an in-person event in Chicago, IL. The conference attracted approximately 250 attendees each year representing 20 countries around the world. In 2020, however, the COVID-19 pandemic disrupted this paradigm and precluded an in-person meeting. Nevertheless, there remained an undeniable demand for the oncofertility community to convene. To maintain the momentum of the field, the Oncofertility Consortium hosted a day-long virtual meeting on March 5, 2021, with the theme of "Oncofertility Around the Globe" to highlight the diversity of clinical care and translational research that is ongoing around the world in this discipline. This virtual meeting was hosted using the vFairs ® conference platform and allowed over 700 people to participate, many of whom were first-time conference attendees. The agenda featured concurrent sessions from presenters in six continents which provided attendees a complete overview of the field and furthered our mission to create a global community of oncofertility practice. This paper provides a synopsis of talks delivered at this event and highlights the new advances and frontiers in the fields of oncofertility and fertility preservation around the globe from clinical practice and patient-centered efforts to translational research.
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COVID-19 , Preservación de la Fertilidad , Neoplasias , COVID-19/epidemiología , Humanos , PandemiasRESUMEN
This manuscript introduces BITTSy, the Behavioral Infant & Toddler Testing System. This software system is capable of running the headturn preference procedure, preferential looking, conditioned headturn, and visual fixation/habituation procedures. It uses only commercial-off-theshelf (COTS) hardware to implement the procedures in an affordable and space-efficient setup. The software package, example protocols and data sets, and manual are freely available and downloadable from go.umd.edu/BITTSy, making this entire set of procedures available to resource-limited labs. Researchers can easily use BITTSy at multiple sites in a uniform manner, resulting in a standardized, powerful research tool that can enhance cross-site research collaborations.
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Fijación Ocular , Programas Informáticos , Preescolar , Computadores , Humanos , LactanteRESUMEN
AIM: The use of minimally invasive colorectal surgery has increased greatly for both benign and malignant disease. Studies evaluating complex procedures have been largely limited to elective indications. We aimed to compare the outcome of a laparoscopic with an open transverse (TC) and total abdominal colectomy (TAC) in the nonelective setting. METHOD: Comparative analysis was made using the Nationwide Inpatient Sample (2008-11) of patients undergoing a nonelective TC or TAC identified by ICD-9-CM procedure codes. The risk-adjusted 30-day outcome was assessed using regression modelling accounting for patient characteristics, comorbidity and surgical procedure. RESULTS: We identified 7261 admissions including 818 laparoscopic and 6443 open procedures. The mean age of the population was 65 ± 17 years and patients in the laparoscopic group were younger (56 ± 20 vs. 66 ± 17 years; P < 0.05). The rate of a single complication was lower in the laparoscopic group (26% vs. 38%; P < 0.01), but this did not remain significant following a logistic regression analysis. Mortality was significantly lower in the laparoscopic group (3.1% vs. 17%; P < 0.01) and this remained true after adjusting for covariates (OR = 0.62; P < 0.05). Laparoscopic cases were associated with a shorter median length of stay (10 vs. 13 days; P < 0.01) and hospital charge ($75,758 vs. $98,833; P < 0.01). CONCLUSION: A nonelective laparoscopic TC or TAC is associated with an equivalent complication rate and lower mortality compared with an open operation. The results should encourage surgeons with the appropriate skills to consider a laparoscopic approach for nonelective pathology requiring a complex colectomy.
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Enfermedades del Colon/cirugía , Procedimientos Quirúrgicos del Sistema Digestivo/estadística & datos numéricos , Laparoscopía/estadística & datos numéricos , Abdomen/cirugía , Adulto , Anciano , Colon/cirugía , Procedimientos Quirúrgicos del Sistema Digestivo/métodos , Femenino , Humanos , Laparoscopía/métodos , Masculino , Persona de Mediana Edad , Resultado del Tratamiento , Adulto JovenRESUMEN
AIM: Urgent colectomy for severe Clostridium difficile infection can be associated with increased morbidity and mortality. We aimed to use endoscopic methods for treatment. METHOD: We describe a technique of placing an intracolonic tube facilitating decompression and direct delivery of vancomycin to the proximal colon along with enemas on a regular and frequent basis that may not be possible with vancomycin enemas alone. RESULTS: Successful resolution of the C. difficile infection and avoidance of surgery. CONCLUSION: While further long-term evaluation is required, our initial results have shown it to be effective in treating select patients with recalcitrant Clostridium difficile-associated megacolon.
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Antibacterianos/uso terapéutico , Clostridioides difficile , Colonoscopía/métodos , Descompresión Quirúrgica/métodos , Enterocolitis Seudomembranosa/tratamiento farmacológico , Intubación Gastrointestinal/métodos , Megacolon/cirugía , Vancomicina/uso terapéutico , Administración Tópica , Enema , Enterocolitis Seudomembranosa/complicaciones , Humanos , Megacolon/etiologíaRESUMEN
PURPOSE: Two-Step Fowler-Stephens orchiopexy for high undescended testes allows for mobilization of the testicle to the scrotal position while preserving perfusion by collateral circulation after gonadal vessel ligation. Although used for decades, the long-term efficacy of this procedure has not been reported. We present our 28-year clinical experience with this technique. MATERIALS AND METHODS: We retrospectively studied a cohort of patients who underwent 2-step Fowler-Stephens orchiopexy at our institution between 1982 and 2009. Patients were excluded if either step was performed elsewhere or if followup was less than 6 months. Bivariate and multivariate analyses were performed to determine associations between clinical, surgical and anatomical factors and testicular viability at last followup. RESULTS: A total of 62 patients (79 testes) met inclusion criteria. Median followup was 3.1 years (range 0.6 to 20). Based on the most recent examination/ultrasound, 70.9% of testicles were considered to be normal, with the remainder exhibiting relative (15.2%) or complete (14.9%) atrophy. Of the 10 testes assessed at or after puberty 6 were normal and 4 showed relative atrophy. On bivariate and multivariate analyses only an open second stage approach was associated with normal testicular viability, with 69.9% of normal vs 18.9% of completely atrophic testes being managed by an open approach (p = 0.0084). CONCLUSIONS: Thought to be highly effective in short-term followup, our data suggest that 2-step Fowler-Stephens orchiopexy leads to complete testicular viability in 70.9% of cases. This viability is strongly associated with an open second step.
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Criptorquidismo/cirugía , Orquidopexia/métodos , Adolescente , Niño , Preescolar , Humanos , Lactante , Masculino , Estudios Retrospectivos , Factores de TiempoRESUMEN
INTRODUCTION: Federal grants from the National Institutes of Health (NIH) or Agency for Healthcare Research and Quality (AHRQ) are crucial for early career physician-scientists. Federal funding success has been explored in other surgical specialties, but has not been evaluated in pediatric urology. OBJECTIVE: To characterize factors associated with receipt of federal grants, hypothesizing that pediatric urologists who were have advanced research degree(s) were more likely to be federally funded. STUDY DESIGN: All pediatric fellowship graduates from 1985-2016 listed on the Societies for Pediatric Urology and institutional websites were queried using the NIH Research Portfolio Online Reporting Tools. Primary outcomes were successful receipt of federal grants and transition from mentor-based to independent funding. The secondary outcome was publication rate on PubMed as of November 2017. Covariables included advanced degree(s) (eg, PhD, MPH, MSc, etc), sex, and year of fellowship graduation (1985-2006 versus 2007-2016). RESULTS: Of 445 pediatric urologists (73% male), 36 (8%) were federal grant recipients. Of 18 mentor-based awardees, 9 (50%) transitioned to independent awards. After adjusting for sex and year of fellowship graduation, having an advanced degree(s) was associated with funding success for mentor-based awards (hazard ratio [HR] 3.83 [95% confidence interval, 1.21-12.14], p = 0.02; Summary Table) and independent awards (HR 3.11 [1.21-8.02], p = 0.02), and with higher publication rates (incident rate ratio [IRR] 2.03 [1.43-2.87], p < 0.001). Recent training (2007-2016) was also associated with higher publication rates (IRR 2.70 [2.16-3.37], p < 0.001). DISCUSSION: Among fellowship-trained pediatric urologists in North America between 1985 and 2016, the prevalence of federal grant recipients was 8%. Pediatric urologists who had an advanced educational degree were more likely to be a federally funded grant recipient and have a higher publication rate. CONCLUSIONS: Fellowship programs should consider adding opportunities for self-selected applicants to pursue additional research training and degrees.
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Investigación Biomédica/economía , Movilidad Laboral , Organización de la Financiación , Fallo Renal Crónico/cirugía , Trasplante de Riñón , Mentores , Urología/organización & administración , Adolescente , Adulto , Anciano , Niño , Preescolar , Femenino , Estudios de Seguimiento , Humanos , Lactante , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Tiempo , Donantes de Tejidos , Estados Unidos , Adulto JovenRESUMEN
INTRODUCTION: In 2006, nomenclature referencing atypical sex development (i.e., 'intersex') was updated, and the term disorder of sex development (DSD) was formally introduced. Clinicians, patients, and parents, however, have not universally accepted the new terminology, and some continue to use different nomenclature. This inconsistency in terminology can lead to confusion among clinicians and patients, affect clinician-patient relationships, and interfere with the recommended multidisciplinary model for DSD care. OBJECTIVE: This study sought to (1) evaluate frequency of use and comfort with specific DSD terminology, (2) assess why clinicians are not using specific terms, and (3) determine what terms are being heard within the medical community and by the public in a sample of physicians, genetic counselors, and licensed mental health clinicians. STUDY DESIGN: A Web-based survey assessing the use of DSD terminology was distributed to endocrinologists, urologists, genetic counselors, and mental health clinicians. The survey assessed frequency of use and comfort with specific terms, negative experiences related to specific nomenclature use, and the context in which terms are used (e.g. case conference, literature, patient/parents, and media). A qualitative analysis of open-ended responses was conducted to characterize reasons for avoiding specific terms. RESULTS: The survey was completed by 286 clinicians. There were significant differences between specialties in comfort and frequency of use of specific terms, and significant differences were based on clinician gender, patient volume, length of time in practice, and practice setting. The study results also showed a difference in the nomenclature used within the medical community versus the media. DISCUSSION: Study findings are consistent with previous research exploring medical professionals' use of the new term: disorder of sex development. However, there continues to be inconsistency in the uptake of this new terminology. Words that have been purposed in the literature to replace disorder, such as difference and variation, would be accepted by clinicians, and the word divergent would not. This study expands on the existing literature documenting high uptake of disorder of sex development nomenclature among medical professionals. In addition, this study demonstrates that the most common diagnostic terms used by the medical community are not the same terms being presented to the public by the media. CONCLUSION: Medical professionals have varying preferences for terminology use when describing DSD, which can affect patient care. These results can be used in the future to compare with what patients and advocates prefer to develop a more universally accepted approach to nomenclature.
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Actitud del Personal de Salud , Trastornos del Desarrollo Sexual , Terminología como Asunto , Adulto , Anciano , Femenino , Asesoramiento Genético , Humanos , Masculino , Persona de Mediana Edad , Médicos , PsicologíaRESUMEN
BACKGROUND: Reported rates of post-procedural urinary tract infection (ppUTI) after voiding cystourethrogram (VCUG) are highly variable (0-42%). OBJECTIVE: This study aimed to determine the risk of ppUTI after cystogram, and evaluate predictors of ppUTI. STUDY DESIGN: A retrospective cohort study of children undergoing VCUG or radionuclide cystogram (henceforth 'cystogram') was conducted. Children with neurogenic bladder who underwent cystogram in the operating room and without follow-up at the study institution were excluded. Incidence of symptomatic ppUTI within 7 days after cystogram was recorded. Predictors of ppUTI were evaluated using univariate statistics. RESULTS: A total of 1108 children (54% female, median age 1.1 years) underwent 1203 cystograms: 51% were on periprocedural antibiotics, 75% had a pre-existing urologic diagnosis (i.e., vesicoureteral reflux (VUR) or hydronephrosis; not UTI alone), and 18% had a clinical UTI within 30 days before cystogram. Of the cystograms, 41% had an abnormal cystogram and findings included VUR (82%), ureterocele (6%), and diverticula (6%). Twelve children had a ppUTI (1.0%; four girls, five uncircumcised boys, three circumcised boys; median age 0.9 years). Factors significantly associated with diagnosis of a ppUTI (Summary fig.) included: pre-existing urologic diagnosis prior to cystogram (12/12, 100% of patients with ppUTI), abnormal cystogram results (11/12, 92%), and use of periprocedural antibiotics (11/12, 92%). All 11 children with an abnormal cystogram had VUR ≥ Grade III. However, among all children with VUR ≥ Grade III, 4% (11/254) had a ppUTI. DISCUSSION: This is the largest study to date that has examined incidence and risk factors for ppUTI after cystogram. The retrospective nature of the study limited capture of some clinical details. This study demonstrated that the risk of ppUTI after a cystogram is very low (1.0% in this cohort). Having a pre-existing urologic diagnosis such as VUR or hydronephrosis was associated with ppUTI; therefore, children with moderate or high-grade VUR on cystogram may be at highest risk. Development of ppUTI after cystogram also highlighted the potential for a delay in diagnosis or oversight of a healthcare-associated infection due to several factors: 1) cystograms may be ordered, performed/interpreted, and followed up by multiple different providers; and 2) such infections are not captured by traditional healthcare-associated infection surveillance strategies. CONCLUSIONS: The risk of ppUTI after a cystogram is very low. Only children with pre-existing urologic diagnoses developed ppUTI in this study. This study's findings suggest that children undergoing a cystogram should not be given peri-procedural antibiotic prophylaxis for the sole purpose of ppUTI prevention.
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Cistografía/efectos adversos , Infecciones Urinarias/epidemiología , Enfermedades Urológicas/diagnóstico por imagen , Adolescente , Niño , Preescolar , Femenino , Humanos , Incidencia , Lactante , Recién Nacido , Masculino , Estudios Retrospectivos , Factores de Riesgo , Infecciones Urinarias/diagnóstico por imagenRESUMEN
This video provides a case report of penis entrapment secondary to excessive skin removal during circumcision. It highlights the technical aspects of pediatric penile reconstruction using autologous split-thickness skin graft (STSG). Key points include: 1. Infection prevention is paramount and antibiotic prophylaxis is routine. 2. The usual harvest site for the STSG is the lateral thigh because of its source of glabrous skin and convenient proximity to the penis. The lateral thigh is also outside of the diapered area, which helps lessen postoperative pain and infectious risks. 3. A dermatome is used to harvest the STSG. Skin thickness for penis coverage at this age is usually 10-12/1000 of an inch. 4. Direct contact of the graft and wound bed is essential for graft uptake. Hemostasis of the wound bed is critical to prevent hematoma formation. Elimination of redundant tissue is also important to ensure maximal contact between the graft and underlying wound bed. 5. A pressure dressing or bolster is used to prevent shear, and provide contact between the graft and wound bed for at least the first 5 days. 6. A semi-occlusive dressing, Tegaderm, was used on the donor site and it is believed that it provides a moist environment conducive for epithelial and dermal healing. 7. Lymphedema can result if excess distal penile skin is not excised. It is prudent to limit the amount of mucosal collar or consider direct anastomosis to the glans.
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Pene/lesiones , Pene/cirugía , Trasplante de Piel , Preescolar , Humanos , Masculino , Procedimientos de Cirugía Plástica/métodos , Procedimientos Quirúrgicos Urológicos Masculinos/métodosRESUMEN
INTRODUCTION: Recent studies have suggested that a smaller glans penis size may be associated with a higher likelihood of complications after hypospadias repair. Accurate identification of risk factors other than the well-understood variable of meatal location would allow development of better prognostic models and individualized risk stratification. OBJECTIVE: To test the hypothesis that a smaller width of the glans penis predicts adverse outcomes after hypospadias surgery. METHODS: Prospectively recorded clinical data were reviewed from a single-institution registry of primary hypospadias repairs performed between 2011 and 2014. Follow-up records were examined for occurrence of complications. Urethroplasty complications were defined to include meatal stenosis, dehiscence, urethrocutaneous fistula, urethral stricture, and/or urethral diverticulum. The subset of meatal stenosis and dehiscence were regarded as glanular complications. Regression analyses were performed to determine association between glans width and occurrence of complications. Because pre-operative androgen stimulation is known to increase glans penis size, separate subgroup analyses were included of patients with and without pre-operative use of testosterone cream. RESULTS: A total of 159 patients met criteria for inclusion in the study cohort: 140 patients underwent a single-stage repair, while 19 patients had a two-stage repair. The median glans penis width was 15 mm (range 10-22). Eighty-four patients (53%) received testosterone cream pre-operatively and had a significantly wider glans penis than the 75 patients who did not (median 15.5 vs 14 mm; P < 0.001). Median clinical follow-up was 7 months (IQR 1-12), with a minimum time elapsed since surgery of 10 months at the time of chart review. Twenty-four patients (15%) had one or more urethroplasty complications, including 11 (7%) with glanular complications. Overall, there was no statistically significant association between glans width and urethroplasty complications (P = 0.26) or glanular complications (P = 0.90) (Summary Table). Subgroup analyses of patients with and without pre-operative testosterone also revealed no significant associations between glans width and complications. CONCLUSIONS: Glans penis width was not a risk factor for complications after hypospadias repair. This finding differs from the results of other recent studies and encourages further research into the value of measuring penile parameters in patients undergoing hypospadias repair.
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Hipospadias/cirugía , Pene/anatomía & histología , Complicaciones Posoperatorias/epidemiología , Humanos , Lactante , Masculino , Tamaño de los Órganos , Estudios Retrospectivos , Factores de RiesgoRESUMEN
INTRODUCTION: Sexual dysfunction and infertility are prevalent in the spina bifida (SB) population; however, the mechanism of how they affect a person with spina bifida is poorly understood. Additionally, the management of children with spina bifida becomes more difficult as they exit from pediatric institutes. OBJECTIVE: The present study sought to evaluate sexual health (using validated questionnaires) and fertility in adults with spina bifida and to correlate spinal cord level and ambulatory status with degree of sexual function. STUDY DESIGN: After institutional board review approval, 199 adult patients with SB, aged 18 and older and who were followed in one pediatric institution, were identified. Patients who were non-English speaking, cognitively and/or developmentally delayed, or unable to be contacted were excluded. Surveys regarding demographics, sexual health and infertility were mailed to the patients and administered in the clinic with the option to opt-out of the survey. Survey questions regarding sexual health were constructed using validated questionnaires: Female Sexual Function Index (FSFI) for females, and International Index of Erectile Function (IIEF) and Sexual Health Inventory for Men (SHIM) for males. Sexual dysfunction scores were correlated to the patients' spinal level and ambulatory status. RESULTS: Of the 121 eligible patients, 45 replied, with a response rate of 39%. For females, using a cut-off value of 26.5 for FSFI scoring, 25 out of 28 (89%) had sexual dysfunction. No association was seen between spinal level or ambulatory status and overall FSFI, satisfaction, or desire scores. For males, 10 out of 17 (59%) had severe erectile dysfunction (ED), and one out of 17 (6%) had no ED. No association was seen between ambulatory status and sexual function scores for the males. However, SHIM, satisfaction, and ED scores were higher in males with lower spinal lesions. People with spina bifida of both genders tended to have more severe dysfunction compared to those with sexual dysfunction of other etiologies, except with similar sexual desire scores. Regarding questions on fertility, no participant attempted to have children; thus, there was no infertility reported. DISCUSSION: Few studies have been conducted on sexual health and fertility in adults with SB. Three studies have utilized validated questionnaires and found varying degrees of sexual dysfunction in this subset of patients; however, only one study found sexual activity to be more likely in patients with more caudal levels of neurologic impairment. The present study also showed that SHIM, satisfaction, and ED scores were higher in males with lower spinal lesions. Limitations to this study primarily included the small sample size and low survey response rate. CONCLUSION: Limited information is known about adults with SB, and sexual function and fertility. While expressing sexual desire, adults with SB appear to experience high rates of sexual dysfunction. Fertility rates were inadequately assessed; this was possibly due to the high rate of sexual dysfunction. Sexual health in the SB population is an important component of the myriad of urologic care issues for these people. Due to the disparity in their care after reaching adulthood, it is prudent to follow these patients and understand their pathophysiology as they continue to mature through life.
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Conducta Sexual , Disfunciones Sexuales Fisiológicas/epidemiología , Disrafia Espinal/complicaciones , Disrafia Espinal/patología , Adolescente , Adulto , Estudios de Casos y Controles , Estudios de Cohortes , Femenino , Humanos , Infertilidad/epidemiología , Masculino , Factores Sexuales , Disrafia Espinal/psicología , Encuestas y Cuestionarios , Adulto JovenRESUMEN
Previous research suggests that language learners can detect and use the statistical properties of syllable sequences to discover words in continuous speech (e.g. Aslin, R.N., Saffran, J.R., Newport, E.L., 1998. Computation of conditional probability statistics by 8-month-old infants. Psychological Science 9, 321-324; Saffran, J.R., Aslin, R.N., Newport, E.L., 1996. Statistical learning by 8-month-old infants. Science 274, 1926-1928; Saffran, J., R., Newport, E.L., Aslin, R.N., (1996). Word segmentation: the role of distributional cues. Journal of Memory and Language 35, 606-621; Saffran, J.R., Newport, E.L., Aslin, R.N., Tunick, R.A., Barrueco, S., 1997. Incidental language learning: Listening (and learning) out of the corner of your ear. Psychological Science 8, 101-195). In the present research, we asked whether this statistical learning ability is uniquely tied to linguistic materials. Subjects were exposed to continuous non-linguistic auditory sequences whose elements were organized into 'tone words'. As in our previous studies, statistical information was the only word boundary cue available to learners. Both adults and 8-month-old infants succeeded at segmenting the tone stream, with performance indistinguishable from that obtained with syllable streams. These results suggest that a learning mechanism previously shown to be involved in word segmentation can also be used to segment sequences of non-linguistic stimuli.
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Aprendizaje , Adulto , Señales (Psicología) , Humanos , Lactante , Habla/fisiología , Estadística como AsuntoRESUMEN
A myotoxin was isolated from the venom of the broad-banded copperhead (Agkistrodon contortrix laticinctus) by HPLC using anion and cation exchange chromatography. The toxin has a mol. wt of approximately 14,000 and has a pI greater than 9. It does not have phospholipase A activity, but does induce myonecrosis of skeletal muscle cells characterized by a hypercontraction of myofilaments. Electron microscopic analysis showed that the myotoxin appears to disrupt the sarcolemma of skeletal muscle cells. ACL myotoxin is very similar in mol. wt, amino acid composition, and myotoxic activity to myotoxins isolated from the venoms of Bothrops asper and Bothrops nummifer from Central America, suggesting that homologs of this toxin may be found in other crotaline snake venoms.
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Venenos de Crotálidos/análisis , Enfermedades Musculares/inducido químicamente , Toxinas Biológicas/aislamiento & purificación , Aminoácidos/análisis , Animales , Cromatografía DEAE-Celulosa , Cromatografía Líquida de Alta Presión , Cromatografía por Intercambio Iónico , Electroforesis en Gel de Poliacrilamida , Femenino , Focalización Isoeléctrica , Ratones , Microscopía Electrónica , Peso Molecular , Músculos/patología , Enfermedades Musculares/patología , Fosfolipasas/metabolismo , Toxinas Biológicas/metabolismo , Toxinas Biológicas/toxicidadRESUMEN
Electrical shocks, even crudely delivered from 'stun guns' and gasoline engine spark plugs, have been reported to be effective in the treatment of snake bite. We thus applied similar electric shocks to mice artificially injected with reconstituted rattlesnake venom at various LD50 multiples. Those envenomated mice treated with electric shock survived no better than the controls. We thus found no evidence that electric shocks crudely administered had any life saving effect in mice.
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Electrochoque , Mordeduras de Serpientes/terapia , Animales , Masculino , RatonesRESUMEN
Biochemical differences in white and yellow venoms produced in the separate venom glands of an individual southern Pacific rattlesnake (Crotalus viridis helleri) were investigated. Compared to the yellow venom, the white venom contained fewer low molecular weight components and was considerably less toxic. Although the exact LD50 was not determined, the white venom did not produce toxic effects in mice when injected i.v. at concentrations up to 10 mg/kg. The i.v. LD50 of the yellow venom was approximately 1.6 mg/kg. Both white and yellow venoms had hemorrhagic activity, but the white venom caused less intradermal hemorrhage in mice. No L-amino acid oxidase activity was measured in the white venom and protease and phospholipase A2 activities of the white venom were much less than in the yellow venom. The white and yellow venoms both produced myonecrosis at 1, 3 and 24 hr after i.m. injection into mice, however, there were some qualitative differences in the myonecrosis produced. When the venom samples were reacted against Wyeth's polyvalent (Crotalidae) antivenom using immunodiffusion, three precipitin bands formed against the yellow venom, whereas only one formed against the white venom. When reacted against an antiserum to myotoxin alpha from C. viridis viridis venom, both the white and yellow venoms produced one precipitin band each.
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Venenos de Crotálidos/análisis , Aminoácido Oxidorreductasas/análisis , Animales , Venenos de Crotálidos/toxicidad , Electroforesis en Gel de Poliacrilamida , Glándulas Exocrinas/metabolismo , Hemorragia/inducido químicamente , Inmunodifusión , L-Aminoácido Oxidasa , Masculino , Ratones , Enfermedades Musculares/inducido químicamente , Enfermedades Musculares/patología , Péptido Hidrolasas/análisis , Fosfolipasas A/análisis , Fosfolipasas A2 , Dodecil Sulfato de SodioRESUMEN
Although the interview is widely used in the selection of applicants for admission to U.S. medical schools, little is known about current interview practices. The authors formulated a 46-item questionnaire concerning the interview process for medical school applicants, then in 1989 sent it to admission officials at all the 127 LCME-accredited schools in the United States. The questionnaire concerned the interview's status as a predictor; interviewers and interview structure; interviewer training; and the utility of interview data. Seventy-two percent of those sent the questionnaire completed and returned it. The responding admission officials indicated that the interview had two major purposes at their schools: as a means of assessing candidates' noncognitive skills and as a public relations tool. Most schools' interview processes were loosely to moderately structured, and interviewers received minimal training. It is concluded that the interview's role is primarily subjective and that it has a definite but imprecise influence on admission decisions.
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Educación de Pregrado en Medicina , Entrevistas como Asunto , Criterios de Admisión Escolar , Capacitación en Servicio , Entrevistas como Asunto/métodos , Reproducibilidad de los Resultados , Estados UnidosRESUMEN
Significant demographic, legal, and educational developments during the last ten years have led medical schools to review critically their selection procedures. A critical component of this review is the selection interview, since it is an integral part of most admission processes; however, some question its value. Interviews serve four purposes: information gathering, decision making, verification of application data, and recruitment. The first and last of these merit special attention. The interview enables an admission committee to gather information about a candidate that would be difficult or impossible to obtain by any other means yet is readily evaluated in an interview. Given the recent decline in numbers of applicants to and interest in medical school, many schools are paying closer attention to the interview as a powerful recruiting tool. Interviews can be unstructured, semistructured, or structured. Structuring involves analyzing what makes a medical student successful, standardizing the questions for all applicants, providing sample answers for evaluating responses, and using panel interviews (several interviewers simultaneously with one applicant). Reliability and validity of results increase with the degree of structuring. Studies of interviewers show that they are often biased in terms of the rating tendencies (for instance, leniency or severity) and in terms of an applicant's sex, race, appearance, similarity to the interviewer, and contrast to other applicants). Training interviewers may reduce such bias. Admission committees should weigh the purposes of interviewing differently for various types of candidates, develop structured or semistructured interviews focusing on nonacademic criteria, and train the interviewers.
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Evaluación Educacional , Entrevistas como Asunto/métodos , Criterios de Admisión Escolar , Facultades de Medicina/normas , Sesgo , Objetivos , InvestigaciónRESUMEN
Maitland's slump test is a widely used neural tissue tension test. During slump testing, terminal knee extension is assessed for signs of restricted range of motion (ROM), which may indicate impaired neural tissue mobility. A number of refinements that modify hip and ankle position has been added to the basic slump test procedure, but no research to date has measured the effects of ankle and hip position on knee extension ROM during testing. The purpose of this study was to examine the effect of neural tension-producing movements of the cervical spine and lower extremity on knee extension ROM during the slump test. Thirty-four males with no significant history of low back pain were tested in the slump position with the cervical spine flexed and extended in each of three lower extremity test positions: neutral hip rotation with the ankle in a position of subject comfort (neutral), neutral hip rotation with ankle dorsiflexion (ankle dorsiflexion), and medial hip rotation with ankle dorsiflexion. Results showed significant decreases in active knee extension ROM (F1,198 = 29.53, p < 0.0001) in the cervical flexion compared with the cervical extension conditions. Subjects also exhibited significant decreases in active knee extension ROM (F2,198 = 56.76, p < 0.0001) as they were progressed from neutral to the ankle dorsiflexion to the medial hip rotation with ankle dorsiflexion positions of the lower extremity. The results of our study indicate that limitations in terminal knee extension ROM may be considered a normal response to the inclusion of cervical flexion, ankle dorsiflexion, or medial hip rotation in the slump test in young, healthy, adult males. In addition, the presence of a cumulative effect on knee extension ROM with the simultaneous application of these motions is noted. These findings may assist clinicians when assessing knee extension ROM during slump testing.
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Vértebras Cervicales/anatomía & histología , Cabeza/anatomía & histología , Articulación de la Rodilla/fisiología , Pierna/anatomía & histología , Postura/fisiología , Rango del Movimiento Articular/fisiología , Adulto , Análisis de Varianza , Articulación del Tobillo/anatomía & histología , Articulación del Tobillo/fisiología , Articulación de la Cadera/anatomía & histología , Articulación de la Cadera/fisiología , Humanos , Masculino , Persona de Mediana Edad , Contracción Muscular/fisiología , Músculos del Cuello/fisiología , Nervios Periféricos/fisiología , Rotación , Método Simple Ciego , Estrés Mecánico , Posición SupinaRESUMEN
This study (n = 18 men and women) sought to determine whether (a) the Eliminating Self-Defeating Behaviors Workshop would help smokers significantly decrease their smoking behavior, (b) this decrease would be maintained for four weeks, and (c) the Rotter I-E Scale could predict which smokers would show the most significant decrease and maintain this reduction. The results indicated that members of the experimental group made significant decreases in their smoking rates (p less than .001) and maintained this reduction for four weeks. The experimental group also made significant changes toward more internal locus of control at the conclusion of the workshop (p less than .10) but did not maintain this change at the four-week follow-up. The Rotter I-E Scale was unable to predict which individuals would show the most significant decrease in smoking rate and maintain this reduction.