National Physical Therapy Examination (NPTE) Practice Exam

Which modality should be avoided after the surgical repair of the medial collateral ligament and anterior cruciate ligament in a 10-year-old?

1. Pulsed ultrasound

2. Pulsed shortwave diathermy

3. Interferential current

4. Transcutaneous electrical stimulation

The correct answer is: Pulsed ultrasound

Pulsed ultrasound should be avoided after the surgical repair of the medial collateral ligament and anterior cruciate ligament in a 10-year-old primarily due to the potential effects of ultrasound on developing tissues. In pediatric populations, their growing bones and soft tissues are particularly sensitive to thermal effects, which can arise from continuous ultrasound modalities. While pulsed ultrasound may minimize some of these risks visually when compared to continuous ultrasound, the inherent risks associated with ultrasound application—such as the possibility of thermal injury or disruption of healing tissues—make it a modality that is frequently contraindicated right after surgical interventions. The other modalities listed, such as pulsed shortwave diathermy or interferential current, may be utilized under specific conditions because they generally do not possess the same risks for thermal injury to growing tissues, and they can be beneficial in pain management and edema reduction during the post-operative rehabilitation phase. Therefore, in managing post-surgical treatment for young patients, caution around the use of modalities like pulsed ultrasound is essential, prioritizing the integrity and safety of the healing process.