Hospitals Rethink Early Morning Blood Draws to Improve Patient Sleep

Delaying in-hospital blood draws by just 2 hours helped sleep quality and quantity, researchers find.

Mar. 18, 2026 at 9:58am

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A study at Parkview Physicians Group in Indiana found that delaying early morning blood draws from 4 AM to 6 AM improved patients' sleep quality and duration. The researchers assigned 128 patients to either the 4 AM or 6 AM blood draw group and found the 6 AM group had higher sleep quality scores and reported an average of 7 hours of sleep compared to 5.9 hours for the 4 AM group. The findings highlight the importance of considering sleep-friendly changes to hospital workflows, and some hospitals are now exploring ways to push back the timing of routine blood draws.

Why it matters

Frequent clinical interventions like early morning blood draws can disrupt patient sleep, leading to adverse outcomes like cognitive deficits, depression, impaired immune function, and elevated blood pressure. Improving patient sleep during hospitalization is important, as sleep deprivation can negatively impact health for up to a month after discharge.

The details

The Parkview Physicians Group study assigned 128 patients from adult medical units to either a 4 AM or 6 AM blood draw group. The 6 AM group had a mean sleep quality score of 63.7 compared to 5.2 for the 4 AM group. The 6 AM group also reported an average of 7 hours of sleep compared to 5.9 hours for the 4 AM group. Researchers say the findings highlight the need to consider sleep-friendly changes to hospital workflows. Some hospitals are now exploring ways to push back the timing of routine blood draws, though logistical challenges around staffing and coordinating with clinicians remain.

  • The Parkview Physicians Group study was published on February 4, 2026.

The players

Stanley Chakabva

An adjunct clinical associate professor of medicine at the Indiana University School of Medicine who led the Parkview Physicians Group study.

Harlan M. Krumholz

The director of the Yale New Haven Hospital Center for Outcomes and Research who coined the term 'Posthospital Syndrome' to describe the increased health risks patients face in the 30 days after discharge.

Vineet Arora

The dean for medical education at the Pritzker School of Medicine, University of Chicago, who has studied patient empowerment programs to reduce medical care disruptions.

Margaret Fang

A professor of medicine and chief of the Division of Hospital Medicine at the University of California San Francisco who discusses individualizing blood draw timing for some patients.

Cesar Caraballo-Cordovez

A hospitalist at Yale New Haven Hospital who is leading a quality improvement project to explore pushing back the timing of blood draws at their facility.

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What they’re saying

“We had hypothesized that those would be the findings we would get.”

— Stanley Chakabva, Adjunct clinical associate professor of medicine

“These improvements highlight the importance of considering sleep-friendly operational changes in hospital workflows.”

— Stanley Chakabva, Adjunct clinical associate professor of medicine

“Changing lab times for clinicians is notoriously difficult due to the desire to have labs in the morning for rounds and decision making.”

— Vineet Arora, Dean for medical education

“When patients advocate for themselves, it makes us stop and reevaluate — Do I need them [blood draws] first thing?”

— William A. Stevens, Hospitalist

“If you are only getting labs every 48 hours because someone was stabilizing, you did not need them at 4 AM and you could get them at 6 AM.”

— Vineet Arora, Dean for medical education

What’s next

At Yale New Haven Hospital, a quality improvement project is in the discussion phase to explore pushing back the timing of routine blood draws. The hospital is gathering input from physicians, nurses, phlebotomists, and others, and the program may be launched in the next year or so.

The takeaway

This research highlights the significant impact that early morning blood draws can have on patient sleep and the growing recognition among hospitals that rethinking traditional blood draw timing may lead to better outcomes. While logistical challenges remain, some facilities are now actively exploring ways to delay routine blood draws to improve the patient experience and minimize sleep disruptions during hospitalization.