However, even the most compact negative pressure designs heavily restricted a patient's movement and obstructed access for caregivers.

但是，即使是最小巧的负压式呼吸机也会大大限制病人的移动，妨碍看护人员的工作。

Its compact design is based on an ancient art form.

其紧凑的设计基于一种古老的艺术形式。