11 results on '"Ryan CA"'
Search Results
2. Prediction of seizures in asphyxiated neonates: correlation with continuous video-electroencephalographic monitoring.
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Murray DM, Ryan CA, Boylan GB, Fitzgerald AP, and Connolly S
- Abstract
BACKGROUND: After perinatal asphyxia, predicting which infants will develop significant hypoxic-ischemic encephalopathy and neonatal seizures remains a difficult task. High-risk markers (Apgar score, acidosis, nucleated red blood cells, and resuscitation) have been used to predict neonatal seizures with varying success. The '3 strikes' of Apgar score of <5 at 5 minutes, pH <7.00, and need for intubation have been cited as having a positive predictive value of 80%. We examined whether the predictive values of these markers would be increased if early continuous electroencephalographic monitoring allowed us to accurately identify all neonatal seizures and to grade the encephalopathy. METHOD: We recruited term infants with perinatal asphyxia. Continuous video electroencephalography was commenced soon after birth and continued for 24 to 72 hours. The abilities of high-risk markers to predict electroencephalographic seizures, background electroencephalographic activity, and Sarnat grade were examined. RESULTS: Forty-nine infants were suitable for analysis. Electrographic seizures occurred in 11 of the 49 infants. Encephalopathy was scored by using Sarnat grade (6, severe; 18, moderate; 25, mild) and electroencephalographic findings (4 inactive, 4 major abnormalities, 16 moderate abnormalities, and 25 normal/mildly abnormal). Apgar score of <5 at 5 minutes, pH <7.0, and the need for intubation had positive predictive values for neonatal seizures of 18%, 16%, and 21%, respectively. Combining these markers gave a positive predictive value of 25% and a negative predictive value of 77%. Substituting base deficit or lactate for pH in the 3-strikes model did not improve its predictive value. Apgar score of <5 at 5 minutes, nucleated red blood cells, and a base deficit less than -15 mEq/L showed some association with Sarnat grade. Only 5-minute Apgar score was significantly associated with both Sarnat grade and electroencephalographic grade. CONCLUSION: After perinatal asphyxia, neither the condition at birth nor the degree of metabolic acidosis reliably predict neonatal seizures. [ABSTRACT FROM AUTHOR]
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- 2006
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3. Using tasks to measure consumers' ability to apply food guide recommendations: lessons learned.
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Ryan CA and Wilkins JL
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- 2001
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4. Quantitative or qualitative carbon dioxide monitoring for manual ventilation: a mannequin study.
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Hawkes, GA, Kenosi, M, Ryan, CA, and Dempsey, EM
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CAPNOGRAPHY , *CARBON dioxide , *POSITIVE pressure ventilation , *RESUSCITATION , *PEDIATRICS , *ADVERSE health care events - Abstract
Aim To compare the effectiveness of an in-line EtCO2 detector ( DET) and a quantitative EtCO2 detector ( CAP), both attached to a t-piece resuscitator, during PPV via a face mask. Methods Paediatric trainees were randomly assigned to determine the method of PPV they commenced with (No device ( ND), DET or CAP). Participants used each method for 2 min. Participants were video-recorded to determine the amount of effective ventilations delivered with each method. Results Twenty-three paediatric trainees provided a total of 6035 ventilations, and 91.2% were deemed effective. The percentages of median effective ventilations with the ND, the DET and the CAP were 91.0%, 93.0% and 94.0%, respectively. Fourteen (61%) of the trainees indicated a preference for the DET method, 8 (35%) for the CAP method, and 1 (4%) of the trainees indicated a preference for the ND method. Capnography was the most effective method per patient. Conclusion There was no adverse effect with the addition of EtCO2 detectors. Trainees favoured methods of EtCO2 monitoring during ventilation. The NeoStat device was the preferred device by the majority. The greatest efficacy was achieved with the capnography device. Capnography may enhance face mask ventilation. [ABSTRACT FROM AUTHOR]
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- 2015
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5. Current research suggests that the future looks brighter for cerebral oxygenation monitoring in preterm infants.
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Kenosi, M, Naulaers, G, Ryan, CA, and Dempsey, EM
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BRAIN injuries , *CEREBRAL circulation , *PHYSIOLOGICAL effects of oxygen , *PREMATURE infants , *NEAR infrared spectroscopy - Abstract
Brain injuries remain a significant problem for preterm infants, despite extensive physiological monitoring. Near infrared spectroscopy ( NIRS) monitoring in the neonatal intensive care unit has to date remained limited to research activities. Conclusion This review highlights the increasing clinical application of NIRS in delivery suites and neonatal units. Four randomised controlled trials incorporating NIRS monitoring suggest that the future may indeed be brighter for this technology in the care of very preterm infants. [ABSTRACT FROM AUTHOR]
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- 2015
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6. Emergency uncross-matched blood transfusions in a tertiary neonatal unit.
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Finn, D, Dorrian, A, Sheehy, J, Dempsey, EM, and Ryan, CA
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BLOOD transfusion , *INTRAPARTUM care , *NEONATAL intensive care , *BIRTH weight , *TERTIARY care ,PREMATURE infant death - Abstract
Aim: To determine the neonatal incidence, indications and outcomes following transfusions with emergency uncross-matched O-negative blood.Methods: A five-year retrospective review in a single tertiary neonatal unit was conducted. The blood transfusion laboratory's database was analysed for all infants who had received an emergency released blood transfusion (ERBT) between January 2010 and December 2014.Results: We calculated a total ERBT rate of 0.91 per 1000 live births (39/42 657) and a rate of 0.43 per 1000 in infants >34 weeks' gestation (18/41 637). A rate of 0.14 per 1000 births (6/42 657) received an ERBT as part of newborn stabilisation despite almost half of our infant cohort having intrapartum haemorrhages (n = 18, 46%). One-third (13/39) of all infants who were transfused died. Outcome varied depending on underlying aetiology, gestation and birthweight. The highest mortality was in preterm infants weighing <1000 g, of whom 70% died.Conclusion: This study establishes an ERBT rate of <1 per 1000 births, and 0.14 per 1000 infants received an ERBT as part of newborn delivery room stabilisation. ERBTs are associated with a high mortality rate. This study highlights the need for further research and guidelines that clarify the role of ERBTs in newborn stabilisations. [ABSTRACT FROM AUTHOR]- Published
- 2017
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7. Reporting on data monitoring committees in neonatal randomised controlled trials is inconsistent.
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Perrem, LM, Gosling, S, Ravikumar, I, Khashan, AS, Miletin, J, Ryan, CA, and Dempsey, E
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COMMITTEES , *TASK forces , *COMMITTEE reports , *RANDOMIZED controlled trials , *MEDICAL research , *CLINICAL trials , *BIBLIOMETRICS , *EXPERIMENTAL design , *NEWSLETTERS , *PATIENT safety , *STANDARDS - Abstract
Aim: To evaluate the reported use of data monitoring committees (DMCs), the frequency of interim analysis, prespecified stopping rules and early trial termination in neonatal randomised controlled trials (RCTs).Methods: We reviewed neonatal RCTs published in four high-impact general medical journals, specifically looking at safety issues including documented involvement of a DMC, stated interim analysis, stopping rules and early trial termination. We searched all journal issues over an 11-year period (2003-2013) and recorded predefined parameters on each item for RCTs meeting inclusion criteria.Results: Seventy neonatal trials were identified in four general medical journals: Lancet, New England Journal of Medicine (NEJM), British Medical Journal and Journal of American Medical Association. A total of 43 (61.4%) studies reported the presence of a DMC, 36 (51.4%) explicitly mentioned interim analysis, stopping rules were reported in 15 (21.4%) RCTs and seven (10%) trials were terminated early. The NEJM most frequently reported these parameters compared to the other three journals reviewed.Conclusion: While the majority of neonatal RCTs report on DMC involvement and interim analysis, there is still scope for improvement. Clear documentation of safety-related issues should be a central component of reporting in neonatal trials involving newborn infants. [ABSTRACT FROM AUTHOR]- Published
- 2017
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8. Auscultate, palpate and tap: time to re-evaluate.
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Hawkes, GA, Hawkes, CP, Kenosi, M, Demeulemeester, J, Livingstone, V, Ryan, CA, and Dempsey, EM
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AUSCULTATION , *PALPATION , *HEART rate monitoring , *NEWBORN infants , *MEDICAL simulation , *HOSPITAL medical staff , *HEART beat , *RESUSCITATION , *HEART auscultation - Abstract
Aim: To determine the accuracy of current methods of heart rate (HR) assessment.Methods: All participants palpated a simulated pulsating umbilicus (UMB), listened to a tapping rate (TAP) and auscultated a simulated HR (AUSC). A simulated HR of 54, 88 and 128 beats per minute (bpm) was randomised for all methods.Results: Twenty-nine healthcare staff participated in this study. Correct assessment of HR of 54 bpm as being within the 0-59 range occurred in 17.2% UMB, 17.2% TAP and 31% AUSC and was obtained in <10 seconds by 48.3%, 65.5% and 62.1%, respectively. A rate of 88 bpm was correctly assessed as within the 60-100 range in 82.8% UMB, 79.3% TAP and 79.3% AUSC and was obtained in <10 seconds by 55.2%, 58.6% and 55.2%, respectively. A rate of 128 bpm was identified as >100 bpm by 96.6% UMB, 93.1% TAP, and 93.1% AUSC and was obtained in <10 seconds by 51.7%, 55.2% and 62.1%, respectively.Conclusion: Current methods in assessing rates below 60 bpm are inaccurate and may overestimate HR. We recommend that these methods alone should not be relied upon in neonatal resuscitation and objective assessment of heart rate should be readily available at all newborn resuscitations. [ABSTRACT FROM AUTHOR]- Published
- 2016
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9. Fifty years of Sudanese hospital-based obstetric outcomes and an international partnership.
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Carlson, VM, Omer, MI, Ibrahim, SA, Ahmed, SE, O'Byrne, KJ, Kenny, LC, and Ryan, CA
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NEONATAL mortality , *MATERNAL mortality , *STILLBIRTH , *OBSTETRICS , *BUSINESS partnerships - Abstract
Please cite this paper as: Carlson V, Omer M, Ibrahim S, Ahmed S, O'Byrne K, Kenny L, Ryan C. Fifty years of Sudanese hospital-based obstetric outcomes and an international partnership. BJOG 2011;118:1608-1616. Objective To present 50 years of hospital-based maternal and perinatal outcomes in Sudan, and the role of an international collaboration with an Irish maternity hospital, over the period 2002-2009, in recent health-indicator improvements. Design Retrospective descriptive study. Setting Omdurman Maternity Hospital, Sudan. Population All women who delivered at Omdurman Maternity Hospital, and their newborn infants, from July 1957 to October 2007, comprising 339 448 births. Methods The original logbook data was extracted. Infant and maternal health indicators were calculated according to World Health Organization definitions. Main outcomes measures Total annual births, maternal mortality ratio and maternal complications, neonatal mortality and stillbirth rates, and rates of delivery methods. Results Total births increased 50-fold from 499 in 1958 to 24 913 in 2007. Significant reductions in morbidity and mortality began in the mid-1990s. From 2001 to 2007, maternal mortality fell from 329 to 36 per 100 000 live births: an 85% reduction. Stillbirth rates almost halved, from 35 to 19 per 1000 births in 2001 and 2007, respectively. Neonatal mortality rates remained largely static, at 24 per 1000 live births in 2007, but there is recent evidence of a decline. Conclusion This hospital-based data offers a unique historical portrait of health outcomes in one of the largest maternity hospitals in Africa, and shows steady, sustained improvements in maternal, stillbirth and neonatal mortality rates since the 1990s. The partnership was associated with a number of positive infrastructural, educational, and staffing achievements. Whether it directly contributed to improved health outcomes has not been established. [ABSTRACT FROM AUTHOR]
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- 2011
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10. Sex work, drug use, HIV infection, and spread of sexually transmitted infections in Moscow, Russian Federation.
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Shakarishvili A, Dubovskaya LK, Zohrabyan LS, St Lawrence JS, Aral SO, Dugasheva LG, Okan SA, Lewis JS, Parker KA, Ryan CA, LIBRA (Laboratory and Integrated Behavioural Risk Assessment) Project Investigation Team, Shakarishvili, A, Dubovskaya, L K, Zohrabyan, L S, St Lawrence, J S, Aral, S O, Dugasheva, L G, Okan, S A, Lewis, J S, and Parker, K A
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Rates of HIV-1 infection are growing rapidly, and the epidemic of sexually transmitted infections is continuing at an alarming rate, in the Russian Federation. We did a cross-sectional study of sexually transmitted infections, HIV infection, and drug use in street youth at a juvenile detention facility, adults at homeless detention centres, and women and men at a remand centre in Moscow. 160 (79%) women at the remand centre were sex workers. 91 (51%) homeless women had syphilis. At least one bacterial sexually transmitted infection was present in 97 (58%) female juvenile detainees, 120 (64%) women at the remand centre, and 133 (75%) homeless women. HIV seroprevalence was high in women at the remand centre (n=7 [4%]), adolescent male detainees (5 [3%]), and homeless women (4 [2%]). In view of the interaction between sexually transmitted infections and HIV infection, these findings of high prevalence of sexually transmitted infections show that these disenfranchised populations have the potential to make a disproportionately high contribution to the explosive growth of the HIV epidemic unless interventions targeting these groups are implemented in the Russian Federation. [ABSTRACT FROM AUTHOR]
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- 2005
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11. The predictive value of early neurological examination in neonatal hypoxic-ischaemic encephalopathy and neurodevelopmental outcome at 24 months.
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Murray DM, Bala P, O'Connor CM, Ryan CA, Connolly S, and Boylan GB
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AIM: The clinical and electrographic signs of hypoxic-ischaemic encephalopathy (HIE) evolve over the first days of life. We examined the evolution of neurological signs over the first 3 days of life, and determined whether serial administration of the Amiel-Tison Neurological Assessment at Term (ATNAT) would predict neurodevelopmental outcome at 24 months. METHOD: Term (>37 wks' gestation) neonates born with suspected HIE between May 2003 and May 2005 in a Cork maternity unit were recruited prospectively. Modified Sarnat grading was assigned. The ATNAT was administered on days 1, 2, and 3 of life and a discharge neurological examination. Time to oral feeding and demographic variables were recorded. Developmental status was assessed using the revised Griffiths Mental Development Scales at 6, 12, and 24 months. RESULTS: Fifty-seven infants were recruited, with 51 (31 males, 20 females) included for follow-up. Neurological examination evolved and normalized over the first 3 days of life in many cases. At 24 months, 21 children had an adverse outcome, including six deaths. Examination at all time points correlated significantly with neurological outcome at 24 months. The best correlations were found to be (1) neurological examination at discharge (r=0.65, p<0.001), (2) Sarnat grading (r=0.64, p<0.001), and (3) ATNAT on day 3 (r=0.46, p<0.001). The best predictive value was seen with neurological examination at discharge (positive and negative predictive values of 86% and 72% respectively). INTERPRETATION: Persistence of abnormal neurological signs correlates significantly with adverse outcome. The later a neonatal neurological examination was performed, the better its predictive ability. [ABSTRACT FROM AUTHOR]
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- 2010
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