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Memisoglu A, Hinton M, Elsayed Y, Graham R, Dakshinamurti S. Assessment of Autoregulation of the Cerebral Circulation during Acute Lung Injury in a Neonatal Porcine Model. CHILDREN (BASEL, SWITZERLAND) 2024; 11:611. [PMID: 38790606 PMCID: PMC11119854 DOI: 10.3390/children11050611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/30/2024] [Accepted: 05/15/2024] [Indexed: 05/26/2024]
Abstract
In neonates with acute lung injury (ALI), targeting lower oxygenation saturations is suggested to limit oxygen toxicity while maintaining vital organ function. Although thresholds for cerebral autoregulation are studied for the management of premature infants, the impact of hypoxia on hemodynamics, tissue oxygen consumption and extraction is not well understood in term infants with ALI. We examined hemodynamics, cerebral autoregulation and fractional oxygen extraction, as measured by near-infrared spectroscopy (NIRS) and blood gases, in a neonatal porcine oleic acid injury model of moderate ALI. We hypothesized that in ALI animals, cerebral oxygen extraction would be increased to a greater degree than kidney or gut oxygen extraction as indicative of the brain's adaptive efforts to increase cerebral oxygen extraction at the expense of splanchnic end organs. Fifteen anesthetized, ventilated 5-day-old neonatal piglets were divided into moderate lung injury by treatment with oleic acid or control (sham injection). The degree of lung injury was quantified at baseline and after establishment of ALI by blood gases, ventilation parameters and calculated oxygenation deficit, hemodynamic indices by echocardiography and lung injury score by ultrasound. PaCO2 was maintained constant during ventilation. Cerebral, renal and gut oxygenation was determined by NIRS during stepwise decreases in inspired oxygen from 50% to 21%, correlated with PaO2 and PvO2; changes in fractional oxygen extraction (ΔFOE) were calculated from NIRS and from regional blood gas samples. The proportion of cerebral autoregulation impairment attributable to blood pressure, and to hypoxemia, was calculated from autoregulation nomograms. ALI manifested as hypoxemia with increasing intrapulmonary shunt fraction, decreased lung compliance and increased resistance, and marked increase in lung ultrasound score. Brain, gut and renal NIRS, obtained from probes placed over the anterior skull, central abdomen and flank, respectively, correlated with concurrent SVC (brain) or IVC (gut, renal) PvO2 and SvO2. Cerebral autoregulation was impaired after ALI as a function of blood pressure at all FiO2 steps, but predominantly by hypoxemia at FiO2 < 40%. Cerebral ΔFOE was higher in ALI animals at all FiO2 steps. We conclude that in an animal model of neonatal ALI, cerebrovascular blood flow regulation is primarily dependent on oxygenation. There is not a defined oxygenation threshold below which cerebral autoregulation is impaired in ALI. Cerebral oxygen extraction is enhanced in ALI, reflecting compensation for exhausted cerebral autoregulation due to the degree of hypoxemia and/or hypotension, thereby protecting against tissue hypoxia.
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Affiliation(s)
- Asli Memisoglu
- Biology of Breathing Theme, Children’s Hospital Research Institute of Manitoba, Winnipeg, MB R3E 3P4, Canada; (A.M.); (M.H.)
| | - Martha Hinton
- Biology of Breathing Theme, Children’s Hospital Research Institute of Manitoba, Winnipeg, MB R3E 3P4, Canada; (A.M.); (M.H.)
- Department of Physiology, University of Manitoba, 745 Bannatyne Ave., Winnipeg, MB R3E 0J9, Canada
| | - Yasser Elsayed
- Section of Neonatology, Department of Pediatrics, Women’s Hospital, Health Sciences Centre, 665 William Ave., Winnipeg, MB R3E 0L8, Canada;
| | - Ruth Graham
- Departments of Anesthesiology, Perioperative and Pain Medicine, Health Sciences Centre, 671 William Ave., Winnipeg, MB R3E 0Z3, Canada;
| | - Shyamala Dakshinamurti
- Biology of Breathing Theme, Children’s Hospital Research Institute of Manitoba, Winnipeg, MB R3E 3P4, Canada; (A.M.); (M.H.)
- Department of Physiology, University of Manitoba, 745 Bannatyne Ave., Winnipeg, MB R3E 0J9, Canada
- Section of Neonatology, Department of Pediatrics, Women’s Hospital, Health Sciences Centre, 665 William Ave., Winnipeg, MB R3E 0L8, Canada;
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Alhumaid S, Alabdulqader M, Al Dossary N, Al Alawi Z, Alnaim AA, Al Mutared KM, Al Noaim K, Al Ghamdi MA, Albahrani SJ, Alahmari AA, Al Hajji Mohammed SM, Almatawah YA, Bayameen OM, Alismaeel AA, Alzamil SK, Alturki SA, Albrahim ZR, Al Bagshi NA, Alshawareb HY, Alhudar JA, Algurairy QA, Alghadeer SM, Alhadab HA, Aljubran TN, Alabdulaly YA, Al Mutair A, Rabaan AA. Global Coinfections with Bacteria, Fungi, and Respiratory Viruses in Children with SARS-CoV-2: A Systematic Review and Meta-Analysis. Trop Med Infect Dis 2022; 7:tropicalmed7110380. [PMID: 36422931 PMCID: PMC9698370 DOI: 10.3390/tropicalmed7110380] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/01/2022] [Accepted: 11/07/2022] [Indexed: 11/18/2022] Open
Abstract
Background: Coinfection with bacteria, fungi, and respiratory viruses has been described as a factor associated with more severe clinical outcomes in children with COVID-19. Such coinfections in children with COVID-19 have been reported to increase morbidity and mortality. Objectives: To identify the type and proportion of coinfections with SARS-CoV-2 and bacteria, fungi, and/or respiratory viruses, and investigate the severity of COVID-19 in children. Methods: For this systematic review and meta-analysis, we searched ProQuest, Medline, Embase, PubMed, CINAHL, Wiley online library, Scopus, and Nature through the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines for studies on the incidence of COVID-19 in children with bacterial, fungal, and/or respiratory coinfections, published from 1 December 2019 to 1 October 2022, with English language restriction. Results: Of the 169 papers that were identified, 130 articles were included in the systematic review (57 cohort, 52 case report, and 21 case series studies) and 34 articles (23 cohort, eight case series, and three case report studies) were included in the meta-analysis. Of the 17,588 COVID-19 children who were tested for co-pathogens, bacterial, fungal, and/or respiratory viral coinfections were reported (n = 1633, 9.3%). The median patient age ranged from 1.4 months to 144 months across studies. There was an increased male predominance in pediatric COVID-19 patients diagnosed with bacterial, fungal, and/or viral coinfections in most of the studies (male gender: n = 204, 59.1% compared to female gender: n = 141, 40.9%). The majority of the cases belonged to White (Caucasian) (n = 441, 53.3%), Asian (n = 205, 24.8%), Indian (n = 71, 8.6%), and Black (n = 51, 6.2%) ethnicities. The overall pooled proportions of children with laboratory-confirmed COVID-19 who had bacterial, fungal, and respiratory viral coinfections were 4.73% (95% CI 3.86 to 5.60, n = 445, 34 studies, I2 85%, p < 0.01), 0.98% (95% CI 0.13 to 1.83, n = 17, six studies, I2 49%, p < 0.08), and 5.41% (95% CI 4.48 to 6.34, n = 441, 32 studies, I2 87%, p < 0.01), respectively. Children with COVID-19 in the ICU had higher coinfections compared to ICU and non-ICU patients, as follows: respiratory viral (6.61%, 95% CI 5.06−8.17, I2 = 0% versus 5.31%, 95% CI 4.31−6.30, I2 = 88%) and fungal (1.72%, 95% CI 0.45−2.99, I2 = 0% versus 0.62%, 95% CI 0.00−1.55, I2 = 54%); however, COVID-19 children admitted to the ICU had a lower bacterial coinfection compared to the COVID-19 children in the ICU and non-ICU group (3.02%, 95% CI 1.70−4.34, I2 = 0% versus 4.91%, 95% CI 3.97−5.84, I2 = 87%). The most common identified virus and bacterium in children with COVID-19 were RSV (n = 342, 31.4%) and Mycoplasma pneumonia (n = 120, 23.1%). Conclusion: Children with COVID-19 seem to have distinctly lower rates of bacterial, fungal, and/or respiratory viral coinfections than adults. RSV and Mycoplasma pneumonia were the most common identified virus and bacterium in children infected with SARS-CoV-2. Knowledge of bacterial, fungal, and/or respiratory viral confections has potential diagnostic and treatment implications in COVID-19 children.
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Affiliation(s)
- Saad Alhumaid
- Administration of Pharmaceutical Care, Al-Ahsa Health Cluster, Ministry of Health, Al-Ahsa 31982, Saudi Arabia
- Correspondence: ; Tel.: +966-561-522-581
| | - Muneera Alabdulqader
- Pediatric Nephrology Specialty, Pediatric Department, Medical College, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Nourah Al Dossary
- General Surgery Department, Alomran General Hospital, Ministry of Health, Al-Ahsa 36358, Saudi Arabia
| | - Zainab Al Alawi
- Division of Allergy and Immunology, College of Medicine, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Abdulrahman A. Alnaim
- Department of Pediatrics, College of Medicine, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Koblan M. Al Mutared
- Administration of Pharmaceutical Care, Ministry of Health, Najran 66255, Saudi Arabia
| | - Khalid Al Noaim
- Department of Pediatrics, College of Medicine, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Mohammed A. Al Ghamdi
- Department of Pediatrics, King Fahad Hospital of the University, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia
| | - Suha Jafar Albahrani
- Division of Diabetology, Family Medicine Department, College of Medicine, King Faisal University, Al-Ahsa 36364, Saudi Arabia
| | - Abdulaziz A. Alahmari
- Department of Pediatrics, King Fahad Hospital of the University, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia
| | | | - Yameen Ali Almatawah
- Division of Infectious Diseases and Infection Control, Pediatric Department, Maternity and Children Hospital, Ministry of Health, Al-Ahsa 36422, Saudi Arabia
| | - Omar Musa Bayameen
- Public Health Administration, Directorate of Health Affairs, Ministry of Health, Al-Ahsa 36441, Saudi Arabia
| | - Ahmed Abdulwhab Alismaeel
- Public Health Administration, Directorate of Health Affairs, Ministry of Health, Al-Ahsa 36441, Saudi Arabia
| | - Sherifah Khaled Alzamil
- Public Health Administration, Directorate of Health Affairs, Ministry of Health, Al-Ahsa 36441, Saudi Arabia
| | - Samiah Ahmad Alturki
- Public Health Administration, Directorate of Health Affairs, Ministry of Health, Al-Ahsa 36441, Saudi Arabia
| | - Zahra’a Radi Albrahim
- Public Health Administration, Directorate of Health Affairs, Ministry of Health, Al-Ahsa 36441, Saudi Arabia
| | - Nasreen Ahmad Al Bagshi
- Public Health Administration, Directorate of Health Affairs, Ministry of Health, Al-Ahsa 36441, Saudi Arabia
| | - Hesham Yousef Alshawareb
- Southern Sector, Primary Care Medicine, Al-Ahsa Health Cluster, Ministry of Health, Al-Ahsa 36421, Saudi Arabia
| | - Jaafar Abdullah Alhudar
- Regional Medical Supply, Al-Ahsa Health Cluster, Ministry of Health, Al-Ahsa 36361, Saudi Arabia
| | | | - Samirah Mansour Alghadeer
- Infection Prevention and Control Administration, Al-Ahsa Health Cluster, Ministry of Health, Al-Ahsa 36421, Saudi Arabia
| | - Hassan Ali Alhadab
- Ambulatory Transportation Administration, Al-Ahsa Health Cluster, Ministry of Health, Al-Ahsa 36421, Saudi Arabia
| | | | - Yousif Ahmad Alabdulaly
- Quality Assurance and Patient Safety Administration, Directorate of Health Affairs, Ministry of Health, Al-Ahsa 36441, Saudi Arabia
| | - Abbas Al Mutair
- Research Center, Almoosa Specialist Hospital, Al-Ahsa 36342, Saudi Arabia
- College of Nursing, Princess Norah Bint Abdulrahman University, Riyadh 11564, Saudi Arabia
- School of Nursing, Wollongong University, Wollongong, NSW 2522, Australia
- Department of Nursing, Prince Sultan Military College, Dhahran 34313, Saudi Arabia
| | - Ali A. Rabaan
- Molecular Diagnostic Laboratory, Johns Hopkins Aramco Healthcare, Dhahran 31311, Saudi Arabia
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia
- Department of Public Health/Nutrition, The University of Haripur, Haripur 22620, Khyber Pakhtunkhwa, Pakistan
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