“…10 However, no gold standard method could be applied for measuring hydration status objectively, contributing to a biggest challenge for targeted rehydration treatment suggestively. 16 We are wondering how to share the authors’ experience with other patients if IHCA patients are stated to have a BCR greater than 16.7, 10 since rehydration therapy is relatively difficult in the context of airway compromise and fluid overload in patients with co-existing cardiac diseases, especially heart failure. 16 Unfortunately, up to two-fifths of patients were found in Dr. Meng’s study.…”