Lymphedema: A Significant Risk Factor for Infection and Implant Failure After Total Knee Arthroplasty

Aims Due to the opioid epidemic in the USA, our service progressively decreased the number of opioid tablets prescribed at discharge after primary hip (THA) and knee (TKA) arthroplasty. The goal of this study was to analyze the effect on total morphine milligram equivalents (MMEs) prescribed and post-discharge opioid repeat prescriptions. Methods We retrospectively reviewed 19,428 patients undergoing a primary THA or TKA between 1 February 2016 and 31 December 2019. Two reductions in the number of opioid tablets prescribed at discharge were implemented over this time; as such, we analyzed three periods (P1, P2, and P3) with different routine discharge MME (750, 520, and 320 MMEs, respectively). We investigated 90-day refill rates, refill MMEs, and whether discharge MMEs were associated with represcribing in a multivariate model. Results A discharge prescription of < 400 MMEs was not a risk factor for opioid represcribing in the entire population (p = 0.772) or in opioid-naïve patients alone (p = 0.272). Procedure type was the most significant risk factor for narcotic represcribing, with unilateral TKA (hazard ratio (HR) = 5.62), bilateral TKA (HR = 6.32), and bilateral unicompartmental knee arthroplasty (UKA) (HR = 5.29) (all p < 0.001) being the highest risk for refills. For these three procedures, there was approximately a 5% to 6% increase in refills from P1 to P3 (p < 0.001); however, there was no significant increase in refill rates after any hip arthroplasty procedures. Total MMEs prescribed were significantly reduced from P1 to P3 (p < 0.001), leading to the equivalent of nearly 500,000 fewer oxycodone 5 mg tablets prescribed. Conclusion Decreasing opioids prescribed at discharge led to a statistically significant reduction in total MMEs prescribed. While the represcribing rate did not increase for any hip arthroplasty procedure, the overall refill rates increased by about 5% for most knee arthroplasty procedures. As such, we are now probably prescribing an appropriate amount of opioids at discharge for knee arthroplasty procedure, but further reductions may be possible for hip arthroplasty procedures. Cite this article: Bone Joint J 2021;103-B(7 Supple B):103–110.

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Surgical Case Order is an Independent Risk Factor for Postoperative Infection in Primary Total Knee Arthroplasty

10.21203/rs.3.rs-751166/v1 ◽

2021 ◽

Author(s):

Dengying Wu ◽

Chao Jia ◽

Hongwei Lu ◽

Shuoyi Zhou ◽

Zheng wu ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Risk Factor ◽

Knee Arthroplasty ◽

Independent Risk Factor ◽

Operative Time ◽

Operating Time ◽

Significant Risk ◽

Surgical Case ◽

Operative Outcomes ◽

Total Knee

Abstract Background: Total knee arthroplasty is regarded as the most effective treatment for severe knee joint problems. Surgery case order influences operative outcomes according to previous studies. This study aims to evaluate the effect of surgical case order on operative outcomes for TKA.Methods: A retrospective study was conducted on 4,267 TKAs performed by three surgeons at our hospital from February 2008 to February 2018. Variables, such as surgical time, loss of blood, and hospitalization stay, were also recorded and analysed. Logistic regression was used to analyse every variable as a potential risk for a surgical site infection.Results: Of the 4267 cases in this cohort, 1531 TKAs were classified as first-round cases, 1194 TKAs were second-round cases, 913 TKAs were third-round cases, 490 TKAs were fourth-round cases, and 139 were fifth-round or later cases. The mean operating time was shorter in intermediate cases (P< 0.01). Perioperative adverse events were increased in later surgical cases (P< 0.01). Later case order (OR= 1.29 [95% CI: 1.17–1.56], P<0.01) was a significant risk factor for severe arthroplasty complications. The operative time and length of stay were increased for cases performed later in the day. However, blood loss is not statistically associated with case order. Conclusions: Surgical case order is an independent risk factor for surgical infection. Significantly increased operative time and longer LOS were noted for third-round or later TKA cases. Our results identify potentially modifiable risk factors contributing to infection rates in TKA, and cases operated on later in the day in the same room were more likely to have a higher infection risk.

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Abnormal Coagulation as a Risk Factor for Post-Operative Complications Following Primary and Revision Total Hip and Total Knee Arthroplasty

The Journal of Arthroplasty ◽

10.1016/j.arth.2021.04.024 ◽

2021 ◽

Author(s):

Joyce J. Chung ◽

Martine Dolan ◽

Michael J. Patetta ◽

Justin T. DesLaurier ◽

Nickolas Boroda ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Risk Factor ◽

Knee Arthroplasty ◽

Total Hip ◽

Operative Complications ◽

Total Knee ◽

Post Operative Complications

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Increased risk of periprosthetic joint infection after acute, traumatic wound dehiscence following primary total knee arthroplasty

The Bone & Joint Journal ◽

10.1302/0301-620x.103b6.bjj-2020-2425.r1 ◽

2021 ◽

Vol 103-B (6 Supple A) ◽

pp. 191-195

Author(s):

Elizabeth B. Gausden ◽

Matthew B. Shirley ◽

Matthew P. Abdel ◽

Rafael J. Sierra

Keyword(s):

Total Knee Arthroplasty ◽

Knee Arthroplasty ◽

Periprosthetic Joint Infection ◽

Joint Infection ◽

Significant Risk ◽

Wound Dehiscence ◽

Increased Risk ◽

Primary Tkas ◽

Traumatic Wound ◽

Total Knee

Aims To describe the risk of periprosthetic joint infection (PJI) and reoperation in patients who have an acute, traumatic wound dehiscence following total knee arthroplasty (TKA). Methods From January 2002 to December 2018, 16,134 primary TKAs were performed at a single institution. A total of 26 patients (0.1%) had a traumatic wound dehiscence within the first 30 days. Mean age was 68 years (44 to 87), 38% (n = 10) were female, and mean BMI was 34 kg/m2 (23 to 48). Median time to dehiscence was 13 days (interquartile range (IQR) 4 to 15). The dehiscence resulted from a fall in 22 patients and sudden flexion after staple removal in four. The arthrotomy was also disrupted in 58% (n = 15), including a complete extensor mechanism disruption in four knees. An irrigation and debridement with component retention (IDCR) was performed within 48 hours in 19 of 26 knees and two-thirds were discharged on antibiotic therapy. The mean follow-up was six years (2 to 15). The association of wound dehiscence and the risk of developing a PJI was analyzed. Results Patients who sustained a traumatic wound dehiscence had a 6.5-fold increase in the risk of PJI (95% confidence interval (CI) 1.6 to 26.2; p = 0.008). With the small number of PJIs, no variables were found to be significant risk factors. However, there were no PJIs in any of the patients who were treated with IDCR and a course of antibiotics. Three knees required reoperation including one two-stage exchange for PJI, one repeat IDCR for PJI, and one revision for aseptic loosening of the tibial component. Conclusion Despite having a traumatic wound dehiscence, the risk of PJI was low, but much higher than experienced in all other TKAs during the same period. We recommend urgent IDCR and a course of postoperative antibiotics to decrease the risk of PJI. A traumatic wound dehiscence increases risk of PJI by 6.5-fold. Cite this article: Bone Joint J 2021;103-B(6 Supple A):191–195.

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Preoperative Hyponatremia Is Associated with Reoperation and Prolonged Length of Hospital Stay following Total Knee Arthroplasty

The Journal of Knee Surgery ◽

10.1055/s-0038-1641156 ◽

2018 ◽

Vol 32 (04) ◽

pp. 344-351 ◽

Cited By ~ 3

Author(s):

Matthew Abola ◽

Joseph Tanenbaum ◽

Thomas Bomberger ◽

Derrick Knapik ◽

Steven Fitzgerald ◽

...

Keyword(s):

Total Knee Arthroplasty ◽

Risk Factor ◽

Hospital Stay ◽

Knee Arthroplasty ◽

Length Of Hospital Stay ◽

Adverse Outcomes ◽

Limited Information ◽

Improvement Program ◽

Prolonged Length ◽

Total Knee

AbstractHyponatremia is a risk factor for adverse surgical outcomes, but limited information is available on the prognosis of hyponatremic patients who undergo total knee arthroplasty (TKA). The purpose of this investigation was to compare the incidence of major morbidity (MM), 30-day readmission, 30-day reoperation, and length of hospital stay (LOS) between normonatremic and hypontremic TKA patients.The American College of Surgeons National Surgical Quality Improvement Program database was used to identify all primary TKA procedures. Hyponatremia was defined as <135 mEq/L and normonatremia as 135 to 145 mEq/L; hypernatremic patients (>145 mEq/L) were excluded. Multivariable logistic regression was used to determine the association between hyponatremia and outcomes after adjusting for demographics and comorbidities. An α level of 0.002 was used and calculated using the Bonferroni correction. Our final analysis included 88,103 patients of which 3,763 were hyponatremic and 84,340 were normonatremic preoperatively. In our multivariable models, hyponatremic patients did not have significantly higher odds of experiencing an MM (odds ratio [OR]: 1.05; 99% confidence interval [CI] 0.93–1.19) or readmission (OR: 1.12; 99% CI: 1–1.24). However, patients with hyponatremia did experience significantly greater odds for reoperation (OR: 1.24; 99% CI: 1.05–1.46) and longer hospital stay (OR: 1.15; 99% CI: 1.09–1.21). We found that hyponatremic patients undergoing TKA had increased odds of reoperation and prolonged hospital stay. Preoperative hyponatremia may be a modifiable risk factor for adverse outcomes in patients undergoing TKA, and additional prospective studies are warranted to determine whether preoperative correction of hyponatremia can prevent complications.

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