Anterior Knee Pain and Patellar Tendon Elasticity After Infrapatellar Tendon-Split Tibial Intramedullary Nailing

Condition(s) studied

Investigational drug(s) / intervention(s)

Infrapatellar tendon-split tibial intramedullary nailing: Standard-of-care tibial intramedullary nailing performed through an infrapatellar longitudinal patellar tendon split approach. The procedure is not assigned by the protocol; only patients undergoing this routine surgical approach are observed.

Shear-wave ultrasound elastography: Non-invasive shear-wave ultrasound elastography of the patellar tendon performed at predefined study visits using a standardized imaging protocol.

Study summary

This prospective single-center observational cohort study will evaluate the relationship between anterior knee pain and patellar tendon elasticity after infrapatellar tendon-split tibial intramedullary nailing. Adult patients undergoing standard tibial intramedullary nailing through an infrapatellar tendon-split approach will be enrolled after ethics approval. Patellar tendon elasticity will be assessed using shear-wave ultrasound elastography before surgery and during follow-up at 6 weeks, 3 months, and 6 months. Clinical outcomes will include anterior knee pain severity, patellofemoral function, tendon-related symptoms, and knee range of motion. Inter-rater reliability between two independent radiologists will also be evaluated.

Eligibility

Primary outcome measure(s)

• Change in patellar tendon elasticity from baseline to 6 months — Preoperative baseline and 6 months postoperatively
  Patellar tendon elasticity measured by shear-wave ultrasound elastography in kilopascals. The primary analysis will assess the longitudinal change from baseline to 6 months.

Trial sites (1)

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