Eligible patients will be
（1）Have acute medical condition，typically acute reversible organ failure（e.g.cardiac heart failure，acute renal failure）.
（2）Require a high level of observation，frequent intervention or therapies which is not available on ward.
For example（lists are not exhaustive or obligatory）：
①Continuous monitoring of vital signs（＜4 hourly）.
②Perfusor compact therapy（e.g.dopamine，dobutamine，heparin，hydralazine）.
③Acute severe asthma requiring nebulization＜4 hourly，continuous oxygen therapy and saturation monitoring.(https://www.daowen.com)
④Requirement for ongoing fluid resuscitation（e.g.septic shock）.
⑤Hypertensive crisis requiring iv and/or perfursor compact therapy，continuous monitoring and frequent interventions.
⑥Acute renal failure，end-stage chronic renal failure do not carry out HD/PD yet.
⑦Acute electrolyte/metabolic instability requiring frequent interventions/monitoring，（e.g.HNDC or DKA）
⑧Acute potential neurological conditions（including intoxications）with GCS below 12 requiring＜4 hourly neurological assessment.
⑨Neuromuscular patients（GBS）require＜4 hourly assessment.