An accelerated path to surgery after hip fracture did not improve mortality or major complications, according to a new international randomized trial. However, a fast track to surgery hastened mobilization, weight-bearing, and hospital discharge, and reduced the risk of urinary tract infection and delirium.
The(Hip Fracture Accelerated Surgical Treatment and Care Track) study enrolled 2,970 patients (median age, 79 years; 69% women) during March 2014-May 2019. The study excluded patients younger than 45 years, as well as those who were on nonreversible anticoagulation and who had high-energy or more complex hip fractures. In all, 1,487 patients were randomly assigned to the accelerated-surgery group, which received early medical evaluation with a goal of heading to surgery within 6 hours of a hip fracture diagnosis. The goal was achieved, with patients in the intervention arm receiving care at a median 6 hours after diagnosis. Patients in the 69 participating hospitals in 17 countries who were assigned to standard of care received surgery at a median 24 hours after diagnosis (P less than .001).
“Observational data, clinical experience, and biological rationale suggest that the longer a patient is immobile and lying in a bed, the higher the risk of poor outcomes,” wrote principal investigators, and , of McMaster University, Hamilton, Ont., and their colleagues on the HIP ATTACK writing committee.
The study was the first large, randomized trial that directly compared accelerated surgery with standard of care, noted the authors. Previous observational studies had shown worse outcomes for those usual-care patients who waited longer for surgery.
In HIP ATTACK, there was no difference in the primary outcome measures of 90-day mortality and major complications for patients receiving surgery within 6 hours after hip fracture diagnosis, compared with those who received surgery within 24 hours. The coprimary outcome measures included serious complications, such as MI, stroke, venous thromboembolism, sepsis, pneumonia, and life-threatening or major bleeding.
In practice, the researchers found that patients in the accelerated-surgery group received medical clearance in a median time of 2 hours after a diagnosis of hip fracture, whereas the standard of care group was cleared in 4 hours.
At 90 days, 9% of patients in the accelerated-surgery group and 10% of those in the usual-care group had died, a nonsignificant difference between the two groups. In both groups, 22% of patients experienced a major complication. A post hoc analysis that looked for any site-clustering effects did not detect different outcomes, the investigators wrote.
Delirium occurred in 132 patients (9%) of the accelerated-surgery group and in 175 patients (12%) in the usual-care group (odds ratio, 0.72; 95% confidence interval, 0.58-0.92). Infection without sepsis and urinary tract infection were both less common in the accelerated-surgery group (hazard ratio, 0.80 and 0.78, respectively).
The authors noted that the potential benefits of a speedy course to surgery, including reduced immobility and less pain, could be negated if physicians had less time to optimize medical care for older patients with multiple comorbidities and who make up a significant proportion of those who sustain low-energy hip fractures. However, medical complications, such as MI and new-onset atrial fibrillation, were not seen more frequently in the accelerated-surgery group.
In an editorial accompanying the study,, and Fernando Lopez-Prats, MD, of the Universidad Miguel Hernández, Alicante, Spain, observed that the 6-hour window for hip fracture surgery may be difficult to achieve given clinical practicalities and that, in some cases, the 6-hour window might be unavoidable if severe comorbidities and overall poor health make early surgery inadvisable.
They also expressed concern that, despite the lack of harm shown in the patients who underwent accelerated surgery, the surgery “might negatively affect patients’ outcomes by preventing or limiting the opportunity for optimization of patients’ medical conditions before surgery.” They called for further study to delineate how fitness for surgery affects outcomes in accelerated surgery and to further examine whether the better outcomes are associated with improved cost-effectiveness.
Multiple HIP ATTACK coinvestigators reported relationships with pharmaceutical and medical device companies, including companies that manufacture hip prosthesis and orthopedic surgical devices and implants. The study was sponsored by the Canadian Population Health Research Institute, the Ontario Strategy for Patient Oriented Research Support Unit, the Ontario Ministry of Health and Long-Term Care, the Hamilton Health Sciences Foundation, Physicians’ Services Incorporated Foundation, Michael G. DeGroote Institute for Pain Research and Care, Smith & Nephew (to recruit patients in Spain), and Indiegogo Crowdfunding.
SOURCE: Borges F et al. Lancet. 2020 Feb. 9. .