1,720,956 research outputs found
Evaluation of the prevalence of retinopathy of prematurity at Parirenyatwa group of hospitals and Harare central hospital
No full textBackground: Retinopathy of prematurity is notably one of the causes of avoidable
blindness. The risk factors for the development of ROP are very low birth weight(<1500g), low gestational age (GA) (<32 weeks) and duration of oxygen
supplementation. The prevalence varies world over, with high income countries having higher figures than their low income counterparts. Zimbabwe is a low income economy, however Harare is urbanised and a significant number of preterm infants at risk of developing ROP do survive.
Objectives:
1. To establish the prevalence of ROP at PGH NICU and HCH NNU at 4-6 weeks chronological age.
2. To assess the prevalence of ROP requiring treatment and ROP not requiring treatment a 4-6 weeks chronological age.
3. To establish the risk factors associated with ROP as well as the ocular features of ROP in our neonatal units.
4. To assess the current oxygen delivery protocols for VLBW preterm babies in our neonatal units.
Study Design: Hospital based cross sectional analytical study.
Methodology: All neonates admitted in the neonatal units were screened weekly to
identify patients that met the study inclusion criteria. These infants were enrolled
into the study and examined at either the 4th, 5th or 6th week after birth. Ocular
examination findings were noted as well as the risk factors for ROP that each neonate may have been exposed to. Details of supplementary oxygen for each neonate were documented, that is duration of oxygen delivery, mode and flow rate.
A self-administered questionnaire was completed by medical personnel working in the units, to assess their current knowledge concerning oxygen delivery in VLBW preterm infants.
Results: A total of 141 premature babies were enrolled into the study. Twenty infants died and 121 were examined. Six infants were diagnosed with ROP, therefore the prevalence of ROP at 4-6 weeks chronological age was 5.0%. All the infants diagnosed with ROP
had spontaneous resolution making the prevalence of children with ROP requiring treatment 0.0%. Three out of 6 (50.0%) had stage 1 disease and 3(50.0%) had stage 2 disease. Location of the disease was as follows; Five out of 6 (83.3%) neonates had
disease in zone 3 and 1 (16.7%) had disease in zone 2.
The risk factors associated with ROP in this study were, prolonged duration of oxygen
supplementation >2 weeks, very low birth weight <1100g and EGA<30 weeks.
Seventy per cent of the medical personnel stated that they were aware of an oxygen
delivery protocol. However the SaO2 levels that they aim to maintain vary, with most
personnel aiming to maintain in the 90-95% and 95-100% ranges.
Conclusions: There are VLBW preterm infants who survive and develop ROP in our
neonatal units. It follows that the screening of all neonates at risk is essential.
Current oxygen delivery protocols must be revisited & revised by medical personnel.
Monitoring SaO2 in VLBW preterm neonates would improve with more equipment for monitoring SaO2 as well as more nursing staff
Evaluation of the prevalence of retinopathy of prematurity at Parirenyatwa group of hospitals and Harare central hospital
No full textBackground: Retinopathy of prematurity is notably one of the causes of avoidable
blindness. The risk factors for the development of ROP are very low birth weight(<1500g), low gestational age (GA) (<32 weeks) and duration of oxygen
supplementation. The prevalence varies world over, with high income countries having higher figures than their low income counterparts. Zimbabwe is a low income economy, however Harare is urbanised and a significant number of preterm infants at risk of developing ROP do survive.
Objectives:
1. To establish the prevalence of ROP at PGH NICU and HCH NNU at 4-6 weeks chronological age.
2. To assess the prevalence of ROP requiring treatment and ROP not requiring treatment a 4-6 weeks chronological age.
3. To establish the risk factors associated with ROP as well as the ocular features of ROP in our neonatal units.
4. To assess the current oxygen delivery protocols for VLBW preterm babies in our neonatal units.
Study Design: Hospital based cross sectional analytical study.
Methodology: All neonates admitted in the neonatal units were screened weekly to
identify patients that met the study inclusion criteria. These infants were enrolled
into the study and examined at either the 4th, 5th or 6th week after birth. Ocular
examination findings were noted as well as the risk factors for ROP that each neonate may have been exposed to. Details of supplementary oxygen for each neonate were documented, that is duration of oxygen delivery, mode and flow rate.
A self-administered questionnaire was completed by medical personnel working in the units, to assess their current knowledge concerning oxygen delivery in VLBW preterm infants.
Results: A total of 141 premature babies were enrolled into the study. Twenty infants died and 121 were examined. Six infants were diagnosed with ROP, therefore the prevalence of ROP at 4-6 weeks chronological age was 5.0%. All the infants diagnosed with ROP
had spontaneous resolution making the prevalence of children with ROP requiring treatment 0.0%. Three out of 6 (50.0%) had stage 1 disease and 3(50.0%) had stage 2 disease. Location of the disease was as follows; Five out of 6 (83.3%) neonates had
disease in zone 3 and 1 (16.7%) had disease in zone 2.
The risk factors associated with ROP in this study were, prolonged duration of oxygen
supplementation >2 weeks, very low birth weight <1100g and EGA<30 weeks.
Seventy per cent of the medical personnel stated that they were aware of an oxygen
delivery protocol. However the SaO2 levels that they aim to maintain vary, with most
personnel aiming to maintain in the 90-95% and 95-100% ranges.
Conclusions: There are VLBW preterm infants who survive and develop ROP in our
neonatal units. It follows that the screening of all neonates at risk is essential.
Current oxygen delivery protocols must be revisited & revised by medical personnel.
Monitoring SaO2 in VLBW preterm neonates would improve with more equipment for monitoring SaO2 as well as more nursing staff
Evaluation of the prevalence of retinopathy of prematurity at Parirenyatwa group of hospitals and Harare central hospital
No full textBackground: Retinopathy of prematurity is notably one of the causes of avoidable
blindness. The risk factors for the development of ROP are very low birth weight(<1500g), low gestational age (GA) (<32 weeks) and duration of oxygen
supplementation. The prevalence varies world over, with high income countries having higher figures than their low income counterparts. Zimbabwe is a low income economy, however Harare is urbanised and a significant number of preterm infants at risk of developing ROP do survive.
Objectives:
1. To establish the prevalence of ROP at PGH NICU and HCH NNU at 4-6 weeks chronological age.
2. To assess the prevalence of ROP requiring treatment and ROP not requiring treatment a 4-6 weeks chronological age.
3. To establish the risk factors associated with ROP as well as the ocular features of ROP in our neonatal units.
4. To assess the current oxygen delivery protocols for VLBW preterm babies in our neonatal units.
Study Design: Hospital based cross sectional analytical study.
Methodology: All neonates admitted in the neonatal units were screened weekly to
identify patients that met the study inclusion criteria. These infants were enrolled
into the study and examined at either the 4th, 5th or 6th week after birth. Ocular
examination findings were noted as well as the risk factors for ROP that each neonate may have been exposed to. Details of supplementary oxygen for each neonate were documented, that is duration of oxygen delivery, mode and flow rate.
A self-administered questionnaire was completed by medical personnel working in the units, to assess their current knowledge concerning oxygen delivery in VLBW preterm infants.
Results: A total of 141 premature babies were enrolled into the study. Twenty infants died and 121 were examined. Six infants were diagnosed with ROP, therefore the prevalence of ROP at 4-6 weeks chronological age was 5.0%. All the infants diagnosed with ROP
had spontaneous resolution making the prevalence of children with ROP requiring treatment 0.0%. Three out of 6 (50.0%) had stage 1 disease and 3(50.0%) had stage 2 disease. Location of the disease was as follows; Five out of 6 (83.3%) neonates had
disease in zone 3 and 1 (16.7%) had disease in zone 2.
The risk factors associated with ROP in this study were, prolonged duration of oxygen
supplementation >2 weeks, very low birth weight <1100g and EGA<30 weeks.
Seventy per cent of the medical personnel stated that they were aware of an oxygen
delivery protocol. However the SaO2 levels that they aim to maintain vary, with most
personnel aiming to maintain in the 90-95% and 95-100% ranges.
Conclusions: There are VLBW preterm infants who survive and develop ROP in our
neonatal units. It follows that the screening of all neonates at risk is essential.
Current oxygen delivery protocols must be revisited & revised by medical personnel.
Monitoring SaO2 in VLBW preterm neonates would improve with more equipment for monitoring SaO2 as well as more nursing staff
Evaluation of the Prevalence of Retinopathy of Prematurity at Parirenyatwa Group of Hospitals and Harare Central Hospital
No full textBackground: Retinopathy of prematurity is notably one of the causes of avoidable blindness. The risk factors for the development of ROP are very low birth weight (<1500g), low gestational age (GA) (<32 weeks) and duration of oxygen supplementation. The prevalence varies world over, with high income countries having higher figures than their low income counterparts. Zimbabwe is a low income economy, however Harare is urbanised and a significant number of preterm infants at risk of developing ROP do survive.
Objectives:
1. To establish the prevalence of ROP at PGH NICU and HCH NNU at 4-6 weeks chronological age.
2. To assess the prevalence of ROP requiring treatment and ROP not requiring treatment a 4-6 weeks chronological age.
3. To establish the risk factors associated with ROP as well as the ocular features of ROP in our neonatal units.
4. To assess the current oxygen delivery protocols for VLBW preterm babies in our neonatal units.
Study Design: Hospital based cross sectional analytical study.
Methodology: All neonates admitted in the neonatal units were screened weekly to identify patients that met the study inclusion criteria. These infants were enrolled into the study and examined at either the 4th, 5th or 6th week after birth. Ocular examination findings were noted as well as the risk factors for ROP that each neonate may have been exposed to. Details of supplementary oxygen for each neonate were documented, that is duration of oxygen delivery, mode and flow rate.
A self-administered questionnaire was completed by medical personnel working in the units, to assess their current knowledge concerning oxygen delivery in VLBW preterm infants.
Results: A total of 141 premature babies were enrolled into the study. Twenty infants died and 121 were examined. Six infants were diagnosed with ROP, therefore the prevalence of ROP at 4-6 weeks chronological age was 5.0%. All the infants diagnosed with ROP had spontaneous resolution making the prevalence of children with ROP requiring treatment 0.0%. Three out of 6 (50.0%) had stage 1 disease and 3(50.0%) had stage 2 disease. Location of the disease was as follows; Five out of 6 (83.3%) neonates had disease in zone 3 and 1 (16.7%) had disease in zone 2.
The risk factors associated with ROP in this study were, prolonged duration of oxygen supplementation >2 weeks, very low birth weight <1100g and EGA<30 weeks.Seventy per cent of the medical personnel stated that they were aware of an oxygen delivery protocol. However the SaO2 levels that they aim to maintain vary, with most personnel aiming to maintain in the 90-95% and 95-100% ranges.
Conclusions: There are VLBW preterm infants who survive and develop ROP in our neonatal units. It follows that the screening of all neonates at risk is essential. Current oxygen delivery protocols must be revisited & revised by medical personnel. Monitoring SaO2 in VLBW preterm neonates would improve with more equipment for monitoring SaO2 as well as more nursing staff
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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