Low-dose Acetylsalicylic Acid Before Non-cardiac Surgery

Study Overview
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Brief Summary
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This study aims to assess independent factors associated with the clinical decision to discontinue ASA preoperatively in patients undergoing elective non-cardiac surgery.

Detailed Description
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Acetylsalicylic acid (ASA) is widely used for primary and secondary prevention of cardiovascular diseases. A prothrombotic rebound phenomenon after aspirin cessation has been reported. ASA withdrawal is associated with an increased incidence of adverse cardiac events. In individuals with previous percutaneous coronary intervention (PCI), cessation of ASA may cause stent thrombosis or myocardial infarction. However, many patients undergo non-cardiac surgery within the first two years after PCI. Perioperatively, two counteracting risks have to be taken into account, first, the risk of thromboembolic complications, if ASA medication is discontinued and second, the risk of surgical bleeding, if ASA therapy is continued. However, factors contributing to preoperative decision-making for ASA-withdrawal are still unclear. This study aims to assess independent factors associated with the clinical decision to discontinue ASA preoperatively in patients undergoing elective non-cardiac surgery. In particular this study aims to determine if the presence of coronary stents is independently associated with ASA discontinuation. Furthermore this study assesses, if benefit-risk-estimates (numerical rating scales) of the patients and the supervising physicians are associated with the decision to withdraw ASA. Study design Patients on long-term ASA undergoing non-cardiac surgery as well as their supervising anesthesiologist participate in a preoperative survey. Detailed information about ASA medication, perioperative ASA use, comorbidities, factors that might be associated with the decision to discontinue ASA preoperatively and benefit-risk-estimates (numerical rating scales) are sampled by questionnaires.

Official Title
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Discontinuation of Low-dose Acetylsalicylic Acid Before Elective Non-cardiac Surgery: a Preoperative Monocentric Cross-sectional Study

Conditions
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Surgery, Platelet Dysfunction

Intervention / Treatment
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* Other: preoperative questionnaires


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 18 Years and older Scheduled for elective non-cardiac surgery Regular long-term ASA use, defined as daily low-dose (≤100mg) ASA therapy, even if ASA-medication was interrupted within the last 30 days before study inclusion Exclusion Criteria: < 18 Years No consent given

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| preoperative questionnaires<br>Patients on long-term acetylsalicylic acid undergoing non-cardiac surgery | Other: preoperative questionnaires<br>* no intervention, cross-sectional survey in a single group<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Preoperative discontinuation of acetylsalicylic acid medication | questionnaires (cross-sectional observation during preoperative assessment) | 1 day | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Bleeding, Adverse Cardiac Events, Adherence, Medication, Aspirin, Acetylsalicylic acid