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Vale J, Bird K, Mayl C, Allen J, Richards P, O’Toole R, Wilson E. 16POP-UP DELIRIUM SIMULATION TRAINING. Age Ageing 2019. [DOI: 10.1093/ageing/afy211.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Beeler W, Griffith K, Jones R, Chapman C, Holliday E, Lalani N, Wilson E, Bonner J, Formenti S, Hahn S, Kalnicki S, Liu F, Movsas B, Thomas C, Jagsi R. Gender, Professional Experiences, and Personal Characteristics of Academic Radiation Oncology Chairs. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.06.377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Adekunle R, Jonchhe S, Ravichandran B, Wilson E, Husson J. Hepatitis C genotype change after transplantation utilizing hepatitis C positive donor organs. Transpl Infect Dis 2018; 20:e12925. [PMID: 29797655 DOI: 10.1111/tid.12925] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 01/07/2018] [Accepted: 01/14/2018] [Indexed: 12/15/2022]
Abstract
A shortage in organs for transplantation has led to the increased use of hepatitis C (HCV) infected donor organs for solid organ transplant recipients infected with HCV. However, the donor HCV genotype is not routinely checked or known prior to transplant. Here, we report 4 cases of genotype conversion after transplantation in patients receiving HCV infected donor organs. This change in genotype may potentially impact HCV progression as well as treatment choice for these patients.
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Moi D, Wilson E, Weinert D, Chiaretti S, Mazzieri R. Adoptive transfer of genetically engineered monocytes for the tumour targeted delivery of IFN-alpha. Cytotherapy 2018. [DOI: 10.1016/j.jcyt.2018.02.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Goodall R, Claireaux H, Hill J, Wilson E, Monsell F, BOAST 11 Collaborative, Tarassoli P. Comparison between a multicentre, collaborative, closed-loop audit assessing management of supracondylar fractures and the British Orthopaedic Association Standard for Trauma 11 (BOAST 11) guidelines. Bone Joint J 2018; 100-B:346-351. [DOI: 10.1302/0301-620x.100b3.bjj-2017-0780.r2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Aims Supracondylar fractures are the most frequently occurring paediatric fractures about the elbow and may be associated with a neurovascular injury. The British Orthopaedic Association Standards for Trauma 11 (BOAST 11) guidelines describe best practice for supracondylar fracture management. This study aimed to assess whether emergency departments in the United Kingdom adhere to BOAST 11 standard 1: a documented assessment, performed on presentation, must include the status of the radial pulse, digital capillary refill time, and the individual function of the radial, median (including the anterior interosseous), and ulnar nerves. Materials and Methods Stage 1: We conducted a multicentre, retrospective audit of adherence to BOAST 11 standard 1. Data were collected from eight hospitals in the United Kingdom. A total of 433 children with Gartland type 2 or 3 supracondylar fractures were eligible for inclusion. A centrally created data collection sheet was used to guide objective analysis of whether BOAST 11 standard 1 was adhered to. Stage 2: We created a quality improvement proforma for use in emergency departments. This was piloted in one of the hospitals used in the primary audit and was re-audited using equivalent methodology. In all, 102 patients presenting between January 2016 and July 2017 were eligible for inclusion in the re-audit. Results Stage 1: Of 433 patient notes audited, adherence to BOAST 11 standard 1 was between 201 (46%) and 232 (54%) for the motor and sensory function of the individual nerves specified, 318 (73%) for radial pulse, and 247 (57%) for digital capillary refill time. Stage 2: Of 102 patient notes audited, adherence to BOAST 11 standard 1 improved to between 72 (71%) and 80 (78%) for motor and sensory function of the nerves, to 84 (82%) for radial pulse, and to 82 (80%) for digital capillary refill time. Of the 102 case notes reviewed in stage 2, only 44 (43%) used the quality improvement proforma; when the proforma was used, adherence improved to between 40 (91%) and 43 (98%) throughout. Conclusion Adherence to BOAST 11 standard 1 is poor in hospitals across the country. This is concerning as neurovascular deficit may be an indication for emergent surgery, and missed neurovascular injury can cause long-term, or even permanent, functional impairment. We present a simple proforma that improves adherence to this standard, can easily be implemented into emergency departments, and may improve patient safety. Cite this article: Bone Joint J 2018;100-B:346–51.
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Tang L, Parker A, Flores Y, Dellario M, Dickson C, Amoroso A, Kottilil S, Wilson E. Treatment of hepatitis C with 8 weeks of ledipasvir/sofosbuvir: Highly effective in a predominantly black male patient population. J Viral Hepat 2018; 25:205-208. [PMID: 28984059 DOI: 10.1111/jvh.12796] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/28/2017] [Indexed: 01/25/2023]
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Ansari S, Régis JM, Jolie J, Saed-Samii N, Warr N, Korten W, Zielińska M, Salsac MD, Blanc A, Jentschel M, Köster U, Mutti P, Soldner T, Simpson G, Drouet F, Vancraeyenest A, de France G, Clément E, Stezowski O, Ur C, Urban W, Regan P, Podolyák Z, Larijani C, Townsley C, Carroll R, Wilson E, Mach H, Fraile L, Paziy V, Olaizola B, Vedia V, Bruce A, Roberts O, Smith J, Scheck M, Kröll T, Hartig AL, Ignatov A, Ilieva S, Lalkovski S, Mărginean N, Otsuka T, Shimizu N, Togashi T, Tsunoda Y. Lifetime measurement in neutron-rich A~100 nuclei. EPJ WEB OF CONFERENCES 2018. [DOI: 10.1051/epjconf/201819305003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Lifetimes of excited states of the 98;100;102Zr nuclei were measured by using the Generalized Centroid Difference Method. The nuclei of interest were populated via neutron-induced fission of 241Pu and 235U during the EXILL-FATIMA campaign. The obtained lifetimes were used to calculate the B(E2) transition strengths and β deformation parameters which were then compared with the recent theoretical predictions obtained with Monte Carlo Shell Model.
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Wilson E, Stonier T, Simson N, Stergios C. Bowel Perforation Presenting Three Months After Suprapubic Catheter Insertion. Int J Surg 2017. [DOI: 10.1016/j.ijsu.2017.08.148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Caruthers D, Brame S, Palta J, Hagan M, Wilson E, Cowan C, Yun L, Brown S, DeBerry L, Mutic S, Bosch W, Robinson C, Michalski J, Abraham C. Development and Implementation of Quality Measures for the Survey Based Performance Assessment of Radiation Therapy in the VA. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shrivastava S, Wilson E, Poonia B, Tang L, Osinusi A, Kohli A, Kottilil S. Augmentation of hepatitis C virus-specific immunity and sustained virologic response. J Viral Hepat 2017; 24:742-749. [PMID: 28267900 PMCID: PMC10836410 DOI: 10.1111/jvh.12702] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 02/12/2017] [Indexed: 12/23/2022]
Abstract
Treatment for chronic hepatitis C virus (HCV) infection has rapidly evolved into interferon-free directly acting antiviral regimens (DAA) that result in high sustained virologic response. DAAs primarily work by suppressing HCV replication and rely less on the immune system than interferon-based therapies. However, it is unclear whether the immune system recovers with suppression of HCV replication and contributes to HCV clearance with DAA therapy. We previously demonstrated HCV clearance is associated with increased HCV-specific immunity in CHCV-GT-1-infected patients during treatment with sofosbuvir (SOF)+ribavirin (RBV). Here, we aimed to analyse changes in HCV-specific immunological responses associated with viral clearance with combination DAA therapy of SOF+ledipasvir (LDV) for 12 weeks in CHCV-GT1 (N=14) patients who relapsed without augmentation of HCV-specific immunity during treatment with SOF+RBV. Phenotypic and functional changes within the T-cell compartment of PBMCs pre- and post-treatment were analysed. Retreatment of relapsers with LDV/SOF resulted in all patients attaining SVR12 . Suppression of HCV was associated with a decline in T-cell exhaustion markers (CD57; Tim3; PD1) along with augmented of HCV-specific T-cell IFN-gamma responses post-treatment. Addition of LDV to SOF was associated with augmentation of HCV-specific immunity and SVR in patients who previously failed SOF+RBV therapy without increased immunity. These findings demonstrate a novel effect of DAA in inducing host immune responses to aid HCV clearance and achieve SVR.
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Haggerty A, Zhang X, Wilson E, Wong V, Schmitz K, Ko E, Mastroyannis S. Weight changes after the diagnosis of endometrial cancer. Gynecol Oncol 2017. [DOI: 10.1016/j.ygyno.2017.03.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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O'Hagan R, Marx M, Finnegan K, Naphini P, Ng'ambi K, Laija K, Wilson E, Park L, Wachepa S, Smith J, Gombwa L, Misomali A, Mleme T, Yosefe S. Getting High Quality Data to Drive Programs: How is the Quality of the
Data Collection System Associated with the Quality of Routine Health Data in
Malawi? Ann Glob Health 2017. [DOI: 10.1016/j.aogh.2017.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Samson A, Scott K, Taggart D, West E, Wilson E, Nuovo G, Thomson S, Stead L, Short S, Melcher A. P07.05 Intravenous delivery of oncolytic reovirus to brain tumours in patients to immunologically prime for sequential checkpoint blockade. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Podolyák Z, Shand CM, Lalović N, Gerl J, Rudolph D, Alexander T, Boutachkov P, Cortés ML, Górska M, Kojouharov I, Kurz N, Louchart C, Merchán E, Michelagnoli C, Pérez-Vidal RM, Pietri S, Ralet D, Reese M, Schaffner H, Stahl C, Weick H, Ameil F, de Angelis G, Arici T, Carroll R, Dombrádi Z, Gadea A, Golubev P, Lettmann M, Lizarazo C, Mahboub D, Pai H, Patel Z, Pietralla N, Regan PH, Sarmiento LG, Wieland O, Wilson E, Birkenbach B, Bruyneel B, Burrows I, Charles L, Clément E, Crespi FCL, Cullen DM, Désesquelles P, Eberth J, González V, Habermann T, Harkness-Brennan L, Hess H, Judson DS, Jungclaus A, Korten W, Labiche M, Maj A, Mengoni D, Napoli DR, Pullia A, Quintana B, Rainovski G, Reiter P, Salsac MD, Sanchis E, Valiente Dóbon JJ. Role of the Δ Resonance in the Population of a Four-Nucleon State in the ^{56}Fe→^{54}Fe Reaction at Relativistic Energies. PHYSICAL REVIEW LETTERS 2016; 117:222302. [PMID: 27925748 DOI: 10.1103/physrevlett.117.222302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Indexed: 06/06/2023]
Abstract
The ^{54}Fe nucleus was populated from a ^{56}Fe beam impinging on a Be target with an energy of E/A=500 MeV. The internal decay via γ-ray emission of the 10^{+} metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the ^{56}Fe ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of ^{54}Fe, suggesting that it was populated via the decay of the Δ^{0} resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10^{+} metastable state in ^{54}Fe is a consequence of the quark structure of the nucleons.
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Tang L, Ward H, Kattakuzhy S, Wilson E, Kottilil S. Dual sofosbuvir and ribavirin therapy for chronic hepatitis C infection. Expert Rev Gastroenterol Hepatol 2016; 10:21-36. [PMID: 26558305 DOI: 10.1586/17474124.2016.1119042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Sofosbuvir is the first pan-genotypic direct acting antiviral agent to be approved. This article provides an overview of the pharmacology of sofosbuvir and ribavirin and a comprehensive summary of the phase 2 and 3 studies supporting dual sofosbuvir and ribavirin therapy for chronic hepatitis C infection. With the production of generic formulations of sofosbuvir, we anticipate this regimen leading the first wave for widespread, IFN-free treatment and becoming first line for all genotypes (including genotype 1) for much of the world-in particular in developing and middle income countries. We discuss the continued challenges with this regimen including among patients with decompensated liver disease and post-liver transplant, and renal failure. We address concerns of emerging resistance. We also discuss the future prospects including the global uptake of sofosbuvir and ribavirin for the treatment of all genotypes.
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Caballero-Folch R, Domingo-Pardo C, Agramunt J, Algora A, Ameil F, Arcones A, Ayyad Y, Benlliure J, Borzov IN, Bowry M, Calviño F, Cano-Ott D, Cortés G, Davinson T, Dillmann I, Estrade A, Evdokimov A, Faestermann T, Farinon F, Galaviz D, García AR, Geissel H, Gelletly W, Gernhäuser R, Gómez-Hornillos MB, Guerrero C, Heil M, Hinke C, Knöbel R, Kojouharov I, Kurcewicz J, Kurz N, Litvinov YA, Maier L, Marganiec J, Marketin T, Marta M, Martínez T, Martínez-Pinedo G, Montes F, Mukha I, Napoli DR, Nociforo C, Paradela C, Pietri S, Podolyák Z, Prochazka A, Rice S, Riego A, Rubio B, Schaffner H, Scheidenberger C, Smith K, Sokol E, Steiger K, Sun B, Taín JL, Takechi M, Testov D, Weick H, Wilson E, Winfield JS, Wood R, Woods P, Yeremin A. First Measurement of Several β-Delayed Neutron Emitting Isotopes Beyond N=126. PHYSICAL REVIEW LETTERS 2016; 117:012501. [PMID: 27419564 DOI: 10.1103/physrevlett.117.012501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Indexed: 06/06/2023]
Abstract
The β-delayed neutron emission probabilities of neutron rich Hg and Tl nuclei have been measured together with β-decay half-lives for 20 isotopes of Au, Hg, Tl, Pb, and Bi in the mass region N≳126. These are the heaviest species where neutron emission has been observed so far. These measurements provide key information to evaluate the performance of nuclear microscopic and phenomenological models in reproducing the high-energy part of the β-decay strength distribution. This provides important constraints on global theoretical models currently used in r-process nucleosynthesis.
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Martin MJ, Wilson E, Gerrard-Tarpey W, Meakin G, Hearson G, McKeever TM, Shaw DE, Harrison TW. The utility of exhaled nitric oxide in patients with suspected asthma. Thorax 2016; 71:562-4. [PMID: 26903595 DOI: 10.1136/thoraxjnl-2015-208014] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 01/28/2016] [Indexed: 11/03/2022]
Abstract
The value of FENO measurements in patients with symptoms suggestive of asthma is unclear. We performed an observational study to assess the ability of FENO to diagnose asthma and to predict response to inhaled corticosteroids (ICS). Our findings suggest FENO is not useful for asthma diagnosis but is accurate at predicting ICS response.
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Libby V, Bou Nemer L, Wilson E. Fertility and the reproductive tract in a woman with caudal duplication syndrome. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2015.12.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zia A, Lau M, Journeycake J, Sarode R, Marshall J, De Simone N, Wilson E, Winborn A, Kouides P. Developing a multidisciplinary Young Women's Blood Disorders Program: a single-centre approach with guidance for other centres. Haemophilia 2016; 22:199-207. [DOI: 10.1111/hae.12836] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2015] [Indexed: 11/29/2022]
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Monfaredi R, Wilson E, Sze R, Sharma K, Azizi B, Iordachita I, Cleary K. Shoulder-Mounted Robot for MRI-guided arthrography: Accuracy and mounting study. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:3643-6. [PMID: 26737082 DOI: 10.1109/embc.2015.7319182] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A new version of our compact and lightweight patient-mounted MRI-compatible 4 degree-of-freedom (DOF) robot for MRI-guided arthrography procedures is introduced. This robot could convert the traditional two-stage arthrography procedure (fluoroscopy-guided needle insertion followed by a diagnostic MRI scan) to a one-stage procedure, all in the MRI suite. The results of a recent accuracy study are reported. A new mounting technique is proposed and the mounting stability is investigated using optical and electromagnetic tracking on an anthropomorphic phantom. Five volunteer subjects including 2 radiologists were asked to conduct needle insertion in 4 different random positions and orientations within the robot's workspace and the displacement of the base of the robot was investigated during robot motion and needle insertion. Experimental results show that the proposed mounting method is stable and promising for clinical application.
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Pollok K, Wilson E, Seymour J. O-64 Patient responses to advance care planning in community health care settings. BMJ Support Palliat Care 2015. [DOI: 10.1136/bmjspcare-2015-000978.63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ericson JE, Arnold C, Cheeseman J, Cho J, Kaneko S, Wilson E, Clark RH, Benjamin DK, Chu V, Smith PB, Hornik CP. Use and Safety of Erythromycin and Metoclopramide in Hospitalized Infants. J Pediatr Gastroenterol Nutr 2015; 61:334-9. [PMID: 25806675 PMCID: PMC4553109 DOI: 10.1097/mpg.0000000000000792] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
OBJECTIVE Prokinetic medications are used in premature infants to promote motility and decrease time to full enteral feeding. Erythromycin and metoclopramide are the most commonly used prokinetic medications in the neonatal intensive care unit (NICU), but their safety profile is not well defined. METHODS We conducted a large retrospective cohort study using data from 348 NICUs managed by the Pediatrix Medical Group. All of the infants exposed to ≥1 dose of erythromycin, metoclopramide, or both, from a cohort of 8,87,910 infants discharged between 1997 and 2012 were included. We collected laboratory and clinical information while infants were exposed to erythromycin or metoclopramide and described the frequency of laboratory abnormalities and clinical adverse events (AEs). RESULTS Metoclopramide use increased from 1997 to 2005 and decreased from 2005 to 2012, whereas erythromycin use remained stable. Erythromycin use was most often associated with a diagnosis of feeding problem (40%), whereas metoclopramide was most often associated with a diagnosis of gastroesophageal reflux (59%). The most common laboratory AE during exposure to erythromycin or metoclopramide was hyperkalemia (8.6/1000 infant days on erythromycin and 11.0/1000 infant days on metoclopramide). Incidence of pyloric stenosis was greater with erythromycin than with metoclopramide (10/1095, 0.9% vs 76/19,001, 0.4%; P = 0.01), but odds were not significantly increased after adjusting for covariates (odds ratio 0.52, 95% confidence interval [CI] 0.26-1.02, P = 0.06). More infants experienced an AE while treated with metoclopramide than with erythromycin (odds ratio 1.21, 95% CI 1.03-1.43). CONCLUSIONS Metoclopramide was associated with increased risk of AEs compared with erythromycin. Studies are needed to confirm safety and effectiveness of both the drugs in infants.
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Groom N, Wilson E, Falk S, Faivre-Finn C. PO-0656: Effect of accurate heart outlining on radiation dose to the heart - the CONVERT Trial experience. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40648-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Dongaonkar RM, Nguyen TL, Quick CM, Heaps CL, Hardy J, Laine GA, Wilson E, Stewart RH. Mesenteric lymphatic vessels adapt to mesenteric venous hypertension by becoming weaker pumps. Am J Physiol Regul Integr Comp Physiol 2014; 308:R391-9. [PMID: 25519727 DOI: 10.1152/ajpregu.00196.2014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Lymphangions, the segments of lymphatic vessels between two adjacent lymphatic valves, actively pump lymph. Acute changes in transmural pressure and lymph flow have profound effects on lymphatic pump function in vitro. Chronic changes in pressure and flow in vivo have also been reported to lead to significant changes in lymphangion function. Because changes in pressure and flow are both cause and effect of adaptive processes, characterizing adaptation requires a more fundamental analysis of lymphatic muscle properties. Therefore, the purpose of the present work was to use an intact lymphangion isovolumetric preparation to evaluate changes in mesenteric lymphatic muscle mechanical properties and the intracellular Ca(2+) in response to sustained mesenteric venous hypertension. Bovine mesenteric veins were surgically occluded to create mesenteric venous hypertension. Postnodal mesenteric lymphatic vessels from mesenteric venous hypertension (MVH; n = 6) and sham surgery (Sham; n = 6) animals were isolated and evaluated 3 days after the surgery. Spontaneously contracting MVH vessels generated end-systolic active tension and end-diastolic active tension lower than the Sham vessels. Furthermore, steady-state active tension and intracellular Ca(2+) concentration levels in response to KCl stimulation were also significantly lower in MVH vessels compared with those of the Sham vessels. There was no significant difference in passive tension in lymphatic vessels from the two groups. Taken together, these results suggest that following 3 days of mesenteric venous hypertension, postnodal mesenteric lymphatic vessels adapt to become weaker pumps with decreased cytosolic Ca(2+) concentration.
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Anderson J, Hodgson D, Wilson E, Harrison T, Shaw D. P49 Can The Asthma Control Questionnaire (acq) And/or The Blood Eosinophil Count Accurately Detect Sputum Eosinophilia? Thorax 2014. [DOI: 10.1136/thoraxjnl-2014-206260.190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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