Effects of Mobility Dose on Discharge Disposition in Critically Ill Stroke Patients

The investigators have previously developed and validated the Surgical Intensive Care Unit
Optimal Mobilization Score (SOMS), an algorithm to guide and facilitate early mobilization to
advance mobility of surgical intensive care unit patients (NCT01363102). In addition, the
investigators have established the use of bedside ultrasound technology to quantify cross
sectional area of the rectus femoris muscle, which allows an objective, user-independent
quantification of muscle wasting (NCT02270502).

This is a prospective, observational study to observe the relation between mobility dose,
muscle wasting and patient outcomes in critically ill stroke patients.

Patients will be enrolled within 48 hours of ICU admission. The investigators will measure
the dose of activity, that is duration and intensity of mobilization in critically ill
patients with ischemic stroke and intracerebral hemorrhage. By mobility "dose" the
investigators are referring to all provider-directed activities (by nursing, and physical
therapists) meant to enhance the patient's mobility level. The investigators take into
account mobility "dose", defined as a function of both the mobility level (e.g., sitting at
the edge of the bed, ambulating) as well as its duration. Of note, there is so far no
published data available that describes patients' mobility "dose" in such an integrative,
semi-quantitative fashion.

The investigators use the existing mobility intensity quantification tool (MQS) (NCT03196960)
and test the hypotheses that mobilization dose predicts muscle wasting in critically ill
stroke patients, adverse hospital discharge disposition as well as 90 day Barthel Index. The
investigators will apply hierarchical testing to evaluate the association between
mobilization dose and discharge disposition as well as 90-day Barthel Index.

The Mobilization Quantification Score (MQS) is a composition of the validated ICU mobility
score (SOMS), a 0 to 10 value scale that measures the mobility milestones in critically ill
patients, multiplied by a for each level previously defined time unit (5 or 30 minutes
correspond to one unit depending on mobilization level).

In order to capture the muscle status at ICU admission, determined by the first bedside
ultrasound of the rectus femoris muscle after enrollment, and the change in rectus femoris
muscle diameter throughout stay, the investigators will conduct repetitive measurements of
the cross sectional area of the rectus femoris muscles (RF-CSA) of both legs. This
longitudinal setting will allow to investigate muscle wasting due to immobilization and other
severe illness related factors in the paretic and non-paretic limb.

The investigators will conduct a scheduled phone call 30 days and 90 days after hospital
discharge by getting in contact with either the patient or a family member to obtain
follow-up data. This conversation will include questions that allow to identify the Barthel
Index at 30 days, the Barthel Index and GOS-E score at 90 days, and if the patient has been
readmitted to a hospital within 30 days of hospital discharge and mortality.

Discharge disposition is defined as discharge to facilities providing long-term care
assistance for daily activities, including nursing homes and skilled nursing facilities,
hospice at the patient's home, hospice in a health care facility; or in-hospital mortality.
The Barthel Index is a measure of functional disability originally designed to evaluate
progress of rehabilitation in patients with stroke and neuromuscular disease. The GOS-E
(Extended Glasgow Outcome Scale) is a global scale for functional outcome that rates patient
status into eight categories: Dead Vegetative State, Upper and Lower Severe Disability, Upper
and Lower Moderate Disability, Upper and Lower Good Recovery.

Inclusion Criteria:

- Aged 18 years and older

- Admitted to the neurological intensive care service within the past 48 hours

- an expected ICU length of stay of at least 48h

- New onset ischemic stroke or non-traumatic intracerebral hemorrhage

- Baseline functional independence: Barthel-Index of 70 or above 2 weeks before
admission (obtained retrospectively from patient or proxy)

Exclusion Criteria:

- Transfers from other institutions (hospitals, long-term rehabilitation facilities,
skilled nursing facilities) with a stay >48h at the outside institution

- absence of lower extremities

- not committed to full support

- exclusive or clinically predominant posterior circulation ischemic stroke

- subarachnoid hemorrhage, subdural and epidural hemorrhage