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Evaluation of the causal effects between dopamine infusion changeover and fluctuations in mean arterial pressure in neonates
  1. Katherine Kirupakaran1,2,
  2. Paula de Sousa3,4,
  3. Celine Le Roux5,
  4. Lauren Redwood5,
  5. Heike Rabe1,4,
  6. Bhavik Anil Patel5
  1. 1Brighton and Sussex Medical School, Brighton, UK
  2. 2Maidstone and Tunbridge Wells NHS Trust, Maidstone, UK
  3. 3East Surrey Hospital, Redhill, UK
  4. 4Department of Neonatology, Brighton and Sussex University Hospital NHS Trust, Brighton, United Kingdom
  5. 5School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, UK
  1. Correspondence to Dr Bhavik Anil Patel, School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton BN2 4GJ, UK; b.a.patel{at}brighton.ac.uk; Dr Heike Rabe, Neonatology, Brighton Sussex University Hospitals NHS Trust, Brighton BN2 5BE, UK; heike.rabe{at}bsuh.nhs.uk

Abstract

Objective To evaluate whether changing dopamine infusions every 12 hours and preparing these infusions 30 min before administration reduces blood pressure fluctuations in preterm and term neonates.

Design This was a retrospective study using data from live patients on the neonatal unit and prospective study exploring stability of infusions in a laboratory-based neonatal ward simulation.

Setting Single-centre study in a tertiary neonatal surgical unit in a university teaching hospital.

Patients Neonates who received more than one subsequent dopamine infusion and had invasive arterial blood pressure monitoring, during their admission in the neonatal unit, were included.

Interventions As part of the Quality Improvement project, the standard operating procedure (SOP) was changed, and dopamine infusions were prepared by nursing staff and left to rest for 30 min before administering to the neonate. Additionally, infusions were replaced every 12 hours.

Main outcome measures The percentage change in mean arterial pressure (MAP) and the percentage loss in the drug concentration during infusion during changeover.

Results Our findings indicate that up to 15% of the initial dopamine concentration is lost after 24 hours. This results in a sharp variation in the dopamine concentration during infusion changeover that correlates with observed rapid fluctuations in MAP. In changing the SOP, no significant difference in the concentration of dopamine and MAP were observed over 12 hours.

Conclusions Delaying administration of dopamine infusions by 30 min after preparation combined with changing infusions 12 hourly has reduced MAP fluctuations. Therefore, the risks associated with MAP fluctuations, including intraventricular haemorrhages, are reduced.

  • neonatology
  • pharmacology
  • intensive care
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Footnotes

  • KK and PdS are joint first authors.

  • Twitter @bhavikanilpatel

  • Contributors KK and PdS were responsible for the collection and analysis of the patient data. CLR and LR conducted and analysed the laboratory simulated neonatal ward conditions based experimental data. HR and BAP were responsible for study design and overall analysis of the study findings. PdS, KK and BAP wrote the manuscript and all authors approved the final version of the manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Not required.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data availability statement All data relevant to the study are included in the article or uploaded as supplementary information.

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