Absence of vital signs的用法和样例：
- After HBO therapy and mechanical ventilation therapy in PE-SWD rabbits, cyanosis disappeared quickly, crackles were decreased, and PaO2 was significantly improved (P < 0.01). The abnormality of vital signs was ameliorated.
- Objective To compare the effects of propofol with traditional thiopental anesthesia for oral-maxillofacial surgery in terms of vital sign changes and awakening time.
- The absence of color in that drawing make it dull.
- We are in the absence of experience.
- This matter is of vital importance to us.