What Are the Effects of Patient Point of Entry and Medicaid Status on Postoperative Opioid Consumption and Pain Following Primary Total Knee Arthroplasty?

Integrating mechanistic-based and classification-based concepts into perioperative pain management: an educational guide for acute pain physicians

Chronic pain begins with acute pain. Physicians tend to classify pain by duration (acute vs chronic) and mechanism (nociceptive, neuropathic and nociplastic). Although this taxonomy may facilitate diagnosis and documentation, such categories are to some degree arbitrary constructs, with significant overlap in terms of mechanisms and treatments. In clinical practice, there are myriad different definitions for chronic pain and a substantial portion of chronic pain involves mixed phenotypes. Classification of pain based on acuity and mechanisms informs management at all levels and constitutes a critical part of guidelines and treatment for chronic pain care. Yet specialty care is often siloed, with advances in understanding lagging years behind in some areas in which these developments should be at the forefront of clinical practice. For example, in perioperative pain management, enhanced recovery protocols are not standardized and tend to drive treatment without consideration of mechanisms, which in many cases may be incongruent with personalized medicine and mechanism-based treatment. In this educational document, we discuss mechanisms and classification of pain as it pertains to commonly performed surgical procedures. Our goal is to provide a clinical reference for the acute pain physician to facilitate pain management decision-making (both diagnosis and therapy) in the perioperative period.

Prolonged Opioid Use and Associated Factors After Open Reduction and Internal Fixation of Tibial Shaft Fractures

BACKGROUND

The aim of this retrospective cohort study was to determine the rate of prolonged opioid use and identify associated risk factors after perioperative opioid exposure for tibial shaft fracture surgery.

MATERIALS AND METHODS

We used the MarketScan Commercial Claims and Encounters database (IBM) to identify patients 18 to 64 years old who filled a peri-operative opioid prescription after open reduction and internal fixation of a tibial shaft fracture from January 2016 to June 2020. Multivariable logistic regression identified factors (eg, demographics, comorbidities, medications) associated with prolonged opioid use (ie, filling an opioid prescription 91 to 180 days postoperatively); adjusted odds ratios (ORs) and 95% CIs were reported.

RESULTS

The rate of prolonged opioid use was 10.5% (n=259/2475) in the full cohort and 6.1% (n=119/1958) in an opioid-naive subgroup. In the full cohort, factors significantly associated with increased odds of prolonged use included preoperative opioid use (OR, 4.76; 95% CI, 3.60-6.29; P<.001); perioperative oral morphine equivalents in the 4th (vs 1st) quartile (OR, 2.68; 95% CI, 1.75-4.09; P<.001); age (OR, 1.03; 95% CI, 1.02-1.04; P<.001); and alcohol or substance-related disorder (OR, 1.66; 95% CI, 1.15-2.40; P=.01). Patients in the Northeast and North Central (vs South) regions had decreased odds of prolonged use (OR, 0.61-0.69; P=.02-.04). When removing preoperative use, findings were similar in the opioid-naive subgroup.

CONCLUSION

Prolonged opioid use is not uncommon in this orthopedic trauma population, with the strongest risk factor being preoperative opioid use. Nevertheless, shared risk factors exist between the opioid-naive and opioid-tolerant subgroups that can guide clinical decision-making. [Orthopedics. 2024;47(4):e188-e196.].

Opioid Use during Hospitalization following Total Knee Arthroplasty: Trends in Consumption from 2016 to 2021

INTRODUCTION

In response to physician and patient concerns, many institutions have adopted protocols aimed at reducing postoperative opioid consumption after total knee arthroplasty (TKA). Thus, this study sought to examine how consumption of opioids has changed following TKA in the past six years.

METHODS

We conducted a retrospective review of all 10,072 patients who received primary TKA at our institution from January 2016 to April 2021. We collected baseline demographic data including patient age, sex, race, body mass index (BMI), American Society of Anesthesiologist (ASA) classification, as well as dosage and type of opioid medication prescribed on each postoperative day while the patient was hospitalized following TKA. This data was converted to milligram morphine equivalents (MME) per day hospitalized to compare rates of opioid use over time.

RESULTS

Our analysis found the greatest daily opioid use was in 2016 (43.2±68.6 MME/day) and the least was in 2021 (15.0±29.2 MME/day). Linear regression analyses found a significant linear downward trend in postoperative opioid consumption over time, with a decrease of 5.55 MME per day per year (Adjusted R-squared: 0.982, P<0.001). The highest visual analog scale (VAS) score was 4.45 in 2016 and the lowest was 3.79 in 2021 (P<0.001).

CONCLUSION

Opioid reducing protocols have been implemented for patients recovering from primary TKA in an effort to decrease reliance on opioids for postoperative pain control. The results of this study demonstrate that such protocols have been successful in reducing overall opioid use during hospitalization following TKA.

Association Between Statewide Medicaid Opioid Policy and Postoperative Opioid Prescribing among Surgeons at a Large Safety-Net Hospital

BACKGROUND

Restrictive state and payer policies may be effective in reducing opioid prescribing by surgeons, but their impact has not been well studied. In 2017, Washington Medicaid implemented an opiod prescribing limit of 42 pills, prompting a large regional safety-net hospital to implement a decision support intervention in response. We aimed to evaluate the effects on surgeons' prescribing.

STUDY DESIGN

We retrospectively studied postoperative opioid prescribing (quantity of pills prescribed at discharge) to opioid-naïve surgical patients at a regional safety-net hospital from 2016 to 2020. We investigated associations between the policy and opioid prescribing by using interrupted time series analysis, adjusting for clinical and sociodemographic factors.

RESULTS

A total of 12,799 surgical encounters involving opioid-naïve patients (59% male, mean age 52) were analyzed. Opioids were prescribed for 75%. From 2016 to 2020, the mean prescribed opioid quantity decreased from 36 pills to 17 pills. In interrupted time series analysis, the Medicaid policy implementation was associated with an immediate change of -8.4 pills (95% CI -12 to -4.7; p < 0.001) per prescription and a subsequent rate of decrease similar to that prepolicy. In a comparison of changes between patients insured through Medicaid vs Medicare, Medicaid patients had an immediate change of -9.8 pills (95% CI -19 to -0.76; p = 0.03) after policy implementation and continued decreases similar to those prepolicy. No immediate or subsequent policy-related changes were observed among Medicare patients.

CONCLUSION

In a large regional safety-net institution, postoperative opioid prescriptions decreased in size over time, with immediate changes associated with a state Medicaid policy and corresponding decision support intervention. These findings pose implications for surgeons, hospital leaders, and payers seeking to address opioid use via judicious prescribing.

Caring for Diverse and High-Risk Patients: Surgeon, Health System, and Patient Integration

Access and outcome disparities exist in hip and knee arthroplasty care. These disparities are associated with race, ethnicity, and social determinants of health such as income, housing, transportation, education, language, and health literacy. Additionally, medical comorbidities affecting postoperative outcomes are more prevalent in underresourced communities, which are more commonly communities of color. Navigating racial and ethnic differences in treating our patients undergoing hip and knee arthroplasty is necessary to reduce inequitable care. It is important to recognize our implicit biases and lessen their influence on our healthcare decision-making. Social determinants of health need to be addressed on a large scale as the current inequitable system disproportionally impacts communities of color. Patients with lower health literacy have a higher risk of postoperative complications and poor outcomes after hip and knee replacement. Low health literacy can be addressed by improving communication, reducing barriers to care, and supporting patients in their efforts to improve their own health. High-risk patients require more financial, physical, and mental resources to care for them, and hospitals, surgeons, and health insurance companies are often disincentivized to do so. By advocating for alternative payment models that adjust for the increased risk and take into account the increased perioperative work needed to care for these patients, surgeons can help reduce inequities in access to care. We have a responsibility to our patients to recognize and address social determinants of health, improve the diversity of our workforce, and advocate for improved access to care to decrease inequity and outcomes disparities in our field.

The Effects of Patient Point of Entry and Medicaid Status on Postoperative Opioid Consumption and Pain After Primary Total Hip Arthroplasty

INTRODUCTION

Medicaid expansion has allowed more patients to undergo total hip arthroplasty (THA). Given the continued focus on the opioid epidemic, we sought to determine whether patients with Medicaid insurance differed in their postoperative pain and narcotic requirements compared with privately or Medicare-insured patients.

METHODS

A single-institution database was used to identify adult patients who underwent elective THA between 2016 and 2019. Patients in the Medicaid group received Medicaid insurance, while the non-Medicaid group was insured commercially or through Medicare. Subgroup analysis was done, separating the private pay from Medicare patients.

RESULTS

A total of 5,845 cases were identified: 326 Medicaid (5.6%) and 5,519 non-Medicaid (94.4%). Two thousand six hundred thirty-five of the non-Medicaid group were insured by private payors. Medicaid patients were younger (56.1 versus 63.28 versus 57.4 years; P < 0.001, P < 0.05), less likely to be White (39.1% versus 78.2% versus 76.2%; P < 0.001), and more likely to be active smokers (21.6% versus 8.8% versus 10.5%; P < 0.001). Surgical time (113 versus 96 versus 98 mins; P < 0.001) and length of stay (2.7 versus 1.7 versus 1.4 days; P < 0.001) were longer for Medicaid patients, with lower home discharge (86.5% versus 91.8% versus 97.2%; P < 0.001). Total opioid consumption (178 morphine milligram equivalents [MMEs] versus 89 MME versus 82 MME; P < 0.001) and average MME/day in the first 24 hours and 24 to 48 hours (52.3 versus 44.7 versus 44.45; P < 0.001 and 73.8 versus 28.4 versus 29.8; P < 0.001) were higher for Medicaid patients. This paralleled higher pain scores (2.71 versus 2.31 versus 2.38; P < 0.001) and lower Activity Measure for Post-Acute Care scores (18.77 versus 20.98 versus 21.61; P < 0.001).

CONCLUSIONS

Medicaid patients presenting for THA demonstrated worse postoperative pain and required more opioids than their non-Medicaid counterparts. This highlights the need for preoperative counseling and optimization in this at-risk population. These patients may benefit from multidisciplinary intervention to ensure that pain is controlled while mitigating the risk of continuation to long-term opioid use.