Este estudo teve como foco a vivência da família no método canguru (MC) com os seguintes objetivos: identificar o significado para mãe e família dessa experiência, compreender o funcionamento da dinâmica familiar decorrente da permanência da mãe e do filho no MC, apreender as transformações familiares provenientes da permanência no método e construir um modelo teórico sobre a experiência. A coleta de dados foi realizada por meio de entrevista e observação. Entrevistou-se 26 pessoas, membros de 18 famílias assistidas na enfermaria canguru no Hospital das Clínicas – UFMG. Utilizou-se como referencial teórico o Interacionismo Simbólico e como método a Grounded Teory. Dos dados emergiram os fenômenos; TENDO EVOLUÇÃO E DESFECHO NÃO ESPERADOS NA GESTAÇÃO, que é uma fase em que os pais se deparam com a gravidez e sofrem diante da gestação interrompida; DEPARANDO COM A PREMATURIDADE DO FILHO, em que os pais entram no mundo da prematuridade, constatando a necessidade de agir pela sobrevivência do filho, e VIVENDO A DECISÃO E A EXPERIÊNCIA JUNTO DO FILHO, que revela a possibilidade ou não de entrar e permanecer no MC hospitalar. A partir desses fenômenos, foi possível chegar à categoria central Pesando riscos e benefícios entre estar com o filho no canguru ou com a família. / This study focuses on the family way of life in the kangaroo method (KM) with the following objectives: to identify the meaning of this experience for mother and family, to understand the functioning of the family dynamics resulting from the mother and child’s permanence in this method, to capture family transformations in view of the permanence in the method, and to construct a theoretical model about the experience. Data were collected by means of interviews and observation. 26 persons were interviewed, who are part of 18 families who attend kangaroo nursing care at the Hospital das Clínicas of the Federal University of Minas Gerais (UFMG), Brazil. The study used Symbolic Interactionism as a theoretical reference base and Grounded Theory as a method. The following phenomena arose from these data: HAVING UNEXPECTED EVOLUTION AND OUTCOME IN PREGNANCY, which is a phase in which the parents suddenly confront the pregnancy and have to deal with a premature birth; CONFRONTING THE PREMATURITY OF THE CHILD, in which the parents enter the world of prematurity and confirm the need to act in favor of the child’s survival; and LIVING WITH THE DECISION AND THE EXPERIENCE TOGETHER WITH THE CHILD, which reveals whether or not the parents will decide to enter and stay at the hospital’s KM. From these phenomena, we arrived at the central category: Weighing the risks and benefits between staying with the child in kangaroo method or with the family.

Objective: To describe the breastfeeding characteristics of late-preterm infants (LPIs) in a kangaroo mother care unit (KMC). Materials and methods: In a 20-bed KMC unit, the breastfeeding of 73 purposively-selected LPIs’ (mean gestational age: 34.8 weeks) was observed once-off, using the Preterm Infant Breastfeeding Behavior Scale. Participants’ mean age was 9.5 days, mean number of days in the unit was 3.1 days, and mean number of days breastfeeding was 7.5 days on observation. Results: Only 13.7% of participants were directly breastfeeding without supplementary tube-feeding/cupfeeding and 86.3% received supplementary cup-feeding of expressed breast milk. Most participants did not exhibit obvious rooting (83.5%) and although most latched-on (97.3%), those who did, latched shallowly (93%). The mean longest sucking burst was 18.8 (SD: 10.5) and approximately half the participants swallowed repeatedly (53.4%). The mean breastfeeding session duration was 17.8 minutes but most participants breastfed less than 10 minutes (76.7%). No statistically significant associations were found between chronological age and breastfeeding characteristics. A general trend towards more mature behaviors in participants breastfeeding for more days was present for many breastfeeding characteristics. More infants exhibited the most mature behavior for each breastfeeding characteristic when the environment was quiet, rather than noisy and disturbing, except for depth of latching (quiet: 0%, disturbance: 15.2%). Conclusion: LPIs in this sample presented with subtle, moderate breastfeeding difficulties, highlighting their need for breastfeeding support. Further research is required to examine the effect of KMC on breastfeeding in LPIs. / Dissertation (MA)- University of Pretoria, 2017. / Speech-Language Pathology and Audiology / MA / Unrestricted

The implementation of developmental care in South Africa seems problematic. As an effective care approach, developmental care (DC) reduces short- and long-term sequelae for pre-term and sick infants. This study therefore investigates and documents how DC can be implemented successfully in a South African context. The research design chosen, intervention design and development, has six phases: problem analysis and project planning, information gathering and synthesis, design, implementation, evaluation and advanced development, and dissemination. The sixth phase fell outside this study’s scope. Phase One, problem analysis and project planning, involved analysing and describing the level of DC practiced at the research site before implementation, and planning the implementation of DC in a South African public NICU. Planning involved consulting relevant literature and the multidisciplinary team of the NICU. Phase Two, information gathering and synthesis, consisted of identifying the factors involved in DC implementation from national and international examples of such implementation in neonatal intensive care. These factors were derived from available literature and other resources, including institutions where DC and kangaroo-mother care have been implemented, to provide a contextual framework for the intervention plan. The intervention plan for DC implementation at the research site was designed in Phase Three, based on the information gathered in Phase Two. The plan consisted of descriptive representations of the realities of clinical practice combined with applicable theoretical perspectives on the practice of DC. Guidelines for implementing DC were established as part of the plan. Phase Four involved the execution of the intervention plan in a South African public NICU, with participation from members of the multidisciplinary team. The intervention plan was refined and developed further in Phase Five, through monitoring and evaluating DC principles in the NICU. The guidelines were validated by an expert group. The study used Lincoln and Guba’s model (1985: 305) to ensure trustworthiness. No experimental and control groups were used as DC was implemented uniformly in the NICU, with all infants receiving this care. Harm or damage to research participants were not expected, as DC implementation benefits them and improves their working environment. Confidentiality was ensured for all participants and institutions involved. Informed consent for participation was obtained from individual members of the multidisciplinary team. Clearance was obtained from the ethics committee of the University of Pretoria, and institutional consent was obtained from the necessary organisations. This intervention study targeted the multidisciplinary team where medical, nursing, allied health profession and non-medical support personnel were involved in implementing DC. Phase One’s targets and goals included improving the quality of care rendered at the research setting, reducing developmental delays for preterm and sick infants and improved the working environment for the multidisciplinary team. Personnel targets were increasing the staffs’ knowledge and skills, and improving staff morale and job satisfaction. These targets and goals were achieved. / Thesis (PhD (Nursing Science))--University of Pretoria, 2006. / Nursing Science / unrestricted

No description available.

Invasive species are generally regarded as detrimental to native communities because they cause increased competition and community structure alterations. There is therefore a critical need to understand the ecological processes underlying the establishment and spread of invasive species. While most studies to date have focused on the role of competition in species invasions, trophic dynamics may also play a fundamental role in the establishment and spread of non-natives, especially in cases when a non-native species experiences differential predation pressure relative to a native competitor. Herein I explore the potential for differential granivory pressure by a native rodent (Heermann’s kangaroo rat, Dipodomys heermanni arenae) on native shrubs and an invasive plant (Veldt grass, Ehrharta calycina). Veldt grass, a perennial tufted grass native to South Africa and introduced to California in 1929, is highly invasive, and the shift of native coastal dune scrub to a grassland, dominated by Veldt grass, is considered one of the factors that led to the decline of the federally endangered Morro Bay kangaroo rat. However, kangaroo rats are largely graminivores (consume grass seed) and are known to consume invasive grasses and other plants. Differential seed preferences for native and Veldt seed were examined by placing feeding stations containing each seed type in habitats dominated by either native plants or Veldt grass. Each feeding station was monitored using motion-activated game cameras and the amount of each seed type collected by nineteen individually-marked, wild kangaroo rats was documented. These marked kangaroo rats were monitored both in native and Veldt grass habitats, allowing for the testing of habitat origin (Native vs. Veldt), sex (male or female) and seed type on the amount of seed taken. Nine of the kangaroo rats harvested Veldt grass seed. Though females collected more seed than males, there was no difference between the amounts (% of available seed) of Veldt grass and native seed collected. Habitat of origin (i.e., habitats with Veldt grass present or habitats without Veldt grass) had no effect on the amount of seed collected or the type of seed collected. During seed station trials, kangaroo rats were also recorded removing seed heads from naturally occurring Veldt grass stalks, providing clear documentation that Heermann’s kangaroo rats do collect Veldt grass seed. Accompanying laboratory seed preference trials were also conducted to confirm the consumption of Veldt grass seed. These controlled laboratory trials revealed that Heermann’s kangaroo rats will consume Veldt grass seed, although Veldt grass seed was consumed in smaller amounts (g) than millet and sunflower seed, which were presented simultaneously. These findings indicate that non-native Veldt grass may provide an additional or alternative source of seed for kangaroo rats, which could provide a partial explanation for why kangaroo rats are able to survive in monocultures of Veldt grass.

BACKGROUND: The prevalence of neonatal abstinence syndrome (NAS) is on the rise in the United States, as the epidemic of opioid misuse continues1. Several infants with in utero exposure to opioids are born with NAS, and exhibit symptoms of withdrawal and dependence upon birth when the maternal source of opioid is discontinued2. Due to the novelty of the syndrome, there are several knowledge gaps in current literature that remain to be explored. LITERATURE REVIEW: The exact mechanism of development of NAS in infants remains unknown, yet the clinical symptomatology and results of a few recent studies suggest that there is an association with NAS severity and dysregulation of autonomic nervous system (ANS) functioning in these infants3. In recent years, pharmacological treatments for these infants have become standardized4. However, non-pharmacological treatments have been adopted from treatment guidelines of other high-risk infant populations and their efficacy warrants further evaluation in infants with NAS. Kangaroo care (KC) is a supportive therapy commonly applied to many high-risk infant populations because of its physiologically stabilizing effects5. The therapy has been demonstrated to be especially beneficial in the treatment of preterm infants, a population that similarly requires additional maturation of their ANS upon birth,6. Neurobehavioral theories suggest ANS functioning in infancy is a strong predictor of long-term social, behavioral, and cognitive development outcomes7,8. PROPOSED PROJECT: This prospective cohort study is designed to provide pilot data to establish if KC can be utilized to mature ANS maturation in infants with NAS. CONCLUSIONS AND SIGNIFICANCE: KC is an inexpensive, readily available, low risk intervention that could improve neurobehavioral outcomes in infants with NAS. The results of this study could reduce clinical symptoms, potentiate long-term behavior outcomes, and better define treatment practices for infants with NAS by facilitating a targeted intervention to improve outcomes.

Human activities and unpredictable changes to environmental habitats impose a suite of stress and challenges to animal homeostatic function. Stress responses are often controlled by the release of glucocorticoids to mobilize energy, primarily corticosterone in small mammals, to help regulate homeostatic function such as heterothermy and changes to body condition, the latter of which serves as a proxy for energy reserves. Adaptive heterothermy is influenced by daily and seasonal patterns, heat produced from daily activity, and has been shown to increase in small mammals during times of environmental stress to conserve energy budgets. Body condition also changes in response to environmental perturbations, mobilization of energy by corticosterone, seasonal changes, and activity. My study aimed to disentangle the effects of environment and activity on homeostatic responses by pharmacologically manipulating corticosterone in kangaroo rats. Kangaroo rats are ecosystem engineers, heterothermic, and their activity periods are functions of their thermoregulatory patterns as well as environmental conditions thus making the species a great candidate for this form of study. I conducted two in-situ field experiments to assess for the effects of stress responses on thermoregulation, activity, and body condition. In my first experiment, I used body temperature (Tb) as a proxy for activity time and examined how pharmacologically increased corticosterone influenced kangaroo rat heterothermy responses to the moon phases and ambient temperatures. I also examined their fat, lean mass, and water content at the end of the study. Moon phase was a significant predictor of activity period as animals typically waited longer during the waxing moon phase to become active and cooled down below activity earlier in the night during the waning moon phase. As nights shortened, activity decreased despite environmental conditions becoming warmer. Corticosterone also significantly decreased total activity time and thus steadily increased heterothermy across the length of my experiment. These results indicate activity, not environment, are stronger drivers of heterothermy patterns. Total fat content (energy content) at the end of the study was not affected by corticosterone. The lack of change in fat content was presumably because kangaroo rat body condition was measured once at the end of the study and likely not a reflection of changed body condition over time. In my second experiment, I examined body condition across a longer period by measuring lean mass, fat content, and total body water across a 2-month period in the summer by pharmacologically increasing corticosterone to test the relationship between stress and body condition and to dissociate the two from environmental factors. Body condition indices generally increased across the summer, but corticosterone implantation did not significantly affect body any of the indices. The loss of heterothermic control and decrease in activity time across the summer suggests that animals are likely conserving energy budgets leading to preservation of condition. Further, banner-tailed kangaroo rats generally breed in the spring where body condition falls due to stress induced by increased competition and then increases across the summer as late summer monsoons promote the growth of primary resources utilized by animals thereby preserving body condition. This study suggests that body condition is driven more by life-history traits, activity time, and environment rather than stress responses.

The purpose of this study was to compare the morphology of the hind limb of the pocket gopher with that of the kangaroo rat and to determine their differences. This was accomplished by first, obtaining the specimens; second, preparation of the specimens for preservation and dissection; third, photographing and tracing the muscles; fourth, noting the origin and insertion of each muscle and their general morphology; and fifth, preparation and photographing of the bones. Comparative volumetric measurements were made of the muscles of the two animals to determine the differences between them. These two families, Geomyidae and Heteromyidae, are closely related but show great morphological differences which are adaptive due to their different environments and habits. The volumetric measurements of the two animals showed the shank of the kangaroo rat to be twice the size of that of the pocket gopher. The muscles used by the kangaroo rat in jumping are longer and larger as indicated by the volumetric displacement and linear measurements. Also, linear measurements were made of the various muscles and bones, These measurements also showed the variation in lenth and width, with those muscles of the kangaroo rat baing longer and wider. In the study of the bones, the general outlines of the two forms were vastly different. The location of tuberosities, size of the tuberosities for muscle attachment, bone length and width made up these differences. Origins, insertion, actions and description of the muscles are given for each animal.

Activity curves for Dipodomys ordii were developed from data obtained from a study utilizing an electrically monitored trapping grid. The curves for non-perturbated populations showed an initial post-dusk peak, followed by increasing activity and a large pre-dawn peak; but after ten dominant animals had been removed, the largest activity peak was post-dusk. Differences in activity patterns were not found among sex, age or reproductive classes. Rising ambient temperatures, falling barometric pressures, winds over 3.2 km/hr and the absence of the moon depressed capture numbers; while increasing humidity (relative and absolute), decreasing soil temperatures at 20 and 40 cm below ground level, rising barometric pressures, winds under 3.2 km/hr and clear periods with moonlight increased capture numbers; but only cloudy periods significantly altered the shape of the curves. Low statistical correlation indicated that other independent environmental variables, in addition to those considered, determined the observed activity patterns. Visual observations did not differ significantly from trap results.

The purpose of this thesis is to provide a critical analysis of research findings about nonpharmacological techniques used independently of pharmacological techniques to prevent or reduce procedural pain for infants in the neonatal intensive care unit (NICU). A synthesis of the current research related to nonpharmacological pain relief techniques for infants was conducted for this thesis. Nonpharmacological interventions reviewed in this study include: Kangaroo Care, swaddling, facilitated tucking, positioning, music, non-nutritive sucking and sucrose. An interdisciplinary review of the research was performed using the interdisciplinary databases Cumulative Index of Nursing and Allied Health, PubMED, and PsychINFO. Inclusion criteria for this thesis consists of research focused on preterm neonates (born less than] 37 weeks gestational age) in the neonatal intensive care unit, the use of nonpharmacological interventions for procedural analgesia, peer reviewed articles, and those written in the English language. This study excludes full term neonates due to the significant number of preterm neonates in the NICU. A total of 18 studies were included in this review. All interventions except for positioning show statistically significant evidence to support their use to reduce procedural pain in preterm neonates. Findings of this thesis may promote further studies and exploration into this field. In addition, this thesis establishes the role of the nurse in providing pain relief for infants in the NICU, as well as provide for enhancement of interdisciplinary care amongst other health care providers.