Comparing Opioid Prescription Patterns in Total Joint Arthroplasty Patients

Comparing Opioid Prescription Patterns in Total Joint Arthroplasty Patients: A Randomized Controlled Trial

The United States constitutes <5% of the world's population but over 80% of the opioid supply and 99% of the hydrocodone supply. In 2014, there were 18,893 deaths from prescription drug overdose, and orthopaedic surgeons are the third highest prescribing physicians for opioids. Surgeons often prescribe opioids to minimize postoperative pain and to reduce the likelihood of readmission for pain. Available data suggests that orthopaedic surgeons are the most likely physicians to prescribe opioids to Medicare patients, whose opioid prescriptions are over 7 times more likely to come from an orthopaedic surgeon than another type of physician, but orthopaedic surgeons also had the highest readmission rate for post-operative pain. Many studies have investigated the utilization of opioids after surgery to assess surgeon's tendencies to overprescribe, demographics of those likely to overuse, and adverse events of opioid abusers. The primary purpose of this randomized controlled trial is to determine whether prescribing fewer opioid pills per prescription reduces the total amount of opioids taken, even while allowing equal total opioid availability via increased frequency of prescription availability.

A recent paper by Kim et al prospectively investigated opioid utilization after upper extremity surgery. This study (n=1,416) showed an opioid utilization rate of just 34%, taking an average 8.1 pills out of 24 prescribed. Patients age 30-39, those having joint procedures, upper extremity/shoulder surgery, or self-pay/Medicaid insurance were all far more likely to overuse opioids. The study concluded that their surgeons prescribed 3 times the required opioid following surgery and gave recommendations for opioid distribution based on location, procedure type, and patient risk factors. This study's identification of over prescription is congruent with a study completed by Bates et al that showed 67% of patients had a surplus of medications, with 92% not receiving proper medication disposal instructions. Other recent literature has attempted to risk stratify patients who are more likely to abuse prescription opioids. Morris et al identified various risk factors including: family history of substance abuse, nicotine dependency, age <45, psychiatric disorders, and lower level of education. These risk factors are associated with aberrant behaviors (non-compliance, early refill request, "lost or stolen" medication), which should raise concerns for any provider prescribing opioids. Studies have shown that patients who are on chronic opioid therapy before surgery have worse outcomes. Nicholas Bedard et al compared chronic opioids users (n= 35,068) versus those who were opioid-naïve at the time of total knee arthroplasty (TKA) and found the opioid group had more opioid scripts filled per patient at discharge as well as at 3, 6, and 9 months (0.63 scripts/patient vs. 1.2 scripts/patient, p<0.05). These patients also had a higher Charlson Comorbidity Index (p<0.05) and higher rates of respiratory failure, acute kidney failure, pneumonia, all post-operative infections, and infections requiring return to the OR. The study concluded patients should have their opioid consumption controlled during the pre-operative and peri-operative period. In addition to the complications of opioid medications experienced by orthopaedic patients, a recent nationwide retrospective analysis presents an unintended yet severe problem associated with opioid prescriptions. The incidence of pediatric hospitalizations for opioid toxicity nearly tripled from 1997 to 2012. The over-prescription of opioids creates a readily available source for accidental ingestion by younger children and for intentional opioid overdose by older pediatric/adolescent patients. In fact, a family member's leftover pills have been described as the number one source for pediatric opioid overdose. Moreover, the Center for Disease Control reported that in 2015 the U.S. saw its highest incidence of opioid-related death.9 Given the frequency and severity of opioid diversion and misuse, orthopaedic surgeons should consider the best methods for controlling patients postoperative pain and also avoid facilitating opiate misuse, whether by orthopaedic patients or other community members. With this goal in mind, our study will investigate regimens for effective postoperative pain control that also minimize the total amount of opioids prescribed.

Self-reported by patient, we are asking for the number of Oxycodone taken by patients (5mg doses). This will be verified with patient bringing their pill bottle in and counted by a study investigator.

Postoperative Patient Reported Outcomes of Opioid naïve Patients Undergoing THA or TKA Between August 2017 and April 2018

Postoperative total hip and total knee arthroplasty patient reported outcomes at 90 days (All reported as scores on a scale, ranges below.). For hips: Hip Disability and Osteoarthritis Outcome Score Joint Replacement (Hoos Jr), for knees: Knee Injury and Osteoarthritis Outcome Score, Joint Replacement, (Koos Jr), additionally, all will complete the Veterans Rand-12 outcome (VR-12). All outcomes, closer to 100 are better outcomes. HOOS, JR: Questions coded 0 - 4 points, none - extreme pain, scored by summing responses (range 0-24), convert to t-score. Answer ranges 0 - 100 (0 - total hip disability, 100 -perfect hip health). KOOS, Jr: Same but for Knees VR-12: Assesses physical functioning, physical/ mental limitations. Scored as summary of mental/physical, measure in standard deviations out of 100 points, where a score of 100 shows a patient's health functioning physically and mentally at their their best, zero represents a worse outcome.

90 days post operative (higher values represent better functioning total hip or total knee replacements).

Complications will be recorded as follows post-operatively for 90 days following surgery; any patient that has a DVT/Pulmonary embolism, any return to the operating room within 90-days, any re-admission to the hospital within 90-days, Any report of superficial infection, any report of deep infection, a periprosthetic fracture of the joint replaced, cerebrovascular accident or transient ischemic attack, report of dislocation, or patients who report opioid withdrawal.

This will be done as monitored through the Illinois prescription monitoring program, collecting data on each patient enrolled to be sure that patients do not receive additional narcotic prescriptions beyond what is provided to them as part of the study.

Utilizing Preop Koos Jr, Preop Hoos Jr, and Pre operative VR-12, all subjects will be asked to provide a pre-operative patient reported outcome to compare to post-operative patient reported outcomes. All reported as scores on a scale, ranges below. HOOS, JR: Questions coded 0 to 4 points, none to extreme pain, scored by summing responses (range of 0-24), convert to interval score ranges 0 to 100 (0 - total hip disability, 100 -perfect hip health). KOOS, Jr: Same but for Knees VR-12: Assesses physical functioning, physical/ mental limitations. Scored as summary of mental and physical, measure in standard deviations. The scale range is 0 to 100, where a score of 100 represents the best physical and mental health and zero is the worst outcome.

10 days prior to surgery (higher values represent better functioning total hip or total knee replacements).

Utilizing the defense & veterans pain rating scale, patients enrolled will be asked at multiple time points after surgery regarding their pain. This is a pain assessment tool, using numerical rating scale, 0 (no pain), 1, 2, and 3 (mild), 4, 5, and 6 (moderate), 7, 8, and 9 (severe) to 10 (worst pain possible). The higher the score, the more pain.

Using the primary outcome of number of opioids taken by the patients while inpatient, those will be converted into morphine equivalents. This was obtained from the hospital chart during the patient's inpatient stay.

Using a Defense and Veterans Pain Rating scale, patients were asked from date of surgery to the date of discharge for daily inpatient pain scores. This is a pain assessment tool, using numerical rating scale, 0 (no pain), 1, 2, and 3 (mild), 4, 5, and 6 (moderate), 7, 8, and 9 (severe) to 10 (worst pain possible). The higher the score, the more pain.

assessed daily from time of surgery to discharge from hospital (1 days - 2 weeks), Day 14 scores reported

304 opioid naïve patients undergoing THA or TKA between August 2017 and April 2018, reporting number of pills not used Illinois prescription monitoring program- utilized to confirm no other physician prescribed opiates to the participating patients. They were asked at each visit regarding unused medications and brought to the office to properly dispose.

Inclusion Criteria: any patient > 18 years of age scheduled for primary total hip or knee arthroplasty who is not consuming opioids during the 4 weeks prior to surgery Exclusion Criteria: patients consuming opioids during the 4 weeks prior to surgery patients who are allergic to oxycodone or refuse to take oxycodone patients with a history of opioid dependence or illegal or "off-label" opioid use patients undergoing a revision total knee or total hip arthroplasty any patient less than 18 years of age

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