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Changes in tissue perfusion are critically important in the newborn, particularly during periods of vulnerability, such as the transitional period after birth or following hypoxic ischaemic injury. Tissue impedance (or resistance to blood flow) is an important factor in the assessment of perfusion and may be evaluated using bedside ultrasound.1–3 Spatio-temporal imaging correlation involves using a three-dimensional ultrasound probe to make a slow sweep through a region, capturing multiple two-dimensional colour images. Using the measured heart rate as a timing guide, the colour images are rearranged and merged to create …
Contributors All authors made substantial contributions to the conception or design of the work, or the acquisition, analysis or interpretation of data. All authors assisted in drafting the work or revising it critically for important intellectual content. All authors have approved the final version of this submission. All authors were accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work were appropriately investigated and resolved.
Competing interests None.
Patient consent Obtained.
Ethics approval South Eastern Sydney Local Health District Human Research Ethics Committee.
Provenance and peer review Not commissioned; externally peer reviewed.