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Safety and efficacy of digital rectal examination in patients with acute myocardial infarction.

OBJECTIVE: Digital rectal examination (DRE) is often ignored or deferred in acute myocardial infarction (AMI). The aim of this study was to determine the safety and efficacy of DRE in patients with AMI. METHODS: This was a prospective, comparative, stratified study in an inner-city teaching hospital. A total of 480 patients from intensive care and telemetry units were stratified into three groups. Group I included 160 patients with AMI in whom a DRE was performed and electrocardiographic (EKG) recordings were obtained. Group II included 155 patients with AMI in whom DRE was not done, but EKG recordings were made. Group III consisted of 165 patients without AMI in whom DRE was performed and EKG recordings were obtained. Sustained arrhythmias and vital signs were measured. RESULTS: None of the patients developed sustained arrhythmias and there was no change in vital signs. DRE resulted in the detection of several clinically significant findings. CONCLUSION: DRE was found to be safe in our stable patients with AMI.

Adult↗

Guidelines for the evaluation and assessment of the sustainable use of resources and of wastes management at healthcare facilities.

This paper presents guidelines that can be used by managers of healthcare facilities to evaluate and assess the quality of resources and waste management at their facilities and enabling the principles of sustainable development to be addressed. The guidelines include the following key aspects which need to be considered when completing an assessment. They are: (a) general management; (b) social issues; (c) health and safety; (d) energy and water use; (e) purchasing and supply; (f) waste management (responsibility, segregation, storage and packaging); (g) waste transport; (h) recycling and re-use; (i) waste treatment; and (j) final disposal. They identify actions required to achieve a higher level of performance which can readily be applied to any healthcare facility, irrespective of the local level of social, economic and environmental development. The guidelines are presented, and the characteristics of facilities associated with sustainable (level 4) and unsustainable (level 0) healthcare resource and wastes management are outlined. They have been used to assess a major London hospital, and this highlighted a number of deficiencies in current practice, including a lack of control over purchasing and supply, and very low rates of segregation of municipal solid waste from hazardous healthcare waste.

Conservation of Natural Resources↗

Low risk for hepatitis C in hemophiliacs given a high-purity, pasteurized factor VIII concentrate. International Study Group.

STUDY OBJECTIVE: To assess whether the hepatitis B virus (HBV), the hepatitis C virus (HCV), and the human immunodeficiency virus (HIV) are transmitted to hemophiliacs by a high-purity factor VIII concentrate in which the method of virus inactivation is pasteurization. DESIGN: Hepatitis B virus markers, the antibody to HCV (anti-HCV), the antibody to HIV (anti-HIV), and aminotransferases were measured on serum samples collected before the first concentrate infusion and at regular time intervals thereafter. SETTING: Seventeen hemophilia centers in Italy, the Federal Republic of Germany, Belgium, Austria, and the Democratic Republic of Germany. PATIENTS: Twenty-nine patients with hemophilia A who had not received a previous transfusion with blood products and who had normal alanine and aspartate aminotransferases (ALT and AST) were included in the final analysis. MEASUREMENTS AND MAIN RESULTS: No patient became positive for anti-HCV or anti-HIV or developed sustained increases in aminotransferase levels. Similarly, none of the 15 unvaccinated patients developed markers of HBV infection. CONCLUSION: This prospective study conducted in previously untransfused hemophiliacs highly susceptible to developing post-transfusion hepatitis shows that a large-pool clotting factor concentrate treated with pasteurization carries a low risk for transmitting HCV, the major causative agent of post-transfusion hepatitis.

Adolescent↗

Early childhood development in deprived urban settlements.

Poverty, the root cause of the existence of slums or settlement colonies in urban areas has a great impact on almost all aspects of life of the urban poor, especially the all-round development of children. Examples from countries, across the globe provide evidence of improved early child development, made possible through integrated slum improvement programs, are few in numbers. The observed 2.5% prevalence of developmental delay in the less than 2 year olds of deprived urban settlements, the presence of risk factors for developmental delay like low birth weight, birth asphyxia, coupled with poor environment of home and alternate child care services, highlights the need for simple cost effective community model for promoting early child development. This review on early child development focuses on the developmental status of children in the deprived urban settlements, who are yet to be on the priority list of Governments and international agencies working for the welfare of children, the contributory nature-nurture factors and replicable working models like infant stimulation, early detection of developmental delay in infancy itself, developmental screening of toddlers, skill assessment for preschool children, school readiness programs, identification of mental sub-normality and primary education enhancement program for primary school children. Further, the review probes feasible intervention strategies through community owned early child care and development facilities, utilizing existing programs like ICDS, Urban Basic Services and by initiating services like Development Friendly Well Baby Clinics, Community Extension services, Child Development Referral Units at district hospitals and involving trained manpower like anganwadi/creche workers, public health nurses and developmental therapists. With the decentralization process the local self-government at municipalities and city corporations are financially equipped to be the prime movers to initiate, monitor and promote early child development programs, to emerge as a part and parcel of community owned sustainable development process.

Child↗

Sustained monomorphic ventricular tachycardia in a patient with Brugada syndrome.

We report a patient with Brugada syndrome who developed sustained monomorphic ventricular tachycardia (SMVT). The patient was a 29-year-old man who experienced recurrent episodes of palpitation and syncope after drinking alcohol. Electrocardiogram showed right bundle branch block and ST-segment elevation in precordial leads V1-3 without Q-Tc prolongation. Organic heart disease and coronary artery disease were excluded by noninvasive and invasive tests. Ventricular fibrillation was induced by the application of a single extra-stimulus to the right ventricular outflow tract. During isoproterenol infusion, SMVT of left bundle branch block morphology (240/min) was induced by the application of a single extrastimulus to the right ventricular apex. SMVT also developed spontaneously. Pace mapping disclosed that SMVT originated at the free wall of the right ventricular outflow tract. Head-up tilt test and an alcohol provocation test both induced similar SMVT that was associated with hypotension and near syncope. SMVT was not terminated by intravenous administration of lidocaine, procainamide or adenosine triphosphate (10 mg), but was terminated by propranolol. Thus, a beta-adrenoceptor-mediated mechanism appears to play an important role in SMVT in this patient. The site of origin of SMVT might be closely related to the lesion that causes ST-segment elevation.

Adult↗

[From normative power to human development--the search for upkeep of health].

This paper pretends to introduce a reflection about the notion of sustainable development in planning and generating practices and technologies concerned to health and, particularly, nursing. It questions the current model of development and its implications in health concepts and practices in a perspective of living quality.

Health Behavior↗

[Comparative evaluation using in vitro dissolution tests of various sustained release theophylline preparations].

The author's aim was to compare the dissolution properties of the two newly developed sustained release "A" and "B" tablets containing 3,000 mg and 150 mg theophyllin respectively with the similar foreign preparations on the market. The referent preparations are as follows: Theo-Dur (Astra) and Theo-Dur (Recordati) tablets; Euphyllin and Euphyllin minor (Byk Gulden) retard capsules; Euphyllin retard (Byk Gulden) filmcoated tablets and Aminophyllinum-retard (Lek-Ljubljana) tablets. The dissolution tests were carried out by means of the rotating basket apparatus. The "half-change" method was used for testing the dissolution of the preparations. Evaluating the preparations the optimal dissolution rate found in the literature was taken into consideration. The results of the "B" tablet containing 150 mg theophylline were in good agreement with the findings of the preparations on the market and those indicated in the literature. The "A" tablet containing 300 mg active substance showed significantly slower dissolution rate as the comparative preparation did and as it is regarded optimal by the literature.

Delayed-Action Preparations↗

[Ecology and health in Chile: present and future development].

In response to the progressive environmental deterioration, the Ecological Society of America has made a proposal, called "Sustainable Biosphere Initiative", to do research, teaching and decision making processes on biodiversity, global change and the effects of human activities on environment. The goal of appropriate environmental protection and welfare for mankind includes health and quality of life. Presently, Chile faces a number of environmental problems such as pollution, excessive urban growth, loss of agricultural areas, disposal of solid waste and species extinction. The lack of education and information in Chile, on these problems, is worrisome. The role of universities to overcome this deficit should be crucial in the future sustainable development of Chile.

Chile↗

Sources of Deforestation in Tropical Developing Countries

/ Key causes of tropical deforestation are investigated using cross-sectional data for 90 developing countries for the period 1981-1990. Regression results reveal that deforestation is associated with both development and scarcity. Deforestation accelerates with expanding infrastructure, trade, debt, investment in the human capital base, and resource-based economic expansion. On the other hand, absolute and relative scarcities-manifested by growing population pressures, food and land shortages, fuelwood dependency, and inequalities in access to land-are also key factors explaining forest loss. Thus, results point to a fundamental environmental conundrum: Development is required if countries are to alleviate scarcity-driven forms of forest exploitation but is itself a major cause of deforestation. Can countries balance development goals with forest protection? Setting aside the issue of its practical realization, the paper concludes that forest sustainable development cannot be achieved by implementing simple technical improvements in land-use practices alone. Securing the foundations for the sustainability of the forest base will require that countries address the underlying social processes driving tropical forest loss as well.KEY WORDS: Tropical deforestation; Developing countries; Rural land-use practices; Development; Scarcity.

Journal Article↗

ATP-dependent K+ channels modulate vasoconstrictor responses to severe hypoxia in isolated ferret lungs.

In normo- and hypoglycemic ferret lungs, the pulmonary vascular response to severe hypoxia (PiO2 less than or equal to 10 mmHg) is characterized by an initial intense vasoconstriction followed by marked vasodilation, whereas in hyperglycemic lungs, vasodilation is minimal, causing vasoconstriction to be sustained. In contrast, the response to moderate hypoxia is characterized by a slowly developing sustained vasoconstriction which is unaffected by glucose concentration. To determine the role of ATP-dependent K+ (KATP) channels in these responses, we examined the effects of cromakalim, which opens KATP channels, and glibenclamide, which closes them. During steady-state vasoconstriction induced in isolated ferret lungs by moderate hypoxia, cromakalim caused dose-dependent vasodilation (EC50 = 7 x 10(-7) M) which was reversed by glibenclamide (IC50 = 8 x 10(-7) M), indicating that KATP channels were present and capable of modulating vascular tone. During severe hypoxia in hypoglycemic lungs [( glucose] less than 1 mM), glibenclamide markedly inhibited the secondary vasodilation. Raising perfusate glucose concentration to 14 +/- 0.4 mM had the same effect. As a result, initial vasoconstrictor responses were well sustained. However, neither glibenclamide nor hyperglycemia affected vasoconstrictor responses to moderate hypoxia or KCl, indicating that effects during severe hypoxia were not due to nonspecific potentiation of vasoconstriction. These findings suggest that in the ferret lung (a) severe hypoxia decreased ATP concentration and thereby opened KATP channels, resulting in increased K+ efflux, hyperpolarization, vasodilation, and reversal of the initial vasoconstrictor response; and (b) hyperglycemia prevented this sequence of events.

Adenosine Triphosphate↗

Hemodynamics of cough cardiopulmonary resuscitation in a patient with sustained torsades de pointes/ventricular flutter.

A 43-year-old female with old myocardial infarction and stenosed bypass grafts developed sustained Torsades de Pointes/ventricular flutter (rate = 300-400 beats per minute) during coronary arteriography after contrast injection to the diagonal graft. Cough-CPR (rate = 37/min) was started within 5 s of dysrhythmia initiation and continued through two defibrillation attempts (200 and 360 joules), and IV lidocaine was administered until return of spontaneous circulation 62 s later. The patient never lost consciousness during this very rapid dysrhythmia. Certain cardiac arrest resuscitation measures (namely, initial defibrillation attemps, IV lidocaine administration) can thus be initiated in a patient while performing cough-CPR and maintaining adequate cerebral perfusion. During the dysrhythmia with Cough-CPR: (a) aortic systolic pressures averaged 100 mmHg--this has commonly been observed in other reports, and (b) aortic diastolic pressures were always > or = 50 mmHg and averaged 63 mmHg, which has seldom been this high during cough-CPR. Dysrhythmia reversion occurred 4 s after the second defibrillation attempt and 80 msec after the peak of the highest cough-generated aortic pressure pulse (128 mmHg). Cough-induced ventricular tachycardia reversion has previously been reported; this may have acted in concert with electrical defibrillation to facilitate dysrhythmia reversion. The patient recovered without incident.

Adult↗

Strengthening local health care management in Bolivian districts through participatory operational research.

The purpose of this article is to demonstrate how the use of a participatory health care management and problem-related research methodology may help strengthen health service management and the capacities of local health care personnel. The text refers to five studies carried out in three Bolivian health districts from 1993-1995, in an Operational Research Project, conducted by an Italian N.G.O. (Cooperazione Internazionale) in agreement with the local Ministry of Health and P.A.H.O./W.H.O. The object of these studies was to assess the main problems in health care delivery and to define and implement appropriate solutions. The studies utilized a methodology based on the principles of operational research and continuous quality improvement. During the process some positive aspects and difficulties were met. The positive aspects were: the applied character of the research focused on the solution of a problem; the study of a problem related to health service management; the use of modern and simple techniques adapted to local knowledge; on-the-job training of health care personnel during the research process. Lack of a generic 'culture of research' and poor health personnel training were the main difficulties encountered. National health authorities should take these points into account to define or readjust policies on health service research, health workers' academic education and in-service training. Insisting on developing human resources and allowing them to achieve and expand their potential is the key factor for getting developing countries out of their current crisis and toward reaching a truly human and sustainable development.

Bolivia↗

Prognostic significance of ventricular late potentials in coronary artery disease.

By means of high-gain ECG and signal-averaging techniques, we tried to determine the prevalence and prognostic significance of ventricular late potentials (VLPs) in coronary artery disease (CAD). No VLPs were detected in normal subjects (n = 25) or in patients with various noncoronary cardiopathies with sustained ventricular tachycardia and/or fibrillation (VT/VF) (n = 10). Among 92 CAD patients, VLPs were apparent in 35% (32 of 92) at the beginning of the study. The prevalence of VLPs increased to 48% (19 of 40) in the presence of ventricular aneurysm (VA) and to 82% (14 of 17) in the presence of a history of previous sustained VT/VF. To determine the prognostic significance of VLPs, a prospective analysis was conducted during a mean of 7.4 months (range 1 to 22 months). During the follow-up period, 11 patients (12%) presented with an episode of sustained VT/VF, and six of them died from documented VT/VF. Three other patients died from cardiogenic shock. An episode of sustained VT/VF occurred in 31% (10 of 32) of the patients with VLPs vs 2% (1 of 58) of the patients without VLPs (p less than 0.001), and six patients with VLPs died from sustained VT/VF vs none in the group of patients without VLPs (p less than 0.01). This VLP-related increase in arrhythmic risk was still present in the particular subgroup of patients with a history of previous sustained VT/VF (n = 17) and in patients with VA (n = 40). The risk of developing sustained VT/VF was also influenced by the length of the VLP and by a low mean ejection fraction.(ABSTRACT TRUNCATED AT 250 WORDS)

Action Potentials↗

Future growth in biotechnology in the developing countries.

Conditions in developing countries are nowhere near what they should be to reap the benefits of modern biotechnology. Be that as it may, there are possibilities in which intelligent thinking and rational planning by the people concerned, combined with input from international agencies and national centres of excellence, can lead to potential economic gains. One possibility is the establishment of collaborative research on a regional basis to tackle common problems and to train each other's manpower in acquired skills. Similarity of circumstances would make these programmes more relevant and cost effective. To ensure the success of joint programmes in the local setting, foreign input in the form of finances, provision of critical laboratory materials, and expert advice in the selection of technically solvable problems becomes inevitable. Thus participation by the developed-country agencies and laboratories in the developing countries presents a purposeful pooling of efforts that will sow the seeds for sustainable development of the developing world. Given that, new technology would prove a boon and a blessing for humanity in general and for the developing world in particular.

Academies and Institutes↗

Regulation of endothelin-induced Ca2+ mobilization in smooth muscle cells by protein kinase C.

We have investigated the role of protein kinase C (PKC) in regulating vascular smooth muscle cell responses to endothelin (ET). During the initial phase of the response, ET stimulated rapid formation of diacylglycerol due to rapid and transient activation of phosphatidyl inositol-specific phospholipase C and to rapid and prolonged activation of phospholipase D. Concurrently, ET stimulated translocation of PKC activity that reached a peak at 1 min and remained elevated for at least 20 min. Activation of PKC produced early inhibitory effects. Treatment of cells with phorbol 12-myristate 13-acetate (PMA) 5 min before stimulation with ET inhibited total inositol phosphate formation by > 50%. Because each inositol phosphate isomer was equally affected, the target appears to be either phospholipase C or some upstream component of the receptor coupling mechanism. Activation of PKC was important for sustained response to ET. Treatment of cells with staurosporine significantly reduced sustained elevation of cytosolic free Ca2+ concentration ([Ca2+]i) normally seen with ET. We had previously shown that sustained elevation of [Ca2+]i initiated by ET was due to continued activity of L-type Ca2+ channels. Our current data suggest that PKC is important in this response. For example, staurosporine inhibited both ET-induced 45Ca2+ and Mn2+ entry occurring 10 min after stimulation of influx mechanisms by the agonist. Similarly, pretreatment of cells for 18 h with phorbol dibutyrate depleted the cells of PKC and blocked the sustained activity of Ca2+ entry mechanisms stimulated by ET. Finally, PMA initiated a slowly developing, sustained elevation of [Ca2+]i.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗

Toward a national health risk management approach in Australia.

There has been increasing international consensus about the importance of competition for achieving national growth and community well-being. The Australian government accordingly has introduced policies to promote such competition. Major legislative review and many public inquiries have assisted implementation of national competition policy and the development of national goals and standards related to international agreements to promote health and sustainable development. Since the 1980s, Australia has had legislation that requires the identification and control of health risks arising at work. The management structures necessary for coordinated delivery of national programs designed for effective identification and control of health risks arising in communities to achieve national health and development goals are still being developed, however. Major difficulties related to this development are discussed. National health development programs should be approached primarily through establishment of regional partnerships between bodies responsible for managing community health, local government, and employment placement, in consultation with other relevant organizations and the community. Related research and evaluation programs are required.

Australia↗

Constructed wetlands in UK urban surface drainage systems.

This paper presents the outcome of an inventory of planted wetland systems in the UK which are classified according to land use type and are all examples of sustainable drainage systems. The introduction of constructed wetlands to treat surface runoff essentially followed a 1997 Environment Agency for England and Wales report advocating the use of "soft engineered" facilities including wetlands in the context of sustainable development and Agenda 21. Subsequently published reports by the UK Construction Industry Research and Information Association (CIRIA) have promoted the potential benefits to both developer and the community of adopting constructed wetlands and other vegetated systems as a sustainable drainage approach. In addition, the UK Environment Agency and Highways Agency (HA) have recently published their own design criteria and requirements for vegetative control and treatment of road runoff. A case study of the design and performance of a constructed wetland system for the treatment of road runoff is discussed. The performance of these systems will be assessed in terms of their design criteria, runoff loadings as well as vegetation and structure maintenance procedures. The differing design approaches in guidance documents published in the UK by the Environment Agency, CIRIA and HA will also be evaluated.

Data Collection↗

Using a set of strategic indicator systems as a decision-making support implement for establishing a recycling-oriented society. A Taiwanese case study.

UNLABELLED: BACKGROUND, SCOPE AND AIMS: To realize the vision of sustainable development (SD) originating from the 'only one earth' philosophy, and to integrate the conceptions of ecology and sustainability into the planning and decision-making criteria of urban growth management, the establishment of a recycling-oriented society (ROS) is essential. However, before the above intention can be achieved, it is indispensable to develop a system of strategic indicators for supporting a radical reformation of the urban development plan. Therefore, this study, based on the conception of the new urban development pattern ROS, attempted to carefully choose a sample city in Taiwan for launching a preliminary case study, and furthermore designed and proposed a concise and strategy-oriented assessment indicator system termed ROSAIS. ROSAIS, on the one hand, can act as a compass for understanding resource using efficiency and recycling status during city development and, on the other hand, can serve as an implement supporting decision-making for ROS construction. METHODS: According to the definition and spirit of ROS, the structure of ROSAIS should clearly represent the relationship between resources and environment in human activities. The eco-efficiency indicator system (EEIS) and environmental symbiosis indicator system (ESIS) can be considered two key subindicator systems, and are the necessary components of ROSAIS. EEIS chooses the dominant production sectors in urban economic activities to calculate their eco-efficiency (EE). Separately, for obtaining a consensus regarding the framework of ESIS, the questionnaire approaches and expert consultation, together with the research experience and foundation of current relevant studies and indicator systems, are applied when crucial resource and environmental issues and respective indicators are selected. RESULTS AND DISCUSSION: The calculation results of EEIS in this case study indicated that among the three dominant production activities (agricultural, fishery, and animal husbandry sector) the fishery sector has the highest EE, which indicates that the fishery activities and resources significantly influence the sustainability of the economic-environmental system of the sample city. Furthermore, according to a consensus achieved in ESIS, local green spaces, resource recovery, energy consumption pattern change, freshwater conservation and greenhouse effect abatement were considered as the five crucial issues influencing how the case study city can develop into an ES-city. The rate of local green spaces, resource recycling, freshwater conservation and the rate of reduction of nonrenewable energy use as well as carbon dioxide (CO2) emissions were used to evaluate the above five issues. CONCLUSION: This case study is unparalleled in Taiwan. Even in Japan, where ROS legislation has been implemented, this kind of study remains in the preliminary stages. Furthermore, when communicating the indicator results, it is essential to provide the context and countermeasures of the crucial issues that are faced. The two sub-indicator systems proposed in this case study could comply completely with the above-mentioned requirements. For example, the EEIS provides information for achieving a balance between environmental burden and economic benefits among dominant production sectors; the ESIS provides information for setting strategies for overcoming the crucial issues faced. RECOMMENDATION AND OUTLOOK: This study recommends that urban planers should consider the construction of the corresponding strategic indicator system to be indispensable, and makes further use of the indicator results related to the environmental education of residents for identifying and promoting participation with ROS, and turning them into implements for supporting urban SD decision-making. Furthermore, a successful indicator system depends on data availability and quality. This study recommends that urban planers should pay considerable attention to constructing relevant data collection channels, databases and the data quality.

Cities↗