Final answer:
Tourniquets should not be used on patients with a previous arterial bypass graft, a thigh circumference of 120 cm, or with Peripheral Vascular Disease (PVD). The correct answer is d) all of the above.
Step-by-step explanation:
Tourniquets should not be used on patients with certain medical conditions because they can potentially worsen the patient's condition. Specifically, tourniquets should never be used on patients with:
- A previous arterial bypass graft because the tourniquet could cause damage to the graft or reduce blood flow through it, leading to graft failure.
- A thigh circumference of 120 cm or larger, as a tourniquet may not provide even compression or may not be able to fully occlude the vessels, increasing the risk of injury or ineffective bleeding control.
- Peripheral Vascular Disease (PVD) because tourniquets can exacerbate ischemia and potentially lead to tissue damage in already compromised limbs.
Therefore, the correct answer to the question about which patients should not have a tourniquet used on them is d) all of the above.