einstein (São Paulo). 06/Feb/2019;17(1):eAO4439.

Near-infrared spectroscopy parameters in patients undergoing continuous venovenous hemodiafiltration

Renato Carneiro de Freitas Chaves ORCID logo , Philipe Franco do Amaral Tafner ORCID logo , Felipe Ko Chen ORCID logo , Letícia Bagatini Meneghini ORCID logo , Thiago Domingos Corrêa ORCID logo , Roberto Rabello Filho ORCID logo , Miguel Cendoroglo Neto ORCID logo , Oscar Fernando Pavão dos Santos ORCID logo , Ary Serpa Neto ORCID logo

DOI: 10.31744/einstein_journal/2019AO4439

ABSTRACT

Objective

To investigate the impacts of continuous venovenous hemodiafiltration on the microcirculation in patients with acute kidney injury.

Methods

A prospective observational pilot study conducted in a 40-bed, open clinical-surgical intensive care unit of a private tertiary care hospital located in the city of São Paulo (SP), Brazil. Microcirculation was assessed using near-infrared spectroscopy by means of a 15mm probe placed over the thenar eminence. Vascular occlusion test was performed on the forearm to be submitted to near-infrared spectroscopy by inflation of a sphygmomanometer cuff to 30mmHg higher than the systolic arterial pressure. The primary endpoint was the assessment of near-infrared spectroscopy-derived parameters immediately before, 1, 4 and 24 hours after the initiation of continuous venovenous hemodiafiltration.

Results

Nine patients were included in this pilot study over a period of 2 months. Minimum tissue oxygen saturation measured during the vascular occlusion test was the only near-infrared spectroscopy-derived parameter to differed over the time (decrease compared to baseline values up to 24 hours after initiation of continuous venovenous hemodiafiltration).

Conclusion

The impacts of microcirculatory dysfunction on clinical outcomes of patients undergoing to continuous venovenous hemodiafiltration need to be further investigated.

Near-infrared spectroscopy parameters in patients undergoing continuous venovenous hemodiafiltration

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