Tammra McCauley

Post-op pain keeping you up? Your hospital stay may be longer

Pain can make it difficult for some patients to get a good night’s rest while recovering after certain kinds of surgery, often resulting in longer hospital stays.

In particular, the study by researchers at Henry Ford Hospital in Detroit shows patients who reported poor sleep while in the hospital following total hip replacement or knee replacement surgery had higher pain scores.

post surgical pain in the hospital

More pain, less sleep

“Our results show that increased pain scores result in deceased sleep duration,” says study lead author Anya Miller, MD, with the Department of Otolaryngology-Head & Neck Surgery at Henry Ford. “So better pain control could potentially improve sleep duration for these patients.”

The study sought to identify the amount of sleep disruption that occurs in the post-operative in-patient hospital setting. As previous studies on this topic have shown, patients commonly report being awoken by noise, lights or hospital staff while in the hospital.

That’s why for the Henry Ford study, Dr Miller and study senior author Kathleen Yaremchuk, MD, purposely chose a hospital floor that observes a quiet time between 10 p.m. and 6 a.m. where the doors are closed and lights are dimmed.

This setting enabled them to better determine the relationship between sleep disruption caused by pain.

Fifty patients who had undergone total hip or knee replacement surgery were included in the study. These surgeries offer variables that are easier to measure in that the surgery and perioperative interventions are standardized with a pain protocol before and after surgery.

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The researchers looked at the patients’ total sleep time, sleep efficiency, pain scores and use of narcotics for pain.

The study results reveal:



  • Patients have significantly decreased sleep efficiency and wake more frequently when compared to the general population
  • Poor sleep results in higher pain scores
  • Better pain control can result in improved sleep efficiency and decreased awakenings
  • Improved sleep efficiency could result in decreased length of stay in the hospital after surgery

“Sleep is very important to patients’ recovery following surgery,” says Dr Miller.

“If we can identify factors that cause disruption in patients’ sleep such as pain, noise and interruptions in the hospital setting we can help improve sleep quality and potentially decrease adverse outcomes.”



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