Final answer:
Biphasic and monophasic waveforms in Doppler tracing are abnormal because they suggest venous insufficiency or arterial disease, indicating disrupted normal blood flow.
Step-by-step explanation:
Biphasic and monophasic waveforms are considered abnormal in Doppler tracing because they suggest issues with blood flow, such as venous insufficiency or arterial disease. These waveforms indicate a disruption in the normal blood flow, which is typically a triphasic waveform in healthy individuals with normal arterial circulation. A monophasic waveform can result from obstructed arterial flow, while a biphasic waveform may be associated with either peripheral arterial disease or partial arterial obstruction. Utilizing Doppler ultrasound, clinicians can assess the blood flow within vessels, and the detection of abnormal waveforms aids in the diagnosis of circulatory conditions. In the context provided, the correct answer is b) They suggest venous insufficiency. This can relate to conditions where the blood flow in the veins is impaired, leading to potential pooling and inadequate return of blood to the heart. Interpretation of Doppler waveforms is part of diagnosing vascular diseases and is crucial for determining the appropriate treatment and management of patients with suspected circulatory issues.