Final answer:
The Wells score is used to predict the likelihood of a pulmonary embolism. None of the answer choices provided (A, B, C, or D) correctly represent the standard points associated with the Wells score criteria for PE. The correct points include 3 for signs/symptoms of DVT and 3 for PE being more likely than an alternative diagnosis, among others.
Step-by-step explanation:
The Wells score for pulmonary embolism (PE) is a clinical prediction tool used to assess the probability of a PE in a patient. Each attribute or criterion is assigned a certain number of points. The components and points are as follows:
- Signs and symptoms of DVT (deep vein thrombosis): 3 points
- Alternative diagnosis less likely than PE: 3 points
- Heart rate > 100 bpm: 1.5 points
- Immobilization or surgery in the previous four weeks: 1.5 points
- Previous DVT/PE: 1.5 points
- Hemoptysis: 1 point
- Malignancy (treatment for within 6 months, palliative): 1 point
Based on the scoring, a total Wells score of >6 points suggests a high probability of PE, 2-6 points indicates a moderate probability, and <2 points suggests a low probability. None of the options A, B, C, or D provided in the question exactly matches the standard scoring system for the Wells score.