Halo Index and Adaptive Alarm Thresholds During Routine PACU Inpatient Care: "Normal" vs. "Non-normal" Recovery
Public ClinicalTrials.gov record NCT01811433. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The purpose of this study is to determine whether the Halo Index has utility in detecting the difference between normal and non-normal recovery of patients in the first few hours immediately following major inpatient surgery. A small but significant percentage of patients who undergo major surgery will experience a major life-threatening complication in the first 30 days following surgery. The chance of developing one or more of these complications increases with the size of the surgery and with the severity of the patient's preexisting medical problems. It is unknown whether fluctuations in a patient's vital signs and other measures of bodily function that occur early in the recovery period are associated with postoperative complications. If this is so, it may be possible to predict who is at increased risk for complications based on monitoring during the early recovery period. This study will make use of the Halo Index, a compilation of measures of patient functions collected by non-invasive monitoring devices. In addition to heart rate, blood pressure, temperature, and breathing rate, these include measures of dissolved oxygen in the blood, the amount of hemoglobin in the blood, and other parameters. Patients will have two additional non-invasive monitors attached during their stay in the hospital post-anesthesia care unit (PACU). After the patient has been discharged from the hospital, their medical record will be reviewed at two time points: The first will be soon after discharge. Normal recovery patients will be defined as those who require only IV fluids, pain medications and anti-emetic medications. Non-normal recovery will include those who require transfusions of blood products, airway interventions such as a breathing tube, blood pressure medications, or heart rhythm medications. The second chart review will occur 30 days after surgery. In this review, the presence or absence of the following events will be ascertained: rapid response team calls, admission to the intensive care unit, infection, pneumonia, the need for transfusion of 5 or more units of blood within a three-day period, septic shock, the need for ventilation with a breathing tube, blood clot in the lung, kidney failure, coma, stroke, heart attack, and death.
Study identification
- NCT ID
- NCT01811433
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 500 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Feb 28, 2013
- Primary completion
- May 31, 2014
- Completion
- May 31, 2014
- Last update posted
- Sep 18, 2014
2013 – 2014
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Fletcher Allen Health Care | Burlington | Vermont | 05401 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01811433, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Sep 18, 2014 · Synced Sep 6, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01811433 live on ClinicalTrials.gov.