Fig. 8From: Does tidal volume challenge improve the feasibility of pulse pressure variation in patients mechanically ventilated at low tidal volumes? A systematic review and meta-analysisStudy research string. TVC tidal volume challenge, â–³PPV absolute change of pulse pressure variation, â–³PPV% percentage change of pulse pressure variation, TPTD transpulmonary thermodilution, PEEP positive end-expiratory pressureBack to article page