Things We Do For No Reason™: Routine Overnight Vital Sign Checks

While evidence-based medicine influences much of clinical care, “real-world” needs encountered at the bedside often drive early adapters to innovate. Nurses, who spend the most time at the bedside and conduct the most regular patient assessments, have recognized that not all patients need vital signs checked every 4 hours throughout the night. In 2013, Hands et al conducted a chart review of hospital patterns and found that nurses obtained complete vital sign checks on patients less frequently throughout the night than during the day.⁵ Their work further showed that nurses used their clinical judgment to make decisions about risk: Those patients deemed low risk by the nurses received fewer vital sign checks while the sicker patients received monitoring every 4 hours throughout the night.

Few researchers have quantitatively identified reasons why nurses may choose to not conduct frequent observations for some patients, beyond the providers’ own experience and judgment. In one study, Hope et al conducted a qualitative analysis of nurses to better understand their reasoning behind who should and should not receive overnight monitoring.⁶ The results of the analysis revealed that nurses recognize the importance of sleep in support of health and healing and use their clinical judgement when deciding which patients and conditions can forgo frequent observations.Stiver et al conducted trailblazing work that examines the outcomes of decreasing overnight vital sign checks for low-risk hospitalized patients through a randomized pilot study.⁷ In order to ensure patient safety, their group employed regular nurse observations throughout the night without waking the patient. Those patients assigned to less monitoring overnight reported a trend toward better sleep during hospitalization without the occurrence of any adverse events or escalation in care.

Most important, evidence indicates that sleep disruptions in the hospital worsen health and impede healing; further supporting nurses’ instincts and practices. Hospitalized adults without comorbidities who experience inadequate sleep during hospitalization have a higher perception of pain.⁸ Similarly, research has associated hospital-induced sleep deprivation and a higher odds of elevated blood glucose in those without diabetes, or “hyperglycemia of hospitalization.” ⁹ Furthermore, national organizations have recognized the importance of sleep. The American Academy of Nursing, as part of its Choosing Wisely™ campaign, states that, in the hospital, nurses should not disturb a patient’s sleep “unless the patient’s condition or care specifically requires it.”¹⁰

Finally, in the era of COVID-19, any opportunity to support physical distancing and to limit face-to-face interaction could protect our patients and staff from acquiring SARS-CoV-2.

While consistent vital sign checks allow for early identification of those trending toward clinical deterioration, risk stratification of ward patients can identify those who may benefit from overnight Q4 vital sign checks. While clinicians often use their judgment to identify a subset of low-risk patients for de-escalation of overnight care, artificial intelligence such as Modified Early Warning Score (MEWS) and Pediatric Early Warning Signs (PEWS) may have a role to play. These validated systems use physiologic symptoms that present prior to significant vital sign alterations to identify patients at risk for clinical deterioration.¹¹ As an example, one randomized, controlled trial used a risk stratification tool to eliminate overnight monitoring for low-risk patients. Patients slept more soundly and reported fewer noise disruptions and higher satisfaction with the nursing staff. No adverse events were reported for those who were electronically stratified as low risk.¹²Further, forcing clinicians to decide on the need for overnight vitals by removing the Q4 vital sign default in the electronic health records (EHR) may minimize overnight disruptions. The University of Chicago in Illinois has implemented “sleep-friendly” options for vital sign ordering in the EHR for both children and adults. Enhanced order sets force providers to consider whether patients qualify for fewer overnight interventions. This change, alongside staff education and empowerment, reduced interruptions overnight for both populations and improved patient experience.¹³ This patient-centered practice mirrors a recent recommendation from the American Academy of Nursing to minimize sleep disruptions for hospitalized patients by letting low-risk patients sleep.¹⁰