A Dose-Response Analysis of Methoxychlor-Induced Alterations of Reproductive Development and Function in the Rat

A Dose-Response Analysis of Methoxychlor-Induced Alterationsof Reproductive Development and Function in the Rat. GRAY, L.E., JR., OSTBY, J., FERRELL, J., REHNBERG, G., LINDER, R., COOPER,R., GOLDMAN, J., SLOTT, V., AND LASKEY, J. (1989). Fundam. Appl.Toxicol12, 92–108. In the present study rats were dosed fromweaning, through puberty and gestation, to Day 15 of lactationwith methoxychlor at 25, 50, 100, or 200 mg/kg/day. Morphologicallandmarks of puberty were measured, including the ages at vaginalopening, first estrus, and first estrous cycle in females andat preputial separation in males. In the female, estrous cyclicity,fertility, litter size, number of implantation sites, organweights, and ovarian and uterine histology were also measured.The viability of the offspring (F1) and their fertility wereevaluated using a continuous breeding protocol. Males were necropsiedafter breeding, the reproductive organs were weighed, and thecauda epididymal sperm counts were determined. One testis wasused for histopathology, while the other was used to quantifyinterstitial fluid (IF) content, IF testosterone concentration,and testicular sperm production. Testosterone and an drogen-bindingprotein were measured in the caput epididymis, and sperm motilityand morphology were evaluated from a caudal sample. The serumand pituitary were saved for hormonal determinations. Methoxychloraccelerated the age at vaginal opening and first estrus, andthe vaginal smears were cornified. Growth was retarded at 100and 200 mg/kg/day and fertility was reduced when the femaleswere bred with untreated or similarly treated males. In thehighest- dose group, the mated females went from constant estrusinto pseudopregnancy following mating, but they had no implants.In males, methoxychlor treatment markedly reduced growth, seminalvesicle weight, cauda epididymal weight, caudal sperm content,and pituitary weight. Puberty was delayed in the two highest-dosagegroups. Testicular sperm measures were much less affected thancaudal measures. Testis weight and histology were slightly affected,and testicular sperm production, sperm morphology, and motilitywere unaffected. Endocrine function of the testes and pituitarywas altered by methoxychlor administration. Leydig cell testosteroneproduction, in response to human chorionic gonadotropin challenge,was reduced and pituitary levels of prolactin, thyroid-stimulatinghormone (TSH), and follicle-stimulating hormone (FSH) were altered.In contrast, serum levels of prolactin, FSH, and luteinizinghormone were unaffected. Serum TSH was reduced by 50% of controlat 100 and 200 mg/kg/day, while pituitary levels were increased.Gonadotropin-releasing hormone concentration in the mediobasalhypothalamus was also elevated. In spite of the many reproductivealterations, the fertility of treated males was not reducedwhen they were mated with untreated females. Growth and viabilityof the offspring (F1) from the 50 mg/kg/day treatment groupwere normal, but in the females, vaginal opening was accelerated,estrous cyclicity was abnormal in the rats during middle age,and fecundity was reduced.     

Health promotion and environmental management: a partnership for the future

Health Promotion as a professional practice is facing its thirdmajor challenge this century. To the infectious diseases ofthe past and the lifestyle risks of the present have been addedthe global environmental hazards of the future. Each wave of health risk has three things in common. The firstis that ill-health results from a change in the relationshipbetween the environment and society. The second is that theill-health so caused falls predominantly on already disadvantagedgroups in the community. Third in each case there is a tunelag of two or more decades between recognition of the freshrisks to health and effective professional response. The challengetoday is to shorten the lead time for responding to the thirdphase, the degradation of the global environment. This willgive a radical reorientation to the field of health promotion,which has traditionally safe guarded the health of people fromenvironmental change, not vice versa. The reorientation of health promotion is discussed in termsof the contributions which health promotion can make to environmentalmanagement. The options for managing environmental change areidentified as protection, prevention, resilience and adaptation.These strategies are already in use in the different branchesof health promotion.     

A national survey of computerized decision support systems available to nurses in England

Aim  To examine the characteristics of computerized decision support systems (CDSS) currently available to nurses working in the National Health Service (NHS) in England.
Method  A questionnaire survey sent to a stratified random sample of 50% of all NHS care providers (Trusts) in England, asking respondents to provide information on CDSS currently used by nurses.
Results  Responses were received from 108 of the 277 Trusts included in the sample. Electronic patient record systems were the most common type of CDSS reported by Trusts ( n  = 61) but they were least likely to have features that have been associated with improved clinical outcomes.
Conclusions  The availability of CDSS with features that have been associated with improved patient outcomes for nurses in the NHS in England is limited. There is some evidence that the nature of the Trust affects whether or not nurses have access to CDSS to assist their decision making.
Implications for nursing management  The implementation of CDSS is increasing throughout the NHS. Many CDSS are introduced without adequate evidence to support its introduction and there is little evaluation of the benefits once they are implemented. Policy makers and nursing management should consider whether the introduction of CDSS aids nurse decision making and benefits patient outcomes.     

Identifying Opportunities to Strengthen the Public Health Informatics Infrastructure: Exploring Hospitals’ Challenges with Data Exchange

Policy Points

• Even though most hospitals have the technological ability to exchange data with public health agencies, the majority continue to experience challenges.
• Most challenges are attributable to the general resources of public health agencies, although workforce limitations, technology issues such as a lack of data standards, and policy uncertainty around reporting requirements also remain prominent issues.
• Ongoing funding to support the adoption of technology and strengthen the development of the health informatics workforce, combined with revising the promotion of the interoperability scoring approach, will likely help improve the exchange of electronic data between hospitals and public health agencies.

ContextThe novel coronavirus 2019 (COVID‐19) pandemic has highlighted significant barriers in the exchange of essential information between hospitals and local public health agencies. Thus it remains important to clarify the specific issues that hospitals may face in reporting to public health agencies to inform focused approaches to improve the information exchange for the current pandemic as well as ongoing public health activities and population health management.MethodsThis study uses cross‐sectional data of acute‐care, nonfederal hospitals from the 2017 American Hospital Association Annual Survey and Information Technology supplement. Guided by the technology‐organization‐environment framework, we coded the responses to a question regarding the challenges that hospitals face in submitting data to public health agencies by using content analysis according to the type of challenge (i.e., technology, organization, or environment), responsible entity (i.e., hospital, public health agency, vendor, multiple), and the specific issue described. We used multivariable logistic and multinomial regression to identify characteristics of hospitals associated with experiencing the types of challenges.FindingsOur findings show that of the 2,794 hospitals in our analysis, 1,696 (61%) reported experiencing at least one challenge in reporting health data to a public health agency. Organizational issues were the most frequently reported type of challenge, noted by 1,455 hospitals. The most common specific issue, reported by 1,117 hospitals, was the general resources of public health agencies. An advanced EHR system and participation in a health information exchange both decreased the likelihood of not reporting experiencing a challenge and increased the likelihood of reporting an organizational challenge.ConclusionsOur findings inform policy recommendations such as improving data standards, increasing funding for public health agencies to improve their technological capabilities, offering workforce training programs, and increasing clarity of policy specifications and reporting. These approaches can improve the exchange of information between hospitals and public health agencies.     

The effect of caput succedaneum on oxygen saturation measurements

Summary. Advances in oximetry have allowed the obstetrician to measure oxygen saturation in the fetus with non-invasive transcutaneous techniques. The influence of caput succedaneum formation on the oxygen saturation results obtained with a pulse oximeter was studied in 30 newborn infants. Caput was associated with a reduced oxygen saturation reading (mean reduction of 15%; P <0^.001). This effect is partly due to a true drop in local tissue oxygenation but is exacerbated by a systematic error intrinsic to the physics of spectrophotometry. If continuous intrapartum oximetry is ever to become a part of routine obstetric monitoring then probes that pass through the cervix beyond the caput of the presenting part will be required if erroneously low readings are to be avoided.     

Exteroceptive suppression of temporalis and masseter muscle activity is enhanced in offspring of hypertensives

Exteroceptive suppression of temporalis and masseter muscle activity was examined in young men with and without a parental history of hypertension. Recent clinical studies suggest that the second exteroceptive suppression period is attenuated in several chronic pain disorders and that this brainstem reflex may serve as a noninvasive index of endogenous pain control. In the present study, offspring of hypertensives exhibited a significant protraction of the late exteroceptive suppression period for both muscle sites, suggesting that the decreased pain sensitivity previously observed in individuals at risk for hypertension may be related to enhanced central pain modulation.     

The survival roles of children of alcoholics: their measurement and validity

Scales to measure five survival rules proposed by Black (1979) and Wegscheider (1976) as characteristic of children of alcoholics were developed and tested among a sample of 112 adolescents. Scales representing the lost child, the acting out child, and the mascot were highly intercorrelated, but use of the placater role was relatively unrelated to other roles. The relationship between parental drinking and role use was examined using hierarchical multiple regression which controlled for sex, age and three family variables, intimacy, deliberateness and cohesiveness. Parental alcoholism contributed to children adopting the acting out role, did not contribute to explaining variation in the lost child and mascot roles, but was the sole predictor of the adoption of the responsible child role. In the case of the placater role, controlling family deliberateness led to the emergence of a previously masked relationship with parental alcoholism. The survival roles appear to be as much a response to family disorganization as to parental alcoholism.