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Post-Operative Pain Relief: Zynrelef or Periarticular Injections in RATKA

Postoperative Pain Outcomes After Use of Bupivacaine-Meloxicam Extended-Release Solution in Robot Assisted Total Knee Arthroplasty: A Prospective Study

Status
Not yet recruiting
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07430085
Enrollment
150
Registered
2026-02-24
Start date
2026-07-31
Completion date
2028-02-28
Last updated
2026-07-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Knee Arthroplasty, Total, Osteoarthritis (OA), Osteoarthritis (OA) of the Knee, Pain After Surgery, Periarticular Block

Keywords

Zynrelef

Brief summary

Prospective Cohort of patients who are scheduled for a Robot Assisted Total Knee Arthroplasty (RATKA). A prospective survey of patient reported outcome measures (Numeric Rating Scale) will be obtained postoperatively of 72 hours, as well as at the postoperative opioid consumption after 72 hours.

Detailed description

Opioid use is a well-discussed issue in the United States among orthopedic surgeons, as while these drugs are helpful and necessary, they pose the risk of addiction and ultimately should be used as sparingly as possible. By taking a multimodal approach to pain management, this can be successfully achieved. Periarticular injections are currently used to achieve this goal, and 2021 a bupivacaine-meloxicam extended-release periarticular injection (Zynrelef) was introduced and is regularly implemented into RATKAs. Randomized clinical trials found that Zynrelef's use in traditional total knee arthroplasties (TKA) was just as effective as standard periarticular injections in reducing opioid use and pain, but whether Zynrelef works just as well if not better in RATKA is not yet established. Objectives: (primary and important secondary objectives) To evaluate the improvement in pain and use of opioids of a patient who received Zynrelef after undergoing RATKA compared to the traditional periarticular injections commonly used. The secondary objective will be documentation of the patient's use of other oral (over-the-counter) OTC pain relievers, such as acetaminophen or NSAIDs (non-steroidal anti inflammatory drugs). Study Design: Prospective Cohort Study (double arm) Setting/Participants: Patients who have undergone a standard of care RATKA at any Allegheny Health Network facility who consent to filling out a survey addressing their reported outcomes. Study Interventions and Measures: Patients will be evaluated with the Numeric Rating Scale (NRS) on postoperative days 1-3. Patients will be given paper forms which will be collected by the physicians at their next postoperative visit. A retrospective review of Epic Electronic Medical Records (EMR) will also be conducted to describe basic demographic characteristics.

Interventions

COMBINATION_PRODUCTbupivacaine-meloxicam (extended release)

These surgeons will be using Zynrelef (bupivacaine-meloxicam extended release) as a form of periarticular analgesia.

DRUGBupivacaine

These surgeons will be using the control injection (bupivacaine + ketorolac + lidocaine) as a form of periarticular analgesia.

DRUGKetorolac

These surgeons will be using the control injection (bupivacaine + ketorolac + lidocaine) as a form of periarticular analgesia.

DRUGLidocaine (drug)

These surgeons will be using the control injection (bupivacaine + ketorolac + lidocaine) as a form of periarticular analgesia.

Sponsors

Allegheny Singer Research Institute (also known as Allegheny Health Network Research Institute)
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 89 Years
Healthy volunteers
No

Inclusion criteria

Males or females aged 18-89 years Diagnosed with knee osteoarthritis requiring surgical intervention Indicated for unilateral RATKA

Exclusion criteria

Pediatric, pregnant, or incarcerated patients BMI of more than 45 kg/m2 Prolonged opioid use history of \>5 mg/day for \>1 month History of contralateral TKA \<2 years prior to the index TKA Type 1 Hypersensitivity to NSAIDs or local anesthetics Diagnosis of severe renal disease

Design outcomes

Primary

MeasureTime frameDescription
Amount of opioid medications used (measured in morphine milligrams equivalents)From completion of surgery to 3 days post-opSelf-report of opioid medications
Patient reported outcome measure (Numeric Rating Scale)From completion of surgery to 3 days post-opSelf-report of pain using numeric scale. Title: Numeric Rating Scale; Ranges from 0 to 10, where 10 is maximal pain and 0 is no pain at all.

Secondary

MeasureTime frameDescription
Amount of oral Over-the-counter (OTC) pain reliever medications usedFrom completion of surgery to 3 days post-operationSelf-report of Over-the-counter (OTC) pain relievers
Complications and Adverse EventsFrom completion of surgery to 3 days post-opReport of adverse events

Contacts

CONTACTObinna Ajah, MD
obinna.ajah@ahn.org877-660-6777
PRINCIPAL_INVESTIGATORAndrew Waligora, MD

Allegheny Health Network

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 7, 2026