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Vascular Calcifications on the Preoperative Radiograph: Predictor of Ischemic Complications in Total Knee
Julia V Woelfle-Roos1, Laura Dautel1, Dirk Wernerus1
1Department of Orthopaedic Surgery, University of Ulm, Ulm, Germany.
Insights
Vascular calcifications on preoperative knee arthroplasty (TKA) radiographs, particularly intimal-type, are linked to increased minor ischemic complications like delayed wound healing. This highlights the need for vigilance regarding calcifications during TKA procedures.
Area of Science:
- Orthopedic Surgery
- Vascular Medicine
- Radiology
Background:
- Vascular calcifications on preoperative radiographs for total knee arthroplasty (TKA) are suspected risk factors for ischemic complications.
- Empirical evidence supporting this assumption is lacking.
- This study aimed to correlate perioperative ischemic complications with vascular calcifications in TKA patients.
Purpose of the Study:
- To investigate the association between vascular calcifications detected on preoperative radiographs and perioperative ischemic complications in patients undergoing total knee arthroplasty (TKA).
- To differentiate the risks associated with intimal-type versus medial-type vascular calcifications.
- To provide evidence-based recommendations for managing patients with vascular calcifications undergoing TKA.
Main Methods:
- Retrospective analysis of 825 patients undergoing primary TKA between 2009-2011 with intraoperative tourniquet use.
- Exclusion of patients with pathological pulse status or prior vascular intervention.
- Classification of vascular calcifications as intimal or medial type and correlation with perioperative ischemic events.
Main Results:
- Vascular calcifications were present in 268 patients (medial: 54, intimal: 214).
- Major ischemic complications (e.g., arterial thrombosis) occurred in 2 patients (0.24%), with no significant difference based on calcification type.
- Minor ischemic complications, such as protracted wound healing, were significantly higher in patients with intimal-type calcifications (6.1%) compared to medial-type (1.9%) or no calcifications (1.6%) (P=.003), even after adjusting for age and diabetes.
Conclusions:
- Intimal-type vascular calcifications significantly increase the risk of minor ischemic complications following TKA.
- Preoperative radiographic identification of vascular calcifications warrants increased vigilance.
- Recommendations include careful intraoperative soft tissue management and diligent postoperative monitoring of vascular status in TKA patients with identified calcifications.
Background:
Vascular calcifications seen on the preoperative radiograph of patients scheduled for total knee arthroplasty (TKA) are intuitively seen as a risk factor for ischemic complications though there is no empiric evidence to support this assumption. The aim of this study was the correlation of perioperative ischemic complications and vascular calcifications of patients undergoing TKA.
Methods:
In this retrospective analysis, all 825 patients who had undergone primary TKA in the period 2009-2011 with intraoperative use of a tourniquet were included. Patients with pathologic pulse status and history of vascular intervention were excluded. Vascular calcifications seen on the preoperative radiograph were classified as intimal-type and medial-type calcifications and were correlated to perioperative ischemic complications.
Results:
Vascular calcifications were seen in 268 patients (medial type: n = 54, intimal type: n = 214). Major ischemic complications such as arterial thrombosis were seen in 2 patients, one of them with intimal-type calcifications and one without (complication rate 0.5% vs 0.2%, P = .715). The rate of minor ischemic complications such as protracted wound healing was significantly elevated in patients with intimal-type calcifications (6.1%) when compared to patients with medial-type calcifications (1.9%) and those without (1.6%, P = .003) even when multiple regression analysis was performed taking into account 2 potential influencing factors "age" and "diabetes mellitus" (P = .008).
Conclusion:
Owing to the significantly increased risk of ischemic complications in patients with intimal-type calcifications undergoing TKA, we recommend high alertness to the presence of calcifications on preoperative radiographs, careful intraoperative soft tissue management, and postoperative monitoring of the vascular status.
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