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Article History

Received: 24 February 2022

Accepted: 30 May 2022

First Online: 16 June 2022

Declarations

:

: This study was performed in accordance with the European Directive for pig protection (DOUE-L-2009–80287 2009) and the Spanish legislation for animal protection in experimentation and other scientific purposes, including teaching (Real Decreto 53/2013, 2013). Expert veterinarians were in charge of caring and handling the animals. The Ethical Committee for Animal Experiments, University of Zaragoza, Spain approved this study (reference number: PI01/22). Informed consent was obtained from the owner of the animals.

: Not applicable.

: SM (founder) and ML (employee) are permanent staff members from KUBUS, the company manufacturing both the calibrated catheter and the commercial ultrasound W3® mentioned in the manuscript, but this company had no significant financial contribution to this work. The rest of authors declare no conflict of interests.