Because coronal haematoma absorptance is slower, avoid by all means is carried with the needle broken, or go drawing blood with injector, can enter a bacterium because of taking instead so and produce infection, cause undesirable consequence.

• 由于头颅血肿吸收比较慢，切忌用针挑破，或用注射器去抽血液，这样反而会因带入细菌而发生感染，引起不良后果。