Inferior Vena Cava Ultrasound: proposal for a new nursing intervention

Objective: To develop and analyze evidence of content validity of a nursing intervention called Inferior Vena Cava Ultrasound. Methods: This is a methodological study divided into two phases: in the first, a narrative literature review of studies published in the previous five years was carried out, aiming to develop a new nursing intervention based on the Nursing Interventions Classification recommendations. The second phase consisted of analyzing evidence of content validity of the nursing intervention by experts on the subject in relation to clarity, theoretical relevance and practical relevance, calculating the Content Validity Ratio (CVR). Results: Twenty-one studies were identified that addressed the inferior vena cava assessment site as well as the type of transducer, patient position and how inferior vena cava distensibility was calculated, which guided the construction of the nursing intervention Ultrasound: Inferior Vena Cava. Three rounds of assessment were necessary to achieve critical CVR, and the final intervention was made up of 19 activities and a definition, with an average time to complete it of five minutes. Conclusion: The nursing intervention was developed based on articles published in the previous five years and presented adequate evidence of content validity. The intervention can be applied in clinical care practice and be used both in nursing teaching and research.