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Related Concept Videos

Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.

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A Prospective Double-Blinded Randomized Controlled Trial Comparing the Direct Superior Approach Versus the Posterior

Babar Kayani1, Sujith Konan1, Jenni Tahmassebi1

  • 1University College Hospital, Bloomsbury, London, England, United Kingdom.

The Journal of Bone and Joint Surgery. American Volume
|April 28, 2025
PubMed
Summary
This summary is machine-generated.

The direct superior approach (DSA) for total hip arthroplasty (THA) did not show reduced postoperative pain compared to the posterior approach (PA). This study found no significant difference in pain scores, indicating DSA

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Area of Science:

  • Orthopedic Surgery
  • Biomechanics
  • Surgical Approaches

Background:

  • The direct superior approach (DSA) modifies the posterior approach (PA) for total hip arthroplasty (THA).
  • DSA aims to preserve specific soft tissues, including the iliotibial band and short external rotators (excluding piriformis and conjoined tendon).

Purpose of the Study:

  • To compare postoperative pain scores between the direct superior approach (DSA) and the posterior approach (PA) in total hip arthroplasty (THA).

Main Methods:

  • Prospective randomized study of 80 patients undergoing primary THA.
  • Identical implant designs and standardized postoperative rehabilitation were used for both DSA and PA groups.
  • Outcomes, including pain scores, were recorded by blinded observers for 2 years.

Main Results:

  • No significant difference in postoperative pain scores at 24 hours (Visual Analogue Scale) between the PA and DSA groups.
  • Comparable baseline characteristics (age, sex, BMI) between the groups.
  • Similar hospital discharge times and low rates of superficial wound infections in both groups.

Conclusions:

  • The direct superior approach (DSA) for THA does not offer a significant advantage in reducing postoperative pain compared to the posterior approach (PA).
  • Preservation of specific soft tissues with DSA did not translate to improved pain outcomes in this study.