Clinical Focus


  • Pediatric Critical Care Medicine

Academic Appointments


Professional Education


  • Medical Education: Western University of Health Sciences College of Osteopathic Medicine of the Pacific (2000) CA
  • Board Certification: American Board of Pediatrics, Pediatric Critical Care Medicine (2010)
  • Fellowship: AI Dupont Hospital for Children (2010) DE
  • Board Certification: American Board of Internal Medicine, Internal Medicine (2005)
  • Fellowship: Cedars-Sinai Nephrology Fellowship Program (2005) CA
  • Board Certification: American Board of Pediatrics, Pediatrics (2004)
  • Residency: LACplusUSC Pediatric Residency (2004) CA

All Publications


  • Dexmedetomidine for Sedation During Pediatric Noninvasive Ventilation RESPIRATORY CARE Eidman, D. B., Clauss, C. L., Kelly, S. A., Rhieu, J. M., McCollum, S., Couloures, K. G. 2022; 67 (3): 301-307

    Abstract

    Noninvasive ventilation (NIV) facilitates management of acute respiratory failure without intubation. Many pediatric patients cannot tolerate the discomfort associated with noninvasive support and require sedation with agents that may decrease respiratory drive. Dexmedetomidine does not decrease respiratory drive, and we hypothesized that its use would increase tolerance of noninvasive respiratory support without increasing risk for intubation.A retrospective chart review was performed of all subjects at least 3 months of age with acute respiratory failure requiring NIV who were admitted to the pediatric ICU at a children's hospital for a 3-y period from 2015-2018. Subjects were stratified to those receiving continuous dexmedetomidine versus those not receiving sedation. Medical history was reviewed for developmental delay (DD) or intellectual disability (ID) as well as basic demographic information. To control the association between these variables with both dexmedetomidine use and intubation, augmented inverse probability weighting was utilized to establish equivalent baselines between the dexmedetomidine and no-sedation groups. Primary outcome was intubation rate within 6 h of initiation of dexmedetomidine infusion or NIV.Based on the strong association between age and dexmedetomidine use, a statistical model including subjects > age 5 was not able to be generated, and these subjects were excluded from final analysis. One-hundred eight subjects were included in the final statistical analysis, with 60 receiving dexmedetomidine and 48 receiving no sedation. Dexmedetomidine was effective at reducing agitation, with no difference noted in intubation rate at 6 h between subjects receiving dexmedetomidine versus no sedation (13.1 vs 12.4%).Dexmedetomidine may allow tolerance of NIV in acute respiratory failure without increasing risk for intubation, especially in preschool age patients and those with DD or ID. A larger study involving multiple centers would help support our conclusions.

    View details for DOI 10.4187/respcare.09360

    View details for Web of Science ID 000761097500004

    View details for PubMedID 35078930

  • Efficacy of Intravenous Ketamine in Adolescent Treatment-Resistant Depression: A Randomized Midazolam-Controlled Trial. The American journal of psychiatry Dwyer, J. B., Landeros-Weisenberger, A., Johnson, J. A., Londono Tobon, A., Flores, J. M., Nasir, M., Couloures, K., Sanacora, G., Bloch, M. H. 2021: appiajp202020010018

    Abstract

    OBJECTIVE: Adolescent depression is prevalent and is associated with significant morbidity and mortality. Although intravenous ketamine has shown efficacy in adult treatment-resistant depression, its efficacy in pediatric populations is unknown. The authors conducted an active-placebo-controlled study of ketamine's safety and efficacy in adolescents.METHODS: In this proof-of-concept randomized, double-blind, single-dose crossover clinical trial, 17 adolescents (ages 13-17) with a diagnosis of major depressive disorder received a single intravenous infusion of either ketamine (0.5 mg/kg over 40 minutes) or midazolam (0.045 mg/kg over 40 minutes), and the alternate compound 2 weeks later. All participants had previously tried at least one antidepressant medication and met the severity criterion of a score >40 on the Children's Depression Rating Scale-Revised. The primary outcome measure was score on the Montgomery-Asberg Depression Rating Scale (MADRS) 24 hours after treatment.RESULTS: A single ketamine infusion significantly reduced depressive symptoms 24 hours after infusion compared with midazolam (MADRS score: midazolam, mean=24.13, SD=12.08, 95% CI=18.21, 30.04; ketamine, mean=15.44, SD=10.07, 95% CI=10.51, 20.37; mean difference=-8.69, SD=15.08, 95% CI=-16.72, -0.65, df=15; effect size=0.78). In secondary analyses, the treatment gains associated with ketamine appeared to remain 14 days after treatment, the latest time point assessed, as measured by the MADRS (but not as measured by the Children's Depression Rating Scale-Revised). A significantly greater proportion of participants experienced a response to ketamine during the first 3 days following infusion as compared with midazolam (76% and 35%, respectively). Ketamine was associated with transient, self-limited dissociative symptoms that affected participant blinding, but there were no serious adverse events.CONCLUSIONS: In this first randomized placebo-controlled clinical trial of intravenous ketamine in adolescents with depression, the findings suggest that it is well tolerated acutely and has significant short-term (2-week) efficacy in reducing depressive symptoms compared with an active placebo.

    View details for DOI 10.1176/appi.ajp.2020.20010018

    View details for PubMedID 33653121

  • How Residents Learn During Emergent Situations May Be Different Than How We Were Taught. Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies Couloures, K. G. 2020; 21 (10): 901–2

    View details for DOI 10.1097/PCC.0000000000002466

    View details for PubMedID 33009300

  • Can We Use Tissue Inhibitor Metalloproteinase-2 and Insulin-Like Growth Factor Binding Protein-7 Levels to Predict Acute Kidney Injury in Neonate and Infants Undergoing Cardiac Surgery? Not Yet. Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies Couloures, K. G., Marsenic, O. 2020; 21 (6): 593–94

    View details for DOI 10.1097/PCC.0000000000002282

    View details for PubMedID 32483026