prof. drs. Z.A. (Petra M.A.) Visschedijk

prof. drs. Z.A. (Petra M.A.) Visschedijk

Associate Professor - medical
  • Birth Center Neonatology - Medical



Petra Lemmers was graduated in medical science at Leiden University in the Netherlands (cum laude) and was trained in pediatrics at the Sophia Children’s Hospital/Erasmus University Hospital Rotterdam (NL) and in neonatal medicine in the Isala Clinics Zwolle (NL) and the Wilhelmina Children’s Hospital/University Medical Center Utrecht (NL).

At the present time she is associate professor in neonatology (research school Child Health, University Medical Center Utrecht) and is  working as a consultant neonatologist at the NICU of the Wilhelmina Children’s Hospital Utrecht. She is also involved as an expert in the customer excellence program 'Samen voor de Patient!' of the University Medical Center Utrecht.

The main focus of research on the NICU  is the neonatal brain: brain monitoring, brain hemodynamics, neuroprotection, brain imaging and neurodevelopmental outcome (prof Manon Benders and prof Linda de Vries; research schools Brain and Child Health ). In 2003 she started her research concerning the clinical use of non-invasive cerebral monitoring by near infrared spectroscopy (NIRS) in (preterm) neonates admitted on the NICU. She defended her thesis “The clinical use of near infrared spectroscopy‐monitored cerebral oxygen saturation and extraction in the preterm infant” in 2010 and published until now > 70 peer reviewed papers about this subject in prominent scientific journals.

Nowadays on the NICU the brain of preterm infants, neonates after perinatal asphyxia and all infants undergoing surgery in the neonatal period is monitored by NIRS during the most vulnerable period after birth: during transition, during treatment with hypothermia, but also during surgery.

She also participates in national and international collaborative projects concerning NIRS (SafeBoosc-trial: prof Gorm Greisen Kopenhagen Denmark; TOHOP-trail/cerebral hemodynamics: prof Istvan Seri Los Angeles USA, currently Doha Quatar; NIRS-project concerning monitoring cerebral autoregulatory ability: prof Gunnar Naulaers and prof Sabine van Huffel Leuven, Belgium. She is supervising several PhD students and is involved in education programs concerning brain monitoring in neonates in the Netherlands and abroad.

Side Activities

Member Society of Pediatric Research

Member European Society of Pediatric Research

Board member pediatric post-gradual education (Stichting PAOK Midden Nederland)

Member Dutch society of Pediatrics  (NVK): Neonatology; neonatal neurology, neonatal hemodynamics

Fellowship and Awards

2012 Grant NutsOhra Foundation

2011Grant UMCU/WKZ Foundation

Research Output (93)

Early cerebral hypoxia in extremely preterm infants and neurodevelopmental impairment at 2 year of age:A post hoc analysis of the SafeBoosC II trial

Plomgaard Anne Mette, Schwarz Christoph E, Claris Olivier, Dempsey Eugene M, Fumagalli Monica, Hyttel-Sorensen Simon, Lemmers Petra, Pellicer Adelina, Pichler Gerhard, Greisen Gorm Jan 2022, In: PLoS ONE. 17

Expectative management of a patent ductus arteriosus: pays the brain the price?

Vijlbrief D, van Bel Frank, Lemmers PM, Alderliesten Thomas, Benders M, Baerts Wim 15 Sep 2021,

Prenatal Use of Sildenafil in Fetal Growth Restriction and Its Effect on Neonatal Tissue Oxygenation-A Retrospective Analysis of Hemodynamic Data From Participants of the Dutch STRIDER Trial

Terstappen Fieke, Richter Anne E, Lely A Titia, Hoebeek Freek E, Elvan-Taspinar Ayten, Bos Arend F, Ganzevoort Wessel, Pels Anouk, Lemmers Petra M, Kooi Elisabeth M W 3 Dec 2020, In: Frontiers in Pediatrics. 8 , p. 1-11

Cerebral near-infrared spectroscopy monitoring versus treatment as usual for extremely preterm infants:a protocol for the SafeBoosC randomised clinical phase III trial

Hansen Mathias Lühr, Pellicer Adelina, Gluud Christian, Dempsey Eugene, Mintzer Jonathan, Hyttel-Sørensen Simon, Heuchan Anne Marie, Hagmann Cornelia, Ergenekon Ebru, Dimitriou Gabriel, Pichler Gerhard, Naulaers Gunnar, Cheng Guoqiang, Guimarães Hercilia, Tkaczyk Jakub, Kreutzer Karen B, Fumagalli Monica, Claris Olivier, Lemmers Petra, Fredly Siv, Szczapa Tomasz, Austin Topun, Jakobsen Janus Christian, Greisen Gorm 30 Dec 2019, In: Trials. 20

Brain Activity and Cerebral Oxygenation After Perinatal Arterial Ischemic Stroke Are Associated With Neurodevelopment

Wagenaar Nienke, van den Berk Daphne J. M., Lemmers Petra M. A., van der Aa Niek E., Dudink Jeroen, van Bel Frank, Groenendaal Floris, de Vries Linda S., Benders Manon J. N. L., Alderliesten Thomas 8 Aug 2019, In: Stroke. 50 , p. 2668-2676 9 p.

Postoperative cerebral oxygenation was not associated with new brain injury in infants with congenital heart disease

Claessens Nathalie H P, Jansen Nicolaas J G, Breur Johannes M P J, Algra Selma O, Stegeman Raymond, Alderliesten Thomas, van Loon Kim, de Vries Linda S, Haas Felix, Benders Manon J N L, Lemmers Petra M A 14 Mar 2019, In: Journal of Thoracic and Cardiovascular Surgery. 158 , p. 867-877.e1

Low Cerebral Oxygenation in Preterm Infants Is Associated with Adverse Neurodevelopmental Outcome

Alderliesten Thomas, van Bel Frank, van der Aa Niek E., Steendijk Paul, van Haastert Ingrid C., de Vries Linda S., Groenendaal Floris, Lemmers Petra Dec 2018, In: The Journal of Pediatrics. 207 , p. 109-116.e2

Cerebral oxygenation and autoregulation in infants with critical congenital heart disease

Claessens NHP, Breur JMPJ, Stegeman R, Algra SO, benders m, Lemmers PM Nov 2018,

Cerebrovascular autoregulation in preterm fetal growth restricted neonates

Cohen Emily, Baerts Willem, Caicedo Dorado Alexander, Naulaers Gunnar, van Bel Frank, Lemmers Petra M A 24 Oct 2018, In: Archives of Disease in Childhood Fetal and Neonatal Edition. 104 , p. F467-F472

Hemodynamic assessment of the patent ductus arteriosus:Beyond ultrasound

Kluckow M, Lemmers P Aug 2018, In: Seminars in Fetal & Neonatal Medicine. 23 , p. 239-244 6 p.

All research output

Thank you for your review!

Has this information helped you?

Please tell us why, so that we can improve our website.

Working at UMC Utrecht





Practical uses cookies

This website uses cookies This website displays videos from, among others, YouTube. Such parties place cookies (third-party cookies). If you do not want these cookies, you can indicate that here. We also place cookies ourselves to improve our site.

Read more about the cookie policy

Agree No, rather not