Ballottement Apr 2026

This test is highly specific for large effusions but may miss smaller amounts of fluid, which are better detected using the Bulge Sign . 2. Obstetric Ballottement

Use one hand to firmly stroke downward from the mid-thigh toward the kneecap. This "milks" fluid out of the suprapatellar pouch and into the space behind the patella. ballottement

Performed by applying a sharp tap to the abdominal wall to feel the fetus move away and return. 3. Abdominal Ballottement This test is highly specific for large effusions

The patella feels like it is "floating." You will feel it move through fluid, click against the femur, and then rebound or "ballotte" back toward your finger. This "milks" fluid out of the suprapatellar pouch

The clinician inserts two fingers into the vagina and gives a sharp upward tap against the lower segment of the uterus. If the fetus is present and not yet engaged in the pelvis, it will float upward and then fall back, tapping against the clinician’s fingers.

In pregnancy, ballottement is a "probable sign" used to detect the fetus as it floats in amniotic fluid.

While maintaining pressure with the first hand, use the index finger of the other hand to sharply push the patella downward toward the femur (thigh bone). Findings: