Which sign would a nurse expect to find in a patient with a hematologic disorder in which microvascular clotting is occurring?

Which sign would a nurse expect to find in a patient with a hematologic disorder in which microvascular clotting is occurring?

• A. Tingling in fingers
• B. Cyanotic nail beds
• C. Pruritus at night
• D. Edema of lower legs

Answer: (B)

Microvascular clotting blocks small vessels, reducing blood flow to tissues and causing hypoxia. When perfusion to the nail beds is compromised, the blood in the microcirculation becomes more deoxygenated, leading to bluish discoloration—cyanosis. That visible nail-bed cyanosis reflects the decreased oxygenation from microthrombi in the small vessels. The other signs don’t specifically indicate microvascular clotting: tingling in the fingers suggests neuropathy or nerve compression rather than a clotting event; itching at night is often linked to other hematologic conditions like histamine release in polycythemia; edema of the lower legs is a nonspecific sign that can result from fluid overload, venous insufficiency, or other issues, not the microvascular clots themselves.

Microvascular clotting blocks small vessels, reducing blood flow to tissues and causing hypoxia. When perfusion to the nail beds is compromised, the blood in the microcirculation becomes more deoxygenated, leading to bluish discoloration—cyanosis. That visible nail-bed cyanosis reflects the decreased oxygenation from microthrombi in the small vessels.

The other signs don’t specifically indicate microvascular clotting: tingling in the fingers suggests neuropathy or nerve compression rather than a clotting event; itching at night is often linked to other hematologic conditions like histamine release in polycythemia; edema of the lower legs is a nonspecific sign that can result from fluid overload, venous insufficiency, or other issues, not the microvascular clots themselves.