Vacuum extraction: development and test of a procedure-specific rating scale

Area of Science:

• Medical Education
• Obstetrics & Gynecology
• Surgical Skills Assessment

Background:

• Vacuum extraction is a common obstetric procedure requiring specific technical skills.
• Assessing technical proficiency in vacuum extraction is crucial for patient safety and training.
• Existing assessment tools may not adequately capture the nuances of vacuum extraction technique.

Purpose of the Study:

• To develop a procedure-specific Objective Structured Assessment of Technical Skills (OSATS) scale for vacuum extraction.
• To validate the developed OSATS scale for vacuum extraction in a simulated setting.

Main Methods:

• A two-part study involving scale development using the Delphi method with obstetric experts.
• Validation through a prospective observational study with first-year residents and chief physicians.
• Construct validity assessed via simulated vacuum extraction scenarios and statistical analysis (Cronbach's alpha, interclass correlation).

Main Results:

• Consensus on the OSATS scale content was achieved through Delphi rounds.
• Significant performance differences were observed between residents and experts.
• The scale demonstrated high reliability with Cronbach's alpha (0.91-0.95) and interclass correlation (0.84-0.9).

Conclusions:

• The developed OSATS scale for vacuum extraction is a reliable and valid tool.
• The scale effectively differentiates competence levels in simulated vacuum extraction scenarios.
• This tool can enhance training and assessment in obstetric procedures.