After tympanostomy tube insertion, which method may be used to determine patency?

After tympanostomy tube insertion, which method may be used to determine patency?

• A. Visual inspection
• B. Impedance tympanometry
• C. Valsalva maneuver
• D. Instillation of an ototopical suspension

Answer: (A)

Patency means the tube lumen is open to allow air and drainage between the middle ear and the ear canal. The most direct, reliable way to confirm this after placement is to visually inspect the tympanostomy tube and the tympanic membrane, ensuring the tube’s opening is clearly patent and not blocked by crusts, debris, or tissue. Impedance tympanometry isn’t reliable with a tympanostomy tube because the external opening bypasses the tympanic membrane, making middle-ear pressure measurements inaccurate. The Valsalva maneuver can sometimes help but requires cooperation and isn’t definitive in young children. Instilling an ototopical suspension has no role in determining patency; it’s a treatment rather than a test for lumen openness.

Patency means the tube lumen is open to allow air and drainage between the middle ear and the ear canal. The most direct, reliable way to confirm this after placement is to visually inspect the tympanostomy tube and the tympanic membrane, ensuring the tube’s opening is clearly patent and not blocked by crusts, debris, or tissue.

Impedance tympanometry isn’t reliable with a tympanostomy tube because the external opening bypasses the tympanic membrane, making middle-ear pressure measurements inaccurate. The Valsalva maneuver can sometimes help but requires cooperation and isn’t definitive in young children. Instilling an ototopical suspension has no role in determining patency; it’s a treatment rather than a test for lumen openness.