Publications by authors named "Robert Christensen"

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I
Improving Platelet Transfusion Practice.
Robert D Christensen, Patricia Davenport, Martha C Sola-Visner, Jamie Archambault, Cassidy Delaney

Neoreviews· January 2026

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Identifying barriers to complying with new restrictive NICU transfusion guidelines.
Sarah M Tweddell, Thomas M Morelli, Timothy M Bahr, Ashley Krueger, Robert D Christensen

J Perinatol· December 2025

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Involving neonatal hematology and transfusion medicine in global efforts to eliminate severe retinopathy of prematurity.
Robert D Christensen, Timothy M Bahr, Sarah J Ilstrup, M Elizabeth Hartnett, Robin K Ohls

J Perinatol· December 2025

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The nucleated red blood cell count at birth, the volume of red cell transfusions received, and the risk of developing retinopathy of prematurity.
Bailey Zeiler, Timothy M Bahr, Samuel D Esplin, M Elizabeth Hartnett, Sarah J Ilstrup, Robert D Christensen

J Perinatol· December 2025

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Using the refineR algorithm to generate indirect reference intervals for newborn infants for the parameters "Micro-R" and "HYPO-He".
Timothy M Bahr, Kelly Doyle, Robin K Ohls, Robert D Christensen

J Perinatol· November 2025

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Acquired ineffective erythropoiesis in pediatric ECMO patients: Higher than anticipated serum EPO levels and lower than anticipated reticulocytes counts were associated with mortality.
Zachary Weber, Christian C Yost, Mark Cody, Jonathan M King, Cody Henderson, Robert D Christensen

Perfusion· September 2025

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Understanding, detecting, and managing the "late" anemia of hemolytic disease of the fetus and newborn.
Robert D Christensen, Timothy M Bahr, Robin K Ohls

Best Pract Res Clin Obstet Gynaecol· September 2025

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A survey of level 3 NICUs in Utah to the June 2025 American Academy of Pediatrics Committee on Fetus and Newborn clinical report on postnatal cord blood sampling.
Robin K Ohls, Timothy M Bahr, David A Kaufman, Robert D Christensen

J Perinatol· September 2025

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A prospective randomized pilot trial comparing weekly vs. biweekly Darbepoetin administration to preterm infants.
Timothy M Bahr, Robert D Christensen, Kimberlee A Weaver-Lewis, Danielle M Scott, Erick Gerday

J Perinatol· July 2025

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Three studies needed to inform the design of the U-BET (umbilical cord blood for extremely low-gestational-age transfusions) clinical trial.
Timothy M Bahr, Robin K Ohls, Thomas R Christensen, Martha C Monson, Jessica M Page, Robert D Christensen

J Perinatol· July 2025

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Administering Supplemental Iron and Erythropoiesis-Stimulating Agents to Infants Born Preterm: What Do We Need to Build Consensus?
Robert D Christensen, Timothy M Bahr, Robin K Ohls

J Pediatr· April 2025

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Neonatal/perinatal diagnosis of hemolysis using ETCOc.
Robert D Christensen, Timothy M Bahr, Robin K Ohls, Kenneth J Moise

Semin Fetal Neonatal Med· March 2025

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A practical guide to reducing/eliminating red blood cell transfusions in the neonatal intensive care unit.
Robin K Ohls, Timothy M Bahr, Thomas G Peterson, Robert D Christensen

Semin Fetal Neonatal Med· March 2025

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Term umbilical cord blood, fully tested and processed, as the source of red blood cell transfusions for extremely-low-gestational age neonates.
Timothy M Bahr, Thomas R Christensen, Sarah J Ilstrup, Robin K Ohls, Robert D Christensen

Semin Fetal Neonatal Med· March 2025

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Treating preterm infants with erythropoietin does not increase the risk of retinopathy of prematurity.
Timothy M Bahr, Robin K Ohls, Robert D Christensen

J Perinatol· February 2025

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The number of blood transfusions received and the incidence and severity of chronic lung disease among NICU patients born >31 weeks gestation.
Timothy M Bahr, Robin K Ohls, Erick Henry, Patricia Davenport, Sarah J Ilstrup, Robert D Christensen

J Perinatol· February 2025

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Duration of hemolysis among infants with hemolytic disease of the fetus and newborn.
Timothy M Bahr, Kenneth J Moise, Kathy Lowry, Martha A Monson, Ibrahim A Hammad, Robert D Christensen

J Perinatol· February 2025

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Effects of vitamin D supplementation on cardiac biomarkers: Results from the STURDY trial.
Katharine W Rainer, William Earle, Erin D Michos, Edgar R Miller, Amal A Wanigatunga, Robert Christensen

Am J Prev Cardiol· December 2024

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Implementing evidence-based restrictive neonatal intensive care unit platelet transfusion guidelines.
Robert D Christensen, Timothy M Bahr, Patricia Davenport, Martha C Sola-Visner, Robin K Ohls

J Perinatol· October 2024

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Banked term umbilical cord blood to meet the packed red blood cell transfusion needs of extremely-low-gestational-age neonates: a feasibility analysis.
Robert D Christensen, Timothy M Bahr, Thomas R Christensen, Robin K Ohls, Jake Krong

J Perinatol· June 2024

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Erythrokinetic mechanism(s) causing the "late anemia" of hemolytic disease of the fetus and newborn.
Robert D Christensen, Timothy M Bahr, Robin K Ohls, Sarah J Ilstrup, Kenneth J Moise

J Perinatol· June 2024

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A survey of iron supplementation, iron status surveillance, and erythropoiesis stimulating agent use in level III NICUs in the United States.
Jared J Tuttle, Timothy M Bahr, Sarah M Tweddell, Robert D Christensen, Robin K Ohls

J Perinatol· June 2024

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Neonatal and Obstetrical Outcomes of Pregnancies Complicated by Alloimmunization.
Timothy M Bahr, Sarah M Tweddell, Jennifer M Zalla, Donna Dizon-Townson, Robin K Ohls, Robert D Christensen

Pediatrics· June 2024

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Hyperferritinemia among very-low-birthweight infants in Thailand: a prospective cohort study.
Cholticha Laohajeeraphan, Chaicharoen Tantanate, Robert D Christensen, Sopapan Ngerncham

J Perinatol· May 2024

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Low-Titer Type O Whole Blood for Transfusing Perinatal Patients after Acute Hemorrhage: A Case Series.
Nicholas R Carr, Timothy M Bahr, Robin K Ohls, Sarah M Tweddell, David S Morris, Robert D Christensen

AJP Rep· April 2024

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