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Reverse Total Shoulder Arthroplasty
Published on: July 5, 2011
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Routine postoperative laboratory tests are unnecessary after primary reverse shoulder arthroplasty
Jordan W Paynter1, James A Raley1, Judith G Kyrkos1
1Department of Orthopaedics, Augusta University Medical Center, Augusta, GA, USA.
Journal of Shoulder and Elbow Surgery
|March 21, 2020
Summary
Routine postoperative lab tests after reverse shoulder arthroplasty (RSA) are often abnormal but rarely lead to intervention. We recommend selective testing for specific patient groups to improve efficiency and reduce unnecessary procedures.
Area of Science:
- Orthopedic Surgery
- Medical Laboratory Science
- Patient Outcomes Research
Background:
- Postoperative laboratory studies are common after primary reverse shoulder arthroplasty (RSA).
- The clinical utility and justification for routine postoperative laboratory testing in RSA remain unclear.
- This study aimed to assess the value of routine postoperative laboratory studies in RSA patients.
Purpose of the Study:
- To evaluate the impact of routine postoperative laboratory studies on patient management after primary RSA.
- To determine the rate of interventions triggered by abnormal laboratory values.
- To identify predictors of abnormal laboratory results and their association with clinical outcomes.
Main Methods:
- Retrospective review of 213 patients who underwent primary RSA over 10 years.
- Analysis of intervention rates, length of stay, and 90-day emergency department visits/readmissions.
- Multivariate logistic regression to identify risk factors for abnormal labs and postoperative events.
Main Results:
- 88.7% of patients had abnormal postoperative lab values, most commonly hemoglobin/hematocrit (69%).
- Only 12% of abnormal hemoglobin/hematocrit values led to transfusion, and only 1.8% of all abnormal labs resulted in non-transfusion interventions.
- Abnormal electrolytes and creatinine were associated with lower BMI and higher Charlson Comorbidity Index (CCI).
- No statistical difference in emergency department visits between patients with normal or abnormal lab results.
Conclusions:
- Routine postoperative laboratory testing after primary RSA is largely not justified, as 87.3% of results did not influence management.
- Selective postoperative testing is recommended: basic metabolic profile for patients with higher ASA classification/CCI and lower BMI, and complete blood count for those with lower preoperative hemoglobin.
- This approach can optimize resource utilization and patient care by focusing on clinically relevant laboratory findings.
