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Biomedical subjects

G Haynes

Publications and source records attributed to G Haynes.

17 recordsLinked to original sources
PubMed2001

Mental health issues in the workplace: a case for a new managerial approach.

Anger, stress, and depression in the workplace are growing concerns among management. Traditionally, health outcomes have functioned under the realm of workplace health professionals. This study assessed whether a traditional worksite health promotion program had an impact on mental health factors. The results suggested that worksite health promotion programs play a limited role in ameliorating work-related mental health outcomes. Rather, management must play a greater role in addressing workplace stress, anger, and depression.

Anger↗
PubMed2001

Deaths attributed to pediatric complex chronic conditions: national trends and implications for supportive care services.

BACKGROUND: Children with complex chronic conditions (CCCs) might benefit from pediatric supportive care services, such as home nursing, palliative care, or hospice, especially those children whose conditions are severe enough to cause death. We do not know, however, the extent of this population or how it is changing over time. OBJECTIVES: To identify trends over the past 2 decades in the pattern of deaths attributable to pediatric CCCs, examining counts and rates of CCC-attributed deaths by cause and age (infancy: <1 year old, childhood: 1-9 years old, adolescence or young adulthood: 10-24 years old) at the time of death, and to determine the average number of children living within the last 6 months of their lives. DESIGN/METHODS: We conducted a retrospective cohort study using national death certificate data and census estimates from the National Center for Health Statistics. Participants included all people 0 to 24 years old in the United States from 1979 to 1997. CCCs comprised a broad array of International Classification of Diseases, Ninth Revision codes for cardiac, malignancy, neuromuscular, respiratory, renal, gastrointestinal, immunodeficiency, metabolic, genetic, and other congenital anomalies. Trends of counts and rates were tested using negative binomial regression. RESULTS: Of the 1.75 million deaths that occurred in 0- to 24-year-olds from 1979 to 1997, 5% were attributed to cancer CCCs, 16% to noncancer CCCs, 43% to injuries, and 37% to all other causes of death. Overall, both counts and rates of CCC-attributed deaths have trended downward, with declines more pronounced and statistically significant for noncancer CCCs among infants and children, and for cancer CCCs among children, adolescents, and young adults. In 1997, deaths attributed to all CCCs accounted for 7242 infant deaths, 2835 childhood deaths, and 5109 adolescent deaths. Again, in 1997, the average numbers of children alive who would die because of a CCC within the ensuing 6-month period were 1097 infants, 1414 children, and 2548 adolescents or young adults. CONCLUSIONS: Population-based planning of pediatric supportive care services should use measures that best inform our need to provide care for time-limited events (perideath or bereavement care) versus care for ongoing needs (home nursing or hospice). Pediatric supportive care services will need to serve patients with a broad range of CCCs from infancy into adulthood.

Adolescent↗
PubMed1995

Prevalence of antibodies to hepatitis C virus and other markers in Jamaica.

Three population groups, 1500 blood donors, 513 antenatal women representing a normal population group and 250 sicklers representing a multiply transfused group were studied to determine the prevalence of hepatitis C viral (HCV) infection in Jamaica. The relationship to liver enzyme levels, hepatitis B infection, syphilis and HIV infection was also investigated. Sera were screened by enzyme-linked immunoassay (EIA) for anti-HCV C100-3 and subsequently tested by a supplementary second generation recombinant immunoblot assay (RIBA). In the blood donors, the prevalence of anti-HCV was low, 0.3%-0.4%, the same level as that reported by several European countries. In the multiply transfused sicklers, the prevalence was more than seven times higher. No HCV infection was detected in the antenatal group. There was little correlation between HCV infection and surrogate markers alanine aminotransferase (ALT) and antibody to hepatitis B core antigen (anti-HBc) and no correlation with sexually transmitted diseases.

Adult↗
PubMed1992

A prospective study of transmission by transfusion of HTLV-I and risk factors associated with seroconversion.

To evaluate the risk of transfusion-related transmission of HTLV-I in Jamaica, a prospective study was initiated, prior to availability of a licensed HTLV-I serological screening assay. This information would prove useful in formulating strategies for blood-donor screening. We followed 118 pre-transfusion HTLV-I-negative transfusion recipients at monthly intervals post-transfusion for 1 year. Laboratory and questionnaire data were obtained at each visit to evaluate the clinical and immunological status of recipients. Cumulative incidence of HTLV-I seroconversion was estimated and risk-factor data associated with seroconversion among 66 HTLV-I-exposed transfusion recipients were analyzed. Seroconversion occurred in 24/54 (44%) of recipients of HTLV-I-positive cellular blood components, 0/12 recipients of positive non-cellular donor units and 0/52 recipients of HTLV-I-negative donor units. Significant risk factors associated with recipient seroconversion were receipt of a seropositive cellular blood component stored for less than one week [odds ratio (OR) = 6.34, 95% confidence interval (CI) = 1.83 to 21.92], male sex (OR = 4.79, 95% CI = 1.15 to 20.0) or use of immuno-suppressive therapy at time of transfusion (OR = 12.20, 95% CI = 0.95 to 156). Risk of blood-borne infection per person per year in Jamaica was estimated to be 0.009%. Our results confirm that blood transfusion carries a significant risk of HTLV-I transmission and that screening of donor blood effectively prevents HTLV-I seroconversion. Recipients at greatest risk for seroconversion were those who required multiple transfusions or who were receiving immunosuppressive therapy at the time of transfusion. These patients should be given priority in receiving selectively screened blood components, if universal blood-donor screening for HTLV-I is not possible.

Blood Donors↗
PubMed1992

Immunoglobulin heavy chain variable region gene utilization by B cell hybridomas derived from rheumatoid synovial tissue.

Rheumatoid arthritis (RA) is a chronic inflammatory disease that primarily affects synovial joints. Activated B lymphocytes and plasma cells are present in the synovial tissue and are thought to contribute to the immunopathology of the rheumatoid joint. To investigate rheumatoid synovial B lymphocytes, we have generated B cell hybridomas from synovial tissue of an RA patient. Here we describe the immunoglobulin VH gene repertoire of eight IgM- and 10 IgG-secreting synovial-derived hybridomas. The VH4 gene family is highly represented (38.5%) in this panel of hybridomas compared with the frequency of VH4 gene expression in circulating B lymphocytes reported previously (19-22%) and with the VH4 gene frequency we observed in a panel of hybridomas derived in the same manner from the spleen and tonsil of normal individuals (19%). The increased frequency of VH4 gene expression was not due to the expansion of a single B cell clone in vivo as none of these hybridomas was clonally related. Two synovial-derived hybridomas secreted autoantibodies; one (VH3+) secreted an IgM-rheumatoid factor (RF) and the other (VH4+) secreted IgM with polyreactive binding to cytoskeletal proteins and cardiolipin. The antibodies secreted by the remaining synovial-derived hybridomas were not reactive with the autoantigens tested. The VH gene usage in a proportion (5/17) of synovial-derived hybridomas that expressed CD5 antigen provided preliminary evidence that CD5+ B cells in RA synovium have a similar increase of VH4 gene expression reported for CD5+ B cells from normal individuals and patients with chronic lymphocytic leukaemia.

Adult↗
PubMed1991

Detection of early human T-cell lymphotropic virus type I antibody patterns during seroconversion among transfusion recipients.

From a cohort of human T-cell lymphotropic virus type I (HTLV-I) exposed transfusion recipients (N = 71) enrolled in the Jamaican Transfusion Study, 11 were selected for detailed laboratory evaluation. All recipients were followed at monthly intervals for 6 months and then bimonthly up to 1 year for evidence of HTLV-I seroconversion. Without regard to results on screening assays, pretransfusion and posttransfusion samples were tested with two licensed HTLV-1 whole-virus screening enzyme immunoassays (EIAs), recombinant EIAs for antibody against tax (p40x) and p21e envelope, standard whole virus Western blot (WB), WB enhanced with recombinant p21e, and radioimmunoprecipitation assay (RIPA). In the early period posttransfusion, antibody to gag core protein was predominant with anti-p24 generally appearing before anti-p19. Recombinant anti-p21e envelope protein, in EIA and WB format, was frequently the earliest envelope reactivity detected, while anti-gp46 in WB and anti-gp61/68 in RIPA system appeared later. Anti-tax antibodies appeared later in the time course of seroconversion. The whole-virus EIAs were less sensitive than the confirmatory assays. The combination of WB and RIPA or WB enhanced with recombinant p21e appeared equally effective in confirming samples as positive by the Public Health Service two gene group confirmatory algorithm. However, specificity of this assay approach could not be addressed in this study.

Adolescent↗
PubMed1978

Enflurane nephrotoxicity and pre-existing renal dysfunction.

This study provides the first morphological evidence of significant structural damage following high doses of enflurane alone and confirms previous findings of transient renal functional abnormalities following high dosage enflurane. The study also indicates that enflurane may have a greater potential for renal toxicity in the presence of renal impairment. Treatment of Fischer 344 rats with a nephrotoxic dose of gentamicin prior to six hours of enflurane (GE) anaesthesia at 1 MAC resulted in increased serum concentration of the enflurance metabolite inorganic fluoride (GE, 43.9 +/- 1.5; E, 34.5 +/- 1.8 mu mol/L), increased urine flow rate and a greater degree of structural damage in renal proximal convoluted tubule cells than was observed with either gentamicin (G) or enflurane (E) alone. Treatment with gentamicin prior to enflurane also resulted in reduced urinary osmolality compared to enflurane or gentamicin alone (GE, 742 +/- 57; E, 1709 +/- 66; G, 985 +/- 32 m0sm/kg).

Anesthesia, Inhalation↗
PubMed1977

Symptomatic treatment of diarrhea with bismuth subsalicylate among students attending a Mexican university.

Students attending a Mexican university who developed diarrhea were randomly treated with bismuth subsalicylate or a placebo. One hundred and eleven were given 30 ml each 1/2 hr until eight doses (total dose of active drug 4.2 g) were given and 58 students received twice this dose (8.2 g of active drug) over the 3 1/2-hr treatment period. The number of unformed stools was significantly decreased in both bismuth subsalicylate treatment groups compared to the placebo controls for the period 4 to 24 hr after therapy. A reduction in diarrhea was additionally noted for the duration of the 48-hr surveillance period for the students receiving the higher dose of active drug. Subjective relief within 24 hr of therapy of the symptoms of diarrhea, nausea, and abdominal pain or cramps was reported with a significantly increased frequency in the bismuth subsalicylate group. The most pronounced effect of the treatment occurred in the United States students with diarrhea who had recently arrived in Mexico. This appeared to be related to the favorable effect of bismut subsalicylate on the course of toxigenic Escherichia coli infection. Students with shigellosis did not experience a prolonged illness in either treatment group.

Bismuth↗
PubMedDate not supplied

The relationship between the stages of exercise adoption and other health behaviors.

PURPOSE: To examine the relationship between stage of exercise adoption and the practice of other health behaviors. DESIGN: Demographic, socioeconomic, and health behavior data were collected using a cross-sectional mail survey. Data were collected as part of a larger employee benefits research study. SETTING: Montana State University-Bozeman, Bozeman, Montana. SUBJECTS: University employees (n = 1269) comprised of 46% men with a mean age of 44 years. MEASURES: Demographic and socioeconomic data included age, sex, marital status, level of income and education, dependent status, and job classification. Stage of exercise adoption classifications were based on self-reported responses to four exercise statements. The health behaviors included in this study were cigarette and smokeless tobacco use, seat belt use, alcohol use, and use of stress management practices. Logistic regression analysis was used to determine if stage of exercise predicted the presence of each of the health behaviors while controlling for demographic, socioeconomic, and other health behavior variables. RESULTS: The survey response rate was 68%. Respondents in action exercise stage (p = .0367) were less likely to smoke cigarettes than respondents in precontemplation stage of exercise. Respondents in contemplation (p = .0419), preparation (p = .0060), action (p = .0432), and maintenance (p = .0006) were more likely to use seat belts than respondents in precontemplation. Respondents in maintenance (p = .0059) were more likely to use regular stress reduction techniques than respondents in precontemplation. CONCLUSIONS: Although longitudinal research is needed to determine any causal relationships, this research suggests that encouraging individuals to become more involved in exercise could indirectly influence other health behaviors. Hence, exercise could be a possible "gateway" behavior toward healthier lifestyle practices.

Adult↗
PubMedDate not supplied

The relationship between the stages of change for exercise and health insurance costs.

OBJECTIVE: To determine the relationship between the stages of exercise participation and health insurance costs. METHODS: A hurdle model was used to examine health survey and health insurance costs data by stage of exercise participation. RESULTS: Employees classified in the maintenance stage (regular exercisers) of exercise adoption had lower costs and a lower probability of being classified in the high-cost group than did employees classified in the other stages of change for exercise participation. CONCLUSION: This study offers evidence that the health insurance of individuals classified in the maintenance stage of exercise costs less than does that of individuals classified in other stages of exercise adoption.

Adult↗
PubMedDate not supplied

Night nurse practitioners are not 'mini-doctors'.

Nurse practitioner programmes should be negotiated between service and education. The contribution of experienced course participants should be valued through adult-centred learning strategies. The programme leader should be experienced in facilitation and have credible clinical experience; he/she will utilize the expertise of appropriately skilled lecturers. Clinical skills must be set within the context of professional accountability and within the principles of professional practice (UKCC). Assessment of practice leads to competence and theory assessments to credit rating and APL/APEL. Role development is concerned with understanding accountability and not with accepting junior doctor's tasks.

Humans↗