Estimated oxygen extraction versus dynamic parameters of fluid-responsiveness for perioperative hemodynamic optimization of patients undergoing non-cardiac surgery: a non-inferiority randomized controlled trial.

Background: Goal directed therapy (GDT) is able to improve mortality and reduce complications in selected high-risk patients undergoing major surgery. The aim of this study is to compare two different strategies of perioperative hemodynamic optimization: one based on optimization of preload using dynamic parameters of fluid-responsiveness and the other one based on estimated oxygen extraction rate (OER) as target of hemodynamic manipulation.

Methods: This is a multicenter randomized controlled trial.

[Conscience clause in end-of-life care.].

The article proposes a critical reflection on issues that appeal to the conscience clause as part of end of life care can produce and what can guarantee freedom of conscience, self-determination of those involved and respect for the dignity of the sick person. After a philosophical and normative analysis, the article is organized on the basis of two important documents for discussion: a position paper of Società Italiana di Anestesia Analgesia Rianimazione e Terapia Intensiva (SIAARTI) signed by several scientific societies "Grandi insufficienze d'organo end stage: cure intensive o cure palliative?" and the Design of Law currently being debated "Norme in materia di consenso informato e di disposizioni anticipate di trattamento". In particular, the conscience clause has been discussed in the light of advance care planning (ACP), which represents the instrument to guarantee the shared planning of care and the shared-decision making.