A nurse performs Homans maneuver by flexing the knee and sharply dorsiflexing the foot. What response indicates a positive Homans sign?
A.
Cramping of the toes
B.
Blanching of the sole
C.
Resisting dorsiflexion
D.
Pain in the calf area .
The Correct Answer and Explanation is:
The correct answer is D. Pain in the calf area.
Homans’ Sign: Definition and Procedure
Homans’ sign is a clinical test used to assess for the presence of deep vein thrombosis (DVT) in the lower extremities. To perform the maneuver, the nurse flexes the patient’s knee and then sharply dorsiflexes the foot. This maneuver is thought to provoke pain if a clot is present in the deep veins of the leg.
Understanding the Test
- Procedure: The test involves two steps:
- Knee Flexion: The patient’s knee is flexed at a 30 to 45-degree angle.
- Dorsiflexion: The nurse then sharply dorsiflexes the patient’s foot toward the shin.
- Interpretation:
- Positive Homans’ Sign: Pain in the calf area upon performing the maneuver suggests that the patient might have DVT. This is because the maneuver may cause the clot to exert pressure against the vein walls, resulting in pain.
- Negative Homans’ Sign: No pain during the maneuver does not rule out DVT, as the test is not entirely reliable. The absence of pain does not necessarily mean the patient does not have a clot.
Clinical Relevance
Homans’ sign was once widely used as a screening tool for DVT. However, its clinical value has decreased over time due to its low sensitivity and specificity. Research has shown that it is not always accurate in diagnosing DVT, as false positives and negatives can occur. For example, pain can result from other conditions such as muscle strain or injury rather than DVT.
Modern Practice
Due to these limitations, the diagnosis of DVT is now more commonly based on a combination of clinical assessment, imaging studies like Doppler ultrasound, and biomarkers like D-dimer levels. These methods provide a more reliable diagnosis compared to relying solely on Homans’ sign.
In summary, while a positive Homans’ sign (pain in the calf area) can indicate potential DVT, it is not definitive. Comprehensive diagnostic approaches are preferred for accurate diagnosis and management.