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Wang M, Tian B, Xue Y, Li R, Zhai T, Tan L. Determination of aminophylline based on fluorescence quenching of amino-functionalized graphene quantum dots induced by photoilluminated riboflavin-aminophylline system. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 235:118306. [PMID: 32247256 DOI: 10.1016/j.saa.2020.118306] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/20/2020] [Accepted: 03/24/2020] [Indexed: 06/11/2023]
Abstract
A new method based on fluorescence spectroscopy for the sensitive determination of aminophylline (AP), an antiasthmatic drug, was developed in this work. Amino-functionalized graphene quantum dots (afGQDs) were synthesized based on a two-step method and they were characterized by transmission electron microscope, UV-vis absorption spectrum and infrared spectrum. The fluorescence of afGQDs was quenched by riboflavin (Rf) via both dynamic quenching and inner filter effect. Photoilluminated Rf-AP system in the presence of oxygen produced hydroxyl radicals (OH). The latter accepted electrons from afGQDs owing to a photo-induced electron transfer process and led to the further fluorescence decline. The changing extent of the fluorescence intensity was found to be proportional to the concentration of AP in the range of 0.10-10 μg mL-1 and the limit of detection arrived at 40 ng mL-1. The proposed method was successfully employed for the determination of AP in a pharmaceutical sample and the recovery rate varied in the range of 99%-106%.
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Affiliation(s)
- Meijuan Wang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Bowen Tian
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Yuanyuan Xue
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Rui Li
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Tingting Zhai
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China
| | - Liang Tan
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, PR China.
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2
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Peñuelas O, Keough E, López-Rodríguez L, Carriedo D, Gonçalves G, Barreiro E, Lorente JÁ. Ventilator-induced diaphragm dysfunction: translational mechanisms lead to therapeutical alternatives in the critically ill. Intensive Care Med Exp 2019; 7:48. [PMID: 31346802 PMCID: PMC6658639 DOI: 10.1186/s40635-019-0259-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 05/23/2019] [Indexed: 02/08/2023] Open
Abstract
Mechanical ventilation [MV] is a life-saving technique delivered to critically ill patients incapable of adequately ventilating and/or oxygenating due to respiratory or other disease processes. This necessarily invasive support however could potentially result in important iatrogenic complications. Even brief periods of MV may result in diaphragm weakness [i.e., ventilator-induced diaphragm dysfunction [VIDD]], which may be associated with difficulty weaning from the ventilator as well as mortality. This suggests that VIDD could potentially have a major impact on clinical practice through worse clinical outcomes and healthcare resource use. Recent translational investigations have identified that VIDD is mainly characterized by alterations resulting in a major decline of diaphragmatic contractile force together with atrophy of diaphragm muscle fibers. However, the signaling mechanisms responsible for VIDD have not been fully established. In this paper, we summarize the current understanding of the pathophysiological pathways underlying VIDD and highlight the diagnostic approach, as well as novel and experimental therapeutic options.
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Affiliation(s)
- Oscar Peñuelas
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain.
- Centro de Investigación en Red de Enfermedades Respiratorias [CIBERES], Instituto de Salud Carlos III [ISCIII], Madrid, Spain.
| | - Elena Keough
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain
| | - Lucía López-Rodríguez
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain
| | - Demetrio Carriedo
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain
| | - Gesly Gonçalves
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain
| | - Esther Barreiro
- Centro de Investigación en Red de Enfermedades Respiratorias [CIBERES], Instituto de Salud Carlos III [ISCIII], Madrid, Spain
- Pulmonology Department-Muscle Wasting and Cachexia in Chronic Respiratory Diseases and Lung Cancer Research Group, IMIM-Hospital del Mar, Parc de Salut Mar, Health and Experimental Sciences Department [CEXS], Barcelona, Spain
- Universitat Pompeu Fabra [UPF], Barcelona Biomedical Research Park [PRBB], Barcelona, Spain
| | - José Ángel Lorente
- Intensive Care Unit, Hospital Universitario de Getafe, Carretera de Toledo, km 12.5, 28905, Getafe, Madrid, Spain
- Centro de Investigación en Red de Enfermedades Respiratorias [CIBERES], Instituto de Salud Carlos III [ISCIII], Madrid, Spain
- Universidad Europea, Madrid, Spain
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3
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Pilarski JQ, Leiter JC, Fregosi RF. Muscles of Breathing: Development, Function, and Patterns of Activation. Compr Physiol 2019; 9:1025-1080. [PMID: 31187893 DOI: 10.1002/cphy.c180008] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review is a comprehensive description of all muscles that assist lung inflation or deflation in any way. The developmental origin, anatomical orientation, mechanical action, innervation, and pattern of activation are described for each respiratory muscle fulfilling this broad definition. In addition, the circumstances in which each muscle is called upon to assist ventilation are discussed. The number of "respiratory" muscles is large, and the coordination of respiratory muscles with "nonrespiratory" muscles and in nonrespiratory activities is complex-commensurate with the diversity of activities that humans pursue, including sleep (8.27). The capacity for speech and adoption of the bipedal posture in human evolution has resulted in patterns of respiratory muscle activation that differ significantly from most other animals. A disproportionate number of respiratory muscles affect the nose, mouth, pharynx, and larynx, reflecting the vital importance of coordinated muscle activity to control upper airway patency during both wakefulness and sleep. The upright posture has freed the hands from locomotor functions, but the evolutionary history and ontogeny of forelimb muscles pervades the patterns of activation and the forces generated by these muscles during breathing. The distinction between respiratory and nonrespiratory muscles is artificial, as many "nonrespiratory" muscles can augment breathing under conditions of high ventilator demand. Understanding the ontogeny, innervation, activation patterns, and functions of respiratory muscles is clinically useful, particularly in sleep medicine. Detailed explorations of how the nervous system controls the multiple muscles required for successful completion of respiratory behaviors will continue to be a fruitful area of investigation. © 2019 American Physiological Society. Compr Physiol 9:1025-1080, 2019.
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Affiliation(s)
- Jason Q Pilarski
- Department of Biological and Dental Sciences, Idaho State University Pocatello, Idaho, USA
| | - James C Leiter
- Department of Molecular and Systems Biology, The Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
| | - Ralph F Fregosi
- Departments of Physiology and Neuroscience, The University of Arizona, Tucson, Arizona, USA
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Laveneziana P, Albuquerque A, Aliverti A, Babb T, Barreiro E, Dres M, Dubé BP, Fauroux B, Gea J, Guenette JA, Hudson AL, Kabitz HJ, Laghi F, Langer D, Luo YM, Neder JA, O'Donnell D, Polkey MI, Rabinovich R, Rossi A, Series F, Similowski T, Spengler C, Vogiatzis I, Verges S. ERS statement on respiratory muscle testing at rest and during exercise. Eur Respir J 2019; 53:13993003.01214-2018. [DOI: 10.1183/13993003.01214-2018] [Citation(s) in RCA: 227] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 02/18/2019] [Indexed: 12/12/2022]
Abstract
Assessing respiratory mechanics and muscle function is critical for both clinical practice and research purposes. Several methodological developments over the past two decades have enhanced our understanding of respiratory muscle function and responses to interventions across the spectrum of health and disease. They are especially useful in diagnosing, phenotyping and assessing treatment efficacy in patients with respiratory symptoms and neuromuscular diseases. Considerable research has been undertaken over the past 17 years, since the publication of the previous American Thoracic Society (ATS)/European Respiratory Society (ERS) statement on respiratory muscle testing in 2002. Key advances have been made in the field of mechanics of breathing, respiratory muscle neurophysiology (electromyography, electroencephalography and transcranial magnetic stimulation) and on respiratory muscle imaging (ultrasound, optoelectronic plethysmography and structured light plethysmography). Accordingly, this ERS task force reviewed the field of respiratory muscle testing in health and disease, with particular reference to data obtained since the previous ATS/ERS statement. It summarises the most recent scientific and methodological developments regarding respiratory mechanics and respiratory muscle assessment by addressing the validity, precision, reproducibility, prognostic value and responsiveness to interventions of various methods. A particular emphasis is placed on assessment during exercise, which is a useful condition to stress the respiratory system.
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Suneby Jagers JV, Ji M, Rothwell B, Easton PA. Aminophylline increases parasternal muscle action in awake canines. Pulm Pharmacol Ther 2019; 56:1-7. [PMID: 30797981 DOI: 10.1016/j.pupt.2019.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 12/23/2018] [Accepted: 02/10/2019] [Indexed: 11/30/2022]
Abstract
The traditional theophylline bronchodilator, aminophylline, is still widely used, especially in the treatment of COPD. The effects of aminophylline on ventilation and action of the costal diaphragm have been previously defined, but other respiratory muscles - notably the chest wall, are not well determined. Therefore, we investigated the effects of aminophylline on the Parasternal intercostal, a key obligatory inspiratory muscle, examining muscle length, shortening and EMG. We studied 11 awake canines, chronically implanted with sonomicrometer crystals and fine-wire EMG electrodes in the parasternal muscle. Ventilatory parameters, muscle length (shortening), and moving average muscle EMG activity, were measured at baseline and with aminophylline, during resting and hypercapnic stimulated breathing. Experiments were carried out prior to administration of aminophylline (baseline), and 1.5 h after loading and ongoing infusion. Minute ventilation, tidal volume and respiratory frequency all increased significantly with aminophylline, both during resting breathing and at equivalent levels of hypercapnic stimulated breathing. Parasternal baseline muscle length was entirely unchanged with aminophylline. Parasternal shortening increased significantly with aminophylline while corresponding parasternal EMG activity remained constant, consistent with increased contractility. Thus, in awake, intact mammals, aminophylline, in the usual therapeutic range, elicits increased ventilation and increased contractility of all primary inspiratory respiratory muscles, including both chest wall and diaphragm.
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Affiliation(s)
- Jenny V Suneby Jagers
- Department of Critical Care Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Michael Ji
- Department of Critical Care Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Bruce Rothwell
- Department of Critical Care Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Paul A Easton
- Department of Critical Care Medicine, University of Calgary, Calgary, Alberta, Canada.
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6
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Yu TJ, Liu YC, Chu CM, Hu HC, Kao KC. Effects of theophylline therapy on respiratory muscle strength in patients with prolonged mechanical ventilation: A retrospective cohort study. Medicine (Baltimore) 2019; 98:e13982. [PMID: 30633180 PMCID: PMC6336648 DOI: 10.1097/md.0000000000013982] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Mechanical ventilation may cause diaphragm weakness an effect termed ventilator-induced diaphragm dysfunction (VIDD). The prevalence of VIDD among patients receiving mechanical ventilation is very high, with the degree of diaphragmatic atrophy being associated with the length of mechanical ventilation. Theophylline is known to increase diaphragmatic contractility and reduce fatigue, so in this study, we evaluated the effect of theophylline in patients with prolonged mechanical ventilation.Patients who depended on mechanical ventilation were included in the study. We compared the maximum inspiratory pressure (PImax) values, rapid shallow breathing index (RSBI) values, and successful weaning rates of theophylline-treated and non-theophylline-treated patients.Eighty-four patients received theophylline and 76 patients did not. These 2 groups' clinical characteristics, including their PImax and RSBI at initial admission, were similar. The results showed that the theophylline-treated group had significantly better PImax and RSBI, with a higher last PImax (30.1 ± 9.7 cmH2O vs 26.9 ± 9.1 cmH2O; P = .034) and lower last RSBI (107.0 ± 68.4 vs 131.4 ± 77.7; P = .036). The improvements to each respective patient's PImax and RSBI were also significantly higher in the theophylline-treated group (PImax: 20.1 ± 5.7% vs 3.2 ± 1.1%, P = .005; RSBI: 11.2 ± 3.0% vs 2.7 ± 1.6%, P = .015). The weaning success rate of the theophylline-treated group was also higher, but not significantly so.Theophylline might improve respiratory muscle strength in patients with prolonged mechanical ventilation and it needs further prospective studies to confirm.
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Affiliation(s)
- Teng-Jen Yu
- Department of Pulmonary and Critical Care Medicine, Chang-Gung Memorial Hospital, Keelung
| | - Yu-Chih Liu
- Department of Pulmonary and Critical Care Medicine, Chang-Gung Memorial Hospital, Keelung
| | - Chien-Min Chu
- Department of Pulmonary and Critical Care Medicine, Chang-Gung Memorial Hospital, Keelung
| | - Han-Chung Hu
- Department of Thoracic Medicine, Chang-Gung Memorial Hospital
- Department of Respiratory Therapy, Chang-Gung University, Taoyuan, Taiwan
| | - Kuo-Chin Kao
- Department of Thoracic Medicine, Chang-Gung Memorial Hospital
- Department of Respiratory Therapy, Chang-Gung University, Taoyuan, Taiwan
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Criner GJ, Celli BR. Failure of Low-Dose Theophylline to Prevent Exacerbations in Patients With COPD. JAMA 2018; 320:1541-1542. [PMID: 30326108 DOI: 10.1001/jama.2018.14295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Gerard J Criner
- Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania
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8
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Acquired Central Hypoventilation Syndrome Unmasked by Propofol Sedation. J Neurosurg Anesthesiol 2018; 31:265-266. [PMID: 29432278 DOI: 10.1097/ana.0000000000000491] [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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9
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Sevilla Berrios RA, Gay PC. Advances and New Approaches to Managing Sleep-Disordered Breathing Related to Chronic Pulmonary Disease. Sleep Med Clin 2016; 11:257-64. [PMID: 27236061 DOI: 10.1016/j.jsmc.2016.01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is a common disease affecting about 20 million US adults. Sleep-disordered breathing (SDB) problems are frequent and poorly characterized for patients with COPD. Both the well-known success of noninvasive ventilation (NIV) in the acute COPD exacerbation in the hospital setting and that NIV is the cornerstone of chronic therapy for SDBs have urged the attention of the medical community to determine the impact of NIV on chronic COPD management with and without coexisting SDBs. Early observational studies showed decreased long-term survival rates on patients with COPD with concomitant chronic hypercapnia when compared with normocapnic patients.
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Affiliation(s)
| | - Peter C Gay
- Pulmonary, Critical Care and Sleep Medicine, Mayo Clinic, 200 1st Street Southwest, Rochester, MN 55905, USA.
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10
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Kim WY, Park SH, Kim WY, Huh JW, Hong SB, Koh Y, Lim CM. Effect of theophylline on ventilator-induced diaphragmatic dysfunction. J Crit Care 2016; 33:145-50. [PMID: 26948253 DOI: 10.1016/j.jcrc.2016.01.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 11/13/2015] [Accepted: 01/06/2016] [Indexed: 12/18/2022]
Abstract
PURPOSE To evaluate the effect of theophylline in patients with ventilator-induced diaphragmatic dysfunction (VIDD). MATERIALS AND METHODS Patients who required mechanical ventilation at least 72 hours, met the criteria for a spontaneous breathing trial, and had evidence of VIDD by ultrasonography were included in the study. RESULTS Of the 40 patients, 21 received theophylline and 19 did not. Clinical characteristics were similar in the 2 groups. Assessment of VIDD showed no between-group differences in baseline diaphragmatic excursion (DE) of both hemidiaphragms. Changes in DE from baseline to 72 hours (ΔDE) were significantly higher in the theophylline group than in the nontheophylline group in the right (3.5 ± 4.5 mm vs 0.4 ± 2.1 mm; P = .004) and left (3.2 ± 5.1 mm vs 0.1 ± 4.0 mm; P = .03) hemidiaphragms and in the total DE of both diaphragms (6.9 ± 9.1 mm vs 0.5 ± 5.7 mm; P = .02). In the theophylline group, theophylline was effective for the diaphragms with VIDD, whereas it was not effective for the diaphragms without VIDD. ΔDE in the right (rs = -0.49, P = .006) hemidiaphragm and total Δ DE in both diaphragms (rs = -0.46, P = .01) correlated negatively with weaning time. CONCLUSIONS Theophylline significantly improved diaphragmatic movements in patients with VIDD. Our results warrant a larger study to determine whether theophylline use has benefits during weaning from mechanical ventilation.
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Affiliation(s)
- Won-Young Kim
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Songpa-gu, Seoul, Republic of Korea.
| | - So Hee Park
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Songpa-gu, Seoul, Republic of Korea.
| | - Won Young Kim
- Department of Emergency Medicine, Asan Medical Center, University of Ulsan College of Medicine, Songpa-gu, Seoul, Republic of Korea.
| | - Jin Won Huh
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Songpa-gu, Seoul, Republic of Korea.
| | - Sang-Bum Hong
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Songpa-gu, Seoul, Republic of Korea.
| | - Younsuck Koh
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Songpa-gu, Seoul, Republic of Korea.
| | - Chae-Man Lim
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Songpa-gu, Seoul, Republic of Korea.
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Al-Eyadhy AA, Temsah MH, Alhaboob AAN, Aldubayan AK, Almousa NA, Alsharidah AM, Alangari MI, Alshaya AM. Asthma changes at a pediatric intensive care unit after 10 years: Observational study. Ann Thorac Med 2015; 10:243-8. [PMID: 26664561 PMCID: PMC4652289 DOI: 10.4103/1817-1737.165302] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVES: To describe the change in the management, and outcome of children with acute severe asthma (ASA) admitted to Pediatric Intensive Care Unit (PICU) at tertiary institute, as compared to previously published report in 2003. METHODS: This is a retrospective observational study. All consecutive pediatric ASA patients who were admitted to PICU during the study period were included. The data were extracted from PICU database and medical records. The Cohort in this study (2013 Cohort) was compared with the Cohort of ASA, which was published in 2003 from the same institution (2003 Cohort). RESULTS: In comparison to previous 2003 Cohort, current Cohort (2013) revealed higher mean age (5.5 vs. 3.6 years; P ≤ 0.001), higher rate of PICU admission (20.3% vs. 3.6%; P ≤ 0.007), less patients who received maintenance inhaled steroids (43.3% vs. 62.4%; P ≤ 0.03), less patients with pH <7.3 (17.9% vs. 42.9%; P ≤ 0.001). There were more patients in 2013 Cohort who received: Inhaled Ipratropium bromide (97% vs. 68%; P ≤ 0.001), intravenous magnesium sulfate (68.2% vs. none), intravenous salbutamol (13.6% vs. 3.6%; P ≤ 0.015), and noninvasive ventilation (NIV) (35.8% vs. none) while no patients were treated with theophylline (none vs. 62.5%). The median length of stay (LOS) was 2 days while mean LOS was half a day longer in the 2013 Cohort. None of our patients required intubation, and there was no mortality. CONCLUSION: We observed slight shift toward older age, considerably increased the rate of PICU admission, increased utilization of Ipratropium bromide, magnesium sulfate, and NIV as important modalities of treatment.
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Affiliation(s)
- Ayman A Al-Eyadhy
- Pediatric Intensive Care Unit, Department of Pediatrics, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Mohamad-Hani Temsah
- Pediatric Intensive Care Unit, Department of Pediatrics, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Ali A N Alhaboob
- Pediatric Intensive Care Unit, Department of Pediatrics, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Abdulmalik K Aldubayan
- Pediatric Intensive Care Unit, Department of Pediatrics, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Nasser A Almousa
- Pediatric Intensive Care Unit, Department of Pediatrics, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Abdulrahman M Alsharidah
- Pediatric Intensive Care Unit, Department of Pediatrics, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed I Alangari
- Pediatric Intensive Care Unit, Department of Pediatrics, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Abdulrahman M Alshaya
- Pediatric Intensive Care Unit, Department of Pediatrics, College of Medicine, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
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