EFFECT OF SOME IMMUNOMODULATORY DRUGS ON EMBRYONIC DEVELOPMENT OF DANIO RERIO FISH

At the current stage of healthcare development, the inclusion of immunomodulators in the complex pharmacotherapy of various immunoinflammatory and viral diseases is widely discussed, but due to the lack of sufficient research and a broad evidence base, not all drugs with similar properties are used in medicine. According to the information obtained from the instructions for the use of immunomodulators, it was obtained that the main contraindications to their use include the prescription of children, pregnant women, and women during breastfeeding. In this study, we evaluated the effects of immunomodulatory drugs: aminodihydrophthalazindione sodium and meglumine acridonacetate, on the early developmental stages of Danio rerio (Zebrafish) embryos.

Ultrasonic measurement of temperature distributions in extreme environments: Electrical power plants testing in utility-scale steam generators

Thermal heterogeneities within energy conversion and storage, material processing, nuclear processes, aerospace, and military applications are often inaccessible to characterization by insertion sensors. When sensor deployment is possible, conventional pointwise temperature probes quickly degrade when inserted into harsh environments typical of such processes. We developed spatially-resolved ultrasonic thermometry to noninvasively measure the spatial distributions of thermal properties in such applications, even when sizable thermal gradients are present. Our method divides the path of ultrasonic propagation into segments bound by echogenic features, which create echoes in pulse-echo mode, encoding the information about interior temperature distributions. We use the acquired ultrasonic responses to estimate the internal temperature distributions by solving an inverse problem or concatenating segmental estimates. This work describes the implementation and industrial testing of the developed method at a coal-fired electrical power generation plant. We inserted an echogenically segmented Inconel 625 waveguide into the combustion zone of the utility-scale boiler and continuously acquired ultrasonic data while keeping sensitive components away from the damaging combustion environment. The accuracy of the time-dependent temperature distributions reconstructed from the ultrasonic measurements was comparable to that of thermocouples. The resiliency of ultrasonic thermometry to harsh combustion conditions was far superior to conventional insertion sensors. The measurements obtained during plant operation captured daily steam generation cycles in response to changing customer demand and intermittent contributions of renewable power sources to the power grid. These measurements have revealed new insights into the relationship between the dynamic power generation load and the conditions inside the steam generator. The successful industrial testing of spatially-resolved ultrasonic thermometry in solids indicates that the developed technology has matured to become an attractive alternative to conventional sensing in solving challenging problems of long-term thermal characterizations in extreme environments.

Psychometric Evaluation of the Veterans Affairs Bereaved Family Survey in Community Nursing Homes

CONTEXT

For over a decade, the Department of Veterans Affairs (VA) has used the Bereaved Family Survey (BFS) to measure the quality of end-of-life (EOL) care in VA inpatient settings. In 2019, VA developed a revised version of the BFS to evaluate the quality of EOL care for Veterans who received hospice services in VA-contracted community nursing homes (CNHs).

OBJECTIVES

The purpose of this analysis was to evaluate the psychometric properties and factor structure of the BFS-CNH.

METHODS

The BFS-CNH was administered to the next-of-kin of Veterans who died in a VA-contracted CNH with hospice care between October 2019 and April 2020. Exploratory factor analysis (EFA) was used with the 10 core items of the BFS-CNH that were derived from the inpatient BFS to evaluate whether the BFS-CNH exhibited a similar factor structure to the inpatient version. Cronbach's alpha was used to assess internal consistency/reliability of the identified factors and linear regression models were used to evaluate construct validity of the identified BFS-CNH factor scores and individual items.

RESULTS

The EFA revealed a three-dimension solution that corresponded to factors on the inpatient BFS, including Care and Communication, Emotional and Spiritual Support and Death Benefits. Cronbach's alpha coefficients for all three factors indicated acceptable internal consistency.

CONCLUSION

Our findings provide support for use of the BFS-CNH to evaluate the quality of EOL care provided to Veterans in CNHs and lay the foundation for future comparisons of BFS ratings between VA inpatient and CNH settings.

Palliative Care and Documented Suicide: Association Among Veterans With High Mortality Risk

CONTEXT

Palliative care consultations (PCCs) are associated with reduced physical and psychological symptoms that are related to suicide risk. Little is known, however, about the association between PCCs and death from suicide among patients at high risk of short-term mortality.

OBJECTIVE

To examine the association between the number of PCCs and documentation of suicide in a cohort of Veterans at high risk of short-term mortality, before and after accounting for Veterans' sociodemographic characteristics and clinical conditions.

METHODS

An observational cohort study was conducted using linked Veterans Affairs clinical and administrative databases for 580,620 decedents with high risk of one-year mortality. Logistic regression models were used to examine the association between number of PCCs and documentation of suicide.

RESULTS

Higher percentages of Veterans who died by suicide were diagnosed with chronic pulmonary disease as well as mental health/substance use conditions compared with Veterans who died from other causes. In adjusted models, one PCC in the 90 days prior to death was significantly associated with a 71% decrease in the odds of suicide (OR = 0.29, 95% CI = 0.23-0.37, P < 0.001) and two or more PCCs were associated with a 78% decrease (OR = 0.22, 95% CI = 0.15-0.33, P < 0.001). Associated "number needed to be exposed" estimates suggest that 421 Veterans in this population would need to receive at least one PCC to prevent one suicide.

CONCLUSION

While acknowledging the importance of specialized mental health care in reducing suicide among high-risk patients, interventions delivered in the context of PCCs may also play a role.

Family reports of end-of-life care among veterans in home-based primary care: The role of hospice

BACKGROUND

The Department of Veterans Affairs (VA)'s home-based primary care (HBPC) program provides coordinated, interdisciplinary care to seriously ill and disabled veterans, but few evaluations have considered end-of-life (EOL) care in this population. The aim of this study was to describe veterans' use of community-based hospice services while enrolled in HBPC and their associations with bereaved families' perceptions of care.

METHODS

This study was a retrospective analysis of electronic medical record and bereaved family survey (BFS) data for veterans who died while enrolled in VA's HBPC program between October 2013 and September 2019. Seven regional VA networks called Veteran Integrated Service Networks participated in BFS data collection. The final sample included 3967 veterans who were receiving HBPC services at the time of death and whose next-of-kin completed a BFS. The primary outcome was the BFS global rating of care received in the last 30 days of life. Adjusted proportions for all BFS outcomes were examined and compared between those who received community-based hospice services and those who did not.

RESULTS

Overall, 52.6% of BFS respondents reported that the care received by HBPC-enrolled veterans in the last 30 days of life was excellent using the BFS global rating. Among families of HBPC-enrolled veterans who received community-based hospice services, the BFS global rating was roughly eight percentage points higher than those who did not (55.7 vs. 47.0%, p < 0.001). On 12 of the 14 secondary BFS outcomes, veterans who received hospice scored higher than those who did not.

CONCLUSIONS

Receipt of hospice services while enrolled in HBPC was associated with higher ratings of EOL care by bereaved family members. Integration of community hospice partners for qualifying veterans who are enrolled in the HBPC program represents a potential opportunity to improve the overall experience of EOL care for veterans and their families.

End-Of-Life Care in the Time of COVID-19: Communication Matters More Than Ever

CONTEXT

The COVID-19 pandemic resulted in visitation restrictions across most health care settings, necessitating the use of remote communication to facilitate communication among families, patients and health care teams.

OBJECTIVE

To examine the impact of remote communication on families' evaluation of end-of-life care during the COVID-19 pandemic.

METHODS

Retrospective, cross-sectional, mixed methods study using data from an after-death survey administered from March 17-June 30, 2020. The primary outcome was the next of kin's global assessment of care during the Veteran's last month of life.

RESULTS

Data were obtained from the next-of-kin of 328 Veterans who died in an inpatient unit (i.e., acute care, intensive care, nursing home, hospice units) in one of 37 VA medical centers with the highest numbers of COVID-19 cases. The adjusted percentage of bereaved families reporting excellent overall end-of-life care was statistically significantly higher among those reporting Very Effective remote communication compared to those reporting that remote communication was Mostly, Somewhat, or Not at All Effective (69.5% vs. 35.7%). Similar differences were observed in evaluations of remote communication effectiveness with the health care team. Overall, 81.3% of family members who offered positive comments about communication with either the Veteran or the health care team reported excellent overall end-of-life care vs. 28.4% who made negative comments.

CONCLUSIONS

Effective remote communication with the patient and the health care team was associated with significantly better ratings of the overall experience of end-of-life care by bereaved family members. Our findings offer timely insights into the importance of remote communication strategies.

Quality of end-of-life care for Vietnam-era Veterans: Implications for practice and policy

BACKGROUND

In federal response to the aging population of Vietnam-era Veterans, Congress directed the Department of Veterans Affairs (VA) to create a pilot program to identify and develop best practices for improving hospice care for this population. A first step in VA's response was to identify whether the end-of-life (EOL) care needs and outcomes of Vietnam-era Veterans differed from previous generations.

METHODS

Using medical records and bereaved family surveys, we examined clinical characteristics, healthcare utilization, and EOL quality indicators for Vietnam-era Veterans who died in VA inpatient settings between fiscal year 2013-2017. Contemporaneous comparisons were made with World War II/Korean War-era Veterans.

RESULTS

Compared to prior generations, higher percentages of Vietnam-era Veterans had mental health/substance use diagnoses and disability. Similar percentages of family members in both groups reported that overall EOL care was excellent; however, post-traumatic stress disorder management ratings by families of Vietnam-era Veterans were significantly lower.

CONCLUSIONS

Although current VA EOL practices are largely meeting the needs of Vietnam-era Veterans, greater focus on mental health comorbidity, including post-traumatic stress disorder, Agent Orange-related conditions, and ensuring access to quality EOL care in the community is warranted.

IMPLICATIONS

Policymakers and healthcare professionals should anticipate more physical and mental health comorbidities among Veterans at EOL as Vietnam-era Veterans continue to age. Findings are being used to inform the development of standardized EOL care protocols and training programs for non-VA healthcare providers that are tailored to the needs of this population.

"That is Care That you Just can't fake!": Identifying Best Practices for the Care of Vietnam Veterans at End of Life

CONTEXT

We reviewed the Veterans Health Administration Bereaved Family Survey's open-ended responses to understand end-of-life (EOL) care best practices for Vietnam and pre-Vietnam Veterans.

OBJECTIVES

To identify 1) recommendations for improved EOL care enhancements for older Veterans, 2) a model of best practices in EOL care for Veterans, and 3) any relevant differences in best practices between Vietnam and prior war eras.

METHODS

We examined five years of Bereaved Family Survey data (n = 2784), collected between 2013 and 2017, from bereaved family members of Veterans focusing on 2 open-ended questions: 1) Is there anything else you would like to share about the Veteran's care during his last month of life? 2) Is there anything else you would like to share about how the care could have been improved for the Veteran? Applied thematic analysis identified successes and challenges in the experience of the bereaved of Vietnam and pre-Vietnam era Veterans.

RESULTS

Regardless of war era and death venue, a patient-centered approach to EOL care with readily available staff who could 1) provide ongoing support, comfort, honor, and validation; 2) routinely adjust to the patient's changing needs; 3) and provide clear, honest, timely, compassionate communication was important to the bereaved. Consideration of the uniqueness of Vietnam Veterans is beneficial.

CONCLUSIONS

Patient-centered EOL care should include assigning a point of contact that follows the patient, educates the family on expectations, ensures the patient's changing needs are met, ensures the family has appropriate support, and communicates updates to the family throughout the patient's care continuum.

"Why Couldn't I Go in To See Him?" Bereaved Families' Perceptions of End-of-Life Communication During COVID-19

BACKGROUND/OBJECTIVE

The COVID-19 pandemic has resulted in rapid changes to end-of-life care for hospitalized older adults and their families, including visitation restrictions. We examined bereaved families' perceptions of the quality of end-of-life communication among Veterans, families and staff in Veterans Affairs (VA) medical centers during the COVID-19 pandemic.

DESIGN

Qualitative descriptive study using data from a survey of bereaved family members of Veterans administered from March-June 2020. Data were analyzed using qualitative content analysis.

SETTING

VA medical centers with the highest numbers of COVID-19 cases during the study period.

PARTICIPANTS

Next-of-kin of 328 Veterans who died in one of 37 VA medical centers' acute care, intensive care, nursing home, or hospice units.

MEASUREMENTS

Open-ended survey questions (response rate = 37%) about family member's perceptions of: (1) communication with the healthcare team about the patient, (2) communication with the patient, and (3) use of remote communication technologies.

RESULTS

Bereaved family members identified contextual factors perceived to impact communication quality including: allowing family at the bedside when death is imminent, fears that the patient died alone, and overall perceptions of VA care. Characteristics of perceived high-quality communication included staff availability for remote communication and being kept informed of the patient's condition and plan of care. Low-quality communication with staff was perceived to result from limited access to staff, insufficient updates regarding the patient's condition, and when the family member was not consulted about care decision-making. Communication quality with the patient was facilitated or impeded by the availability and use of video-enabled remote technologies.

CONCLUSION

Communication between patients, families, and healthcare teams at the end of life remains critically important during times of limited in-person visitation. Families report that low-quality communication causes profound distress that can affect the quality of dying and bereavement. Innovative strategies are needed to ensure that high-quality communication occurs despite pandemic-related visitation restrictions.

Quality of End-of-Life Care for Vietnam Veterans: Implications for Practice and Policy

In federal response to the aging population of Vietnam-era Veterans, Congress directed the Department of Veterans Affairs (VA) to create a pilot program to identify and develop best practices for improving hospice care for this population. A first step in VA’s response was to identify whether the end-of-life (EOL) care needs and outcomes of Vietnam-era Veterans differed from previous generations. Using medical records and bereaved family surveys, we examined clinical characteristics, healthcare utilization, and EOL quality indicators for Vietnam-era Veterans who died in VA inpatient settings between 2013-17. Contemporaneous comparisons were made with World War II/Korean War-era Veterans. Compared to prior generations, higher percentages of Vietnam-era Veterans had mental health/substance use diagnoses and disability. Similar percentages of family members in both groups reported that overall EOL care was excellent; however, post-traumatic stress disorder management ratings by families of Vietnam-era Veterans were significantly lower. Although current VA EOL practices are largely meeting the needs of Vietnam-era Veterans, greater focus on mental health comorbidity, including post-traumatic stress disorder, Agent Orange-related conditions, and ensuring access to quality EOL care in the community is warranted. Policymakers and healthcare professionals should anticipate more physical and mental health comorbidities among Veterans at EOL as Vietnam-era Veterans continue to age. Findings are being used to inform the development of standardized EOL care protocols and training programs for non-VA healthcare providers that are tailored to the needs of this population.

A National Study of End-of-Life Care among Older Veterans with Hearing and Vision Loss

OBJECTIVES

Hearing and visual sensory loss is prevalent among older adults and may impact the quality of healthcare they receive. Few studies have examined sensory loss and end-of-life (EOL) care quality. Our aim was to describe hearing and vision loss and their associations with the quality of EOL care and family perception of care in the last 30 days of life among a national sample of veteran decedents.

DESIGN

Retrospective medical record review and Bereaved Family Survey (BFS).

SETTING

Veterans Affairs (VA) Medical Centers (N = 145).

PARTICIPANTS

Medical record review of all veterans who died in an inpatient VA Medical Center between October 2012 and September 2017 (N = 96 424). Survey results included 42 428 individuals.

MEASUREMENTS

Three indicators of high-quality EOL care were measured: palliative consultation in the last 90 days of life, death in a non-acute setting, and contact with a chaplain. The BFS reflects a global evaluation of quality of EOL care; pain and posttraumatic stress disorder management; and three subscales characterizing perceptions regarding communication, emotional and spiritual support, and information about death benefits in the last month of life.

RESULTS

In adjusted models, EOL care quality indicators and BFS outcomes for veterans with hearing loss were similar to those for veterans without hearing loss; however, we noted slightly lower scores for pain management and less satisfaction with communication. Veterans with vision loss were less likely to have received a palliative care consult or contact with a chaplain than those without vision loss. Although BFS respondents for veterans with vision loss were less likely than respondents for veterans without vision loss to report excellent overall care and satisfaction with emotional support, other outcomes did not differ.

CONCLUSION

In general, the VA is meeting the EOL care needs of veterans with hearing and vision loss through palliative care practices. J Am Geriatr Soc 68:817-825, 2020.

Phospholipase A2 activity is associated with structural brain changes in schizophrenia

Regional structural brain changes are among the most robust biological findings in schizophrenia, yet the underlying pathophysiological changes remain poorly understood. Recent evidence suggests that abnormal neuronal/dendritic plasticity is related to alterations in membrane lipids. We examined whether serum activity of membrane lipid remodelling/repairing cytosolic phospholipase A(2) (PLA(2)) were related to regional brain structure in magnetic resonance images (MRI). The study involved 24 schizophrenia patients, who were either drug-naïve or off antipsychotic medication, and 25 healthy controls. Using voxel-based morphometry (VBM) analysis of T1-high-resolution MRI-images, we correlated both gray matter and white matter changes with serum PLA(2)-activity. PLA(2) activity was increased in patients, consistent with previous findings. VBM group comparison of patients vs. controls showed abnormalities of frontal and medial temporal cortices/hippocampus, and left middle/superior temporal gyrus in first-episode patients. Group comparison of VBM/PLA(2)-correlations revealed a distinct pattern of disease-related interactions between gray/white matter changes in patients and PLA(2)-activity: in first-episode patients (n=13), PLA(2)-activity was associated with structural alterations in the left prefrontal cortex and the bilateral thalamus. Recurrent-episode patients (n=11) showed a wide-spread pattern of associations between PLA(2)-activity and structural changes in the left (less right) prefrontal and inferior parietal cortex, the left (less right) thalamus and caudate nucleus, the left medial temporal and orbitofrontal cortex and anterior cingulum, and the cerebellum. Our findings demonstrate a potential association between membrane lipid biochemistry and focal brain structural abnormalities in schizophrenia. Differential patterns in first-episode vs. chronic patients might be related to PLA(2)-increase at disease-onset reflecting localized regenerative activity, whereas correlations in recurrent-episode patients might point to less specific neurodegenerative aspects of disease progression.

Heart transplantation in the United States, 1999-2008

This article features 1999-2008 trends in heart transplantation, as seen in data from the Organ Procurement and Transplantation Network (OPTN) and the Scientific Registry of Transplant Recipients (SRTR). Despite a 32% decline in actively listed candidates over the decade, there was a 20% increase from 2007 to 2008. There continues to be an increase in listed candidates diagnosed with congenital heart disease or retransplantation. The proportion of patients listed as Status 1A and 1B continues to increase, with a decrease in Status 2 listings. Waiting list mortality decreased from 2000 through 2007, but increased 18% from 2007 to 2008; despite the increase in waiting list death rates in 2008, waiting list mortality for Status 1A and Status 1B continues to decrease. Recipient numbers have varied by 10% over the past decade, with an increased proportion of transplants performed in infants and patients above 65 years of age. Despite the increase in Status 1A and Status 1B recipients at transplant, posttransplant survival has continued to improve. With the rise in infant candidates for transplantation and their high waiting list mortality, better means of supporting infants in need of transplant and allocation of organs to infant candidates is clearly needed.

Increased calcium-independent phospholipase A2 activity in first but not in multiepisode chronic schizophrenia

BACKGROUND

Increased activity of calcium independent phospholipase A2 (iPLA2) has repeatedly been found in the serum of unmedicated first-episode schizophrenia patients and assumed to reflect a pertubation of phospholipid metabolism. Previous studies in chronic schizophrenia were less conclusive. To explore whether iPLA2 changes are stage dependent, we investigated serum iPLA2 activity in various stages of schizophrenia.

METHODS

iPLA2 activity was assessed in the serum of 30 first-episode and 23 multiepisode schizophrenia patients and 53 healthy control subjects matched for age and gender. A fluorimetric assay was applied using the PLA2 specific substrate NBDC6-HPC, thin-layer chromatography of reaction products, and digital image scanning for signal detection.

RESULTS

Group comparison between first-episode and multiepisode patients and corresponding control groups revealed significantly increased iPLA2 activity only in first-episode patients. Enzyme activity in first-episode patients was also markedly increased, compared with chronic patients. iPLA2 changes observed were irrespective of neuroleptic medication, age, or gender.

CONCLUSIONS

Our results suggest increased lipid turnover in the acute early phase of schizophrenia that is less obvious in chronic stages. Future longitudinal studies involving iPLA2 activity and phosphorous magnetic resonance spectroscopy need to address the relation between perturbed brain lipid metabolism and iPLA2 increment in the course of schizophrenia.

Fluorometric assays of phospholipase A2 activity with three different substrates in biological samples of patients with schizophrenia

The rationale of this study was to understand the complexity of kinetics of fluorogenic phospholipid substrates as well as contradictory findings of clinical papers measuring phospholipase A2 (PLA2) activity using different methodologies. The aim was to recommend to clinicians and researchers what substrate in conjunction with what assay should be used. Two methods, (i) continuous fluorometric assay and (ii) high performance thin layer chromatography (HPTLC) on microplates combined with quantitative image scanning, were studied with three different substrates (bis-BODIPY FL C11-PC, NBDC6-HPC, PED6). The study demonstrates that NBD-PC is not a suitable substrate to measure PLA2 activity using a spectrofluorometer. On the other hand, NBD-PC gives the highest and most reproducible integrated light intensities (ILls) in HPTLC studies. Slow time-dependent increases in fluorescence intensities recorded with biological samples in fluorometers, but not caused by substrate splitting, had to be classified as "perturbation kinetics". PLA2 activities in blood samples of 26 unmedicated schizophrenia patients and 26 age-matched healthy controls were measured by the spectrofluorometric method and then compared with the activity data obtained with the HPTLC method. A significant group difference was found only with the HPTLC. In order to get more reliable results, we recommend that clinicians and researchers use NBD-phosphatidylcholines as PLA2 substrates in biological samples and start with an analytical separation of reaction products followed by image analysis of the fluorescent spots.

Use of power Doppler in pediatric neurosonography: a pictorial essay

In pediatric neurosonography, conventional color Doppler imaging has been the primary adjunct to routine gray-scale imaging. Power Doppler sonography is a relatively recent development that does not have the limitations of conventional color Doppler ultrasound. The power Doppler technique measures the energy of moving red blood cells instead of the velocity and direction of flow. Advantages of this technique include increased sensitivity for identifying flow in slow-flow states, more complete evaluation of a vessel, and more accurate evaluation of the course of the vessel. Power Doppler sonography is helpful in evaluation of the neonatal brain in a variety of clinical situations: identifying the exact locations of extraaxial fluid collections, differentiating intraventricular clot from normal choroid plexus, detecting intraventricular hemorrhage, and demonstrating asymmetries in cerebral perfusion. However, in certain difficult cases, use of both conventional color Doppler sonography and power Doppler sonography produces increased diagnostic accuracy because these techniques furnish complementary information.

Peptide inhibitors of src SH3-SH2-phosphoprotein interactions

Activated pp60c-src has been implicated in a number of human malignancies including colon carcinoma and breast adenocarcinoma. Association of the src SH2 domain with tyrosine-phosphorylated proteins plays a role in src-mediated signal transduction. Inhibitors of src SH2 domain-phosphoprotein interactions are, thus, of great interest in defining the role(s) of src in signal transduction pathways. To facilitate such studies, an enzyme-linked immunosorbent assay (ELISA) was developed to detect inhibitors of src SH2-phosphoprotein interactions. This assay measures inhibition of binding of a fusion construct (glutathione S-transferase src SH3-SH2) with autophosphorylated epidermal growth factor receptor tyrosine kinase domain. Activities of phosphopeptide segments derived from potential src SH2 cognate phosphoprotein partners were determined, with the focal adhesion kinase-derived segment VSETDDY*AEIIDE yielding the highest inhibitory activity. Structure activity studies starting from acetyl (Ac)-Y*EEIE have identified Ac-Y*Y*Y*IE as the most active compound screened in the ELISA. This compound is at least 20-fold more active than the parent peptide Ac-Y*EEIE. A high resolution (2 A) crystal structure of human src SH2 complexed with Ac-Y*EEIE was obtained and provided a useful framework for understanding the structure-activity relationships. Additionally, Ac-Y*EEIE was able to block interactions between src and its cellular phosphoprotein partners in vanadate-treated cell lysates from MDA-MB-468 breast carcinoma cells. However, it is unable to abrogate proliferation of MDA-MB-468 cells in culture, presumably because of poor cell penetration and/or lability of the phosphate group on tyrosine.

History strategy instruction: problem-solution-effect analysis, timeline, and vocabulary instruction

This multiple baseline study investigated the effectiveness of history strategy instruction emphasizing the linkage of knowledge in teaching junior high students with behavior disorders. The intervention included 24 students and 3 teachers across three classes for 3-6 weeks. The strategy included a scripted curriculum involving brisk student-teacher interchanges; student note taking and constructing of timelines and vocabulary definitions; and reciprocal questioning, using a carefully selected history textbook. Results indicate that the history strategy was effective; students in each class showed immediate and educationally significant improvement compared with baseline instruction that employed traditional history instruction.

Pediatric submersions: prehospital predictors of outcome

This retrospective cohort study was conducted to test prehospital prognostic indicators in pediatric submersion victims. The authors studied all less than 20 years old victims submerged in the non-icy waters of King County, WA who were treated by Seattle or King County Emergency Medical Services between 1985 and 1989 and were hospitalized or died. Seventy-seven victims were identified from emergency medical services incident logs, hospital discharge records, and medical examiner's registries. Outcome predictors were correlated with the victim's condition at hospital discharge. Of 29 victims in cardiac arrest, 13 had return of spontaneous circulation following field resuscitation. Of these, 6 (21%) survived, with mild (n = 2) and severe (n = 4) neurologic impairment at hospital discharge. The best outcome predictors were obtained in the field. These were, for death or severe neurologic impairment, submersion durations > 10 minutes (6/6) and resuscitation durations > 25 minutes (17/17), and for good outcome, sinus rhythm (37/37), reactive pupils (43/43), and neurologic responsiveness (40/40) at the scene. Field-determined factors were reproducibly good outcome predictors. Aggressive emergency medical services may save the lives of pediatric victims in cardiac arrest following short submersion durations. The data support pronouncing dead in the field those pediatric victims of non-icy submersions who do not respond to advanced life support within 25 minutes.

Pathological changes in peripheral nerves in experimental fetal alcohol syndrome

The peripheral nerve pathology is described in experimental fetal alcohol syndrome. The marked retraction and shrinkage of axons with vacuolar spaces in the periaxonal area are the striking features. The direct toxicity of ethanol or its metabolites on the nerve fibers is considered to be the cause for pathological changes. Additional biochemical factors, pyridoxal phosphate dependent enzyme-depletion in the genesis of nerve damage, is proposed.

Ethanol induced cardiomyopathy--role of periodic fasting

The periodic fasting in presence of continuous ethanol feeding produces pronounced morphological changes in the myocardium and its organelles of the rats. This effect of ethanol could be directly related to the sensitive state of myocardium to the former, specially when ethanol becomes an important source of energy. This is proved further by intraperitoneal injection of 40% ethanol, when profound mitochondrial morphological changes, even leading to formation of lysosome like structures, are evident in the myocardium. The study has stressed the pronounced direct effect of ethanol and its metabolites in the development of morphological changes of the myocardium.

Absence of myophosphorylase in ethanol induced cardiomyopathy

The enzyme myophosphorylase is found to be decreased progressively on the basis of histochemical stain in the myocardium of chronically ethanol intoxicated rats. The enzyme completely disappears by the 12th week of ethanol intoxication. The possibility of deficient myophosphorylase playing one of the important roles in the pathogenesis of cardiomyopathy is stressed.