Ce mémoire de thèse porte sur le traitement et l'analyse des signaux issus des unités de soins intensifs néonatales (USIN) pour l'étude de la maturité, de l'infection généralisée et de l'influence de l'immunisation chez le nouveau-né prématuré. Une attention particulière est portée sur l'électroencéphalographie et le signal de respiration. Pour le premier, ce signal est souvent bruité en USIN et des méthodes de décomposition du signal et d'annulation optimale du bruit, adaptées aux particularités des EEG immatures, ont été proposées et évaluées objectivement sur signaux réels et simulés. L'analyse de l'EEG et des bouffées delta, repérées automatiquement par un classificateur proposé, ont permis d'étudier la maturation et les effets de la vaccination. Pour la seconde modalité, la respiration, des méthodes non-linéaires et fractales sont retenues et adaptées pour évaluer la maturité et l'infection généralisée. Une étude de robustesse des méthodes d'estimation est menée et on montre que l'exposant de Hurst, estimé sur des signaux de variabilité respiratoire, est un bon détecteur de l'infection. / This Ph.D. dissertation processes and analyzes signals from the neonatal intensive care units (NICUs) for the study of maturity, systemic infection (sepsis) and the influence of immunization in the premature newborn. A special attention is payed to the electroencephalography and the breathing signal. The former is often contaminated by several sources of noise, thus methods based on the signals decomposition and optimal noise cancellation, adapted to the characteristics of the immature EEG, were proposed and evaluated objectively on real and simulated signals. By means of the EEG and delta burst analysis, detected automatically by a proposed classifier, infant's maturation and the effects of vaccination are studied. Concerning the second signal, breathing, non-linear and fractal methods are adapted to evaluate maturity and sepsis. A robustness study of estimation methods is also conducted, showing that the Hurst exponent, estimated on respiratory variability signals, is a good detector of infection.

Introduction: Epidemiological studies have indicated that 5-38% of influenza like illnesses (ILI) develop into severe disease due to, among others, factors such as; underlying chronic diseases, age, pregnancy, and viral mutations. There are suggestions that dual or multiple virus infections may affect disease severity. This study investigated the association between co-infection between influenza A viruses and other respiratory viruses and disease severity. Methodology: Datum for samples from North West England tested between January 2007 and June 2012 was analysed for patterns of co-infection between influenza A viruses and ten respiratory viruses. Risk of hospitalization to a general ward ICU or death in single versus mixed infections was assessed using multiple logistic regression models. Results: One or more viruses were identified in 37.8% (11,715/30,975) of samples, of which 10.4% (1,214) were mixed infections and 89.6% (10,501) were single infections. Among patients with influenza A(H1N1)pdm09, co-infections occurred in 4.7% (137⁄2,879) vs. 6.5% (59⁄902) in those with seasonal influenza A virus infection. In general, patients with mixed respiratory virus infections had a higher risk of admission to a general ward (OR: 1.43, 95% CI: 1.2 – 1.7, p = <0.0001) than those with a single infection. Co-infection between seasonal influenza A viruses and influenza B virus was associated with a significant increase in the risk of admission to ICU/ death (OR: 22.0, 95% CI: 2.21 – 219.8 p = 0.008). RSV/seasonal influenza A viruses co-infection also associated with increased risk but this was not statistically significant. For the pandemic influenza A(H1N1)pdm09 virus, RSV and AdV co-infection increased risk of hospitalization to a general ward, whereas Flu B increased risk of admission to ICU/ death, but none of these were statistically significant. Considering only single infections, RSV and hPIV1-3 increased risk of admission to a general ward (OR: 1.49, 95% CI: 1.28 – 1.73, p = <0.0001 and OR: 1.34, 95% CI: 1.003 – 1.8, p = 0.05) and admission to ICU/ death (OR: 1.5, 95% CI: 1.20 – 2.0, p = <0.0001 and OR: 1.60, 95% CI: 1.02 – 2.40, p = 0.04). Conclusion: Co-infection is a significant predictor of disease outcome; there is insufficient public health data on this subject as not all samples sent for investigation of respiratory virus infection are tested for all respiratory viruses. Integration of testing for respiratory viruses’ co-infections into routine clinical practice and R&D on integrated drugs and vaccines for influenza A&B, RSV, and AdV, and development of multi-target diagnostic tests is encouraged.

Comprehensive management in the neonatal nursery involves medical treatment of the infant, as well as developmental care and the provision of guidance, counselling and information to the family who are part of the decision-making process regarding the infant’s care. Neonatal communication intervention is of utmost importance in a country such as South Africa, which has an increased prevalence of infants at risk for disabilities and where the majority of these infants live in poverty. Speech-language therapists fulfil an important role in the neonatal nursery and are an integral part of the team involved with the high risk neonatal population. Local literature showed a dearth of information on the current service delivery and roles of speech-language therapists and audiologists in neonatal nurseries in the South African context. From an asset-based perspective it appears that the South African population receiving services in neonatal nurseries have unique characteristics. This provides speech-language therapists with ample opportunity to intervene, providing that intervention is well-timed in the neonatal nursery context. The country-wide initiative to implement the evidence-based technique of kangaroo mother care indicates that speech-language therapists should recognise its importance and develop communication based materials and tools to complement this successful neonatal intervention. The aim of the research was to establish whether speech-language therapists have needs for assessment and intervention tools/materials in this context. The study furthermore aimed to compile a locally relevant neonatal communication intervention instrument/tool for use by speech-language therapists in the neonatal nurseries of public hospitals in South Africa in order to propose a solution to address the shortage of tools in the public health context. The study entailed descriptive, exploratory research. During Phase 1, a survey was received back from 39 speech-language therapists and two audiologists in six provinces. The data revealed that participants performed different roles in neonatal nurseries, which were determined by the environment, tools, materials and instrumentation available to them. Many participants were inexperienced, but were resourceful in their attempts to develop and adapt tools/materials. Participants expressed a need for culturally appropriate and user-friendly instruments for parent guidance and staff/team training on the topic of developmental care. During Phase 2 a tool for parent guidance titled “Neonatal communication intervention programme for parents” was compiled for use by speech-language therapists and justified by participants’ roles and needs as well as current early communication intervention (ECI) literature. The programme was piloted by three participants. Certain suggestions for enhancements of the programme were made such as providing a glossary of terms, adapting the programme’s language and terminology, and providing more illustrations. The programme complied with the guiding principles for best practice in ECI (ASHA, 2008) and can therefore contribute to neonatal care of high risk infants in South Africa. Speech-language therapists and audiologists must contribute to neonatal care of high risk infants to facilitate optimal health and development and to support their families. AFRIKAANS : Omvattende intervensie in die neonatale sorgeenheid behels mediese behandeling van die neonaat, sowel as ontwikkelingstoepaslike sorg en die verskaffing van leiding, berading en inligting aan die gesin wat deel is van die besluitnemingsproses rakende die baba se sorg. Neonatale kommunikasie intervensie is van uiterste belang in Suid-Afrika aangesien daar ‘n hoër prevalensie van babas is wat ‘n risiko het vir ontwikkelingsafwykings en aangesien die meerderheid van hierdie babas in armoede leef. Spraak-taalterapeute vervul ‘n belangrike rol in die neonatale sorgeenheid en is ‘n integrale deel van die span wat betrokke is by die hoërisiko neonatale populasie. Plaaslike literatuur dui op ‘n tekort aan inligting rakende die huidige dienslewering van die spraak-taalterapeut en oudioloog in neonatale sorgeenhede in die Suid-Afrikaanse konteks. Vanuit ‘n bate-benadering kom dit voor of die Suid-Afrikaanse populasie wat dienste in neonatale sorgeenhede ontvang, unieke eienskappe het. Dit bied genoegsame geleenthede aan spraak-taalterapeute om intervensie te verskaf, solank die behandeling betyds in die neonatale sorgeenheid konteks aanvang neem. Daar is ‘n landswye inisiatief om die bewysgerigte tegniek van kangeroe moedersorg toe te pas. Spraak-taalterapeute moet dus die belang daarvan herken en kommunikasie gebasseerde terapiemateriaal ontwikkel om hierdie suksesvolle neonatale intervensie te komplementeer. Die navorsing se doel was om vas te stel hoe wyd spraak-taalterapeute en oudioloe ‘n behoefte aan evaluasie en intervensie instrumente en –materiaal in hierdie konteks het. Die navorsing het verder ten doel gestel om ‘n relevante terapie instrument saam te stel vir spraak-taalterapeute in die neonatale sorgeenhede as ‘n moontlike oplossing vir die tekort aan relevante terapiemateriaal in die plaaslike publieke gesondheidsorgkonteks. Die studie het beskrywende, eksplorerende navorsing behels. Gedurende Fase 1 is ‘n vraelys terug ontvang van 39 spraak-taalterapeute en twee oudioloë in ses provinsies. Die data het aangedui dat deelnemers verskillende rolle in hierdie konteks vervul, wat beïnvloed was deur die omgewing, die instrumentasie en materiaal wat tot hulle beskikking was. Die meerderheid van die deelnemers was onervare, maar was vindingryk in hulle pogings om terapiemateriaal aan te pas en te ontwikkel. Deelnemers het ‘n behoefte vir kultureel toepaslike- en gebruikersvriendelike instrumente en materiaal uitgedruk met die oog op ouerleiding en personeel/span opleiding oor die onderwerp van ontwikkelingstoepaslike sorg. Gedurende Fase 2 is ‘n terapie instrument naamlik “Neonatale kommunikasie intervensie program vir ouers” saamgestel vir die gebruik in die neonatale sorgeenhede deur spraak-taalterapeute. Die samestelling van hierdie program is verantwoord deur die deelnemers se rolbeskrywing en behoeftebepaling van Fase 1, sowel as deur huidige vroeë kommunikasie intervensie (VKI) literatuur. Die program is deur drie deelnemers in ‘n loodsstudie geëvalueer. Voorstelle vir die verbetering van die program is verskaf, naamlik die byvoeging van ‘n terminologielys, aanpassing van die program se taalgebruik en terminologie en verskaffing van meer illustrasies. Die program het ooreengestem met die beginsels vir beste praktyk in VKI (ASHA, 2008) en kan daarom tot neonatale sorg van hoërisikobabas in Suid-Afrika bydra. Spraak-taalterapeute en oudioloë moet bydra tot neonatale sorg van hoërisiko neonate om sodoende optimale gesondheidsorg en ontwikkeling te fasiliteer en gesinne te ondersteun. Copyright / Dissertation (MCommunication Pathology)--University of Pretoria, 2010. / Speech-Language Pathology and Audiology / unrestricted

No description available.

L’obstruction de la chambre de chasse du ventricule droit (OCCVD) chez les adultes subissant une chirurgie cardiaque est un diagnostic rarement décrit dans la littérature. Dans le cadre de cette maîtrise, plusieurs études ont été réalisées afin de répondre aux questions suivantes qui sont importantes cliniquement : Quelle est la prévalence de l’OCCVD en chirurgie cardiaque adulte? Et quelle est sa prévalence dans une population adulte de chirurgie cardiaque sous surveillance hémodynamique constante avec un cathéter pulmonaire capable de mesure le gradient de pression de la chambre de chasse du ventricule droit? D’abord, une revue de littérature sur l’OCCVD a été réalisée en faisant une recherche systématique avec des mots-clés dans la base de données MEDLINE dans PubMed. À partir de toutes les études décrivant l’OCCVD en chirurgie cardiaque adulte, une prévalence de 4 % a été calculée. L’étiologie la plus courante de ce phénomène était mécanique et associée à une compression extrinsèque. Par la suite, une étude rétrospective sur une base de données du centre hospitalier affilié au programme a démontré une corrélation positive entre la survenue d’une OCCVD et une détérioration clinique postopératoire. Un total de 295 patients de 67.2 ± 9.26 ans (79% male) avec des mesures d’OCCVD pré et post-circulation extracorporelle (CEC) ont été analysés. Une OCCVD avec un gradient ≥ 6 mmHg a été observée avant la CEC chez 89 patients [30,2 % (25,1 % - 35,6 %)] et après la CEC chez 129 patients [43,7 % (38,2 % - 49,4 %)]. Nous avons déterminé que l’OCCVD est une complication rare mais importante à étudier et à suspecter puisqu’elle peut être ciblée par des traitements selon son étiologie. / Right ventricular outflow tract obstruction (RVOTO) is a diagnosis rarely described in adult patients undergoing cardiac surgery. In order to write this Master’s thesis, studies were conducted to determine the prevalence of RVOTO in adult cardiac surgery patients, as well as the prevalence in a similar population with continuous monitoring of pressure gradient data across the right ventricular outflow tract using a pulmonary artery catheter. First, we reviewed the literature on RVOTO by performing a systematic keyword search in the MEDLINE database via PubMed. A prevalence of 4% was calculated by extrapolating the results of all the studies describing RVOTO in adult cardiac surgery. The most common etiology for this phenomenon was mechanical and subsequent to an extrinsic compression. Second, a retrospective study on a database from the university-affiliated hospital center showed a positive correlation between the development of RVOTO and a postoperative clinical decline. A total of 295 patients aged 67.2 ± 9.26 years old (79% male) with RVOTO data from before and after cardiopulmonary bypass (CPB) were analysed. A RVOTO with a gradient ≥ 6 mmHg was observed before CPB in 89 patients [30.2% (25.1% - 35.6%)] et after CPB in 129 patients [43.7 % (38.2 % - 49.4 %)]. We determined that RVOTO is a rare but important complication because it can be targeted with therapies according to its etiology.

Les nouveau-nés prématurés sont soumis à de nombreuses procédures douloureuses lors de leur hospitalisation à l’unité néonatale, où la plus fréquente est le prélèvement sanguin au talon. La douleur répétée et non traitée entraîne des conséquences à long terme pour les nouveau-nés prématurés. L’utilisation des interventions de soulagement de la douleur, tant pharmacologiques que non pharmacologiques, est limitée chez cette population. Nous avons donc vérifié la faisabilité et l’effet d’une nouvelle intervention pour le soulagement de la douleur, soit l’odeur du lait maternel. Cette étude pilote visait à évaluer la faisabilité et l’acceptabilité d’une intervention de stimulation olfactive avec du lait maternel pour diminuer la réponse à la douleur des nouveau-nés prématurés, nés entre 28 et 34 semaines de gestation, lors d’un prélèvement sanguin au talon. L’étude pilote a été menée auprès d’un groupe de 12 nouveau-nés prématurés (présence de jumeaux), 11 mères et 20 infirmières dans une unité néonatale de niveau III, soit de soins intensifs. L’odeur du lait maternel a été combinée aux soins standards au moment du prélèvement sanguin au talon et la douleur a été mesurée à l’aide du Premature Infant Pain Profile Revised. Ensuite, les mères et les infirmières ont complété des questionnaires concernant la faisabilité et l’acceptabilité de l’intervention de stimulation olfactive. Des questionnaires auto-administrés remis aux mères (n=11) et aux infirmières (n=20) après l’intervention ont permis de confirmer la faisabilité et l’acceptabilité de l’intervention qui étaient de plus de 80% pour les mères et les infirmières. Les effets observés ont indiqué que plus la compresse imbibée de lait maternel était proche du nez du nouveau-né prématuré plus il semblait y avoir un effet sur la diminution de la réponse à la douleur lors d’un prélèvement sanguin au talon ainsi qu’un retour au calme après le prélèvement plus rapide. L’odeur du lait maternel est une intervention non pharmacologique de soulagement de la douleur qui est peu coûteuse et facilement réalisable par les mères et les infirmières. Les résultats de l’étude pilote confirment la faisabilité et l’acceptabilité de l’intervention et soutiennent la méthodologie d’un essai clinique randomisé à plus large échelle. / Preterm neonates experience many painful procedures during their hospitalisation in the Neonatal Intensive Care Unit (NICU) where heel prick is the most frequent painful intervention. Repeated and untreated pain has long term consequences for preterm neonates. The use of pharmacological and non-pharmacological pain management interventions is limited for preterm neonates. Therefore, it is essential to investigate new pain management interventions such as breast milk odor. This pilot study aimed to evaluate the feasibility and acceptability of an olfactive stimulation intervention to manage procedural pain of preterm neonates, born between 28 and 34 weeks of gestation, during heel prick. A pilot study was conducted with 12 preterm neonates, 11 mothers and 20 nurses in a level III NICU. The study group was familiarised with breast milk odor for nine hours preceding blood sampling. Breast milk odor was combined with standard care during heel prick and pain was measured by the Premature Infant Pain Profile-Revised. Self-reported questionnaires administered to mothers (n = 11) and nurses (n = 20) confirmed the feasibility and acceptability of the intervention, with a proportion of over 80% for both of these items. Observed effect indicated that the closer the compress with the breast milk odor was to the preterm neonates’ nose (n=12), the shorter time to return to baseline after the painful procedure was and the lower the pain score was on the PIPP-R. Breast milk odor is a non-pharmacological pain management intervention which is non-expensive and feasible for mothers and nurses. Findings of this pilot study guide the methodology of a randomized controlled trial.

BACKGROUND: Clinical facilities are essential components not only for health care delivery systems but also for health care education programs. The clinical learning environment is important in training the future workforce in healthcare. Respiratory therapy education programs face several issues with the need to prepare a proper learning environment in different clinical settings. PURPOSE: The purpose of this study was to determine the perceptions of respiratory therapy students on the learning environment of clinical facilities affiliated with a respiratory therapy program at an urban state university. METHODS: This study used an exploratory research design to evaluate the essential aspects of a clinical learning environment in respiratory therapy education. A self-reporting survey was utilized to gather data from 34 respiratory therapy students regarding their perception about the effectiveness of clinical facilities in respiratory therapy education. The researcher utilized The Clinical Learning Environment, Supervision and Nurse Teacher (CLES+T) evaluation scale that was developed by Sarrikoski et al. (2008). The CLES+T evaluation scale was adapted and modified after a written agreement from the author. The survey included three main domains, which are the clinical learning environment (18 items), the supervision relationship (15 items), and the role of clinical instructors (9 items). Thirty-two students participated in the survey with a response rate of 94.1%. RESULTS: Responses included two groups of students: the second year undergraduate (68.8%) and graduate students (31.3%), with 75% being female participants. The results obtained from the study indicated that both graduate and undergraduate respiratory therapy students gave high mean scores to the learning environment of the clinical facilities, supervisory relationship and the roles of clinical instructors. A statistically significant data was obtained pertaining to the difference of perceptions regarding the multi-dimensional learning between the graduate and undergraduate students. The graduate students evaluated that “the learning situation are multi-dimensional” more than the undergraduate students (p = 0.03). Findings of this study showed that female students had higher ratings than male students in all evaluations of clinical facilities. However, only one dimension of leadership style stating that “the effort of individual employees was appreciated” was statistically significant (p=0.03). The results stating, the presence of a significant percentage of the students with lack of successful private supervision and high percentage of failed supervisory relationship, are in contrast with the fact that clinical learning plays a vital role in the respiratory therapy education. It is also contrasting that majority of the students experienced team supervision, which is against the philosophy and principles of individualization. CONCLUSION: Since respiratory therapy is a practice-based profession, it is essential to integrate clinical education to respiratory care education. Gender and education level may impact students’ perceptions about the learning environment of clinical facilities. This study provides information about areas for improvement in clinical facilities affiliated with a respiratory care education program at an urban university.