PubMed Health⌕ Search

Biomedical subjects

B Bonner

Publications and source records attributed to B Bonner.

9 recordsLinked to original sources
PubMed2002

Lambda spectra in 11.6A GeV/c Au-Au collisions.

E896 has measured Lambda production in 11.6A GeV/c Au-Au collisions over virtually the whole rapidity phase space. The midrapidity p(t) distributions have been measured for the first time at this energy and appear to indicate that the Lambda hyperons have different freeze-out conditions than protons. A comparison with the relativistic quantum molecular dynamics model shows that while there is good shape agreement at high rapidity the model predicts significantly different slopes of the m(t) spectra at midrapidity. The data, where overlap occurs, are consistent with previously reported measurements.

Journal Article↗
PubMed1999

Up-training loading responses in older adults.

This randomized, experimental-control group, multiple-observation study examined the ability of older adults to use center of pressure feedback to up-train the vertical loading response (LR) and the impact that such training had on changes in clinical tests of balance. Eleven community ambulators, aged at least 65 years, with no recent history of falls were recruited by convenience sampling. Each group received 6 baseline sessions and 6 control/training sessions, followed by 1 posttest session. All sessions included visual cueing about stance equilibrium followed by 30 randomly timed dynamic, toes-up perturbations (8 degrees, 66 degrees per second). Training consisted of verbal instructions with visual and auditory feedback of a 225 msec response window to shape an increase in total LR following perturbations. Subjects in the experimental group demonstrated a tendency to decrease vertical loading relative to baseline regardless of visual and verbal feedback encouraging strategies to increase it. Specifically, the T3 or 150-225 msec component of the response window showed a decline from session 7 to session 12. Up-training, however, appears to cause a faster rate of rise to the maintenance window, but this event probably occurs too late to correct for a loss of balance. No correlation was found between change in load values and change in performance on clinical balance tests.

Accidental Falls↗
PubMed1994

A survey of health care and child protective services provider knowledge regarding the toe tourniquet syndrome.

Recent efforts to increase public awareness of child abuse may result in an increased number of inappropriate reports of suspected child abuse. The authors believe that digital hair strangulation should be included among the conditions that may be confused with child abuse. Digital hair strangulation (toe tourniquet syndrome) occurs primarily in infants and is characterized by a constricting band of foreign material that becomes tightly wrapped around a digit or digits (most often the toes). The consensus in the medical literature is that this condition is not the result of intentional injury. As no reference to the toe tourniquet syndrome exists in the child abuse literature, it was hypothesized that child welfare workers would be more likely than physicians and public health nurses to misinterpret this condition as resulting from intentional injury. A survey was conducted to test this hypothesis. Professionals from the fields of medicine, nursing, and child welfare were provided with a history and photographic findings of a child with a typical case of the toe tourniquet syndrome. Participants were surveyed regarding their interpretation of the described injuries. More than 50% of all respondents indicated that they would report this case as suspected abuse. Child welfare workers responded that the injuries were suggestive of abuse (83%), significantly more often than public health nurses did (45%), (chi 2 = 4.55, p = .03).(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1990

Pediatric cardiopulmonary arrests in rural populations.

We reviewed emergency department records that spanned a period of 5 years at seven rural hospitals to provide more specific data concerning pediatric resuscitation. The purpose was to plan better for preventive programs and to help rural health care providers prepare better for these difficult patients. Patients entered in the study had either cardiorespiratory arrest or respiratory arrest. Although the distribution by age was similar to studies from other areas, the outcome for cardiorespiratory arrests was as bad or worse (70 arrests with 3 survivors), and the outcome of respiratory arrests was as good or better (25 arrests with 21 survivors) as reported previously. Survival of arrest from trauma and accidents was markedly worse (16%) than survival from nontraumatic arrests (44%). The etiologies of the arrests were dominated by sudden infant death syndrome and pulmonary disease but with very few drownings or farm-related fatalities. This study should encourage rural health care providers to increase efforts in specific areas of trauma and accident prevention. Also, respiratory illness needs to be monitored aggressively and respiratory arrests treated more effectively to avoid the much more consistently lethal cardiac arrests. In addition, more careful prospective study of these patients may be able to identify care patterns that can be improved to increase survival in these groups.

Adolescent↗
PubMed1987

Anaemia in juvenile chronic arthritis: serum inhibition of normal erythropoiesis in vitro.

Serum from patients with juvenile chronic arthritis (JCA) was shown to inhibit colony formation by normal erythropoietic progenitor cells cultured in vitro. The inhibition was proportional to the degree of anaemia and to certain indices of activity of the arthritis and systemic disease. It occurred in a dose dependent manner with increasing serum concentration and was independent of previous blood transfusion or administered drugs. Erythropoietic progenitor cells from the bone marrows of anaemic patients with JCA showed normal requirements for accessory cells (T lymphocytes and macrophages) in culture, and autologous accessory cells were not deficient in providing normal growth requirements.

Adolescent↗
PubMed1985

Stimulation of bone marrow erythropoiesis by T lymphocytes of anaemic patients with rheumatoid arthritis.

An inappropriate response of the bone marrow is implicated in the aetiology of the anaemia of chronic disease complicating rheumatoid arthritis. T lymphocyte subsets have been shown to inhibit early erythroid development in vitro in association with some cases of bone marrow failure, and an expanded peripheral blood pool of these cells is reported in rheumatoid arthritis. We have studied the role of peripheral blood T lymphocytes in erythroid bone marrow culture from seven normal volunteers and nine anaemic patients with rheumatoid arthritis and found comparable stimulation of growth in both groups.

Adult↗
PubMed1981

The dying patient -- attitudes and responses.

This study was designed to ascertain the attitudes and responses of the dying patient, both to himself and to those around him, particularly the medical care team. The sample chosen consisted of 75 patients suffering from various terminal illnesses. We studied the patients' reactions on being told about their illness, the manner in which they were told, how they reacted to their illness and the way the medical care team, family and friends treated them. The role of religion as a support system with regard to 'accepting death' was investigated. Recommendations regarding doctor-patient relationships are made.

Adolescent↗
PubMed1981

A practical procedure for measuring functional residual capacity during mechanical ventilation with or without PEEP.

The measurement of functional residual capacity (FRC) in patients receiving mechanical ventilation may provide valuable data in the assessment and management of acute respiratory failure. Previous descriptions of apparatus and techniques for FRC measurement have either been inapplicable to patients receiving positive end-expiratory pressure (PEEP), or insufficiently detailed to allow convenient duplication in the clinical setting. The authors describe a helium rebreathing method for bedside determination of FRC which can be performed during ventilation with PEEP and which is applicable in patients with prolonged equilibration times. The method is both reproducible in patients (variation from mean FRC: +/- 2.2%) and accurate (coefficient of variation from in vitro FRC of 3000 ml: +/- 1.7%). The apparatus and assembly are described in detail and require only components which are readily available commercially, so that they may be applicable to clinical use in a general hospital.

Adult↗