Evaluating Dynamic Arterial Elastance in Septic Shock Patients.

Trial design

Treatments tested in this trial

• EaDyn Weaning Arm:

  Procedure/Surgery Procedure/SurgeryA medical or surgical procedure being studied.

  The initiation of vasopressor weaning coincides with the beginning of the stabilization phase, which occurs when patients achieve a MAP \>75 mmHg, a cardiac index (CI) \>2.5 L/min/m², and a lactate level \<2 mmol/L. The norepinephrine dose will be gradually tapered, decreasing by 0.02 mcg/kg/min every 30 minutes. In the experimental group, vasopressor weaning is guided by the EaDyn value. Weaning can proceed as long as the EaDyn remains at or above 0.90. However, if the value drops below 0.90, the weaning process halts, and the norepinephrine dose is reverted to the last dose where the EaDyn value was ≥ 0.90. Regardless of the EaDyn value, any patient experiencing a MAP decline below 50 mmHg will be withdrawn from the study. Should the MAP range between 50 mmHg and 69 mmHg, a fluid challenge of 250 mL of isotonic crystalloid must be administered before weaning continues.

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• PAM Weaning Arm:

  Procedure/Surgery Procedure/SurgeryA medical or surgical procedure being studied.

  The initiation of vasopressor weaning coincides with the beginning of the stabilization phase, which occurs when patients achieve a MAP \>75 mmHg, a cardiac index (CI) \>2.5 L/min/m², and a lactate level \<2 mmol/L. The norepinephrine dose will be gradually tapered, decreasing by 0.02 mcg/kg/min every 30 minutes. In the control group, vasopressor weaning progresses as long as the MAP remains at or above 70 mmHg. If the MAP falls between 50 and 69 mmHg, preload dependency is reassessed. Upon confirmation, a new fluid challenge is administered; vasopressor weaning halts, and the vasopressor dose reverts to its prior value. The weaning process can continue as long as the patient's MAP remains above 50 mmHg. If the MAP drops below this threshold, the patient exits the study.

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